G - Physics – 02 – B
Patent
G - Physics
02
B
88/20
G02B 27/02 (2006.01) G02B 21/00 (2006.01) G03B 23/10 (2006.01)
Patent
CA 1089263
PORTABLE MICROFICHE READING INSTRUMENT Abstract of the Disclosure A relatively compact, inexpensive and portable viewer for reading photographic reductions, such as microfiche film cards, includes a cylindrical translucent diffuser tube which provides for entry of sufficient light under usual ambient con- ditions for viewing the film; a transparent cylindrical mounting tube axially centered within the diffuser tube; and a slide tube axially and longitudinally movable, by hand operation, within the transparent mounting tube. The slide tube forms an optical path comprising a rectangular opening in its wall near one of its ends which acts as a film gate, a reflecting mirror positioned in line with the wall opening, a magnification lens and an eyepiece lens. The film is inserted in the cylindrical gap formed between the diffuser tube and the mounting tube and the slide tube is moved so that the desired portion of the film may be viewed, enlarged and read.
313886
Allen John A.
The Government Of The United States As Represented By The Secret
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