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The self-focusing Fresnel-Dammann grating and the Fresnel binary CGH for compact 2-D light spot array generation

Godwin, D.P.; Selviah, D.R.; Carey, C.D.; Midwinter, J.E.; (1993) The self-focusing Fresnel-Dammann grating and the Fresnel binary CGH for compact 2-D light spot array generation. In: Fourth International Conference on Holographic Systems, Components and Applications, 1993. (pp. pp.147 - 152). IEEE: London, UK. Green open access

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Abstract

The authors have described the design and demonstrated the performance of two types of lensless array generator. The Self-focusing Fresnel-Dammann grating (SFD), and the Fresnel hologram. The SFD is based on a conventional Dammann grating, but obviates the need for extraneous Fourier transform lenses, by combining the grating with a Fresnel zone plate, in an exclusive-OR fashion. No alignment is required and no bulky or dispersive refractive elements are used. The Fresnel hologram can be designed for high fanout, but the design must take into account the phases of the light spots in the image array. The authors have demonstrated this for an 8times8 fanout element, where a set of random phases in the output gave rise to a satisfactory performance, whilst another set of phases gave an undesired, although interesting, result. The authors have also demonstrated a 30deg slanted axis, random phase design, generating a two dimensional array of 8times8 beams, used in reflection, and operating in a multiple reflection, planar-optic configuration

Type: Proceedings paper
Title: The self-focusing Fresnel-Dammann grating and the Fresnel binary CGH for compact 2-D light spot array generation
Open access status: An open access version is available from UCL Discovery
Publisher version: http://ieeexplore.ieee.org/iel3/1179/6623/00263303...
Language: English
Additional information: ©1993 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords: Fourier transform optics, computer-generated holography, holographic gratings, holographic optical elements, optical interconnections, optical self-focusing, optical zone plates, spatial light modulators
UCL classification: UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/2674
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