Laboratory tests of the wavefront control experiment

ABSTRACTAn overview of the Wavefront Control Experiment (WCE) adaptive optics system ispresented. We discuss our initial tests of the system and illustrate adaptive correctioncapability of the system using its internal star source simulator. Future laboratory tests are planned prior to adapting the system to a coude feed of a 4 1 " reflecting telescope at Yerkes Observatory where atmospheric compensation with astronomical sources will be investigated.1. BACKGROUNDThe Wavefront Control Experiment is a space-qualified, high temporal bandwidth, compact adaptive optics package that was developed as a stand alone but integral component within the Strategic Defense Initiative Organization (SDIO) directed energy Starlab experiment. This experiment was to be conducted in near earth orbit using the Space Shuttle; the WCE was designed to operate in the zero gravity but shirtsleeve environment of the Spacelab module. The goal of the Starlab program was to exploreacquisition, tracking, and pointing capabilities in orbit within the context of the SDIOdirected energy mission. The exhaust plume of a Starbird booster rocket was to be acquired