Complex amplitude object reconstruction device based on optical scanning holographic technique

Abstract

The invention relates to a complex amplitude object reconstruction device based on the optical scanning holographic technique. The complex amplitude object reconstruction device comprises a difference frequency laser coherent unit, a two-dimensional scanning unit, a photoelectric information receiving and processing unit and a computer reconstruction complex amplitude unit; the reconstruction of the complex amplitude object is realized based on the difference frequency scanning technology which is simpler and easy to realize when being compared with the conventional coherent optical scanning holographic technique. The complex amplitude object reconstruction device can be applied to the field of biology microscope, particularly to the field of transparent or weak-absorption biological sample detection, has the advantage of being superior to other biological imaging techniques, can realize coherent-imaging on the premise of ensuring the imaging resolution, can further obtain more information of the sample related to the refractive index, thereby being quite good in the application prospect in biomedicine.

Description

technical field [0001] The invention relates to three-dimensional imaging of coherent objects in the field of biomedicine, in particular to a complex-amplitude object reconstruction device based on optical scanning holography technology. technical background [0002] Optical Scanning Holography (OSH) is a new type of digital holography technology, which was jointly proposed and gradually improved by Professor Ting-Chung Poon of Virginia Tech University and his collaborators, and has received extensive attention in the field of international information optics. At present, the application research on OSH has been carried out in many scientific research fields, and a lot of achievements have been obtained in both theory and experiment. Prior technology (T.-C.PoonandA.Korpel, "Optical transfer function of anacousto-opticheterodyning image processor," Opt. Lett.4, 317-319 (1979)) first proposed the concept of difference frequency coherence for incoherent image processing, which ...

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Problems solved by technology

However, this structure is relatively complicated, requiring an additional Fourier lens, and inserting a pinhole screen after the lens, and the pinhole screen must be placed at the back focal plane to satisfy the Fourier transform relationship, which requires relatively high requirements on the optical path. High, not conducive to the research and application of this technology

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