Absolute optical thickness measurement of transparent plate using excess fraction method and wavelength-tuning Fizeau interferometer.
Opt Express
; 23(4): 4065-73, 2015 Feb 23.
Article
em En
| MEDLINE
| ID: mdl-25836445
ABSTRACT
The absolute optical thickness of a transparent plate 6-mm thick and 10 mm in diameter was measured by the excess fraction method and a wavelength-tuning Fizeau interferometer. The optical thickness, defined by the group refractive index at the central wavelength, was measured by wavelength scanning. The optical thickness deviation, defined by the ordinary refractive index, was measured using the phase-shifting technique. Two kinds of optical thicknesses, measured by discrete Fourier analysis and the phase-shifting technique, were synthesized to obtain the optical thickness with respect to the ordinary refractive index using Sellmeier equation and least-square fitting.
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Coleções:
01-internacional
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MEDLINE
Idioma:
En
Revista:
Opt Express
Ano de publicação:
2015
Tipo de documento:
Article