Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber

Ward Small IV; Peter M. Celliers; Luiz Barroca Da Silva; Dennis L. Matthews; Barbara A. Soltz

doi:10.1117/12.271014

18 April 1997 Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber

Ward Small IV, Peter M. Celliers, Luiz Barroca Da Silva, Dennis L. Matthews, Barbara A. Soltz

Proceedings Volume 2977, Specialty Fiber Optics for Biomedical and Industrial Applications; (1997) https://doi.org/10.1117/12.271014
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

A low-temperature fiber optic two-color infrared thermometer has been developed. Radiation from a target is collected via a single 700 micrometer-bore hollow glass optical fiber coated with a metallic/dielectric layer on the inner surface, simultaneously split into two paths and modulated by a gold-coated reflective chopper, and focused onto two thermoelectrically cooled mid-infrared HgCdZnTe photoconductors by 128.8 mm-radius gold-coated spherical mirrors. The photoconductors have spectral bandpasses of 2 - 6 micrometer and 2 - 12 micrometer, respectively. The modulated detector signals are recovered using lock-in amplification. The two signals are calibrated using a blackbody (emissivity equal to 1) of known temperature, and exponential fits are applied to the two resulting voltage versus temperature curves. Using the two calibration equations, a computer algorithm calculates the temperature and emissivity of a target in real time, taking into account reflection of the background radiation field from the target surface.

Citation Download Citation

Ward Small IV, Peter M. Celliers, Luiz Barroca Da Silva, Dennis L. Matthews, and Barbara A. Soltz "Two-color infrared thermometer for low-temperature measurement using a hollow glass optical fiber", Proc. SPIE 2977, Specialty Fiber Optics for Biomedical and Industrial Applications, (18 April 1997); https://doi.org/10.1117/12.271014

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