JPH02293615A - Range finder - Google Patents

Range finder

Info

Publication number
JPH02293615A
JPH02293615A JP11558489A JP11558489A JPH02293615A JP H02293615 A JPH02293615 A JP H02293615A JP 11558489 A JP11558489 A JP 11558489A JP 11558489 A JP11558489 A JP 11558489A JP H02293615 A JPH02293615 A JP H02293615A
Authority
JP
Japan
Prior art keywords
light
light source
distance
camera
measurement points
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
JP11558489A
Other languages
Japanese (ja)
Inventor
Masayuki Misawa
Isamu Hirai
Saburo Sugawara
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 JP11558489A priority Critical patent/JPH02293615A/en
Priority claimed from US07/509,406 external-priority patent/US5137350A/en
Publication of JPH02293615A publication Critical patent/JPH02293615A/en
Priority claimed from US07/891,954 external-priority patent/US5274429A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To accurately measure a distance without being affected by how a camera is held nor the arrangement of a subject by dividing the light beam from a light source into three vertically and moving the light source horizontally and mechanically.
CONSTITUTION: A prism 11 is arranged on the projection side of a projection lens 2 and has a surface 11A perpendicular to the optical axis of the incident light and slanting surfaces 11B and 11D. The light beam from the light source 1 is therefore split into three light beams to generate measured distances Pa, Pd, and Pb in the center and upper and lower parts in a photography range 10. Further, the light source 1 is moved by a motor in parallel to the length of a base line, so distance measurement points are formed at Pa1, Pb1, and Pd1, and Pa2, Pb2, and Pd2. Consequently, the distance measurement points are distributed in two dimensions, so the distance accurately is measured even when the camera is held longitudinally or when right and left separate subjects are arranged.
COPYRIGHT: (C)1990,JPO&Japio
JP11558489A 1989-05-09 1989-05-09 Range finder Pending JPH02293615A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11558489A JPH02293615A (en) 1989-05-09 1989-05-09 Range finder

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP11558489A JPH02293615A (en) 1989-05-09 1989-05-09 Range finder
US07/509,406 US5137350A (en) 1989-04-14 1990-04-16 Distance measuring device
US07/891,954 US5274429A (en) 1989-04-14 1992-06-01 Distance measuring device

Publications (1)

Publication Number Publication Date
JPH02293615A true JPH02293615A (en) 1990-12-04

Family

ID=14666209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11558489A Pending JPH02293615A (en) 1989-05-09 1989-05-09 Range finder

Country Status (1)

Country Link
JP (1) JPH02293615A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5426482A (en) * 1993-01-14 1995-06-20 Nikon Corporation Distance-measuring apparatus
JP2002131624A (en) * 2000-10-25 2002-05-09 Olympus Optical Co Ltd Multipoint automatic focusing camera
JP2005292165A (en) * 2004-03-31 2005-10-20 Canon Inc Projector
JP2015129742A (en) * 2013-12-04 2015-07-16 オプテックス株式会社 Active type object detection sensor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5426482A (en) * 1993-01-14 1995-06-20 Nikon Corporation Distance-measuring apparatus
JP2002131624A (en) * 2000-10-25 2002-05-09 Olympus Optical Co Ltd Multipoint automatic focusing camera
JP2005292165A (en) * 2004-03-31 2005-10-20 Canon Inc Projector
JP4646540B2 (en) * 2004-03-31 2011-03-09 キヤノン株式会社 projector
JP2015129742A (en) * 2013-12-04 2015-07-16 オプテックス株式会社 Active type object detection sensor

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