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Phase-shift holographic device based on phase-type vortex lens and imaging method

A phase type, vortex technology, applied in the field of holographic imaging, can solve the problems of high price, high cost, low output power, etc., and achieve the effect of suppressing conjugate images and improving quality

Active Publication Date: 2018-12-07
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current coherent terahertz sources are often costly, expensive, and have low output power. For coherent terahertz sources, the existing amplitude-type lenses often have low diffraction efficiency, and the use efficiency is only a few percent

Method used

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  • Phase-shift holographic device based on phase-type vortex lens and imaging method
  • Phase-shift holographic device based on phase-type vortex lens and imaging method
  • Phase-shift holographic device based on phase-type vortex lens and imaging method

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Experimental program
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Embodiment

[0042] Embodiment: the measured object is a resolution board

[0043] The light source 1 is a helium-neon laser with a center wavelength of 632.8nm, the beam splitter 2 is a beam splitter with T:R=1:1, and the phase vortex focusing lens 4 is a circular phase vortex with a focal length of 150mm. Rotating focusing lens, collimating lens 5 are the biconvex lens whose focal length is 150mm, the distance z between measured object 13 and imaging detector 9 0 Take 156mm as an example, the imaging detector 9 is a CCD camera with a resolution of 1392*1040, and the measured object 13 is a resolution plate. Specifically, a phase-shift holographic device based on a phase-type vortex lens is realized: as figure 1 As shown, it consists of a helium-neon laser 1, a beam splitter 2, a rotating mirror frame 3, a phase type vortex focusing lens 4, a collimating lens 5, a first mirror 6, a beam combiner 7, a first three-dimensional translation stage 8, CCD camera 9, computer 10, second mirror 11...

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Abstract

A phase-shift holographic device based on a phase-type vortex lens and an imaging method are disclosed. The device comprises a light source, a beam splitter, a rotating lens frame, a phase-type vortexfocusing lens, a collimating lens, a first reflecting mirror, a beam combiner, a first three-dimensional translation stage, an imaging detector, a computer, a second reflecting mirror, a second three-dimensional translation stage and a measured object. The phase-type vortex focusing lens used in the invention can be used for a coherent wave band from visible light to a Terahertz wave band. In theinvention, the space-bandwidth product of the imaging detector can be fully used, the accurate reproduction of the measured object can be rapidly realized, the conjugate image of a reproduction result can be effectively restrained, and the reproductive image quality of the measured object can be obviously increased.

Description

technical field [0001] The invention belongs to holographic imaging, in particular to a phase-shift holographic device and an imaging method based on a phase-type vortex lens. Background technique [0002] Since D.Gabor proposed the concept of holography in 1948, holography has become an important research topic in the field of physics internationally due to its wide application prospects in various fields. In microscopic imaging, the three-dimensional volume imaging of holography can realize ultra-focus microscopy; in optical storage, the use of Fourier transform holograms can realize large-capacity and high-density information storage of text, images and other information; in interference In measurement, holography can realize interferometry by comparing the two wavefronts generated before and after the deformation of the object. The application of holography in various fields is increasing day by day, and the research on holographic imaging devices and imaging methods is...

Claims

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Application Information

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IPC IPC(8): G03H1/04
CPCG03H1/0443
Inventor 张秀平朱健强张军勇刘德安
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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