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A self-focusing method for optical scanning holography based on classification learning and dichotomy

A technology of optical scanning and dichotomy, applied in the field of optical scanning holography, can solve the problem of low generalization ability, achieve easy operation, excellent effect, and solve the effect of self-focusing

Active Publication Date: 2019-06-21
UNIV OF ELECTRONICS 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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  • A self-focusing method for optical scanning holography based on classification learning and dichotomy
  • A self-focusing method for optical scanning holography based on classification learning and dichotomy
  • A self-focusing method for optical scanning holography 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 follows: figure 1 shown, where the wavelength of the light wave is λ=632.8nm, the convex lens (L 1 and L 2 ), the focal lengths are all 75mm, and the single-layer slice z obtained by the X-Y scanning galvanometer 0 = 40mm, the scanned object sample such as figure 2 As shown, the adopted slice size 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 of light through the first beam splitter BS1; then, one of the beams of light passes through the first mirror M1 and the first pupil p 1 (x, y) and the first convex lens L1; at the same time, another light wave is boosted to ω through the acousto-optic modulator AOFS frequency 0 +Ω, and passes through the second mirror M2 and the second pupil p 2 (x, y) and the second convex lens...

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Abstract

The invention proposes an optical scanning holographic self-focusing method based on classification learning and dichotomy, which belongs to the field of optical scanning holography and deep learning, and mainly solves the problem of optical scanning holographic self-focusing. The invention uses deep learning to classify the phase images of the reconstructed holograms, and then uses the dichotomy method to continuously approach the focus position of the holograms. The invention effectively and intelligently realizes self-focusing in optical scanning holography. This self-focusing method is applicable to various fields.

Description

technical field [0001] The invention relates to the field of optical scanning holography and the field of deep learning, in particular, to an optical scanning holography self-focusing method based on classification learning and dichotomy. Background technique [0002] Optical scanning holography, or OSH for short, 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 microscopy, 3D image recognition, and 3D optical remote sensing. [0003] In the field of holography, image reconstruction has always been a research hotspot in this field, and for the reconstruction of holograms, finding the focal position of the hologram is a key step in the reconstruction process. In recent years, deep learning has become a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03H1/04
CPCG03H1/0443
Inventor 欧海燕吴勇邵维王秉中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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