Facsimile and static presentation processing – Facsimile – Specific signal processing circuitry
Patent
1975-03-27
1977-05-03
Stern, Ronald J.
Facsimile and static presentation processing
Facsimile
Specific signal processing circuitry
1791003G, 1791003V, 340173LM, 350 35, 358128, G03H 130, H04N 586
Patent
active
040216063
ABSTRACT:
A hologram apparatus comprises a rotary plane with a plurality of holograms concentrically or spirally arranged thereon, a light emitting source, and at least one photodetector for reading out reconstructed images of the holograms. During rotation of the rotary plane, the optical path of a light beam from the light emitting source is controlled, whereby the reconstructed images from the respective holograms are focused on the photodetector in succession. Some or all of the holograms are substantially oblong, and the long side and the short side of each oblong extend radially about the axis of the rotary plane and substantially orthogonally to the radial direction respectively.
REFERENCES:
patent: 3610722 (1971-10-01), Bestenreiner et al.
patent: 3656827 (1972-04-01), Gamblin et al.
patent: 3716286 (1973-02-01), St. John et al.
patent: 3739093 (1973-06-01), Kanazawa et al.
patent: 3746783 (1973-07-01), Gerritsen et al.
patent: 3812496 (1974-05-01), Brooks
patent: 3842197 (1974-10-01), Broussaud et al.
Imagawa Fumio
Kataoka Keiji
Takeda Yasutsugu
Tatsuno Kimio
Tsunoda Yoshito
Hitachi , Ltd.
Stern Ronald J.
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