Waveguide laser illuminator incorporating a despeckler
First Claim
Patent Images
1. An illumination device comprising:
- a laser;
a waveguide comprising at least first and second transparent lamina;
a first grating device for coupling light from said laser into a TIR path in said waveguide;
a second grating device for coupling light from said TIR path out of said waveguide and towards a reflective microdisplay, wherein said second grating device is configured to transmit light reflected from said reflective microdisplay; and
a third grating device for applying a variation of at least one of beam deflection or phase retardation across wavefronts of light in said TIR path,wherein said first, second, and third grating devices are each sandwiched by said transparent lamina.
2 Assignments
0 Petitions
Accused Products
Abstract
There is provided an illumination device having: a laser; a waveguide including at least first and second transparent lamina; a first grating device for coupling light from the laser into a TIR path in the waveguide; a second grating device for coupling light from the TIR path out of the waveguide; and a third grating device for applying a variation of at least one of beam deflection, phase retardation or polarization rotation across the wavefronts of the TIR light. The first second and third grating devices are each sandwiched by transparent lamina.
1329 Citations
13 Claims
-
1. An illumination device comprising:
-
a laser; a waveguide comprising at least first and second transparent lamina; a first grating device for coupling light from said laser into a TIR path in said waveguide; a second grating device for coupling light from said TIR path out of said waveguide and towards a reflective microdisplay, wherein said second grating device is configured to transmit light reflected from said reflective microdisplay; and a third grating device for applying a variation of at least one of beam deflection or phase retardation across wavefronts of light in said TIR path, wherein said first, second, and third grating devices are each sandwiched by said transparent lamina. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. An illumination device comprising:
-
a laser; a waveguide comprising at least first and second transparent lamina; a first grating device comprising an array of selectively switchable grating elements, each of said grating element encode a beam deflector for coupling light from said laser into a TIR path in said waveguide and a lens having a Fourier plane in proximity to an illumination plane of said illumination device; and a second grating device for coupling light from said TIR path out of said waveguide and towards a reflective microdisplay, wherein said second grating device is configured to transmit light reflected from said reflective microdisplay; wherein said first and second grating devices are each sandwiched by said transparent lamina.
-
Specification