CN2899373Y - Light-source stabilizer - Google Patents
Light-source stabilizer Download PDFInfo
- Publication number
- CN2899373Y CN2899373Y CN 200620069695 CN200620069695U CN2899373Y CN 2899373 Y CN2899373 Y CN 2899373Y CN 200620069695 CN200620069695 CN 200620069695 CN 200620069695 U CN200620069695 U CN 200620069695U CN 2899373 Y CN2899373 Y CN 2899373Y
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- CN
- China
- Prior art keywords
- amplifier
- current
- light
- light source
- output
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- 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.)
- Expired - Fee Related
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Abstract
The utility model discloses a light-source stabilizer, comprising a light-electricity converter, a voltage amplifier and a current amplifier. The light-electricity converter is adjacent to a light source, the output port of the light-electricity converter is connected to the input port of the voltage amplifier, and the output port of the voltage amplifier is connected to the current amplifier, meanwhile, the output current feedback of the current amplifier is connected to the constant-current power supply circuit for the light source. The utility model can test the fluctuation of the light source at any time and feed the signal back to the constant-current power supply circuit to give a light source of constant intensity. Furthermore, the optical device can adopt a constant light source signal, so the sensitivity and accuracy of the optical device are enhanced.
Description
Technical field
The utility model relates to light stability device used in a kind of optical instrument.
Background technology
The general constant-current source that adopts promotes light source in optical instrument at present, but because the drift of light, the instability of light intensity and the interference of ambient light etc. make optical instrument all have the unsettled phenomenon of reading, be difficult to the result of accurate sense analysis, bring inconvenience to the analyst.
Summary of the invention
The utility model provides a kind of light stability device, and it can detect the fluctuation of light source at any time, and with the constant-current source circuit of this signal feedback to light source, makes light source be in same luminous intensity all the time.
The utility model is achieved in that a kind of light stability device, it comprises optical-electrical converter, voltage amplifier and current amplifier, optical-electrical converter and light source are adjacent, the output of optical-electrical converter is connected with the voltage amplifier input, the output of voltage amplifier links to each other with the input of current amplifier, and the output current of current amplifier feeds back to the light source constant-current source circuit.
Described optical-electrical converter is photodiode or phototriode VP; Described voltage amplifier is a differential amplifier, and an input of differential amplifier is connected with the output of optical-electrical converter, and another input of differential amplifier is connected with power supply by resistance; Described current amplifier is made up of triode BG1 and BG2, and the collector electrode of two triodes is connected with power supply, and the emitter-base bandgap grading output line of triode BG1 is connected with the base stage incoming line of triode BG2.
After adopting technique scheme, convert light signal to the signal of telecommunication by optical-electrical converter, at any time detect the pairing signal of telecommunication of light intensity, this signal of telecommunication zooms into current signal through differential amplifier, current amplifier, this current signal is fed back to control circuit for light source, make light source be in same luminous intensity all the time, optical instrument just can be gathered a constant light source signal, the drift of instrument is just very little, bring great convenience to the analyst, can read accurate analytical results, improve the sensitivity and the accuracy of instrument.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
With reference to accompanying drawing, a kind of light stability device of the utility model, it is mainly by optical-electrical converter, and voltage amplifier and current amplifier are formed.Optical-electrical converter can be phototriode VP or photodiode, and it is arranged on the light source next door.The leg of phototriode VP is connected with power Vcc by resistance R 1, and its another leg is connected with ground wire by adjustable resistance R2.Voltage amplifier is a differential amplifier, and it is made of operational amplifier OP07.The adjustable end of adjustable electric group R2 is connected with the negative input end of operational amplifier by resistance R 3, the positive input terminal of operational amplifier is connected with power supply+V by resistance R 5, cross-over connection has resistance R 4 and capacitor C between the negative input end of operational amplifier and the output, resistance R 4 and capacitor C parallel connection.The output of operational amplifier is connected with the input of current amplifier.Current amplifier is made up of triode BG1 and BG2, and the collector electrode of two triodes is connected with power Vcc, and the emitter-base bandgap grading output line of triode BG1 is connected with the base stage incoming line of triode BG2.The output current that amplifies through current amplifier feeds back to the constant-current source circuit of light source, makes light source be in same luminous intensity all the time.
Claims (4)
1, a kind of light stability device, it is characterized in that it comprises optical-electrical converter, voltage amplifier and current amplifier, optical-electrical converter and light source are adjacent, the output of optical-electrical converter is connected with the voltage amplifier input, the output of voltage amplifier links to each other with the input of current amplifier, and the output current of current amplifier feeds back to the constant-current source circuit of light source.
2, light stability device according to claim 1 is characterized in that described optical-electrical converter is photodiode or phototriode VP.
3, light stability device according to claim 1, it is characterized in that described voltage amplifier is a differential amplifier, one input of differential amplifier is connected with the output of optical-electrical converter, and another input of differential amplifier is connected with power supply by resistance R 5.
4, light stability device according to claim 1, it is characterized in that described current amplifier is made up of triode BG1 and BG2, the collector electrode of two triodes is connected with power supply, and the emitter-base bandgap grading output line of triode BG1 is connected with the base stage incoming line of triode BG2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620069695 CN2899373Y (en) | 2006-02-28 | 2006-02-28 | Light-source stabilizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620069695 CN2899373Y (en) | 2006-02-28 | 2006-02-28 | Light-source stabilizer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2899373Y true CN2899373Y (en) | 2007-05-09 |
Family
ID=38074702
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620069695 Expired - Fee Related CN2899373Y (en) | 2006-02-28 | 2006-02-28 | Light-source stabilizer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2899373Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104769354A (en) * | 2012-08-17 | 2015-07-08 | Trw汽车美国有限责任公司 | Method and apparatus to control light intensity as voltage fluctuates |
| CN107147438A (en) * | 2016-09-19 | 2017-09-08 | 国家电网公司 | A kind of portable fiber-optic tester |
-
2006
- 2006-02-28 CN CN 200620069695 patent/CN2899373Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104769354A (en) * | 2012-08-17 | 2015-07-08 | Trw汽车美国有限责任公司 | Method and apparatus to control light intensity as voltage fluctuates |
| CN107147438A (en) * | 2016-09-19 | 2017-09-08 | 国家电网公司 | A kind of portable fiber-optic tester |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070509 |