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    • 46. 发明授权
    • Observation optical system for endoscopes
    • 内窥镜观察光学系统
    • US5424877A
    • 1995-06-13
    • US44603
    • 1993-04-09
    • Hiroshi TsuyukiAkira Kikuchi
    • Hiroshi TsuyukiAkira Kikuchi
    • G02B23/24G02B13/22G02B13/04
    • G02B23/2407
    • An observation optical system for endoscopes configured so as to allow observation of objects located in liquids, comprising an objective lens system and relay lenses for relaying an image formed by the objective lens system, and satisfies the following conditions (1) and (2):0.08.ltoreq.N.sub.w .multidot.f tan [sin.sup.-1 {(1/N.sub.w) sin .theta..sub.Al }]/I.sub.1 .ltoreq.1.18 (1)0.9.ltoreq.N.sub.w .multidot.f.multidot.tan[sin.sup.-1 {(1/N.sub.w) sin .theta..sub.A0.5 }]/I.sub.0.5 .ltoreq.1.1 (2)wherein the reference symbol f represents a focal length of the objective lens system, the reference symbol N.sub.w designates a refractive index of a liquid, the reference symbols .theta..sub.Al and .theta..sub.A0.5 denote field angles at the maximum image height and a half of the maximum image height in water respectively, and the reference symbols I.sub.1 and I.sub.0.5 represent a maximum image height and a half of the maximum image height.
    • 一种用于内窥镜的观察光学系统,其被配置为允许观察位于液体中的物体,包括物镜系统和用于中继由物镜系统形成的图像的中继透镜,并且满足以下条件(1)和(2): 0.08
    • 47. 发明授权
    • Illumination system for endoscopes
    • 内窥镜照明系统
    • US5143435A
    • 1992-09-01
    • US591806
    • 1990-10-02
    • Akira Kikuchi
    • Akira Kikuchi
    • A61B1/06F21V8/00G02B6/42G02B23/26
    • G02B6/4298G02B6/0006Y10S362/804
    • An optical system for endoscopes comprising a light source and a condenser optical system for focusing the light emitted from said light source, and adapted so as to lead the light emitted from said light source to be incident through said condenser optical system onto light guides having different NA's, said condenser optical system being equipped with a means capable of varying or adjusting NA of the light emerging from said condenser optical system in conjunction with NA of a light guide selected for use. This optical system for endoscopes permits matching NA of the emerging light bundle with the NA of the selected light guide by using the adjusting means, thereby improving light distribution characteristic and transmission efficiency.
    • 一种用于内窥镜的光学系统,包括光源和聚光器系统,用于聚焦从所述光源发射的光,并且适于将从所述光源发射的光引导通过所述聚光镜系统入射到具有不同光导的光导体上 NA的,所述聚光光学系统配备有能够结合选择使用的光导的NA来改变或调整从所述聚光器光学系统出射的光的NA的装置。 这种用于内窥镜的光学系统允许通过使用调节装置将出现的光束的NA与所选择的光导的NA匹配,从而改善光分布特性和传输效率。