Emissivity and reflectivity measurements of heated windows with a tunable laser

Edward F. Cross

doi:10.1117/12.188680

17 October 1994 Emissivity and reflectivity measurements of heated windows with a tunable laser

Edward F. Cross

Proceedings Volume 2269, Infrared Technology XX; (1994) https://doi.org/10.1117/12.188680
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

Window heating effects are an important factor in development of missile seeker systems. Of specific concern are increases in window emissivity and reflectance as aerodynamic heating rapidly increases the window surface temperature. This paper describes a proposed experimental technique to measure window emissivity and reflectance over a temperature range from ambient to 350 degree(s)C and at spectral wavelengths in the 2.5 to 5.0 micron range. For this novel test setup the laser beam impinges on the infrared window sample at the Brewster angle to eliminate reflection losses so that remaining losses in laser intensity can be attributed to window emissivity. The proposed test procedures and laboratory equipment required to obtain these measurements are described in detail.

Citation Download Citation

Edward F. Cross "Emissivity and reflectivity measurements of heated windows with a tunable laser", Proc. SPIE 2269, Infrared Technology XX, (17 October 1994); https://doi.org/10.1117/12.188680

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