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JPS57197415A - Range finder - Google Patents

Range finder

Info

Publication number
JPS57197415A
JPS57197415A JP8098681A JP8098681A JPS57197415A JP S57197415 A JPS57197415 A JP S57197415A JP 8098681 A JP8098681 A JP 8098681A JP 8098681 A JP8098681 A JP 8098681A JP S57197415 A JPS57197415 A JP S57197415A
Authority
JP
Japan
Prior art keywords
photodetector
distance
lens
signal
position detector
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.)
Pending
Application number
JP8098681A
Other languages
Japanese (ja)
Inventor
Masane Suzuki
Kiyoshi Suzuki
Kenji Yasuda
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.)
Fujinon Corp
Original Assignee
Fujinon Corp
Fuji Photo Optical Co 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 Fujinon Corp, Fuji Photo Optical Co Ltd filed Critical Fujinon Corp
Priority to JP8098681A priority Critical patent/JPS57197415A/en
Publication of JPS57197415A publication Critical patent/JPS57197415A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • G01C3/24—Measuring distances in line of sight; Optical rangefinders using a parallactic triangle with fixed angles and a base of variable length in the observation station, e.g. in the instrument

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Measurement Of Optical Distance (AREA)
  • Automatic Focus Adjustment (AREA)

Abstract

PURPOSE:To obtain a small-sized device with short base line length, by providing an image forming optical system for illuminating light on an optical path almost in parallel with the base line, and locating a image forming optical system for reflecting light and a photodetector on an optical path of a reflecting light from an object to be measured. CONSTITUTION:When a scanning mirror 11 is moved, since the focus of a collimator lens 15 is changed, a point P is formed on a photodetector 17 with a lens 16 by moving left the lens 15 by D1. The collimator lens 15 can be servo- controlled in the same way as the lens 4 by regarding an output signal of a position detector 12 as an objective value. Servo control is made for a scanning mirror 11 with a signal of a photodetector 17 and when the image of a point P is coincident with an optical axis Z4, a coincidence signal is outputted from the photodetector 17 and the range signal of the position detector 12 is read with this coincidence signal. The distance D of the scanning mirror 11 from the origin is D=D0+D1, a distance L from a base line Z3 to the point P is L=D0+D1, and since the value D0 is known in advance, the distance L can be obtained by obtaining the distance D1 with the position detector 12.
JP8098681A 1981-05-29 1981-05-29 Range finder Pending JPS57197415A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8098681A JPS57197415A (en) 1981-05-29 1981-05-29 Range finder

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8098681A JPS57197415A (en) 1981-05-29 1981-05-29 Range finder

Publications (1)

Publication Number Publication Date
JPS57197415A true JPS57197415A (en) 1982-12-03

Family

ID=13733816

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8098681A Pending JPS57197415A (en) 1981-05-29 1981-05-29 Range finder

Country Status (1)

Country Link
JP (1) JPS57197415A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618892A1 (en) * 1987-07-31 1989-02-03 Garages Multiservices Francais Method and device for distance measurement
US10746604B2 (en) * 2017-06-05 2020-08-18 University Of Electronic Science And Technology Of China Apparatus for measuring temperature of aero-engine turbine blades

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2618892A1 (en) * 1987-07-31 1989-02-03 Garages Multiservices Francais Method and device for distance measurement
US10746604B2 (en) * 2017-06-05 2020-08-18 University Of Electronic Science And Technology Of China Apparatus for measuring temperature of aero-engine turbine blades

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