A Vortex Digital Holographic Microscopy System Based on Dual Liquid Crystal Spatial Light Modulators

A technology of spatial light modulator and digital holographic microscopy, which is applied in the direction of instruments, optical devices, measuring devices, etc., can solve the problem of spectral aliasing, the inability to correctly separate direct light and primary light, that is, the sample image spectrum, and imaging detector space Bandwidth can not be fully utilized and other issues, to achieve the best interference effect, to overcome the effect of insufficient bandwidth utilization of CMOS

Inactive Publication Date: 2021-02-02
FUJIAN NORMAL UNIV
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Problems solved by technology

The disadvantage is that the spatial bandwidth of the imaging detector cannot be fully utilized due to the fact that the Fourier spectrum contains the spectrum of the direct light and the conjugate image.
And for samples with a wide spatial spectrum distribution, it will cause spectrum aliasing, and cannot correctly separate the spectrum of direct light and primary light, that is, the sample image

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  • A Vortex Digital Holographic Microscopy System Based on Dual Liquid Crystal Spatial Light Modulators
  • A Vortex Digital Holographic Microscopy System Based on Dual Liquid Crystal Spatial Light Modulators
  • A Vortex Digital Holographic Microscopy System Based on Dual Liquid Crystal Spatial Light Modulators

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[0028] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0029] It should be pointed out that the following detailed description is exemplary and is intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

[0030] It should be noted that the terminology used here is only used to describe specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combi...

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Abstract

The invention relates to a vortex digital holographic microscope system based on a dual liquid crystal spatial light modulator. According to the vortex digital holographic microscope system, an optical path adopts a dual-arm structure of a Michelson interferometer; collimated laser is incident into a first beam splitting prism, and a rear optical path is divided into two paths of a reference arm and an interference arm; an interference arm is sequentially provided with a stage having an electronically controlled displacement stage, an objective lens having an electronically controlled turntable, a first 4f lens, a second beam splitting prism, an electronically controlled field-of-view aperture, a second 4f lens, a pure phase liquid crystal spatial light modulator, a Fourier transform mirror, a third beam splitting prism and a CMOS camera; a reference arm is sequentially provided with an intensity liquid crystal spatial light modulator, a light blocking plate and two mirrors ; and Kohler illumination is adopted for illumination above a sample. The vortex digital holographic microscope system can achieve the purpose of acquiring complex wavefront of the observed sample by imaging atone time.

Description

technical field [0001] The invention relates to the technical field of detection instruments, in particular to a vortex digital holographic microscope system based on a double liquid crystal spatial light modulator. Background technique [0002] Digital holographic microscopy is a detection technology developed in the past two decades. In recent years, micro-digital holography has become a new research hotspot in the world. It has the advantages of high sensitivity, high accuracy, high-resolution imaging, and the convenience and flexibility of hologram storage, reproduction and transmission. It is particularly suitable for microstructural measurements. In 1999, E. Cuche et al. in Switzerland first proposed digital holographic microscopy, which completed the reconstruction of intensity image and phase image through a single hologram, and its lateral resolution reached the micron level, and its longitudinal resolution reached nanoscale. [0003] The main applications of di...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B9/027
CPCG01B9/027
Inventor 郑明杰李志芳
Owner FUJIAN NORMAL UNIV
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