from 190 nm to 7 µm and is suitable for applications throughout the ultraviolet, visible andinfrared regions. Germanium’s high index of refraction suits applications in the 3- to 12-µm region, and zinc selenide features high transmission from 1 to 16 µm. The uncoated prisms aresuitable for use with well-collimated lightsources. The calcium fluoride prisms are available in 12.7-, 25.4- and 38.1-mm sizes. Thegermanium and zinc selenide ones are suppliedin 12. 7 and 25. 4 mm.
to UV light at
tures. The <50-nm filler provides high abrasion
resistance and optical clarity, low shrinkage,
good physical strength and viscosity of 4000 cy-
cles per second. The tensile strength of the
cured epoxy is >4600 lb/sq in. (psi), and its
tensile modulus is >500,000 psi. The single-
component system requires no mixing, has a
low coefficient of thermal expansion and is a
good electrical insulator. Post curing at 90 to
125 °C for 30 min yields a glass transition tem-
perature of >120 °C.
The Hexapodfrom NewportCorp. is a six-axis micropositioning systemdriven by six actuators that accommodate therequirements ofparallel kinematic systems. The antifriction-coated sphericaljoint design provides high rigidity and load capacity. The XPS electronic controller masters thesynchronized transformations from Cartesianinput coordinates to the motion of the Hexapodkinematic members. It features instrument-grade input/output, hardware-based input triggers, event triggers, high-speed on-the-fly dataacquisition and fast transmission control proto-col/Internet protocol communication. It has afreely definable virtual pivot point that offersflexibility in relocating the pivot point and theentire coordinate system through advancedmotion algorithms.