| 摘要 |
PROBLEM TO BE SOLVED: To provide the compound lens body which can be made small-sized and thin and has high precision and the optical pickup which is equipped with the compound lens body and can be made small-sized by uniting a lens, an aperture stop, and a flange part by using an aspherical surface shape body formed on the lens. SOLUTION: The aspherical surface shape part 5 made of an optical material is formed on the incidence surface 4c of a spherical glass lens 4a integrally with the spherical glass lens 4a. This aspherical surface shape part 5 consists of the aperture stop 5a, aberration compensating lens shape part 5b, and flange part 5c. The aperture stop 5a consists of a convex light diffusion part which emits incident light so that the light is diffused form the focus of the spherical glass lens 4a. Further, the flange part 5c is formed at the outer peripheral part of the spherical glass lens 4a. |
