Achromatic flat-panel display

Optics: image projectors – Prism in light path

Reexamination Certificate

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Details

C353S069000, C385S901000, C359S443000

Reexamination Certificate

active

06883919

ABSTRACT:
An achromatic flat-panel projection display comprises a video projector2a, a condensing lens (26) and a tapered transparent slab spreading the image input from the projector over the area of th slab. To compensate for dispersion in the slab a dispersive prism is used at the input edge of the slab, whose dispersion cancels out the dispersion of the slab. The prism can be a separate part of simply a bevel in the input edge, i.e. the thick end of the slab.

REFERENCES:
patent: 5046805 (1991-09-01), Simon
patent: 5381502 (1995-01-01), Veligdan
patent: 5625736 (1997-04-01), Veligdan
patent: 5745266 (1998-04-01), Smith
patent: 6002826 (1999-12-01), Veligdan
patent: 6012816 (2000-01-01), Beiser
patent: 6222971 (2001-04-01), Veligdan et al.
patent: 6406150 (2002-06-01), Burstyn
patent: WO9815128 (1998-04-01), None

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