SpectralLED® RS-7 USER MANUAL
Page 26
3.3
Target Spectrum/Spectral Matching
The RS-7 can match any arbitrary spectrum by using a least-squares-fit algorithm to set the individual Channel
Power Levels (
1c
). The spectrum the RS-7 attempts to match is called the
Target Spectrum
.
When the Target Spectrum menu is clicked, the CIE 1931 x,y chromaticity chart (
1i
) disappears and is replaced by
the Target Spectrum pane (see Target Spectrum “Is Visible”
3b
), and the Target Spectrum is displayed in the
spectral plot window in blue (
3a
). Here we see the initial Target Spectrum as a flat line with all spectral data
points set to 1.0; this is the combination of the initial Base Target Spectrum of “none/Unity” (
3g
), multiplied by
the Target Spectrum Scale Factor (
3h
), multiplied by the Illuminant (
3i
). When no Illuminant is being applied,
“Select Illuminant” is displayed and the Illuminant itself has all spectral data points set to 1.0. Note that this is
exactly Illuminant E, and in fact there is a selectable Illuminant called “none/Illuminant E” which is the same
thing. In other words, “Select Illuminant” and “none/Illuminant E” are identical, as both represent unity at all
wavelengths.
3a. Target Spectrum Spectral Plot
The Target Spectrum is shown as a blue line, and is a combination of the currently loaded Base Target Spectrum
3b
3a
3g
3h
3i
3c
3d
3e
3f
3j
3k
3l
3m
3n
3o