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US 3,944,350 AGranted
Microfiche and reader
AssigneePersonal Communications, Inc.
InventorGeorge J. Yevick
Life of this patent
Estimating the term…
Abstract
A microfiche having one surface embossed or molded to define a multiplicity of small lenses (lensettes) integral with the microfiche. Each micro-image is stored directly below a corresponding lensette, thereby assuring optical distance registry between each micro-image and its projection. Lateral optical registry is also realized. In an embodiment, interlensette surface of the microfiche is made opaque to preclude optical cross-talk.
Claims7
A microfiche reader for projecting and viewing micro optic information, including,
- a. a viewing screen,
- b. an apertured mask spaced from said screen and parallel thereto,
- c. means for supporting a microfiche having optically active elements, said microfiche being parallel to said viewing screen and spaced therefrom,
- d. means to illuminate said microfiche and project micro images thereon through said mask apertures and thence onto said viewing screen,
- e. means for preventing overlapping of projected micro images on said screen, said means defined by opaque septa positioned between said screen and said apertured mask.
2 more elements
A microfiche reader including,
- a. a viewing screen,
- b. a support for a microfiche, said support being generally parallel to said viewing screen,
- c. means to illuminate a microfiche placed on said support, said means defined by a matrix of light sources coupled to enable predetermined sub-sets thereof to be energized,
- d. said light sources defined by light emitting diodes, said diodes having switching circuits to enable predetermined sub-sets only of said diodes to be energized, thereby permitting selected information sets carried by a microfiche to be projected to a viewing screen,
- e. means for preventing overlapping of projected micro images on said screen, said means defined by opaque septa positioned between said screen and said microfiche support.
2 more elements
Dependencies are inferred from the claim text.