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US 5,966,250 AGranted
Method and light collection system for producing uniform arc image size
AssigneePhilips Electronics North America Corporation
InventorJeffrey A. Shimizu
Life of this patent
Estimating the term…
Abstract
A structure and method for a collection system for a projector includes a collector for reflecting light and a correcting mechanism for receiving the reflected light. The collector and the correcting mechanism, in combination, correct the light and output a light beam having a uniform image size.
Claims13
A light projection system comprising
- a source of arc light,
- a reflector having an optical axis with a focal point on which said source is located, said reflector receiving light from said source at a collection angle relative to said optical axis and reflecting light from zones which are determined by said collection angle, and
- a correcting refractor positioned on said axis to directly receive light reflected from said zones,
- wherein said reflector and said correcting refractor are designed so that said correcting refractor directly outputs collimated light having a uniform size of arc image over all zones of said reflector.
1 more element
A light projection system comprising
- a non-spherical source of arc light,
- a reflector having an optical axis with a focal point on which said source is located, said reflector receiving light from said source at a collection angle relative to said optical axis and reflecting light from zones which are determined by said collection angle, and
- a correcting refractor positioned on said optical axis to directly receive light reflected from said zones,
- wherein said reflector and said correcting refractor are designed so that said correcting refractor directly outputs a uniform size of arc image over all zones of said reflector.
1 more element
Dependencies are inferred from the claim text.