JPS5456390A - Light detecting method - Google Patents
Light detecting methodInfo
- Publication number
- JPS5456390A JPS5456390A JP12244777A JP12244777A JPS5456390A JP S5456390 A JPS5456390 A JP S5456390A JP 12244777 A JP12244777 A JP 12244777A JP 12244777 A JP12244777 A JP 12244777A JP S5456390 A JPS5456390 A JP S5456390A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- photo detector
- light
- shielded
- generating circuit
- 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)
- Solid State Image Pick-Up Elements (AREA)
Abstract
PURPOSE: To make possible entirely electrically accurate optical zero level processing by holding one out of the photo detector array formed on a substrate shielded of light and removing noise components from the outputs of other elements by using the output thereof.
CONSTITUTION: One photo detector out of a photo detector array is held shielded of light and pulse signal 31 is applied to a self-scanning type image sensor 10 being the photo detector as the light shielded element by a clock pulse generating circuit 30. Start pulse signal 33 is applied thereto in a start pulse generating circuit 32 synchronized to the clock pulses. The signal 35 for holding the optical zero level signal having been detected with the sensor 10 by 1 measurement cycle is generated in a pulse generating circuit 34. From the output signal of the photo detector, the light shielded element output signal is operated in an arithmetic circuit 40, the output signal 41 whereof is then converted to the digital signal suited for outputting in an A/D converter 42. Thereby, the electrically accurate optical zero level processing may be performed without using any mechanical light intermitting mechanism system
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12244777A JPS5456390A (en) | 1977-10-14 | 1977-10-14 | Light detecting method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12244777A JPS5456390A (en) | 1977-10-14 | 1977-10-14 | Light detecting method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5456390A true JPS5456390A (en) | 1979-05-07 |
Family
ID=14836060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12244777A Pending JPS5456390A (en) | 1977-10-14 | 1977-10-14 | Light detecting method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5456390A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58158528A (en) * | 1982-03-16 | 1983-09-20 | Union Giken:Kk | Light measuring device |
JPS59202035A (en) * | 1983-04-30 | 1984-11-15 | Matsushita Electric Works Ltd | Current-voltage conversion circuit for light input |
JPS6057222A (en) * | 1983-09-09 | 1985-04-03 | Chino Works Ltd | Optical measuring device |
-
1977
- 1977-10-14 JP JP12244777A patent/JPS5456390A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58158528A (en) * | 1982-03-16 | 1983-09-20 | Union Giken:Kk | Light measuring device |
JPS59202035A (en) * | 1983-04-30 | 1984-11-15 | Matsushita Electric Works Ltd | Current-voltage conversion circuit for light input |
JPS6057222A (en) * | 1983-09-09 | 1985-04-03 | Chino Works Ltd | Optical measuring device |
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