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Optical filter for fluorescent endoscope

A filter and endoscope technology, applied in optics, optical components, instruments, etc., can solve the problems of affecting the quality of spectral imaging, low filter transmittance, shallow cut-off depth, etc., and achieve easy and simplified process implementation. Endoscopic imaging system, the effect of simplified structure

Active Publication Date: 2022-01-18
SHENYANG ACAD OF INSTR SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of this structure: 1. Due to the use of two CMOS receivers with optical filters, and then through the processing of composite images, the structure is complex and inconvenient to users; 2. The transmittance of the optical filters used is low and the cut-off depth is shallow. Greatly affects the imaging quality of the spectrum

Method used

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  • Optical filter for fluorescent endoscope
  • Optical filter for fluorescent endoscope
  • Optical filter for fluorescent endoscope

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Embodiment Construction

[0023] As shown in the figure, the fluorescent endoscope filter is composed of a substrate and a wide transmission band deep background negative filter film system; among them, the wide transmission band deep background negative filter film system has the following characteristics under incident conditions : The wavelength range between the double transmission area and the cut-off area is less than 3nm; the range of the double broadband transmission area reaches more than 350nm (it has met the requirements for the use of endoscope filters, and the actual transmission area can be designed wider).

[0024] The basic structure of the high-steep depolarization film system of the present invention is:

[0025] S|(αHβLγHβLαH)^ n |A; where: S is glass substrate; A is air; H is high refractive index material; L is low refractive index material; the optical thickness of H and L is λ 0 / 4; α, β, γ, respectively represent the matching coefficient of different materials; n is the number ...

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Abstract

The invention belongs to the field of optical filters, and particularly relates to an optical filter for a fluorescent endoscope. The optical filter consists of a K9 glass substrate and a wide-transmission-band deep-background negative optical filter film system, under the incident condition, the wide-transmission-band deep-background negative optical filter film system has the following characteristics: the wavelength range between the double-transmission region and the cut-off region is less than 3 nm; the range of the double-broadband transmission area reaches 350 nm or more (the use requirement of an endoscope optical filter is met, and the range of the actual transmission area can be designed to be wider); the basic structure of the wide-transmission-band deep-background negative optical filter film system is S|(alpha H beta L gamma H beta L alpha H) n|A, wherein S is a glass substrate; a is air; H is a high refractive index material; L is a low-refractive-index material; the optical thickness of H and L is lambda 0 / 4; alpha, beta and gamma respectively represent matching coefficients of different materials; and n is the number of cycles. The optical fiber has high gradient, a wide transmission band and a deep cut-off background during incidence.

Description

technical field [0001] The invention belongs to the field of optical films, in particular to a filter for fluorescence endoscope. Background technique [0002] Endoscope is a necessary equipment for minimally invasive surgery. In addition to the original functions of endoscope, fluorescence endoscope can also display fluorescently marked lesions in real time to reduce the difficulty of surgery. It is widely used in surgery (gastrointestinal, hepatobiliary, thyroid, Breast, etc.), gynecology, urology, thoracic surgery, etc. inspection, diagnosis and treatment. The fluorescent reagent used in the fluorescence endoscope is indocyanine green (ICG). The excitation spectrum of ICG is mainly in the range of 770nm-810nm, and the emission spectrum is mainly in the range of 810nm-850nm. Combining the fluorescence characteristics of ICG and visible spectrum imaging to design filters: 1. Satisfy high-definition imaging of visible light, with high transmission in the spectrum of 400nm-7...

Claims

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Application Information

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IPC IPC(8): G02B5/28
CPCG02B5/285
Inventor 王忠连阴晓俊赵帅锋任少鹏高鹏班超张轶黄宏宇
Owner SHENYANG ACAD OF INSTR SCI
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