发明名称 |
APPARATUS AND METHOD FOR CONTACTLESS THICKNESS MEASUREMENT |
摘要 |
A contactless thickness measuring apparatus is provided which includes an terahertz transmitter configured to receive the first optical path signal from the coupler and to generate a terahertz continuous wave using the first optical signal and an applied bias; an optical delay line configured to delay the second optical path signal output from the coupler; and an terahertz receiver configured to receive the terahertz continuous wave penetrating a sample and to detect an optical current using the terahertz continuous wave and the second optical path signal delayed. A thickness of the sample is a value corresponding to the optical current which phase value becomes a constant regardless of a plurality of measurement frequencies. |
申请公布号 |
US2014061475(A1) |
申请公布日期 |
2014.03.06 |
申请号 |
US201313802198 |
申请日期 |
2013.03.13 |
申请人 |
INSTITUTE ELECTRONICS AND TELECOMMUNICATIONS RESEARCH;ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE |
发明人 |
RYU HAN-CHEOL;KIM NAMJE;HAN SANG-PIL;PARK KYUNG HYUN;KO HYUNSUNG;PARK JEONG WOO |
分类号 |
G01B11/06 |
主分类号 |
G01B11/06 |
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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