CN111983736A - Visible-near infrared light wave band absorber - Google Patents
Visible-near infrared light wave band absorber Download PDFInfo
- Publication number
- CN111983736A CN111983736A CN202010652336.1A CN202010652336A CN111983736A CN 111983736 A CN111983736 A CN 111983736A CN 202010652336 A CN202010652336 A CN 202010652336A CN 111983736 A CN111983736 A CN 111983736A
- Authority
- CN
- China
- Prior art keywords
- cavity
- absorber
- visible
- near infrared
- opening
- 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.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/003—Light absorbing elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/27—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
- G01N21/274—Calibration, base line adjustment, drift correction
- G01N21/278—Constitution of standards
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
Landscapes
- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Immunology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mathematical Physics (AREA)
- Theoretical Computer Science (AREA)
- Optics & Photonics (AREA)
- Optical Filters (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Paints Or Removers (AREA)
Abstract
The invention provides a visible-near infrared band absorber with improved absorptivity and used as a reference object, which comprises a main body, wherein a cavity is formed in the main body; and the inner surface of the cavity and the side, close to the absorber, of the diaphragm are coated with a coating with high absorptivity in the visible-near infrared light wave band. The visible-near infrared band absorber has the characteristics of high absorptivity, simple preparation process and good optical stability, and has important application prospect in the aspect of a standard device for material absorption test.
Description
Technical Field
The invention relates to the field of material visible-near infrared light band absorption rate measurement, in particular to a visible-near infrared light band absorber.
Background
In the measurement of the absorptivity of the material in the visible-near infrared light band, the degree that the absorptivity of the reference substance in the corresponding band is close to 100% determines the accuracy of the measured result. In order to improve the measurement accuracy of the absorptivity of the visible-near infrared light wave band of 400-1100 nm, a reference object with high absorptivity needs to be designed. At present, a reference object with a two-dimensional plane structure is available, but the absorption rate is low. For this reason, it is urgently required to design a visible-near infrared band absorber as a reference having a higher absorption rate than a reference of a two-dimensional planar structure. In order to design an absorber with high absorption rate as a reference, the absorption rate of the absorber needs to be simulated, and the methods for simulating the absorption rate of the absorber mainly comprise a Gouffe method and a Monte Carlo method.
Disclosure of Invention
In view of the above, the present invention aims to provide a visible-near infrared band absorber as a reference with improved absorption.
Therefore, the visible-near infrared light waveband absorber comprises a main body, wherein a cavity is formed inside the main body, an opening communicating the cavity with the outside of the absorber is formed in the main body, and a diaphragm used for controlling the area of the opening is arranged at the opening; and the inner surface of the cavity and the side, close to the absorber, of the diaphragm are coated with a coating with high absorptivity in the visible-near infrared light wave band.
The visible-near infrared band absorber has the characteristics of high absorptivity, simple preparation process and good optical stability, and has important application prospect in the aspect of a standard device for material absorption test.
Preferably, the cavity is formed into a cylindrical conical cavity, one side of the cavity, which is communicated with the opening, is a cylindrical cavity, and one end of the cylindrical cavity, which is far away from the opening, is a conical cavity with gradually reduced diameter.
Preferably, the cavity is formed as a spherical cavity.
Preferably, the cavity is formed as a cylindrical cavity with a thread on the inner wall.
Preferably, the coating is a high absorption material with a predominantly diffuse reflection.
Preferably, the high absorption rate material comprises matt black paint, aerospace black paint, ERB-3, copper nanowires or carbon nanoarrays.
Preferably, the light source is arranged outside the main body and corresponds to the opening of the main body.
Preferably, the light source is a collimated light source.
Drawings
FIG. 1 is a schematic structural diagram of a first embodiment of the visible-near infrared band absorber of the present invention;
FIG. 2 is a schematic structural diagram of a second embodiment of the visible-near infrared band absorber of the present invention;
FIG. 3 is a schematic structural diagram of a third embodiment of the absorber for visible-near infrared band according to the present invention;
fig. 4 is an absorbance diagram for a cylindrical conical cavity absorber and a spherical cavity absorber with matte black paint as the internal coating.
Detailed Description
The present invention is further described below in conjunction with the following embodiments and the accompanying drawings, it being understood that the drawings and the following embodiments are illustrative of the invention only and are not limiting thereof.
The invention aims to obtain a visible-near infrared band absorber with high absorption ratio and capable of being used as a reference. First, an absorber simulation model was designed. A parallel light source is adopted in a simulation model, the opening area of an absorber is controlled by using a diaphragm, and a coating with high absorptivity in a visible-near infrared light wave band is added on the inner wall of the absorber and the side of the diaphragm close to the absorber. The absorption rate of the absorber with the cavity structure under different cavity opening sizes is simulated. The simulated cavity structures are respectively a spherical cavity, a cylindrical conical cavity and a cylindrical cavity with threads on the inner wall. Fig. 1 to 3 are schematic structural views showing first to third embodiments of the visible-near infrared band absorber of the present invention, respectively.
As shown in fig. 1, in the present embodiment, the cavity structure of the visible-near infrared band absorber is a cylindrical conical cavity. Specifically, the visible-near infrared light band absorber of the present embodiment includes a body having a cavity formed therein, the body being substantially cylindrical, an opening being formed at one end of the body in the axial direction, and the other end being closed. In addition, the cavity formed in the main body is a cylindrical conical cavity, one side of the cavity communicated with the opening is a cylindrical cavity, and one end of the cylindrical cavity, which is far away from the opening, is a conical cavity with the diameter gradually reduced.
In addition, the opening is also provided with a diaphragm, and the area of the opening can be controlled by the diaphragm. In this embodiment, the diaphragm may be directly attached to the opening. Specifically, for the diaphragm with fixed size, a ring piece with a required aperture is arranged in the middle, a plurality of sunk screws are arranged at the edge of the ring piece to be fixed on the opening, and the surface is flat. A light source is arranged outside the main body and at a position corresponding to the opening of the main body, and the light source can be a parallel light source, namely, light beams emitted to the opening are parallel and incident perpendicular to the opening. And the light source is in close contact with a diaphragm mounted on the chamber.
In addition, as also shown in fig. 1, the inner surface of the cavity is coated with a coating with high absorptivity in the visible-near infrared band, and the absorptivity of the coating can be > 95.0%. In particular, the coating is applied over the entire inner surface of the cavity. And the side of the diaphragm close to the absorber is also coated with the above-mentioned coating.
As shown in fig. 2, in the present embodiment, the cavity structure of the visible-near infrared band absorber is a spherical cavity. Specifically, the visible-near infrared light band absorber of the present embodiment includes a body having a cavity formed therein, the body being substantially cylindrical, an opening being formed at one end of the body in the axial direction, and the other end being closed. In addition, the cavity formed in the main body is a spherical cavity, and one side of the cavity is communicated with the opening.
Similarly to the first embodiment, a diaphragm is further provided at the opening, and the area of the opening can be controlled by the diaphragm. A light source, which may be a collimated light source, is disposed outside the main body at a position corresponding to the opening of the main body. In addition, as shown in fig. 2, the inner surface of the cavity is coated with a coating layer having high absorptivity in the visible-near infrared band. And is also coated with the above-mentioned coating on the side of the diaphragm close to the absorber.
As shown in fig. 3, in this embodiment, the cavity structure of the visible-near infrared band absorber is a cylindrical cavity with threads on the inner wall. Specifically, the visible-near infrared light band absorber of the present embodiment includes a body having a cavity formed therein, the body being substantially cylindrical, an opening being formed at one end of the body in the axial direction, and the other end being closed. In addition, the cavity formed in the main body is a cylindrical cavity with a thread on the inner wall, and one axial end of the cavity is communicated with the opening.
Similarly to the first embodiment, a diaphragm is further provided at the opening, and the area of the opening can be controlled by the diaphragm. A light source, which may be a collimated light source, is disposed outside the main body at a position corresponding to the opening of the main body. In addition, as shown in fig. 3, the inner surface of the cavity is coated with a coating layer having high absorptivity in the visible-near infrared band. And is also coated with the above-mentioned coating on the side of the diaphragm close to the absorber.
From the above, in order to verify the simulation result, the invention selects the opaque material with a certain tensile strength (strength range value >100 MPa) and convenient for coating the internal coating to manufacture the cylindrical cavity absorber, the spherical cavity absorber, the cylindrical conical cavity absorber and the diaphragm for controlling the opening area of the absorbers, wherein the inner wall of the cylindrical cavity absorber is provided with threads. For example, the absorber body can be made using an aluminum alloy.
The inner surface of the absorber is covered with a high-absorptivity material with diffuse reflection as the main part, so that the absorber with high absorptivity is obtained, and the absorber can be used as a reference substance in absorptivity tests of block materials (solid materials or powder materials which can be pressed into blocks for measurement), film materials and the like. The high-absorptivity material covered on the inner surface of the absorber cavity can be, for example, matte black paint, aerospace black paint, ERB-3, copper nanowires, carbon nanoarrays and the like, but is not limited to these materials.
By testing the absorption rate of the absorber in each embodiment of the invention, the absorption rate of the visible-near infrared light band absorber with the cavity structure can reach 99.9% in a 400-1100 nm band, so that the visible-near infrared light band absorber is particularly suitable for the 400-1100 nm visible-near infrared light band. The specific test method can be that a PE1050 accessory with an integrating sphere is used for testing, a calibrated standard plate is used for baseline correction in a wavelength range of 400-1100 nm, and then reflectivity measurement is carried out on a cavity placed at a test position. Since the cavity transmittance is zero, the cavity absorptivity can be calculated according to the condition that the sum of the cavity reflectivity and the cavity absorptivity is 1. The invention can be used in the field of solid material absorptivity test.
Compared with the prior art, the invention has the following effects and advantages: 1. the invention has higher absorptivity compared with a two-dimensional absorber, because the cavity structure can enable light rays to be reflected for multiple times in the cavity in addition to the absorption of the light rays by the material per se, so that more light rays are absorbed to obtain higher absorptivity). 2. The absorber is designed by adopting a method combining theoretical simulation (namely, a simulation model of the absorber can be designed by using optical software) and test, so that the method is more efficient and credible. 3. The absorber provided by the invention has the advantages of simple structure, strong practicability and stable absorption performance, and particularly, the two-dimensional absorber is abraded due to contact with an instrument in the test process, so that the absorption rate of the two-dimensional absorber is reduced. The cavity structure enables the diaphragm with certain hardness to be in contact with the instrument, so that the contact and abrasion of the internal coating and the instrument are avoided, and the stability of the absorption rate of the absorber of the cavity structure is ensured.
The present invention will be described in detail by way of examples. It is also to be understood that the following examples are illustrative of the present invention and are not to be construed as limiting the scope of the invention, and that certain insubstantial modifications and adaptations of the invention by those skilled in the art may be made in light of the above teachings. The specific process parameters and the like of the following examples are also only one example of suitable ranges, i.e., those skilled in the art can select the appropriate ranges through the description herein, and are not limited to the specific values exemplified below.
Example 1
The absorption rate of a spherical cavity absorber with the opening (also called cavity opening) of phi 10mm, phi 15 mm and phi 25mm diaphragm circular holes and the diameter phi 80mm is simulated. Based on the absorber simulation model, the power of the parallel light source is set to be 1W, the area of the parallel light source is the same as that of the diaphragm opening, and the parallel light source is tightly attached to the diaphragm. The diaphragm is arranged at the opening of the absorber. The material is input into a spherical cavity absorber with the diameter phi of 80 mm. And a coating with the absorptivity of 97.0% in a visible-near infrared light wave band is added on the inner wall of the absorber and the side, close to the absorber, of the diaphragm. The number of times of light reflection is set to 2. The absorption rate of the absorber with the cavity structure under different cavity opening sizes is simulated. Simulation results show that the absorptivity of the spherical cavity absorber is over 99.9% no matter the size of the cavity opening.
Based on the simulation result, an aluminum alloy material is used for manufacturing a spherical cavity absorber with phi 80mm, and a diaphragm with phi 25mm is used for controlling the opening area of the absorber. The inner wall of the spherical chamber absorber was painted with 811-21 black paint from mankiewicz having an absorption of 97.0%. The absorption rate of the absorber in a 400-1100 nm wave band is measured by using a lambda1050+ ultraviolet visible near infrared spectrophotometer of Perkinelmer company. In a wave band of 400-1100 nm, the average absorption rate of the spherical cavity absorber reaches more than 99.9%.
Example 2
The absorber is simulated by cylindrical conical cavity absorbers with openings (also called cavity openings) of phi 10mm, phi 15 mm and phi 25mm diaphragm circular holes of phi 25.4mm multiplied by 80mm (the height 80mm does not include the height of the conical part, and the cone bottom angle is 120 degrees). Based on the absorber simulation model, the power of the parallel light source is set to be 1W, the area of the parallel light source is the same as that of the diaphragm opening, and the parallel light source is tightly attached to the diaphragm. The diaphragm is arranged at the opening of the absorber. A cylindrical conical cavity absorber of phi 25.4mm x 80mm (height 80mm does not include the height of the conical section, cone base angle 120 deg.) was input. And a coating with the absorptivity of 97.0% in a visible-near infrared light wave band is added on the inner wall of the absorber and the side, close to the absorber, of the diaphragm. The number of times of light reflection is set to 2. The absorption rate of the absorber with the cavity structure under different cavity opening sizes is simulated. Simulation results show that the absorption rate of the cylindrical conical cavity absorber is over 99.9% no matter the size of the cavity opening.
Based on the simulation results, a cylindrical conical cavity absorber of Φ 25.4mm × 80mm (height 80mm excluding the height of the conical portion, cone base angle 120 °) was fabricated using an aluminum alloy material, and the opening area of the absorber was controlled using a Φ 25mm diaphragm. The inner wall of the cylindrical conical cavity absorber is coated with 811-21 black paint of manikiewicz company with the absorption rate of 97.0%, and in the embodiment, a lambda1050+ ultraviolet visible near infrared spectrophotometer of Perkinelmer company can be used for measuring the absorption rate of the absorber in a wave band of 400-1100 nm. In a wave band of 400-1100 nm, the average absorption rate of the cylindrical conical cavity absorber reaches more than 99.9%.
Example 3
The absorption rate of a cylindrical cavity absorber with phi 10mm, phi 15 mm and phi 25mm circular diaphragm holes with threads on the inner walls is simulated, wherein the openings (also called cavity openings) of the absorber are phi 10mm, phi 15 mm and phi 25mm respectively. Based on the absorber simulation model, the power of the parallel light source is set to be 1W, the area of the parallel light source is the same as that of the diaphragm opening, and the parallel light source is tightly attached to the diaphragm. The diaphragm is arranged at the opening of the absorber. The input inner wall is provided with a threaded phi 45mm x 10mm cylindrical cavity absorber. And a coating with the absorptivity of 97.0% in a visible-near infrared light wave band is added on the inner wall of the absorber and the side, close to the absorber, of the diaphragm. The number of times of light reflection is set to 2. The absorption rate of the absorber with the cavity structure under different cavity opening sizes is simulated. Simulation results show that the absorption rate of the cylindrical cavity absorber decreases by 98.7% from 99.5% as the diameter of the cavity opening increases from 10mm to 25 mm. Therefore, the absorptivity of the cylindrical conical cavity absorber and the spherical cavity absorber is higher under the condition that the absorptivity of the coating of the inner wall is the same. To obtain a cylindrical cavity absorber with high absorption rate, an inner wall coating with higher absorption rate is adopted.
Based on the simulation result, an aluminum alloy material is used for manufacturing a cylindrical cavity absorber with threads phi 45mm multiplied by 10mm on the inner wall, and a diaphragm phi 25mm is used for controlling the opening area of the absorber. The absorption rate of the inner wall of the absorber with the inner wall provided with the threaded cylindrical cavity is 98.5 percent of nano copper by spraying. In the embodiment, a lambda1050+ ultraviolet-visible near infrared spectrophotometer of Perkinelmer company can be used for measuring the absorption rate of the absorber in a wave band of 400-1100 nm. In a wave band of 400-1100 nm, the average absorption rate of the cylindrical conical cavity absorber reaches more than 99.9%. The spherical cavity and the cylindrical conical cavity have a higher absorption rate but a larger volume than the cylindrical cavity, with the same absorption of the inner wall coating. The absorption rate of the coating on the inner wall is higher, the absorption rate of the cylindrical cavity absorber can also reach the same absorption rate as that of the spherical cavity and the cylindrical conical cavity compared with the cylindrical cavity, and the cylindrical cavity absorber has better practicability due to smaller volume.
As the present invention may be embodied in several forms without departing from the spirit of essential characteristics thereof, the present embodiments are therefore illustrative and not restrictive, since the scope of the invention is defined by the appended claims rather than by the description herein, and all changes that fall within metes and bounds of the claims, or equivalence of such metes and bounds thereof are therefore intended to be embraced by the appended claims.
Claims (8)
1. A visible-near infrared band absorber is characterized in that,
the absorber comprises a main body, wherein a cavity is formed in the main body, an opening communicated with the cavity and the outside of the absorber is formed in the main body, and a diaphragm used for controlling the area of the opening is arranged at the opening;
and the inner surface of the cavity and the side, close to the absorber, of the diaphragm are coated with a coating with high absorptivity in the visible-near infrared light wave band.
2. The visible-near infrared band absorber of claim 1,
the cavity is formed into a cylindrical conical cavity, one side of the cavity, which is communicated with the opening, is a cylindrical cavity, and one end of the cylindrical cavity, which is far away from the opening, is a conical cavity with the diameter gradually reduced.
3. The visible-near infrared band absorber of claim 1,
the cavity is formed as a spherical cavity.
4. The visible-near infrared band absorber of claim 1,
the cavity is formed as a cylindrical cavity with a threaded inner wall.
5. The visible-near infrared band absorber of any one of claims 1 to 4,
the coating is a high absorption material with diffuse reflection as the main component.
6. The visible-near infrared band absorber of claim 5,
the high-absorptivity material comprises extinction black paint, aerospace black paint, ERB-3, a copper nanowire or a carbon nanoarray.
7. The visible-near infrared band absorber of any one of claims 1 to 6,
the light source is arranged outside the main body and corresponds to the opening of the main body.
8. The visible-near infrared band absorber of claim 7,
the light source is a collimated light source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010652336.1A CN111983736B (en) | 2020-07-08 | 2020-07-08 | Visible-near infrared light wave band absorber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010652336.1A CN111983736B (en) | 2020-07-08 | 2020-07-08 | Visible-near infrared light wave band absorber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111983736A true CN111983736A (en) | 2020-11-24 |
| CN111983736B CN111983736B (en) | 2022-12-13 |
Family
ID=73439093
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010652336.1A Active CN111983736B (en) | 2020-07-08 | 2020-07-08 | Visible-near infrared light wave band absorber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111983736B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054539U (en) * | 1989-01-31 | 1990-03-14 | 中国科学院安徽光学精密机械研究所 | Light absorber |
| RU2074753C1 (en) * | 1994-06-09 | 1997-03-10 | Владимир Михайлович Дрюков | Device for physical therapy |
| CN101551169A (en) * | 2009-05-07 | 2009-10-07 | 上海交通大学 | Cavity type solar energy absorber |
| CN102538958A (en) * | 2011-12-23 | 2012-07-04 | 中国科学院长春光学精密机械与物理研究所 | High-absorptivity radiation absorption chamber |
-
2020
- 2020-07-08 CN CN202010652336.1A patent/CN111983736B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2054539U (en) * | 1989-01-31 | 1990-03-14 | 中国科学院安徽光学精密机械研究所 | Light absorber |
| RU2074753C1 (en) * | 1994-06-09 | 1997-03-10 | Владимир Михайлович Дрюков | Device for physical therapy |
| CN101551169A (en) * | 2009-05-07 | 2009-10-07 | 上海交通大学 | Cavity type solar energy absorber |
| CN102538958A (en) * | 2011-12-23 | 2012-07-04 | 中国科学院长春光学精密机械与物理研究所 | High-absorptivity radiation absorption chamber |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111983736B (en) | 2022-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7541994B2 (en) | Refractive compact range | |
| US7965228B2 (en) | Quasi-compact range | |
| CN108169263B (en) | Grazing incidence experimental device for neutron small-angle scattering | |
| US11662542B2 (en) | Flow cytometer, laser optics assembly thereof, and methods of assembling the same | |
| CN102590988B (en) | Compensator camera lens for aspheric surface detection | |
| CN105842167A (en) | Optical path adjustable gas-absorbing pool | |
| CN111983736B (en) | Visible-near infrared light wave band absorber | |
| JP2010276363A (en) | Instrument and method for measuring optical characteristics | |
| Ben Yaala et al. | Bidirectional reflectance measurement of tungsten samples to assess reflection model in WEST tokamak | |
| CN111982817B (en) | Variable optical path multiple reflection pool and optical path adjusting method | |
| CN207571018U (en) | A kind of gas absorption cell light channel structure suitable for fume continuous monitoring system | |
| Balabukha et al. | Development of a Plane Lens for a Tapered Anechoic Chamber | |
| CN102890975B (en) | Optical device for focusing synchrotron radiation light source | |
| CN206594055U (en) | Moisture content determining device | |
| WO2020028176A1 (en) | Diffuse reflectance apparatus | |
| Su et al. | Analysis of the errors of the integrating sphere for the transmittance of nonplanar optical components | |
| Zhan et al. | Influence of a microstructured surface on the infrared radiation characteristics of a spatial target | |
| Synak et al. | Roughness evaluation of very smooth surfaces using a novel method of scatter measurement | |
| CN117740736A (en) | Low-reflection light absorption layer surface diffuse reflection measurement method | |
| Georgiev et al. | The effect of speckle on BRDF measurements | |
| Guan et al. | Research on angle response characteristics of scattering sampling for detector array target | |
| Luo et al. | Simulation and experimental research on the uniformity of the surface light source out from the integrating sphere | |
| Xu et al. | Optical design of a novel near-infrared phase contrast imaging (NI-PCI) diagnostic on the HL-2A tokamak | |
| Jin et al. | Accurate Reflectance Measurement of Spherical Mirror at Multi-wavelength on LHAASO-WFCTA | |
| CN114858288A (en) | Design method of high-emissivity satellite-borne blackbody radiation source based on light ray capture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |