Development and Operation of a Hemi-Ellipsoidal Mirror Infrared Reflectometer from 2 to 34 micrometers
Final rept. 1 Jul 1973-30 Jun 1974
ARNOLD ENGINEERING DEVELOPMENT CENTER ARNOLD AFB TN
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The development and testing of an infrared hemi-ellipsoidal mirror reflectometer HEMR operational over a wavelength interval from 2 to 34 micrometers is described. This optical system measures the hemispherical- directional reflectance of room temperature samples relative to a specular, gold-coated surface. It is shown theoretically that for infinitesimal source and sample areas the HEMR measures the hemispherical-directional reflectance. Further, for a source and sample area commensurate with energy requirements, it is shown experimentally that the HEMR is functional, with very tolerable errors. Several associated problem areas investigated are described in detail. The hemispherical-directional reflectance of test samples e.g., black paints, gold diffuser, sulfur, cesium iodide, and others is presented for wavelengths from 2 to 34 micrometers.
- Test Facilities, Equipment and Methods