Holographic display apparatus

Details Holographic display apparatus Holographic display apparatus

1991-12-23

1994-07-26

Sikes, William L.

Optical: systems and elements

Holographic system or element

Using a hologram as an optical element

359 22, 359900, 340479, 362 801, G02B 532, G03H 128, B60Q 144

Patent

active

053330714

ABSTRACT:
A holographic display apparatus reconstructs an image by projecting a beam of a luminous source to a holographic sheet including a plurality of holograms. The holograms are arranged so that the central axes of images recorded in the holographic sheet are directed in a same direction, in the diverging direction, or in a converging direction. Additionally, each hologram has a first focal distance f1 (mm) and a second focal distance f2 (mm) which are in a relationship such that f1.ltoreq.f2/28+50 and f1<f2.

REFERENCES:
patent: 4720158 (1988-01-01), Kuwayama et al.
patent: 4892369 (1990-01-01), Moss
patent: 4916593 (1990-04-01), Moss et al.
patent: 4966426 (1990-10-01), Moss et al.
patent: 5101193 (1992-03-01), Smith et al.
patent: 5106174 (1992-04-01), Smith

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