JPS6473228A - Light quantity detecting device - Google Patents
Light quantity detecting deviceInfo
- Publication number
- JPS6473228A JPS6473228A JP23131987A JP23131987A JPS6473228A JP S6473228 A JPS6473228 A JP S6473228A JP 23131987 A JP23131987 A JP 23131987A JP 23131987 A JP23131987 A JP 23131987A JP S6473228 A JPS6473228 A JP S6473228A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- gain
- unit
- section
- output
- 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.)
- Pending
Links
Landscapes
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
PURPOSE:To make it possible to detect the size of the light quantity with good accuracy, by forming a detecting device of a structure utilizing an amplifier circuit employing a gain outputting circuit. CONSTITUTION:A light from a light emitting section 9 is received by a light receiving section 1. An output signal of the light receiving section 1 is inputted to an amplifier section 2. The signal inputted to the amplifier section 2 is amplified in a first half stage amplifier unit 3 to be supplied into a gain controlling unit 4 having a gain reduction characteristic by which the amplification degree can be changed corresponding to an output of a gain outputting unit 7. The frequency of an optical signal to be used is selected in a band-pass filter 5. Thereafter, the signal is sent to a wave detecting unit 6 for converting the signal to be an output of the gain outputting unit 7. The signal is, passing through the gain outputting unit 7 from which it is returned back to the gain controlling unit 4 as the output of the gain outputting unit 7, inputted to a comparing section 8. The comparing section 8 outputs a signal corresponding to the light quantity.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23131987A JPS6473228A (en) | 1987-09-16 | 1987-09-16 | Light quantity detecting device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP23131987A JPS6473228A (en) | 1987-09-16 | 1987-09-16 | Light quantity detecting device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6473228A true JPS6473228A (en) | 1989-03-17 |
Family
ID=16921770
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP23131987A Pending JPS6473228A (en) | 1987-09-16 | 1987-09-16 | Light quantity detecting device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6473228A (en) |
-
1987
- 1987-09-16 JP JP23131987A patent/JPS6473228A/en active Pending
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