Measurement Of The Emissivity Of Small Particles At Elevated Temperatures

J. R. Fincke; C. L. Jeffery; R. Erik Spjut

doi:10.1117/12.7976741

1 August 1988 Measurement Of The Emissivity Of Small Particles At Elevated Temperatures

J. R. Fincke, C. L. Jeffery, R. Erik Spjut

Author Affiliations +

Optical Engineering, Vol. 27, Issue 8, 278684 (August 1988). https://doi.org/10.1117/12.7976741

Abstract

A technique for measuring the emissivity of single, nominally 50-µm-sized tungsten particles at elevated temperatures is demonstrated. Single particles are electrodynamically suspended in the cavity of a cw Nd:YAG laser and subsequently heated by the laser beam. The light emitted by the heated particles is focused onto the slit of a spectrometer. The detector used is an intensified gatable diode array that allows for the collection of time-resolved spectral data. Spectral radiance is deduced by calibrating the system against a standard lamp. Assuming that the relationship between emissivity and wavelength is a smooth function, the particle temperature and emissivity are determined by a curve-fitting procedure involving Planck's spectral radiation law. Experimental demonstration and error estimates of the technique are presented.

Citation Download Citation

J. R. Fincke, C. L. Jeffery, and R. Erik Spjut "Measurement Of The Emissivity Of Small Particles At Elevated Temperatures," Optical Engineering 27(8), 278684 (1 August 1988). https://doi.org/10.1117/12.7976741

Published: 1 August 1988

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