Optical: systems and elements – Lens – With variable magnification
Patent
1997-02-19
1999-02-23
Epps, Georgia
Optical: systems and elements
Lens
With variable magnification
359691, 359717, 359725, 359740, 359742, 359753, 359793, G02B 1514, G02B 302, G02B 1306, G02B 904
Patent
active
058750592
ABSTRACT:
Variable focal length lens system comprises two adjacent lens units, one stationary, the other movable. These lens units are in order from an object side towards an image side
(i) A first lens unit possessing divergent refractive power. The first lens unit is the front most lens unit. It consists of a single negative lens component.
(ii) A second lens unit possessing convergent refractive power. The second lens unit, includes at least two positive power lens components and an aperture stop.
REFERENCES:
patent: 3466113 (1969-09-01), Bertele
patent: 3942874 (1976-03-01), Besenmatter et al.
patent: 4099844 (1978-07-01), Bertele
patent: 4203653 (1980-05-01), Mori
patent: 4585314 (1986-04-01), Tateoka
patent: 4856880 (1989-08-01), Ohshita
patent: 5278698 (1994-01-01), Iizuka et al.
patent: 5315441 (1994-05-01), Hori et al.
patent: 5710670 (1998-01-01), Ohno
patent: 5745303 (1998-04-01), Ohno
patent: 5768030 (1998-06-01), Estelle et al.
patent: 5774279 (1998-06-01), Kiriki et al.
Ellis Betensky, "Zoom lenses for small CCD cameras", SPIE vol. 2539, pp. 2-10, Jun. 1995.
Eastman Kodak Company
Epps Georgia
Lester Evelyn A.
Short Svetlana Z.
LandOfFree
Variable focal length lens system having a divergent front lens does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Variable focal length lens system having a divergent front lens , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Variable focal length lens system having a divergent front lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-312128