Abstract

We have built a rotating-mirror beam splitter at grazing incidence which was used to measure directly (with minor corrections) the transmissivity of thin films in the 20–280 eV photon energy region. The intensity fluctuations usually encountered when using electron accelerators as light sources were efficiently eliminated. The same instrument could be used to measure differential transmissivities ΔT/ $\overline{T}$ with a sensitivity of a few tenths of a percent. In another arrangement a deflecting mirror which is incorporated as the photocathode into an open electron multiplier served as a very efficient beam monitor against intensity fluctuations.

© 1974 Optical Society of America

Adjustable Aperture Stop to Control the Divergence and Orientation of the Beam Emerging from a Vacuum Ultraviolet Monochromator

W. R. Hunter and R. K. Chaimson
Appl. Opt. 13(12) 2913-2918 (1974)

Extreme Ultraviolet Spectrometer for Space Research

Shailendra Kumar, Francesco Paresce, Stuart Bowyer, and Michael Lampton
Appl. Opt. 13(3) 575-580 (1974)

Measurement of Energy and Angular Distributions of Extreme Ultraviolet Photoelectrons

W. McMahon and L. Heroux
Appl. Opt. 13(2) 438-443 (1974)

Optical Grating Evaluator: a Device for Detailed Measurement of Diffraction Grating Efficiencies in the Vacuum Ultraviolet

D. J. Michels, T. L. Mikes, and W. R. Hunter
Appl. Opt. 13(5) 1223-1229 (1974)

Grazing-incidence Mirror System for Use with a Grating Spectrometer in the Extreme Ultraviolet

C. R. Negus
Appl. Opt. 13(5) 1216-1222 (1974)