PROVIDENCE, R.I., June 4, 2010 — A line of ZnSe cylindrical lenses that are used to focus or expand CO2 laser beams for applications such as optical metrology, laser scanning, spectroscopy and laser diode systems is available from Laser Research Optics, a division of Meller Optics Inc. The lenses can be used to focus a laser beam into a thin line or expand the output of a laser diode into a symmetrical beam in one axis only. They are available in 25.4- and 50.8-mm-diameter sizes with ±0.012-mm center thickness, and they feature focal lengths from 127 to 762 mm with ±0.5% tolerance. Offered with antireflection coatings that typically provide 0.5% maximum reflectance per surface at 10.6 µm and normal area of interest, the lenses have a 60-40 scratch-dig surface finish and 1 fringe surface accuracy at 633 nm. Centration error on these ZnSe lenses is 5 arcmin maximum. They are priced according to configuration and quantity, and price quotations are available upon request.