| 摘要 |
PROBLEM TO BE SOLVED: To realize reduction of the number of parts, reduction in size and cost through introduction of an integrated structure of an optical pickup module. SOLUTION: At almost the center of a holder member 100, a lens hole 101 to which an objective lens 110 is engaged is provided and a laser element mounting means 102 to which a laser element 111 is fixed is also provided at one end of the holder member 100. Moreover, a beam splitter 113 is fixed to the objective lens 110 in the side opposed to an information recording medium. A light receiving element 114 is fixed to the position on the plate surface so that the laser beam emitted from the beam splitter 113 irradiates the holder member 100. The reflected beam from the objective lens 110 is reflected within the beam splitter 113 for several times to become the predetermined optical path length and is then received by the light receiving element 114. Therefore, the optical pickup module is integrally structured to reduce the number of parts and realize reduction in size and cost. |
