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Focusing lens for dual-wavelength OCT system

A focusing lens, dual-wavelength technology, applied in the field of focusing lens, can solve the problems of loss, convergence to the same position, etc.

Inactive Publication Date: 2009-01-28
NANKAI UNIV
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Problems solved by technology

The focusing lens of the sample arm has different focal lengths for different wavelength lasers. It is impossible to converge the two wavelengths of laser light to the same position with a single lens, that is, the smallest spot of the two lasers cannot be obtained at the same position at the same time, thus losing The significance of using two wavelengths of laser light at the same time

Method used

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  • Focusing lens for dual-wavelength OCT system
  • Focusing lens for dual-wavelength OCT system
  • Focusing lens for dual-wavelength OCT system

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the drawings and embodiments.

[0013] In order to meet the requirement of two wavelengths in the dual-wavelength OCT system for simultaneous measurement of the same position of the sample, we must carry out a special processing design for the sample arm focusing lens of the dual-wavelength OCT system. According to the above application requirements, the present invention carries out the special invention design of the sample arm focusing lens of the dual-wavelength OCT system. This lens can be applied to the dual-wavelength OCT system or even the multi-wavelength OCT system.

[0014] The design of the focusing lens of the present invention adopts the principle of ray tracing, by changing the thickness of the lens and the distance between the lens, and the material of the lens, and optimize the design to reduce the number of lenses and the number of materials used, with the least cost Get a good focus...

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Abstract

The invention relates to an amasthenic lens used for a dual wavelength OCT system. The amasthenic lens carries out excellent correction of image differences such as ball difference, can obtain small facula and effectively improves the resolution of the OCT system; more importantly, the amasthenic lens excellently corrects the colour difference and can be used for the OCT system detection imaging of dual wavelength or multi-wavelength. The amasthenic lens has the advantages of simple structure, low cost, small image difference and clear imaging.

Description

Technical field [0001] The invention belongs to the technical field of optical lenses, and particularly relates to a focusing lens used in a dual-wavelength OCT system. Background technique [0002] OCT (Optical Coherence Tomography, Optical Coherence Tomography) is a non-destructive tomography technology based on interferometry. It combines the advantages of coherence gate technology and space gate technology, and can effectively filter out various impurities that are not related to signal light. Astigmatism has become a promising imaging diagnostic technique. Using different wavelengths of light to perform OCT detection on biological tissues, the obtained images and detection depth may be different. Using OCT technology to study the spectral characteristics of biological tissues has formed a new functional OCT technology-wavelength dependent OCT technology. Multi-wavelength OCT technology is a kind of wavelength-dependent OCT technology, and the most commonly used by researcher...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B27/00A61B5/00G01B9/02
Inventor 叶青周文远刘宇田建国
Owner NANKAI UNIV
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