A scale-linearization method for precise laser interferometry.

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F00%3A12000005" target="_blank" >RIV/68081731:_____/00:12000005 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
A scale-linearization method for precise laser interferometry.
Original language description
The authors discuss an increase in the precision of a laser interferometer based on the phase division of the fringe using a single-frequency laser for a distance measurement in the subnanometre range. The resolution of the interferometer is extended byusing four paths of the laser beam across the measurement arm of the Michelson interferometer and by subsequent electronic division to the total resolution .lambda./2048. The technique fulfils the expectation that the influence of the fringe distortion caused by a phase difference of .pi./2 between two quadrature signals and the difference of the intensities will be lower. A further improvement of the linearity can be achieved by using a mathematical method which is based on the real-time measurement ofparameters of the detected interferometer fringe and an optimal approximantion of the quadrature signals obtained by using a conical section. The obtained parameters are transformed from the analytical form to the parametric form of the e
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BH - Optics, masers and lasers
OECD FORD branch
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Project
<a href="/en/project/GV101%2F97%2FK009" target="_blank" >GV101/97/K009: Scientific center of nanotechnologies and surface engineering</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2000
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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