Two-dimensional scan fiber optic probe for endoscopic optical coherence tomography

A technology of optical coherence tomography and two-dimensional scanning, applied in the field of optical coherence tomography, can solve the problems of high manufacturing cost and difficulty, low light energy coupling efficiency, complex manufacturing process, etc., and achieve simple manufacturing process and small volume , the effect of improving safety

Inactive Publication Date: 2010-05-26
ZHEJIANG UNIV
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  • Abstract
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Problems solved by technology

The above-mentioned methods all have their inherent advantages and disadvantages. For example, the scanning probe based on rotating optical components and optical couplers has low coupling efficiency of light energy, requires precise optical alignment, and the probe size is relatively large; based on MEMS technology ...

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  • Two-dimensional scan fiber optic probe for endoscopic optical coherence tomography
  • Two-dimensional scan fiber optic probe for endoscopic optical coherence tomography
  • Two-dimensional scan fiber optic probe for endoscopic optical coherence tomography

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the purpose and effect of the present invention will become more obvious.

[0018] like figure 1 As shown, the two-dimensional scanning optical fiber probe for endoscopic optical coherence tomography of the present invention includes: an asymmetric optical fiber cantilever structure 1, a gradient index lens 2, a dichroic film layer 3, a position-sensitive detector 4, and a packaging shell 5. Position-sensitive detector cable 6. Piezoelectric ceramic double chip cable 7. The light incident end surface of the gradient index lens 2 is coated with a dichroic film layer 3, and a part of the laser light emitted by the asymmetric fiber cantilever structure 1 in vibration hits the position sensitive detector 4 through the reflection of the dichroic film layer 3 , an asymmetric fiber cantilever structure 1, a gradient index lens 2, a dichroic film layer 3, an...

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Abstract

The invention discloses a two-dimensional scan fiber optic probe for endoscopic optical coherence tomography. The fiber optic probe is based on an asymmetric fiber cantilever structure which can form two independent orthogonal resonant modes which are mutually unaffected; and by using a single driving signal which comprises two resonant signal components, the two orthogonal resonant modes of the asymmetric fiber cantilever can be simultaneously excited to form a two-dimensional Lissajous scan pattern. The provided two-dimensional scan fiber optic probe based on the asymmetric fiber cantilever structure forms lens fibers by using single mode fibers and gradient index fibers, and then combines with a gradient index lens to realize the illumination of samples and the collection of backward scattered light. The two-dimensional scan fiber optic probe uses a position-sensitive detector integrated in the probe, can record the two-dimensional paths of the emergent light of the fiber optic probe in real time in an imaging cross section, and can realize accurate reconstruction of scan position information.

Description

technical field [0001] The invention relates to optical coherence tomography (OCT) technology, in particular to a two-dimensional scanning optical fiber probe for endoscopic optical coherence tomography. Background technique [0002] Optical coherence tomography (OCT) is an emerging biomedical optical imaging technology, which can realize non-contact, non-damaging, high-resolution imaging of the structure and physiological functions of biological tissues, and can be used in the early stages of diseases. It has broad application prospects in the field of detection and in vivo biopsy. [0003] Optical coherence tomography technology has been developed so far, and has formed three types: time-domain OCT system, spectral domain OCT system and frequency-swept OCT system. The early time-domain OCT system achieved tomography of biological samples through axial mechanical scanning, and the spectral domain OCT system and swept-frequency OCT system could image without axial scanning,...

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Application Information

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IPC IPC(8): A61B5/00G01N21/45
Inventor 丁志华吴彤陈明惠王凯孟婕王玲徐磊王川
Owner ZHEJIANG UNIV
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