HIGH-SPEED LENS Russian patent published in 2002 - IPC

FIELD: optics. SUBSTANCE: proposed high-speed lens has five components. First component is biconvex lens, second component presents negative lens made in the form of plano-concave lens, third component comes in the form of biconvex lens which second surface is aspherical, fourth component is biconvex lens and fifth components presents biconcave lens. All relations specified in formula of invention are realized. Such approach ensures creation of high-speed lens with relative aperture not less than 1:1/6, angular field in space of objects of 38 degrees and length of optical system not more than 2,4 f′, where f′ is focal distance of high-speed lens. EFFECT: good quality of image of dot on axis and in field. 3 dwg