We discuss the realization of highly efficient fan-out elements. Laser-beam writing lithography is available now for fabricating smooth surface relief microstructures. We develop several methods for optimizing microstructure profiles. Only a small number of parameters in the object plane are necessary for determining the kinoform. This simplifies the calculation of M × N arrays also for large M and N. Experimental results for a 9-beam fan-out element are presented.
© 1992 Optical Society of America
Original Manuscript: June 19, 1991
Published: September 10, 1992
D. Prongué, H. P. Herzig, R. Dändliker, and M. T. Gale, "Optimized kinoform structures for highly efficient fan-out elements," Appl. Opt. 31, 5706-5711 (1992)