发明专利
TWI246066B 品質測試裝置及方法、以及電腦及電腦可讀取的儲存媒體 QUALITY-TESTING APPARATUS AND METHOD, AND STORAGE MEDIUM CAPABLE OF BEING READ BY A COMPUTER
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基本信息:
- 专利标题： 品質測試裝置及方法、以及電腦及電腦可讀取的儲存媒體 QUALITY-TESTING APPARATUS AND METHOD, AND STORAGE MEDIUM CAPABLE OF BEING READ BY A COMPUTER
- 专利标题（英）：Quality-testing apparatus and method, and storage medium capable of being read by a computer
- 专利标题（中）：品质测试设备及方法、以及电脑及电脑可读取的存储媒体 QUALITY-TESTING APPARATUS AND METHOD, AND STORAGE MEDIUM CAPABLE OF BEING READ BY A COMPUTER
- 申请号：TW091125195 申请日：2002-10-25
- 公开(公告)号：TWI246066B 公开(公告)日：2005-12-21
- 发明人： 威爾赫森 烏耳夫 WILHELMSON, ULF
- 申请人： 語音器材公司 AUDIODEW AKTIEOLAG
- 申请人地址： 瑞典
- 专利权人： 語音器材公司 AUDIODEW AKTIEOLAG
- 当前专利权人： 語音器材公司 AUDIODEW AKTIEOLAG
- 当前专利权人地址： 瑞典
- 代理人： 吳宏山
- 主分类号： G11B
- IPC分类号： G11B
A quality-testing apparatus is disclosed for an optical disk of the type that stores optically readable information in the form of a spiral or annular pattern defining a plurality of essentially concentric tracks (3). The apparatus has a laser light source (21) and a drive mechanism (22), which projects a laser beam spot from the laser light source onto a surface of the optical disk and moves the projected laser beam spot radially over a portion of the disk surface across at least some of the tracks. A light detector (21) detects a reflection from the projected laser beam spot during its movement (54). The light detector produces a time variant measurement signal (HF) being associated with passages of the moving laser beam spot across respective tracks. A processing device (40) measures the signal amplitude of selected parts of the optical disk and provide an output comprising key parameters such as symmetry and relative signal strength for the annular pattern of pits and lands.