CPC Subgroup Additional Only
G01J 2009/0234 Full Title
Measuring optical phase difference (devices or arrangements for controlling the phase of light beams G02F1/01); Determining degree of coherence; Measuring optical wavelength (spectrometry G01J3/00) > by interferometric methods (using interferometers for measuring optically the linear dimensions of objects G01B9/02)
1 direct subcode
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