Fast multispectral remote sensing polarization imager

Abstract

The invention relates to a fast multispectral remote sensing polarization imager. A system can work under an active mode and a passive mode and can improve the detectability of a target by controlling the polarization state and the wavelength of incident light. The system essentially consists of an emitting part, a receiving part, a controlling part and an image processing part. The emitting partessentially consists of a multi-wavelength pulse light source, a polarization module and a beam shaping, collimating and beam expanding part. The receiving part consists of a scanning and receiving telescope, the polarization module and a multispectral camera. A control system essentially controls the polarization state of the emitting part and the receiving part and obtains images under various polarization modes. The image processing part realizes the pseudo-color coding of an intensity image and a polarization degree image. The polarization state of the incident light can be adjusted by a fast adjustable liquid crystal wave plate; imaging range is enlarged in a way of scanning and receiving; and finally the noise is eliminated by image processing, so as to realize a pseudo-color codingimage with exact real-time intensity and polarization degree.

Description

1. Technical field

[0001] The invention relates to the field of optical remote sensing polarization imaging, and proposes an experimental system for fast multi-spectral remote sensing polarization imaging, which combines the advantages of intensity, multi-spectrum and polarization. Using multi-wavelength optical parametric oscillators, liquid crystal tunable wave plates and optical filters, the intensity and degree of polarization pseudo-color-coded imaging can be realized at multiple wavelengths, which can be applied to imaging analysis of vegetation, minerals, and environmental remote sensing, target detection, identification, Classification, as well as deep space exploration and other fields, suitable for ground, airborne and airborne applications, the invention can also be applied to the field of medical imaging, such as skin tissue detection. 2. Background technology

[0002] Traditional optical remote sensing uses intensity, coherence, spectral imaging or detection met...

Examples

Embodiment Construction

[0023] figure 1 Shown is the schematic diagram of the fast multispectral remote sensing polarization imager. First, the system is initialized through the control module (17), and the pulse frequency and wavelength range of the optical yield oscillator (1) are set according to the requirements. The multispectral camera (16 ), set the applied voltage for the liquid crystal wave plate (4) and (13) (when using the liquid crystal filter (14), its voltage also needs to be set to select a suitable wavelength), and set the liquid crystal Combination rules of wave plates, and scanning range and scanning frequency of scanning device (21).

[0024] The light emitted by the optical parametric oscillator first passes through the diffuser (2) to reduce the spatial coherence of the light, then passes through the Glan laser prism (3) to generate completely linearly polarized light, and passes through the liquid crystal adjustable wave plate (4) to generate a specific state After passing thro...

1. Technical field

[0001] The invention relates to the field of optical remote sensing polarization imaging, and proposes an experimental system for fast multi-spectral remote sensing polarization imaging, which combines the advantages of intensity, multi-spectrum and polarization. Using multi-wavelength optical parametric oscillators, liquid crystal tunable wave plates and optical filters, the intensity and degree of polarization pseudo-color-coded imaging can be realized at multiple wavelengths, which can be applied to imaging analysis of vegetation, minerals, and environmental remote sensing, target detection, identification, Classification, as well as deep space exploration and other fields, suitable for ground, airborne and airborne applications, the invention can also be applied to the field of medical imaging, such as skin tissue detection. 2. Background technology

[0002] Traditional optical remote sensing uses intensity, coherence, spectral imaging or detection met...

Examples

Embodiment Construction

[0023] figure 1 Shown is the schematic diagram of the fast multispectral remote sensing polarization imager. First, the system is initialized through the control module (17), and the pulse frequency and wavelength range of the optical yield oscillator (1) are set according to the requirements. The multispectral camera (16 ), set the applied voltage for the liquid crystal wave plate (4) and (13) (when using the liquid crystal filter (14), its voltage also needs to be set to select a suitable wavelength), and set the liquid crystal Combination rules of wave plates, and scanning range and scanning frequency of scanning device (21).

[0024] The light emitted by the optical parametric oscillator first passes through the diffuser (2) to reduce the spatial coherence of the light, then passes through the Glan laser prism (3) to generate completely linearly polarized light, and passes through the liquid crystal adjustable wave plate (4) to generate a specific state After passing thro...

Images