Tests of an Ellipsoidal Mirror Reflectometer

Abstract

Apparatus was assembled to form a reflectometer based on an ellipsoidal mirror. The target is mounted with provision for flame heating and temperature sensing. Reflectance measurements in the near infrared were compared with those taken with a commercial instrument, a Beckman DK-2A. The result is a 16% disagreement which is attributed to sensitivity to the reflectance pattern from a unidirectionally scratched target. The reflectance data scatter is + or - 0.04 with the ellipsoidal mirror; the scatter is seven times less with the Beckman. An improved averaging sphere coating will be necessary for making reflectance measurements in the middle infrared. (Author)

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1975
Accession Number
ADA018781

Entities

People

  • Frank J. Allen
  • John D. Sullivan Jr.

Organizations

  • Ballistic Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Biomedical
  • Weapons Technologies

DTIC Thesaurus Topics

  • Ball Bearings
  • Construction
  • Cutting Tools
  • Detectors
  • Diffraction
  • Electromagnetic Radiation
  • Focal Planes
  • Helium Neon Lasers
  • Laser Beams
  • Lasers
  • Magnesium Compounds
  • Materials
  • Measurement
  • Metals
  • Military Research
  • Reflectance
  • Reflectometers

Fields of Study

  • Physics

Readers

  • Spectroscopy.