| 摘要 |
PCT No. PCT/JP90/01197 Sec. 371 Date May 17, 1991 Sec. 102(e) Date May 17, 1991 PCT Filed Sep. 19, 1990 PCT Pub. No. WO91/04504 PCT Pub. Date Apr. 4, 1991.In a color filter or a monochromatic filter (4) to be used by bonding to imaging sensor (1), at least two resin layers (A) and (B) adjacent to each other on transparent substrate and having different refractive indices are furnished, and the boundary surface of these resin layers (A) and (B) is formed in such curved surface that incident light (7) is converged on each of the light receiving units (2) of imaging sensor. Therefore, light converging effect can be obtained even on a solid-state imaging device of bonding type, and the sensitivity can be increased. To prepare light converging curved surface from the boundary surface where two resin layers (A) and (B) contact each other, there is a method, by which the desired curved surface is formed by selective exposure and hardening of light curing resin, and there is another method, by which a convex graded element is formed at first, and the surface thereof is formed in the desired convex form on the above convex graded element by selecting the coating condition in coating resin on it.
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