CN113551771A

CN113551771A - Mosaic spectrum camera

Info

Publication number: CN113551771A
Application number: CN202111024980.5A
Authority: CN
Inventors: 陈兴海; 李伟; 张卓; 张宏宇; 孙玉琳
Original assignee: Wuxi Spectrum Horizon Technology Co ltd
Current assignee: Wuxi Spectrum Horizon Technology Co ltd
Priority date: 2021-09-02
Filing date: 2021-09-02
Publication date: 2021-10-26

Abstract

The invention discloses a mosaic spectral camera which comprises a light splitting device, wherein the light splitting device comprises a light inlet end, a first light outlet end and a second light outlet end, an imaging lens is arranged at the light inlet end, the first light outlet end is connected with a first detector through a first adjusting device, a first mosaic optical filter is arranged on the light collecting end of the first detector, the second light outlet end is connected with a second detector through a second adjusting device, and a second mosaic optical filter is arranged on the light collecting end of the second detector. Compared with a mechanical switching optical filter spectral camera, the spectral camera can realize real-time imaging and dynamic target detection through the cooperation of the mosaic optical filter and the double detectors, and has higher stability; compared with a spectrum camera with multiple lenses, multiple filters and multiple detectors, the spectrum camera is small in number of accessories and small in size, is convenient to carry, and the two detectors are located in the same field of view, so that processing work such as post-cutting registration of data is not needed.

Description

Mosaic spectrum camera

Technical Field

The invention belongs to the technical field of a spectral camera, and particularly relates to a mosaic spectral camera.

Background

The core technology of the spectral imaging system is to organically combine the traditional two-dimensional imaging remote sensing technology and the spectral technology, obtain the spatial information of a measured object by using the imaging system, decompose the radiation of the measured object into spectral radiation with different wave bands by using the spectrometer system, obtain dozens or even hundreds of continuous narrow wave band information of each pixel element in a spectral interval, and realize the simultaneous acquisition of the geometric characteristics and the spectral characteristics of a target by using the spectral imaging technology.

The existing spectrum camera can sequentially perform imaging by switching optical filters with different wavelengths, but is limited by the size of an instrument, only can perform imaging of a plurality of wave bands, and is not beneficial to dynamic target detection, while the spectrum camera integrated by a plurality of lenses, optical filters and detectors can solve the problem of dynamic target detection to a certain extent, but the integration of a plurality of detectors causes the volume to be huge, and images acquired by the plurality of detectors need post-processing and cannot output results in real time, so that a mosaic spectrum camera is urgently needed to solve the problems.

Disclosure of Invention

The invention aims to provide a mosaic spectral camera to solve the technical problems that the existing mosaic spectral camera cannot carry out dynamic detection on a target, target data are complex to process, and the output of a detection result is slow.

In order to solve the technical problems, the specific technical scheme of the mosaic spectral camera provided by the invention is as follows:

the utility model provides a mosaic spectral camera, includes beam splitting device, beam splitting device is including advancing light end, first light-emitting end and second light-emitting end, it is provided with imaging lens to advance light end department, first light-emitting end department is connected with first detector through first adjusting device, the daylighting end of first detector with first light-emitting end is just to setting up, install first mosaic filter on the daylighting end of first detector, second light-emitting end department is connected with the second detector through second adjusting device, the daylighting end of second detector with second light-emitting end is just to setting up, install second mosaic filter on the daylighting end of second detector, first detector with the data processing module is all connected to the second detector.

Preferably, in order to split the target optical signal into two optical signals, the splitting device is a splitting prism.

Preferably, in order to acquire the short-wave infrared band spectrum data of the target, the first mosaic filter is a short-wave infrared band mosaic filter.

Preferably, in order to acquire the target visible light band spectral data, the second mosaic filter is a visible light band mosaic filter.

Preferably, in order to facilitate the installation of each part of the spectral camera, a support is installed on the beam splitter prism, a front end plate fixed by the support is arranged at the light inlet end of the beam splitter prism, the imaging lens is installed on the front end plate, a housing is connected to the front end plate through screws, the housing is connected with the front end plate to form a cavity, the first detector, the second detector and the beam splitter prism are all arranged inside the cavity, and the imaging lens is arranged outside the cavity.

Preferably, in order to adjust the position of the first detector, the first adjusting device includes a connecting frame fixed to the first detector, the lighting end of the first detector is located inside the connecting frame, the connecting frame is matched with the first light-emitting end of the beam splitter prism, the first light-emitting end of the beam splitter prism extends to the inside of the connecting frame, each side edge of the connecting frame is connected with a first bolt in a threaded manner, and each first bolt abuts against the beam splitter prism.

Preferably, in order to adjust the position of the second detector, the second adjusting device comprises a connecting plate, a strip-shaped groove is formed in the connecting plate, the strip-shaped groove is distributed in the direction perpendicular to the second mosaic filter, a second bolt is arranged in the strip-shaped groove in a sliding mode, and the second bolt is in threaded connection with the support.

The mosaic spectrum camera has the following advantages:

1. the first detector and the second detector can be adjusted to be in the same field of view, so that the imaging lens does not need to use a visible light-short wave infrared full-waveband achromatic lens, and the equipment cost is reduced;

2. compared with a mechanical switching optical filter spectral camera, the mosaic optical filter is matched with the double detectors, so that real-time imaging can be realized, dynamic target detection is performed, and high stability is achieved;

3. compared with a spectrum camera with multiple lenses, multiple filters and multiple detectors, the spectrum camera has the advantages that the number of accessories is small, the size is small, the carrying is convenient, the two detectors are located in the same field of view, and the processing work such as post-cutting registration and the like on data is not needed;

4. compared with the traditional single-detector mosaic spectral camera, the spectral camera can simultaneously acquire target data from a visible light waveband to a short wave infrared waveband, enriches the spectral information of a target, and enlarges the application scene of the mosaic spectral camera.

Drawings

FIG. 1 is a schematic structural diagram of a mosaic spectral camera according to the present invention;

FIG. 2 is a schematic diagram of an internal structure of the mosaic spectral camera according to the present invention;

FIG. 3 is a schematic view of a connection structure of the first detector, the second detector and the beam splitter prism according to the present invention;

FIG. 4 is a schematic view of an installation structure of a first mosaic filter and a second mosaic filter according to the present invention;

the notation in the figure is: 1. an imaging lens; 2. a housing; 3. a support; 4. a second bolt; 5. a second detector; 6. a first detector; 7. a first bolt; 8. a connecting frame; 9. a beam splitter prism; 10. a second mosaic filter; 11. a first mosaic filter; 12. a data processing module; 13. a connecting plate; 14. a front end plate.

Detailed Description

For better understanding of the purpose, structure and function of the present invention, a mosaic spectrum camera of the present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1-4, a spectrum camera includes a beam splitter prism 9, the beam splitter prism 9 can be replaced by a beam splitter, a support 3 is installed on the beam splitter prism 9, a front end plate 14 fixed to the support 3 is installed at a light inlet end of the beam splitter prism 9, an imaging lens 1 is installed on the front end plate 14, a housing 2 is connected to the front end plate 14 through a screw, the housing 2 is connected to the front end plate 14 to form a cavity, a first detector 6, a second detector 5 and the beam splitter prism 9 are all installed inside the cavity, the imaging lens 1 is installed outside the cavity, the beam splitter prism 9 includes a light inlet end, a first light outlet end and a second light outlet end, the light inlet end is opposite to the imaging lens 1, a light outlet end of the first detector 6 is opposite to the first light outlet end, a first mosaic filter 11 is installed on the light outlet end of the first detector 6, the first mosaic filter 11 is a short wave band mosaic filter, a connecting frame 8 fixed on the first detector 6, the lighting end of the first detector 6 is positioned at the inner side of the connecting frame 8, the connecting frame 8 is matched with the first light-emitting end of the beam splitter prism 9, the first light-emitting end of the beam splitter prism 9 extends to the inner side of the connecting frame 8, each side edge of the connecting frame 8 is in threaded connection with a first bolt 7, each first bolt 7 is abutted against the beam splitter prism 9, the lighting end of the second detector 5 is arranged opposite to the second light-emitting end, a second mosaic optical filter 10 is arranged on the lighting end of the second detector 5, the second mosaic optical filter 10 is a visible light band mosaic optical filter, a connecting plate 13 is arranged on the side surface of the second detector 5, a strip-shaped groove is arranged on the connecting plate 13 and is distributed along the direction vertical to the second mosaic optical filter 10, a second bolt 4 slides in the strip-shaped groove, the second bolt 4 is in threaded connection with the bracket 3, the first detector 6 and the second detector 5 are both connected to a data processing module 12.

When the spectral camera is used, the imaging lens 1 collects target information, light is split through the light splitting prism 9, and light signals after light splitting are received by the first detector 6 and the second detector 5 respectively; when the first detector 6 and the second detector 5 are used, firstly, the first detector 6 can move up, down, left and right by adjusting each first bolt 7, the focal length of the first detector 6 is adjusted, and after the first detector 6 is adjusted in place, the first bolts 7 are fastened to fix the first detector 6; then, the second detector 5 is adjusted according to the position of the first detector 6, in the process, the second bolt 4 is loosened, the connecting plate 13 can move along the distribution direction of the strip-shaped grooves, and can also rotate by taking the second bolt 4 as a center, so that the second detector 5 is adjusted to be close to or far away from the beam splitter prism 3 and adjusted in angle, the position of the second detector 5 is adjusted, the image of the first detector 6 and the image of the second detector 5 are differentiated, when the differentiated image is completely black, the first detector 6 and the second detector 5 are in the same visual field, and the second bolt 4 is fastened at the moment, so that the fixed positioning of the second detector 5 is realized; the first mosaic filter 11 enables the first detector 6 to receive data in a short wave infrared band range, the second mosaic filter 10 enables the second detector 5 to receive data in a visible light band range, and as the mosaic filters are coated with band-pass thin films with different central wavelengths on each pixel, the detectors can simultaneously acquire two-dimensional spatial information and one-dimensional spectral information, and the data processing module 12 acquires and stores target data of the first detector 6 and the second detector 5, so that three-dimensional data of a target in the visible light band range and the short wave infrared band range can be simultaneously obtained, and the spectral range and the number of spectral channels are expanded in a dual-camera mode while sufficient spatial resolution is ensured; by replacing mosaic filters with different wave bands, three-dimensional data in different wave band ranges can be acquired simultaneously, and the application range of the spectral camera is expanded.

It is to be understood that the present invention has been described with reference to certain embodiments, and that various changes in the features and embodiments, or equivalent substitutions may be made therein by those skilled in the art without departing from the spirit and scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. A mosaic spectrum camera is characterized by comprising a light splitting device, wherein the light splitting device comprises a light inlet end, a first light outlet end and a second light outlet end, the light inlet end is provided with an imaging lens (1), the first light outlet end is connected with a first detector (6) through a first adjusting device, the lighting end of the first detector (6) is arranged opposite to the first light-emitting end, a first mosaic filter (11) is arranged on the lighting end of the first detector (6), the second light-emitting end is connected with a second detector (5) through a second adjusting device, the light-collecting end of the second detector (5) is arranged opposite to the second light-emitting end, a lighting end of the second detector (5) is provided with a second mosaic filter (10), the first detector (6) and the second detector (5) are both connected with a data processing module (12).

2. The mosaic spectrum camera according to claim 1, wherein said light splitting means is a splitting prism (9).

3. The mosaic spectral camera according to claim 1, wherein said first mosaic filter (11) is a shortwave infrared band mosaic filter.

4. The mosaic spectral camera according to claim 1, wherein said second mosaic filter (10) is a visible band mosaic filter.

5. The mosaic spectrum camera according to claim 2, wherein a support (3) is mounted on the beam splitter prism (9), a front end plate (14) fixed with the support (3) is arranged at a light inlet end of the beam splitter prism (9), the imaging lens (1) is mounted on the front end plate (14), a cover (2) is connected to the front end plate (14) through screws, the cover (2) is connected with the front end plate (14) to form a cavity, the first detector (6), the second detector (5) and the beam splitter prism (9) are all arranged inside the cavity, and the imaging lens (1) is arranged outside the cavity.

6. The mosaic spectrum camera according to claim 5, wherein said first adjusting device comprises a connecting frame (8) fixed with said first detector (6), the lighting end of said first detector (6) is located inside said connecting frame (8), said connecting frame (8) is matched with the first light-emitting end of said beam splitter prism (9), the first light-emitting end of said beam splitter prism (9) extends to the inside of said connecting frame (8), each side edge of said connecting frame (8) is screwed with a first bolt (7), and each said first bolt (7) is abutted against said beam splitter prism (9).

7. The mosaic spectral camera according to claim 5, wherein the second adjusting device comprises a connecting plate (13), a strip-shaped groove is formed in the connecting plate (13), the strip-shaped groove is distributed along a direction perpendicular to the second mosaic filter (10), a second bolt (4) is slid in the strip-shaped groove, and the second bolt (4) is in threaded connection with the bracket (3).