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Incoherent digital holography three-dimensional dynamic microscopic imaging system and method

A digital holographic, three-dimensional dynamic technology, applied in the parts of TV system, image communication, TV and other directions

Active Publication Date: 2013-08-21
BEIJING UNIV OF TECH
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Problems solved by technology

There is no report on the method of using single-exposure phase shift in the incoherent digital holography system

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  • Incoherent digital holography three-dimensional dynamic microscopic imaging system and method

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Embodiment Construction

[0025] The recording process is described below through computer simulation and accompanying drawings:

[0026] The schematic diagram of the optical path of this embodiment is as follows figure 1 As shown: the shooting light path of the hologram is a white light source 1, a converging lens 2, an aperture stop 3, a filter 4, a sample to be tested 5, a collimating lens 6, a beam splitting prism 7, a spatial light modulator 8, The image sensor 9 and the computer 10 are composed. The incident light irradiates the sample to be tested, and the light waves transmitted by the sample to be tested 5 are collected by the collimator lens 6 and modulated by the spatial light modulator 8 before being received by the image sensor 9 . The computer simulates the process of light wave propagation in the schematic diagram of the optical path. The central wavelength of the light source used is 633nm, the calculation plane resolution is 1080×1080 pixels, and the sampling interval is 8μm×8μm.

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Abstract

The invention provides an incoherent digital holography three-dimensional dynamic microscopic imaging system and method and belongs to the field of an optical diffraction imaging and incoherent digital holography technology. Three-dimensional microscopic imaging of dynamic samples is achieved through adoption of a single exposure phase shift technology based on a phase spatial light modulator on the condition of incoherent light illumination. In a hologram shooting light path, incident light is incoherent light transmitted or reflected by the samples, is subjected to convergence of a collimation lens and modulation of the spatial light modulator, and is received by an image sensor. The image sensor and the spatial light modulator are respectively connected with a computer. Diffraction spectroscopic phase mask patterns which are made and generated in the computer are loaded on the spatial light modulator. In order to enable a plurality of phase holograms to be recorded by the system through one-time exposure, a phase loading method on the spatial light modulator needs to be adjusted to a regional phase shift loading method. The incoherent digital holography three-dimensional dynamic microscopic imaging system and method can be used for simultaneously recording the plurality of incoherent digital holograms through one-time exposure, and can be used for carrying out real-time three-dimensional imaging with low requirements for coherence of light sources. Moreover, any moving components or scanning components are not needed in the system.

Description

technical field [0001] The invention discloses an incoherent digital holographic three-dimensional dynamic microscopic imaging system and method based on a spatial light modulator to realize diffraction splitting and partition phase shifting, belonging to the technical fields of optical diffraction imaging and incoherent digital holography. Background technique [0002] In the case of incoherent light source illumination, the light wave from the same point light source is divided into two beams by appropriate optical techniques, and the interference pattern recorded by the two beams of light interference becomes a sub-hologram. For the actual extended object, it can be considered It is a collection of many point sources, and an object illuminated by incoherent light can be considered as a superposition of many sub-holograms, which are called incoherent holograms. G. Cochran et al. proposed triangular interference holography, T. Poon et al. proposed fluorescence scanning holo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B23/04G03H1/06H04N5/225
Inventor 万玉红陈昊满天龙江竹青王大勇
Owner BEIJING UNIV OF TECH
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