| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2011: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Research Abstract |
For lighting applications to keep appropriate circadian rhythms, we examined luminous environment conditions effective in circadian photoentrainment and vigilance during the daytime. It is indicated that spectral properties of circadian photoentrainment and vigilance are highly sensitive to optical radiation of short wavelength, and described as a bimodal sensitivity curve due to phototransduction of intrinsically photosensitive retinal ganglion cells and cones. This is different from previous research results that have shown unimodal action spectra. Careful lighting design is required in order to create the comfortable luminous environment with blue-enriched light.
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