JPS54128363A - Distance detector - Google Patents

Distance detector

Info

Publication number
JPS54128363A
JPS54128363A JP3629978A JP3629978A JPS54128363A JP S54128363 A JPS54128363 A JP S54128363A JP 3629978 A JP3629978 A JP 3629978A JP 3629978 A JP3629978 A JP 3629978A JP S54128363 A JPS54128363 A JP S54128363A
Authority
JP
Japan
Prior art keywords
photo detectors
distance
photo
light
arrayed
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
JP3629978A
Other languages
Japanese (ja)
Other versions
JPS624689B2 (en
Inventor
Motonobu Matsuda
Toru Matsui
Yasuhiro Nanba
Yoshihiro Tanaka
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.)
Minolta Co Ltd
Original Assignee
Minolta 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 Minolta Co Ltd filed Critical Minolta Co Ltd
Priority to JP3629978A priority Critical patent/JPS54128363A/en
Priority to US06/018,053 priority patent/US4251144A/en
Priority to DE19792909090 priority patent/DE2909090A1/en
Publication of JPS54128363A publication Critical patent/JPS54128363A/en
Publication of JPS624689B2 publication Critical patent/JPS624689B2/ja
Granted legal-status Critical Current

Links

Landscapes

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

Abstract

PURPOSE: To provide an inexpensive distance measuring device which is capable of discriminating the specified distance zones even with a miniature optical system of relatively low accuracy by providing a circuit which performs distance discrimination when a plurality of photo detectors received the reflected light image from the measuring target.
CONSTITUTION: At the time of distance detection, a light source 8 emits light for a short time and radiates light to the object through a projection lens 9. The reflected image from the object is received in an image forming lens 10 and is formed on the photo detecting surface of the plural photo detectors 11 arrayed in array form. E.g., four pieces of photo detectors 11a thru 11d are arrayed to the photo detectors and are so arranged that the adjoining three photo detectors receive light simultaneously. A distance pattern 101 being comb-tooth form electrodes corresponding to the distance zones which the photo detectors receive light is printed on an electrode substrate 100 and is slided with contact piece 102 moving integrally with a photographing lens 1. The pulses from the respective photo detectors 11 are led to the logic circuits consisting of AND, NOT circuits, etc. and the signal indicating the zone of the measuring target is emitted through combination of each photo detector, by which the photographing lens 1 is stopped in the positin corresponding to that distance.
COPYRIGHT: (C)1979,JPO&Japio
JP3629978A 1978-03-08 1978-03-28 Distance detector Granted JPS54128363A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP3629978A JPS54128363A (en) 1978-03-28 1978-03-28 Distance detector
US06/018,053 US4251144A (en) 1978-03-08 1979-03-06 Rangefinding system
DE19792909090 DE2909090A1 (en) 1978-03-08 1979-03-08 DISTANCE MEASURING SYSTEM

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3629978A JPS54128363A (en) 1978-03-28 1978-03-28 Distance detector

Publications (2)

Publication Number Publication Date
JPS54128363A true JPS54128363A (en) 1979-10-04
JPS624689B2 JPS624689B2 (en) 1987-01-31

Family

ID=12465927

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3629978A Granted JPS54128363A (en) 1978-03-08 1978-03-28 Distance detector

Country Status (1)

Country Link
JP (1) JPS54128363A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5681824A (en) * 1979-12-10 1981-07-04 Minolta Camera Co Ltd Data imprinting device of camera
JPS59129838A (en) * 1983-01-17 1984-07-26 Canon Inc Automatic focus photographing device
JPS6080812A (en) * 1983-10-11 1985-05-08 Canon Inc Motor-driven variable focus camera

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019469A (en) * 1973-06-18 1975-02-28
JPS51120247A (en) * 1975-04-14 1976-10-21 Kyocera Corp A range finder

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5019469A (en) * 1973-06-18 1975-02-28
JPS51120247A (en) * 1975-04-14 1976-10-21 Kyocera Corp A range finder

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5681824A (en) * 1979-12-10 1981-07-04 Minolta Camera Co Ltd Data imprinting device of camera
JPS6255644B2 (en) * 1979-12-10 1987-11-20 Minolta Camera Kk
JPS59129838A (en) * 1983-01-17 1984-07-26 Canon Inc Automatic focus photographing device
JPS6080812A (en) * 1983-10-11 1985-05-08 Canon Inc Motor-driven variable focus camera
JPH0211122B2 (en) * 1983-10-11 1990-03-13 Canon Kk

Also Published As

Publication number Publication date
JPS624689B2 (en) 1987-01-31

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