JPS5629111A - Distance measuring unit - Google Patents
Distance measuring unitInfo
- 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
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
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)
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 |
-
1979
- 1979-08-16 JP JP10479779A patent/JPS5629111A/en active Granted
Cited By (5)
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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