CN114397255B - Wide-spectrum high-resolution video spectrum imaging system and method - Google Patents
Wide-spectrum high-resolution video spectrum imaging system and method Download PDFInfo
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- CN114397255B CN114397255B CN202111340484.0A CN202111340484A CN114397255B CN 114397255 B CN114397255 B CN 114397255B CN 202111340484 A CN202111340484 A CN 202111340484A CN 114397255 B CN114397255 B CN 114397255B
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Abstract
The invention belongs to the technical field of spectrum imaging, and particularly relates to a wide-spectrum high-resolution video spectrum imaging system and method. The technical defects of narrow working band range, less spectrum and low image resolution in the existing video spectrum imaging system based on the pixel coating light-splitting imaging mechanism are overcome. The imaging system comprises a front imaging optical system, a beam splitting component, an area array detector I, an area array detector II and an area array detector III; the incident broadband light beam is divided into two independent working wave bands through the light splitting component, and the two mosaic pixel film coating video multispectral area array detectors II and the area array detector III are respectively adopted for simultaneous reception, so that multispectral images in the working wave band range of 450nm-980nm can be obtained at one time. And (3) obtaining a high-resolution image through the area array detector I, and realizing high-image resolution reconstruction of the mosaic pixel film coating video multispectral area array detectors II and III by utilizing the high-resolution image through an image reconstruction algorithm, so that a high-resolution multispectral image can be finally obtained.
Description
Technical Field
The invention belongs to the technical field of spectrum imaging, and particularly relates to a wide-spectrum high-resolution video spectrum imaging system and method.
Background
The video spectrum imaging technology is a product of combining the imaging technology and the spectrum technology, and the technology plays an irreplaceable role in various application fields such as resource investigation, environment monitoring, agricultural production, biomedicine, medicine sorting, food safety, criminal investigation, judicial identification and the like. With the rapid development of integrated optical, microelectromechanical and precision machining technologies, high resolution, micro spectral imaging technologies have evolved rapidly.
Aiming at the research of light and small video spectrum imaging technology, the current research and application are relatively more of spectrum imaging technology routes based on pixel coating. Although the spectrum imager developed based on the technical route has the outstanding technical characteristics of miniaturization and video spectrum imaging, the technical defects of narrow working band range, less spectrum and low image resolution generally exist, so that the popularization and application of the technology are limited to a certain extent. For example, the IMEC company develops a method based on the coating of the mosaic pixels of the CMOS chip to realize the integrated filtering of the multichannel spectrum. The company provides video spectrum imagers with two mosaic pixel coating films, the visible band spectrum ranges from 460nm to 630nm, the number of spectrum segments is 16, the near infrared band spectrum ranges from 690nm to 975nm, and the number of spectrum segments is 25.
Disclosure of Invention
The invention aims to provide a wide-spectrum high-resolution video spectrum imaging system and a method, which solve the technical defects of narrow working band range, less spectrum and low image resolution in the existing video spectrum imaging system based on a pixel coating light-splitting imaging mechanism, and simultaneously the imaging system provided by the invention has the outstanding advantages of miniaturization and high integration level.
The technical scheme of the invention is as follows:
a wide-spectrum high-resolution video spectrum imaging system is characterized in that: the device comprises a front imaging optical system, a beam splitting assembly, an area array detector I, an area array detector II and an area array detector III;
the front-end imaging optical system is used for imaging a target;
the beam splitting component is arranged between the front imaging optical system and each area array detector and is used for splitting an incident beam to obtain three beams of different wave bandsA light beam with a range of wavelength band lambda S ～λ L Defining a beam I with a band of lambda S ～λ M Is defined as beam II; with a band of lambda M ～λ L Is defined as beam III; wherein lambda is S ＜λ M ＜λ L The wave band range of the incident light beam is the same as that of the light beam I;
the working band range of the area array detector I is lambda S ～λ L For receiving the light beam I to obtain full-color high-resolution image;
the working band range of the area array detector II is lambda S ～λ M For receiving the light beam II, obtaining a coverage lambda S ～λ M Video multispectral images of the working band range;
the working band range of the area array detector III is lambda M ～λ L For receiving light beam III, obtaining coverage lambda M ～λ L Video multispectral image of the operating band range.
Further, the light splitting component is a glued prism component and comprises a first secondary reflection prism, a second secondary reflection prism and a transmission prism;
the AC surface of the first secondary reflection prism is glued with the DE surface of the second secondary reflection prism, and the EF surface of the second secondary reflection prism is glued with the GH surface of the transmission prism; the AC surface of the first secondary reflection prism is plated with a beam splitting film; the EF surface of the second secondary reflection prism is plated with a color separation film;
the AB surface of the first secondary reflection prism is used as an incident surface, the BC surface of the first secondary reflection prism is used as an emergent surface of a light beam I, the DF surface of the second secondary reflection prism is used as an emergent surface of a light beam II, and the PK surface of the transmission prism is used as an emergent surface of a light beam III;
the working band range is lambda S ～λ L The incident light beam of the lens is divided into two part light beams according to a certain beam splitting ratio by a beam splitting film on the AC surface of the first secondary reflecting prism, wherein one part of the light beam, namely the light beam I, reaches the first secondary reflecting prismThe AB surface of the prism emits light from the BC surface to reach the target surface of the area array detector I through the reflection of the AB surface, so that a full-color high-resolution image is obtained; the other part of the light beam reaches the EF surface of the second secondary reflection prism, and the working wave band range is lambda through the color separation film on the EF surface S ～λ L Is divided into an operating band range lambda S ～λ M And lambda (lambda) M ～λ L Wherein the light beam II is reflected by the DE surface of the second secondary reflection prism, and is emitted from the DF surface of the second secondary reflection prism to reach the target surface of the area array detector II, thereby obtaining the coverage lambda S ～λ M Video multispectral images of the working band range; the light beam III reaches the target surface of the area array detector III through the transmission prism to obtain the coverage lambda S ～λ M Video multispectral image of the operating band range.
Further, the front imaging optical system is a transmission type optical path structure, a total reflection type optical path structure or a foldback type optical path structure.
Further, the front imaging optical system is a photographic system, a microscopic system or a telescopic system.
Further, the target surface of the area array detector I is a high-resolution broadband full-color photosensitive detector target surface.
Furthermore, the target surface of the area array detector II and the target surface of the area array detector III are both mosaic pixel film-coated video spectrum imaging detector target surfaces.
The invention also provides a wide-spectrum high-resolution video spectrum imaging method, which is based on a wide-spectrum high-resolution video spectrum imaging system and is characterized by comprising the following steps of:
step 1, obtaining full-color high-resolution image and covering lambda based on a wide-spectrum high-resolution video spectrum imaging system S ～λ M Video multispectral image of working band range and coverage lambda M ～λ L Video multispectral images of the working band range;
step 2, covering lambda with panchromatic high-resolution image pairs S ～λ M Video multispectral image of working band range and coverage lambda M ～λ L View of the operating band rangeAnd carrying out high-resolution reconstruction on the frequency multispectral image to obtain high-resolution multispectral image data.
Further, the step 2 specifically comprises:
step 2.1, extracting the coverage lambda S ～λ M Video multispectral image of working band range and coverage lambda M ～λ L Each single spectral band of image data in the video multispectral image of the operating band range:
respectively setting the central wavelength lambda on the target surface of the area array detector II and the target surface of the area array detector III i The positions corresponding to the pixels of the array are all extracted, so that the center wavelength lambda can be obtained i Is a single-band low-resolution image of (1);
and 2.2, reconstructing the low-resolution image data of each single spectrum segment with the full-color high-resolution image to obtain the high-resolution image data of the spectrum segment.
Further, the step 1 specifically comprises the following steps: the working band range is lambda S ～λ L The incident light beam is divided into two parts of light beams according to a certain beam splitting ratio through a beam splitting film on the AC surface of the first secondary reflecting prism when the incident light beam reaches the first secondary reflecting prism through the front imaging optical system, wherein one part of light beam, namely light beam I, reaches the AB surface of the first secondary reflecting prism, and then exits from the BC surface through the reflection of the AB surface to reach the target surface of the area array detector I, so that a full-color high-resolution image is obtained; the other part of the light beam reaches the EF surface of the second secondary reflection prism, and the working wave band range is lambda through the color separation film on the EF surface S ～λ L Is divided into an operating band range lambda S ～λ M And lambda (lambda) M ～λ L Wherein the light beam II is reflected by the DE surface of the second secondary reflection prism, and is emitted from the DF surface of the second secondary reflection prism to reach the target surface of the area array detector II, thereby obtaining the coverage lambda S ～λ M Video multispectral images of the working band range; the light beam III reaches the target surface of the area array detector III through the transmission prism to obtain the coverage lambda S ～λ M Video multispectral image of the operating band range.
The beneficial effects of the invention are as follows:
1. the invention has a wider operating band range.
According to the invention, the incident broadband light beam is divided into two independent working wave bands through the light splitting component, and the two mosaic pixel film coating video multispectral area array detectors are respectively adopted for simultaneous reception, so that multispectral images in the working wave band range of 450nm-980nm can be obtained at one time.
2. The invention has more spectrum numbers.
The invention divides the incident broadband light beam into two independent working wave bands through the light splitting component, and respectively adopts two mosaic pixel film coating video multispectral area array detectors to simultaneously receive, so that the invention has more spectral band numbers, and can obtain multispectral images of 41 spectral bands at one time.
3. The invention has higher imaging resolution.
According to the invention, an incident light beam is divided into two partial light beams according to a certain proportion through a light splitting component in a system light path, wherein one partial light beam, namely a light beam I, reaches a high-image-resolution full-color photosensitive detector target surface I, high-image-resolution reconstruction of high-image-resolution of mosaic pixel film-coated video multispectral area array detectors II and III is realized by utilizing a high-resolution image on the detector target surface through an image reconstruction algorithm, and finally, a high-resolution multispectral image can be obtained.
4. The invention adopts the common aperture imaging optical system, namely, shares one set of imaging optical system, realizes light splitting through the glued prism component positioned in the emergent light path, and has more compact volume and light structure compared with the technical scheme of multiple lenses.
5. The invention adopts 1 set of wide-spectrum video spectrum imaging system, and can simultaneously obtain 1 full-color high-resolution image and 2 video multispectral images covering different working wave band ranges.
Drawings
FIG. 1 is a schematic diagram of the optical path of a wide-band video spectral imaging system of the present invention;
the reference numerals in the drawings are: the system comprises a 1-front imaging optical system, a 2-gluing prism assembly, a 21-first secondary reflection prism, a 22-second secondary reflection prism, a 23-transmission prism, a 3-area array detector I target surface, a 4-area array detector II target surface and a 5-area array detector III target surface;
FIG. 2 is a schematic diagram of a target surface of an area array detector II in an embodiment;
FIG. 3 is a schematic diagram of a target surface of an area array probe III in an embodiment.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Further, in describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale for convenience of description, and the schematic is only an example, which should not limit the scope of protection of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Also in the description of the present invention, it should be noted that the term "first or second" is used for descriptive purposes only and is not to be construed as indicating or implying relative importance.
The invention discloses a wide-spectrum high-resolution video spectrum imaging system which comprises a front imaging optical system 1, a light splitting component, an area array detector I, an area array detector II and an area array detector III, wherein the front imaging optical system 1 and the light splitting component are sequentially arranged along a light path, and the area array detector I, the area array detector II and the area array detector III are respectively positioned in three outgoing light paths of the light splitting component. The front imaging optical system 1 is used for imaging a target, and can be a transmission type optical path structure, a total reflection type optical path structure or a foldback type optical path structure; the system can be a photographic system, a microscopic system and a telescopic system. The beam splitting component is used for splitting an incident light beam to obtain three light beams with different wave band ranges, and the wave band range is lambda S ～λ L Defining a beam I with a band of lambda S ～λ M Is defined as beam II; with a band of lambda M ～λ L Is defined as beam III; wherein lambda is S ＜λ M ＜λ L The wave band range of the incident light beam is the same as that of the light beam I; as can be seen from fig. 1, the light splitting assembly may be a glued prism assembly 2, although in other embodiments other light splitting structures may be used. The gluing prism assembly 2 comprises a first secondary reflecting prism 21, a second secondary reflecting prism 22 and a transmitting prism 23; the AC face of the first secondary reflecting prism 21 is glued to the DE face of the second secondary reflecting prism 22, and the EF face of the second secondary reflecting prism 22 is glued to the GH face of the transmitting prism 23; the AC surface of the first secondary reflection prism 21 is plated with a beam splitting film; a color separation film is plated on the EF surface of the second secondary reflection prism 22; the AB plane of the first secondary reflecting prism 21 is used as an incident plane, the BC plane of the first secondary reflecting prism 21 is used as an outgoing plane of the light beam I, the DF plane of the second secondary reflecting prism 22 is used as an outgoing plane of the light beam II, and the KP plane of the transmitting prism 23 is used as an outgoing plane of the light beam III. The working band range of the area array detector I is lambda S ～λ L The target surface 3 of the area array detector I is a high-resolution broadband full-color photosensitive detector target, and is arranged in an emergent light path of the first secondary reflection prism 21 and used for receiving the received light beam I to obtain a full-color high-resolution image; the working band range of the area array detector II is lambda S ～λ M Planar array probeThe detector II target surface 4 is a mosaic pixel film-plating video imaging detector target surface and is arranged in an emergent light path of the second secondary reflection prism 22 and used for receiving the light beam II to obtain a coverage lambda S ～λ M Video multispectral images of the working band range; the working band range of the area array detector III is lambda M ～λ L The target surface of the area array detector III is the target surface of a mosaic pixel film-plating video imaging detector, and is arranged in an emergent light path of the transmission prism 23 and used for receiving a light beam III to obtain a coverage lambda M ～λ L Video multispectral image of the operating band range.
The working band range is lambda S ～λ L The incident light beam is divided into two parts of light beams according to a certain light splitting ratio by a light splitting film on the AC surface of the first secondary reflecting prism 21 through the front imaging optical system 1, wherein one part of light beam, namely light beam I, reaches the AB surface of the first secondary reflecting prism 21, and then exits from the BC surface through the reflection of the AB surface to reach the target surface of the area array detector I, so that a full-color high-resolution image is obtained; the other part of the light beam reaches EF face of the second secondary reflecting prism 22, and the working band range is lambda by the color separation film thereon S ～λ L Is divided into an operating band range lambda S ～λ M And lambda (lambda) M ～λ L Wherein the light beam II is reflected by the DE surface of the second secondary reflection prism 22, and is emitted from the DF surface of the second secondary reflection prism 22 to reach the target surface 4 of the area array detector II, thereby obtaining the coverage lambda S ～λ M Video multispectral images of the working band range; the light beam III reaches the target surface 5 of the area array detector III through the transmission prism 23 to obtain a coverage lambda S ～λ M Video multispectral image of the operating band range.
Because of the mosaic pixel coating technology, multispectral images covering a wide working band range are obtained on the area array detector II target surface 4 and the area array detector III target surface 5, and the resolution of the images has a certain loss. However, the image received by the target surface 3 of the area array detector I is a full-color high-resolution image, and the imaging resolution does not have any loss, so that the full-color high-resolution image obtained by the area array detector I can be utilized to carry out high-resolution reconstruction on the multispectral images obtained by the area array detector II and the area array detector III respectively, and high-resolution multispectral image data can be obtained.
Examples
The embodiment discloses a video spectrum forming system covering visible near infrared bands, which is implemented by the following steps:
the working wave band range of the incident light beam is 450nm-980nm, and the visible near infrared wave band is covered. The glue prism assembly 2 is reached by the front imaging optical system 1. The spectral ratio of the spectral film plated on the AC surface of the first secondary reflection prism 21 is 3:7, that is, 30% reflection, 70% transmission, and the spectral ratio is not limited to this ratio, and can be adjusted according to practical situations. The energy of 30% of the incident beam reaches the AB surface of the first secondary reflecting prism 21, and then is emitted from the BC surface to reach the target surface 3 of the area array detector I through the reflection of the AB surface, so that a full-color high-resolution image is obtained; the incident beam energy with 70% transmission reaches the EF surface of the second secondary reflection prism 22, and the color separation film plated on the EF surface of the second secondary reflection prism 22 divides the incident beam wave band range from 450nm to 980nm into two wave band ranges from 450nm to 600nm and from 690nm to 980nm, and the color separation wave band is not limited to the wave band division mode and can be adjusted according to actual conditions. The light beam with the wave band range of 450nm-600nm is reflected by the DE surface of the second secondary reflecting prism 22 and emitted from the DF surface to reach the target surface 4 of the 16-spectrum mosaic pixel coating area array detector, so that the 16-spectrum multispectral image with the working wave band range of 450nm-600nm is obtained. A schematic diagram of a target surface 4 of the 16-spectrum mosaic pixel coating area array detector is shown in fig. 2, wherein 4×4 pixels are a group, the central wavelengths are respectively 450nm, 460nm, 470nm, 480nm, 490nm, 500nm, 510nm, 520nm, 530nm, 540nm, 550nm, 560nm, 570nm, 580nm, 590nm and 600nm, 16 spectral channels are total, each channel corresponds to a single-spectrum image, and the central wavelength position is not limited to the above, and can be adjusted according to practical situations. The light beam in the 690nm-980nm wave band range reaches the target surface 5 of the mosaic pixel coating area array detector III in the 25-spectrum band through the transmission prism 23, and a multispectral image in the 25-spectrum band in the 690nm-980nm working wave band range is obtained. A schematic diagram of a target surface 5 of the 25-spectrum mosaic pixel coating area array detector III is shown in FIG. 3, wherein 5×5 pixels are a group, the central wavelengths are 690nm, 702nm, 714nm, 726nm, 738nm, 750nm, 762nm, 774nm, 786nm, 798nm, 810nm, 822nm, 834nm, 846nm, 858nm, 870nm, 882nm, 896nm, 908mn, 920nm, 932nm, 944nm, 956nm, 968nm and 980nm respectively, each channel corresponds to one single-spectrum image, and the central wavelength position is not limited to this and can be adjusted according to practical situations.
The center wavelength lambda of the plane array detector II target surface 4 and the plane array detector III target surface 5 i The positions corresponding to the pixels of the array are all extracted, so that the center wavelength lambda can be obtained i And reconstructing the single-spectrum low-resolution image with the full-color high-resolution image received by the target surface I of the area array detector to obtain high-resolution image data of the spectrum.
Claims (9)
1. A wide-band high-resolution video spectral imaging system, characterized by: the device comprises a front imaging optical system (1), a beam splitting component, an area array detector I, an area array detector II and an area array detector III;
the front-end imaging optical system (1) is used for imaging a target;
the beam splitting component is arranged between the front imaging optical system (1) and each area array detector and is used for splitting an incident beam to obtain three beams with different wave band ranges, and the wave band range is lambda S ～λ L Defining a beam I with a band of lambda S ～λ M Is defined as beam II; with a band of lambda M ～λ L Is defined as beam III; wherein lambda is S ＜λ M ＜λ L The method comprises the steps of carrying out a first treatment on the surface of the The wave band range of the incident light beam is the same as that of the light beam I;
the light splitting component is a glued prism component (2) and comprises a first secondary reflection prism (21), a second secondary reflection prism (22) and a transmission prism (23);
the AC surface of the first secondary reflection prism (21) is glued with the DE surface of the second secondary reflection prism (22), and the EF surface of the second secondary reflection prism (22) is glued with the GH surface of the transmission prism (23); an AC surface of the first secondary reflection prism (21) is plated with a light splitting film; a color separation film is plated on the EF surface of the second secondary reflection prism (22);
the AB surface of the first secondary reflection prism (21) is used as an incident surface, the BC surface of the first secondary reflection prism (21) is used as an emergent surface of a light beam I, the DF surface of the second secondary reflection prism (22) is used as an emergent surface of a light beam II, and the PK surface of the transmission prism (23) is used as an emergent surface of a light beam III;
the working band range of the area array detector I is lambda S ～λ L For receiving the light beam I to obtain full-color high-resolution image;
the working band range of the area array detector II is lambda S ～λ M For receiving the light beam II, obtaining a coverage lambda S ～λ M Video multispectral images of the working band range;
the working band range of the area array detector III is lambda M ～λ L For receiving light beam III, obtaining coverage lambda M ～λ L Video multispectral image of the operating band range.
2. The wide-band high-resolution video spectral imaging system of claim 1, wherein: the working band range is lambda S ～λ L The incident light beam is divided into two parts of light beams according to a certain light splitting ratio through a light splitting film on an AC surface of the first secondary reflecting prism (21) when reaching the first secondary reflecting prism (21) through the front imaging optical system (1), wherein one part of light beams, namely light beam I, reaches an AB surface of the first secondary reflecting prism (21), and then exits from the BC surface to reach a target surface of an area array detector I through reflection of the AB surface, so that a full-color high-resolution image is obtained; the other part of the light beam reaches EF face of the second secondary reflecting prism (22) and the working band range is lambda by the color separation film S ～λ L Is divided into an operating band range lambda S ～λ M And lambda (lambda) M ～λ L Wherein the light beam II is reflected by the DE surface of the second secondary reflection prism (22) and is emitted from the DF surface of the second secondary reflection prism (22) toReaching the target surface (4) of the area array detector II to obtain coverage lambda S ～λ M Video multispectral images of the working band range; the light beam III reaches the target surface (5) of the area array detector III through a transmission prism (23) to obtain a coverage lambda S ～λ M Video multispectral image of the operating band range.
3. The wide-band high-resolution video spectral imaging system of claim 2, wherein: the front imaging optical system (1) is of a transmission type optical path structure, a total reflection type optical path structure or a foldback type optical path structure.
4. The wide-band high-resolution video spectral imaging system of claim 3, wherein: the front imaging optical system (1) is a photographing system, a microscopic system or a telescopic system.
5. The wide-band high-resolution video spectral imaging system according to any one of claims 1-4, wherein: the target surface (3) of the area array detector I is a high-resolution broadband full-color photosensitive detector target surface.
6. The wide-band high-resolution video spectral imaging system of claim 5, wherein: the target surface (4) of the area array detector II and the target surface (5) of the area array detector III are both mosaic pixel film coating video spectrum imaging detector target surfaces.
7. The wide-spectrum high-resolution video spectrum imaging method is based on a wide-spectrum high-resolution video spectrum imaging system and is characterized by comprising the following steps of:
step 1, obtaining full-color high-resolution image and covering lambda based on a wide-spectrum high-resolution video spectrum imaging system S ～λ M Video multispectral image of working band range and coverage lambda M ～λ L Video multispectral images of the working band range;
step 2, covering lambda with panchromatic high-resolution image pairs S ～λ M Video multi-band range of operationSpectral image and overlay lambda M ～λ L And carrying out high-resolution reconstruction on the video multispectral image in the working band range to obtain high-resolution multispectral image data.
8. The method for imaging a wide-band high-resolution video spectrum according to claim 7, wherein step 2 specifically comprises:
step 2.1, extracting the coverage lambda S ～λ M Video multispectral image of working band range and coverage lambda M ～λ L Each single spectral band of image data in the video multispectral image of the operating band range:
extracting the center wavelength lambda of the area array detector II target surface 4 and the area array detector III target surface 5 respectively i Corresponding to the picture elements of (1) to obtain a center wavelength lambda i Is a single-band low-resolution image of (1);
and 2.2, reconstructing the low-resolution image data of each single spectrum segment with the full-color high-resolution image to obtain the high-resolution image data of the spectrum segment.
9. The method for imaging a wide-spectrum high-resolution video spectrum according to claim 8, wherein step 1 specifically comprises: the working band range is lambda S ～λ L The incident light beam is divided into two parts of light beams according to a certain light splitting ratio through a light splitting film on an AC surface of the first secondary reflecting prism (21) when reaching the first secondary reflecting prism (21) through the front imaging optical system (1), wherein one part of light beams, namely light beam I, reaches an AB surface of the first secondary reflecting prism (21), and then exits from the BC surface to reach a target surface of an area array detector I through reflection of the AB surface, so that a full-color high-resolution image is obtained; the other part of the light beam reaches EF face of the second secondary reflecting prism (22) and the working band range is lambda by the color separation film S ～λ L Is divided into an operating band range lambda S ～λ M And lambda (lambda) M ～λ L Wherein the light beam II is reflected by the DE surface of the second secondary reflection prism (22) and exits from the DF surface of the second secondary reflection prism (22) to reach the surfaceThe array detector II target surface (4) is covered with lambda S ～λ M Video multispectral images of the working band range; the light beam III reaches the target surface (5) of the area array detector III through a transmission prism (23) to obtain a coverage lambda S ～λ M Video multispectral image of the operating band range.
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