Assembling method and an optical pickup apparatus for an optical pickup device
2005
The first objective lens OBJ1 is an image height priority design have been made with respect to the light flux from the first semiconductor laser LD1, the second objective lens OBJ2, the light flux from the second semiconductor laser LD2 and the third semiconductor laser LD3 have been made the image height priority designed for, thus each of the objective lens, when suppressing coma aberration within a predetermined value, the coma adjustment sensitivity is low with respect to the inclination of the incident light beam due to the shift of the semiconductor laser. On the other hand, since the frame adjustment sensitivity to the tilt of the objective lens is high, by adjusting the tilt of the objective lens precisely, on the information recording surface of the optical information recording medium with a light beam from any light source it can be suppressed coma in the focused spot, thereby to perform recording and / or reproducing of appropriate information.
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