The Optical Spectrum
Copyright 1973 ELECTRONICS
Compiled by the Editors of Electronics, A McGraw-Hill Publication
1. The spectral cutoff points shown for optical elements are the wavelengths
where response falls below approximately 50%.
2. Optical spectrum charts are conventionally plotted in terms of increasing
wavelength and decreasing frequency, unlike charts plotted for lower-frequency
portions of the electromagnetic spectrum.
3. The wavelenght scale of the upper chart is logarithmic, while that of
the expanded visible spectrum below it is linear.