JPS5531939A - Measuring circuit for photo amount - Google Patents
Measuring circuit for photo amountInfo
- Publication number
- JPS5531939A JPS5531939A JP10512278A JP10512278A JPS5531939A JP S5531939 A JPS5531939 A JP S5531939A JP 10512278 A JP10512278 A JP 10512278A JP 10512278 A JP10512278 A JP 10512278A JP S5531939 A JPS5531939 A JP S5531939A
- Authority
- JP
- Japan
- Prior art keywords
- light flux
- output
- amplifier
- integration
- fed
- 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
- 230000004907 flux Effects 0.000 abstract 5
- 230000010354 integration Effects 0.000 abstract 4
- 239000003990 capacitor Substances 0.000 abstract 2
- 230000003321 amplification Effects 0.000 abstract 1
- 238000003199 nucleic acid amplification method Methods 0.000 abstract 1
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
- G01J1/46—Electric circuits using a capacitor
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
PURPOSE:To measure the relation between the first and second light flux without any operational processing, by using the integration circuit having the memory circuit storing until the time when the integration of light flux reaches a given value. CONSTITUTION:The differential amplifier A1 forms the integration circuit consisting of the capacitor C1 and integration control switch S1, and the photo diode Pd is connected between the differential input terminals. The output of A1 is fed to the amplifier A2 of unity amplification factor via the switch S4 and it is displayed on DIPS. Further, the output of A1 is fed to the amplifier A3 forming a comparator, the output of A3 is fed to the control circuit CONT which controls the memory amplifier A4. When light flux alpha is incident to Pd, CONT is driven, and when V1 reaches the reference voltage V3, the output of A3 stores the capacitor C3 the time when the voltage is from V1 to V3. Next, V1 is retutned on zero and CONT is driven after selecting the light flux from alpha to beta, and the light flux beta is displayed on DIPS by integrating it by the said memory time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10512278A JPS5921491B2 (en) | 1978-08-29 | 1978-08-29 | Light amount measurement circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10512278A JPS5921491B2 (en) | 1978-08-29 | 1978-08-29 | Light amount measurement circuit |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5531939A true JPS5531939A (en) | 1980-03-06 |
JPS5921491B2 JPS5921491B2 (en) | 1984-05-21 |
Family
ID=14398987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10512278A Expired JPS5921491B2 (en) | 1978-08-29 | 1978-08-29 | Light amount measurement circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5921491B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5885139A (en) * | 1981-11-17 | 1983-05-21 | Toshiba Corp | Spectroscopic analysis apparatus |
US4580321A (en) * | 1984-06-13 | 1986-04-08 | Yoshida Kogyo K. K. | Fluid-tight slide fastener |
-
1978
- 1978-08-29 JP JP10512278A patent/JPS5921491B2/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5885139A (en) * | 1981-11-17 | 1983-05-21 | Toshiba Corp | Spectroscopic analysis apparatus |
JPH0143900B2 (en) * | 1981-11-17 | 1989-09-25 | Tokyo Shibaura Electric Co | |
US4580321A (en) * | 1984-06-13 | 1986-04-08 | Yoshida Kogyo K. K. | Fluid-tight slide fastener |
Also Published As
Publication number | Publication date |
---|---|
JPS5921491B2 (en) | 1984-05-21 |
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