Microfiche inspection apparatus

Details Microfiche inspection apparatus Microfiche inspection apparatus

1976-09-23

1978-10-10

Haroian, Harry N.

Optics: image projectors

Selective data retrieval

Film strip

353101, 353 76, G03B 2122

Patent

active

041193725

ABSTRACT:
A microfiche viewer structured for examining new microfiche film. The film is typically still in roll form as it comes from the microfiche camera. Plural magnifications of the microfiche image are selectively available; one, to reproduce a whole fiche upon the viewing screen for general observation of photographic quality, the other, to reproduce perhaps four frames of a whole microfiche for detailed observation of quality. The apparatus is structured for convenience in viewing. The different magnifications are obtained by selectively interposing objective lenses of different focal length in the light path adjacent to the microfiche film on the side opposite to that occupied by a light source. Motor driven film transport means are provided atop the apparatus proper.

REFERENCES:
patent: 2313639 (1943-03-01), Hauser
patent: 2344263 (1944-03-01), Perkins
patent: 2878718 (1959-03-01), Post
patent: 3604793 (1971-09-01), Wangerin et al.
patent: 3809460 (1974-05-01), Lettan
patent: 3888576 (1975-06-01), Bolgar et al.
patent: 3926513 (1975-12-01), Silver

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