Patent ID: 9152028
Filing Date: 2015-10-06
Classification: G03B

Abstract:
1. A laser projection device comprising: a substrate; three laser chips mounted on the substrate, each laser chip being a laser diode; a spectroscope arranged on laser beams paths of the laser chips, the spectroscope comprising a first group of splitters and a second group of splitters spaced from the first group of splitters, laser beams emitted from the laser chips being adjusted into the second group of splitters by the first group of splitters, and then, the laser beams adjusted into the second group of splitters being adjusted to be oriented toward the same direction and mixed together to obtain light of a predetermined color; wherein the laser chips comprise a blue laser chip, a red laser chip and a green laser chip; wherein the first group of splitters comprises a first blue splitter, a first red splitter and a first green splitter, the second group of splitters comprises a second blue splitter, a second red splitter and a second green splitter, the blue laser beams emitted from the blue laser chip are reflected into the second blue splitter by the first blue splitter, the red laser beams emitted from the red laser chip are reflected into the second red splitter by the first red splitter, and the green laser beams emitted from the green laser chip are reflected by the first green splitter; wherein the first blue splitter, the first red splitter and the first green splitter are parallel to and spaced from each other; wherein the second blue splitter is parallel to and aligned with the first blue splitter, the second red splitter is parallel to and aligned with the first red splitter, and the second green splitter is parallel to and aligned with the first green splitter; and wherein a space between two adjacent first splitters is S