High-efficiency cosine-approximated binary Gabor zone plate

Abstract

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.

Broadband antihole photon sieve telescope

“…The advantage of this approach is that a well-defined flat can be achieved relatively easily. The diffractive element considered in this case is a photon sieve [1][2][3][4][5][6] that is based on a traditional Fresnel zone plate (FZP) [7][8][9][10]. The photon sieve is superior to the FZP in that no support struts or backing structure is required, so highcontrast imaging can be achieved with no scatter or diffraction spikes.…”

Large optical photon sieve

“…The diffractive element considered in this case is a photon sieve, [4][5][6][7][8] which is based on a traditional Fresnel zone plate (FZP). [9][10][11][12] Unlike a FZP, the photon sieve has no connected regions, thus permitting the fabrication of a single surface without any supporting struts required. Furthermore, apodization is easily incorporated into a photon sieve simply by modifying the number of holes per zone.…”

Carbon Nanotube Array Based Binary Gabor Zone Plate Lenses

“…Since the binary GZP has no higher order, it has high potential for optics applications such as Broglie matter wave optics and hard X-rays due to low-cost and facile production. Nevertheless, its fabrication is challenging due to the complex azimuthal transmission function 8 – 10 . Although binary GZP can be fabricated in a Kipp-inspired sieve configuration, it yields inefficient light focusing intensity 9 .…”