Patent EP0364228A2 successfully refreshed from Google Patents.
EP0364228A2
Expired / Lapsed
EP
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Light fixture
Assignee: 3M Co
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Filing: 1989-10-11
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Granted: —
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Expires: 2009-10-11
Abstract
Abstract A light fixture has a source (16) of partially collimated light for emitting light having an axis of collimation. A structured surface (22') has a plurality of prisms that are rendered reflective for reflecting light from the light source out of the cavity. The peaks (24) of the prisms define a surface at least a portion of which makes an acute angle with the axis of collimation.
Inventors
- 👤 Jeffrey J. C/O Minnesota Mining And Melby
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-25 21:34
CPC Classifications
F; F21; F21V; F21V7/00; F21Y; F21Y2103/00; F21Y2115/00; F21Y2115/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
112 words
A light fixture comprising: a housing defining an optical cavity having an optical window, said housing having a inner surface on a side opposite said optical window; light emitting means in said housing for emitting a partially collimated beam of light having an axis of collimation; a plurality of prisms on said inner surface, each of said prisms having a specularly reflective surface on a side adjacent said light emitting means for reflecting light from said light emitting means out of said optical cavity through said optical window, the peaks of said prisms defining a surface, at least a portion of said surface forming an acute angle with said axis of collimation.
Claim 2
Dependent Claim
112 words
A light fixture comprising: a housing defining an optical cavity having an optical window, said housing having a inner surface on a side opposite said optical window; light emitting means in said housing for emitting a partially collimated beam of light having an axis of collimation; a plurality of prisms on said inner surface, each of said prisms having a specularly reflective surface on a side adjacent said light emitting means for reflecting light from said light emitting means out of said optical cavity through said optical window, the peaks of said prisms defining a surface, at least a portion of said surface forming an acute angle with said axis of collimation.
Claim 3
Dependent Claim
16 words
The light fixture of Claim 1 wherein said surface defined by said peaks is smoothly curving.
Claim 4
Dependent Claim
16 words
The light fixture of Claim 1 further comprising a light transmitting member in said optical window.
Claim 5
Dependent Claim
26 words
The light fixture of Claim 3 wherein said prisms reflect light from said light emitting means in a direction substantially perpendicular to said light transmitting member.
Claim 6
Dependent Claim
26 words
The light fixture of Claim 4 wherein each of said specularly reflective surfaces makes an angle substantially equal to forty-five degrees with said axis of collimation.
Claim 7
Dependent Claim
12 words
The light fixture of Claim 1 wherein said prisms are linear prisms.
References Cited (Backward Citations)
No citation records indexed.
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