发明名称 |
Optical storage inspection unit calibration disk |
摘要 |
A calibration disk used for an optical disk inspection unit to correct the measurement values of the mechanical characteristics, such as plane deflection and eccentricity of optical disks, and comprising at least one of three correction sections: an axial displacement correction section, a radial displacement correction section, and a focus error output voltage correction section which are formed on one or both sides of the calibration disk, concentric to the center of rotation of the disk so that measurement values, such as the surface deflection, can be corrected automatically and accurately by simply setting the calibration disk on an inspection unit.
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申请公布号 |
US4988194(A) |
申请公布日期 |
1991.01.29 |
申请号 |
US19880210243 |
申请日期 |
1988.06.23 |
申请人 |
KYOCERA CORPORATION;NIPPON TELEGRAPH AND TELEPHONE CORPORATION;SHINDENSHIKOGYO CORPORATION |
发明人 |
HARA, SHIGEJI;YOSHIZAWA, TAKASHI;KINOSHITA, KANAE;SAKAMOTO, MASAHIKO;TERADA, MITSUHIRO;SUZUKI, YOUJI |
分类号 |
G01B7/24;G01B11/00;G01B11/30;G01M11/00;G01N21/93;G01N21/95;G11B7/0037;G11B7/24;G11B7/26 |
主分类号 |
G01B7/24 |
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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