Optical: systems and elements – Prism – With reflecting surface
Patent
1991-12-13
1993-09-21
Hayes, Monroe H.
Optical: systems and elements
Prism
With reflecting surface
354199, 359676, 359679, G03B 1310
Patent
active
052473244
ABSTRACT:
A compact real image zoom finder suitable for compact cameras, and the like whose zoom ratio is about 2. The zoom finder comprises: (a) an objective including four lens units having positive, negative, positive and negative refractive powers in order from an object side. The first and the fourth lens units are fixed and the second and the third lens units are moved to perform zooming; (b) a stationary field lens and; (c) a rotating assembly and an eyepiece combination.
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patent: 4725130 (1988-02-01), Ozawa
patent: 4805999 (1989-02-01), Ueda et al.
patent: 4854680 (1989-08-01), Kikuchi
patent: 4906078 (1990-03-01), Inabata et al.
patent: 5005955 (1991-04-01), Ohshita
patent: 5081480 (1992-01-01), Abe
patent: 5130845 (1992-07-01), Ruben
patent: 5136430 (1992-08-01), Hamanishi
patent: 5173727 (1992-12-01), Lewis
Eastman Kodak Company
Hayes Monroe H.
Short Svetlana Z.
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