| 摘要 |
PURPOSE:To adjust a position relation of a laser light source and a thin film waveguide by providing a guide plate between the thin film waveguide and its holder so that the waveguide can be brought to linear movement freely. CONSTITUTION:A thin film waveguide substrate 8 of an optical pickup is held by a holder 1 through guide plates 11, 12. These guide plates 11, 12 can be brought to linear movement freely against the holder 1 along a projecting part 1b, etc., of the holder 1 and its movement is brought to feedback control through a piezo-element, etc. In such a way, a position adjustment of a semiconductor laser chip 4 fixed to a T-type mount 2, and an optical waveguide of the substrate 8 provided with an optical collimation use geodesic lens 9, a comb line electrode 10 for generating a surface acoustic wave for polarizing a collimated light, etc., is executed easily and surely. |
