发明名称 |
Compatible optical pickup device using a single light source |
摘要 |
A compatible optical pickup device includes a single light source to emit a light having a wavelength longer than 650 nm, an objective lens having a near axis area, a ring type annular lens area, and a far axis area to focus the light to form light spots suitable for a first relatively thin optical disk and a second relatively thick optical disk to form a first light spot having an FWHM (full width at half maximum) of 0.72 mum or less for the first optical disk and a second light spot having an FWHM of 0.8 mum or more for the second optical disk, an optical path changer to change a proceeding path of incident light, and a photodetector to receive light reflected by the optical disk and having passed through the objective lens and the optical path changer and to detect an information signal and/or an error signal.
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申请公布号 |
US7116627(B2) |
申请公布日期 |
2006.10.03 |
申请号 |
US20010899501 |
申请日期 |
2001.07.06 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
YOO JANG-HOON;JUNG SEUNG-TAE;LEE HO-CHEOL;LEE JU-HYUNG;LEE CHUL-WOO;KIM YOUNG-IL;CHOI HYUN-SEOB;HONG SANG-BEOM |
分类号 |
G01J1/02;G11B7/00;G01J1/04;G02B3/02;G11B7/125;G11B7/135 |
主分类号 |
G01J1/02 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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