| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a laser light source device for effectively reducing speckle contrast without using a mechanical sliding part in particular. <P>SOLUTION: The laser light source device (100) has: a laser light source (110) for emitting laser light; a liquid crystal modulation element (120) for controlling a polarizing state of the laser light emitted from the laser light source (110); a polarizing beam splitter (130) for branching the laser light whose polarizing state is controlled by the liquid crystal modulation element (120) into P polarization (230) and S polarization (240) to have an optical path difference to be propagated so as to be composed thereafter; a first rectangular prism (140); and a second rectangular prism (150). The liquid crystal modulation element (120) controls the polarizing state of the laser light by electrically controlling at least one of birefringence and optical rotation for the laser light on each of a plurality of areas dividing an radiation range of the laser light emitted from the laser light source (110). <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
