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Wide angle lens with large aperture - US7660048B1

发明人 KOZODOI VALERY V [RU]
申请人 ZAO IMPULSE [RU]
申请号 US20080338081
申请日 2008-12-18
文献号 US7660048
公开日 2010-02-09
IPC
ECLA
优先权 US20080338081
引证专利 SU1649492A1 WIDE-ANGLE HYDROLENS 1991-05-15
SU1663596A1 FAST OBJECTIVE 1991-07-15
US3736049A WIDE ANGLE PHOTOGRAPHING LENS 1973-05-29
US5724195A Fast super wide-angle lens system 1998-03-03
US7057830B2 High-aperture wide angle cinema projection lens 2006-06-06
参考文献 - Kozodoi, V. V., "Synthesis of a fast wide-angle photographic objective lens with the increased back focal length," Priborostrojenije, State Committee of the RF for higher education, Bulletin of higher education establishments, vol. 37, No. 2, Feb. 1994, pp. 72-74
- Volosov, D. S., "Photographic optics," M., lskusstvo, 1978, pp. 458-459

被引用
附图
摘要 The invention is aimed at providing a lens having a wider angle of view, increased relative aperture, and higher quality of images. To achieve this technical object, there is a wide-angle lens with a large relative aperture, which contains an aperture diaphragm and seven optical components arranged along the pathway of luminous radiation from the object to the image as follows: the first positive component, the second one, which is a negative meniscus having the concave surface facing the image side, the third negative component, the fourth and the fifth components, the sixth negative component, the seventh positive component, and the aperture diaphragm located between the fifth and the sixth components, wherein the fourth component has a negative power and is made up of two lenses cemented together, the first lens being a biconcave one and the second lens being a biconvex one, the fifth component is a biconvex lens having a positive power, the sixth component is a single biconcave lens, the seventh component is a meniscus with its concave surface facing the object, and after the seventh component several additional ones are introduced, i.e. the eighth component, which is a biconvex lens, the ninth component having a positive power, which is cemented of two lenses, of which the first is a negative meniscus with its concave surface facing the image, and the second one is positive, the tenth component, which is a negative meniscus with its convex surface facing the image, and the eleventh component having a positive power, which is built up of two lenses cemented together, the first lens being a positive biconvex one and the second lens being a negative biconcave one.