TOPSFIELD, Mass., April 2, 2015 — A new Risley prism beam-steering assembly (RPA) is now available from Optra Inc. The RP-100 offers large-aperture (up to 4-in.) field-of-view steering of active and passive optical systems, including lasers and cameras, from the UV to the far-infrared. Optra’s RPA products offer a flat aperture in-line configuration featuring compact size, low power and wide steering angles. They are suited for free-space optical communications, lidar and ladar, and passive imaging from small platforms. Available in single wavelength or achromatic configurations, the device provides steering resolution and accuracy better than 100 μrad and 1 mrad, respectively, for fields up to 120° full-angle.