We present a new optical assembly with which to achieve Lau fringes with totally incoherent illumination. Gratinglike codification of the spatially incoherent source combined with an achromatic Fresnel diffraction setup allows us to achieve Lau fringe-pattern visibility of almost 100% with broadband light. The white-light character to our proposed setup is in stark contrast to previous monochromatic implementations. Potential implications of this fact are identified.
© 2004 Optical Society of America
(050.1950) Diffraction and gratings : Diffraction gratings
(050.1970) Diffraction and gratings : Diffractive optics
(070.4560) Fourier optics and signal processing : Data processing by optical means
(220.4830) Optical design and fabrication : Systems design
J. Lancis, G. Mínguez-Vega, E. Tajahuerce, V. Climent, P. Andrés, and Z. Jaroszewicz, "High-contrast white-light Lau fringes," Opt. Lett. 29, 150-152 (2004)