Risley Prism Beam Steering - 29Oct2008

OPTRA's family of Laser Beam Steering Products use compact Risley
Prism pairs for fast steering laser beams. Optimized closed loop
bandwidth allows for high-speed continuous spiral scanning for
point-to-point tracking and high-speed scanning. For more
information, see:
www.optra.com/p...

[@MikeJones-ny7yt]

Is this a three-prism Risley? Would love to know the drive algorithm.