JPS5629111A - Distance measuring unit - Google Patents

Distance measuring unit

Info

Publication number
JPS5629111A
JPS5629111A JP10479779A JP10479779A JPS5629111A JP S5629111 A JPS5629111 A JP S5629111A JP 10479779 A JP10479779 A JP 10479779A JP 10479779 A JP10479779 A JP 10479779A JP S5629111 A JPS5629111 A JP S5629111A
Authority
JP
Japan
Prior art keywords
light
load
pulsive
transistor
detecting
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
JP10479779A
Other languages
Japanese (ja)
Other versions
JPS6215123B2 (en
Inventor
Motonobu Matsuda
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 JP10479779A priority Critical patent/JPS5629111A/en
Priority to US06/176,635 priority patent/US4288152A/en
Priority to DE19803030635 priority patent/DE3030635A1/en
Publication of JPS5629111A publication Critical patent/JPS5629111A/en
Publication of JPS6215123B2 publication Critical patent/JPS6215123B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Automatic Focus Adjustment (AREA)
  • Length Measuring Devices By Optical Means (AREA)
  • Measurement Of Optical Distance (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)
  • Focusing (AREA)
  • Viewfinders (AREA)

Abstract

PURPOSE: To enable the operation at low voltage power supply, by converting the current signal separating and detecting the pulsive light mixed in the stationary light into the voltage in logarithmic compression, in detecting the distance from the reflection light of pulsive light beam.
CONSTITUTION: The photoelectric conversion circuit of light beam projection system used for the automatic focus adjuster for cameras, is formed with the 1st current control circuit consisting of the photoelectric element 30 and transistor 31, and the 2nd current control circuit including the transistor 35, and to the output, the 1st load consisting of the transistor 47 as the load and the 2nd load consisting of transistors 48W50 forming the logarithmic compression circuit, are connected. Accordingly, the current according to the incident intensity of pulsive light is bypassed, and the voltage signal in logarithmic relation can be output from the 2nd load, and the pulsive light is separated and the operation by the low voltage source is made.
COPYRIGHT: (C)1981,JPO&Japio
JP10479779A 1979-08-16 1979-08-16 Distance measuring unit Granted JPS5629111A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP10479779A JPS5629111A (en) 1979-08-16 1979-08-16 Distance measuring unit
US06/176,635 US4288152A (en) 1979-08-16 1980-08-08 Automatic range finder system
DE19803030635 DE3030635A1 (en) 1979-08-16 1980-08-13 AUTOMATIC DISTANCE METER FOR A CAMERA

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10479779A JPS5629111A (en) 1979-08-16 1979-08-16 Distance measuring unit

Publications (2)

Publication Number Publication Date
JPS5629111A true JPS5629111A (en) 1981-03-23
JPS6215123B2 JPS6215123B2 (en) 1987-04-06

Family

ID=14390427

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10479779A Granted JPS5629111A (en) 1979-08-16 1979-08-16 Distance measuring unit

Country Status (1)

Country Link
JP (1) JPS5629111A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110361U (en) * 1983-01-14 1984-07-25 トヨタ自動車株式会社 Device for improving high temperature startability of internal combustion engines
JPS64426A (en) * 1986-10-16 1989-01-05 Philips Gloeilampenfab:Nv Device for deciding optical path of pulsed light beam passing through atmosphere
JPH0430251U (en) * 1990-06-30 1992-03-11
JPH0666076A (en) * 1992-08-17 1994-03-08 Mitsui Constr Co Ltd Drilling device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59110361U (en) * 1983-01-14 1984-07-25 トヨタ自動車株式会社 Device for improving high temperature startability of internal combustion engines
JPS6341561Y2 (en) * 1983-01-14 1988-11-01
JPS64426A (en) * 1986-10-16 1989-01-05 Philips Gloeilampenfab:Nv Device for deciding optical path of pulsed light beam passing through atmosphere
JPH0430251U (en) * 1990-06-30 1992-03-11
JPH0666076A (en) * 1992-08-17 1994-03-08 Mitsui Constr Co Ltd Drilling device

Also Published As

Publication number Publication date
JPS6215123B2 (en) 1987-04-06

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