Highly precise industrial distance measurements use mostly conventional laser interferometry techniques with He-Ne lasers as standard optical sources. There are two types of the most perspective semiconductor lasers to replace He-ne lasers.
Keywords
Laser Source Laser Interferometer Wavelength Tuning Laser Head Laser Interferometry
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Acknowledgement
The authors thanks for support to the Ministry of Education, Youth and Sports of the Czech Republic, projects no.: LC06007, 2C06012, ASCR, project no.: KAN311610701, Ministry of Industry and Commerce, projects no: 2A-1TP1/127, FT-TA3/133, 2A-3TP1/113 and GACR, projects no.: GA102/07/1179, GP102/09/P293, GP102/09/P630, GA102/09/1276.
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