PROVIDENCE, R.I., 24 Nov. 2006. Custom manufactured sapphire waveplates that are a durable and chemically resistant replacement for single-crystal quartz or mica in the visible and near IR are available from Meller Optics Inc. of Providence, R.I.
Meller sapphire low-order waveplates come in 1/2- and 1/4-wave configurations for changing the polarization state of a laser beam that transmits from 2.8 to 4.7 microns. Featuring Moh 9 hardness and chemical resistance, they are effective replacements for single-crystal quartz or mica waveplates in the visible and near IR wavelengths.
Available in 10- to 25.4-millimeter diameter sizes with AR-V coat at the desired wavelength, Meller Sapphire low order waveplates have a 60-to-40 scratch-dig surface finish. Tolerances are better than 300 at 0.632 microns, more than 400 at 1.06 microns, and more than 1000 at 2.94 microns.
For more information contact Meller Optics online at www.melleroptics.com.