Optics: image projectors – Structurally related projector and screen
Patent
1988-02-25
1989-03-07
Haroian, Harry N.
Optics: image projectors
Structurally related projector and screen
353120, 353119, 353 26R, G03B 2128
Patent
active
048100870
ABSTRACT:
A microfilm reader which has an optical system for magnifying and projecting an image recorded on a film contained a cassette onto a viewing screen mounted on a pivot shaft of a casing having a generally rectangular flattened box-like configuration of the microfilm reader for folding and unfolding movement comprises a cassette holder, a microfilm driving device for transporting the microfilm so as to place a frame of the microfilm of which an image is to be projected, a reflection mirror supported by the casing for sliding movement so as to be foldable in order to turn the projected image toward the viewing screen, a top cover mounted on and supported by the casing for folding and unfolding movement which is slidably engaged with a top end of the viewing screen so as to define a dark space behind the viewing screen in cooperation therewith when the viewing screen is unfolded and to cover and protect the viewing screen when the viewing screen is folded, and linking device interconnecting the viewing screen and the reflecting mirror so as to fold and unfold the reflecting mirror in cooperation with the viewing screen. The microfilm reader comprises a light shielding member comprising a plurality of light opaque blades which is unfolded in cooperation with the viewing screen so as to close a side opening defined by the casing, the viewing screen and the top cover when the viewing screen is unfolded in order to provide a dark space behind the viewing screen.
REFERENCES:
patent: 3920322 (1975-11-01), Peters
patent: 4629299 (1986-12-01), Okano
Fukuda Hiroshi
Kojima Shigeru
Ohgaki Koji
Saito Eichi
Tachibana Hajime
Fuji Photo Film Co. , Ltd.
Haroian Harry N.
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