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発光手段、及び前記発光手段からの出射光を受光する受光手段を備え、前記受光手段の受光光量の変化によりディスクの挿入を検出するディスク挿入検出手段と、前記発光手段又は前記受光手段が配置される配置手段と、を備え、A light emitting means and a light receiving means for receiving the light emitted from the light emitting means, a disk insertion detecting means for detecting insertion of a disk by a change in the amount of light received by the light receiving means; Arranging means, 前記配置手段は、挿入されるディスクにより移動し、前記受光手段への入射光量を変化させることを特徴とするディスク再生装置。The disk reproducing apparatus according to claim 1, wherein the disposing means is moved by a disk to be inserted to change the amount of incident light on the light receiving means.前記受光手段は、遮光スリットを有することを特徴とする請求項１記載のディスク再生装置。2. The disk reproducing apparatus according to claim 1, wherein the light receiving means has a light shielding slit.
JP2004022430A2004-01-302004-01-30
Disk unit
Expired - Fee RelatedJP4137804B2
(en)
Optical disc, method for manufacturing such optical disc, stamper, signal processing method, signal processor, image drawing method, optical disc recording device and optical recording medium
Objective optical element for optical pickup device, optical element for optical pickup device, objective optical element unit for optical pickup device and optical pickup device