Accession Number:

ADA224829

Title:

Installation of Two Predispersing Systems on the Ellipsometer

Descriptive Note:

Quarterly rept. no. 4

Corporate Author:

ILLINOIS UNIV CHAMPAIGN

Personal Author(s):

Report Date:

1983-01-01

Pagination or Media Count:

2.0

Abstract:

This quarter has been devoted to the installation of two predispersing systems on the ellipsometer as well as to the elimination of systematic and random noise. Results a A grating predisperser has been installed which is also driven by the computer and reduces by 4 orders of magnitude the scattered light in the system thereby permitting greater accuracy in the higher photon energy range. b A prism predispersing system has been installed as well which allows us to eliminate higher orders and therefore spares us the need to use automatic filter positioning. c A systematic tracking of all random noise sources has allowed us to improve the signal to noise ratio by a factor of two thereby making it easier to carry out first, second and third numerical derivations of the experimental signal.

Subject Categories:

  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE