HEMISPHERICAL REFLECTANCE OF METAL SURFACES AS A FUNCTION OF WAVELENGTH AND SURFACE ROUGHNESS

reportActive / Technical Report | Accession Number: AD0472767 | Open PDF

Abstract:

Measurements of the hemispherical reflectance of metallic surfaces with controlled surface roughness were made using a sulfur infrared integrating sphere and a Beckman DC2A spectrometer. The surfaces studied were ground glass and nickel coated with films of aluminum, gold, platinum, and nickel. The data indicate that beyond a certain ratio of surface roughness to incident wavelength, the normalized data for aluminum, gold, and platinum may be represented by a single curve. This was true for the unidirectional as well as the isotropic roughnesses, although the nickel data deviated from this curve. The causes for this deviation are believed to be associated with high surface stresses caused by changes in the crystalline structure and are discussed.

Author(s):
Birkebak, R. C. ; Dawson, J. P. ; Mccullough, B. A. ; Wood, B. E.
Author Organization(s):
ARO INC ARNOLD AFS TN
Descriptive Note:
Technical rept.
Supplementary Note:
Prepared in cooperation with ARO, Inc., Tullahoma, Tenn. DOI: 10.21236/AD0472767
Pagination:
0026

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release
Distribution Statement:
Approved For Public Release; Distribution Is Unlimited.

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
AEDC-TR-65-170
Contract/Grant Number(s):
AF 40(600)-1200
Task Number(s):
895104
Project Number(s):
AF8951, ARO SW2407
Monitor Series:
TR-65-170, AEDC
 Subject Terms
Joint Capability Areas:
JCA_5_Command and Control
Communities of Interest:
Space
Descriptor(s):
*METAL COATINGS, *REFLECTION, ALUMINUM, GOLD, HEMISPHERICAL SHELLS, INFRARED RADIATION, METAL FILMS, METALS, NICKEL, PLATINUM, STRESSES, SURFACE PROPERTIES
Field(s)/Group(s):
Coatings, Colorants and Finishes
Report Date:
1965 Oct 01