Method and apparatus for positioning microfiche card

Details Method and apparatus for positioning microfiche card Method and apparatus for positioning microfiche card

1983-05-10

1985-10-29

Haroian, Harry N.

Optics: image projectors

Selective data retrieval

Plural picture rows on single microcard

G03B 2308

Patent

active

045497974

ABSTRACT:
A microfiche reader is provided with pulse motors which move a microfiche card in X and Y direction so as to position a required frame image on the microfiche card in an optical projection path. Using the symbol AF for the maximum number of frames recordable on the microfiche card, the symbol AS for the maximum number of pulse signals required to move the microfiche card from the datum position to the limit position, and the symbol PF for the location number of a required frame, the address number NS of a required frame can be calculated according to the equation

REFERENCES:
patent: 3885867 (1975-05-01), Nelson et al.
patent: 4033684 (1977-07-01), Toriumi et al.
patent: 4041457 (1977-08-01), Koch
patent: 4315322 (1982-02-01), Osaki et al.
patent: 4408287 (1983-10-01), Parisot et al.
patent: 4443858 (1984-04-01), Piaton

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