Optical system for the reading out stored information

Claim 2

An optical system for the reading-out of N stored information items comprising: a support carrying on one face a non-uniform transpArency layer representative of said N information items, holographic imaging means positioned for receiving luminous energy emerging from said support and for selectively projecting an enlarged image of any one of said information items upon illumination thereof by a source of monochromatic light; said imaging means comprising N holograms resulting from the interference of coherent point sources of light respectively positioned in the plane of said face and in the plane of said image.

Claim 3

An optical system as claimed in claim 1, wherein said image is a virtual image.

Claim 4

An optical system is claimed in claim 1, wherein said image is a real image.

Claim 5

An optical system as claimed in claim 1, further comprising monochromatic illuminating means associated with said support for selectively illuminating any one of said N information items.

Claim 6

An optical system for the reading-out of N stored information items comprising: a support carrying on one face a non uniform transparency layer representative of said N informations items, holographic imaging means positioned for receiving luminous energy emerging from said support and for selectively projecting an enlarged image of any one of said information items upon illumination thereof by a source of monochromatic light, and monochromatic illuminating means associated with said support for selectively illuminating any one of said N information items; said imaging means comprising N holograms resulting from the interference of coherent point sources of light respectively positioned in the plane of said face and in the plane of said image; said illuminating means comprising at least one electroluminescent diode and means for displacing said diode along said support.

Claim 7

An optical system for the reading-out of N stored information items comprising: a support carrying on one face a non uniform transparency layer representative of said N informations items, holographic imaging means positioned for receiving luminous energy emerging from said support and for selectively projecting an enlarged image of any one of said information items upon illumination thereof by a source of monochromatic light, and monochromatic illuminating means associated with said support for selectively illuminating any one of said N information items; said imaging means comprising N holograms resulting from the interference of coherent point sources of light respectively positioned in the plane of said face and in the plane of said image; said illuminating means comprising at least one electroluminescent diode and means for displacing said diode along said support.

Claim 8

An optical system for the reading-out of N stored information items comprising: a support carrying on one face a non uniform transparency layer representative of said N information items, holographic imaging means positioned for receiving luminous energy emerging from said support and for selectively projecting an enlarged image of any one of said information items upon illumination thereof by a source of monochromatic light, and monochromatic illuminating means associated with said support for selectively illuminating any one of said N information items; said imaging means comprising N holograms resulting from the interference of coherent point sources of light respectively positioned in the plane of said face and in the plane of said image; said illuminating means comprising a plurality of electroluminescent diodes arranged in rows and columns and switching means electrically coupled to said diodes for energizing any one of said diodes.

Claim 9

An optical system for the reading-out of N stored information items comprising: a support carrying on one face a non uniform transparency layer representative of said N information items, holographic imaging means positioned for receiving luminous energy emerging from said support and for selectively projecting an enlarged image of any one of said information items upon illumination thereof by a source of monochromatic light, and monochromatic illuminating means associated with said support for selectively illuminating any one of said N information items; said imaging means comprising N holograms resulting from the interference of coherent point sources of light respectively positioned in the plane of said face and in the plane of said image; said illuminating means comprising a plurality of electroluminescent diodes arranged in rows and columns and switching means electrically coupled to said diodes for energizing any one of said diodes.

Claim 10

An optical system as claimed in claim 6, further comprising photoelectric means positioned for receiving said enlarged image from said imaging means.

Claim 11

An optical system as claimed in claim 7, wherein said photoelectric means comprise a plurality of photodiodes arranged in rows and columns and further switching means electrically coupled to said diodes for delivering an electrical signal supplied by any one of said photodiodes.

Claim 12

An optical system as claimed in claim 6, wherein said information items comprise a plurality of characters arranged in rows and columns.

Claim 13

An optical system as claimed in claim 9, further comprising optical recording means positioned for receiving juxtaposed enlarged images of those characters respectively contained in said columns.

Claim 14

An optical system as claimed in claim 10, wherein said optical recording means comprise an exposure slit positioned for receiving said juxtaposed images, a photographic emulsion positioned behind said slit and transport means for displacing said emulsion transversely of said slit.

Claim 15

An optical system as claimed in claim 11, further comprising an image converter tube positioned between said imaging means and said photographic emulsion; said image converter tube having an input face positioned for receiving sAid juxtaposed images and an output face optically coupled to said photographic emulsion through lens means.