| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for manufacturing a polarization converting element that is excellent in heat resistance and light resistance, easily handled and excellent in work efficiency. SOLUTION: The polarization converting element 10 includes a retardation plate 3 which has a rectangular ring frame 3a and a grid comprising an aperture portion 3b and a retardation portion 3c thinner than the ring frame 3a surrounded by the ring frame 3a, the retardation plate 3 being formed by etching a planar quartz substrate having a 1/2λretardation function, and which is stuck to a light-exiting surface of a polarization separation element 2 with an adhesive 4 applied on the ring frame 3a, the polarization separation element 2 for separating incident light into two kinds of polarized light. COPYRIGHT: (C)2009,JPO&INPIT
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