Patent · US Expired

Illumination device

US5323302A · kind A · utility

15Cited by

2References

9Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Johannes-Gerhard Bertling · Lambach, DE
Doris Boebel · Stuttgart, DE
Peter Schoettle · Stuttgart, DE

Key dates

Filing date	Feb 26, 1993
Grant date	Jun 21, 1994
Priority date	—
Expiry date	Feb 26, 2013

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF21S41/28
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

An illumination device comprises a light source, a reflector which reflects light emitted by the light source, a light disc, and a plurality of optically active elements arranged in a path of rays of the light reflected by the reflector for at least one of dispersing and deviating of the light, the optically active elements being formed as diffraction-optical elements and together forming a diffraction grating which is formed as a member which is separate from the light disc.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.