| 摘要 |
An object of the invention is to provide a splitter, a light emitter, and an optical pickup apparatus which can realize a stable track servo. Because of the structure of an optical system including an objective lens ( 27 ) and a hologram pattern ( 25 ), even when the hologram pattern ( 25 ) is irradiated with a reflected light from one recording layer other than another recording layer in a focused state, first and second TES splitting portions ( 35, 36 ) are not irradiated with the reflected light from the one recording layer, but the reflected light is led to an axis vicinity portion ( 38 ) only. Accordingly, light reception by first and second TES light receiving portions ( 45, 46 ) is prevented, accurate track position information and deviation information can be positively acquired, and troubles such as the objective lens ( 27 ) being driven beyond a movable range can be eliminated.
|
