WO2016192627A1

WO2016192627A1 - Imaging device and method of zoom lens

Info

Publication number: WO2016192627A1
Application number: PCT/CN2016/084308
Authority: WO
Inventors: 伍志坚
Original assignee: 深圳市星苑科技有限公司
Priority date: 2015-06-05
Filing date: 2016-06-01
Publication date: 2016-12-08
Also published as: CN104967775B; CN104967775A

Abstract

The present invention relates to an imaging device and method of a zoom lens. The device comprises: at least two zoom imaging units, wherein focal length segments of each of the zoom imaging units progressively increase in sequence, and the focal length segments of two neighboring zoom imaging units partially overlap; a channel selector, connected to the zoom imaging units and configured to select a signal inputted by at least one of the zoom imaging units as an output thereof; and a control unit, in communication connection with the zoom imaging units and the channel selector respectively. The control unit is configured to control focal length segments of a zoom imaging unit in a current imaging and a zoom imaging unit in a subsequent imaging, control a sequential overlap of a focal distance between each two of the zoom imaging units between the focal length segments, and also control the channel selector to sequentially switch the zoom imaging unit in the current imaging to the zoom imaging unit in the subsequent imaging as a signal input terminal. The device and method can reduce an attenuation effect on environmental illuminance of a zoom lens having a wide-ranged focal length segment.

Description

Technical field

[0001] The present invention relates to a video imaging apparatus, and more particularly to an apparatus and method for imaging a zoom lens.

Data analysis by the public safety department shows that illegal crimes usually occur in areas with low illumination and poor lighting conditions. From the time of the crime, the nighttime crimes were more than the daytime, accounting for 79.1%. Therefore, after the video image forming apparatus (hereinafter referred to as a camera) enters the field of public security monitoring, the minimum illumination condition (hereinafter referred to as low illumination performance) that the camera can satisfy the basic imaging index becomes the target that the user is eagerly awaiting. In the same way, in order to improve the efficiency of the use of the camera, the maximum range from the near to far (hereinafter referred to as the coverage) that the camera can see also becomes the focus of the user.

[0003] The coverage of the camera is related to the focal length of the lens. When the focal length of the lens (usually the lens is small) changes from short to long (for example, from 4mm to 80mm), the camera can see the range from near to far, covering The degree is getting bigger and bigger. Cameras usually have a large coverage by configuring a continuous zoom lens.

[0004] The low illumination performance of the camera is related to the focal ratio of the lens (the focal length aperture aperture ratio, which is generally referred to as the lens F number), and the performance of the image sensor. For a specific performance image sensor, when the lens focal length is changed from large to small (for example, from F5.0 to F1.0), the aperture aperture becomes smaller and larger, and the camera's low illumination performance is getting better and better.

[0005] In addition, the camera's necessary image processor can also improve the camera's low illumination performance to some extent.

[0006] A camera having a continuous zoom lens includes a continuous zoom lens, an image sensor, and an image signal processor.

[0007] With the continuous advancement of the semiconductor process, the performance of the image sensor is continuously improved, and it is now possible to use the F1.4 lens and the image processor 吋, which can be clearly imaged in the low illumination environment of O.OSlux (press Ambient illumination grading standard, O.Ollux is moonlight level).

[0008] However, limited by the lens design idea and the technical conditions, the camera with continuous zoom lens The machine does not fully present the performance of the image sensor.

[0009] Currently, a video image forming apparatus is designed to provide a full focal length range to be used with a continuous zoom lens, for example, a continuous zoom lens having a focal length ranging from 4 mm to 132 mm. In this case, the ratio of the long focal length to the short focal length of the lens is 132mm/4mm = 33. With the existing technical conditions, it is impossible to ensure that the lens has the same small focal ratio at both telephoto and short focal lengths (eg , F1.0), can only achieve the lens focal length from 4mm to 132mm change, the focal ratio changes from F1.6 to F5.0.

[0010] In this case, assuming that the external ambient illumination is 100%, the amount of light entering the lens at 4 mm of short focus is 1/(1.6*1.6)

39%, the amount of light entering the telephoto 132mm is 1/(3.6*3.6) = 4<3⁄4. This means that in order to allow a sensor that can image at 0.081u X ambient illumination to be imaged at a telephoto, the ambient illumination cannot be less than 0.08L _UX /4<3⁄4 = 21u x. In other words, when the ambient illuminance is 0.081 ux and the focal length of the lens is 132 mm 吋, the illuminance transmitted to the image sensor is only 0.08*4% = 0.0032 Lux, which is much lower than the minimum imaging illuminance requirement of the image sensor, resulting in no image being seen.

[0011] As can be seen from the above example calculations, the large focal length at the long focal length is quite significant for the attenuation of ambient light, which greatly affects the performance of the sensor. This directly leads to the fact that in areas with low illumination and poor lighting conditions, the camera may not be able to see any images and lose the meaning of video image monitoring.

[0012] In order to reduce this attenuation, the following methods are usually used to compensate:

[0013] 1. Filling light with visible light or infrared light to improve ambient illumination; This method exposes the position of the camera and the direction and range of observation, so that the concealment of the camera no longer exists. The security monitoring of sensitive areas has lost its original role.

[0014] 2. Using subversive sensor technology, such as EMCCD, increases the sensitivity of the sensor hundreds of times, making the lens's attenuation of ambient illumination negligible. However, this method has increased the cost of the camera by a thousand times, far exceeding the sum of the cost of the lens and the camera under the existing process technology.

. Can not be widely used for promotion;

[0015] 3. The existing sensor is continuously improved, and the sensitivity of the sensor is appropriately increased; the speed of the improvement is slow, usually two to three times improvement after many years.

[0016] Although the various compensation methods described above have different lengths, they do not fundamentally solve the problem of the attenuation of the ambient illuminance of the continuous zoom lens, and the performance of the image sensor is still not fully reflected in the telephoto lens. technical problem

The technical problem to be solved by the present invention is to provide an apparatus and method for imaging a zoom lens such that the attenuation effect of the zoom lens on ambient illumination is reduced under a zoom lens of a wide range of focal lengths.

Problem solution

Technical solution

[0018] The technical solution adopted by the present invention to solve the technical problem thereof is: constructing a device for imaging a zoom lens, including

[0019] at least two zoom imaging units, wherein the focal lengths of the zoom imaging units are sequentially incremented, and the focal lengths of two adjacent zoom imaging units partially overlap;

[0020] a channel selector connected to the at least two zoom imaging units for selecting a signal input by at least one of the zoom imaging units as its output;

[0021] a control unit communicably connected to the zoom imaging unit and the channel selector, respectively;

[0022] the control unit is configured to control a currently imaged zoom imaging unit, a zoom imaging unit with a next stencil imaging, and a zoom imaging unit located at the current imaging and the next photographic imaging unit The focal lengths between the zoom imaging units between the focal lengths are sequentially coincident, and the channel selector is further controlled to be sequentially switched by the currently imaged zoom imaging unit as a signal input end to the zoom imaging of the next engraved imaging The unit acts as a signal input.

[0023] Preferably, the zoom imaging unit includes a zoom lens and an image sensor,

[0024] The zoom lens is configured to acquire optical imaging of a video/image, wherein a focal length of the zoom lens corresponding to each of the zoom imaging units is sequentially incremented, and a focal length of two adjacent zoom lenses is partially Coincidence

And [0025] the image sensor is connected to the zoom lens for receiving optical imaging of the video/image of the zoom lens and converted into an initial video/image electrical signal output.

[0026] Preferably, the device for imaging the zoom lens further includes an image processor,

[0027] the image processor is connected to the image sensor and the channel selector, and configured to receive the initial video/image electrical signal output by the image sensor and convert it into a set video/image standard Video image signal output;

[0028] Alternatively, the image processor is coupled to the channel selector for receiving a selection from the channel The initial video/image electrical signal of the device is converted to a video image signal output that conforms to the set video/image standard.

[0029] Preferably, the ratio of the telephoto to the short focus of the zoom lens ranges from 1 to 5.

[0030] Preferably, the control unit includes a zoom imaging control unit and a channel selector control unit,

[0031] the zoom imaging control unit is connected to the zoom imaging unit and the channel selector control unit, and is configured to control the currently imaged zoom imaging unit and the next engraved imaging zoom imaging unit, And a focal length between the zoom imaging unit between the currently imaged zoom imaging unit and the focal length of the next engraved zoom imaging unit sequentially coincides, and a selection control signal is also output to the channel selector a control unit, configured to control the channel selector control unit to select, as a signal input end, the zoom imaging unit of the currently imaged zoom imaging unit as a signal input end to sequentially switch to the next zoom imaging unit;

[0032] the channel selector control unit is connected to the zoom imaging control unit and the channel selector for receiving a selection control signal from the zoom imaging control unit to control the channel selector selection by The currently imaged zoom imaging unit is sequentially switched as a signal input to the zoom imaging unit of the next engraved imaging as a signal input.

[0033] Preferably, the zoom ratio of the zoom lens is less than or equal to F2.8.

[0034] Preferably, different zoom lenses of the zoom lens imaging device have the same or different focal ratios.

[0035] The present invention also provides an imaging method of a zoom lens, comprising the following steps:

[0036] A. determining whether the channel selector is the coincidence of the focal length of the current zoom imaging unit corresponding to the signal input end and the zoom imaging unit of the next engraved imaging, if not, executing step B, and if so, performing steps C;

[0037] B. adjusting a focal length of the intermediate zoom imaging unit that coincides with the currently imaged zoom imaging unit focal length and the focal length between the currently imaged zoom imaging unit and the next engraved imaging zoom imaging unit, and a focal length of the currently imaged zoom imaging unit such that a focal length of the intermediate zoom imaging unit coincides with a zoom imaging unit of the current engraved imaging, while controlling the channel selector to select the intermediate zoom imaging unit as a signal Input, go back to step A;

[0038] C. adjusting a focal length of the currently imaged zoom imaging unit and zoom imaging of the next engraved imaging The focal lengths of the cells coincide, and the control unit controls the channel selector to select the zoom imaging unit of the next engraved image as a signal input.

[0039] Preferably, the imaging method of the zoom lens further includes the following steps:

[0040] obtaining optical imaging of a video/image through a zoom lens;

[0041] the image sensor acquires optical imaging of the video/image and converts it into an initial video/image electrical signal

And output to the image processor;

[0042] The image processor acquires the initial video/image electrical signal and converts it into a video image signal output that conforms to a set video/image standard.

[0043] Preferably, the ratio of the telephoto to the short focus of the zoom lens ranges from 1 to 5.

Advantageous effects of the invention

Beneficial effect

[0044] The apparatus and method for implementing the zoom lens imaging of the present invention have the following beneficial effects: using at least two or more zoom imaging units to capture video or images, the focal lengths of the zoom imaging unit are sequentially incremented, and two adjacent zoom images are imaged. The focal lengths of the unit are partially overlapped, thereby ensuring that the focal length of the entire imaging device of the zoom lens is sufficiently large, and the ratio of the long focal length to the short focal length of each zoom imaging unit is small, and each zoom can be made under the prior art conditions. The imaging unit has a small focal ratio, which in turn reduces the attenuation of ambient light. The control unit controls between the currently imaged zoom imaging unit and the next stenciled zoom imaging unit, and between the zoom imaging unit between the currently imaged zoom imaging unit and the focal length of the next sculpt imaged zoom imaging unit The focal lengths are sequentially coincident, and the control channel selector is sequentially switched from the currently imaged zoom imaging unit as a signal input end to the next engraved imaging zoom imaging unit as a signal input end, so that the channel selector can be in different zoom imaging units. Switching between the two, according to actual needs, select the zoom imaging unit corresponding to the desired focal length for shooting video or image output, so that the focal length range of the zoom imaging unit is increased without increasing the attenuation of the zoom lens, that is, in the large focal length The zoom imaging unit reduces the attenuation effect of the zoom lens on the ambient illumination.

Brief description of the drawing

DRAWINGS

[0045] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

1 is a schematic structural view of a first embodiment of an apparatus for imaging a zoom lens according to the present invention; 2 is a schematic structural view of a second embodiment of an apparatus for imaging a zoom lens according to the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

[0048] The apparatus for imaging a zoom lens of the present invention includes at least two zoom imaging units, a channel selector, and a control unit.

[0049] The focal lengths of the respective zoom imaging units are sequentially incremented, and the focal lengths of the adjacent two zoom imaging units partially overlap.

[0050] The channel selector is coupled to the at least two zoom imaging units for selecting a signal input by the at least one zoom imaging unit as its output.

[0051] The control unit is communicatively coupled to the zoom imaging unit and the channel selector, respectively. The control unit is configured to control the currently imaged zoom imaging unit, the zoom imaging unit with the next stencil imaging, and the zoom imaging unit between the focal point of the currently imaged zoom imaging unit and the next stenciled zoom imaging unit The focal lengths between the two are sequentially coincident, and the control channel selector is sequentially switched from the currently imaged zoom imaging unit as a signal input end to the next zoom imaging unit of the next engraved image as a signal input end.

[0052] The zoom imaging unit includes a zoom lens and an image sensor. The zoom lens is used to acquire optical imaging of the video/image, wherein the focal lengths of the zoom lenses corresponding to the respective zoom imaging units are sequentially increased, and the focal lengths of the adjacent two zoom lenses partially overlap. The image sensor is coupled to the zoom lens for receiving optical imaging of the video/image of the zoom lens and converted to an initial video/image electrical signal output. Among them, the ratio of the telephoto to the short focus of the zoom lens is ₁ _ _5; the focal ratio of the zoom lens is less than or equal to F2.8. The zoom ratios of the different zoom lenses in the device in which the zoom lens is imaged are the same or different.

[0053] The apparatus for zoom lens imaging further includes an image processor. The image processor is coupled to the image sensor and the channel selector for receiving the initial video/image electrical signal output by the image sensor and converting it to a video image signal output that conforms to the set video image standard. Or the image processor is coupled to the channel selector for receiving the initial video/image electrical signal from the channel selector and converting to a video image signal output conforming to the set video image standard.

[0054] The control unit includes a zoom imaging control unit and a channel selector control unit. The zoom imaging control unit is coupled to the zoom imaging unit and the channel selector control unit for controlling the currently imaged zoom imaging unit and the next engraved imaging zoom imaging unit, and the currently imaged zoom imaging unit and the next image. The focal length between the zoom imaging units between the focal lengths of the imaged zoom imaging unit is sequentially coincident, and a selection control signal is also outputted to the channel selector control unit to control the channel selector control unit to select the zoom imaging unit that is currently imaged. As the signal input end, it is switched to the signal input end of the zoom imaging unit of the next engraving image.

[0055] a channel selector control unit is coupled to the zoom imaging control unit and the channel selector for receiving a selection control signal from the zoom imaging control unit to control the channel selector to select a signal input terminal of the currently imaged zoom imaging unit The zoom imaging unit of the next engraved imaging is sequentially switched as a signal input terminal.

[0056] In the first embodiment of the apparatus for imaging a zoom lens of the present invention, the apparatus for imaging the zoom lens includes at least two zoom imaging units, which are three in the present embodiment, for example, the first zoom imaging unit. 11. The second zoom imaging unit 12 and the third zoom imaging unit 13, the apparatus for imaging the zoom lens further includes a channel selector 2 and a control unit 3.

[0057] The focal lengths of the first, second, and third zoom imaging units 11, 12, 13 are sequentially incremented, and the adjacent first zoom imaging unit 11 and the focal length of the second zoom imaging unit 12 partially overlap, and the second The zoom imaging unit 12 has a partial coincidence with the focal length of the third zoom imaging unit 13. The first, second, and third zoom imaging units 11, 12, 13 respectively include first, second, and third zoom lenses 111, 121, 131, first, second, and third image sensors 112, 122, 132, and first, Second, the third image processor 113, 123, 133. The first zoom lens 111, the first image sensor 112, and the first image processor 113 are sequentially connected, and the second zoom lens 121, the second image sensor 122, and the second image processor 123 are sequentially connected, and the third zoom lens 131, the third The image sensor 132 and the third image processor 133 are sequentially connected.

[0058] The first, second, and third zoom lenses 111, 121, 131 are used to acquire optical imaging of a video/image, wherein the focal lengths of the first, second, and third zoom lenses 111, 121, 131 are sequentially incremented, and the first and second zoom lenses are sequentially increased The focal lengths between 111, 121 are partially coincident, and the focal lengths between the second and third zoom lenses 121, 131 partially overlap. The ratio of the telephoto to the short focus of the first, second, and third zoom lenses 111, 121, 131 is in the range of 1 to ₅ , and the focal ratio is less than or equal to F2.8, and the first, second, and third zoom lenses 111, 121, 131 The coke ratio is the same or different.

[0059] The focal length of the first zoom lens 111 is 4-15 mm, the focal length of the second zoom lens 121 is 14 mm-48 mm, and the focal length of the third zoom lens 131 is 44 mm-132 mm. Here, the focal length of the zoom lens refers to the focus The short focal length and long focal length of the segment are correspondingly increased.

The first, second, and third image sensors 112, 122, 132 are connected to the corresponding first, second, and third zoom lenses 111, 121, 131 for acquiring corresponding first, second, and third zoom lenses 111, 121, 131. The optical imaging is converted to an initial video/image electrical signal output.

[0061] The first, second, and third image processors 113, 123, 133 are configured to receive initial video/image electrical signals output by the corresponding first, second, and third image sensors 112, 122, 132 and convert them into set video/image standards. Video image signal output.

[0062] The channel selector 2 is connected to the corresponding first, second, and third image processors 113, 123, 133 of the first, second, and third zoom imaging units 11, 12, 13 for selecting the first, second, The input signal of at least one of the third image processors 1, 13, 123, 133 serves as its output, and the channel selector 2 can simultaneously select the corresponding ones of the first, second and third zoom imaging units 11, 12, 13 according to actual needs. 1. A plurality of input signals of the second and third image processors 113, 123, 133 serve as their outputs.

The control unit 3 is communicably connected to the first, second and third zoom imaging units 11, 12, 13 and the channel selector 2, respectively. The control unit 3 is for controlling the currently imaged zoom imaging unit, the zoom imaging unit with the next stencil imaging, and the zoom imaging unit between the focal length of the currently imaged zoom imaging unit and the next stenciled zoom imaging unit The focal lengths between the two are sequentially coincident, and the control channel selector is sequentially switched from the currently imaged zoom imaging unit as a signal input end to the next zoom imaging unit of the next engraved image as a signal input end.

The control unit 3 includes a zoom imaging control unit 31 and a channel selector control unit 32.

[0065] The zoom imaging control unit 31 is connected to the first, second and third zoom imaging units 11, 12, 13 and is connected to the channel selector control unit 32 for controlling the currently imaged zoom imaging unit and the next The focus imaging unit of the engraving image, and the focal length between the zoom imaging unit between the currently imaged zoom imaging unit and the focal length of the next engraved imaging imaging unit are sequentially coincident, and a selection control signal is also outputted to the channel The selector control unit 32 controls the channel selector 2 to select, as a signal input terminal, the zoom imaging unit of the currently imaged zoom imaging unit as a signal input end to sequentially switch to the next zoom imaging unit.

[0066] The channel selector control unit 32 is connected to the zoom imaging control unit 31 and the channel selector 2 for receiving a selection control signal from the zoom imaging control unit 31 to control the channel selector 2 to select the current imaging. The zoom imaging unit as a signal input is sequentially switched to the signal input of the zoom imaging unit of the next engraving imaging.

[0067] The workflow of the device for zoom lens imaging is as follows:

[0068] Currently, a device for engraving a zoom lens imaging needs to capture a video/image at a position of 4 mm focal length, and the zoom imaging control unit 31 controls the first zoom lens 111 to perform video/image optical imaging, and the first image sensor 112 acquires the optical imaging. And converting to the initial video/image electrical signal output to the first image processor 113, the first image processor 113 receives the initial video/image electrical signal and converts it into a video image signal output that conforms to the set video/image standard. The channel selector control unit 32 controls the channel selector 2 to take the first image processor 113 of the first zoom imaging unit 11 as a signal input terminal, and receives the video image signal output from the first image processor 113 and outputs it.

[0069] If the device for imaging the next zoom lens needs to capture a video/image at a position of 30 mm focal length, the zoom imaging control unit 31 controls the first zoom lens 111 to zoom to a corresponding long focal length of 15 mm, and simultaneously controls the second The zoom lens 121 zooms at a short focal length of 14 mm, and when the focal lengths of the first zoom lens 111 and the second zoom lens 121 coincide, the channel selector control unit 32 controls the channel selector 2 to select the second image processor 123 as a signal input terminal. Simultaneously controlling the second zoom lens 112 to adjust the focal length to a position of 30 mm for video/image optical imaging, the second image sensor 122 acquires optical imaging and converts it into an initial video/image electrical signal output to the second image processor 123, second The image processor 123 will receive the initial video/image electrical signal and convert it into a video image signal output that conforms to the set video image standard, and the channel selector 2 selects to receive the video image signal output by the second image processor 123.

[0070] If the device for imaging the next zoom lens needs to capture a video/image at a position of 130 mm focal length, after the channel selector 2 selects the second image processor 123 as a signal input terminal according to the above process, the zoom imaging control unit 31 controls the second zoom lens 121 to zoom to a corresponding long focal length of 48 mm, and simultaneously controls the third zoom lens 131 to zoom to a short focal length of 44 mm, when the focal lengths of the second zoom lens 121 and the third zoom lens 13 1 coincide, the channel selection The control unit 32 controls the channel selector 2 to select the third image processor 1 33 as a signal input terminal, and simultaneously controls the third zoom lens 132 to adjust the focal length to a position of 130 mm for video/image optical imaging, and the third image sensor 132 acquires The optical imaging is converted to an initial video/image electrical signal output to a third image processor 133, and the third image processor 133 will receive the initial video/image electrical signal and convert it into a video/image that conforms to the set video image standard. Signal output, channel selection The device 2 selects to receive the video image signal output by the third image processor 133.

[0071] Through the above-described operation mechanism of the device for imaging the zoom lens described above, for the video image observer, the continuous zoom video image output is seen, and the output video image is not different from the device equipped with a single continuous zoom lens. . The focal length configuration of each zoom lens in the unit can be optimally designed under current technical conditions. In this embodiment, it is F1.0~F1.0, which minimizes the attenuation effect of the lens on illumination. In this embodiment, the amount of light passing through both the short focal point and the telephoto can reach 1/(1*1) = 100%, that is, without any illumination loss. In this case, the excellent low illumination performance that the image sensor already has will be fully realized.

[0072] Of course, considering factors such as implementation cost, device volume, and manufacturer's own technical conditions, it is also possible to implement various factors such as F1.0~F1.2, F1.2~F1.2, F1.0~F1.4, and the like. Kind of flexible design.

[0073] In the second embodiment of the apparatus for imaging a zoom lens of the present invention shown in FIG. 2, the difference from the above-described first embodiment is that the first, second and third zoom imaging units 11, 12, 13 The first, second and third image processors 113, 123, 133 are not included, and the image processor 4 is connected to the output of the channel selector 2. The channel selector 2 is coupled to the first, second and third image sensors 11 2, 122, 132 of the first, second and third zoom imaging units, and selects at least one of the first, second and third image sensors 112, 122, 132 as signal inputs At the end, the channel selector 2 receives the initial video/image electrical signals from the first, second and third image sensors 112, 122, 132 and outputs them to the image processor 4 for conversion into video image signals.

[0074] Of course, according to actual needs, the number of zoom imaging units may also be 2, 4, 5, .

[0075] The present invention also provides an imaging method of a zoom lens, comprising the following steps:

[0076] S1. determining whether the channel selector 2 selects whether the current zoom imaging unit corresponding to the signal input end and the focal length of the next zoom imaging unit of the next engraving image overlap, if not, executing step S2, and if yes, executing Step S3. For example, if the first zoom imaging unit 11 is currently imaged and the second zoom imaging unit 12 is imaged next, the focal lengths of the first zoom imaging unit 11 and the second zoom imaging unit 12 are determined to coincide. The engraved image is the third zoom imaging unit 13, and it is judged that the focal lengths between the first imaging unit 11 and the third imaging unit 13 do not coincide.

[0077] S2. Adjusting the focal length of the intermediate zoom imaging unit that coincides with the currently imaged zoom imaging unit focal length and the focal length between the currently imaged zoom imaging unit and the next stenciled zoom imaging unit, and the current imaging zoom The focal length of the imaging unit, so that the intermediate zoom imaging unit is zoomed with the current engraved imaging The focal length of the imaging unit coincides, and the control channel selector selects the intermediate zoom imaging unit as the signal input terminal, and returns to step S1. For example, the focal length of the first zoom imaging unit 11 is first adjusted to coincide with the focal length of the second zoom imaging unit 12, and the control channel selector 2 is switched from the selection of the first zoom imaging unit 11 as a signal input to the selection of the second zoom imaging unit 12. As the signal input terminal, after returning to step S1, it is determined that the focal length of the second zoom imaging unit 12 coincides with the focal length of the third zoom imaging unit 13, and then step S3 is performed.

[0078] S3. Adjusting the focal length of the currently imaged zoom imaging unit coincides with the focal length of the zoom imaging unit of the next stencil imaging, and the control unit controls the channel selector to select the signal input terminal of the zoom imaging unit of the next stencil imaging. If the first zoom imaging unit 11 is currently imaged and the second zoom imaging unit 12 is imaged next, the control channel selector 2 is switched from selecting the first zoom imaging unit 11 as a signal input to selecting the second zoom. The imaging unit 12 serves as a signal input. If the next moment imaging is the third zoom imaging unit 13, the control channel selector 2 is switched from the selection second zoom imaging unit 12 as a signal input terminal to the selection third zoom imaging unit 13 as a signal input terminal.

[0079] The imaging method of the zoom lens further includes the following steps:

[0080] Selecting one of the first, second, and third zoom lenses 111, 112, 113 of the first, second, and third zoom imaging units 11, 12, 13 for video/image optical imaging according to a desired focal length

[0081] The image sensor acquires the optical image and converts it to an initial video/image electrical signal output to a corresponding image processor.

[0082] The image processor acquires the initial video/image electrical signal and converts it into a video image signal output that conforms to the set video image standard.

[0083] In another embodiment, the image sensor may also be optically imaged and converted into an initial video/image electrical signal output to the channel selector 2, and then the channel selector 2 outputs the initial signal to the image processor 4, The image processor 4 converts the initial video/image electrical signal into a video image signal conforming to the set video image standard and outputs it.

[0084] In summary, the video or image is captured by using at least two zoom imaging units, the focal lengths of the zoom imaging unit are sequentially incremented, and the focal lengths of the adjacent two zoom imaging units are partially overlapped, thereby ensuring the zoom lens. The focal length of the imaging device as a whole is large enough and the long focal length of each zoom imaging unit The ratio to the short focal length is small, and under the prior art conditions, each zoom imaging unit can be made to have a small focal ratio, thereby reducing the attenuation of ambient illumination.

[0085] the control unit controls the zoom imaging unit of the currently imaged zoom imaging unit and the next stencil imaging, and the zoom imaging unit between the focal length of the currently imaged zoom imaging unit and the next stenciled zoom imaging unit The focal lengths between the two are sequentially coincident, and the zoom imaging unit currently controlling the channel selector control unit is sequentially switched as a signal input end to the zoom imaging unit of the next engraved imaging as a signal input terminal, so that the channel selector can be different Switching between the zoom imaging units, selecting the zoom imaging unit corresponding to the desired focal length to capture the video image according to actual needs, and then outputting through the channel selector, so that the focal length range of the zoom imaging unit is increased without increasing the attenuation of the zoom lens. That is, the attenuation effect of the zoom lens on the ambient illuminance is reduced under the zoom imaging unit of the large-range focal length, and the existing performance of the image sensor can be realized at each focal length of the above zoom lens.

The above embodiments are merely illustrative of the preferred embodiments of the present invention, and the description thereof is more specific and detailed, but is not to be construed as limiting the scope of the invention; A person skilled in the art can freely combine the above technical features without departing from the inventive concept, and can also make several modifications and improvements, which are all within the scope of the present invention; therefore, the rights of the present invention Equivalent transformations and modifications made to the scope of the claims are intended to be included within the scope of the appended claims.

Claims

Claim

[Claim 1] A device for imaging a zoom lens, characterized in that

At least two zoom imaging units, a focal length of each of the zoom imaging units is sequentially incremented, and a focal length of two adjacent zoom imaging units partially overlaps; a channel selector connected to the at least two zoom imaging units, Selecting a signal input by at least one of the zoom imaging units as its output;

a control unit communicably coupled to the zoom imaging unit and the channel selector, respectively; the control unit is configured to control a currently imaged zoom imaging unit, a zoom imaging unit with a next stencil imaging, and the current imaging The focal length between the zoom imaging unit and the focal length between the focal lengths of the next engraved imaging imaging unit are sequentially coincident, and the channel selector is further controlled by the currently imaged zoom imaging unit The signal input end is sequentially switched to the zoom imaging unit of the next engraved image as a signal input end.

[Claim 2] The apparatus for imaging a zoom lens according to claim 1, wherein the zoom imaging unit includes a zoom lens and an image sensor,

The zoom lens is configured to acquire an optical image of a video/image, wherein a focal length of the zoom lens corresponding to each of the zoom imaging units is sequentially increased, and a focal length of two adjacent zoom lenses partially overlaps;

The image sensor is coupled to the zoom lens for receiving optical imaging of the video/image of the zoom lens and converting to an initial video/image electrical signal output.

[Claim 3] The apparatus for imaging a zoom lens according to claim 2, wherein the apparatus for imaging the zoom lens further includes an image processor,

The image processor is coupled to the image sensor and the channel selector for receiving the initial video/image electrical signal output by the image sensor and converting the video image into a video image conforming to a set video/image standard Signal output

Alternatively, the image processor is coupled to the channel selector for receiving the initial video/image electrical signal from the channel selector and converting it into a video image signal output conforming to a set video/image standard .

[Aspect 4] The apparatus for imaging a zoom lens according to claim 2 or 3, wherein a ratio of a telephoto to a short focus of the zoom lens ranges from 1 to 5.

[Claim 5] The apparatus for imaging a zoom lens according to claim 4, wherein the control unit includes a zoom imaging control unit and a channel selector control unit,

The zoom imaging control unit is coupled to the zoom imaging unit and the channel selector control unit, and configured to control the currently imaged zoom imaging unit and the next engraved imaging zoom imaging unit, and The focal lengths between the zoom imaging unit between the currently imaged zoom imaging unit and the focal length of the next stenciled zoom imaging unit are sequentially coincident, and a selection control signal is also output to the channel selector control unit, Controlling, by the channel selector control unit, a signal input end that is sequentially switched by the currently imaged zoom imaging unit as a signal input end to the zoom imaging unit of the next stencil imaging;

The channel selector control unit is coupled to the zoom imaging control unit and the channel selector for receiving a selection control signal from the zoom imaging control unit to control the channel selector selection by the current The imaged zoom imaging unit is sequentially switched as a signal input end to the zoom imaging unit of the next engraved imaging as a signal input mountain

[Claim 6] The apparatus for imaging a zoom lens according to claim 4, wherein a focal ratio of the zoom lens is less than or equal to F2.8.

[Claim 7] The apparatus for imaging a zoom lens according to claim 4, wherein a focal ratio of the different zoom lenses in the apparatus for imaging the zoom lens is the same or different.

[Attachment 8] A method of imaging a zoom lens, comprising the steps of:

A. judging whether the channel selector selects the current zoom imaging unit corresponding to the signal input end and the focal length of the next zoom imaging unit of the engraved imaging, if not, executing step B, and if yes, executing step C;

B. adjusting a focal length of the intermediate zoom imaging unit that coincides with the currently imaged zoom imaging unit focal length and the focal length between the currently imaged zoom imaging unit and the next engraved imaging zoom imaging unit, and the current The focal length of the imaged zoom imaging unit, The intermediate zoom imaging unit coincides with the focal length of the currently engraved imaging zoom imaging unit, while controlling the channel selector to select the intermediate zoom imaging unit as a signal input, returning to step A;

C. adjusting a focal length of the currently imaged zoom imaging unit to coincide with a focal length of the next engraved imaging imaging unit, the control unit controlling the channel selector to select a signal of the next engraved imaging zoom imaging unit Input.

[Claim 9] The imaging method of the zoom lens according to claim 8, wherein the imaging method of the zoom lens further comprises the following steps:

Obtaining optical imaging of the video/image through the zoom lens;

The image sensor acquires optical imaging of the video/image, converts it to an initial video/image electrical signal, and outputs it to an image processor;

The image processor acquires the initial video/image electrical signal and converts it into a video image signal output that conforms to a set video/image standard.

[Claim 10] The imaging method of the zoom lens according to claim 9, wherein a ratio of a telephoto to a short focus of the zoom lens ranges from 1 to 5.