JPS6474484A - Light wave distance measuring instrument - Google Patents

Light wave distance measuring instrument

Info

Publication number
JPS6474484A
JPS6474484A JP23338887A JP23338887A JPS6474484A JP S6474484 A JPS6474484 A JP S6474484A JP 23338887 A JP23338887 A JP 23338887A JP 23338887 A JP23338887 A JP 23338887A JP S6474484 A JPS6474484 A JP S6474484A
Authority
JP
Japan
Prior art keywords
luminous flux
optical path
distance measurement
light
coherent
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
JP23338887A
Other languages
Japanese (ja)
Other versions
JP2509246B2 (en
Inventor
Takashi Yokokura
Nobuo Hori
Hiroaki Shimozono
Satoru Niimura
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.)
Topcon Corp
Original Assignee
Topcon Corp
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 Topcon Corp filed Critical Topcon Corp
Priority to JP23338887A priority Critical patent/JP2509246B2/en
Priority to US07/228,649 priority patent/US4986653A/en
Publication of JPS6474484A publication Critical patent/JPS6474484A/en
Application granted granted Critical
Publication of JP2509246B2 publication Critical patent/JP2509246B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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  • Automatic Focus Adjustment (AREA)
  • Optical Radar Systems And Details Thereof (AREA)

Abstract

PURPOSE:To obtain the small-sized, stable, and high-reliability light wave range finder while eliminating a mechanical operation part by forming a distance measurement optical system as an optical integrated circuit. CONSTITUTION:Coherent luminous flux which is modulated in terms of intensity by a optical intensity modulation part 7 is switched by an optical path switching part 8 between an external distance measurement optical path Pr and a reference optical path Pm. The quantity of coherent luminous flux guided to the external distance measurement optical path Pr is adjusted by a 1st light quantity adjustment part 9. Coherent luminous flux from the 1st light quantity adjustment part 9 is sent out to an object through a 1st converging grating coupler (FGC) 11. Then reflected luminous flux from the object is received by a 2nd FGC 12. Further, coherent luminous flux guided to the reference optical path Pm has its quantity adjusted by a 2nd light quantity adjustment part 10 and is multiplexed with the sent light. Then the distance to the object is measured according to the phase of the reflected luminous flux.
JP23338887A 1987-08-11 1987-09-17 Lightwave rangefinder Expired - Lifetime JP2509246B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP23338887A JP2509246B2 (en) 1987-09-17 1987-09-17 Lightwave rangefinder
US07/228,649 US4986653A (en) 1987-08-11 1988-08-05 Light wave range finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23338887A JP2509246B2 (en) 1987-09-17 1987-09-17 Lightwave rangefinder

Publications (2)

Publication Number Publication Date
JPS6474484A true JPS6474484A (en) 1989-03-20
JP2509246B2 JP2509246B2 (en) 1996-06-19

Family

ID=16954311

Family Applications (1)

Application Number Title Priority Date Filing Date
JP23338887A Expired - Lifetime JP2509246B2 (en) 1987-08-11 1987-09-17 Lightwave rangefinder

Country Status (1)

Country Link
JP (1) JP2509246B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6465078B1 (en) 1997-01-23 2002-10-15 Daicel Chemical Industries, Ltd. Recording sheet with an ink absorbing layer
JP2021089307A (en) * 2019-12-02 2021-06-10 株式会社豊田中央研究所 Projected/received light optical system and optical device
JP2021107817A (en) * 2017-03-31 2021-07-29 ベロダイン ライダー ユーエスエー，インコーポレイテッド Integrated lidar illumination power control

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6465078B1 (en) 1997-01-23 2002-10-15 Daicel Chemical Industries, Ltd. Recording sheet with an ink absorbing layer
JP2021107817A (en) * 2017-03-31 2021-07-29 ベロダイン ライダー ユーエスエー，インコーポレイテッド Integrated lidar illumination power control
JP2021089307A (en) * 2019-12-02 2021-06-10 株式会社豊田中央研究所 Projected/received light optical system and optical device

Also Published As

Publication number Publication date
JP2509246B2 (en) 1996-06-19

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