Compact folded mirror recorder and viewer of information

Details Compact folded mirror recorder and viewer of information Compact folded mirror recorder and viewer of information

1975-09-12

1977-11-29

Stephan, Steven L.

Optics: image projectors

Selective data retrieval

Plural picture rows on single microcard

353 37, 353 78, 353 99, G03B 2308, G03B 2128

Patent

active

040603172

ABSTRACT:
An optical projection apparatus employing lenses between 30 and 150 mils radius. The lenses are arrayed over a surface, near a photographic film which carries microimages. The microimages are projected through the lenses and against mirrors. The mirrors, termed folding mirrors, reduce the length of the projections in a direction along the optic axes of the lenses. The folding mirrors effectively reduce the throwing distance of the lenses thus reducing the thickness of the apparatus. The apparatus is also used to record.

REFERENCES:
patent: 2351618 (1944-06-01), Katz
patent: 3592542 (1971-07-01), Kaufer et al.
patent: 3765743 (1973-10-01), Reaves et al.
patent: 3864034 (1975-02-01), Yevick

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