Abstract

In astronomical imaging, the errors in the wave-front slope are a significant cause of aberrations in the detected image. We investigate how the slope can be estimated optimally using an intensity measurement of the propagated wave front. We show that the optimal location for detection of wave-front tilt is the focal plane, and we quantify the error in using defocused images, such as would be obtained from a curvature sensor, for estimating the wave-front tilt. The effect of using broadband light is also quantified.

© 2002 Optical Society of America

Wave-front sensing from defocused images by use of wave-front slopes

Marcos A. van Dam and Richard G. Lane
Appl. Opt. 41(26) 5497-5502 (2002)

Wave-front slope estimation

Marcos A. van Dam and Richard G. Lane
J. Opt. Soc. Am. A 17(7) 1319-1324 (2000)

Wave-front sensing from subdivision of the focal plane with a lenslet array

Richard M. Clare and Richard G. Lane
J. Opt. Soc. Am. A 22(1) 117-125 (2005)

Large amplitude tip/tilt estimation by geometric diversity for multiple-aperture telescopes

S. Vievard, F. Cassaing, and L. M. Mugnier
J. Opt. Soc. Am. A 34(8) 1272-1284 (2017)

Tip–tilt compensation for astronomical imaging

Scot S. Olivier and Donald T. Gavel
J. Opt. Soc. Am. A 11(1) 368-378 (1994)