| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical element having a plurality of lens elements formed on two front and rear faces respectively, in which arrangement positions of the lens elements are measured with a high precision. SOLUTION: A multiple lens member 1 being the optical element has: convex lens parts 1c and 1d having outer peripheries (outline parts) brought into contact with each other on an incidence-side plane part 1a; and convex lens parts 1n and 1p having outer peripheries (outline parts) brought into contact with each other on an exit-side plane part 1b, and also has: contact parts 1k and 1m and contact parts 1w and 1x, which are reference positions for shape measurement on the plane part 1a side and the plane part 1b side and in which outer peripheral parts (outline parts) of respective lens parts are brought into contact with each other. Diameters of lens parts 1n and 1p are made slightly larger than those of lens parts 1c and 1d. Since positions of contact parts 1w and 1x can be measured from the plane part 1a side, relative relations between positional shapes of lens parts 1c and 1d and lens parts 1n and 1p, can be obtained through contact parts 1k, 1m, 1w, and 1x. COPYRIGHT: (C)2008,JPO&INPIT |
