| 摘要 |
PROBLEM TO BE SOLVED: To surely shield reflected light at a lens edge which is an unwanted light, and reflected light, diffused light or refracted light in a plane chamfered section at the outer side in the radial direction from the edge. SOLUTION: The edge generated at the boundary between the concave surface of a first lens included in a plurality of the lenses and a plane section on the outer side in the radial direction thereof, and the curved surface of the second lens adjacent thereto are brought into line contact, to determine the positions of the first lens and the second lens in their optical axis direction and a masking means extending at the external shape of the lens from the inner side in the radial direction, from the curved surface of the second lens with the first lens is arranged. The masking means is set as printing or painting. COPYRIGHT: (C)2005,JPO&NCIPI
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