Photopic
curve is used to determine that all source spectral energy distribution
curve represented by the luminous flux (due to flux line in accordance
with internationally agreed human visual characteristics of the
evaluation of the radiation power). If the human eye of the same
wattage of 555 nm and 450 nm light of the feelings of the luminous flux
comparison, almost 25 times the former than the latter, was due to the
human eye is less sensitive to the wavelength of 450 nm which looks
darker. Corresponds to the photopic curve, light can not effectively
generate a spectrum red and blue regions of light, and this is the
second district as necessary for good color rendering, which is why
most of the light efficiency and color rendering can not take into
account the reason. For example, a large number of medium-wave
high-pressure sodium lamp produces light, while maintaining its high
optical efficiency of the circumstances, the color rendering of the
improvements is very limited. |
