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Compact wide-spectrum polarization spectral imaging system

A polarization spectrum and imaging system technology, applied in polarization spectrum, spectrometry/spectrophotometry/monochromator, spectrum investigation, etc., can solve problems such as complex structure, large volume, narrow spectrum band, etc., and achieve small size , high detection resolution and compact size

Pending Publication Date: 2021-10-29
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a compact wide-spectrum polarization spectrum imaging system. Aiming at the shortcomings of the traditional polarization spectrum imaging system, such as complex structure, large volume, and narrow spectrum, the present invention can simultaneously acquire visible light, near-infrared, and mid-wave infrared three-dimensional imaging system. The polarization spectrum image of each spectrum segment improves the detection resolution of the system, and the result of the system is compact, providing a platform basis for better early warning, reconnaissance, detection and identification research on airborne and spaceborne

Method used

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  • Compact wide-spectrum polarization spectral imaging system

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Embodiment 1

[0027] like figure 1 As shown, the present embodiment is a compact wide-band polarization spectrum imaging system, and the imaging system includes a front telescopic system A, a spectroscopic system B, 3 slits, and several polarization spectrum imaging subsystems, wherein the The target beam passes through the pre-telescope system A and then reaches the spectroscopic system B. After passing through the spectroscopic system B, the beam is divided into three parts, which respectively reach the three slits and then enter the respective polarization spectrum imaging subsystems;

[0028] The target beam passes through the pre-telescope system A and then reaches the spectroscopic system B. After passing through the spectroscopic system B, the beam is divided into three parts, and after arriving at three slits, it enters the respective polarization spectrum imaging systems of C, D, and E, including Slit, catadioptric lens, reflective grating, polarizer group, area array detector; aft...

Embodiment 2

[0039]Based on the above-mentioned compact wide-band polarization spectrum imaging system, the polarization spectrum images of visible light, near-infrared and mid-wave infrared can be simultaneously acquired, such as image 3 As shown, the specific process is as follows:

[0040] 1. The target beam passes through the pre-telescope system A and reaches the spectroscopic system B. After passing through the spectroscopic system B, the beam is divided into three parts, and then enters the respective polarization spectrum imaging systems of C, D, and E after arriving at three slits. These include slits, catadioptric lenses, reflective gratings, polarizer sets, and area array detectors. After the beam reaches the slit, it passes through the slit to reach the catadioptric lens, the beam is refracted and reflected, then refracted to the immersion grating, and then reaches the catadioptric lens after reflection, and then refracted to the phase modulator. The beam passes through the po...

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Abstract

The invention discloses a compact wide-spectrum polarization spectral imaging system which is composed of a front telescopic system, a beam splitting system and a polarization spectral imaging system. A scenery target is divided into three light paths by the front telescope system through the light splitting system, and the three light paths are respectively converged and imaged on the slit and then are imaged on an area array detector according to different wavelengths through a catadioptric lens, the reflective grating anda polaroid group. According to the invention, the problem of huge light path in the case of wide spectrum and high spectral resolution is solved; only one catadioptric lens is included, the structure is simple and compact, the size is relatively reduced, and installation is convenient; the detection resolution of the system is improved through the detection of the three channels. The compact wide-spectrum polarization spectral imaging system is suitable for the fields of aerospace, aviation, industry and the like, and instrument development difficulty is lowered.

Description

technical field [0001] The invention relates to the fields of miniaturized spectral imaging and polarization remote sensing, in particular to a compact wide-spectrum polarization spectral imaging system. Background technique [0002] Target detection and recognition technology plays an important role in the field of remote sensing detection, and with the improvement of background clutter and target camouflage technology, how to better improve the recognition rate is the key to research. The photoelectric imaging detection technology is also constantly progressing and developing. From the traditional method of detecting the target based on the difference in the intensity value of the reflected or radiated light wave between the target and the background, it has developed into a new technology, that is, polarization spectral imaging technology. It is a new type of optical detection technology that can integrate spectral technology, polarization technology and imaging technolog...

Claims

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Application Information

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IPC IPC(8): G01J3/28G01J3/447G01J3/02G01J3/04
CPCG01J3/2823G01J3/447G01J3/0208G01J3/04G01J2003/045
Inventor 陈阳闫钧华朱德燕张寅胡子佳时萌玮刘子健丁鹏远张少帅顾恩臣
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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