Optical system for image projectors
AssigneeDolby Laboratories Licensing Corporation
InventorsMartin J. Richards, Duane Scott Dewald, Nathan Wainwright, Barret Lippey
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Abstract
A projector system comprising a laser light source, a collimating lens, a fly-eye lens, an integrating rod and a first modulator is disclosed. The light from a laser light source/fiber illuminates a collimator to substantially collimate the light and then is transmitted through a fly's-eye lens. The fly's-eye lens provides a desired angular/spatial light distribution for further processing to a first modulator of the projector system.
Claims17
A laser launch module in a projection system, comprising:
- a collimating lens configured to collimate laser light;
- an integrating rod having an input facet;
- a focusing lens disposed between the collimating lens and the integrating rod and configured to focus the laser light onto the input facet of the integrating rod;
- and
- an optical homogenizing element disposed between the collimating lens and the integrating rod, the optical homogenizing element being configured to receive the laser light from the collimating lens and impose thereon an angular distribution before focusing of the laser light by the focusing lens.
A laser launch module in a projection system, comprising:
- an integrating rod;
- a collimating lens configured to collimate laser light to produce collimated laser light;
- an optical homogenizing element configured to impose an angular distribution on the collimated laser light to form diverging laser light having the angular distribution;
- and
- a focusing lens for focusing the diverging laser light, characterized by the angular distribution, to an input facet of the integrating rod.
A laser launch method, comprising:
- collimating laser light to form collimated laser light;
- using an optical homogenizing element, diverging the collimated laser light to form diverging laser light having an angular distribution;
- using a focusing lens, focusing the diverging light having the angular distribution to an input facet of an integrating rod;
- and
- transmitting light, focused to the input facet by the focusing lens, through the integrating rod.
Dependencies are inferred from the claim text.