WO2000019884A1 - Apparatus for examining a patient by means of light - Google Patents
Apparatus for examining a patient by means of light Download PDFInfo
- Publication number
- WO2000019884A1 WO2000019884A1 PCT/DK1999/000519 DK9900519W WO0019884A1 WO 2000019884 A1 WO2000019884 A1 WO 2000019884A1 DK 9900519 W DK9900519 W DK 9900519W WO 0019884 A1 WO0019884 A1 WO 0019884A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light emitting
- emitting means
- light
- temperature increase
- normal operation
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/24—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth
- A61B1/247—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor for the mouth, i.e. stomatoscopes, e.g. with tongue depressors; Instruments for opening or keeping open the mouth with means for viewing areas outside the direct line of sight, e.g. dentists' mirrors
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B1/00—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor
- A61B1/06—Instruments for performing medical examinations of the interior of cavities or tubes of the body by visual or photographical inspection, e.g. endoscopes; Illuminating arrangements therefor with illuminating arrangements
- A61B1/0661—Endoscope light sources
- A61B1/0669—Endoscope light sources at proximal end of an endoscope
Definitions
- the present invention relates to an apparatus for analysing and/or preparing an object.
- the present invention relates to an apparatus for analysing and/or preparing one or more objects in the human body.
- the apparatus used for the analysis comprises a variety of analysing means so as to obtain maximum information about the object and to save time.
- the analysing apparatus in addition to the analysing means, comprises e.g. illumination means so as to facilitate analysis of an object in a dark environment.
- a dark environment could be hollow spaces in the human body, e.g. oral cavity or rectum.
- Analysing the human body puts specific requirements to the temperature stability of the analysing apparatus, since heating of the human tissue must be controllable.
- a halogen lamb is positioned in the base of the shaft of a handheld instrument so as to generate white light with high intensity.
- the light is guided through a transparent shaft.
- the light is scattered in a defuse manner so as to generate light in the oral cavity.
- Another system developed for the dental care industry includes an optical fibre which has been mounted in the shaft. White light emitted by a halogen lamb is coupled into the fibre at a remote location.
- a disadvantage of both halogen-based systems is the high power consumption of the halogen lamb.
- a further disadvantage of both halogen-based systems is the limited lifetime of the halogen lamb. The lifetime may be significantly reduced if the halogen lamb is accidentally supplied with a voltage level which is higher than the nominal voltage of the halogen lamb.
- a still further disadvantage of both halogen-based systems is the effect of de-gassing of the glass constituting the halogen lambs.
- Such a de-gassing effect in a halogen lamb typically modifies the emission properties due to a change in the optical transmission properties of the glass whereby the spectral components of the emitted light are modified accordingly.
- a still further disadvantage of the halogen lamb based systems is the fact that upon illumination of an object using a halogen lamb, the filament in the halogen lamb may be projected onto the object. Such a projection of the filament will disturb the analysis of the object.
- a still further disadvantage of the halogen-based system is the fact that handling of the halogen lambs is rather difficult.
- the present invention relates to a solution of the above-mentioned problems.
- the present invention relates to an apparatus for analysing an object, the apparatus comprising:
- a holder being adapted to be positioned inside the movable shaft at normal operation
- one or more light emitting means being held in position by the holder, said light emitting means emitting light in a predetermined direction
- the light emitting means of the apparatus may in principle be chosen arbitrary with the visible range (from 400 nm to 800 nm).
- the light emitting means may be alight emitting device (LED) or a solid state laser, such as a semiconductor laser diode.
- the light emitting properties of the light emitting means may be improved by including a reflector means positioned adjacent to the light emitting means. By improving is meant that the directivity may be enhanced.
- the reflector means may be mounted on the holder. Since a LED and a laser diode are direct light sources without filaments, problems relating to projection of filaments onto the object are completely avoided. Further, LEDs and laser diodes are generally not sensitive to handling. Even further, LEDs and laser diodes are both suitable for autoclaving. It is an advantage that the shaft of the apparatus may be autoclaved.
- the temperature increase of the light emitting means during normal operation does not exceed 10 °C.
- the temperature increase of the light emitting means does not exceed 8 °C, more preferably the temperature increase does not exceed 6 °C, more preferably the temperature increase does not exceed 4 °C, more preferably the temperature increase does not exceed 2 °C and even more preferably the temperature increase is less than 1 °C.
- the apparatus further comprises means for directing the emitted light towards the object.
- the directing means may comprise a movable holder and a reflective member.
- the movable holder may be capable of positioning the reflective member so that the emitted light either hits or passes by the reflective member.
- the movable holder further acts as a holder for mounting the reflective member.
- the reflective member may be a mirror having at least one reflective surface.
- the longitudinal axis of the movable shaft and a normal to the reflective surface of the mirror defines an angle ⁇ , wherein ⁇ is in the range from 0 to 90 degrees, preferably in the range from 20 to 70 degrees, more preferably in the range from 40 to 50 degrees, more preferably in the range from 42 to 48 degrees, more preferably in the range from 44 to 46 degrees, such as approximately 45 degrees.
- the present invention relates to an apparatus for preparing an object, the apparatus comprising: - a movable shaft,
- a holder being adapted to be positioned inside the movable shaft at normal operation
- one or more light emitting means being held in position by the holder, said light emitting means emitting light in a predetermined direction
- the light emitting means of the apparatus may in principle be chosen arbitrary with the visible range (from 400 nm to 800 nm).
- the light emitting means may be alight emitting device (LED) or a solid state laser, such as a semiconductor laser diode.
- the temperature increase of the light emitting means during normal operation does not exceed 10 °C.
- the temperature increase of the light emitting means does not exceed 8 °C, more preferably the temperature increase does not exceed 6 °C, more preferably the temperature increase does not exceed 4 °C, more preferably the temperature increase does not exceed 2 °C and even more preferably the temperature increase is less than 1 °C.
- the apparatus further comprises means for preparing the object.
- the preparing means may comprise a motor, such as a direct current motor (DC-motor) or an alternating current motor (AC-motor).
- DC-motor direct current motor
- AC-motor alternating current motor
- the motor may be a brush-less motor.
- the motor may drive a drill, brush etc.
- Fig. 1 shows a top/side view of the first aspect of the present invention
- Fig. 2 shows a side view of a part of the first aspect of the present invention
- Fig. 3 shows a top view of the holder and the light emitting means according to the first aspect of the present invention.
- Fig. 3 shows means for improving the light emitting properties of the light emitting means
- Fig. 4 shows a top/side view of the movable shaft, the movable holder and the reflective member according to the present invention, where the reflective member is positioned in the light path of the emitted light, and
- Fig. 5 shows a top/side view of the movable shaft, the movable holder and the reflective member according to the present invention, where the reflective member is positioned so that the emitted light passes by the reflective member.
- FIG. 1 an apparatus according to the first aspect of the present invention is shown.
- the apparatus shown in Fig. 1 is adapted for being used in the area of dental care.
- Fig. 1 shows an apparatus comprising a movable shaft 1 and a base 4 for holding the movable shaft.
- the apparatus further comprises a movable holder 2 and a reflective member 3.
- the reflective member 3 is mounted in the movable holder 2.
- the movable holder 2 is mounted on the movable shaft 1.
- the reflective member 3 is a mirror.
- the movable shaft may be manufactured from an autoclavable material, such as a metal, such as aluminium, or from a synthetic material, such a plastic.
- Fig. 2 is a side view of the apparatus shown in Fig. 1 where the movable shaft has been removed.
- the light emitting means 6 is being held in position by the holder 5.
- the holder 5 is fixed to the base 4 of the apparatus.
- the position of the light emitting means 6 leads to the important effect, that the light emitting means 6 is at least partly introduced into the body of the patient during the analyses of a given object - e.g. teeth.
- the light emitting means is a LED emitting light at a plurality of wavelengths between 400 nm and 800 nm.
- the LED may be of the type White Discrete LED from the company Marl Optosource.
- Fig. 3 is a top/side view of the apparatus according to the first aspect of the present invention.
- a reflector means 7 has been positioned adjacent to the light emitting means 6.
- the reflector means 7 is preferably mounted on the holder 5.
- Fig. 4 is a top/side view of the movable shaft 1 according to the first aspect of the present invention.
- Fig. 4 shows the movable shaft 1 , the movable holder 2 and the reflective member 3 (mirror).
- the reflective member 3 is positioned so as to direct the emitted light towards the object - e.g. in the light path of the emitted light.
- Fig. 5 is a top/side view of the movable shaft 1 according to the first aspect of the present invention.
- the reflective member 3 is positioned so that the emitted light passes by the reflective member.
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99970008A EP1117325A1 (en) | 1998-10-01 | 1999-10-01 | Apparatus for examining a patient by means of light |
AU59682/99A AU5968299A (en) | 1998-10-01 | 1999-10-01 | Apparatus for examining a patient by means of light |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA199801244 | 1998-10-01 | ||
DKPA199801244 | 1998-10-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000019884A1 true WO2000019884A1 (en) | 2000-04-13 |
Family
ID=8102641
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DK1999/000519 WO2000019884A1 (en) | 1998-10-01 | 1999-10-01 | Apparatus for examining a patient by means of light |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1117325A1 (en) |
AU (1) | AU5968299A (en) |
WO (1) | WO2000019884A1 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1553963A (en) * | 1967-12-07 | 1969-01-17 | ||
WO1980000300A1 (en) * | 1978-08-09 | 1980-03-06 | Thornton J | Optical inspection instrument |
DE19640495A1 (en) * | 1996-10-01 | 1998-04-09 | Leica Lasertechnik | Device for confocal surface measurement |
-
1999
- 1999-10-01 EP EP99970008A patent/EP1117325A1/en not_active Withdrawn
- 1999-10-01 AU AU59682/99A patent/AU5968299A/en not_active Abandoned
- 1999-10-01 WO PCT/DK1999/000519 patent/WO2000019884A1/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1553963A (en) * | 1967-12-07 | 1969-01-17 | ||
WO1980000300A1 (en) * | 1978-08-09 | 1980-03-06 | Thornton J | Optical inspection instrument |
DE19640495A1 (en) * | 1996-10-01 | 1998-04-09 | Leica Lasertechnik | Device for confocal surface measurement |
Also Published As
Publication number | Publication date |
---|---|
AU5968299A (en) | 2000-04-26 |
EP1117325A1 (en) | 2001-07-25 |
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