JPS5526459A - Sensitivity correction circuit of photoelectric element - Google Patents
Sensitivity correction circuit of photoelectric elementInfo
- Publication number
- JPS5526459A JPS5526459A JP9951578A JP9951578A JPS5526459A JP S5526459 A JPS5526459 A JP S5526459A JP 9951578 A JP9951578 A JP 9951578A JP 9951578 A JP9951578 A JP 9951578A JP S5526459 A JPS5526459 A JP S5526459A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- converted
- current
- analogue
- sensitivity
- 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
- 230000035945 sensitivity Effects 0.000 title abstract 4
- 238000001514 detection method Methods 0.000 abstract 2
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Measurement Of Radiation (AREA)
- Nuclear Medicine (AREA)
Abstract
PURPOSE:To make it possible to correct automatically a photoelectric element with a high precision in a simple circuit constitution by storing sensitivity differences among plural photoelectric elements as digital signals and converting them to analogue signals and feeding back these analogue signals. CONSTITUTION:Photoelectric elements 1 and 2 which detected detection light 3 having the same light quantity convert detection light 3 to currents I1 and I2 respectively, and these currents are converted to voltages V1 and V2 by voltage- current converter circuits 4 and 5, and difference voltage V3 between them is obtained by voltage differential amplifier 6. This voltage is converted to digital signals and is stored in storage circuit 8 as information of sensitivity error by sensitivity correction start signal 11. This information is converted to analogue voltage V4 and is converted to current I3 by current-voltage converter circuit 10; however, relation I3=I2-I1 is obtained by arranging conditions of respective circuits. Then, when this current is fed back, I1+(I2-I1)=I2 is true, thus correcting lement 1 for element 2.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9951578A JPS5945087B2 (en) | 1978-08-17 | 1978-08-17 | Photoelectric element sensitivity correction circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9951578A JPS5945087B2 (en) | 1978-08-17 | 1978-08-17 | Photoelectric element sensitivity correction circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5526459A true JPS5526459A (en) | 1980-02-25 |
JPS5945087B2 JPS5945087B2 (en) | 1984-11-02 |
Family
ID=14249380
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9951578A Expired JPS5945087B2 (en) | 1978-08-17 | 1978-08-17 | Photoelectric element sensitivity correction circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5945087B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5759184A (en) * | 1980-09-27 | 1982-04-09 | Hitachi Medical Corp | Scintilallation camera |
JPS5847223A (en) * | 1981-09-17 | 1983-03-18 | Ricoh Co Ltd | Method and device for correcting sensitivity of solid state sensor |
JPS61105477A (en) * | 1984-10-29 | 1986-05-23 | Nec Corp | Laser light warning device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS61170488A (en) * | 1985-01-25 | 1986-08-01 | 太刀川 紀男 | Bobbin thread feed mechanism of sewing machine |
-
1978
- 1978-08-17 JP JP9951578A patent/JPS5945087B2/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5759184A (en) * | 1980-09-27 | 1982-04-09 | Hitachi Medical Corp | Scintilallation camera |
JPS5847223A (en) * | 1981-09-17 | 1983-03-18 | Ricoh Co Ltd | Method and device for correcting sensitivity of solid state sensor |
JPS6314887B2 (en) * | 1981-09-17 | 1988-04-02 | Ricoh Kk | |
JPS61105477A (en) * | 1984-10-29 | 1986-05-23 | Nec Corp | Laser light warning device |
JPH045352B2 (en) * | 1984-10-29 | 1992-01-31 |
Also Published As
Publication number | Publication date |
---|---|
JPS5945087B2 (en) | 1984-11-02 |
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