Accession Number:

AD0254484

Title:

INVESTIGATION OF THERMAL IMAGING TECHNIQUES

Descriptive Note:

Corporate Author:

AVCO CORP WILMINGTON MA RESEARCH AND ADVANCED DEVELOPMENT DIV

Report Date:

1961-04-15

Pagination or Media Count:

1.0

Abstract:

Experiments and measurements which can be successfully performed in image furnaces are listed together with the necessary special instrumentation. The restrictions imposed by basic principles of image furnaces upon their operation are discussed and methods to overcome these restrictions are proposed. Sample holders were designed to heat the entire circumference of a specimen in vacuum or controlled atmosphere. The importance of artificial blackbody cavities in the measurement of radiant flux is discussed and a new shape for such cavities is proposed. A calorimeter with the proposed shape cavity was constructed and applied to flux measurements in a 60-inch solar furnace. The results of the measurements indicated good correlation between normal incidence solar radiation and concentrated good correlation between normal incidence solar radiation and concentrated flux at the focal area. The flux was also measured with a watercooled, fast response, fine resolution radiometer. MgO was used as the coating on the sensing disc of the radiometer and preliminary tests indicated good reproducibility and constant sensitivity of the instrument. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE