Quick Guide
LED and Laser Light Sources
LED Models: 850 OWL, 1300 OWL, & DUAL OWL
LASER Models: 1310 OWL, 1550 OWL, & LASER OWL
Introduction
Congratulations on your purchase of the Extech LED or LASER light source. Light
sources emit light at a certain
wavelength in nanometers (nm), which is detected at the
other end of a fiber by a photo detector calibrated to the same wavelength. The center
wavelength of the light source is measured at the point of peak intensity. Light sources
emit a range of wavelengths, not just one. The difference between the lowest and the
highest frequency of light is called the spectral width. For practical purposes, spectral
width is measured at Full Width-Half Maximum (FWHM); the width (Full Width) is
measured at the point exactly halfway between zero power and peak power (Half
Maximum). Careful use of this source will provide years of reliable service.
