Phase difference spectral domain OCT device and method capable of eliminating OCT conjugate mirrors
A mirror image and conjugate technology, which is applied in the field of phased difference spectral domain OCT devices, can solve the problems of inaccurate phase shifting accuracy and phase shifting stability, and achieve the effects of strong anti-interference ability, simple structure, and low R&D cost
Active Publication Date: 2019-02-01
FUZHOU UNIV
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[0003] In view of this, the purpose of the present invention is to provide a phase-difference spectral domain OCT device that can eliminate OCT conjugate images, which has a simple structure and can effectively solve the problems of inaccurate phase-shifting accuracy and phase-shifting stability of traditional phase-shifting methods
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[0043] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0044] Please refer to figure 1 , the present invention provides a phase-difference spectral-domain OCT device capable of eliminating OCT conjugate images, which is characterized in that it includes a superluminescent light-emitting diode 1, a first collimator 2, a focusing objective lens 3, a first beam splitter 7, a first Two beam splitters 8, the third beam splitter 23, the fourth beam splitter 24, the first reflector 9, the sample 25, the optical switch 10, the spectrometer; The parallel light is collimated into a beam of parallel light by the device 2; the parallel light is focused by the focusing objective lens 3, and after focusing, it is divided into two beams of light with equal power by the first beam splitter 7, one beam is the sample light, and the other beam is the reference beam; the sample The light is directed to the sample 25, and the ...
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The invention relates to a phase difference spectral domain OCT device capable of eliminating OCT conjugate mirrors, comprising a super luminescent diode, a first collimator, a focusing objective lens, a first beam splitter, a second beam splitter, a third beam splitter, a fourth beam splitter, a first reflector, a sample, an optical switch, a spectrometer. The device has a simple structure and can effectively solve the problem of inaccurate phase shift accuracy and phase shift stability of the traditional phase shifting method. At the same time, the switching of the optical switch is combinedwith the single spectrometer acquisition method instead of the dual spectrometer acquisition method in the signal acquisition, which makes the two interference signals have higher consistency, lowersystem design cost and higher commercial value.
Description
technical field [0001] The invention relates to a phase difference spectral domain OCT device and method capable of eliminating OCT conjugate mirror images. Background technique [0002] In the traditional spectral domain OCT, because the collector can only collect the real signal of the sample, there will be two images relative to the zero optical path during imaging, that is, the real image and the conjugate image. In the traditional method of removing the conjugate image, most of the phase shifting methods use the data acquisition card to control the voltage output to drive the piezoelectric ceramics for phase shifting. The accuracy and stability of the phase obtained by this method are greatly affected by the performance of piezoelectric ceramics, and at least two signals need to be collected at the same position, which affects the imaging speed and is not conducive to real-time imaging; 3×3 fiber coupler method The 3×3 fiber coupler is used to obtain two phase interfer...
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IPC IPC(8): G01J3/12G01J3/26
CPCG01J3/12G01J3/26Y02A90/10
Inventor 钟舜聪林杰文张秋坤陈伟强钟剑锋周宁
Owner FUZHOU UNIV