Optical: systems and elements – Lens – Multiple component lenses
Reexamination Certificate
2008-12-10
2009-12-29
Choi, William C (Department: 2873)
Optical: systems and elements
Lens
Multiple component lenses
C359S781000
Reexamination Certificate
active
07639433
ABSTRACT:
A fixed-focus lens including a first lens, a second lens, a cemented lens, an aperture stop, and a fifth lens is provided. The first lens disposed between an object side and an image side has a negative refractive power. The second lens disposed between the first lens and the image side has a positive refractive power. The cemented lens is disposed between the second lens and the image side. The cemented lens consists of a third lens and a fourth lens arranged in sequence from the object side to the image side. One of the third lens and the fourth lens has a positive refractive power, and the other has a negative refractive power. The aperture stop is disposed between the fourth lens and the image side. The fifth lens disposed between the aperture stop and the image side has a positive refractive power.
REFERENCES:
patent: 5153779 (1992-10-01), Ohashi
patent: 5499142 (1996-03-01), Ohshita
patent: 5706141 (1998-01-01), Abe
patent: 5724191 (1998-03-01), Kouthoofd
patent: 5933286 (1999-08-01), Yamada et al.
patent: 6057971 (2000-05-01), Mihara
patent: 6222685 (2001-04-01), Yamada
patent: 6229962 (2001-05-01), Imamura
patent: 6633436 (2003-10-01), Wada et al.
patent: 7095569 (2006-08-01), Rege et al.
Chen Hsin-Te
Wang Kuo-Chuan
Choi William C
J.C. Patents
Young Optics Inc.
LandOfFree
Fixed-focus 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 Fixed-focus lens, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Fixed-focus lens will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4147525