Holograms impregnated with laser active material

In a hologram recording and reconstructing apparatus, wherein an object beam spatially modulated with object information and a reference beam are directed upon a prescribed portion of a hologram recording medium to form a hologram of said information thereon, said hologram being maintained by said hologram recording medium, and wherein a reconstructing beam is directed onto said medium to reconstruct an image of said information from said hologram, the improvement wherein at least said prescribed portion of said hologram recording medium is impregnated with a laser active material which is different from the material of which said hologram recording medium is made and wherein said apparatus includes means for directing an exciting light beam upon said hologram recording medium, said exciting light beam being capable of exciting said laser active material.

In a hologram recording and reconstructing apparatus wherein an object beam spatially modulated with object information and a reference beam are directed upon a prescribed portion of a hologram recording medium to form a hologram of said information thereon, said hologram being maintained by said hologram recording medium, and wherein a reconstructing beam is directed onto said medium to reconstruct an image of said information from said hologram, the improvement wherein at least said prescribed portion of said hologram recording medium is impregnated with a laser active material which is different from the material of which said hologram recording medium is made and has an optical resonator structure, the axial direction of which coincides with the direction of impingement of said reference beam upon said hologram recording medium, and further including means for directing an exciting beam as said reconstructing beam upon said hologram recording medium, for causing oscillation in said laser active material in the axial direction of said resonstor structure and thereby produce a reconstructed image of said information.

In a hologram recording and reproducing apparatus wherein an object beam spatially modulated with object information and a reference beam are directed upon a prescribed portion of a hologram recording medium to form a hologram of said information thereon, said hologram being maintained by said hologram recording medium, and wherein a reconstructing beam is directed onto said hologram recording medium to reconstruct an image of said information from said hologram, the improvement comprising

• laser active material, which is different from the material of which said hologram recording medium is made, impregnated in said halogram recording medium, for increasing the energy in the reconstructing beam emerging from said hologram recording medium, to thereby produce an amplified reconstructed image of said information.

In a method of recording a hologram, wherein an object beam spatially modulated with object information and a reference beam are directed upon a prescribed portion of a hologram recording medium to form a hologram of said information thereon, said hologram being maintained by said hologram recording medium, the improvement wherein the step of recording said hologram comprises disposing a hologram recording medium at least said prescribed portion of which is impregnated with laser active material, which is different from the material in which said hologram recording is made, in the path of said object and reference beams to thereby record a hologram within said laser active material.

In a method of recording a hologram and reconstructing an image therefrom, wherein an object beam spatially modulated with object information and a reference beam are directed upon a prescribed portion of a hologram recording medium to form a hologram of said information thereon, said hologram being maintained by said hologram recording medium, and a reconstructing beam is directed upon said hologram for reconstructing an image of said information, the improvement wherein the step of recording said hologram comprises disposing a hologram recording medium at least said prescribed portion of which is impregnated with a laser active material, which is different from the material of which said hologram recording medium is made, in the path of said object and reference beams to thereby record a hologram within said laser active material, and the step of reconstructing said image includes the step of directing an exciting beam upon said prescribed portion of said hologram recording medium to excite said laser active material upon which said reconstructing beam impinges, thereby providing an amplified beam containing the reconstructed image emerging from said hologram recording medium.

In a method of recording a hologram and reconstructing an image therefrom, wherein an object beam spatially modulated with object information and a reference beam are directed upon a prescribed portion of a hologram recording medium to form a hologram of said information thereon, said hologram being maintained by said hologram recording medium, and a reconstructing beam is directed upon said hologram for reconstructing an image of said information, the improvement wherein the step of recording said hologram comprises disposing a hologram recording medium in the path of said object and reference beams to record a hologram of said information in said prescribed portion of said hologram recording medium and then impregnating at least said prescribed portion of said hologram recording medium with laser active material, which is different from the material of which said hologram recording medium is made, and the step of reconstructing said image includes the step of directing an exciting beam upon said prescribed portion of said hologram recording medium to excite said laser active material upon which said reconstructing beam impinges, thereby providing an amplified beam containing the reconstructed image emerging from said hologram recording medium.