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Miniature bifocus objective lens probe

A dual focus, microscope objective lens technology, applied in the field of optical technology devices, can solve the problems of inability to image, no axial scanning ability, entering the human body, etc., and achieve the effect of small external size

Active Publication Date: 2013-06-12
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

"The disadvantages are as follows: 1. The outer diameter of the design is 7 mm, which cannot enter the human body through the working channel of a conventional endoscope; 2. The probe has no axial scanning ability, and cannot simultaneously analyze the cell morphology of the surface layer of the gastric mucosa and the deep glandular tissue. imaging

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  • Miniature bifocus objective lens probe

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Embodiment Construction

[0016] The invention includes a miniature bifocal microscope objective lens group 1 and an imaging fiber bundle 2. The imaging fiber bundle 2 is arranged in front of the miniature bifocal microscope objective lens group 1. The miniature microscope objective lens group 1 has a pupil at infinity and has dual focus imaging capabilities. The focal lengths are 50μm and 200μm, respectively. It can simultaneously image the shallow layer 6 and the deep layer 7 of the sample, with numerical apertures of 0.5 and 0.4, respectively. The numerical aperture of the miniature microscope objective lens group in the image space matches the numerical aperture of the single fiber of the imaging fiber bundle.

[0017] The micro dual-focus microscope objective lens group 1 includes a collimating lens unit 3, a focusing lens 4 and an aperture stop 5. The collimating lens unit 3 is behind the optical fiber bundle 2 and before the aperture stop 5; the aperture stop 5 is behind the collimating lens unit ...

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Abstract

The invention relates to a miniature bifocus objective lens probe for a confocal endoscopic microscope, belonging to the technical field of optics. The miniature bifocus objective lens probe comprises a miniature bifocus microobjective group and an imaging optic fiber bundle, wherein the imaging optic fiber bundle is arranged in front of the miniature bifocus microobjective group. The pupil of the miniature bifocus microobjective group is at infinity, has a bifocus imaging capability and can be used for simultaneously imaging a superficial layer and a deep layer of a sample. The numerical aperture of the miniature bifocus microobjective group at the optical fiber bundle end is matched with that of single optical fiber of the imaging optical fiber bundle. According to the miniature bifocus objective lens probe, the size is limited within a range that the miniature bifocus objective lens probe can enter the human body through a conventional endoscope working channel, light is focused on two focal planes with different depths, and fluorescent light generated by the focal planes is collected and then returned into a confocal endoscopic imaging system.

Description

Technical field [0001] The invention relates to a device in the optical technology field, in particular to a miniature bifocal objective lens probe suitable for confocal endoscopes. Background technique [0002] In our country, the incidence and mortality of gastrointestinal tumors rank among the forefront of malignant tumors, and early diagnosis can effectively improve the survival rate. Simultaneous detection of mucosal surface cell morphology and deep microvascular structure and acquisition of histological imaging results can help early diagnosis and classification of gastrointestinal tumors. Confocal microendoscopy is one of the latest endoscopic imaging technologies. It can perform in-vivo high-resolution imaging at the same time as ordinary endoscopy, obtain real-time mucosal histological imaging results, and provide doctors with clinical diagnosis and cancer prognosis provide help. The miniature objective lens probe is one of the key technologies of confocal microendosco...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B23/26G02B21/02G02B15/00A61B1/00
Inventor 付玲杨莉张红明刘谦袁菁
Owner HUAZHONG UNIV OF SCI & TECH
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