Optical waveguides – Noncyclindrical or nonplanar shaped waveguide
Patent
1995-02-09
1996-12-03
Lee, John D.
Optical waveguides
Noncyclindrical or nonplanar shaped waveguide
362 32, 385901, G02B 600
Patent
active
055816835
ABSTRACT:
A light diffusing apparatus, which may be used as an elongate visual indicator in telephone sets, video cassette recorders etc, provides very even illumination (i.e., evenly diffused light without any discernible bright spots) when illuminated by spot light from one or two light emitting diodes. The apparatus includes a light guide having a light path of sufficient length to disperse the spot light from the emitting diodes. The dispersed light from the light guide then passes through a light diffuser. The light output end of the light guide and the light input surface of the light diffuser have uniform texture surfaces to further diffuse the dispersed light. The light diffuser may include diffusing particles. Very even illumination without any discernible bright spots is provided.
REFERENCES:
patent: 4441783 (1984-04-01), Houghton et al.
patent: 4824194 (1989-04-01), Karasawa
patent: 4989933 (1991-02-01), Duguay et al.
patent: 5001609 (1991-03-01), Gardner et al.
patent: 5050946 (1991-09-01), Hathaway et al.
patent: 5059013 (1991-10-01), Jain
patent: 5303322 (1994-04-01), Winston et al.
patent: 5325271 (1994-06-01), Hutchisson
patent: 5363458 (1994-11-01), Pan et al.
patent: 5373571 (1994-12-01), Reid et al.
Bertignoll Friedrich
Koens Paul J.
Austin R. J.
Lee John D.
Northern Telecom Limited
LandOfFree
Light diffusing apparatus with U-shaped light guide does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light diffusing apparatus with U-shaped light guide, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light diffusing apparatus with U-shaped light guide will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-793310