发明名称 |
Optical image measuring apparatus |
摘要 |
An optical image measuring apparatus capable of effectively obtaining a direct current component of a heterodyne signal which is composed of background light of interference light is provided. The optical image measuring apparatus includes: an optical interference system in which a light beam from a light source is divided into signal light and reference light by a beam splitter, a frequency of the reference light is shifted by a frequency shifter, and the signal light propagating through an object to be measured and the reference light reflected on a mirror are superimposed on each other by the beam splitter to produce interference light; beam splitters for dividing the interference light into interference light beams; shutters serving as an intensity modulating unit for modulating intensities of the respective interference light beams at predetermined intervals; CCDs for receiving the respective interference light beams whose intensities are modulated and outputting electrical signals; and a signal processing portion serving as a calculating unit for calculating an intensity of the direct current component corresponding to the background light of the interference light based on the outputted electrical signals.
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申请公布号 |
US2005206906(A1) |
申请公布日期 |
2005.09.22 |
申请号 |
US20050073712 |
申请日期 |
2005.03.08 |
申请人 |
KABUSHIKI KAISHA TOPCON |
发明人 |
CHAN KINPUI;AKIBA MASAHIRO;FUKUMA YASUFUMI;OTSUKA HIROYUKI;TSUKADA HISASHI |
分类号 |
A61B10/00;G01B9/02;G01B11/24;G01J9/02;G01J9/04;G01N21/17;(IPC1-7):G01B9/02 |
主分类号 |
A61B10/00 |
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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