A disordered medium channel analysis device and method
A medium channel and analysis device technology, which is applied in the field of disordered medium channel analysis devices, can solve the problems of inapplicability, inability to analyze synchronous changes of light intensity on both sides at the same time, and little research on the relationship, so as to achieve the effect of improving accuracy
Active Publication Date: 2021-09-28
NANJING UNIV OF SCI & TECH
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In addition, most of the discussions on the channels of disordered media in the existing literature are also based on the beam on a specific side, discussing the distribution of the eigenvalues corresponding to each channel, exploring the channel that has the greatest impact on the light intensity on this side, and working to make the beam Coupled into this channel, but there is little research on the relationship between the channels of the beams on both sides. It is impossible to analyze the synchronous changes of the light intensity on both sides when coupling a beam of light, and their corresponding relationship. It is not suitable for simultaneous use of two beams. The case for side-lit information
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[0045] Disordered media channel analysis method, the specific steps are:
[0046] Step 1. Build as figure 1 The disordered media channel analysis setup shown. Among them, the light source 1 is a continuous solid-state laser, the model is MGL-III-532-300mW, the wavelength is 532nm, and it emits green visible light. The model of the first lens 2 is ThorlabsLB1014-A, and its focal length is 25mm. The model of the second lens 3 is Thorlabs LB1437-A, and its focal length is 150 mm. The spatial light modulator 4 is a liquid crystal spatial light reflective modulator, the model is Holoeye PLUTO-VIS-016, and the number of pixels is 1920*1080. The model of the first beam splitter 5-1 and the second beam splitter 5-2 included in the optical path deflection system 5 are the same as BS013, and the beam splitting ratio is 50:50. The model of the beam splitter 6 is BS013, and the splitting ratio is 50:50. The model of the first microscope 7 and the second microscope 9 are the same as E...
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The present invention proposes a disordered medium channel analysis device and method. The method first generates a Hadamard image of a specified size through a computer and loads it into the optical path system, collects an image and saves the image each time it is loaded; then passes the Hadamard image and The transmission matrix corresponding to the transmission and reflection of the disordered medium is calculated from the sensor image; secondly, the singular value decomposition of the transmission and reflection transmission matrices is performed respectively to obtain the corresponding transmission channel matrix; finally, the two corresponding transmission channel matrices are determined according to the transmission and reflection transmission matrices. Relative mapping coefficients for group transport channels. The invention can qualitatively express the relative light intensity of the same incident light on both sides of reflection and transmission by calculating the mapping coefficient.
Description
technical field [0001] The invention relates to disordered medium technology, in particular to a disordered medium channel analysis device and method. Background technique [0002] Disordered media are ubiquitous in life, and the atmosphere, biological tissues, and even oceans can be classified into this category, so the study of disordered media is of great significance. [0003] The research methods for disordered media in the prior art include focusing and imaging the transmitted or reflected scattered light beams of the disordered media by wavefront shaping method, phase conjugation method or transmission matrix method. In the existing literature, most of these methods are used to analyze the beam on one side of the disordered medium. However, in real life, the beam on the specified side may not be collected. Therefore, the beam on the target side and the opposite side are studied. The relationship between them has very important practical significance. In addition, mo...
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IPC IPC(8): G01N21/84G01N21/01
CPCG01N21/01G01N21/84
Inventor 辛煜李扬彦王林李婧御吴钰张也韩伟
Owner NANJING UNIV OF SCI & TECH