| 摘要 |
PROBLEM TO BE SOLVED: To provide an image pickup device capable of positioning accurately and highly precisely an optical system including an optical element having a rotation-asymmetric surface shape. SOLUTION: This device is provided with an objective optical system including an optical element 4 having a rotationally asymmetric surface shape, a brightness diaphragm 17 having a rotation-asymmetric opening shape, a solid image pickup element 8, and holding means 1, 5 for holding them. Positioning means (noncircular part) 4a, 1a, 1b, 5a in a rotational direction with respect to an optical axis are provided in the solid image pickup element 8 and the holding means 1, 5, and the diaphragm 17 is vapor-deposited on a surface of the optical element 4.
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