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.
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
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