HIGH-SPEED LENS Russian patent published in 2002 - IPC

FIELD: infrared imaging instrumentation. SUBSTANCE: high-speed lens comprises three lenses: positive and negative meniscuses facing image with concavity and positive meniscus facing object with convexity. Radii of second and sixth optical surfaces are equal. Lens has high adaptability to manufacture and high quality of image with relative aperture 1:1.65, field of vision 2w = 6 deg and operates in spectral range from 8 to 12.5 μ.. EFFECT: high adaptability to manufacture and high quality of image. 4 cl, 1 dwg, 2 tbl