CN203929358U - A kind of low temperature radiometer Brewster window transmitance measurement mechanism - Google Patents
A kind of low temperature radiometer Brewster window transmitance measurement mechanism Download PDFInfo
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- CN203929358U CN203929358U CN201420310420.5U CN201420310420U CN203929358U CN 203929358 U CN203929358 U CN 203929358U CN 201420310420 U CN201420310420 U CN 201420310420U CN 203929358 U CN203929358 U CN 203929358U
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Abstract
A kind of low temperature radiometer Brewster window transmitance measurement mechanism, comprises threeway vacuum tube, linear actuator and detector.Wherein the longitudinal opening end of threeway vacuum tube is provided with the first flange and the second flange, and transverse end opening is provided with three-flange, on threeway vacuum tube, linear actuator is housed; Wherein linear actuator comprises rotating handles, urceolus, corrugated tube, the 4th flange and driving shaft, can realize driving shaft rectilinear movement vertically by rotating rotating handles, on outer tube wall, with scale, can determine the stroke of driving shaft by the position of rotating handles; Detector one end in stretching into threeway vacuum tube with driving shaft is connected, and shifts out or cut light path along with moving of driving shaft.When this measurement mechanism can ensure transmitance measurement, the position of hot spot on window can not change, and greatly reduces the uncertainty of measurement that window transmitance is brought standard transmittance process, greatly improved the transmission of quantity value precision of low temperature radiometer.
Description
Technical field
The utility model relates to a kind of measurement mechanism, relates in particular to a kind of low temperature radiometer Brewster window transmitance measurement mechanism.
Background technology
The absolute measurement of optical radiation plays vital effect in space remote sensing, environmental monitoring, optical radiation measurement field, along with deepening continuously that quantification requires, the accurate measurement of optical radiation has been proposed to requirements at the higher level.Low temperature radiometer is the measurement standard of current optical radiation power measurement aspect full accuracy, and it utilizes low temperature, vacuum and superconductor technology, and optical radiation heating is measured and is entirely equivalent to electric power measurement, and its measuring accuracy has reached and has been better than 10
-5magnitude.The prostatitis that is in low temperature radiometer research taking the NIST of Britain NPL, German PTB and the U.S. as the mechanism of representative, low temperature radiometer has become the highest benchmark of optical radiation measurement in the world.At home, defense-related science, technology and industry photoelectron one-level test satellite location has carried out in a deep going way to count elementary standard with low-temp radiating, the optical radiation value transport system research taking trap detector as Transfer Standards.
Traditional window transmitance measuring method is before and after each calibration, window to be unloaded from low temperature radiometer, again window restoration is arrived to the duty identical with low temperature radiometer, had window and carried out the transmitance value of estimation window without the value of window by measurement, the measured value of experiment will be revised according to transmitance value.Window is after low temperature radiometer is pulled down, and it resets and exists larger difficulty, the angle that window resets and hot spot drop point site to be difficult to ensure with in full accord on low temperature radiometer; After each measurement, all vacuum tightness to be reduced to former duty as far as possible, consuming time and be difficult to guarantee system and do not change.In standard transmittance process, the window transmitance of low temperature radiometer becomes the main source that affects standard transmittance process uncertainty.
Utility model content
The purpose of this utility model is to provide a kind of low temperature radiometer Brewster window transmitance measurement mechanism, when this measurement mechanism can ensure transmitance measurement no longer there is any variation in the position of hot spot on window, low temperature radiometer also can not be affected, reduce the uncertainty of measurement that window transmitance is brought standard transmittance process, improved the transmission of quantity value precision of low temperature radiometer.
To achieve these goals, the technical solution of employing is the utility model:
A kind of low temperature radiometer Brewster window transmitance measurement mechanism, comprises threeway vacuum tube, linear actuator and detector; The longitudinal two ends of described threeway vacuum tube are provided with the first flange and the second flange, and transverse end is provided with three-flange; Described linear actuator is arranged on threeway vacuum tube, and the driving shaft of linear actuator stretches in threeway vacuum tube, and the front end of driving shaft connects detector.
Preferably, described linear actuator comprises rotating handles, corrugated tube, urceolus and the 4th flange, and described rotating handles is enclosed within on urceolus, on the outer wall of urceolus with scale, corrugated tube is positioned at urceolus inside, and the lower end of urceolus connects the 4th flange, and the 4th flange and threeway vacuum tube are fastenedly connected.
Preferably, described corrugated tube is in urceolus and coaxial with urceolus, and corrugated tube upper end is connected with rotary flange, and lower end is connected with the 4th flange.
Preferably, described the 4th flange inside is provided with linear bearing, and driving shaft mates with linear bearing.
Preferably, described the first flange is connected with low temperature radiometer vacuum valve, and described the second flange is connected with Brewster window.
The utility model is a kind of measurement mechanism of measurement window transmitance, compared with original technology, between low temperature radiometer vacuum valve and window, add a threeway vacuum tube, threeway vacuum tube two ends are connected by the first and second flanges with vacuum valve and window respectively, on threeway vacuum tube, linear actuator is housed, detector is connected with driving shaft and is placed in threeway vacuum tube inside, and transverse end opening is furnished with CF flange, to place and change detector.Rotating handles by rotation linear actuator can shift out detector or cut light path, measure the luminous power that sees through window, incide again the luminous power of window by another detector measurement, the responsiveness ratio of two detectors measures in same light path, by front and back two detector measurements to light power meter calculate the transmitance of window.When the method can ensure transmitance measurement there is not any variation in the position of hot spot on window, low-temp radiating meter systems also can not be affected, greatly reduce the uncertainty of measurement that window transmitance is brought standard transmittance process, greatly improved the transmission of quantity value precision of low temperature radiometer.The not mobile Brewster window of measuring process, without considering window reset issues, ensures that the position of hot spot on window is without any change.
Threeway vacuum tube one end is connected with low temperature radiometer vacuum valve, and the other end is connected with window, threeway vacuum tube small volume, the vacuum state when operation of not impact system and the transmission of light path.Threeway vacuum tube is equipped with linear actuator, can be by manual or electric control operation, and positioning precision is high, and repeatability is strong.
Detector is placed in threeway vacuum tube inside, can shift out fast or cut light path by linear actuator, can measure the transmitted optical power of window at any time, by another detector, incident optical power is measured again, in the situation that not affecting system running state, obtain accurately fast window transmitance, save the plenty of time.
Brief description of the drawings
Fig. 1 is a kind of structural representation of low temperature radiometer Brewster window transmitance measurement mechanism.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated:
In conjunction with Fig. 1, a kind of low temperature radiometer Brewster window transmitance measurement mechanism, comprises threeway vacuum tube 100, linear actuator 200 and detector 300, and linear actuator 200 is arranged on threeway vacuum tube 100, and detector 300 is connected with driving shaft 204.The longitudinal two-port of described threeway vacuum tube 100 is furnished with the first flange 101 and the second flange 102, transverse port is furnished with three-flange 103, threeway vacuum tube 100 openend the first flanges 101 are connected with low temperature radiometer vacuum valve, and the second flange 102 of another openend is connected with Brewster window; Described linear actuator 200 comprises rotating handles 201, corrugated tube 202, the 4th flange 203, driving shaft 204 and urceolus 205, wherein rotating handles 201 is positioned at the top of linear actuator 200, and be enclosed within the upper end of urceolus 205, the lower end of urceolus 205 is welded on the 4th flange 203; The inside that corrugated tube 202, the four flanges 203 are installed in sleeve is provided with linear bearing, and driving shaft 204 is suitable with linear bearing, thereby realizes the axial linear movement of driving shaft 204.The minimonitor that described detector 300 can be worked under ultra-high vacuum environment, and ensureing, under the prerequisite of measuring accuracy, to occupy less space, handled easily.Detector 300 is connected with driving shaft 204, can realize the rectilinear motion of driving shaft 204 by the rotation of rotating handles 201, thereby drives detector 300 to cut or remove light path.On the outer wall of urceolus 205, with scale, can determine the stroke of driving shaft 204 by rotating handles 201 and the relative position of scale.Linear actuator 200 precision are high, and repeatability is strong, can with motor combination, realize electric control operation.Detector 300 can normally be worked for a long time under ultra-high vacuum state, has suitable effective feeling light area and overall volume, and has higher stability.Because window transmitance is to be worth by the response ratio of detector, thus do not need the true responsiveness value of detector for known, by using explorer response relatively to draw by using under vacuum environment under detector and home in same light path.
The first flange 101 of threeway vacuum tube 100 is connected with low temperature radiometer vacuum valve, and the second flange 102 of another port is connected with Brewster window, by low temperature radiometer cavity, threeway vacuum tube 100 and Brewster window are evacuated to normal operation, regulate Brewster window to optimum transmission, close low temperature radiometer vacuum valve, open three-flange 103, aim at the position that main optical path regulates detector 300, detector 300 is shifted out main optical path by the rotating handles 201 of rotation linear actuator 200, close three-flange 103, again threeway vacuum tube 100 and Brewster window are evacuated down to former duty, open chamber vacuum valve, now low temperature radiometer enters normal operation, main optical path cut by detector 300 by rotating handles 201, by the accurately position of position locator 300 of the scale on linear actuator 200, measure the luminous power that sees through window, incide again the luminous power of window by another detector measurement, the responsiveness ratio of two detectors relatively draws in same light path, so can calculate the transmitance of window without the true responsiveness of detector for known.
The not mobile Brewster window of measuring process, without considering window reset issues, ensures that the position of hot spot on window is without any change, and low-temp radiating meter systems is not also affected.
Measuring process does not affect the vacuum state of system, after having measured, all vacuum tightness will be reduced to former duty at every turn, ensures the steady of system whole service state, and saves the plenty of time.
Certainly; above-mentioned explanation is not to restriction of the present utility model; the utility model is also not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art make in essential scope of the present utility model, also should belong to protection domain of the present utility model.
Claims (5)
1. a low temperature radiometer Brewster window transmitance measurement mechanism, is characterized in that: comprise threeway vacuum tube, linear actuator and detector; The longitudinal two ends of described threeway vacuum tube are provided with the first flange and the second flange, and transverse end is provided with three-flange; Described linear actuator is arranged on threeway vacuum tube, and the driving shaft of linear actuator stretches in threeway vacuum tube, and the front end of driving shaft connects detector.
2. a kind of low temperature radiometer Brewster window transmitance measurement mechanism according to claim 1, it is characterized in that: described linear actuator comprises rotating handles, corrugated tube, urceolus and the 4th flange, described rotating handles is enclosed within on urceolus, on the outer wall of urceolus with scale, corrugated tube is positioned at urceolus inside, the lower end of urceolus connects the 4th flange, and the 4th flange and threeway vacuum tube are fastenedly connected.
3. a kind of low temperature radiometer Brewster window transmitance measurement mechanism according to claim 2, is characterized in that: described corrugated tube is in urceolus and coaxial with urceolus, and corrugated tube upper end is connected with rotary flange, and lower end is connected with the 4th flange.
4. a kind of low temperature radiometer Brewster window transmitance measurement mechanism according to claim 2, is characterized in that: the inner linear bearing of installing of described the 4th flange, driving shaft mates with linear bearing.
5. according to a kind of low temperature radiometer Brewster window transmitance measurement mechanism described in claim 1 to 4 any one, it is characterized in that: described the first flange is connected with low temperature radiometer vacuum valve, described the second flange is connected with Brewster window.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420310420.5U CN203929358U (en) | 2014-06-12 | 2014-06-12 | A kind of low temperature radiometer Brewster window transmitance measurement mechanism |
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|---|---|---|---|
| CN201420310420.5U CN203929358U (en) | 2014-06-12 | 2014-06-12 | A kind of low temperature radiometer Brewster window transmitance measurement mechanism |
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| CN203929358U true CN203929358U (en) | 2014-11-05 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593324A (en) * | 2018-04-28 | 2018-09-28 | 北京卫星环境工程研究所 | The method that abatement radiation environment model uncertainty influences spacecraft performance evaluation |
| CN109579982A (en) * | 2018-11-15 | 2019-04-05 | 中国电子科技集团公司第四十研究所 | A kind of Brewster window, Brewster window angle computation method and adjusting method |
| CN110440911A (en) * | 2019-07-31 | 2019-11-12 | 中国电子科技集团公司第四十一研究所 | A kind of low temperature radiometer test integrating device and test method |
| CN113237905A (en) * | 2021-04-16 | 2021-08-10 | 北京纳米能源与系统研究所 | Device and method for stabilizing pumping light beam of electron microscope system and electron microscope system |
| CN113687507A (en) * | 2021-08-27 | 2021-11-23 | 西安应用光学研究所 | Ultrahigh vacuum light path switching mechanism applied to optical calibration device |
-
2014
- 2014-06-12 CN CN201420310420.5U patent/CN203929358U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108593324A (en) * | 2018-04-28 | 2018-09-28 | 北京卫星环境工程研究所 | The method that abatement radiation environment model uncertainty influences spacecraft performance evaluation |
| CN109579982A (en) * | 2018-11-15 | 2019-04-05 | 中国电子科技集团公司第四十研究所 | A kind of Brewster window, Brewster window angle computation method and adjusting method |
| CN110440911A (en) * | 2019-07-31 | 2019-11-12 | 中国电子科技集团公司第四十一研究所 | A kind of low temperature radiometer test integrating device and test method |
| CN110440911B (en) * | 2019-07-31 | 2021-07-27 | 中国电子科技集团公司第四十一研究所 | Test integration device and test method for low-temperature radiometer |
| CN113237905A (en) * | 2021-04-16 | 2021-08-10 | 北京纳米能源与系统研究所 | Device and method for stabilizing pumping light beam of electron microscope system and electron microscope system |
| CN113237905B (en) * | 2021-04-16 | 2023-06-23 | 北京纳米能源与系统研究所 | Device and method for stabilizing pumping beam of electron microscope system and electron microscope system |
| CN113687507A (en) * | 2021-08-27 | 2021-11-23 | 西安应用光学研究所 | Ultrahigh vacuum light path switching mechanism applied to optical calibration device |
| CN113687507B (en) * | 2021-08-27 | 2023-10-31 | 西安应用光学研究所 | Ultrahigh vacuum optical path switching mechanism applied to optical calibration device |
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