X-ray microfilm reader

Details X-ray microfilm reader X-ray microfilm reader

1979-10-26

1981-07-07

Stephan, Steven L.

Optics: image projectors

Selective data retrieval

Plural picture rows on single microcard

350254, 353 55, 353 58, 353 77, G03B 2308, G03B 2110, G03B 2128

Patent

active

042771536

ABSTRACT:
An X-ray microfilm reader comprises a microfilm medium holder for holding same in a working position and a light source disposed below the working position which reflects light from a dichroic mirror towards the microfilm medium through a condenser. The image from the microfilm medium passes through any one of a plurality of projecting lenses and through a coner and is thereafter reflected by an image mirror onto a screen for viewing by the user.

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patent: 3183771 (1965-05-01), Rutkus
patent: 3507561 (1970-04-01), Esmay
patent: 3655279 (1972-04-01), Rathfelder
patent: 3836242 (1974-09-01), Kluver et al.
patent: 3871759 (1975-03-01), Crew
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patent: 3961846 (1976-06-01), Crew
patent: 4025177 (1977-05-01), Owens et al.
patent: 4067648 (1978-01-01), Spretzer
patent: 4140377 (1979-02-01), Hoadley
patent: 4165160 (1979-08-01), Persha et al.
patent: 4172657 (1979-10-01), Watanabe et al.

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