Bottlenecks of the wavefront sensor based on the Talbot effect.
Physical constraints and peculiarities of the wavefront sensing technique, based on the Talbot effect, are discussed. The limitation on the curvature of the measurable wavefront is derived. The requirements to the Fourier spectrum of the periodic mask are formulated. Two kinds of masks are studied for their performance in the wavefront sensor. It is shown that the boundary part of the mask aperture does not contribute to the initial data for wavefront restoration. It is verified by experiment and computer simulation that the performance of the Talbot sensor, which meets established conditions, is similar to that of the Shack-Hartmann sensor.
Dmytro
D
Podanchuk
Andrey
A
Kovalenko
Vitalij
V
Kurashov
Myhaylo
M
Kotov
Andrey
A
Goloborodko
Volodymyr
V
Danko