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Optical scanning holographic single-point positioning method based on TR-MUSIC algorithm

An optical scanning, single-point positioning technology, applied in the field of optical scanning holography single-point positioning, can solve the problems of complex optical scanning holography technology and lack of positioning accuracy.

Inactive Publication Date: 2017-08-04
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] At present, the optical scanning holographic technology is relatively complicated to implement, and it is also lacking in the accuracy of positioning.

Method used

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  • Optical scanning holographic single-point positioning method based on TR-MUSIC algorithm
  • Optical scanning holographic single-point positioning method based on TR-MUSIC algorithm
  • Optical scanning holographic single-point positioning method based on TR-MUSIC algorithm

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Embodiment

[0073] Such as figure 1 , the optical scanning holographic single-point positioning method based on the TR-MUSIC algorithm provided by the present invention uses the TR-MUSIC algorithm to process the hologram, thereby realizing the positioning of the detection target, which has high precision and is quite accurate in positioning; this is based on The optical scanning holographic single-point positioning method based on the TR-MUSIC algorithm is not only simple to implement and easy to operate, but also has strong practicability and is suitable for popularization and use.

[0074] This optical scanning holographic single-point positioning method based on the TR-MUSIC algorithm adopts the following methods: figure 2 The structure shown is realized, and the structure specifically includes a first polarizing beam splitter BS1, a second polarizing beam splitter BS2, a first pupil p1(x,y), a second pupil p2(x,y), a second pupil p2(x,y), A convex lens L1, a second convex lens L2, a...

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Abstract

The invention discloses an optical scanning holographic single-point positioning method based on a TR-MUSIC algorithm. The problem that the positioning accuracy is not high enough and the implementation mode of positioning is complicated in the prior art is solved. The method comprises the following steps: first, converting laser into a Fresnel zone plate, scanning an object to get a hologram of the object, and performing Fourier transform on the hologram to get a matrix K; then, getting a time inversion matrix of the object through the matrix K, calculating out the feature value and the feature vector of the object, and decomposing the hologram into a signal sub-space and a noise sub-space; and finally, discretizing the object in an equidistant manner through a finite element method, taking each unit as a test target and getting a hologram of each unit as a test target, getting the imaging pseudo spectrum of the object according to the orthogonality of the signal sub-space and the noise sub-space of the hologram, and getting the position information of a detected target. The method is simple to implement and easy in operation, has strong practicability, and is suitable for popularization and use.

Description

technical field [0001] The invention relates to an optical scanning holographic single-point positioning method based on a TR-MUSIC algorithm. Background technique [0002] Optical scanning holography, referred to as OSH, is an important branch of digital holography. It uses optical scanning technology to store the 3D information slice of the object as 2D information, so as to obtain the hologram of the object. This technology was proposed by Poon and Korpel in 1979 when they were studying the acousto-optic heterodyne image processor. Since the technology was proposed, it has been widely used in the fields of scanning holographic microscope, 3D image recognition and 3D optical remote sensing. [0003] At present, the optical scanning holography technology is relatively complicated to implement, and it is also lacking in the accuracy of positioning. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide an optical sca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03H1/22
CPCG03H1/2249G03H2001/2255
Inventor 欧海燕吴勇邵维王秉中
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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