Optical Glass Manufacturers:

Schott - Optical Glass

Ohara - Optical Glass

Schott - Fused Silica

Corning - Fused Silica

Heraeus - Fused Silica

Saint-Gobain - Fused Silica

Optical Cement Manufacturers:

Norland Products - Optical Adhesives

Optical Simulation Software:

Zemax - Optical Simulation Software

Ray Optics Simulation Application

Thin Film Center - Mcleod Coating Software

Viewer for OptoSigma Solid CAD Files:

IDA-STEP Viewer

Laser Information:

Sam's Laser FAQ

Laser - Wikipedia

Gaussian Beam - Wikipedia

Optical Resonator - Wikipedia

Photonics Organizations:

PhotonicsNL Association The Netherlands

SPIE

Optical Society of America

EPIC Association

Optics Information:

Sill Optics Technicon

Nature, Astronomy and Space:

Astronomy picture of the day

NASA

ESO

Sky & Telescope

Hubble Wallpapers

Aurora Photos

USET - Uccle Solar Equatorial Table

Global Map of Wind, Weather and Ocean Conditions