CA2544600A1 - Proximity detector - Google Patents

Proximity detector Download PDF

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Publication number
CA2544600A1
CA2544600A1 CA002544600A CA2544600A CA2544600A1 CA 2544600 A1 CA2544600 A1 CA 2544600A1 CA 002544600 A CA002544600 A CA 002544600A CA 2544600 A CA2544600 A CA 2544600A CA 2544600 A1 CA2544600 A1 CA 2544600A1
Authority
CA
Canada
Prior art keywords
light
light source
proximity
reference object
target object
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002544600A
Other languages
French (fr)
Other versions
CA2544600C (en
Inventor
Tormod Njoelstad
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
New Index AS
Original Assignee
New Index As
Tormod Njoelstad
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by New Index As, Tormod Njoelstad filed Critical New Index As
Publication of CA2544600A1 publication Critical patent/CA2544600A1/en
Application granted granted Critical
Publication of CA2544600C publication Critical patent/CA2544600C/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J1/00—Photometry, e.g. photographic exposure meter
    • G01J1/02—Details
    • G01J1/04—Optical or mechanical part supplementary adjustable parts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B11/00—Measuring arrangements characterised by the use of optical techniques
    • G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
    • G01B11/026—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by measuring distance between sensor and object
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
    • G01C3/00—Measuring distances in line of sight; Optical rangefinders
    • G01C3/02—Details
    • G01C3/06—Use of electric means to obtain final indication
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
    • G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
    • G01S17/04—Systems determining the presence of a target
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
    • G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
    • G01S7/481—Constructional features, e.g. arrangements of optical elements
    • G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver

Abstract

Apparatus for detecting proximity between a first object (target object) and a second object (reference object), comprising a light source (1) and a light detector (3) adapted to receive resulting back-scattered light from the reference object when illuminated from the light source (1), whereby the intensity of hack~scattered light to the light detector (3) is utilized as a measure of said proximity. The target object (2) comprises an optical device (4) having a focal plane (7) and being adapted to be illuminated by the light source (1). The axes of the light rays from the light source (1) and the back-scattering to the light detector (3) have mutually closely adjacent and substantially parallel or coincident portions. Said proximity corresponds to a distance (relative position) between the target object (2) and the reference object (6, 8) wherein the reference object is located substantially at the focal plane.

Claims (12)

1. Apparatus for detecting proximity between a first object (target object) and a second object (reference object), comprising a light source (1) and a light detector (3) adapted to receive resulting back-scattered light from the reference object when illuminated from the light source (1), whereby the intensity of back-scattered light to the light detector (3) is utilized as a measure of said proximity, characterized in that the target object (2) comprises an optical device (4) having a focal plane (7) and being adapted to be illuminated by the light source (1), that the axes of the light rays from the light source (1) and the back-scattering to the light detector (3) have mutually closely adjacent and substantially parallel or coincident portions, and that said proximity corresponds to a spacing (relative position) between the target object (2) and the reference object (6,8) wherein the reference object is located substantially at the focal plane.
2. Apparatus according to claim 1, wherein the light source (1) and/or the light detector (3) are/is located on the target object (2).
3. Apparatus according to claim 1 or 2, wherein said axes outside said portions have deviating directions, such as by using mirrors, optical fibres or light conductors.
4. Apparatus according to claims 1, 2 or 3, wherein the light source (1) is adapted to emit modulated or possibly pulsed light, and the light detector (3) is synchronized with such modulation or pulsing.
5. Apparatus according to any one of claims 1-4, wherein the light detector comprises a camera (3).
6. Apparatus according to any one of claims 1-5, wherein the optical device (4) has at least two focal planes for determination of said proximity in at least two relative positions of the target object (2) and the reference object (6, 8).
7. Apparatus according to any one of claims 1-6, wherein the intensity of back-scattered light to the light detector (3) is compared with a predetermined and preferably adjustable level, for detection of said proximity.
8. Apparatus according to any one of claims 1-7, wherein the light source (1) and the light detector (3) are located separately in relation to one another.
9. Apparatus according to any one of claims 1-8, wherein the light source consists of a data projector (Fig. 2).
10. Drawing, writing and/or pointing tool for data presentation, computer-supported work or interactive operations with a computer, wherein an apparatus according to any one of claims 1-9 is incorporated in the tool.
11. Apparatus for detecting proximity between a first object (target object) and a second object (reference object), comprising a light source (1) and a receiver for resulting back-scattered light from the reference object when illuminated from the light source (1), whereby the intensity of back-scattered light to the receiver is utilized as a measure of said proximity, characterized in that the target object (2) comprises an optical device (4) having a focal plane (7) and being adapted to be illuminated by the light source (1), that the axes of the light rays from the light source (1) and back-scattering to the receiver have mutually closely adjacent and substantially parallel or coincident portions, that said proximity corresponds to a distance (relative position) between the target object (2) and the reference object (6,8) wherein the reference object is located substantially at the focal plane, and that the receiver is adapted to cooperate with an eye belonging to a user of the apparatus.
12. Apparatus according to claim 11, wherein the light source consists of a data projector.
CA2544600A 2003-11-19 2004-11-12 Proximity detector Expired - Fee Related CA2544600C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
NO20035142 2003-11-19
NO20035142A NO320062B1 (en) 2003-11-19 2003-11-19 Device for detecting proximity between a first object (template object) and another object (reference object), as well as drawing, writing and / or pointing tools for data presentation etc.
PCT/NO2004/000347 WO2005050130A1 (en) 2003-11-19 2004-11-12 Proximity detector

Publications (2)

Publication Number Publication Date
CA2544600A1 true CA2544600A1 (en) 2005-06-02
CA2544600C CA2544600C (en) 2011-09-13

Family

ID=30439575

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2544600A Expired - Fee Related CA2544600C (en) 2003-11-19 2004-11-12 Proximity detector

Country Status (9)

Country Link
US (1) US7339684B2 (en)
EP (2) EP1692459B1 (en)
JP (2) JP4832311B2 (en)
KR (1) KR101109966B1 (en)
CN (1) CN100437025C (en)
AU (1) AU2004291813B2 (en)
CA (1) CA2544600C (en)
NO (1) NO320062B1 (en)
WO (1) WO2005050130A1 (en)

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US7978091B2 (en) * 2006-08-24 2011-07-12 Navisense Method and device for a touchless interface
US8421642B1 (en) 2006-08-24 2013-04-16 Navisense System and method for sensorized user interface
US7961173B2 (en) * 2006-09-05 2011-06-14 Navisense Method and apparatus for touchless calibration
US8316324B2 (en) * 2006-09-05 2012-11-20 Navisense Method and apparatus for touchless control of a device
US8354997B2 (en) * 2006-10-31 2013-01-15 Navisense Touchless user interface for a mobile device
US8904312B2 (en) * 2006-11-09 2014-12-02 Navisense Method and device for touchless signing and recognition
US8793621B2 (en) * 2006-11-09 2014-07-29 Navisense Method and device to control touchless recognition
US8060841B2 (en) * 2007-03-19 2011-11-15 Navisense Method and device for touchless media searching
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Also Published As

Publication number Publication date
AU2004291813B2 (en) 2009-05-14
JP2011141296A (en) 2011-07-21
JP5461470B2 (en) 2014-04-02
US20070127039A1 (en) 2007-06-07
NO20035142D0 (en) 2003-11-19
AU2004291813A1 (en) 2005-06-02
EP1692459B1 (en) 2017-03-15
WO2005050130A1 (en) 2005-06-02
CA2544600C (en) 2011-09-13
CN100437025C (en) 2008-11-26
JP2007514144A (en) 2007-05-31
KR101109966B1 (en) 2012-02-24
CN1882820A (en) 2006-12-20
NO20035142L (en) 2005-05-20
NO320062B1 (en) 2005-10-17
US7339684B2 (en) 2008-03-04
KR20060111482A (en) 2006-10-27
EP2472218A1 (en) 2012-07-04
EP1692459A1 (en) 2006-08-23
JP4832311B2 (en) 2011-12-07

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Effective date: 20181113