Cryogenic tests of volume-phase holographic gratings: results at 100 K.
We present results from cryogenic tests of volume-phase holographic (VPH) gratings at approximately 100 K. The aims of these tests are to see whether the diffraction efficiency as a function of wavelength is significantly different at a low temperature from that at room temperature and to see how the performance of a VPH grating is affected by a number of thermal cycles. We have completed ten cycles between room temperature and 100 K and find no clear evidence that the diffraction efficiency changes with temperature or with a successive thermal cycle.
Tamura
Naoyuki
N
Centre for Advanced Instrumentation, Department of Physics, University of Durham, UK. naoyuki@naoj.org
Murray
Graham J
GJ
Luke
Peter
P
Blackburn
Colin
C
Robertson
David J
DJ
Dipper
Nigel A
NA
Sharples
Ray M
RM
Allington-Smith
Jeremy R
JR