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Proceedings Paper

Optical refractometer for complex refractive index measurement in UV-NIR range
Author(s): Jerzy Plucinski; Jukka A. Raety; Eino Keranen
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Paper Abstract

An optical system for measuring the spectrum of the complex refractive index of liquids in the UV-NIR range is described. The presented optical fiber measurement method allows remote control of the index. The developed refractometer has been tested with samples from different sections of paper mill and chemical pulp mill production processes. The obtained accuracy of the real part refractive index measurements was 10-5 with resolution 2 (DOT) 10-6 (for the wavelength in range 300 - 920 nm with spectral resolution better than 0.5 nm). The absorption corresponding to the imaginary part of the refractive index is measured in 0 divided by 20 dB/cm range with 0.01 dB/cm resolution.

Paper Details

Date Published: 30 April 1999
PDF: 4 pages
Proc. SPIE 3730, Optoelectronic and Electronic Sensors III, (30 April 1999); doi: 10.1117/12.346849
Show Author Affiliations
Jerzy Plucinski, Technical Univ. of Gdansk (Poland)
Jukka A. Raety, Univ. of Oulu (Finland)
Eino Keranen, Univ. of Oulu (Finland)


Published in SPIE Proceedings Vol. 3730:
Optoelectronic and Electronic Sensors III
Antoni Nowakowski; Bogdan Chachulski, Editor(s)

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