Thin Mirror Animation

This page animates the 3D surface of Davis' thin mirror it is rotated on the test stand in sixteen increments. At each position, five interferograms were taken and averaged. In this animation, the Zernike terms all the way through primary spherical were cancelled, thus any contributions due to actual spherical aberration or primary astigmatism on the glass is not represented. Nevetheless, it is clear that the raised ring is a feature on the glass, and that there is a trefoil pattern that mostly stays put that is probably a test stand artifact. The mirror was resting on an 18-point floatation cell angled back at 35 degrees. The box represents a height of 1/2 wave on the wavefront. P-V errors for the aberrations displayed are on the order of 1.1 waves on average.

Animation


Steve Koehler
26 January 2005
steve_koehler@securecomputing.com