A cosine-approximated binary Gabor zone plate is proposed. The zone plate is fabricated by standard photographic techniques. It was evaluated by simulation and by experiment to match the focusing behavior of an ideal Gabor zone plate, but it has a focusing efficiency at least 23% higher than that of a binary Gabor zone plate. Duplication of an alphabetic character to form a 4 × 4 array of images with little astigmatism by the proposed zone-plate array is demonstrated.
© 1994 Optical Society of America
Original Manuscript: February 9, 1993
Revised Manuscript: July 21, 1993
Published: February 10, 1994
C. M. Choy and L. M. Cheng, "High-efficiency cosine-approximated binary Gabor zone plate," Appl. Opt. 33, 794-799 (1994)