9781528525442 - A Laser-Source Integrating Sphere Reflectometer (Classic Reprint) de Kneissl, Gerhart J. (3 resultados)

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

PAP. Condición: New. New Book. Shipped from UK. Established seller since 2000.

Paperback. Condición: New. Print on Demand. This book describes the development and testing of a reflectometer for measuring the absolute spectral reflectance of materials at temperatures up to 2500°K. The reflectometer included (1) a helium-neon laser as the source, capable of operation at 0.6328µm, 1.15µm and 3.39µm, (2) a 35 cm diameter integrating sphere coated with sodium chloride, (3) a lead sulfide detector, and (4) a radio frequency generator for heating the specimen by induction. The integrating sphere could be evacuated, or operated under a slight positive pressure of purified helium. Reflectance measurements were possible on both electrically conducting and nonconducting materials. The error analysis showed that the measured absolute reflectances are in error by less than one percent. Preliminary data are presented for thoria, tungsten and graphite. Graphite was found to be stable in reflectance on heating to 2150°K in vacuum. Both thoria and tungsten were somewhat unstable in reflectance on heating in vacuum. The author provides an in-depth analysis of the relationship between reflectance and temperature, and the implications for determining high-temperature thermal radiation properties. This book will be of great value to researchers and engineers working in the fields of heat transfer, optics, and materials science. This book is a reproduction of an important historical work, digitally reconstructed using state-of-the-art technology to preserve the original format. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in the book. print-on-demand item.