JPS56122922A - Detection system for light wavelength - Google Patents
Detection system for light wavelengthInfo
- Publication number
- JPS56122922A JPS56122922A JP2595480A JP2595480A JPS56122922A JP S56122922 A JPS56122922 A JP S56122922A JP 2595480 A JP2595480 A JP 2595480A JP 2595480 A JP2595480 A JP 2595480A JP S56122922 A JPS56122922 A JP S56122922A
- Authority
- JP
- Japan
- Prior art keywords
- photodetectors
- outputs
- light wavelength
- short
- vcob
- 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
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
- G01J9/00—Measuring optical phase difference; Determining degree of coherence; Measuring optical wavelength
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Spectrometry And Color Measurement (AREA)
Abstract
PURPOSE:To facilitate the signal processing and display, by obtaining a light wavelength as a digital value on the basis of short-circuit current ratios of two photodetectors where spectral sensibility characteristics are different from each other and short-circuit current ratios correspond to light wavelength in 1:1. CONSTITUTION:Short-circuit currents outputted from photodetectors PDa and PDb are given to voltage control oscillators VCOa and VCOb through amplifiers Aa and Ab, and outputs of oscillators VCOa and VCOb are inputted to frequency dividers Diva and Divb. Timing generator TPG generates the timing for sampling, and counter CT counts the number of pulses of a short period generated correspondingly to outputs of photodetectors which are included in the time of the pulse width of long-period pulses generated correspondingly to outputs of photodetectors. Outputs of two photodetectors are compared with each other by comparator COMP, and an address of read-only memory ROM is designated by the counting value of counter CT and the output of comparator COMP, thereby obtaining light wavelength information.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2595480A JPS56122922A (en) | 1980-03-01 | 1980-03-01 | Detection system for light wavelength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2595480A JPS56122922A (en) | 1980-03-01 | 1980-03-01 | Detection system for light wavelength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS56122922A true JPS56122922A (en) | 1981-09-26 |
Family
ID=12180145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2595480A Pending JPS56122922A (en) | 1980-03-01 | 1980-03-01 | Detection system for light wavelength |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56122922A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61105431A (en) * | 1984-08-10 | 1986-05-23 | ユルゲン・ザイデンベルク | Method and device for measuring beam wavelength and wavelength compensating beam output from monochromatic beam source |
-
1980
- 1980-03-01 JP JP2595480A patent/JPS56122922A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61105431A (en) * | 1984-08-10 | 1986-05-23 | ユルゲン・ザイデンベルク | Method and device for measuring beam wavelength and wavelength compensating beam output from monochromatic beam source |
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