Quantitative correlation amplitude holographic method based on photon sieve

Abstract

The invention discloses a quantitative correlation amplitude holographic method based on a photon sieve and belongs to the field of micro-nano holography. The implementation method comprises the following steps: obtaining two binary amplitude holograms according to a holographic reproduction image, and representing phase information in an amplitude form to improve a traditional phase retrieval GSalgorithm to generate two independent binary amplitude holograms; establishing a quantitative association relationship between the two independent binary amplitude holograms by introducing a concept of 'holographic mask' to realize the quantitative association of the binary amplitude holograms, performing evaluation and cyclic optimization by measuring a peak signal to noise ratio (SNR) to obtaina group of quantitative associated amplitude holograms corresponding to the holographic reproduction image, and generating a processing file. Two mutually associated transmission type photon sieves are prepared by using a pixel with a transparent unit coding value of 1 and a pixel with a lightproof unit coding value of 0. Visible light or near-infrared incident light irradiates on two mutually associated transmission type photon sieves, and the holographic reproduction is carried out on a Fourier surface to obtain two completely different reproduction images.

Description

technical field [0001] The invention relates to a quantitative correlation amplitude holography method, which belongs to the field of micro-nano holography. Background technique [0002] Holography can reconstruct all the amplitude and phase information of the target object, and can be applied to three-dimensional display, optical manipulation, data storage, etc. Among all holographic techniques, computational holography (CGH) has attracted the attention of many scholars because it can simplify the process of optical calculation through programming, opening up new possibilities for generating holograms of virtual objects or images. There are many holographic algorithms, including point source method, surface source method, Fresnel diffraction method and angular spectrum method. These algorithms enable 2D and 3D holographic reconstruction at any distance between the hologram and the image plane. In addition, there are adaptive methods for holographic correlation techniques ...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the following problems in the existing amplitude holographic dynamic adjustable multiplexing method: it is very difficult to erase / write the amplitude information in a single pixel with existing materials

The invention can be applied to the fields of signal processing, optical storage, high-dimensional holographic anti-counterfeiting, optical encryption and dual-mode recognition, and solves related engineering technical problems

Images