JPS6280511A - Optical system for range finding - Google Patents

Optical system for range finding

Info

Publication number
JPS6280511A
JPS6280511A JP22046785A JP22046785A JPS6280511A JP S6280511 A JPS6280511 A JP S6280511A JP 22046785 A JP22046785 A JP 22046785A JP 22046785 A JP22046785 A JP 22046785A JP S6280511 A JPS6280511 A JP S6280511A
Authority
JP
Japan
Prior art keywords
lens
projection
optical
spot
sensor
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
JP22046785A
Other languages
Japanese (ja)
Inventor
Shigeo Toushi
Original Assignee
Asahi 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 Asahi Optical Co Ltd filed Critical Asahi Optical Co Ltd
Priority to JP22046785A priority Critical patent/JPS6280511A/en
Publication of JPS6280511A publication Critical patent/JPS6280511A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To simplify the constitution of an optical system by projecting spot light from a position at specific distance laterally from the optical axis of a photographic lens and photodetecting reflected light from an object through the photographic lens.
CONSTITUTION: The projection optical system composed of a projection lens 11, etc., projects spot light from the position at distance laterally from the optical axis of photography and the direction of the projection is changed associatively with the forward/backward movement of the photographic lens 16. A two-division photodetector 15 consists of photodetecting element A and B and is arranged on a surface substantially equivalent to the image pickup surface of the lens 16. Consequently, the projection spot from the lens 11 is reflected by the object and incident on the lens 16. This incident light forms a photodetection spot image P on the sensor 15 through a mirror 18, etc. Then, the outputs of the elements A and B, etc., of the sensor 15 are compared with each other by an arithmetic circuit 50; when there is an output difference, the lens 16 is moved and put in focus and the projection system is associated 22 and 24 to move the spot light reflected by the object on the surface of the sensor 15 so that the outputs of the elements A and B coincide with each other. When both outputs coincide with each other, an in-focus state is decided.
COPYRIGHT: (C)1987,JPO&Japio
JP22046785A 1985-10-04 1985-10-04 Optical system for range finding Pending JPS6280511A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22046785A JPS6280511A (en) 1985-10-04 1985-10-04 Optical system for range finding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22046785A JPS6280511A (en) 1985-10-04 1985-10-04 Optical system for range finding

Publications (1)

Publication Number Publication Date
JPS6280511A true JPS6280511A (en) 1987-04-14

Family

ID=16751572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22046785A Pending JPS6280511A (en) 1985-10-04 1985-10-04 Optical system for range finding

Country Status (1)

Country Link
JP (1) JPS6280511A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013136825A1 (en) * 2012-03-15 2013-09-19 オムロン株式会社 Reflective light sensor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013136825A1 (en) * 2012-03-15 2013-09-19 オムロン株式会社 Reflective light sensor
JP2013195079A (en) * 2012-03-15 2013-09-30 Omron Corp Reflective optical sensor

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