Optical: systems and elements – Holographic system or element – Using a hologram as an optical element
Patent
1997-09-11
1999-07-20
Henry, Jon
Optical: systems and elements
Holographic system or element
Using a hologram as an optical element
359599, 359636, 349 64, 349113, G02B 532, G02B 502, G02F 11335
Patent
active
059262931
ABSTRACT:
A light-diffusing holographic transflector comprising a holographic layer and a transflective layer is disclosed. The transflector is capable under good ambient lighting conditions of illuminating an LCD display element by holographic reflection, and under poor ambient lighting conditions, by the transmission therethrough of internal edge- or back-lighting. The transmission of light is accomplished to form a predetermined visually-perceptible image (e.g., graphics, designs, and logos) by the provision in said transflector of a corresponding pattern of light-transmitting microholes. The light-transmitting microholes are formed preferably by laser ablation or etching.
REFERENCES:
patent: 3599596 (1971-08-01), Remus et al.
patent: 4040727 (1977-08-01), Ketchpel
patent: 4355868 (1982-10-01), Perregaux et al.
patent: 4398805 (1983-08-01), Cole
patent: 4541692 (1985-09-01), Collins et al.
patent: 4630894 (1986-12-01), Cremers
patent: 5128779 (1992-07-01), Mallik
patent: 5418631 (1995-05-01), Tedesco
patent: 5471327 (1995-11-01), Tedesco et al.
patent: 5530571 (1996-06-01), Chen
patent: 5594560 (1997-01-01), Jelley et al.
patent: 5742411 (1998-04-01), Walters
J.M. Tedesco et al., "Holographic Diffusers for LCD Backlights and Projection Screens", SID International Symposium-Digest of Technical Papers, vol. 24, No. 1, May 1, 1993.
de Luna Renato M.
Henry Jon
Polaroid Corporation
LandOfFree
Holographic transflector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Holographic transflector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Holographic transflector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1327113