FAST HIGH-SPEED LENS Russian patent published in 2007 - IPC G02B9/64 

FIELD: optics; CCD technology.

SUBSTANCE: fast high-speed lens can be used as objective of video camera to form image onto CCD-array and at operation with different image receivers. Lens has eight components disposed in sequence onto optical axis, and aperture diaphragm disposed between second and third components. First and second components are positive menisci turned with their concave surfaces to space of images. Third component has to be double-glued lens made of biconvex lens and of positive meniscus. Fourth, fifth and second components are positive lenses. Seventh component has to biconvex lens and additional eighth component has to be positive meniscus turned with its concave surface to space of images. Fifth component has to be biconvex lens; sixth component has to be positive meniscus turned with its concave surface to space of images. Thickness of second component has to be equal to at least 0,15 focal length of lens. Distance between second and third components has to be equal at least to 0,25 focal length of lens. Optical power of eight component equals to at least 0,3 optical power of lens. Modulation transmission factor is increased and distortion of lens is reduced.

EFFECT: improved quality of image.

7 dwg