| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that desired accuracy is not obtained because of influences of shrinkage of an adhesive in a conventional cemented optical element. SOLUTION: Provided is a cemented optical element 1 which includes: a first optical element 2 having a concave surface 4; a second optical element 5 having a convex surface 6 facing the concave surface 4; and an adhesive layer 8 for bonding the convex surface 6 to the concave surface 4. The concave surface 4 and the convex surface 6 are curved surfaces parallel to each other, with curvature centers C1, C2 thereof coinciding with each other on an optical axis A. Thereby, the cemented optical element 1 with high shape accuracy is obtained. COPYRIGHT: (C)2011,JPO&INPIT
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