# of air/glass 6 @ 0.98 = 0.886 (double input window + dichroic)
(assume AR coat for NIR)
Subtotal 0.761
IR-MOS (IR multi-object AO spectrograph) # of mirrors (Al) 4 @ 0.97 = 0.885 (object-selection mechanism)
# of mirrors (Au) 7 @ 0.985 = 0.900 (cryostat)
# of vacuum/glass 10 @ 0.988 = 0.886 (5 lenses, NIR coated)
Grating efficiency 1 @ 0.60 = 0.600
Filter efficiency 1 @ 0.90 = 0.900
Subtotal 0.381
IR array H-band QE 0.850 (2.5um cut-off HgCdTe)
Subtotal 0.324
Visible Imager # of mirrors (Al) 2 @ 0.97 = 0.941 (OAP relay)
# of air/glass 8 @ 0.98 = 0.851 (1 window + 1 filter + 2 ADC prism)
ADC glass/glass 2 @ 0.99 = 0.980
ADC absorption 1 @ 0.98 = 0.980
Filter efficiency 1 @ 0.95 = 0.950
Subtotal 0.730 CCD red QE 0.850 (deep depletion CCD) Subtotal 0.621 Summary Transmission thru Telescope & Relay 0.47
Total for IR-MOS (incl. QE) 0.15 (H-band science)
Total for Visible Imager (incl. QE) 0.29 (R-band science)
-- RichardDekany - 20 Apr 2006