24 September 2015 V-block refractometer for monitoring the production of optical glasses
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Abstract
Highly chromatic corrected optical systems rely on optical glasses with precise optical positions represented by refractive index and Abbe number. A modern production of optical glasses requires an economical, fast and accurate way of monitoring its fabrication. We demonstrate that an automated Hilger-Chance type refractometer fulfills all these needs. Therefore the uncertainty of a set of optical glasses is analyzed on the basis of a high number and long time reproducibility measurements. It turns out that the standard deviations after several hundreds of measurements taken over almost an decade in refraction is better than 10-5 in refraction and 0.02% in dispersion.
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Uwe Petzold, Ralf Jedamzik, Peter Hartmann, Steffen Reichel, "V-block refractometer for monitoring the production of optical glasses", Proc. SPIE 9628, Optical Systems Design 2015: Optical Fabrication, Testing, and Metrology V, 962811 (24 September 2015); doi: 10.1117/12.2191218; http://dx.doi.org/10.1117/12.2191218
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KEYWORDS
Glasses

Refractive index

Mirrors

Neodymium

Refraction

Tolerancing

CCD cameras

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