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Optical scanning holographic self-focusing method based on classification learning and dichotomy

An optical scanning and dichotomy technology, applied in the field of optical scanning holography, can solve the problem of low generalization ability, and achieve the effect of easy operation, excellent effect and strong usability

Active Publication Date: 2018-12-07
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] However, the above methods all have the problem of low generalization ability, and can only achieve self-focusing of holograms at certain positions.

Method used

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  • Optical scanning holographic self-focusing method based on classification learning and dichotomy
  • Optical scanning holographic self-focusing method based on classification learning and dichotomy
  • Optical scanning holographic self-focusing method based on classification learning and dichotomy

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Embodiment

[0053] The basic structure adopted by the embodiment of the present invention is as figure 1 Shown, where the wavelength of light waves λ = 632.8nm, convex lens (L 1 and L 2 ) with a focal length of 75mm, the X-Y scanning galvanometer to the single-layer slice z 0 =40mm, the sample of the object to be scanned is figure 2 As shown, the slice size used is 1mm×1mm, and the sampling pixels are 256×256.

[0054] The concrete steps of this embodiment are as follows:

[0055] Step 1. First, the laser emits a beam of frequency ω 0 The laser light is divided into two beams by the first beam splitter BS1; then, one of the beams passes through the first mirror M1 and the first pupil p 1 (x, y) and the first convex lens L1; at the same time, the frequency of another beam of light waves is raised to ω through the acousto-optic modulator AOFS 0 +Ω, and pass through the second mirror M2 and the second pupil p 2 (x, y) and the second convex lens L2; ​​wherein the first pupil is a Dili...

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Abstract

The invention presents an optical scanning holographic self-focusing method based on classification learning and dichotomy, which belongs to the field of optical scanning holography and deep learningand mainly solves the problem of optical scanning holographic self-focusing. According to the invention, the phase diagram of a reconstructed hologram is classified by deep learning, and then, the focusing position of the hologram is continuously approximated by dichotomy. Self-focusing in optical scanning holography is realized effectively and intelligently. The self-focusing method can be applied to various fields.

Description

technical field [0001] The present invention relates to the field of optical scanning holography and the field of deep learning, in particular to an optical scanning holographic self-focusing method based on classification learning and dichotomy. Background technique [0002] Optical scanning holography, referred to as OSH, uses point-by-point scanning to store three-dimensional objects in the form of two-dimensional digital images. Compared with general digital holography, its biggest advantage is that there is no interference from twin images. Since the technology was proposed, it has been applied in many fields, such as: scanning holographic microscope, 3D image recognition and 3D optical remote sensing and other fields. [0003] In the field of holography, image reconstruction has always been a research hotspot in this field, and for hologram reconstruction, finding the focus position of hologram is a key step in the reconstruction process. In recent years, deep learnin...

Claims

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Application Information

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IPC IPC(8): G03H1/04
CPCG03H1/0443
Inventor 欧海燕吴勇邵维王秉中
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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