Apparatus for generating controllable super-Rayleigh speckle field and method for generating the same

A technology for making devices and speckles, which is applied in the direction of spectrum generation, etc., can solve problems such as large analysis errors, large number of sampling points, and surge in calculation amount, and achieve the effect of free adjustment of contrast value

Inactive Publication Date: 2015-11-11
HENAN UNIV OF SCI & TECH
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Problems solved by technology

Since speckle research belongs to the field of compound statistical optics, for the same detection plane, if the speckle size is too large, the number of speckles in the detection plane will be too small, so that the number of sampling points in the sample is too small and the a

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  • Apparatus for generating controllable super-Rayleigh speckle field and method for generating the same
  • Apparatus for generating controllable super-Rayleigh speckle field and method for generating the same
  • Apparatus for generating controllable super-Rayleigh speckle field and method for generating the same

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Embodiment Construction

[0026] The manufacturing device and manufacturing method of the adjustable super-Rayleigh speckle field of the present invention will be further described below in conjunction with specific embodiments, so that those skilled in the art can better understand and implement the present invention. The examples are not meant to limit the present invention.

[0027] A manufacturing device that can control the super-Rayleigh speckle field, such as figure 1 As shown, it includes a continuous wave laser 100, a computer I1001, and a computer II1002. A tunable laser attenuator 200, a pinhole filter 300, a lens 401, and a polarizer I501 are sequentially arranged in the forward direction of the continuous wave laser 100. And the beam splitter 600, the beam splitter 600 has two other different beam forward directions, one of which is provided with a reflective spatial light modulator 701 in the beam forward direction, and the other beam is provided with an analyzer I502, light Stop I801, pola...

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Abstract

The invention discloses an apparatus for generating a controllable super-Rayleigh speckle field and a method for generating the same. The generating apparatus includes a continuous wave laser, a computer I and a computer II. Along the progressing direction of a light beam of the continuous wave laser there is successively provided with an adjustable laser attenuator, a pinhole filter, a lens, a polarizer I and a beam splitter. From the beam splitter, the light beams is divided into two light beams which progress along two different directions, and along the progressing direction of one light beam there is provided with a reflecting spatial light modulator, and along the progressing direction of the other light beam there is provided with an analyzer I, a diaphragm I, a polarizer II, a transmission type spatial light modulator, an analyzer II, a diaphragm II, a Fourier lens and a CCD camera, wherein the reflex spatial light modulator is connected to the CCD camera and the computer I, and the transmission-type spatial light modulator and the computer II are connected. According to the invention, the values of an exponential factor S and an angular index m are changed to obtain a target super-Rayleigh speckle field, so that the super-Rayleigh speckle field which has a controllable speckle size and contrast ratio is obtained.

Description

Technical field [0001] The invention relates to the technical field of optical testing and microscopy applications, and in particular to a manufacturing device capable of regulating and controlling the super-Rayleigh speckle field and a manufacturing method thereof. Background technique [0002] When coherent light is irradiated on the scattering medium, a granular speckle pattern of light and dark will be generated in the transmitted or reflected field; the speckle is formed by the spatial coherence of the scattered wavelets of the scattering particles. If the surface fluctuation of the scattering medium is greater than the wavelength of the incident light, the intensity distribution of the speckle light field conforms to the Rayleigh statistics, and the light intensity of the speckle field follows the negative e-index distribution; for the Rayleigh speckle field, its speckle pattern The contrast value is 1. [0003] Many basic research and application fields require that the sta...

Claims

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Application Information

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IPC IPC(8): G01J3/12
Inventor 李新忠台玉萍李贺贺王静鸽甄志强田晓敏周洋
Owner HENAN UNIV OF SCI & TECH
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