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    • 1. 发明授权
    • IR fast low light level lens system
    • 红外快速低光级镜头系统
    • US5386315A
    • 1995-01-31
    • US71610
    • 1993-06-04
    • Max AmonJohn Tejada
    • Max AmonJohn Tejada
    • G02B13/14G02B13/18G02B15/16
    • G02B13/18G02B13/14
    • A compound lens for use in a low light level system operating in the near-infrared region. The lens system includes a high light-gathering ability requiring both a large aperture and good transmissivity over the wavelengths of interest. A wide field of view (e.g., 50.degree.) without excessive chromatic and geometric aberrations that generally accompanies systems with a large aperture is provided. Space is provided in the lens system for a variable iris and variable density spot subassembly. Desired optical quantities are obtained through the use of zinc selenide as the material for an aspheric lens. The use of this diamond-turnable infrared material as a field lens yields exceptional performance for a fast (e.g., F/1.25) lens with a wide field of view.
    • 一种复合透镜,用于在近红外区域工作的低光级系统。 透镜系统包括高光聚合能力,其需要在感兴趣的波长上具有大的孔径和良好的透射率。 提供了通常伴随着具有大孔径的系统的宽视场(例如,50度)而没有过多的色度和几何像差。 在透镜系统中提供用于可变虹膜和可变密度斑点子组件的空间。 通过使用硒化锌作为非球面透镜的材料获得期望的光学量。 使用这种金刚石可转换红外线材料作为现场透镜,对于具有宽视野的快速(例如F / 1.25)透镜而言,具有出色的性能。