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    • 3. 发明授权
    • Illumination optical system for endoscopes
    • 内窥镜照明光学系统
    • US08647263B2
    • 2014-02-11
    • US12465088
    • 2009-05-13
    • Keiji MurataHiroshi TsuyukiDaisuke Akiyama
    • Keiji MurataHiroshi TsuyukiDaisuke Akiyama
    • A61B1/00A61B1/04
    • A61B1/00096A61B1/0623
    • The invention provides lenses at low cost, which form an illumination optical system for endoscopes that has high efficiency and achieves improved light distribution. The illumination optical system for endoscopes is used in opposition to a light beam exit end 1 of a transmission means F for light emitted from a light source, and comprises, as viewed from the light beam exit end 1, a lens group 10 having positive power and an optical member 20 subsequent thereto which has a spherical surface 20a that functions as a lens, has a radius of curvature R, and satisfies the following condition: 1.48≦S/πR2≦4  (1) where R is the radius of curvature of the spherical surface, in mm, and S is a surface area of the spherical surface, in mm2.
    • 本发明以低成本提供镜片,其形成了具有高效率并实现改进的光分布的用于内窥镜的照明光学系统。 用于内窥镜的照明光学系统与发射装置F的光束出射端1对应,用于从光源发射的光,并且包括从光束出射端1观察具有正光焦度的透镜组10 以及具有作为透镜起作用的球面20a的光学构件20具有曲率半径R,满足以下条件:1.48 @ S / piR2 @(1)其中R是曲率半径 球面以mm为单位,S为球面的表面积,单位为mm2。