| 摘要 |
PROBLEM TO BE SOLVED: To provide a high quality optical head by which the generation of coma aberration due to the tilt of an objective lens is suppressed. SOLUTION: The optical head A is provided with a lens holder 2 arranged at the position confronted with an optical recording medium D while having a through-hole 20 penetrated in the direction of thickness, a 1st lens 3A held by this lens holder 2, a 2nd lens 3B for converging a light beam transmitted through the 1st lens 3A while being arranged inside the through-hole 20 of the lens holder 2 so as to approach to the optical recording medium D than the 1st lens 3A, and coils 4 for generating the magnetic field, and it is furnished with a transparent substrate 1 whereon the coils 4 and a transparent insulation protecting film 5 covering the coils 4 are formed on one side 1a, and also the 2nd lens 3B is adhered on the surface 1b opposite to the one side 1a of this transparent substrate 1, and also the lens holder 2 and the transparent substrate 1 are laminatingly adhered each other. |
