JPS5629216A - Instantaneous photodetecting circuit - Google Patents
Instantaneous photodetecting circuitInfo
- Publication number
- JPS5629216A JPS5629216A JP10479579A JP10479579A JPS5629216A JP S5629216 A JPS5629216 A JP S5629216A JP 10479579 A JP10479579 A JP 10479579A JP 10479579 A JP10479579 A JP 10479579A JP S5629216 A JPS5629216 A JP S5629216A
- Authority
- JP
- Japan
- Prior art keywords
- steady light
- passage
- photocurrent
- pulse
- light
- 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)
Abstract
PURPOSE: To make possible the detection of instantaneous light without being affected by the intensity of steady light by providing an electric current control circuit allowing the passage of only the photocurrent of the steady light and an electric current circuit receiving pulse-form photocurrent.
CONSTITUTION: An electric current control circuit is formed by a transistor TR31, a buffer circuit 33 for negative feedback and a capacitor 34 for delaying and allows the passage of only the steady light from a photoelectric element 30. Now, when the pulse-form photocurrent superposed on the steady light from the element 30 inputs, the TR31 allows the passage of the steady light but blocks the passage of the pulse- form photocurrent. Hence, the pulse-form photocurrent is supplied to the base of the TR35 in which constant current is flowed by a constant current source 36. As a result, the impulse-form photocurrent is taken out as the collector current amplified by the TR35 irrespective of the intensity of the steady light. In this way, the instantaneous light may be taken out.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10479579A JPS5629216A (en) | 1979-08-16 | 1979-08-16 | Instantaneous photodetecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10479579A JPS5629216A (en) | 1979-08-16 | 1979-08-16 | Instantaneous photodetecting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5629216A true JPS5629216A (en) | 1981-03-24 |
| JPS6230363B2 JPS6230363B2 (en) | 1987-07-02 |
Family
ID=14390372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10479579A Granted JPS5629216A (en) | 1979-08-16 | 1979-08-16 | Instantaneous photodetecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5629216A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59151013A (en) * | 1983-02-18 | 1984-08-29 | Ricoh Co Ltd | Distance detecting device |
| US4573694A (en) * | 1983-03-30 | 1986-03-04 | Nissan Shatai Company, Limited | Fuel filler system for an automotive vehicle |
| JPS61254832A (en) * | 1985-05-04 | 1986-11-12 | プロトン・アクチエンゲゼルシヤフト | Sample sampler |
| JPS64426A (en) * | 1986-10-16 | 1989-01-05 | Philips Gloeilampenfab:Nv | Device for deciding optical path of pulsed light beam passing through atmosphere |
| JPH03102210A (en) * | 1990-04-27 | 1991-04-26 | Seikosha Co Ltd | Projecting-type distance measuring apparatus |
-
1979
- 1979-08-16 JP JP10479579A patent/JPS5629216A/en active Granted
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59151013A (en) * | 1983-02-18 | 1984-08-29 | Ricoh Co Ltd | Distance detecting device |
| US4573694A (en) * | 1983-03-30 | 1986-03-04 | Nissan Shatai Company, Limited | Fuel filler system for an automotive vehicle |
| JPS61254832A (en) * | 1985-05-04 | 1986-11-12 | プロトン・アクチエンゲゼルシヤフト | Sample sampler |
| JPS64426A (en) * | 1986-10-16 | 1989-01-05 | Philips Gloeilampenfab:Nv | Device for deciding optical path of pulsed light beam passing through atmosphere |
| JPH03102210A (en) * | 1990-04-27 | 1991-04-26 | Seikosha Co Ltd | Projecting-type distance measuring apparatus |
| JPH0439015B2 (en) * | 1990-04-27 | 1992-06-26 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6230363B2 (en) | 1987-07-02 |
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