1974-02-04
1976-11-02
Rubin, David H.
350 8, 350 54, 350184, 350230, 354155, 354222, G02B 2304, G03B 1306
Patent
active
039893499
ABSTRACT:
A camera of the reflex type comprises a view finder with an achromatic finder objective, an eyepiece, and an interposed inverting lens group. The finder objective includes a negative-meniscus lens of relatively low Abbe number and a biconvex lens of relatively high Abbe number. The negative-meniscus lens, which has a concave forward surface, may be air-spaced from the biconvex lens or may be cemented thereto to form a doublet; in the latter instance the doublet is preceded by a positive, biconvex or planoconvex, front lens.
REFERENCES:
patent: 2850945 (1958-09-01), Kohler
patent: 3010367 (1961-11-01), Miles
patent: 3043181 (1962-07-01), Brown et al.
patent: 3045545 (1962-07-01), Korones et al.
patent: 3062102 (1962-11-01), Martin
patent: 3127809 (1964-04-01), Denk
patent: 3230851 (1966-01-01), Reymond
patent: 3722979 (1973-03-01), Mikami
patent: 3751136 (1973-08-01), Kirchhoff
Besenmatter Walter
Kurz Gunter
Muszumanski Trude
Dubno Herbert
Hauser Raimund
Montague Ernest G.
Ross Karl F.
Rubin David H.
LandOfFree
Reflex finder does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reflex finder, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reflex finder will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1155506