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.