White-light-modified Talbot array illuminator with a variable density of light spots.
A flexible array illuminator, comprising only two conventional optical elements, with a variable density of bright white-light spots is presented. The key to our method is to obtain with a single diffractive lens an achromatic version of different fractional Talbot images, produced by free-space propagation, of the amplitude distribution at the back focal plane of a periodic refractive microlens array under a broadband point-source illumination. Some experimental results of our optical procedure are also shown.
Tajahuerce
E
E
Bonet
E
E
Andrés
P
P
Zapata-Rodríguez
C J
CJ
Climent
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V