In Figures 5-7, the dominant wavelengths
The form of regression function of this dependence is L* = exp(-[k.sub.L]d*[x.sub.L]), where [k.sub.L] is the luminance attenuation coefficient, which generally depends on LED colour (dominant wavelength
) and fog type, and [x.sub.L] is the fog layer thickness (2 m in this case).
That is, it has been habitual in the scientific-technological community to consider hue perception as strongly determined by dominant wavelength
(or chromatic angle.
In addition to its inherent value, this information makes obvious that the colourimetric specification of a basic category can not be made only in terms of dominant wavelength
, but must also include lightness and saturation.
The following parameters will be used to perform the colourimetric evaluation: dominant wavelength
([[lambda].sub.D]), purity (p), reflectance (R), CIEu'v' saturation, and CIEu'v' chroma.
The color bins are measured radiometrically by the dominant wavelength
The HSMF-C113 combines InGaN blue (470 nm dominant wavelength
, 60 mcd typical brightness); AlInGaP green (572 nm, 50 mcd); and AlInGaP red (626 nm, 80 mcd) die.
The TLMS3000 and TLMS3001 super red LEDs feature a dominant wavelength
of 630 nm and typical luminous intensities from 2.5 mcd to 12.5 mcd.
The IL integrating sphere and EPS Series spectroradiometer are capable of measuring total flux dominant wavelength
, chromaticity, color purity and photopic response in a controlled environment with NIST traceable results.
In this approach, the WDM interleaver (WDM IL) is used after the DAM to separate the generated dominant wavelengths
Recent advances in materials and manufacture have resulted in the commercial availability of light emitting diodes (LEDs) with narrow spectral distributions, high power, and dominant wavelengths
spanning the entire visible spectrum (2).
The displays -- with typical dominant wavelengths
of 631 nm and 589 nm, respectively feature typical luminosity of 6 mcd per segment at 10 mA for full visibility at distances up to 7 m.