CN204905211U - Light electric signal transition device - Google Patents
Light electric signal transition device Download PDFInfo
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- CN204905211U CN204905211U CN201520394912.1U CN201520394912U CN204905211U CN 204905211 U CN204905211 U CN 204905211U CN 201520394912 U CN201520394912 U CN 201520394912U CN 204905211 U CN204905211 U CN 204905211U
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- conversion device
- signal conversion
- photoelectric signal
- electric signal
- transition device
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Abstract
The utility model relates to a light electric signal transition device, light electric signal transition device include input window (1), photocathode (2), focusing electrode (3), the electron multiplication utmost point (4) and positive pole (5), positive pole (5) set up on terminal dynode (6), according to the incident direction of incident light (9), have set gradually input window (1), photocathode (2), focusing electrode (3), the electron multiplication utmost point (4) and positive pole (5). Light electric signal transition device's tail end is provided with a plurality of pins (7) and electron vacuum tube (8). Pin (7) protrusion is on light electric signal transition device's afterbody structure surface. The inside secondary electron (10) that forms of light electric signal transition device. The utility model relates to a simply, having considered the influence of dark current, having avoided the signal too big, the structure of control undercurrent influence when it uses has reduced the interference of noise, has improved the precision of surveying.
Description
Technical field
The utility model relates to a kind of for the photoelectric signal conversion device in Photodetection system, belongs to photodetection field.
Background technology
Atmospheric Survey laser radar is called for short laser radar (Lidar), is the integration apparatus that a kind of light, mechanical, electrical and computer control combines, and it is by receiving air to the various atmosphere elements of scatter echo quantitative analysis of laser.Atmospheric Survey laser radar mainly adopts solid pulse laser, can have stronger echo-signal and higher spatial resolution like this, will simply introduce the operation principle of laser radar below for pulse lidar.General pulsed lidar system schematic diagram, form primarily of laser transmitting system, receiving optics, subsequent optical system, photodetection and collecting unit, control and display unit five major part, and all need photoelectric signal converter in laser transmitting system, receiving optics and photodetection and collecting unit.The general effect adopting photomultiplier to play photoelectric signal transformation in prior art, but current photomultiplier has a lot of defect, maximum defect is, can not get rid of to greatest extent the impact of dark current, cause noise very large, the interference be subject to is large, has a strong impact on detection accuracy.
Utility model content
In order to overcome the deficiencies in the prior art, resolving the problem of prior art, making up the deficiency of existing existing product in the market.
The utility model provides a kind of photoelectric signal conversion device, photoelectric signal conversion device comprises input window, photocathode, focusing electrode, dynode and anode, described anode is arranged on end dynode, according to the incident direction of incident light, be disposed with input window, photocathode, focusing electrode, dynode and anode.
Preferably, the tail end of above-mentioned photoelectric signal conversion device is provided with multiple pin and electronic vacuum pipe.
Preferably, above-mentioned pin protrudes the tail structure surface at photoelectric signal conversion device.
Preferably, above-mentioned photoelectric signal conversion device inside forms secondary electron.
The utility model simplicity of design, considers the impact of dark current, avoids signal excessive, and the structure controlling undercurrent impact when it uses reduces the interference of noise, improves the precision of detection.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Reference numeral: 1-input window; 2-photocathode; 3-focusing electrode; 4-dynode; 5-anode; 6-end dynode; 7-pin; 8-electronic vacuum pipe; 9-incident light; 10-secondary electron.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the utility model, below in conjunction with the drawings and the specific embodiments, the utility model being described in further detail.
If Fig. 1 is photoelectric signal conversion device of the present utility model, photoelectric signal conversion device comprises input window 1, photocathode 2, focusing electrode 3, dynode 4 and anode 5, described anode 5 is arranged on end dynode 6, according to the incident direction of incident light 9, be disposed with input window 1, photocathode 2, focusing electrode 3, dynode 4 and anode 5.The tail end of photoelectric signal conversion device is provided with multiple pin 7 and electronic vacuum pipe 8.Pin 7 protrudes the tail structure surface at photoelectric signal conversion device.Photoelectric signal conversion device inside forms secondary electron 10.
General principle of the present utility model is the device based on the principle of external photoelectric effect, light signal being converted to the signal of telecommunication.As seen from Figure 1, photoelectric signal conversion device is made up of photocathode 2, focusing electrode 3, dynode 4 and anode 5 four parts.Photoelectron is inspired when the photon of incident light 1 is irradiated to photocathode 2 by input window 1, focusing on through focusing electrode 3 enters in dynode system, in dynode system, by dynode 4, signal multiplication is amplified based on secondary electron 10 emission principle, the electronics after amplification is collected by anode 5 and is exported as an electrical current.
The technical indicator of the photoelectric signal conversion device that the utility model provides comprises: spectral response, sensitivity, dark current, response time and linear dynamic range.In the process used, need the dark current of control photoelectric signal conversion device and guarantee that photoelectric signal conversion device is operated in linear dynamic range.Cause the reason of dark current have following some:
Thermionic emission.Thermionic emission is relevant with temperature in photoelectric signal conversion device, and effective measures are cooled by photoelectric signal conversion device.
Leakage current.It is inadequate that the leakage current of photoelectric signal conversion device comes from the dielectric strength such as Guan Ji, base.Therefore to avoid the pollution on photoelectric signal conversion device surface and steam etc., through conventional alcohol wipe as far as possible.
Field emission.When the voltage of photoelectric signal conversion device is close to maximal work voltage, powerful electric field can make electrode generation field emitted electron.Therefore the operating voltage of photoelectric signal conversion device can not be too high.
Residual gas ionizes.In the vacuum chamber of photoelectric signal conversion device, residual gas and electron collision can ionize, and these Ions Bombardment photoelectric signal conversion devices or multiplier stage can bring secondary, are that detectable signal has larger noise.
Cosmic ray.μ meson in universe through photoelectric signal conversion device window time because of Cherenkov (Cherenkov) radiation, produce a large amount of photon noise.
Except dark current is on the impact of result of detection, in the process of use, also want attention can not be excessive, in order to avoid photoelectric signal conversion device is saturated, usually require that the voltage-divider current of photoelectric signal conversion device is at more than 20 times of anode current.
The utility model simplicity of design, considers the impact of dark current, avoids signal excessive, and the structure controlling undercurrent impact when it uses reduces the interference of noise, improves the precision of detection.
The embodiment of the above is better embodiment of the present utility model; not limit concrete practical range of the present utility model with this; scope of the present utility model comprises and is not limited to this embodiment, and the equivalence change that all shapes according to the utility model, structure are done is all in protection range of the present utility model.
Claims (4)
1. a photoelectric signal conversion device, it is characterized in that: described photoelectric signal conversion device comprises input window (1), photocathode (2), focusing electrode (3), dynode (4) and anode (5), described anode (5) is arranged on end dynode (6), according to the incident direction of incident light (9), be disposed with input window (1), photocathode (2), focusing electrode (3), dynode (4) and anode (5).
2. photoelectric signal conversion device according to claim 1, is characterized in that: the tail end of described photoelectric signal conversion device is provided with multiple pin (7) and electronic vacuum pipe (8).
3. photoelectric signal conversion device according to claim 2, is characterized in that: described pin (7) protrudes the tail structure surface at photoelectric signal conversion device.
4. photoelectric signal conversion device according to claim 1, is characterized in that: described photoelectric signal conversion device inside forms secondary electron (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520394912.1U CN204905211U (en) | 2015-06-03 | 2015-06-03 | Light electric signal transition device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520394912.1U CN204905211U (en) | 2015-06-03 | 2015-06-03 | Light electric signal transition device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204905211U true CN204905211U (en) | 2015-12-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520394912.1U Expired - Fee Related CN204905211U (en) | 2015-06-03 | 2015-06-03 | Light electric signal transition device |
Country Status (1)
| Country | Link |
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| CN (1) | CN204905211U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789016A (en) * | 2016-04-04 | 2016-07-20 | 陈蜀乔 | Non-contact object surface charge photomultiplier tube amplifier |
| CN110379702A (en) * | 2019-06-18 | 2019-10-25 | 中国科学院西安光学精密机械研究所 | A kind of adaptive Larger Dynamic range photomultiplier tube |
| CN110390136A (en) * | 2019-06-18 | 2019-10-29 | 中国科学院西安光学精密机械研究所 | A kind of method of adaptive extension photomultiplier tube dynamic range |
-
2015
- 2015-06-03 CN CN201520394912.1U patent/CN204905211U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105789016A (en) * | 2016-04-04 | 2016-07-20 | 陈蜀乔 | Non-contact object surface charge photomultiplier tube amplifier |
| CN105789016B (en) * | 2016-04-04 | 2018-09-28 | 黄俊龙 | A kind of non-contact object surface charge photomultiplier amplifier |
| CN109273345A (en) * | 2016-04-04 | 2019-01-25 | 卢定华 | Non-contact object surface charge photomultiplier tube amplifier |
| CN110379702A (en) * | 2019-06-18 | 2019-10-25 | 中国科学院西安光学精密机械研究所 | A kind of adaptive Larger Dynamic range photomultiplier tube |
| CN110390136A (en) * | 2019-06-18 | 2019-10-29 | 中国科学院西安光学精密机械研究所 | A kind of method of adaptive extension photomultiplier tube dynamic range |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151223 Termination date: 20160603 |