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. Author manuscript; available in PMC: 2012 May 3.
Published in final edited form as: Chronobiol Int. 2011 Aug 25;28(8):673–680. doi: 10.3109/07420528.2011.602198

FIGURE 1.

FIGURE 1

Spectral response characteristics relevant to the present study. V(λ), shown with the dashed line, is the photopic luminous efficiency curve used in commercial photometry, closely mimicking the spectral sensitivity of the human fovea. The data points from Brainard et al. (2001) and from Thapan et al. (2001) represent the spectral sensitivity of the human circadian system to narrowband spectra measured in terms of their effectiveness to each suppress the synthesis of melatonin at night. The solid line represents the predictions from Rea et al. (2005) for the spectral sensitivity of the human circadian system to these narrow band spectra. The spectral sensitivity of the satellite PMT currently used in the DMSP-OLS (F16) and those data filtered with an astronomical V-band filter (Mermilliod et al., 2008) are shown as dot-dashed and dotted lines, respectively. The maximum value from all spectral response characteristics has been normalized to unity.