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Compact type collimating common optical path phase shifting digital holography imaging system and method

A technology of digital holography and imaging system, applied in instruments and other directions, can solve the problems of poor reliability, low practicability, complex optical path, etc., and achieve the effect of improving stability

Active Publication Date: 2018-02-27
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this kind of structured optical path is relatively complicated, and requires high alignment accuracy, low practicability, and poor reliability, which needs to be solved

Method used

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  • Compact type collimating common optical path phase shifting digital holography imaging system and method
  • Compact type collimating common optical path phase shifting digital holography imaging system and method
  • Compact type collimating common optical path phase shifting digital holography imaging system and method

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Embodiment Construction

[0027] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0028] The compact quasi-common optical path phase-shift digital holographic imaging system and method according to the embodiments of the present invention will be described below with reference to the accompanying drawings. First, the compact quasi-common optical path phase-shift digital holographic imaging system according to the embodiments of the present invention will be described with reference to the accompanying drawings .

[0029] figure 1 It is a structural schematic diagram of a compact quasi-common optical path phas...

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Abstract

The invention discloses a compact type collimating common optical path phase shifting digital holography imaging system and method. The system comprises a laser, a plane mirror, a microobjective, a pinhole, a collimating lens, a line polarizing film, an unpolarized splitting prism and a coating film reflector, and the coating film reflector is connected with piezoelectric ceramics; a picture sensor collectors a hologram, wherein the hologram is obtained by interference of object waves irradiated to objects and reference optical waves reflected by the coating film reflector, a two-dimensional rotation regulating frame with the unpolarized splitting prism is adjusted for adjusting the object light wave angle, the piezoelectric ceramic is controlled to achieve reference optical wave phase shifting, the hologram is analyzed and rebuilt through a phase shifting algorithm and a diffraction propagation method , and an imaging result is obtained. The system can adjust the two-dimensional rotation regulating frame by compactly arranging the coating film reflector driven by the piezoelectric ceramic and the unpolarized splitting prism, and the piezoelectric ceramic is controlled to obtain the holography, so that the imaging stability, practicability and reliability are effectively improved, and the system is simple and easy to obtain.

Description

technical field [0001] The invention relates to the technical field of digital holographic imaging, in particular to a compact quasi-common optical path phase shift digital holographic imaging system and method. Background technique [0002] Digital holography has the advantages of dynamic fast, non-invasive and non-destructive imaging, and can realize phase imaging and three-dimensional imaging. Among them, the phase-shift digital holographic imaging method, because of its simple structure, makes full use of the spatial bandwidth product of the imaging system, and can eliminate the background in holography Noise and conjugate images have been widely used in imaging fields such as biomedical imaging and particle field measurement. However, traditional phase-shift digital holography is based on a non-common path structure, and multiple phase-shift holograms need to be taken at the same time. Holography is closer to practical application, and it is a scientific and technologi...

Claims

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Application Information

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IPC IPC(8): G03H1/04G03H1/08G03H1/10G03H1/22
CPCG03H1/0443G03H1/0866G03H1/10G03H1/22
Inventor 张文辉曹良才张浩金国藩
Owner TSINGHUA UNIV
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