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GB0622354D0 - Self-mixing laser sensor - Google Patents

Self-mixing laser sensor

Info

Publication number
GB0622354D0
GB0622354D0 GBGB0622354.9A GB0622354A GB0622354D0 GB 0622354 D0 GB0622354 D0 GB 0622354D0 GB 0622354 A GB0622354 A GB 0622354A GB 0622354 D0 GB0622354 D0 GB 0622354D0
Authority
GB
United Kingdom
Prior art keywords
output
laser
target surface
sensor
self
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.)
Withdrawn
Application number
GBGB0622354.9A
Other versions
GB2443662A (en
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.)
Firecomms Ltd
Original Assignee
Firecomms Ltd
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 Firecomms Ltd filed Critical Firecomms Ltd
Priority to GB0622354A priority Critical patent/GB2443662A/en
Publication of GB0622354D0 publication Critical patent/GB0622354D0/en
Priority to PCT/EP2007/009575 priority patent/WO2008055640A1/en
Publication of GB2443662A publication Critical patent/GB2443662A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • 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
    • G01S17/50—Systems of measurement based on relative movement of target
    • G01S17/58—Velocity or trajectory determination systems; Sense-of-movement determination systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/36—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light
    • G01P3/366—Devices characterised by the use of optical means, e.g. using infrared, visible, or ultraviolet light by using diffraction of light
    • 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
    • G01S17/06—Systems determining position data of a target
    • G01S17/08—Systems determining position data of a target for measuring distance only
    • G01S17/32—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated
    • G01S17/34—Systems determining position data of a target for measuring distance only using transmission of continuous waves, whether amplitude-, frequency-, or phase-modulated, or unmodulated using transmission of continuous, frequency-modulated waves while heterodyning the received signal, or a signal derived therefrom, with a locally-generated signal related to the contemporaneously transmitted signal
    • 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
    • G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
    • 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
    • G01S7/491—Details of non-pulse systems
    • G01S7/4912—Receivers
    • G01S7/4916—Receivers using self-mixing in the laser cavity
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • G06F3/0423—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen using sweeping light beams, e.g. using rotating or vibrating mirror

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Optics & Photonics (AREA)
  • Optical Radar Systems And Details Thereof (AREA)
  • Length Measuring Devices By Optical Means (AREA)

Abstract

A velocimeter uses a self-mixing laser sensor. The laser 20 (e.g. a VCSEL) has an optical cavity (resonator) with an optical output face and a beam splitter (e.g. a distributed Bragg grating) integrated into the laser's output face. The beam splitter provides at least two output beams from the output face. One output beam 12 is used as a probe beam directed to a target surface 13 external to the sensor via a window 19. This is reflected by the target and mixed with the transmitted light In the laser cavity. A second output beam 15 is amplitude modulated by the Doppler shift of the reflected light and is used as a monitor beam directed to an optical detector 16 which measures the laser output power. From the measured output power, motion of the target surface relative to the sensor is determined. The transmitted light may be FMCW in order to find the range of the target surface. Four (fig. 5A, 6) or three (fig. 10, 11) beams allow measurement of movement in two directions. The velocimeter may be used to sense movement of a finger on a touch-pad (fig. 14).
GB0622354A 2006-11-09 2006-11-09 Laser motion detector Withdrawn GB2443662A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0622354A GB2443662A (en) 2006-11-09 2006-11-09 Laser motion detector
PCT/EP2007/009575 WO2008055640A1 (en) 2006-11-09 2007-11-05 Self-mixing laser sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0622354A GB2443662A (en) 2006-11-09 2006-11-09 Laser motion detector

Publications (2)

Publication Number Publication Date
GB0622354D0 true GB0622354D0 (en) 2006-12-20
GB2443662A GB2443662A (en) 2008-05-14

Family

ID=37594623

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0622354A Withdrawn GB2443662A (en) 2006-11-09 2006-11-09 Laser motion detector

Country Status (2)

Country Link
GB (1) GB2443662A (en)
WO (1) WO2008055640A1 (en)

Families Citing this family (20)

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EP2108962A3 (en) * 2008-04-11 2011-12-28 Continental Teves AG & Co. oHG Device and method for calculating the speed of an athlete
WO2009153699A1 (en) * 2008-06-18 2009-12-23 Philips Intellectual Property & Standards Gmbh Driver assistance system
ATE542107T1 (en) * 2008-07-07 2012-02-15 Koninkl Philips Electronics Nv SELF-MIXING LASER MEASUREMENT DEVICE
KR101731273B1 (en) * 2009-03-31 2017-05-11 코닌클리케 필립스 엔.브이. Method and device for detecting motion
FR2951275B1 (en) * 2009-10-09 2012-11-02 Epsiline DEVICE FOR MEASURING WIND SPEED
DE102013203211A1 (en) 2012-06-15 2013-12-19 Dr. Johannes Heidenhain Gmbh Device for interferential distance measurement
EP3035001B1 (en) * 2014-12-16 2017-08-16 SICK STEGMANN GmbH Device and method for determining the absolute position of a moving object
CN110300884B (en) * 2016-12-09 2022-03-29 通快光电器件有限公司 Optical particle sensor module
CN111133641A (en) * 2017-02-24 2020-05-08 普林斯顿光电子公司 Eye-safe VCSEL illuminator package
US11740071B2 (en) * 2018-12-21 2023-08-29 Apple Inc. Optical interferometry proximity sensor with temperature variation compensation
US11156456B2 (en) 2019-05-21 2021-10-26 Apple Inc. Optical proximity sensor integrated into a camera module for an electronic device
US11473898B2 (en) 2019-05-24 2022-10-18 Apple Inc. Wearable voice-induced vibration or silent gesture sensor
US11422638B2 (en) 2019-07-08 2022-08-23 Apple Inc. Input devices that use self-mixing interferometry to determine movement within an enclosure
US11409365B2 (en) 2019-09-06 2022-08-09 Apple Inc. Self-mixing interferometry-based gesture input system including a wearable or handheld device
US11419546B2 (en) 2019-09-24 2022-08-23 Apple Inc. Wearable self-mixing interferometry device used to sense physiological conditions
DE102021108372A1 (en) 2020-04-30 2021-11-04 Ifm Electronic Gmbh Distance measurement system with a VCSEL array
US11874110B2 (en) 2020-09-25 2024-01-16 Apple Inc. Self-mixing interferometry device configured for non-reciprocal sensing
EP4083567B1 (en) * 2021-04-30 2024-06-12 TRUMPF Photonic Components GmbH Laser sensor, system and method for self-mixing interferometry
US12209890B2 (en) 2022-03-31 2025-01-28 Apple Inc. Optical sensor module including an interferometric sensor and extended depth of focus optics
CN116255910B (en) * 2022-12-15 2024-07-23 同济大学 Self-mixing metrology type displacement measurement device and method based on self-traceable grating

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Publication number Priority date Publication date Assignee Title
JPH1051067A (en) * 1996-04-29 1998-02-20 Motorola Inc Reflection type power monitoring system for vertical cavity surface emission laser
US5838439A (en) * 1997-03-14 1998-11-17 Zang; De Yu Heterodyned self-mixing laser diode vibrometer
US6233045B1 (en) * 1998-05-18 2001-05-15 Light Works Llc Self-mixing sensor apparatus and method
WO2000013051A1 (en) * 1998-08-31 2000-03-09 Digital Optics Corporation Diffractive vertical cavity surface emitting laser power monitor and system
DE60141704D1 (en) * 2000-11-06 2010-05-12 Koninkl Philips Electronics Nv METHOD FOR MEASURING THE MOVEMENT OF AN INPUT DEVICE
KR101224358B1 (en) * 2004-04-29 2013-01-21 코닌클리케 필립스 일렉트로닉스 엔.브이. Relative movement sensor and method for measuring movement of an object and said sensor relative to each other, sheet sensor, apparatus for processing sheet material and input device
CN1333258C (en) * 2004-06-25 2007-08-22 清华大学 Self-mixed intervention Doppler velometer based on two-frequency laser
US7286581B2 (en) * 2004-08-20 2007-10-23 Avago Technologies Fiber Ip (Singapore) Pte Ltd Self-monitoring light emitting apparatus
US7126586B2 (en) * 2004-09-17 2006-10-24 Microsoft Corporation Data input devices and methods for detecting movement of a tracking surface by detecting laser doppler self-mixing effects of a frequency modulated laser light beam
TWI263035B (en) * 2005-01-18 2006-10-01 Darfon Electronics Corp Optical movement sensing module and its optical movement sensor

Also Published As

Publication number Publication date
GB2443662A (en) 2008-05-14
WO2008055640A1 (en) 2008-05-15

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