Small rotating triple-reflection polariser for a UV discharge lamp

Abstract
A small triple-reflection-type polariser has been designed, whereby one component can be swung away enabling unpolarised light to be obtained without breaking vacuum. The polariser has the additional advantage that it can easily be attached to the frequently used DC glow discharge lamp. The test of the polariser by angle-resolved UV photoelectron spectroscopy on CO adsorbed on Ni (001) is discussed. The transmission of the polariser is found to be 10% with an estimated degree of polarisation of more than 80%.