Image forming optical system and electronic instrument using...

Details Image forming optical system and electronic instrument using... Image forming optical system and electronic instrument using...

2006-06-13

2006-06-13

Harrington, Alicia M (Department: 2873)

Optical: systems and elements

Lens

Multiple component lenses

Reexamination Certificate

active

07061694

ABSTRACT:
An imaging optical system that includes, in order from an object side, a first lens having positive refracting power, a concave surface of which is directed toward the object side, a third lens having positive refracting power, a convex surface of which is directed toward an image side and a fourth lens having negative refracting power, wherein the second lens and the third lens are cemented together. Having such a configuration, an angle made by the incident light and the existing light to the cemented lens can be kept small, and accordingly, the generation of aberrations at the refracting surface and performance change of lenses when these are in a relative decentering position can be suppressed.

REFERENCES:
patent: 5272566 (1993-12-01), Aoki
patent: 5392431 (1995-02-01), Pfisterer
patent: 5434711 (1995-07-01), Tetsuya et al.
patent: 6560043 (2003-05-01), Saito et al.
patent: 6577451 (2003-06-01), Yamakawa
patent: 6584282 (2003-06-01), Saito
patent: 07-027974 (1995-01-01), None
patent: 11-052227 (1999-02-01), None
patent: 2001-133684 (1999-05-01), None

Affiliated with

Also associated with

Rating

Image forming optical system and electronic instrument using... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Image forming optical system and electronic instrument using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Image forming optical system and electronic instrument using... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3666432