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Method for reducing diffraction angle in holographic phasic difference magnification

A phase difference and holographic technology, applied in the field of holographic phase difference amplification, can solve problems such as restricting the development of large-scale optical engineering

Inactive Publication Date: 2008-07-02
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

[0002] In recent years, with the rapid development of synchrotron radiation sources and high-power large-aperture lasers, there is an urgent need for ultra-precision inspection of large-aperture optical components used in these large-scale optical projects. The commonly used optical interferometers, knife-edge instruments, etc. The detection accuracy is only (1 / 30 ~ 1 / 60) wavelength, and the experimental requirement is below 1 / 100 wavelength, that is, it reaches the nanometer level. Therefore, this high-precision wavefront test restricts my country's large-scale Development of Optical Engineering

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  • Method for reducing diffraction angle in holographic phasic difference magnification
  • Method for reducing diffraction angle in holographic phasic difference magnification

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Embodiment Construction

[0021] see figure 1 , using the present invention to adopt figure 1 When the device performs phase difference magnification of the hologram, the diameters of the lens 4 and the lens 6 do not need to be enlarged, and the quality of the lenses does not need to be increased. The method for reducing the diffraction angle in the holographic phase difference amplification of the present invention is carried out in the following steps:

[0022] 1) When the magnification of the phase difference magnified hologram reaches 10 times, the diffraction angle also increases because the spacing of the diffraction fringes increases by 10 times compared with that before the magnification. Place this hologram on the workbench and illuminate it with a parallel He-Ne laser after reaming;

[0023] 2) using an imaging lens with a magnification of 2 times to optically magnify the phase difference magnified hologram;

[0024] 3) Use a holographic dry plate to record the hologram with enlarged fring...

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Abstract

It is a method to lessen diffraction angle in holography phase difference amplifying, which comprises the following steps: to put the holography amplified on workbench and shoot it with parallel He-Ne laser amplified; to optically amplify the holography by one image forming lens; to record the holography with fringe distance amplified with a holography plate and then to do dark developing, image fixation and dry and to put the holography to the co-axis phase difference amplifying device and to substitute original holography and to amplify the phase difference; to repeat the above steps to get holography with higher time.

Description

technical field [0001] The invention relates to holographic phase difference amplification, in particular to a method for reducing diffraction angle in holographic phase difference amplification. Background technique [0002] In recent years, with the rapid development of synchrotron radiation sources and high-power large-aperture lasers, there is an urgent need for ultra-precision inspection of large-aperture optical components used in these large-scale optical projects. The commonly used optical interferometers, knife-edge instruments, etc. The detection accuracy is only (1 / 30 ~ 1 / 60) wavelength, and the experimental requirement is below 1 / 100 wavelength, that is, it reaches the nanometer level. Therefore, this high-precision wavefront test restricts my country's large-scale The development of optical engineering. [0003] Coaxial recording phase difference amplification holographic device provided by inventors Chen Jianwen, Gao Hongyi, Xie Honglan, Xu Zhizhan, Shanghai Ins...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/22G01B11/00G03H1/00
Inventor 陈建文高鸿奕李儒新徐至展
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI