1988-08-04
1990-08-07
Arnold, Bruce Y.
350431, 350451, G02B 308
Patent
active
049462520
ABSTRACT:
An improved focusing screen for a single-lens reflex camera or the like in which an unpleasant sensation caused by dark spots on the screen is eliminated. The inventive focusing screen includes a plurality of small lenses formed on the surface of the screen, each being a composite lens composed of a concave portion lens and a convex lens portion. The lenses may be disposed in such a way as to form a honeycomb pattern.
REFERENCES:
patent: 1922932 (1930-05-01), Delano
patent: 2275602 (1938-10-01), Beck et al.
patent: 2589014 (1952-03-01), McLeod
patent: 2605434 (1952-07-01), Homrighous
patent: 4703405 (1987-10-01), Lewin
patent: 4878737 (1989-11-01), Ise
"Applications of Micro Structured Optics in Single Lens Reflex Camera" by Takashi Suzuki, Susumu Matsumura, Kiyoshi Iizuka and Kiyonobu Endo, Optics 1981 vol. 10.
Arnold Bruce Y.
Asahi Kogaku Kogyo Kabushiki Kaisha
Callaghan Terry S.
LandOfFree
Focusing screen does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Focusing screen, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Focusing screen will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-955894