| 摘要 |
PROBLEM TO BE SOLVED: To provide an illuminator, etc. capable of reducing the reduction of illumination efficiency due to the alignment of the polarization direction of illuminating light. SOLUTION: The illuminator has: a light source section 11R supplying light; a reflection type polarizing plate 15 as a polarizing and separating section separating the light from the light source section 11R into polarized light in a first vibration direction and polarized light in a second vibration direction approximately orthogonal to the first vibration direction; and aλ/2 phase plate 17 as a polarized light converting section converting the polarized light in the first vibration direction separated by the reflection type polarizing plate 15 into the polarized light in the second vibration direction. The illuminator allows the polarized light in the second vibration direction separated by the reflection type polarizing plate 15 to enter the first surface S1 of a spatial light modulator 21R as an object to be illuminated and allows the polarized light in the second vibration direction from theλ/2 phase plate 17 to enter the second surface S2 opposite to the first surface S1 of the spatial light modulator 21R. COPYRIGHT: (C)2007,JPO&INPIT
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