Patent ID: 8414128

Claim:
An optical projection device, comprising: a laser engine, comprising an X-Prism, a second wave plate, a first polarized light generator, a second polarized light generator, and a third polarized light generator, wherein the first polarized light generator generates a fourth S polarized light to pass through the second wave plate to generate a fourth P polarized light, the second polarized light generator generates a fifth S polarized light, the third polarized light generator generates a sixth S polarized light, and the X-prism integrates the fourth P polarized light, the fifth S polarized light and the sixth S polarized light into light, wherein light comprises a first P polarized light, a first S polarized light, and a second S polarized light; a first wave plate, changing a light phase, wherein after light passes through the first wave plate, the first P polarized light is transformed to a third S polarized light, the first S polarized light is transformed to a second P polarized light, and the second S polarized light is transformed to a third P polarized light; and a lens, focusing light.