Correlative Imaging Spectral Camera and Its Imaging Method Based on Non-Rayleigh Speckle Field

A correlative imaging and non-Rayleigh dispersion technology, applied in spectrometry/spectrophotometry/monochromator, spectrum investigation, optical radiation measurement, etc., can solve the problem of not being able to obtain high-quality reconstructed images, and achieve system Simple structure and wide application range

Active Publication Date: 2021-03-02
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

However, this system uses Rayleigh speckle field, so it cannot obtain high-quality reconstructed images at low signal-to-noise ratio

Method used

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  • Correlative Imaging Spectral Camera and Its Imaging Method Based on Non-Rayleigh Speckle Field

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Embodiment Construction

[0027] Combine below figure 1 The correlative imaging spectral camera based on the non-Rayleigh speckle field of the present invention is further described, as figure 1 As shown: it includes a front imaging mirror 1, a first beam splitter 2, a bandpass filter 3, a monitor detector 4 and a computer 9, and is characterized in that it also includes a polarizer 5, a second beam splitter 6, a spatial light The modulator 7 and the area array detector 8, the polarizer 5, the second beam splitter 6 and the spatial light modulator 7 are sequentially located behind the imaging plane b of the front imaging mirror 1, and the computer 9 respectively connected to the monitoring detector 4, the spatial light modulator 7 and the area array detector 8;

[0028] The incident light passes through the pre-imaging mirror 1 and the first beam splitter 2 in turn and is divided into transmitted light and reflected light. Along the reflected light direction is a monitoring detector 4, and the transmi...

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Abstract

A correlative imaging spectral camera based on non-Rayleigh speckle field and its imaging method, the device includes a front imaging mirror, a beam splitter, a bandpass filter, a monitoring detector, a polarizer, a beam splitter, a spatial light modulation detectors, area detectors and computers. The invention utilizes the reversible characteristics of the optical path to generate non-Rayleigh speckle fields without lenses, and applies it to a correlated imaging spectral camera based on compressed sensing, wherein imaging using hyper-Rayleigh speckle fields can be performed in Improve the quality and resolution of reconstructed images under low signal-to-noise ratio conditions.

Description

technical field [0001] The invention relates to a method and device for generating a non-Rayleigh speckle field, in particular to a correlative imaging spectrum camera based on a non-Rayleigh speckle field and an imaging method thereof. Background technique [0002] When coherent light is used to irradiate the scattering medium, a speckle pattern with alternating light and dark can be observed in the transmission or reflection direction, and the speckle is formed by the spatial coherence of the scattering wavelets of the scattering particles. The essence of speckle formation is a wave phenomenon. It has been observed that various waves of different properties can produce speckle, including ultrasonic waves, microwaves, light waves, x-rays, and matter waves. If the surface fluctuation of the scattering medium is larger than the wavelength of the incident light, the speckle field shows a general statistical property called Rayleigh statistics. At this time, the amplitude of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J3/28
CPCG01J3/2823
Inventor 韩申生刘盛盈刘震涛吴建荣李恩荣沈夏
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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