Holographic interferometer based on Fibonacci Billet split lens

Abstract

The invention discloses a holographic interferometer based on a Fibonacci Billet split lens. The holographic interferometer comprises a single-focus diffraction lens, the Fibonacci Billet split lens,a filter plate, a collimating lens, a recording camera and a computer. Through the combination of the diffraction lens and the filter plate, the frequency spectrum of an object is obtained in the sameplane; meanwhile, a reference point coherent light source with a proper carrier frequency can be flexibly selected; a secondary phase factor of the reference point coherent light source is eliminatedby a lens, and then a modulation signal of an incident wavefront is obtained in an interference area where light beams are overlapped; and finally, original complex amplitude distribution of carriersis restored through a Fourier carrier frequency reconstruction algorithm. The holographic interferometer overcomes the defect that the traditional holography is easily disturbed by the environment, has the advantages of simple operation, stable structure and quick measurement, can freely select the carrier frequency for modulating the signals, and can be flexibly applied to the fields of wavefront measurement, dynamic imaging or real-time monitoring and the like.

Description

technical field [0001] The invention belongs to holographic interference wavefront measurement, in particular to a holographic interferometer based on a Fibonacci ratio tangent lens. Background technique [0002] Since Gabor proposed the concept of holography in 1948, holography has become an important research topic in the field of physics internationally because of its wide application prospects in various fields. In interferometry, holography can realize interferometry by comparing two wavefronts generated before and after an object passes through a certain physical process. The application of holography in various fields is increasing day by day, and the research on holographic imaging devices and imaging methods is also becoming more and more important. [0003] In traditional optical holography, holographic dry plates or films can record rich three-dimensional information, but the holographic recording process requires physical and chemical means such as developing, f...

AI Technical Summary

Problems solved by technology

The optical characteristics of this type of element are that a complex special design can be realized on the special order of diffraction to construct the desired light field distribution, but there are also disadvantages such as multi-order, large crosstalk, and low diffraction efficiency.

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