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Proceedings Paper

Correction of refraction index based on adjacent pulse repetition interval lengths
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Paper Abstract

Correction of refraction index is important for length measurement. The two-color method has been widely used for correction. The wavelengths of lasers have been used as a ruler of that. Based on the analogy between the wavelength and the adjacent pulse repetition interval length (APRIL), in this paper we investigate the possibility of two-color method based on adjacent pulse repetition interval lengths. Since the wavelength-based two-color method can eliminate the inhomogeneous disturbance of effects caused by the phase refractive index, therefore the APRIL-based two-color method can eliminate the air turbulence of errors induced by the group refractive index. Our analysis will contribute to high-precision length measurement.

Paper Details

Date Published: 13 November 2014
PDF: 6 pages
Proc. SPIE 9276, Optical Metrology and Inspection for Industrial Applications III, 92761C (13 November 2014); doi: 10.1117/12.2069828
Show Author Affiliations
Dong Wei, Nagaoka Univ. of Technology (Japan)
Masato Aketagawa, Nagaoka Univ. of Technology (Japan)


Published in SPIE Proceedings Vol. 9276:
Optical Metrology and Inspection for Industrial Applications III
Sen Han; Toru Yoshizawa; Song Zhang, Editor(s)

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