Accession Number:

ADA018781

Title:

Tests of an Ellipsoidal Mirror Reflectometer

Descriptive Note:

Memorandum rept.

Corporate Author:

ARMY BALLISTIC RESEARCH LAB ABERDEEN PROVING GROUND MD

Report Date:

1975-10-01

Pagination or Media Count:

64.0

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

Subject Categories:

  • Lasers and Masers
  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE