Phase imaging is used to compare near-field measurements with the corresponding far-field intensity distribution. A liquid-crystal device serves as a phase object that can be programmed as a variable grating. Real-time phase visualization then provides an avenue for direct optimization of complex phase gratings.
© 1996 Optical Society of America
L. J. Friedman, D. S. Hobbs, S. Lieberman, D. L. Corkum, H. Q. Nguyen, D. P. Resler, R. C. Sharp, and T. A. Dorschner, "Spatially resolved phase imaging of a programmable liquid-crystal grating," Appl. Opt. 35, 6236-6240 (1996)