title: Ultra-sensitive wavefront measurement using a Hartmann sensor.
abstract: We describe a Hartmann sensor with a sensitivity of lambda /15,500 at lambda= 820nm. We also demonstrate its application to the measurement of an ultra small change in wavefront and show that the result agrees with that expected to within lambda/3,300.
authors: Aidan F
authors: AF
authors: Brooks
authors: Thu-Lan
authors: TL
authors: Kelly
authors: Peter J
authors: PJ
authors: Veitch
authors: Jesper
authors: J
authors: Munch