| 摘要 |
An optical head comprises a laser beam source, a photo-detector device for receiving a laser beam emitted from the laser beam source and reflected at a data recording medium, an optical system for sending the laser beam from the data recording medium to the photo-detector device, and a base member for fixing the photo-detector device and the optical system. The photo-detector device has a photo-detector element, a mount member on which the photo-detector element is mounted, a block for fixing one end of the mount member, a spring member for applying elastic force to the mount member, a screw member for moving the photo-detector element along one direction against elastic force of the spring member and fixing the element to an arbitrary position, and a hinge portion formed in the fixing end of the mount member.
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