Cryogenic refractometer for high accuracy measurements of the refractive index of materials

P. Spanò; A. Bianco; G. Toso; G. Pariani

doi:10.1117/12.826210

21 August 2009 Cryogenic refractometer for high accuracy measurements of the refractive index of materials

P. Spanò, A. Bianco, G. Toso, G. Pariani

Proceedings Volume 7425, Optical Materials and Structures Technologies IV; 742505 (2009) https://doi.org/10.1117/12.826210
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

A prototype for a compact and relatively simple system capable to measure the refraction index of glasses, between 0.4 to 1.7 micron, at room and cryogenic temperatures (T=100-300 K), with an absolute precision of few parts of 100'000 has been developed at INAF facilities in Merate. It is based onto the measurement of the deviation angle of monochromatic light passing through a prism sample placed in the cryogenic chamber. The precision of the measurements depends on many factors, in particular the angle measurement and the thermal stability. Different subsystems have been studied to keep all these parameters under accurate control. One of the main issues has been the trade-off between the simplicity of the set-up and the precision of the refractive index measurement.

Citation Download Citation

P. Spanò, A. Bianco, G. Toso, and G. Pariani "Cryogenic refractometer for high accuracy measurements of the refractive index of materials", Proc. SPIE 7425, Optical Materials and Structures Technologies IV, 742505 (21 August 2009); https://doi.org/10.1117/12.826210

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available