The active type revision element, the interchangeable type optical pickup and the optical recording which adopt that and/or the playback equipment

摘要

The active type revision element, the interchangeable type optical pickup and the optical recording which adopt that and/or the playback equipment is offered. To be located between the transparent baseplate of pair, and the transparent baseplate of pair at least incident light diffraction dying transmitting to the surface of one which it adjoins to physical layer and the physical layer where refractive index change is done actively by the voltage which is impressed transparent baseplate with the refractive index change of physical layer, or diffracting incident light and in order to change the emission angle of light, the hologram pattern which was formed and, the active type revision element which features that it has, adopting that you use the light of the same wave length, the interchangeable type which can adopt the information record medium where thickness differs interchangeablyThe optical pickup, and optical recording and/or it is the playback equipment.