| 摘要 |
A laser projector according to an embodiment of the present invention comprises: light sources having red (R) laser, green (G) laser and blue (B) laser; optical coupling unit for combining R, G, and B laser beams provided from the light sources; a speckle reduction unit connected by the optical coupling unit and an optical fiber and suppressing the speckle from R, G, B laser beams provided from light source. The speckle reduction unit can be suppressed such that a plurality of speckle pattern for the incident R, G, B laser beams are rapidly changed by the Brownian motion of molecules of colloidal medium, and the overlapping of a plurality of the speckle pattern are caused. According to the present invention, it is possible to reduce the optical loss such that the speckle reduction unit features in a simplified form for receiving the colloidal medium suppresses the speckle via phase modulation. In addition, the configuration of the apparatus is simple so that a slim apparatus can be provided. |
