Illumination device for producing a polarized light beam

Details Illumination device for producing a polarized light beam Illumination device for producing a polarized light beam

2007-04-03

2011-10-25

Payne, Sharon (Department: 2875)

Illumination

With polarizer

C362S296050

Reexamination Certificate

active

08042960

ABSTRACT:
An illumination device for providing a polarized light beam comprising a light source (101) having a light emitting surface arranged to emit light (107) in a plane (X-Y), a first polarizing reflector (103) arranged to enclose a light emitting surface of said light source (101) in said plane, and adapted to receive said light, reflect light (109) of a first elliptical polarization in a target direction (Z) and transmit light (111) of an opposite, second elliptical polarization; and a second reflector (105) arranged to enclose said first polarizing reflector (103) in said plane (X-Y), and adapted to receive transmitted light (111) from the first polarizing reflector (103) and reflect elliptical polarized light (113) in the target direction (Z). By arranging the two reflectors enclosing a side-emitting light source, a higher efficiency can be obtained with a preserved beam shape.

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patent: 1443264 (2004-08-01), None

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