A method and system for acquiring a multimode optical fiber imaging transmission matrix
A technology of multi-mode fiber and transmission matrix, which is applied in the field of obtaining multi-mode fiber imaging transmission matrix, can solve the problems of difficult operation of spatial fiber coupling, consumes a lot of time and energy, and shortens the experiment time, simplifies the difficulty of operation, and is easy to realize. Effect
Active Publication Date: 2018-12-18
HUAZHONG UNIV OF SCI & TECH
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[0005] In view of the defects of the prior art, the purpose of the present invention is to solve the problem that the existing multimode fiber transmission matrix measurement scheme needs to change the incident angle of the laser coupling into the multimode fiber, and the position of the multimode fiber must also be changed, which needs to be repeated thousands of times. Coupling steps, which are difficult to operate for spatial fiber coupling, technical issues that require a lot of time and effort
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[0044] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.
[0045] figure 1 The optical path diagram of the multimode optical fiber imaging transmission matrix system provided for the present invention. Such as figure 1 As shown, it includes: He-Ne laser 1, first polarization controller 2, spatial filter 3, beam expander 4, polarization beam splitter 5, third mirror 6, first beam splitter 7, second mirror 8. The first mirror 9, the fourth beam splitte...
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The invention discloses a method and system for acquiring a multimode optical fiber imaging transmission matrix. By introducing a beam splitter between the exit face of the multimode optical fiber andthe object target, an object target is imaged on the first imaging module before the multimode fiber and the second imaging module after the multimode fiber respectively, and then the object target is interfered with the reference light respectively, and the complex optical field image of the object reflected light without the multimode fiber and the complex optical field image disturbed by the optical fiber after passing through the multimode fiber are calculated by the holographic algorithm. N holograms corresponding to the first imaging module and the second imaging module at N different positions are recorded by moving the object target, and then N holograms corresponding to different positions are recovered by holographic algorithm, and the transmission matrix of multi-mode optical fiber imaging is calculated. The invention only needs the moving object target to calculate the transmission matrix of the multimode optical fiber imaging, the operation is simple, the realization is easy, and a series of problems caused by repeatedly moving the multimode optical fiber are avoided.
Description
technical field [0001] The present invention relates to the technical field of realizing optical imaging based on mode characteristics of multimode optical fibers, and more specifically, relates to a method and system for obtaining multimode optical fiber imaging transmission matrix. Background technique [0002] Multimode fiber can transmit thousands of modes at the same time, and carry out parallel information transmission in so many independent spatial modes. Using a single multimode fiber instead of a fiber bundle for imaging can achieve good pixel density. Next, the diameter of the fiber optic lens is greatly reduced, thereby increasing the accessibility of the fiber optic endoscope. In the process of multimode fiber imaging, complex modes and distortion will be generated. The imaging system is a linear but space-transformed system. The point spread function of different points on the object plane is different, so the transfer matrix is used to describe from The poin...
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Login to View More IPC IPC(8): G03H1/08G03H1/10G03H1/04
CPCG03H1/0402G03H1/0465G03H1/08G03H1/10
Inventor 刘陈蔡先勇朱广颂邵叶定陈可欣黄坦刘德明
Owner HUAZHONG UNIV OF SCI & TECH