Digital holographic three-dimensional microscopic observation device based on multi-polarization state synthesis
A digital holography and observation device technology, which is applied to measurement devices, optical devices, instruments, etc., can solve the problems of blurred reproduced images and indistinguishable details of reproduced images, and achieves convenient operation, compact structure and high resolution. Effect
Inactive Publication Date: 2011-10-26
BEIHANG UNIV
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The details of the reconstructed image covered by speckle are difficult to distinguish, making the reconstructed image blurred
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[0020] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0021] see figure 1 , Figure 1A As shown, the present invention is a digital holographic three-dimensional microscopic observation device based on multi-polarization synthesis. B plano-convex lens 3D, A reflector 4, B reflector 7, depolarization beam splitter 5 and CMOS camera 6. The light splitting unit 2 receives the laser light emitted by the light source 1, and outputs linearly polarized light 21 and circularly polarized light 22; the linearly polarized light 21 passes through the A spatial filter 3A, the A plano-convex lens 3B, and the A reflector 4 in sequence, and then enters the depolarized light splitter On the prism 5 ; the circularly polarized light 22 passes through the B spatial filter 3C, the B plano-convex lens 3D, the B mirror 7 , and the object to be observed 14 , and then enters the depolarizing beamsplitter prism 5 ; it is finally collec...
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The invention discloses a digital holographic three-dimensional microscopic observation device based on multi-polarization state synthesis. After a light splitting unit in the device splits the received laser into linearly polarized light and circularly polarized light, the linearly polarized light and the circularly polarized light are respectively input into two spatial filters; the linearly polarized light sequentially passes through a plane convex lens and a reflector to form reference light, and the reference light enters a depolarization light splitting prism; and the circularly polarized light sequentially passes through the plane convex lens and the reflector to form illumination light, and the illumination light enters the depolarization light splitting prism after being irradiated on an object to be observed and then scattered. A polarization light splitting prism in the light splitting unit is arranged between a half-wave plate A and a half-wave plate B, and 1 / 4 wave plate is arranged in the position of the reflected light of the polarization light splitting prism. By changing the polarization direction of the linearly polarized reference light and enabling the circularly polarized scattered light containing the shape information of the object to generate interference, the device of the invention can acquire multiple holographs containing different information of the object under the condition that the angle of the irradiation light and the relative position of the object and a camera are not changed; and the observation device can acquire the three-dimensional information of the object to be observed in a non-contact in-situ detection mode.
Description
technical field [0001] The invention relates to a three-dimensional microscopic observation system, more particularly, to a digital holographic three-dimensional microscopic observation system based on multi-polarization synthesis. Background technique [0002] Digital holography technology uses CCD (Charge Coupled Device, Charge Coupled Device), CMOS (Complementary Metal-Oxide Semiconductor, Metal Oxide Semiconductor) and other photoelectric imaging detection devices as recording media and records holograms in digital form, and uses computer simulation to reproduce reference The light passes through the optical diffraction process of the hologram to reconstruct the three-dimensional scattered light field digitally, so as to obtain the information of the amplitude and phase of the scattered light field. It has the advantages of very small and simple system structure; (2) The recording and reproduction process of digital hologram is completed in digital form, so the scattered...
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IPC IPC(8): G01B11/24G01B9/023
Inventor 肖文戎路潘锋伊小素刘烁常君磊
Owner BEIHANG UNIV