Illumination – Elongated source light unit or support – With or including transparent or translucent member
Patent
1979-03-16
1981-04-14
Griffin, Donald A.
Illumination
Elongated source light unit or support
With or including transparent or translucent member
362225, 362311, 362333, F21V 502
Patent
active
042623260
ABSTRACT:
A lighting system for providing aesthetic and energy efficient lighting, for building interiors and exterior lighting, includes lighting fixtures including a high intensity discharge lamp and a novel lens. The lens is formed as a dropped square pyramid with four triangular lower panels and four generally vertical side walls. Prisms on the inner and outer faces of the lens produce a higher luminous intensity at an angle of about 30.degree. to 50.degree. than at nadir and project light at higher angles toward the corners of the lens than perpendicular to the sides of the lens, thereby producing a generally square, widespread light distribution pattern. The lens cuts off high angle light (with respect to nadir), thereby reducing glare.
REFERENCES:
patent: 2887568 (1959-05-01), Franck
patent: 3239661 (1966-03-01), Wince et al.
patent: 3259739 (1966-07-01), Guth
patent: 3502865 (1970-03-01), Matteson
patent: 3600569 (1971-08-01), Matteson
patent: 3647148 (1972-03-01), Wince
patent: 3681591 (1972-08-01), Loch
Holophane Brochure HL-297 "Holophane Multilume Modular 2'.times.2' HID Luminaires" Johns Manville Sales Corp. 4-76.
Griffin Donald A.
K-S-H, Inc.
Mathews Alan
LandOfFree
Lens for high intensity lamp fixtures does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lens for high intensity lamp fixtures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lens for high intensity lamp fixtures will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-161588