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JPS5618711A - Device for measuring distance - Google Patents

Device for measuring distance

Info

Publication number
JPS5618711A
JPS5618711A JP9457979A JP9457979A JPS5618711A JP S5618711 A JPS5618711 A JP S5618711A JP 9457979 A JP9457979 A JP 9457979A JP 9457979 A JP9457979 A JP 9457979A JP S5618711 A JPS5618711 A JP S5618711A
Authority
JP
Japan
Prior art keywords
light
mirror
distance
slits
detection
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
JP9457979A
Other languages
Japanese (ja)
Other versions
JPS6260645B2 (en
Inventor
Yoshi Kobayakawa
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP9457979A priority Critical patent/JPS5618711A/en
Publication of JPS5618711A publication Critical patent/JPS5618711A/en
Publication of JPS6260645B2 publication Critical patent/JPS6260645B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Focusing (AREA)
  • Viewfinders (AREA)
  • Automatic Focus Adjustment (AREA)
  • Measurement Of Optical Distance (AREA)

Abstract

PURPOSE: To eliminate a drawback due to the performance of a light reception element and heighten the accuracy of distance measurement, by enabling the detection through the single light reception element of the quantities of reflected light based on two light fluxes emitted at a prescribed distance from each other.
CONSTITUTION: Light sources A1, A2 are alternately lighted on and off according to a prescribed chart. Light fluxes having passed through the slits B1, B2 of a projection mask B are condensed by a projection lens C to form a sign image on an object D. The light fluxes reflected by the object are scanned by a scanning mirror F to form an image on a detection mask H through a light reception lens G. When the set angle of the mirror F is optimal, the projected images B1', B2' of the slits B1, B2 equally cover detection slits H1, H2. For this reason, the quantity of incident light to a photoelectric converter I does not change even if the light sources A1, A2 are alternately lighted on and off. As a result, a distance can be measured by rotating the mirror F until the output signal of the converter I becomes a DC signal. The quantity of the rotation of the mirror corresponds to the distance.
COPYRIGHT: (C)1981,JPO&Japio
JP9457979A 1979-07-23 1979-07-23 Device for measuring distance Granted JPS5618711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9457979A JPS5618711A (en) 1979-07-23 1979-07-23 Device for measuring distance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9457979A JPS5618711A (en) 1979-07-23 1979-07-23 Device for measuring distance

Publications (2)

Publication Number Publication Date
JPS5618711A true JPS5618711A (en) 1981-02-21
JPS6260645B2 JPS6260645B2 (en) 1987-12-17

Family

ID=14114185

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9457979A Granted JPS5618711A (en) 1979-07-23 1979-07-23 Device for measuring distance

Country Status (1)

Country Link
JP (1) JPS5618711A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01297611A (en) * 1988-05-25 1989-11-30 Seikosha Co Ltd Light projecting method in multirange-finder
JPH0545622U (en) * 1991-11-12 1993-06-18 富士写真光機株式会社 Projector element for auto focus
RU2560996C2 (en) * 2010-07-19 2015-08-20 Дженерал Электрик Компани Measuring method based on structuring light

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0190856U (en) * 1987-11-30 1989-06-14
JPH064157U (en) * 1992-06-25 1994-01-18 株式会社オノデラ Bucket for power shovel

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5365753A (en) * 1976-11-22 1978-06-12 Toshiba Corp Proximity distance detector

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5365753A (en) * 1976-11-22 1978-06-12 Toshiba Corp Proximity distance detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01297611A (en) * 1988-05-25 1989-11-30 Seikosha Co Ltd Light projecting method in multirange-finder
JPH0545622U (en) * 1991-11-12 1993-06-18 富士写真光機株式会社 Projector element for auto focus
RU2560996C2 (en) * 2010-07-19 2015-08-20 Дженерал Электрик Компани Measuring method based on structuring light

Also Published As

Publication number Publication date
JPS6260645B2 (en) 1987-12-17

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