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A coupling objective lens for confocal microendoscope

A technology of confocal microscopy and coupled objects, applied in the field of coupled objective lenses

Active Publication Date: 2021-08-03
JINGWEI SHIDA MEDICAL TECH WUHAN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, it is a problem to be solved to design a coupling objective lens that can aim at excitation light and fluorescence achromatism, large working distance, matching numerical aperture and optical fiber bundle numerical aperture, and good coupling performance.

Method used

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  • A coupling objective lens for confocal microendoscope
  • A coupling objective lens for confocal microendoscope
  • A coupling objective lens for confocal microendoscope

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Such as figure 1 As shown, this embodiment provides a coupling objective lens for a confocal microendoscope, including a first lens L1 with a negative refractive power, a second lens L2 with a positive refractive power, and a third lens with a negative refractive power. Lens L3, a fourth lens L4 with positive refractive power, and a fifth lens L5 with positive refractive power. The light passes through the first lens L1 , the second lens L2 , the third lens L3 , the fourth lens L4 , and the fifth lens L5 in sequence, and finally forms an image on the image plane.

[0018] Further, the first lens L1, the second lens L2, the third lens L3, the fourth lens L4, and the fifth lens L5 are all spherical lenses. Specifically, the third lens is a doublet lens consisting of a biconcave lens and a biconvex lens. This structure is more convenient for processing and simplifies the manufacturing process. The specific parameters of each lens are shown in Table 1.

[0019] Table 1 ...

Embodiment 2

[0032] The lens structure in this embodiment is the same as that in Embodiment 1, the difference is the specific parameters of each lens, see Table 2 for details.

[0033] Table 2 Specific parameters of the coupled objective lens of the confocal microendoscope (unit: mm)

[0034]

[0035] Wherein, the radius of curvature of the front surface of the first lens L1 is -8.389 mm, the radius of curvature of the rear surface is -16.130 mm, the central thickness T1 of the first lens is 14.591 mm, the rear surface of the first lens and the front surface of the second lens The central thickness of the surface is 2.939mm, the material of the first lens is H-ZLAF50D, the clear aperture of the front surface of the first lens is 5mm, and the clear aperture of the rear surface is 10.60mm;

[0036] The radius of curvature of the front surface of the second lens L2 is 93.760 mm, the radius of curvature of the rear surface is -34.051 mm, the central thickness T2 of the second lens is 6.237 ...

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Abstract

The invention provides a coupling objective lens for a confocal microendoscope, comprising a first lens with a negative refractive power, a second lens with a positive refractive power, a third lens with a negative refractive power, and a lens with a positive refractive power. The fourth lens and the fifth lens with positive refractive power are sequentially arranged along the optical axis from the object side to the image side. The coupling objective lens strictly controls the incident and exit angles of the light through the cooperation between the lenses, achromatizes the excitation light and the fluorescence signal, and makes the numerical aperture match the numerical aperture of the fiber bundle while ensuring a large working distance.

Description

technical field [0001] The invention relates to the technical field of a probe type confocal endoscope, in particular to a coupling objective lens for a confocal microendoscope. Background technique [0002] The probe-type confocal microendoscope is composed of two subsystems: the confocal host and the confocal probe. The former provides the functions of optical drive and partial fluorescence signal collection, and the latter transmits the optical drive coupled from the former, while collecting in a flexible way. fluorescent signal. The interaction between these two subsystems is through the coupled objective lens. Because the coupling objective acts as a bridge between the past and the future, the performance of the coupling objective and the matching of the optical parameters of the entire system are very important. [0003] In order to adapt to the observation of biological specimens and the conversion between objective lenses, various standard documents, such as "GB / T ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B23/24G02B13/00
CPCG02B13/005G02B23/243
Inventor 万勇冯宇
Owner JINGWEI SHIDA MEDICAL TECH WUHAN CO LTD