LUCI 1 and LUCI 2

Both instruments are almost identical. The efficiencies of the two detectors are for the observable wavelength regim nearly constant at about 83%. Both cryostats are equipped with an entrance window tilted by 15^o. It reflects the visible light to a wavefront sensor. Each window has a different coating with different cut-on wavelengths (See also Appendix E for the wavelength plots.):

Table 3: Cut-on wavelengths of the LUCI instruments

	LUCI 1	LUCI 2
50% cut on	882nm	955nm