"Easy Guide to Lasers"
Explanation of how lasers work, and the different types of lasers available
"Labrum Optical Engineering"
Custom lens and prism design; optical system design; high-speed photographic and video camera design for government and industry
"Optical Society of America"
OSA is a professional society of optical engineers and scientists devoted to advancing the fields of optics and photonics.
"Orion Telescope and Binocular Center"
Print and online catalog of telescopes binoculars, and accessories