lightResponsivitySpectra: compute standard light responsivity spectra

In colorSpec: Color Calculations with Emphasis on Spectral Data

compute standard light responsivity spectra

Description

Some action spectra standards are defined by simple equations; the erythemal spectrum for human sunburn is one of them.

Usage

erythemalSpectrum( wavelength=250:400 )

Arguments

wavelength

a vector of wavelengths, in nm

Details

This erythemal spectrum is defined in 4 pieces: \lambda \le 298, 298 \le \lambda \le 328, 328 \le \lambda \le 400, and 400 < \lambda. The unit is nm. The spectrum is used in the definition of the international standard UV Index.

Value

For erythemalSpectrum()
A colorSpec object with quantity equal to 'energy->action'. The responsivity is 0 for \lambda > 400 nm, so this putting this spectrum in the category of human vision is a bit of a stretch.

Source

https://en.wikipedia.org/wiki/Ultraviolet_index

References

McKinlay, A.F., and B.L. Diffey. A reference action spectrum for ultraviolet induced erythema in human skin. CIE Res. Note, 6(1), 17-22. (1987)

See Also

daylight, quantity, materialSpectra, lightSpectra

colorSpec documentation built on June 10, 2025, 5:11 p.m.