| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical device capable of receiving an image in a wide area with less distortion. SOLUTION: The optical device 10 is provided with a lens 14, an image receiving surface 18 for receiving an optical image transmitted through the lens, a 1st reflection mirror 22 arranged around the lens by taking the optical axis 12 of the lens as a center, and a 2nd reflection mirror 26 for reflecting the light reflected by the 1st reflection mirror toward the lens, the reflection surfaces 24 and 28 of the 1st and 2nd reflection mirrors are formed so that the optical image enlargement ratio at the center part of the image receiving surface may become larger or smaller than the optical image enlargement ratio at the peripheral part of the image receiving surface. COPYRIGHT: (C)2003,JPO
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