Method for optical super resolution based on optical path encoding and coherent synthesis
A coherent combination and super-resolution technology, applied in the field of optical super-resolution methods and systems, can solve the problem that the optical path parameter has not been introduced into the field of super-resolution, and achieve the goal of avoiding the speed limit of information acquisition, simple and easy method, and increased degree of freedom Effect
Inactive Publication Date: 2011-11-09
ZHEJIANG UNIV
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The introduction of the polarization state adds a new degree of freedom to super-resolution, but the optical path parameter has not been introduced into the field of super-resolution
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[0027] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:
[0028] figure 1 Shown is a schematic diagram of an OCT system based on optical path coding and coherent combination to achieve super-resolution. The low-coherence light emitted by the broadband light source 1 enters the reference arm 3 and the sample arm 4 after being split by the fiber coupler 2 . The light from the reference arm 4 returns to the fiber coupler 2 through the original path after being reflected by the reference surface, and the light from the sample arm 4 returns to the fiber coupler 2 through the original path after being reflected and scattered by the sample, where it merges with the light returned from the reference arm 4 and interferes , the generated interference signal is detected by the CCD in the detection arm 5 to obtain the interference spectrum related to the sample information. The rotation of the galvanometer 8 in the sample arm ...
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The invention discloses a method and a system for optical super resolution based on optical path encoding and coherent synthesis. An optical path encoding beam splitter is inserted between a collimation lens and a focusing lens of a sample arm of an optical coherent tomography (OCT) system to form various effective response functions corresponding to different optical path delays. Based on the inherent optical path resolving power of an OCT technique, a plurality of images of a same sample corresponding to different effective response functions are obtained respectively. Based on the coherentsynthesis of various effective response functions, optical super resolution images are reestablished from information on a plurality of independent images. By changing relative coefficients during coherent synthesis, the relative contributions of various effective response functions can be controlled digitally to realize super resolutions with different degrees. The method and the system introduce optical path parameters into a focused light field for control so as to provide add-subtract calculation functions for point spread functions, and open up a new way for an optical super resolution technique.
Description
technical field [0001] The present invention relates to optical path coding technology, optical super-resolution technology and optical coherence tomography imaging technology, in particular to an optical super-resolution method and system based on optical path coding and coherent synthesis. Background technique [0002] Optical coherence tomography (OCT) is an emerging optical imaging technology. Compared with traditional clinical imaging methods, it can achieve non-contact, non-invasive, High-resolution imaging is an important potential tool for basic medical research and clinical diagnostic applications. [0003] Resolution is an important indicator for the development of OCT technology. The lateral resolution of OCT is determined by the focusing conditions of the probe beam. The focusing condition of large numerical aperture can improve the lateral resolution of the system, but at the same time sacrifices the depth of focus, because the lateral resolution and depth of ...
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IPC IPC(8): A61B5/00G02B27/28G01N21/45
Inventor 丁志华孟婕王凯王玲陶渊浩王保勇商在明黄良敏
Owner ZHEJIANG UNIV