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Associated imaging spectroscopic camera based on non-Rayleigh speckle field and imaging method thereof

A technology of non-Rayleigh dispersion and correlative imaging, 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: 2019-03-26
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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  • Associated imaging spectroscopic camera based on non-Rayleigh speckle field and imaging method thereof

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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: including a front imaging mirror 1, a beam splitter 2, a bandpass filter 3, a monitoring detector 4 and a computer 9, which is characterized in that it also includes a polarizer 5, a beam splitter 6, a spatial light modulator 7 and Area array detector 8, described polarizer 5, beam splitter 6 and spatial light modulator 7 are positioned at the imaging plane b of described front imaging mirror 1 in sequence, and described computer 9 is connected with described monitor respectively The detector 4, the spatial light modulator 7 and the area array detector 8 are connected;

[0028] The incident light passes through the front imaging mirror 1 and the beam splitter 2 successively and is divided into transmitted light and reflected light. Along the reflected light direction is a monitoring detector 4, and t...

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Abstract

The invention provides an associated imaging spectroscopic camera based on non-Rayleigh speckle field and an imaging method thereof. The device comprises a front imaging mirror, a beam splitter, a band pass filter, a monitoring detector, a polarizer, a beam splitter, a spatial light modulator, an area array detector and a computer. According to the method, the reversible characteristics of an optical path are used, the non-Rayleigh speckle field can be generated under the condition of no lens, and the non-Rayleigh speckle field is applied to a correlation imaging spectroscopic camera based oncompressed sensing, wherein the imaging using a super Rayleigh speckle field can improve the quality and resolution of a reconstructed image under a low signal-to-noise ratio condition.

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...

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Application Information

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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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