Infrared Hartmann wavefront sensor

An infrared Hartmann-type wavefront sensor was assembled from a 32 X 32 lenslet array, fabricated by a binary-optic process on a germanium substrate, and a 128 X 128 pixel InSb detector, manufactured by Amber Engineering, Inc. The sensor was used to measure the wavefront of a hydrogen-fluoride laser beam from the TRW Alpha Verification Module.