| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To control (modify) polarization states of light sources of a plurality of wavelengths with half wavelength plates without causing increase of the number of components such as use of a plurality of the half wavelength plates. <P>SOLUTION: Quartz crystal components 101-104 are constituted of quartz crystal plates, mutually arranged while principal planes are in parallel, optical axes are made to be in parallel to the principal planes, and they include respectively different optical axes. The quart crystal component 101, the quart crystal component 103, and the quartz crystal component 104 are constituted of quartz crystal plates of 0.17 mm of plate thickness. The quartz crystal component 102 is constituted of a quartz crystal plate of 0.255 mm of plate thickness. Their plate thicknesses have a relationship of the plate thickness of the quartz crystal component 101: the plate thickness of the quartz crystal component 102: the plate thickness of the quart crystal component 103: the plate thickness of the quartz crystal component 104=2:3:2:2, with 0.085 mm as a reference. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
