Double-view-field hyperspectral atmosphere remote sensing detection system and detection method

Abstract

According to the double-view-field hyperspectral atmosphere remote sensing detection system and detection method provided by the invention, a panoramic camera images an incident light beam into a central hot spot and a circular ring, the central hot spot is detection data of a nadir view field, the circular ring is detection data of a limb view field, and signal light output by the panoramic camera enters an integral view field unit; the integral view field unit enables continuous seamless collection and rearrangement of an incident signal light view field, the signal light passing through the integral view field unit enters the collimation unit through the slit, and the signal light collimated by the collimation unit is transmitted to the grating for spectrum splitting. According to the detection system and method, the panorama camera and the integral view field unit are adopted, the multi-long-slit Offner spectrograph is matched, and nadir and limb double-view-field wide spectral range and high spectral resolution observation is achieved.

Description

Technical Field

[0001] The present application relates to the field of atmospheric detection technology, and in particular to a dual-field-of-view hyperspectral atmospheric remote sensing detection system and a detection method. Background Art

[0002] At present, there are many technical means applied to the field of atmospheric detection, such as optical technology, chemical analysis, mass spectrometry and ultrasonic technology. Among them, using the research results of optical technology, a variety of atmospheric optical detection methods have been developed. The remote sensing technology in atmospheric optical detection technology uses the properties of the detected substances (such as aerosols, water vapor and clouds) to analyze and invert the reflection, refraction, scattering and absorption of light sources such as the sun or other stars. Different substances have different effects on spectra of different bands, so the required atmospheric parameter information can be inverted. The research of this invention is of great significance in accurately assessing the impact of global atmospheric changes, and will provide direct detection data and scientific basis for predicting and intervening in global climate change trends.

[0003] The detection methods of space-based atmospheric remote sensing are generally divided into: nadir detection and limb detection. Both detection methods have their own advantages and disadvantages. Nadir detection is often used to detect the total amount of the atmosphere, but the vertical resolution of this method is low, and it is difficult to obtain the changes in the concentrations of different atmospheric components at different altitudes. Limbar detection is often used to detect the stratified changes in the atmosphere. Compared with nadir observation, limb atmospheric detection has a very high vertical resolution, and the received radiation comes from the atmosphere and will not be affected by the underlying surface, but the slice-type observation method also makes it difficult to detect the total amount of the atmosphere below a certain altitude layer. In the future, multi-mode combined detection will become the mainstream method of space-based atmospheric remote sensing detection.

[0004] At present, in the field of limb detection, most of the satellite-borne atmospheric remote sensing instruments detect a certain direction of the limb atmosphere, and only a few instruments detect in multiple directions. An important shortcoming of these detection instruments is that they can only obtain data on a very narrow strip, and there are large gaps between adjacent detection directions, which makes it impossible to obtain dense temporal and spatial coverage, and thus it is difficult to achieve real-time comparison of the atmosphere in different directions around the world. In addition, both satellite-borne atmospheric detection methods have their own advantages and disadvantages. Among them, limb detection is often used to invert the layered profile of the atmosphere, and nadir detection is used to invert the total atmospheric volume characteristics. In order to obtain more comprehensive detection data and meet the needs of quantitative remote sensing, it is necessary to combine the data obtained by different detection methods. In previous atmospheric remote sensing, two remote sensing instruments were used to obtain nadir and limb data. However, the space on the satellite is limited, and the use of multiple space instruments is bound to increase costs. At present, among the publicly reported atmospheric remote sensing payloads in the international and domestic literature, there is no optical payload that has the ability to simultaneously obtain all-round limb coverage and nadir coverage data. Summary of the invention

[0005] In view of this, it is necessary to provide a dual-field-of-view hyperspectral atmospheric remote sensing detection system and detection method that can simultaneously obtain all-round edge coverage and nadir coverage data to address the defects in the prior art.

[0006] To solve the above problems, this application adopts the following technical solutions:

[0007] One of the purposes of the present application is to provide a dual-field-of-view hyperspectral atmospheric remote sensing detection system, comprising: a panoramic camera (1), an integral field-of-view unit (2), an optical fiber bundle (3), a slit (4), a collimation unit (5), a grating (6), an imaging unit (7) and a planar array detector (8), wherein:

[0008] The panoramic camera (1) images the incident light beam into a central bright spot and a circular ring, wherein the central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view. The signal light output by the panoramic camera (1) enters the integral field of view unit (2), and the integral field of view unit (2) enables continuous and seamless collection and rearrangement of the incident signal light field of view. The signal light passing through the integral field of view unit (2) is then incident on the collimation unit (5) through the slit (4). The signal light collimated by the collimation unit (5) is then transmitted to the grating (6) for spectral splitting. The split light signals of each spectral band are imaged at different positions of the planar array detector (8) through the imaging unit (7).

[0009] In some embodiments, the panoramic camera (1) comprises a front lens group (11), a panoramic annular lens (12) and a relay lens group (13); the signal light of the nadir field of view is transmitted through the front lens group (11) and the panoramic annular lens (12) in sequence and enters the relay lens group (13); the signal light of the limbus field of view is reflected by the outer annular region of the panoramic annular lens (12) and then enters the relay lens group (13); the signal light of the nadir field of view and the signal light of the limbus field of view incident on the relay lens group (13) are simultaneously transmitted through the relay lens group (13) and imaged on the image plane to form the central bright spot and the circular ring.

[0010] In some of the embodiments, the size of the central bright spot is determined by the focal length and the coverage, the radial direction of the limb of the ring corresponds to different limb heights, and the annular image corresponds to 360° all-round atmospheric data.

[0011] In some of the embodiments, the incident light beam of the panoramic camera (1) is natural light with a wavelength of 400-1100nm and a bandwidth of 700nm.

[0012] In some of the embodiments, the integral field of view unit (2) is formed by coupling a microlens array with an optical fiber array.

[0013] In some of the embodiments, the slits (4) are composed of a double slit array arranged by a single linear array optical fiber, and each of the two groups of slits is 50 mm long.

[0014] In some of the embodiments, the slits (4), the collimating unit (5), the grating (6), the imaging unit (7) and the planar array detector (8) form a spectrometer, and the spectrometer simultaneously images the light input from the two groups of slits, and images the light at different positions on the planar array detector (8), and the spectral data corresponding to different columns of pixels on the image plane of the spectrometer are rearranged in a set order.

[0015] The second object of the present application is to provide a detection method of the dual-field-of-view hyperspectral atmospheric remote sensing detection system, comprising the following steps:

[0016] The panoramic camera (1) images the incident light beam into a central bright spot and a circular ring, wherein the central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view;

[0017] The signal light output by the panoramic camera (1) enters the integral field of view unit (2), and the integral field of view unit (2) enables continuous and seamless acquisition and rearrangement of the incident signal light field of view;

[0018] The signal light passing through the integrating field of view unit (2) is then incident on the collimating unit (5) through the slit (4);

[0019] The signal light collimated by the collimation unit (5) is then transmitted to the grating (6) for spectral splitting;

[0020] The split light signals in each spectrum band are imaged at different positions of the planar array detector (8) by the imaging unit (7).

[0021] This application adopts the above technical solution, and its beneficial effects are as follows:

[0022] The present application provides a dual-field-of-view hyperspectral atmospheric remote sensing detection system and detection method. The panoramic camera (1) images an incident light beam into a central bright spot and a circular ring. The central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view. The signal light output by the panoramic camera (1) enters the integral field of view unit (2). The integral field of view unit (2) enables continuous and seamless collection and rearrangement of the incident signal light field of view. The signal light passing through the integral field of view unit (2) is then incident on the collimation unit (5) through the slit (4). The signal light collimated by the collimation unit (5) is then transmitted to the grating (6) for spectral splitting. The split light signals of each spectral band are imaged at different positions of the array detector (8) through the imaging unit (7). The detection system and method adopted by the present application adopt a panoramic camera and an integral field of view unit, in conjunction with a multi-slit Offner spectrometer, to achieve wide spectral range and high spectral resolution observation of the nadir and limb dual fields of view.

[0023] In addition, the dual-field-of-view hyperspectral atmospheric remote sensing detection system and detection method provided by the present application can realize convenient, fast, accurate and efficient experimental detection by transmitting optical signals using optical fiber technology. The optical fiber coupling efficiency introduced by the optical fiber spectrometer is high and the power loss is low. The optical fiber transmission of optical signals avoids interference from external electromagnetic fields and other signals, environmental moisture and corrosion interference, etc., and is combined with a multi-slit Offner spectrometer to realize the miniaturization and lightweight of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 A schematic diagram of the structure of a dual-field-of-view hyperspectral atmospheric remote sensing detection system provided in an embodiment of the present application.

[0026] Figure 2 A schematic diagram of the optical path of a panoramic camera provided in an embodiment of the present application.

[0027] Figure 3 A flow chart of the detection method steps of a dual-field-of-view hyperspectral atmospheric remote sensing detection system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0028] Embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be construed as limiting the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] In order to make the objectives, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0032] See also Figure 1 , which is a schematic diagram of the structure of a dual-field-of-view hyperspectral atmospheric remote sensing detection system provided in Example 1 of the present application, including a panoramic camera 1, an integral field-of-view unit 2, an optical fiber bundle 3, a slit 4, a collimation unit 5, a grating 6, an imaging unit 7, and a planar array detector 8. The connection relationship of each component and its implementation method are described in detail below.

[0033] See also Figure 3 , is a schematic diagram of the structure of a panoramic camera 1 provided in this embodiment, wherein the panoramic camera 1 is used to image an incident light beam into a central bright spot A and a circular ring B, wherein the central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view, and comprises a front lens group 11, a panoramic annular lens 12 and a relay lens group 13.

[0034] Specifically, the signal light of the nadir field of view sequentially transmits the front lens group 11 and the panoramic annular lens 12 to enter the relay lens group 13; the signal light of the limbal field of view is reflected by the outer annular area of ​​the panoramic annular lens 12 and then enters the relay lens group 13; the signal light of the nadir field of view and the signal light of the limbal field of view that enter the relay lens group 13 simultaneously pass through the relay lens group 13 and are imaged on the image plane to form the central bright spot and the circular ring.

[0035] In this embodiment, the size of the central bright spot is determined by the focal length and the coverage range, the radial direction of the limb of the ring corresponds to different limb heights, and the annular image corresponds to 360° all-round atmospheric data.

[0036] In this embodiment, the integral field of view unit 2 is formed by coupling a microlens array with an optical fiber array, thereby ensuring continuous and seamless acquisition and rearrangement of the field of view.

[0037] In this embodiment, the slits 4 are composed of a double slit array arranged by a single linear array optical fiber, and the two groups of slits are each 50 mm long, which greatly increases the number of image plane pixels and effectively improves the dynamic range of the instrument.

[0038] It can be understood that the panoramic annular lens 12 used in this embodiment can realize 360° all-round high-temporal and spatial coverage of atmospheric limb tomography detection. The front lens group 11 is used to introduce the nadir field of view. The image plane formed after imaging by the relay lens group 13 is a central bright spot and a circular ring. The central bright spot is the detection data of the nadir field of view, and the size of the bright spot is determined by the focal length and the coverage range. The circular ring is the detection data of the limb field of view. The radial direction of the limb corresponds to different limb heights, and the annular image corresponds to 360° all-round atmospheric data. However, since the image plane obtained by this detection method is not in the shape of a long strip, a conventional slit cannot be placed on the image plane. Fiber optic light transmission provides the flexibility of selecting the output position, and can realize that the light of all spatial pixels is output on the slit at the output end of the optical fiber. The method of using a microlens array-fiber optic integral field of view unit to transmit light through an optical fiber bundle not only makes full use of the detector, but also allows a longer spectral bandpass time.

[0039] The dual-field-of-view hyperspectral atmospheric remote sensing detection system provided in the above embodiment of the present application works as follows:

[0040] The panoramic camera 1 images the incident light beam into a central bright spot and a circular ring, wherein the central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view. The signal light output by the panoramic camera 1 enters the integral field of view unit 2, and the integral field of view unit 2 enables continuous and seamless collection and rearrangement of the incident signal light field of view. The signal light passing through the integral field of view unit 2 is then incident on the collimation unit 5 through the slit 4. The signal light collimated by the collimation unit 5 is then transmitted to the grating 6 for spectral splitting. The split light signals of each spectral band are imaged at different positions of the planar array detector 8 through the imaging unit 7.

[0041] It can be understood that the light beam of the present application, which passes through the main structure of the annular limbal field of view, is reflected by the panoramic annular lens 12 and then imaged on the image plane by the relay lens group 13. The outer annular area of ​​the panoramic annular lens 12, which is far from the optical axis, is responsible for reflecting the light beam of the limbal field of view into the relay lens group 13, while the central area close to the optical axis maintains the transmission characteristics of the light beam by digging holes or other means. Due to the unique structure of the panoramic annular lens 12, the imaging area is an annular field of view, that is, an all-round limbal field of view. The imaging area of ​​the nadir field of view is close to the optical axis, and the front lens group 11 is placed before the panoramic annular lens 12. Its main function is to introduce the light beam of the nadir field of view and ensure its focal length requirements. The nadir field of view and the limbal field of view share the relay lens group 13 and the array detector 8. The central bright spot is the detection data of the nadir field of view, and the size of the bright spot is determined by the focal length and coverage range. The optical signal collected by the panoramic camera 1 passes through the integral field of view unit 2 of the focal plane-coupled specifically distributed microlens-fiber array. The optical fiber performs single-line array sampling on the image plane of the panoramic camera. The collected single-line array optical fiber is arranged in a multi-long slit array. After being collimated by the collimation unit 5, the imaging unit 6 simultaneously images the light input from multiple groups of long slits, and the images are formed at different positions of the same surface array detector 8.

[0042] In this embodiment, the slit 4, the collimating unit 5, the grating 6, the imaging unit 7 and the planar array detector 8 constitute a spectrometer. The spectrometer simultaneously images the light input from the two groups of slits and images at different positions on the planar array detector 8. The spectral data corresponding to different columns of pixels on the image plane of the spectrometer are rearranged in a set order.

[0043] It can be understood that after the spectral data corresponding to different columns of pixels on the spectrometer image plane are rearranged in a set order, imaging spectral detection can be realized, and segmented multiplexing of the spectral dimension of a single-chip detector can be achieved, thereby maximizing the expansion of detector format resources.

[0044] See also Figure 3 , the detection method of the dual-field-of-view hyperspectral atmospheric remote sensing detection system provided in the embodiment of the present application includes the following steps S110 to S140, which are specifically as follows:

[0045] Step S110: the panoramic camera 1 images the incident light beam into a central bright spot and a circular ring, wherein the central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view.

[0046] Step S120: the signal light output by the panoramic camera 1 enters the integral field of view unit 2, and the integral field of view unit 2 enables continuous and seamless acquisition and rearrangement of the incident signal light field of view;

[0047] Step S130: the signal light passing through the integrating field unit 2 is incident on the collimating unit 5 through the slit 4;

[0048] Step S140: the signal light collimated by the collimation unit 5 is then transmitted to the grating 6 for spectral splitting;

[0049] Step S150 : the split light signals in each spectral band are imaged at different positions of the planar array detector 8 by the imaging unit 7 .

[0050] The detailed working method thereof can be referred to the dual-field-of-view hyperspectral atmospheric remote sensing detection system provided in the above embodiment, which will not be described in detail here.

[0051] The present application provides a dual-field-of-view hyperspectral atmospheric remote sensing detection system and detection method, wherein the panoramic camera 1 images an incident light beam into a central bright spot and a circular ring, wherein the central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view, and the signal light output by the panoramic camera 1 enters the integral field of view unit 2, and the integral field of view unit 2 enables continuous and seamless collection and rearrangement of the incident signal light field of view, and the signal light passing through the integral field of view unit 2 is then incident on the collimation unit 5 through the slit 4, and the signal light collimated by the collimation unit 5 is then transmitted to the grating 6 for spectral splitting, and the split light signals of each spectral band are imaged at different positions of the planar array detector 8 by the imaging unit 7. The detection system and method adopted in the present application realize the collection of the nadir and limb dual fields of view by adopting a panoramic lens, so that the nadir field of view and the limb field of view share a set of imaging lens groups and image plane detectors, thereby greatly reducing the complexity of the overall system. The integral field of view unit of the microlens array-optical fiber is used to transmit the optical signal to the spectrometer for spectral analysis. The long slit ensures that the spectrometer can couple enough optical fibers. The integral field of view imaging spectrometer can simultaneously obtain full-band, high-spectral resolution spectral data for a specific nadir and limb field of view in a single exposure, eliminating the information loss that may be caused by conventional slits and improving light efficiency.

[0052] In addition, the dual-field-of-view hyperspectral atmospheric remote sensing detection system and detection method provided by the present application can realize convenient, fast, accurate and efficient experimental detection by transmitting optical signals using optical fiber technology. The optical fiber coupling efficiency introduced by the optical fiber spectrometer is high and the power loss is low. The optical fiber transmission of optical signals avoids interference from external electromagnetic fields and other signals, environmental moisture and corrosion interference, etc., and is combined with a multi-slit Offner spectrometer to realize the miniaturization and lightweight of the overall structure.

[0053] The above technical solution of the present application is described below in conjunction with specific embodiments.

[0054] Example

[0055] The input signal light is natural light with a wavelength of 400-1100nm and a bandwidth of 700nm. After the signals of the nadir field of view and the limb field of view enter the panoramic camera 1, they are finally imaged on the image plane as a central bright spot and a circular ring. The central bright spot is the detection data of the nadir field of view, and the size of the bright spot is determined by the focal length and coverage. The circular ring is the detection data of the limb field of view. The radial direction of the limb corresponds to different limb heights, and the annular image corresponds to 360° all-round atmospheric data. The signal light output by the panoramic camera 1 passes through the focal plane coupled specific distribution microlens-fiber array integral field of view unit 2. The integral field of view unit 2 is composed of a microlens array and a fiber array coupled, which can ensure continuous and seamless acquisition and rearrangement of the field of view. The optical fiber performs single-line array sampling on the image plane of the panoramic camera 1 and then transmits it to the slit 4 through the optical fiber bundle 3. The slit is composed of a double slit array arrangement of the collected single-line array optical fiber. The two sets of slits are 50mm long each, which greatly increases the use of the number of image pixels and effectively improves the dynamic range of the instrument. The light output from the slit 4 enters the collimation system 5 and is transmitted to the spectroscopic device grating 6 for spectral splitting. The split light signals of each spectral band are imaged on the array detector 8 via the imaging system 7. The spectrometer part is composed of the slit 4, the collimation system 5, the grating 6, the imaging system 7 and the array detector 8. The light input from the two groups of long slits is imaged at the same time, and finally imaged at different positions on the same array detector 8. After the spectral data corresponding to different columns of pixels on the spectrometer image plane are rearranged in the set order, imaging spectral detection can be realized, and the spectral dimension segmentation multiplexing of the single-chip detector is realized, so as to maximize the expansion of detector format resources.

[0056] It can be understood that the technical features of the above-described embodiments can be arbitrarily combined. In order to make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above are only preferred embodiments of the present application, and only specifically describe the technical principles of the present application. These descriptions are only for explaining the principles of the present application and cannot be interpreted as limiting the scope of protection of the present application in any way. Based on the explanation here, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application, and other specific implementation methods of the present application that can be associated with the technicians in this field without creative work, should be included in the scope of protection of the present application.

Claims

1. A dual-field-of-view hyperspectral atmospheric remote sensing detection system, characterized in that: include: A panoramic camera (1), an integral field of view unit (2), an optical fiber bundle (3), a slit (4), a collimation unit (5), a grating (6), an imaging unit (7) and a planar array detector (8), wherein: The panoramic camera (1) images the incident light beam into a central bright spot and a circular ring, wherein the central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view. The signal light output by the panoramic camera (1) enters the integral field of view unit (2), and the integral field of view unit (2) enables continuous and seamless collection and rearrangement of the incident signal light field of view. The signal light passing through the integral field of view unit (2) is then incident on the collimation unit (5) through the slit (4). The signal light collimated by the collimation unit (5) is then transmitted to the grating (6) for spectral splitting. The split light signals of each spectral band are imaged at different positions of the planar array detector (8) through the imaging unit (7).

2. The dual-field-of-view hyperspectral atmospheric remote sensing detection system according to claim 1, characterized in that: The panoramic camera (1) comprises a front lens group (11), a panoramic annular lens (12) and a relay lens group (13); signal light of a nadir field of view sequentially transmits through the front lens group (11) and the panoramic annular lens (12) to enter the relay lens group (13); signal light of a limbal field of view is reflected by an outer annular region of the panoramic annular lens (12) and then enters the relay lens group (13); signal light of a nadir field of view and signal light of a limbal field of view incident on the relay lens group (13) simultaneously transmit through the relay lens group (13) and are imaged on an image plane to form the central bright spot and the circular ring.

3. The dual-field-of-view hyperspectral atmospheric remote sensing detection system according to claim 2, characterized in that: The size of the central bright spot is determined by the focal length and the coverage range. The radial direction of the limb of the ring corresponds to different limb heights. The annular image corresponds to 360° all-round atmospheric data.

4. The dual-field-of-view hyperspectral atmospheric remote sensing detection system according to claim 1, characterized in that: The panoramic camera (1) receives natural light as the incident light beam, with a wavelength of 400-1100 nm and a bandwidth of 700 nm.

5. The dual-field-of-view hyperspectral atmospheric remote sensing detection system according to claim 1, characterized in that: The integral field of view unit (2) is formed by coupling a microlens array with an optical fiber array.

6. The dual-field-of-view hyperspectral atmospheric remote sensing detection system according to claim 1, characterized in that: The slits (4) are composed of a double slit array arranged by a single linear array optical fiber, and the two groups of slits are each 50 mm long.

7. The dual-field-of-view hyperspectral atmospheric remote sensing detection system according to claim 6, characterized in that: The slits (4), the collimating unit (5), the grating (6), the imaging unit (7) and the planar array detector (8) form a spectrometer. The spectrometer simultaneously images light input from two groups of slits and images light at different positions on the planar array detector (8). Spectral data corresponding to different columns of pixels on the image plane of the spectrometer are rearranged in a set order.

8. A detection method of a dual-field-of-view hyperspectral atmospheric remote sensing detection system as claimed in claim 1, characterized in that: The steps include: The panoramic camera (1) images the incident light beam into a central bright spot and a circular ring, wherein the central bright spot is the detection data of the nadir field of view, and the circular ring is the detection data of the limb field of view; The signal light output by the panoramic camera (1) enters the integral field of view unit (2), and the integral field of view unit (2) enables continuous and seamless acquisition and rearrangement of the incident signal light field of view; The signal light passing through the integrating field of view unit (2) is then incident on the collimating unit (5) through the slit (4); The signal light collimated by the collimation unit (5) is then transmitted to the grating (6) for spectral splitting; The split light signals in each spectrum band are imaged at different positions of the planar array detector (8) by the imaging unit (7).

Images