CN106017680A - Halogen tungsten lamp source and imaging spectrometer onboard calibration method - Google Patents
Halogen tungsten lamp source and imaging spectrometer onboard calibration method Download PDFInfo
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- 238000003384 imaging method Methods 0.000 title claims abstract description 117
- 229910052736 halogen Inorganic materials 0.000 title claims abstract description 79
- 229910052721 tungsten Inorganic materials 0.000 title claims abstract description 79
- 239000010937 tungsten Substances 0.000 title claims abstract description 79
- 150000002367 halogens Chemical class 0.000 title claims abstract description 52
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000003595 spectral effect Effects 0.000 claims abstract description 138
- 238000001514 detection method Methods 0.000 claims abstract description 30
- 238000005286 illumination Methods 0.000 claims abstract description 14
- 239000011248 coating agent Substances 0.000 claims abstract description 9
- 238000000576 coating method Methods 0.000 claims abstract description 9
- 238000004364 calculation method Methods 0.000 claims abstract description 5
- 238000001228 spectrum Methods 0.000 claims description 30
- -1 tungsten halogen Chemical class 0.000 claims description 27
- 230000005540 biological transmission Effects 0.000 claims description 12
- 238000012546 transfer Methods 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 5
- 235000015250 liver sausages Nutrition 0.000 abstract 1
- 230000002068 genetic effect Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 238000002310 reflectometry Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
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- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
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Abstract
The invention discloses a halogen tungsten lamp source and an imaging spectrometer onboard calibration method. The halogen tungsten lamp source comprises an integrating sphere light source, a collimation system, a reflecting mirror, a diffuse reflection pate and a power control device. The integrating sphere light source comprises an integrating sphere and a halogen tungsten lamp arranged in the integrating sphere and is used for transmitting detection light, and the inner surface of the integrating sphere is provided with a diffuse reflection coating; the collimation system is used for collimating the detection light to obtain collimated detection light; the reflecting mirror is used for totally reflecting the collimated detection light to make the collimated detection light vertically enter the diffuse reflection plate to obtain illumination light exiting from the diffuse reflection plate; the power control device is used for controlling the radiance in the integrating sphere light source to be a fixed value. Compared with sunlight, the halogen tungsten lamp source has the advantage of being smooth in spectral curve, the difficulty of obtaining the spectral curve of the halogen tungsten lamp source through calculation with multiple spectral radiance values is lowered, and thus the difficulty of the imaging spectrometer onboard calibration method using the halogen tungsten lamp source is lowered.
Description
Technical Field
The application relates to the technical field of imaging spectrometer on-satellite calibration, in particular to a halogen tungsten lamp light source and an imaging spectrometer on-satellite calibration method.
Background
With the development of scientific research, particularly in the national economy field, high-precision hyperspectral remote sensing data is needed for the research of problems such as crop estimation, mineral exploration, resource general survey, environmental monitoring and the like. High spectral Remote Sensing (Hyper spectral Remote Sensing), which is called as high spectral resolution Remote Sensing, refers to a technology of continuously remotely Sensing and imaging a ground object by using a narrow and continuous spectral channel, wherein the most important imaging device is an imaging spectrometer, so the imaging effect of the Hyper spectral Remote Sensing is greatly influenced by the on-satellite calibration precision of the imaging spectrometer.
In the prior art, the process of on-satellite calibration of the imaging spectrometer mainly includes: a sunlight irradiation diffuse reflection plate is used as a transfer light source of a transfer radiometer calibration imaging spectrometer; utilizing the transfer radiometer to calibrate a plurality of spectral channels of an imaging spectrometer to obtain spectral responsivity of the plurality of spectral channels; since the number of spectral channels of the transmission radiometer is generally much smaller than that of the imaging spectrometer, the diffuse reflection plate for reflecting sunlight needs to be calibrated by using the transmission radiometer, and the spectrum of the sunlight is inverted; and finally, calibrating all the unscaled channels of the imaging spectrometer by utilizing the inverted sunlight spectrum and the readings of all the unscaled channels of the imaging spectrometer, thereby completing the on-satellite calibration process of the imaging spectrometer.
However, the distribution smoothness of the sunlight spectrum is low, so that the difficulty of inverting the sunlight spectrum is high, and the difficulty of on-satellite calibration of the imaging spectrometer is increased; and the sunlight spectrum is unstable in a short period, which causes the situation that the actual sunlight spectrum is inconsistent with the inverted sunlight spectrum when all the unscaled channels of the imaging spectrometer are calibrated by using the inverted sunlight spectrum, so that the accuracy of the on-satellite calibration of the imaging spectrometer is poor.
Therefore, an imaging spectrometer on-satellite calibration method with low difficulty and high precision is needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a halogen tungsten lamp light source and an imaging spectrometer on-satellite calibration method, so as to achieve the purpose of providing the imaging spectrometer on-satellite calibration method with lower difficulty and higher precision.
In order to achieve the technical purpose, the embodiment of the invention provides the following technical scheme:
a kind of halogen tungsten lamp light source, apply to the imaging spectrometer and calibrate on the satellite, including: the device comprises an integrating sphere light source, a collimation system, a reflector, a diffuse reflection plate and a power control device; wherein,
the integrating sphere light source comprises an integrating sphere and a halogen tungsten lamp arranged in the integrating sphere and used for sending detection light, and the inner surface of the integrating sphere is provided with a diffuse reflection coating;
the collimation system is used for collimating the detection light to obtain collimated detection light;
the reflector is used for totally reflecting the collimated detection light rays, so that the collimated detection light rays are vertically incident to the diffuse reflection plate, and illumination light rays emitted by the diffuse reflection plate are obtained;
the power control device is used for controlling the radiance inside the integrating sphere light source to be a fixed value.
Preferably, the power control apparatus includes:
a monitor detector for detecting radiance within the integrating sphere light source;
and the power controller is used for adjusting the power of the halogen tungsten lamp according to the radiance detected by the monitoring detector and controlling the radiance in the integrating sphere light source to be a fixed value.
Preferably, the mirror surface has a total reflection film.
Preferably, the diffuse reflection plate has a diffuse reflection coating on a surface thereof.
An imaging spectrometer on-satellite calibration method, comprising:
providing illumination light for a transmission radiometer by using a tungsten halogen lamp light source, wherein the tungsten halogen lamp light source is the tungsten halogen lamp light source in any embodiment, and the transmission radiometer is a transmission radiometer which is traced from a space low-temperature radiometer;
utilizing the transfer radiometer to calibrate a plurality of spectral channels of an imaging spectrometer to obtain spectral responsivity of the plurality of spectral channels;
calculating to obtain a plurality of spectral radiance values according to the spectral responsivity of the plurality of spectral channels and the corresponding reading of the plurality of spectral channels of the imaging spectrometer;
calculating to obtain a spectrum curve of the halogen tungsten lamp light source according to the plurality of spectrum radiance values;
and calculating and obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the spectral curve and the readings of all the unscaled channels of the imaging spectrometer.
Preferably, the formula for obtaining the plurality of spectral radiance values by calculating according to the spectral responsivities of the plurality of spectral channels and the readings of the plurality of spectral channels of the corresponding imaging spectrometer is as follows:
wherein L is spectral radiance; v is the spectral channel reading of the imaging spectrometer; ρ is the spectral responsivity.
Preferably, the calculating and obtaining the spectrum curve of the light source of the halogen tungsten lamp according to the plurality of spectrum radiance values comprises:
and calculating to obtain a spectrum curve of the halogen tungsten lamp light source by utilizing an interpolation method according to the plurality of spectrum radiance values.
Preferably, the calculating and obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the spectral curve and the readings of all the unscaled channels of the imaging spectrometer comprises:
obtaining radiances of all unscaled channels of the imaging spectrometer according to the spectral curve;
and calculating to obtain the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the radiance of all the unscaled channels of the imaging spectrometer and the reading of all the unscaled channels of the imaging spectrometer.
Preferably, the formula for obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer by calculating according to the radiances of all the unscaled channels of the imaging spectrometer and the readings of all the unscaled channels of the imaging spectrometer is as follows:
wherein L is spectral radiance; v is the spectral channel reading of the imaging spectrometer; ρ is the spectral responsivity.
Preferably, the wavelength of the illumination light is a characteristic wavelength with the highest full-spectrum inversion accuracy of the light source of the tungsten halogen lamp.
It can be seen from the above technical solutions that the embodiments of the present invention provide a tungsten halogen lamp light source and an imaging spectrometer on-satellite calibration method, wherein the imaging spectrometer on-satellite calibration method uses the tungsten halogen lamp light source as a calibration light source for calibrating the imaging spectrometer by the transfer radiometer, so as to obtain spectral responsivity of the plurality of spectral channels; then, calculating to obtain a plurality of spectral radiance values according to the spectral responsivity of the plurality of spectral channels and the reading of the plurality of spectral channels of the corresponding imaging spectrometer, and calculating to obtain a spectral curve of the halogen tungsten lamp light source by using the plurality of spectral radiance values; and finally, calculating and obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the spectral curve and the readings of all the unscaled channels of the imaging spectrometer. Compared with sunlight, the halogen tungsten lamp light source has the advantage of smooth spectral curve, so that the difficulty of obtaining the spectral curve of the halogen tungsten lamp light source by utilizing the calculation of the plurality of spectral radiance values is reduced, and the difficulty of an imaging spectrometer on-satellite calibration method utilizing the halogen tungsten lamp light source is reduced.
Furthermore, because the on-satellite attenuation of the halogen tungsten lamp light source is consistent, the spectral curve of the halogen tungsten lamp light source can be kept highly stable by a method of controlling the radiance inside the integrating sphere light source to be a fixed value through an internal power control device, so that the situation that the on-satellite calibration precision is influenced by the change of the spectral curve when all unscaled channels of the imaging spectrometer are calibrated by the spectral curve of the inverted halogen tungsten lamp light source can be avoided, and the accuracy of the on-satellite calibration of the imaging spectrometer by the on-satellite calibration method of the imaging spectrometer is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a light source of a halogen tungsten lamp according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of an imaging spectrometer on-satellite calibration method according to an embodiment of the present application;
fig. 3 is a spectrum curve of a light source of a tungsten halogen lamp according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the present application provides a halogen tungsten lamp light source, which is applied to imaging spectrometer star calibration, as shown in fig. 1, and includes: the device comprises an integrating sphere light source, a collimation system 3, a reflector 4, a diffuse reflection plate 5 and a power control device; wherein,
the integrating sphere light source comprises an integrating sphere 1 and a halogen tungsten lamp arranged in the integrating sphere 1 and used for sending detection light, and the inner surface of the integrating sphere 1 is provided with a diffuse reflection coating 10;
the collimation system 3 is used for collimating the detection light to obtain collimated detection light;
the reflector 4 is used for totally reflecting the collimated detection light, so that the collimated detection light vertically enters the diffuse reflection plate 5 to obtain the illumination light emitted by the diffuse reflection plate 5;
the power control device is used for controlling the radiance inside the integrating sphere light source to be a fixed value.
In this embodiment, the light emitted from the tungsten halogen lamp becomes the detection light after being homogenized by the integrating sphere 1, and the detection light is lambertian light (the radiance does not change with the direction) because the inner surface of the integrating sphere 1 has the diffuse reflection coating 10, and the detection light exits after passing through the first aperture stop 8 and the second aperture stop 9 of the integrating sphere 1; the detection light with good lambertian characteristics is collimated by the collimation system 3 and then emitted as a collimated light beam (the collimated detection light) which is uniformly distributed, the collimated detection light is reflected by the reflector 4 and then vertically enters the diffuse reflection plate 5, and the light emitted by the diffuse reflection plate 5 is called as illumination light and is used for providing a light source for a transfer radiometer calibration imaging spectrometer.
In general, the mirror 4 is required to totally reflect the collimated detection light to avoid attenuation of the collimated detection light. In an embodiment of the present application, as shown in fig. 1, total reflection of the collimated detection light is achieved by attaching a total reflection film 7 on the surface of the reflector 4. However, in other embodiments of the present application, the total reflection of the collimated detection light may also be achieved by performing a surface treatment on the surface of the reflector 4, which is not limited in the present application and is determined according to the actual situation.
It should be further noted that the power control device may control the radiance inside the integrating sphere light source to a fixed value, and in addition, the characteristic of consistent attenuation of the halogen tungsten lamp on the satellite, so that the spectral curve of the halogen tungsten lamp light source may be kept highly stable, and thus, when the halogen tungsten lamp is used to perform satellite calibration on the imaging spectrometer, an satellite calibration error caused by a change of the spectral curve of the light source may be avoided, thereby improving the accuracy of performing satellite calibration on the imaging spectrometer by using the halogen tungsten lamp.
In an embodiment of the present application, the collimating system 3 is an off-axis parabolic mirror, but in other embodiments of the present application, the collimating system 3 may also be formed by other optical devices, which is not limited in the present application, depending on the actual situation.
On the basis of the above-described embodiments, in one embodiment of the present application, the power control apparatus includes:
a monitor detector 6 for detecting radiance within the integrating sphere light source;
and the power controller 11 is used for adjusting the power of the halogen tungsten lamp according to the radiance detected by the monitoring detector 6 and controlling the radiance in the integrating sphere light source to be a fixed value.
The monitoring detector 6 may be a sensor or other optical device, and the power controller 11 may be a single chip or a microprocessor, which is not limited in this application, depending on the actual situation.
On the basis of the above embodiments, in one embodiment of the present application, as shown in fig. 1, the diffuse reflection plate 5 realizes a diffuse reflection function by coating a diffuse reflection coating 10 on a surface thereof. In other embodiments of the present application, the diffuse reflection plate 5 may also realize a diffuse reflection function by performing a physical treatment on a surface. The present application does not limit this, which is determined by the actual situation.
Correspondingly, the embodiment of the present application further provides an imaging spectrometer on-satellite calibration method, as shown in fig. 2, including:
s101: providing illumination light for a transmission radiometer by using a tungsten halogen lamp light source, wherein the tungsten halogen lamp light source is the tungsten halogen lamp light source in any embodiment, and the transmission radiometer is a transmission radiometer which is traced from a space low-temperature radiometer;
s102: utilizing the transfer radiometer to calibrate a plurality of spectral channels of an imaging spectrometer to obtain spectral responsivity of the plurality of spectral channels;
s103: calculating to obtain a plurality of spectral radiance values according to the spectral responsivity of the plurality of spectral channels and the corresponding reading of the plurality of spectral channels of the imaging spectrometer;
s104: calculating to obtain a spectrum curve of the halogen tungsten lamp light source according to the plurality of spectrum radiance values;
s105: and calculating and obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the spectral curve and the readings of all the unscaled channels of the imaging spectrometer.
It should be noted that, in step S102, the determining manner of the spectral channel selected by the transfer radiometer calibration imaging spectrometer mainly includes: establishing an error equation of a real spectrum curve of the halogen tungsten lamp light source and a spectrum curve fitted through multispectral data; and searching for a global optimal solution of the error equation through a genetic algorithm to determine the spectral channel of the transmission radiometer. Through the process, the error of the spectrum curve of the inverted tungsten halogen lamp can be directly evaluated, and the influence degree of the error introduced by the deviation of the center wavelength of transmitted radiation, the spectral bandwidth and the radiation measurement uncertainty on the fitting precision can also be directly evaluated.
In step S104, a spectrum curve of the light source of the halogen tungsten lamp calculated according to the plurality of spectrum radiance values is shown in fig. 3. The positions marked by the cross lines in fig. 3 are a plurality of spectral radiance values calculated according to the spectral responsivities of the plurality of spectral channels and the readings of the plurality of spectral channels of the corresponding imaging spectrometer.
Compared with sunlight, the tungsten halogen lamp light source has the advantage of smooth spectral curve, so that the difficulty of obtaining the spectral curve of the tungsten halogen lamp light source by utilizing the calculation of the plurality of spectral radiance values is reduced, and the difficulty of an imaging spectrometer on-satellite calibration method utilizing the tungsten halogen lamp light source is reduced.
Furthermore, because the on-satellite attenuation of the halogen tungsten lamp light source is consistent, the spectral curve of the halogen tungsten lamp light source can be kept highly stable by a method of controlling the radiance inside the integrating sphere light source to be a fixed value through an internal power control device, so that the situation that the on-satellite calibration precision is influenced by the change of the spectral curve when all unscaled channels of the imaging spectrometer are calibrated by the spectral curve of the inverted halogen tungsten lamp light source can be avoided, and the accuracy of the on-satellite calibration of the imaging spectrometer by the on-satellite calibration method of the imaging spectrometer is improved.
In addition, since sunlight contains ultraviolet components, the ultraviolet components gradually decompose chemical components of the diffuse reflection plate 5, so that the dichroic reflectivity of the diffuse reflection plate 5 changes, and the change is difficult to be detected quantitatively in space, which also causes the precision of the imaging spectrometer on-satellite calibration by using sunlight as a light source in the prior art to be reduced. And because the imaging spectrometer on-satellite calibration method adopts the halogen tungsten lamp light source to provide illumination light for the transfer radiometer, the situation that the two-way reflectivity of the diffuse reflection plate 5 is changed is avoided, and the on-satellite calibration precision of the imaging spectrometer on-satellite calibration method is further improved.
Based on the foregoing embodiments, in one embodiment of the present application, the formula for obtaining the plurality of spectral radiance values according to the spectral responsivity of the plurality of spectral channels and the corresponding reading of the plurality of spectral channels of the imaging spectrometer is as follows:
wherein L is spectral radiance; v is the spectral channel reading of the imaging spectrometer; ρ is the spectral responsivity.
On the basis of the foregoing embodiment, in another embodiment of the present application, the calculating and obtaining a spectral curve of the light source of the halogen tungsten lamp according to the plurality of spectral radiance values includes:
and calculating to obtain a spectrum curve of the halogen tungsten lamp light source by utilizing an interpolation method according to the plurality of spectrum radiance values.
Since the specific principles of the interpolation are well known to those skilled in the art, the detailed description of the present application is omitted here.
Based on the foregoing embodiments, in one embodiment of the present application, the calculating and obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the spectral curve and the readings of all the unscaled channels of the imaging spectrometer includes:
obtaining radiances of all unscaled channels of the imaging spectrometer according to the spectral curve;
and calculating to obtain the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the radiance of all the unscaled channels of the imaging spectrometer and the reading of all the unscaled channels of the imaging spectrometer.
Specifically, as shown in fig. 3, after the spectral curve is obtained, the radiance L of all the unscaled channels of the imaging spectrometer can be read according to the spectral curve, and then the radiance L of all the unscaled channels of the imaging spectrometer can be read according to the reading V of all the unscaled channels of the imaging spectrometer, that is, according to the formulaCalculating to obtain the spectral responsivity of all the unscaled channels of the imaging spectrometer; wherein L is spectral radiance; v is the spectral channel reading of the imaging spectrometer; ρ is the spectral responsivity.
On the basis of the above embodiments, in a preferred embodiment of the present application, as shown in fig. 3, the wavelength of the illumination light is a characteristic wavelength (characteristic wavelength point in fig. 3) at which the full-spectrum inversion accuracy of the light source of the tungsten halogen lamp is highest.
The reason why the wavelength of the illumination light is selected as the characteristic wavelength of the light source of the tungsten halogen lamp is that the accuracy of obtaining the spectral curve of the light source of the tungsten halogen lamp by calculating (inverting) the radiance value at the characteristic wavelength is the highest. The manner in which the wavelength of the illumination light is selected to be the characteristic wavelength of the light source of the tungsten halogen lamp can be determined by genetic algorithms.
In summary, the embodiment of the present application provides a tungsten halogen lamp light source and an imaging spectrometer on-satellite calibration method, where in the imaging spectrometer on-satellite calibration method, the tungsten halogen lamp light source is used as a calibration light source for calibrating the imaging spectrometer by the transfer radiometer, so as to obtain spectral responsivity of the multiple spectral channels; then, calculating to obtain a plurality of spectral radiance values according to the spectral responsivity of the plurality of spectral channels and the reading of the plurality of spectral channels of the corresponding imaging spectrometer, and calculating to obtain a spectral curve of the halogen tungsten lamp light source by using the plurality of spectral radiance values; and finally, calculating and obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the spectral curve and the readings of all the unscaled channels of the imaging spectrometer. Compared with sunlight, the halogen tungsten lamp light source has the advantage of smooth spectral curve, so that the difficulty of obtaining the spectral curve of the halogen tungsten lamp light source by utilizing the calculation of the plurality of spectral radiance values is reduced, and the difficulty of an imaging spectrometer on-satellite calibration method utilizing the halogen tungsten lamp light source is reduced.
Furthermore, because the on-satellite attenuation of the halogen tungsten lamp light source is consistent, the spectral curve of the halogen tungsten lamp light source can be kept highly stable by a method of controlling the radiance inside the integrating sphere light source to be a fixed value through an internal power control device, so that the situation that the on-satellite calibration precision is influenced by the change of the spectral curve when all unscaled channels of the imaging spectrometer are calibrated by the spectral curve of the inverted halogen tungsten lamp light source can be avoided, and the accuracy of the on-satellite calibration of the imaging spectrometer by the on-satellite calibration method of the imaging spectrometer is improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A kind of halogen tungsten lamp light source, characterized by, apply to the imaging spectrometer and calibrate on the star, comprising: the device comprises an integrating sphere light source, a collimation system, a reflector, a diffuse reflection plate and a power control device; wherein,
the integrating sphere light source comprises an integrating sphere and a halogen tungsten lamp arranged in the integrating sphere and used for sending detection light, and the inner surface of the integrating sphere is provided with a diffuse reflection coating;
the collimation system is used for collimating the detection light to obtain collimated detection light;
the reflector is used for totally reflecting the collimated detection light rays, so that the collimated detection light rays are vertically incident to the diffuse reflection plate, and illumination light rays emitted by the diffuse reflection plate are obtained;
the power control device is used for controlling the radiance inside the integrating sphere light source to be a fixed value.
2. The tungsten halogen lamp light source of claim 1 wherein the power control means comprises:
a monitor detector for detecting radiance within the integrating sphere light source;
and the power controller is used for adjusting the power of the halogen tungsten lamp according to the radiance detected by the monitoring detector and controlling the radiance in the integrating sphere light source to be a fixed value.
3. The light source of claim 1, wherein the reflector surface has a total reflection film.
4. The light source of claim 1, wherein the diffusely reflecting plate has a diffusely reflecting coating on a surface thereof.
5. An imaging spectrometer on-satellite calibration method, comprising:
providing illumination light for a transmission radiometer by using a tungsten halogen lamp light source, wherein the tungsten halogen lamp light source is the tungsten halogen lamp light source of any one of claims 1-4, and the transmission radiometer is a transmission radiometer which is sourced from a space low-temperature radiometer;
utilizing the transfer radiometer to calibrate a plurality of spectral channels of an imaging spectrometer to obtain spectral responsivity of the plurality of spectral channels;
calculating to obtain a plurality of spectral radiance values according to the spectral responsivity of the plurality of spectral channels and the corresponding reading of the plurality of spectral channels of the imaging spectrometer;
calculating to obtain a spectrum curve of the halogen tungsten lamp light source according to the plurality of spectrum radiance values;
and calculating and obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the spectral curve and the readings of all the unscaled channels of the imaging spectrometer.
6. The imaging spectrometer star calibration method according to claim 5, wherein the calculation of the plurality of spectral radiance values from the spectral responsivities of the plurality of spectral channels and the corresponding readings of the plurality of spectral channels of the imaging spectrometer uses the formula:
wherein L is spectral radiance; v is the spectral channel reading of the imaging spectrometer; ρ is the spectral responsivity.
7. The imaging spectrometer on-board calibration method according to claim 5, wherein said calculating a spectral curve of the tungsten halogen lamp light source from the plurality of spectral radiance values comprises:
and calculating to obtain a spectrum curve of the halogen tungsten lamp light source by utilizing an interpolation method according to the plurality of spectrum radiance values.
8. The imaging spectrometer on-board calibration method according to claim 5, wherein the calculating the spectral responsivity of all the unscaled channels of the imaging spectrometer from the spectral curve and the readings of all the unscaled channels of the imaging spectrometer comprises:
obtaining radiances of all unscaled channels of the imaging spectrometer according to the spectral curve;
and calculating to obtain the spectral responsivity of all the unscaled channels of the imaging spectrometer according to the radiance of all the unscaled channels of the imaging spectrometer and the reading of all the unscaled channels of the imaging spectrometer.
9. The imaging spectrometer on-board calibration method according to claim 8, wherein the formula for obtaining the spectral responsivity of all the unscaled channels of the imaging spectrometer by calculating the radiance of all the unscaled channels of the imaging spectrometer and the readings of all the unscaled channels of the imaging spectrometer is as follows:
wherein L is spectral radiance; v is the spectral channel reading of the imaging spectrometer; ρ is the spectral responsivity.
10. The imaging spectrometer on-satellite calibration method according to any one of claims 5 to 9, wherein the wavelength of the illumination light is a characteristic wavelength of the tungsten halogen lamp light source with the highest full-spectral-band inversion accuracy.
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| CN109374550A (en) * | 2018-11-16 | 2019-02-22 | 中国科学院合肥物质科学研究院 | Super-resolution spectrograph spectrum calibration method based on optical transmission spectra |
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| CN112146756A (en) * | 2020-09-21 | 2020-12-29 | 中国科学院长春光学精密机械与物理研究所 | Method, device and system for inverting spectral radiance of on-board lamp-panel system |
| CN112284533A (en) * | 2019-07-24 | 2021-01-29 | 中国科学院上海技术物理研究所启东光电遥感中心 | Radiometer for remote sensor on-orbit atmospheric correction |
| CN113631908A (en) * | 2018-12-21 | 2021-11-09 | 纳米线科技公司 | Method, apparatus, system and device for mobile digital spatial profiling of pathological specimens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323240A (en) * | 2011-07-25 | 2012-01-18 | 中国科学院安徽光学精密机械研究所 | Indoor full-automatic BRDF (bidirectional reflectance distribution function) measurement device |
| US20130003064A1 (en) * | 2011-01-03 | 2013-01-03 | National Institute Of Standards And Technology | Dynamic Spectral Radiance Calibration Source |
| CN103278236A (en) * | 2013-05-16 | 2013-09-04 | 中国科学院长春光学精密机械与物理研究所 | Large visual field optical remote sensing instrument radiation brightness calibrating device |
-
2016
- 2016-08-02 CN CN201610625322.4A patent/CN106017680B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130003064A1 (en) * | 2011-01-03 | 2013-01-03 | National Institute Of Standards And Technology | Dynamic Spectral Radiance Calibration Source |
| CN102323240A (en) * | 2011-07-25 | 2012-01-18 | 中国科学院安徽光学精密机械研究所 | Indoor full-automatic BRDF (bidirectional reflectance distribution function) measurement device |
| CN103278236A (en) * | 2013-05-16 | 2013-09-04 | 中国科学院长春光学精密机械与物理研究所 | Large visual field optical remote sensing instrument radiation brightness calibrating device |
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| CN109405968B (en) * | 2018-10-18 | 2020-10-30 | 中国科学院云南天文台 | Automatic spectrum observation system and control method thereof |
| CN109405968A (en) * | 2018-10-18 | 2019-03-01 | 中国科学院云南天文台 | A kind of automatic spectrum observation system and its control method |
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| CN109342317B (en) * | 2018-11-15 | 2021-04-20 | 中国电子科技集团公司第四十一研究所 | Optical parameter testing device and method for plane black material |
| CN109374550A (en) * | 2018-11-16 | 2019-02-22 | 中国科学院合肥物质科学研究院 | Super-resolution spectrograph spectrum calibration method based on optical transmission spectra |
| CN113631908A (en) * | 2018-12-21 | 2021-11-09 | 纳米线科技公司 | Method, apparatus, system and device for mobile digital spatial profiling of pathological specimens |
| US12002572B2 (en) | 2018-12-21 | 2024-06-04 | Nanostring Technologies, Inc. | Methods, apparatuses, systems and devices for mobile digital spatial profiling of pathological specimens |
| CN112284533A (en) * | 2019-07-24 | 2021-01-29 | 中国科学院上海技术物理研究所启东光电遥感中心 | Radiometer for remote sensor on-orbit atmospheric correction |
| CN110927943A (en) * | 2019-12-26 | 2020-03-27 | 中国科学院长春光学精密机械与物理研究所 | Off-axis three-reflection diffuse reflection plate lighting system |
| CN111982814A (en) * | 2020-08-25 | 2020-11-24 | 合肥泰禾光电科技股份有限公司 | Spectrometer wavelength calibration device |
| CN112146756A (en) * | 2020-09-21 | 2020-12-29 | 中国科学院长春光学精密机械与物理研究所 | Method, device and system for inverting spectral radiance of on-board lamp-panel system |
| CN112146756B (en) * | 2020-09-21 | 2021-06-18 | 中国科学院长春光学精密机械与物理研究所 | Method, device and system for inverting spectral radiance of on-board lamp-panel system |
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