| 摘要 |
PROBLEM TO BE SOLVED: To provide a longitudinal electric field type polarizing rotary element which has rectangularly sectioned electrooptical crystal, and can improve uniformity of an electric field distribution in a cross section of the electrooptical crystal when a high voltage is applied with a simple structure. SOLUTION: On flanks of large-sized optical crystal 1 except two surfaces perpendicular to an optical axis, an A electrode 2 and a B electrode 3 are formed. The A electrode 2 and B electrode 3 are formed so as to have a small electrode width on an end side of each flank and a large electrode width at the center part of the flank to enclose a circumference of the large-sized optical crystal 1. One of edges of the A electrode 2 and B electrode 3 is linear and the other is in a mountain shape such that the electrode width smoothly varies according to a curve or straight line, a fixed spacing being provided between the A electrode 2 and B electrode 3. COPYRIGHT: (C)2009,JPO&INPIT
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