CN102721475A - Novel precision aperture for radiometer - Google Patents
Novel precision aperture for radiometer Download PDFInfo
- Publication number
- CN102721475A CN102721475A CN2012101692903A CN201210169290A CN102721475A CN 102721475 A CN102721475 A CN 102721475A CN 2012101692903 A CN2012101692903 A CN 2012101692903A CN 201210169290 A CN201210169290 A CN 201210169290A CN 102721475 A CN102721475 A CN 102721475A
- Authority
- CN
- China
- Prior art keywords
- mechanical support
- radiometer
- annular bottom
- aperture
- cutting edge
- 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
Images
Landscapes
- Radiation Pyrometers (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Abstract
The invention discloses a novel precision aperture for a radiometer and relates to the field of optical radiation measurement, in particular to a novel precision aperture matched with a radiation absorption cavity. The problem of incident light energy loss in the radiometer is solved. The precision aperture comprises a cutting edge-shaped incident aperture, a hemispherical cladding and a mechanical support, wherein the bottom of the mechanical support is an annular bottom surface; the center of a circle of the annular bottom surface is positioned on an axis of the cutting edge-shaped incident aperture; the axis of the cutting edge-shaped incident aperture is perpendicular to the annular bottom surface of the mechanical support and the upper surface of the mechanical support; and the inner surface of the annular bottom surface of the mechanical support, the upper surface of the mechanical support and the hemispherical cladding are mechanically polished. By the novel precision aperture for the radiometer, the energy escaping the radiation absorption cavity is reflected to the radiation absorption cavity and is continuously absorbed, the absorptivity of the radiometer is effectively improved, the incident light energy loss in the radiometer is reduced, and the upper surface of the mechanical support is polished, so that the measuring result of the system is not influenced by the light energy incoming the mechanical support, and the measuring precision of the radiometer is improved.
Description
Technical field
The present invention relates to the optical radiation measurement field, be specifically related to a kind of novel precise diaphragm that is used with the radiation absorbing cavity.
Background technology
Radiometer has important use in scientific research and people's productive life; No matter be that metrological service sets up the optical radiation measurement benchmark; Solar irradiance is measured on the ground as weather forecast and the monitoring of medium-term and long-term weather by meteorological department; Still on spacecraft, measure solar constant, radiometer all plays an important role.In recent years, metrological service proposes in ground and space, to set up absolute light actinometry benchmark respectively in succession.Last century the eighties, low temperature radiometer (CR) is developed in various countries measurement standard laboratory on ground, obtain tracing back to the actinometry result of SI (International System of Units).Absolute light actinometry benchmark is set up in Britain's National Physical Laboratory (NPL) in 2002 proposition in the space; Adopt mechanical refrigerator that the working environment of radiometer is cooled to 20K; Low temperature environment greatly improves the thermal property of radiation absorbing cavity, can effectively improve the optical radiation measurement precision.In addition, be to improve absorptive rate of radiation, adopt the cylindrical cavity of band inclined end face to replace original normal cone shape chamber, and normal cone shape cavity wall scribbles the black figure layer of absorption that helps obtaining high-absorbility etc.These methods all obtain big effect on absorptivity that improves the radiation absorbing cavity and radiometer measurement precision.
Mostly adopt planar shaped diaphragm (like accompanying drawing 1) on the radiometer at present; Optical radiation gets into the radiation absorbing cavity through the aperture of the diaphragm; Most of energy is absorbed, but still has the fraction energy from the loss of radiation absorbing cavity bore, and this part energy of loss is to cause the radiometer absorptivity low; Influencing the key factor of measuring accuracy, is the major issue that faces at present so how to reduce this part energy loss to greatest extent.
Summary of the invention
The objective of the invention is to solve the problem of the loss of incident light energy in the radiometer, proposed the novel precise diaphragm used on a kind of radiometer, improve absorptive rate of radiation and radiometer measurement precision.
For realizing above-mentioned purpose; The novel precise diaphragm of using on a kind of radiometer of the present invention comprises that blade shape input aperture, semisphere coat and mechanical support; The bottom surface of described mechanical support is an annular bottom surface; The center of circle of said annular bottom surface is on the axis of blade shape input aperture; The axis of said blade shape input aperture is vertical with the annular bottom surface of said mechanical support and mechanical support upper surface, and the inside surface of the annular bottom surface of described mechanical support, mechanical support upper surface and semisphere coat and adopt mechanical buffing.
The cutting edge of said blade shape input aperture is pointed.
Beneficial effect of the present invention: novel precise diaphragm of the present invention is semisphere the absorbing cavity bore is coated fully; When a branch of light incided the radiation absorbing cavity from the input aperture, through repeatedly reflection, most of luminous energy was absorbed by the radiation absorbing cavity; The unabsorbed light of minority is divergent shape and leaves radiation absorbing cavity cavity; Semisphere coats the energy reflection that will flee from the radiation absorbing cavity and returns continuation absorption in the radiation absorbing cavity, effectively improves the radiometer absorptivity, reduces incident light energy loss in the radiometer; The mechanical support upper surface is thrown the bright measurement result that makes the luminous energy that incides on the mechanical support not influence system, improves the measuring accuracy of radiometer.
Description of drawings
Fig. 1 is the structural representation of existing accurate diaphragm;
Fig. 2 is the structural representation of the novel precise diaphragm used on a kind of radiometer of the present invention;
Wherein 1, the blade shape input aperture, 2, semisphere coats, 3, mechanical support, 4, annular bottom surface, 5, the mechanical support upper surface, 6, the radiation absorbing cavity, 7, radiation absorbing cavity bore;
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Embodiment one:
As depicted in figs. 1 and 2; The novel precise diaphragm of using on a kind of radiometer of the present invention comprises blade shape input aperture 1, semisphere coating 2 and mechanical support 3; The bottom surface of described mechanical support 3 is an annular bottom surface 4; The center of circle of said annular bottom surface 4 is on the axis of blade shape input aperture 1; The axis of said blade shape input aperture 1 is vertical with the annular bottom surface 4 of said mechanical support and mechanical support upper surface 5, and the inside surface of the annular bottom surface 4 of described mechanical support 3, mechanical support upper surface 5 and semisphere coat 2 and adopt mechanical buffing.The cutting edge of said blade shape input aperture 1 is pointed.
When being used with radiation absorbing cavity 6; The annular bottom surface 4 of said mechanical support 3 contacts with radiation absorbing cavity bore 7 no gaps; The said annular bottom surface 4 and the radiation absorbing cavity bore 7 concyclic hearts, the dead in line of the center of circle of said blade shape input aperture 1 and the center of circle of annular bottom surface 4 place straight line and conical radiation absorbing cavity 6.
The inside surface of said annular bottom surface 4 and semisphere coat 2 and throw the bright emittance of leaving radiation absorbing cavity 6 cavitys that makes and follow the direct reflection law during with the diaphragm interaction.
Embodiment two: the novel precise diaphragm of using on a kind of radiometer of the present invention is used for the solar radiation monitor of working at space; In space environment, owing to receive the influence of cosmic rays, space particle, it is serious that radiation absorbing cavity inwall absorbs black absorptivity decay; For obtaining reliable and stable actinometry result; Adopt novel precise diaphragm of the present invention and inwall to be coated with to absorb black absorbing cavity to be used, when optical radiation is incident to absorbing cavity, has diaphragm that semisphere coats and can will leave in the light reflected back chamber of cavity and continue absorption; The optical radiation absorptivity can not only be improved like this, its measuring stability can also be taken into account.
The proposition of three: 2002 years Britain's National Physical Laboratories (NPL) of embodiment desires in the space, to set up the radiometric new benchmark of absolute light through development low temperature sun absolute radiometer; For obtaining the actinometry result of superhigh precision, the absorptivity of radiation absorbing cavity should reach 0.99999 in the low temperature sun absolute radiometer, near 1; Novel precise diaphragm of the present invention is used in the low temperature sun absolute radiometer; When optical radiation is incident to absorbing cavity; Have the semisphere diaphragm of specularly reflecting surface and can will leave continue absorption in the light reflected back chamber of cavity; Help improving the instrument absorptive rate of radiation, obtain high-precision actinometry result.
More than be specific embodiment of the present invention, but be not limitation of the present invention.
Claims (2)
1. the novel precise diaphragm of using on the radiometer; It is characterized in that; This precision diaphragm comprises that blade shape input aperture (1), semisphere coat (2) and mechanical support (3); The bottom surface of described mechanical support (3) is annular bottom surface (4); The center of circle of said annular bottom surface (4) is on the axis of blade shape input aperture (1), and the axis of said blade shape input aperture (1) is vertical with the annular bottom surface (4) and the mechanical support upper surface (5) of said mechanical support, and the inside surface of the annular bottom surface (4) of described mechanical support (3), mechanical support upper surface (5) and semisphere coat (2) and adopt mechanical buffing.
2. the novel precise diaphragm of using on a kind of radiometer according to claim 1 is characterized in that, the cutting edge of said blade shape input aperture (1) is pointed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101692903A CN102721475A (en) | 2012-05-28 | 2012-05-28 | Novel precision aperture for radiometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101692903A CN102721475A (en) | 2012-05-28 | 2012-05-28 | Novel precision aperture for radiometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102721475A true CN102721475A (en) | 2012-10-10 |
Family
ID=46947300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101692903A Pending CN102721475A (en) | 2012-05-28 | 2012-05-28 | Novel precision aperture for radiometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102721475A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345061A (en) * | 2013-05-17 | 2013-10-09 | 中国科学院长春光学精密机械与物理研究所 | High-precision diaphragm slit for eliminating converging light and stray light |
| CN110954210A (en) * | 2019-11-19 | 2020-04-03 | 南华大学 | Photo-thermal receiver capable of improving measurement precision of absolute radiometer and preparation method thereof |
| CN113686428A (en) * | 2021-08-27 | 2021-11-23 | 西安应用光学研究所 | Low-temperature radiometer absorption cavity |
| CN114265137A (en) * | 2021-12-30 | 2022-04-01 | 中国科学院长春光学精密机械与物理研究所 | Reflector and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05231932A (en) * | 1992-02-20 | 1993-09-07 | Eikou Seiki Kk | Self-calibration type solar radiometer |
| CN1116707A (en) * | 1994-05-13 | 1996-02-14 | 松下电器产业株式会社 | Radiation detector |
| CN101375112A (en) * | 2006-01-17 | 2009-02-25 | 索利安特能源公司 | A hybrid primary optical component for optical concentrators |
| WO2010020816A1 (en) * | 2008-08-22 | 2010-02-25 | Absl Power Solutions Limited | Calibration load |
-
2012
- 2012-05-28 CN CN2012101692903A patent/CN102721475A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05231932A (en) * | 1992-02-20 | 1993-09-07 | Eikou Seiki Kk | Self-calibration type solar radiometer |
| CN1116707A (en) * | 1994-05-13 | 1996-02-14 | 松下电器产业株式会社 | Radiation detector |
| CN101375112A (en) * | 2006-01-17 | 2009-02-25 | 索利安特能源公司 | A hybrid primary optical component for optical concentrators |
| WO2010020816A1 (en) * | 2008-08-22 | 2010-02-25 | Absl Power Solutions Limited | Calibration load |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103345061A (en) * | 2013-05-17 | 2013-10-09 | 中国科学院长春光学精密机械与物理研究所 | High-precision diaphragm slit for eliminating converging light and stray light |
| CN110954210A (en) * | 2019-11-19 | 2020-04-03 | 南华大学 | Photo-thermal receiver capable of improving measurement precision of absolute radiometer and preparation method thereof |
| CN110954210B (en) * | 2019-11-19 | 2021-11-12 | 南华大学 | Photo-thermal receiver capable of improving measurement precision of absolute radiometer and preparation method thereof |
| CN113686428A (en) * | 2021-08-27 | 2021-11-23 | 西安应用光学研究所 | Low-temperature radiometer absorption cavity |
| CN114265137A (en) * | 2021-12-30 | 2022-04-01 | 中国科学院长春光学精密机械与物理研究所 | Reflector and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102590150B (en) | Indoor hyperspectral bidirectional reflectance distribution function (BRDF) determining system | |
| Yun et al. | Radio properties of infrared-selected galaxies in the IRAS 2 Jy sample | |
| CN107153426B (en) | Sun tracking sensor based on optical fiber light guide | |
| CN102721475A (en) | Novel precision aperture for radiometer | |
| Zinian et al. | A comparison of optical performance between evacuated collector tubes with flat and semicylindric absorbers | |
| Saari et al. | The sunlit lunar surface: I. Albedo Studies and Full Moon Temperature Distribution | |
| CN102253404A (en) | Portable neutron detection device | |
| CN104597479A (en) | Neutron position detection device | |
| CN101813650B (en) | Radiometer for performance in-situ test of thermal control coat | |
| CN101750623B (en) | Portable energy adjusting device for heat energy-100 MeV neutron | |
| CN109614649A (en) | A kind of full weather heat analysis method towards South China's bridge | |
| CN108731802B (en) | Device and method for rapidly estimating surface solar scattered radiation | |
| CN105136140A (en) | Photoelectric assembly for biaxial miniature analog type sun sensor | |
| CN202210159U (en) | Portable neutron detection device | |
| CN106764680A (en) | The solar simulator optical system of three-junction gallium arsenide solar battery test | |
| CN205748435U (en) | The caliberating device of big optics dynamic range detector dynamic range | |
| Cai et al. | Wide field-of-view atmospheric Cherenkov telescope based on refractive lens | |
| CN102538958A (en) | High-absorptivity radiation absorption chamber | |
| CN106154357B (en) | A kind of High Precision Automatic calibrating installation for photoelectricity sunshine recorder | |
| CN106768308A (en) | Ultra-thin light inlet integrating sphere type cosine adjuster | |
| CN204064453U (en) | A kind of complementary chord angle compensator for ultraviolet illuminometer and ultraviolet illuminometer | |
| Chen et al. | Performance of a wide field-of-view atmospheric Cherenkov telescope prototype based on a refractive lens | |
| CN103900562B (en) | Detector during a kind of pulsar navigation roentgenometer | |
| CN207335212U (en) | A kind of obnubilation for solar energy acquisition region prejudges fore device | |
| CN112284533B (en) | Radiometer for remote sensor on-orbit atmospheric correction |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121010 |