Title:
【発明の名称】異なるLEDからの光を混合する照明器具
Document Type and Number:
Japanese Patent JP2003503825
Kind Code:
A
Abstract:
Apparatus for mixing light from discrete LED light sources utilizes beam splitters which each have a semi-reflective layer which partially transmits and partially reflects light of any wavelength incident thereon. Each semi-reflective layer is situated in a transparent prismatic black between reflective surfaces on parallel outside faces of the block so that two parallel input beams are mixed and transmitted as two parallel mixed beams of like color. For a square array of light sources, a first mixing stage consists of two such prismatic blocks arranged side-by-side, and a second mixing stage consists of two such prismatic blocks arranged side-by-side and rotated 90 degrees to the first stage. The second stage is arranged to receive a square array of mixed beams and produces four identical output beams. The colors of the light sources are chosen so that all output beams are white.
Inventors:
Michael Dee Pashley
Thomas M Marshall
Mattis Herkepel
Thomas M Marshall
Mattis Herkepel
Application Number:
JP2001507137A
Publication Date:
January 28, 2003
Filing Date:
June 21, 2000
Export Citation:
Assignee:
Konin Krekka Philips Electronics NV
International Classes:
G02B27/00; F21S8/04; F21V5/02; G02B27/14; F21Y101/02; (IPC1-7): F21S8/04; F21V5/02; G02B27/00
Domestic Patent References:
| JPH01143367A | 1989-06-05 |
Foreign References:
| US4071809A | 1978-01-31 | |||
| DE707614C | 1941-06-27 |
Attorney, Agent or Firm:
Sugimura Kosaku (1 person outside)