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A reference beam splitting method and special device for space angle division multiplexing holography based on Wollaston prism

A Wollaston prism and special device technology, applied in optics, optical components, instruments, etc., can solve problems such as complex adjustment mechanism, insufficient utilization of space bandwidth of recording devices, unreasonable spatial distribution of reference light, etc., and achieve stability Improve and adjust the effect of step simplification

Inactive Publication Date: 2017-12-15
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of unreasonable spatial distribution of reference light, insufficient utilization of the spatial bandwidth of the recording device, complex adjustment mechanism and the like in the existing method, and to provide a spatial angle division multiplexing holographic object based on the Wollaston prism. Optical beam splitting method, at the same time provides a special device for the beam splitting method, through which the incident circularly polarized pulsed light can be generated into multiple directions of transmitted pulsed light, which can be effectively applied to spatial angle division multiplexing holography During the operation, the direction of the reference light can be changed simply by rotating the Wollaston prism without affecting the convergence direction of the reference beam, so that the spectrum of the multiplexed hologram can be evenly distributed around the zero-order image

Method used

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  • A reference beam splitting method and special device for space angle division multiplexing holography based on Wollaston prism
  • A reference beam splitting method and special device for space angle division multiplexing holography based on Wollaston prism
  • A reference beam splitting method and special device for space angle division multiplexing holography based on Wollaston prism

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Embodiment 1

[0035] See attached figure 1 , the present invention is based on the special device of the reference beam splitting method of the space angle division multiplexing holography of the Wollaston prism comprising:

[0036] Two sets of delay lines; two depolarized light-splitting flat films; two sets of double-lens converging systems; two Wollaston prisms, the surfaces of the Wollaston prisms are all coated with anti-reflection coatings; wherein,

[0037] The first depolarized beam splitter 1 (BS 1 ), which is used to split the ultrashort laser double pulse of the circular polarization state into pulses emitted in two directions;

[0038]The first delay line structure 2 (DL 1 ), located in the first depolarized beam splitter plate 1 (BS 1 ) on the reflected light path, used to adjust the optical path of the reflected light path, so as to adjust the pulse interval of two pairs of double pulses;

[0039] Located in the first delay line structure 2 (DL 1 The rotatable Wollaston p...

Embodiment 2

[0045] combined with figure 1 , the present invention is based on the reference beam splitting method of the spatial angle division multiplexing holography of the Wollaston prism:

[0046] 1. The pulsed laser is incident on the first depolarized beam splitter 1 (BS 1 ) for beam splitting;

[0047] 2. In the first depolarized beam splitter 1 (BS 1 ) The reflected light beam is incident on the first delay line structure 2 (DL 1 ) and the second delay line structure 3 (DL 2 );

[0048] 3. The beam passing through the two delay lines passes through the second depolarized beam splitter 4 (BS 2 ) on the bundle;

[0049] 4. In the second depolarized beam splitter 4 (BS 2 ) with two mirrors and depolarization beam combiner 11 (BS 3 ) to form a Mach-Zendr interference system, in which the depolarization beam combiner 11 (BS 3 ) position and angle, so that the two beams of light are combined on the CCD target surface at an angle of θ, where θ is the beam splitting angle of the ...

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Abstract

The invention discloses a reference light beam splitting method based on Wollaston prism space angle division multiplexing holography, and a special-purpose device thereof, belonging to the space angle division multiplexing digital pulse holography field. The beam splitting device is composed of two delay structures, two Wollaston prisms, two light splitting plain films and two double lens convergence systems. The device allows incident pulsed light of a circular polarization state or two vertical linear polarization states to generate transmission pulsed light in a plurality of directions, thereby effectively applying the pulsed light to the space angle division multiplexing holography, changing the direction of reference light simply through a Wollaston prism, and not influencing the convergence direction of reference light beams. Through adjusting the Wollaston prisms, the frequency spectrum of multiplexing holography can be uniformly distributed on the periphery of a zero order image; in addition, the device has the advantages of high energy utilization rate, simple adjustment, etc.

Description

technical field [0001] The invention belongs to the field of space angle division multiplexing pulse digital holography, and mainly solves the problem of generation of reference light space multi-angle transmission light beams in space angle division multiplexing pulse digital holography. Background technique [0002] Holography was first proposed by British scientist Dennis Gabor in 1947, and the first hologram was recorded and reproduced in 1948. Holography has the advantages of large information capacity and three-dimensional image reproduction. [0003] The initial holography is completed in the coaxial case, the object light and the reference light are coherently superimposed and recorded on the photosensitive device in a coaxial manner, and when the hologram is reproduced, the formed zero-order image and conjugate image spot overlap with the reproduced image Together, it seriously affects the quality of the reproduced image. In 1962, American scientists E.N.Leith and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/28G03H1/12
CPCG02B27/285G03H1/12
Inventor 杨勇赵东亮谢东卓翟宏琛
Owner NANKAI UNIV