CN206709972U - A kind of homogeneity test device of terahertz detector - Google Patents
A kind of homogeneity test device of terahertz detector Download PDFInfo
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- CN206709972U CN206709972U CN201720540200.5U CN201720540200U CN206709972U CN 206709972 U CN206709972 U CN 206709972U CN 201720540200 U CN201720540200 U CN 201720540200U CN 206709972 U CN206709972 U CN 206709972U
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- terahertz
- detector
- light source
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- test device
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Abstract
The utility model discloses a kind of homogeneity test device of terahertz detector, including Terahertz light source, the light of the Terahertz light source output successively passes through diaphragm and Terahertz beam splitter, become two-way after Terahertz beam splitter, it is all the way calibration road, into reference power meter, for another way for detection road, the light for detecting road enters detector to be measured by a terahertz reflector again；The signal of detector output to be measured enters PC terminals by processing module；The detector to be measured is driven by translation stage and shifted one's position, and the motion of the translation stage is controlled by control system.It is simple and easy, control module is moved by introducing terahertz light source stability demarcating module and automation detector, unstable Terahertz light source and manually operated influence is reduced, thereby is achieved more accurate believable detector uniformity data.
Description
Technical field
Terahertz detector homogeneity test device technical field is the utility model is related to, more particularly to a kind of Terahertz is visited
Survey the homogeneity test device of device.
Background technology
The uniformity of terahertz detector refers to that in a short time the terahertz light of equal-wattage is radiated at terahertz detection
During device diverse location, the uniformity coefficient of the performance number measured by terahertz detector.Under existing measurement means, often assume
Light source is stabilized light source, but the light source of excellent stability hardly results in fact, especially in terahertz wave band.Assuming that uniformly
Property index request be less than 1%, this requires the unstability of Terahertz light source to be far smaller than 1% and could meet uniformity measurement
It is required that in particular for thermocouple type terahertz detector, the response time of this kind of detector is often all very long, from terahertz light
Incide detector surface to obtain stably exporting the time for taking around one minute to detector, want to obtain in such long-time
Accurate uniformity test data, the stability requirement to light source are too high.In addition, tradition realizes detector in two dimensional surface
Movement often utilize manual two-dimension translational platform, relative to terahertz wave band apply more extensive electrothermic type detector,
This will cause the change of detector background noise.
The influence of terahertz light source stability is not often accounted in existing detection terahertz detector uniformity device,
It is stabilized light source to be just assumed that Terahertz light source, this introduces influence of the unstable Terahertz light source to uniformity test, is removed
Outside this, man-made noise is readily incorporated during regulation detector position manually, is answered in particular in terahertz wave band
It is more sensitive to the temperature change of surrounding environment with more extensive electrothermic type detector, such detector, it is manually operated easy
Cause the change of detector background noise.
Utility model content
The purpose of this utility model is exactly to solve the above problems, there is provided a kind of uniformity of terahertz detector is surveyed
Trial assembly is put, and can effectively exclude test error caused by unstable Terahertz light source, and whole process is controlled with computer, and reduction is artificially drawn
The detector background noise change entered, it is ensured that the accuracy of detector uniformity test data.
To achieve these goals, the utility model adopts the following technical scheme that：
A kind of homogeneity test device of terahertz detector, including Terahertz light source, the Terahertz light source output
Light successively passes through diaphragm and Terahertz beam splitter, becomes two-way after Terahertz beam splitter, all the way to calibrate road, into standard
Power meter, for another way for detection road, the light for detecting road enters detector to be measured by a terahertz reflector again；Detector to be measured
The signal of output enters PC terminals by processing module；The detector to be measured is driven by translation stage and shifted one's position, the translation
The motion of platform is controlled by control system.
The diaphragm is aperture adjustable diaphragm.
The processing module includes the amplification module and AD conversion modules of series connection.
The amplification module includes the differential amplification module and programming amplifying module of series connection.
The translation stage is two-dimension translational platform.
The beneficial effects of the utility model are：
This utility model is simple and easy, is moved by introducing terahertz light source stability demarcating module and automation detector
Control module, unstable Terahertz light source and manually operated influence are reduced, thereby is achieved more accurate believable detector
Uniformity data.
Brief description of the drawings
Fig. 1 is the structural representation of this test device；
Wherein, 1. diaphragm, 2. Terahertz beam splitters, 3. terahertz reflectors, 4. differential amplification modules, 5. programming amplifying moulds
Block, 6.AD conversion modules.
Embodiment：
The utility model is described further with embodiment below in conjunction with the accompanying drawings：
As shown in figure 1, a kind of homogeneity test device of terahertz detector, including Terahertz light source, the Terahertz
The light of light source output successively passes through diaphragm 1 and Terahertz beam splitter 2, becomes two-way after Terahertz beam splitter 2, is all the way school
Quasi- road, into reference power meter, another way is detection road, and the light for detecting road treats probing by a terahertz reflector 3 entrance again
Survey device；The signal of detector output to be measured enters PC terminals by processing module；The detector to be measured is driven by translation stage to be become
Change place, the motion of the translation stage are controlled by control system.
The diaphragm 1 is aperture adjustable diaphragm.
The processing module includes the amplification module and AD conversion modules 6 of series connection.
The amplification module includes the differential amplification module 4 and programming amplifying module 5 of series connection.
The translation stage is two-dimension translational platform.
The utility model mainly includes optical design part and calculates control section.
Optical design part is mainly made up of too comprising Terahertz light source and Terahertz beam splitter, terahertz reflector etc.
Hertz light source stability demarcating module.
A kind of method of testing of the homogeneity test device of terahertz detector, Terahertz light source output light first pass through one
Aperture adjustable diaphragm, it is set to obtain small-bore, the terahertz light of uniform spatial distribution；This terahertz light passes through Terahertz beam splitter
After become two-way, be used to demarcate the stability of Terahertz light source all the way, referred to as calibrate road, be used to measure Terahertz in addition all the way
The uniformity of detector, referred to as detects road.The terahertz light power for calibrating road is detected in real time with standard detector, just
The real time data of terahertz light source stability can be obtained.The terahertz light on detection road enters to be measured by a terahertz reflector again
Detector, detector to be measured can realize movement of the detector in two-dimensional space via a planar stepping motor control.
Control section is calculated mainly comprising processing calculating, the shifting of planar stepping motor to terahertz detector output signal
Dynamic control and calibration power count value gather in real time；Due to terahertz detector output signal often be weak signal, it is necessary to
Subsequent conditioning circuit carries out corresponding enhanced processing, and the processing to detector output signal here, which calculates, mainly includes differential amplification electricity
Road, programmable amplifying circuit, AD translation circuits etc., it can be obtained and detection to be measured by PC terminal controls after being handled via foregoing circuit
Device exports corresponding terahertz light power P；
The mobile control of planar stepping motor predominantly realizes that detector to be measured moves in two dimensional surface toward specific direction
Fixed range, method a little is taken using cross, distinguished at detector center to be measured and distance center 2mm position up and down
Value；
Calibration power count value gathers the power output instantly for obtaining Terahertz light source, detector output to be measured in real time
The measured value of corresponding optical power value and reference power meter is P respectivelym(i)、Pn(i) (i=1 ..., 5), to exclude terahertz light
Error caused by the unstability of source, the performance number measured is modified, revised detector output to be measured is：
The uniformity of detector to be measured can be obtained by revised measured power, i.e.,：
P in formulamax、Pmin、PaveIt is the maximum, most of the luminous power correction value corresponding with detector to be measured output respectively
Small value and average value.
It is not new to this practicality although above-mentioned specific embodiment of the present utility model is described with reference to accompanying drawing
The limitation of type protection domain, one of ordinary skill in the art should be understood that on the basis of the technical solution of the utility model, ability
Field technique personnel need not pay the various modifications that creative work can make or deformation still in protection model of the present utility model
Within enclosing.
Claims (5)
1. a kind of homogeneity test device of terahertz detector, it is characterized in that, including Terahertz light source, the Terahertz light source
The light of output successively passes through diaphragm and Terahertz beam splitter, becomes two-way after Terahertz beam splitter, all the way to calibrate road, enters
Enter reference power meter, for another way for detection road, the light for detecting road enters detector to be measured by a terahertz reflector again；It is to be measured
The signal of detector output enters PC terminals by processing module；The detector to be measured is driven by translation stage and shifted one's position, institute
The motion for stating translation stage is controlled by control system.
2. a kind of homogeneity test device of terahertz detector as claimed in claim 1, it is characterized in that, the diaphragm is hole
Footpath adjustable diaphragm.
3. a kind of homogeneity test device of terahertz detector as claimed in claim 1, it is characterized in that, the processing module
Amplification module and AD conversion modules including series connection.
4. a kind of homogeneity test device of terahertz detector as claimed in claim 3, it is characterized in that, the amplification module
Differential amplification module and programming amplifying module including series connection.
5. a kind of homogeneity test device of terahertz detector as claimed in claim 1, it is characterized in that, the translation stage is
Two-dimension translational platform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720540200.5U CN206709972U (en) | 2017-05-16 | 2017-05-16 | A kind of homogeneity test device of terahertz detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720540200.5U CN206709972U (en) | 2017-05-16 | 2017-05-16 | A kind of homogeneity test device of terahertz detector |
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| Publication Number | Publication Date |
|---|---|
| CN206709972U true CN206709972U (en) | 2017-12-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720540200.5U Expired - Fee Related CN206709972U (en) | 2017-05-16 | 2017-05-16 | A kind of homogeneity test device of terahertz detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323851A (en) * | 2018-11-15 | 2019-02-12 | 中国电子科技集团公司第四十研究所 | A kind of Terahertz focal plane response rate and response rate inhomogeneities test macro and method |
-
2017
- 2017-05-16 CN CN201720540200.5U patent/CN206709972U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109323851A (en) * | 2018-11-15 | 2019-02-12 | 中国电子科技集团公司第四十研究所 | A kind of Terahertz focal plane response rate and response rate inhomogeneities test macro and method |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171205 Termination date: 20200516 |