# title = "BL 450: 632 l/mm"
# type = grating
# gmm = 632 groves/mm
# blaze = 22.19 deg
# reflectance = 0.72
# eff1 = KPNO/Gratings/BL450.1        # First order measured efficiency
# eff2 = KPNO/Gratings/BL450.2        # Second order measured efficiency
