Abstract： |
This invention relates to an optical head structure system using blue light laser including a laser, a collimator, a shaping prism, a polarization light splitting prism, a reflecting mirror, a 1/4 wave plate, an object lens, a disc plate, a single lens, a plane glass, a cylinder mirror, a signal detector, a signal collective, a laser power detector and a round diaphragm, in which, the character of the system includes: 1, the laser emits laser of the blue light wave band of P polarization laser, 2, the generated laser is processed by the collimator, the shaping prism and the round diaphragm to get round parallel beams with uniform distributed light strength, 3, the polarization light splitting prism splits the generated round parallel P polarization beams and small part is fed back to the power detector for constant power control while most of the parallel polarization lights pass through the 1/4 wave plate to become round ones to focus and collect sap signal data in the optical disc plate, 4, the 1/4 wave plate converts the round reflected by the surface sap of the disc plate to S light to be reflected to a signal detector by the polarization light splitting prism to read data. |
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