Optical: systems and elements – Lens – Multiple component lenses
Reexamination Certificate
2008-12-18
2010-02-09
Dinh, Jack (Department: 2873)
Optical: systems and elements
Lens
Multiple component lenses
C359S755000
Reexamination Certificate
active
07660048
ABSTRACT:
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.
REFERENCES:
patent: 3736049 (1973-05-01), Shimizu
patent: 5724195 (1998-03-01), Enomoto et al.
patent: 7057830 (2006-06-01), Ebbesmeier
patent: 1649492 (1991-05-01), None
patent: 1663596 (1991-07-01), None
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.
Dinh Jack
Houston Eliseeva LLP
ZAO “Impulse”
LandOfFree
Wide angle lens with large aperture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Wide angle lens with large aperture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Wide angle lens with large aperture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4210217