Spie.org: SPIE: Conferences & Publications on Photonics, Optics, & Imaging
SPIE is an international society advancing an interdisciplinary approach to the science and application of light. Events cover a broad spectrum of technologies, many rich in optics, photonics and imaging.
Hamarlaser.com: Laser Alignment Machines, Calibration Tools, Systems & Equipment Hamar Laser
A worldwide leader in laser alignment & calibration technology for over 35 years, we design, manufacture, sell and service a wide range of systems, laser alignment tools and machines to satisfy virtually any application.
Astm.org: ASTM International - Standards Worldwide
ASTM International develops international standards for materials, products, systems and services used in construction, manufacturing and transportation. ASTM standard specifications and test methods define uniform requirements and procedures.