Optics: image projectors – Projector or screen removable from common housing – Plural reflectors between lamp and screen
Patent
1981-08-10
1983-04-12
Marcus, Stephen
Optics: image projectors
Projector or screen removable from common housing
Plural reflectors between lamp and screen
353 79, 353 27R, 353119, 40365, G03B 2130
Patent
active
043796281
ABSTRACT:
The film image is illuminated by the bulb or by ambient light admitted through an aperture on the top of the viewer. The image is projected on a folded light path onto a screen pivotally mounted on the underside of the upper housing to depend into the viewing chamber in the lower housing. The lower housing is pivotally connected to the upper housing and contains a power mirror reflecting the image on the screen into the eyes of the user. When the lower housing is folded (collapsed) over the upper housing the screen pivots into the space between the housings. The screen pivot is moveable to change the screen distance from the power mirror (and the film stage), to adjust the toe-in required of the viewers' eyes for optimism viewing comfort. The microfiche carrier mechanism is generally U-shaped to straddle the light path to the film stage and is positively driven back and forth relative to the housing film stage and engages the fiche on each side of the light path to move the fiche laterally.
REFERENCES:
patent: 2258382 (1941-10-01), Goebel
patent: 2484379 (1949-10-01), Goldberg
patent: 2495047 (1950-01-01), Afton et al.
patent: 3669534 (1972-06-01), Hoffman et al.
patent: 3893759 (1975-07-01), Crew
patent: 3899246 (1975-08-01), Edelstein
patent: 4234244 (1980-11-01), Klein
patent: 4294515 (1981-10-01), Kaufman
Marcus Stephen
Michael Bayard H.
Realist, Inc.
Sharp William R.
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