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Immersion type high-resolution small-caliber optical fiber microscope objective

A high-resolution, microscopic objective lens technology, applied in the field of optical lenses, can solve the problems of insufficient optical aperture, small distortion, and inability to guarantee imaging quality, etc., to achieve mass production, small distortion, correction of astigmatism and The effect of field curvature

Active Publication Date: 2020-09-04
熊艳辉 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above defects or improvement needs of the prior art, the present invention provides a liquid-immersion type high-resolution small-aperture optical fiber microscopic objective lens. quality while having technical issues with small distortion

Method used

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  • Immersion type high-resolution small-caliber optical fiber microscope objective
  • Immersion type high-resolution small-caliber optical fiber microscope objective
  • Immersion type high-resolution small-caliber optical fiber microscope objective

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] As a kind of specific embodiment of the present invention, the parameter of each lens element of this fiber optic microscope objective lens is as shown in table 1 below:

[0046] Table 1 Structural parameters of liquid immersion high-resolution small-aperture fiber optic microscope objective

[0047]

[0048] Wherein, the working distance of the fiber optic microscope objective lens in this embodiment is 0.06mm.

[0049] Wherein, the radius of curvature of the front surface S1 of the first lens element is infinite, the radius of curvature of the back surface S2 is -1.42 mm, the central thickness of the first lens element is 2.161 mm, the back surface S2 of the first lens element is in contact with the second lens element The central thickness of the front surface S3 is 0.05mm (that is, the air gap T12 between the first lens element and the second lens element on the optical axis is 0.05mm), and the refractive index: Abbe number of the first lens element is 1.910:35.3...

Embodiment 2

[0064] As a kind of concrete embodiment of the present invention, the parameter of each lens element of this fiber optic microscope objective lens is as shown in table 2 below:

[0065] Table 2 Structural parameter list of liquid immersion high-resolution small-aperture fiber optic microscope objective lens

[0066]

[0067]

[0068] Wherein, the working distance of the fiber optic microscope objective lens in this embodiment is 0.06 mm.

[0069] Wherein, the radius of curvature of the front surface S1 of the first lens element is infinite, the radius of curvature of the back surface S2 is -1.512mm, the central thickness of the first lens element is 2.112mm, the back surface S2 of the first lens element is in contact with the second lens element The central thickness of the front surface S3 is 0.052mm (that is, the air gap T12 between the first lens element and the second lens element on the optical axis is 0.052mm), and the refractive index: Abbe number of the first len...

Embodiment 3

[0081] As a kind of concrete embodiment of the present invention, the parameter of each lens element of this fiber optic microscope objective lens is as shown in table 3 below:

[0082] Table 3 Structural parameter list of liquid immersion high-resolution small-aperture fiber optic microscope objective lens

[0083]

[0084] Wherein, the working distance of the fiber optic microscope objective lens in this embodiment is 0.06mm.

[0085] Wherein, the radius of curvature of the front surface S1 of the first lens element is infinite, the radius of curvature of the back surface S2 is -1.342mm, the central thickness of the first lens element is 1.893mm, the back surface S2 of the first lens element is in contact with the second lens element The central thickness of the front surface S3 is 0.056mm (that is, the air gap T12 between the first lens element and the second lens element on the optical axis is 0.056mm), and the refractive index: Abbe number of the first lens element is ...

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Abstract

The invention discloses an immersion type high-resolution small-caliber optical fiber microscope objective, which belongs to the technical field of optical lenses. The microscope objective comprises afirst lens element, a second lens element, a third lens element and a fourth lens element which are sequentially arranged from an object plane to an image plane; the first lens element is a sphericalpositive lens; the second lens element is a spherical doublet lens and comprises a first lens and a second lens which are arranged in sequence, and the first lens is a negative lens; the second lensis a positive lens; the third lens element is a negative lens; the fourth lens element is a positive lens; the focal length of each lens element satisfies the following relational expression: 0.6 < f1 / f < 0.9, -3.1 < f21 / f < -1.3, 0.512 < f22 / f < 1.892, 1.49 < f2 / f < 2.5, -3.6 < f3 / f < -2.4, and 0.5 < f4 / f < 0.7. The objective of the invention is to solve the technical problems that the optical aperture of a conventional optical fiber microscope objective is not small enough, and small distortion cannot be realized while the imaging quality is ensured.

Description

technical field [0001] The invention belongs to the technical field of optical lenses, and more specifically relates to a liquid-immersion type high-resolution small-diameter optical fiber microscope objective lens. Background technique [0002] The existing hose-type confocal microendoscope based on optical fibers is mainly composed of two optical fibers, one of which is used to guide the light generated by the cold light source to the surface of the object to be observed, and illuminate the surface of the object to be measured. , and the other is used to collect the image information of the illuminated object and transmit it to the eyepiece or camera, so that the doctor can intuitively observe the surface conditions of the internal tissues of the human body and diagnose the disease timely and accurately. [0003] The fiber optic microscope objective is located at the front end of the optical fiber that conducts the image, and is the core component of the entire confocal mi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B13/00G02B23/24G02B21/02A61B1/04A61B1/00
CPCA61B1/00165A61B1/00195A61B1/04G02B13/004G02B13/006G02B21/02G02B23/243
Inventor 熊艳辉王旗朱佳巍杨文娟蔡明峻
Owner 熊艳辉
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