Compact optical viewer for microfiche or cassette

Details Compact optical viewer for microfiche or cassette Compact optical viewer for microfiche or cassette

G - Physics

03

B

88/73, 88/99

G03B 21/10 (2006.01) G03B 21/11 (2006.01)

Patent

CA 1103492

ABSTRACT A compact microfiche reader. Light from a microfiche or cassette microfilm is projected and under- goes several reflections prior to striking a viewing screen. One of the reflecting surfaces is defined by a prism sheet having a multiplicity of prisms. Light is both reflected by a passes through the prism sheet, the prism sheet thus defining a dual-function optical surface. This makes possible a more compact viewer. Several embodiments employ foldable reflecting surfaces and a foldable viewing screen to further reduce the size of the reader.

285443

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