发明名称 |
Apparatus for detecting inclination of optical card. |
摘要 |
<p>There is provided an optical card inclination detecting apparatus (100) comprising: a card holder (2) supported to a guiding mechanism (12) so as to be reciprocated and having a card holding portion (21); an optical head (6) which has a tracking function for allowing the optical head to follow recording tracks on the optical card and performs at least either one of recording and reproduction of information onto/from the optical card; and a detector (104 SIMILAR 109) to detect an angle of inclination of the optical card held by the card holder to a moving direction of the card holder on the basis of an amount of change of a tracking signal which is used in the tracking operation of the optical head in at least a one-directional movement of the card holder supporting the optical card. A photo detector (121) to detect the reflected light from an optical card comprises two light receiving portions (121a, 121b) having the same special shape such as isosceles triangle or right-angled triangle. These light receiving portions are arranged so as to confront vertexes of the isosceles triangles or to confront oblique sides of the right-angled triangles. With this structure, the dynamic range of the track error signal can be set to a large value.</p> |
申请公布号 |
EP0300481(A2) |
申请公布日期 |
1989.01.25 |
申请号 |
EP19880111783 |
申请日期 |
1988.07.21 |
申请人 |
OMRON TATEISI ELECTRONICS CO. |
发明人 |
NITTO, KOUJI OMRON TATEISI ELECTRONICS CO.;KOSHIBA, YOSHIHITO OMRON TATEISI ELECTRONICS CO.;TSUBOI, KAZUO OMRON TATEISI ELECTRONICS CO.;TSUTSUI, KEIICHI OMRON TATEISI ELECTRONICS CO.;SOGO, KOJI OMRON TATEISI ELECTRONICS CO. |
分类号 |
G06K7/015;G11B7/0033;G11B7/09;G11B17/34;G11B19/10;G11B19/12 |
主分类号 |
G06K7/015 |
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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