Patent ID: 8536503

Claim:
A gimbaled optical sensor system comprising: a multi-axis gimbal; a jitter sensing beam source configured to generate a jitter sensing beam that travels along a line of sight of the gimbaled optical sensor system; a jitter sensing beam detector; a 2:1 gain flat mirror mounted on an inner-most gimbal axis and configured to reflect the jitter sensing beam; and a faceted retro-mirror rigidly mounted on a second gimbal axis, positioned out of plane with the 2:1 gain flat mirror, and optically coupled to the 2:1 gain flat mirror, the faceted retro-mirror including a plurality of facets each tilted with respect to adjacent facets by an angular tilt, the faceted retro-mirror configured to reflect the jitter sensing beam to a field of view of the jitter sensing detector over a range of angular movement of the 2:1 gain flat mirror.