Patent · US Active

Patterned retarder and optical engine for laser projection apparatus

US9466941B2 · kind B2 · utility

2Cited by

15References

20Claims

0Family size

Inventors

Peter Janssens · Nazareth, BE
Koenraad Vermeirsch · Bellegem, BE

Key dates

Filing date	Mar 15, 2013
Grant date	Oct 11, 2016
Priority date	—
Expiry date	Oct 25, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04N13/363
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A patterned retarder is described that may be used with a laser source array to obtain a combined beam suitable for laser image projection (e.g., three-dimensional laser image projection using orthogonal polarization states and/or orthogonal color spaces). An effect of the retarder on a polarization state of an incident beam may be dependent on the location of the retarder upon which the beam is incident. In one example, a method of producing a laser beam from a plurality of component laser beams includes directing the plurality of component laser beams onto corresponding regions of such a patterned retarder having a plurality of pattern elements.

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