Continuous-relief diffractive optical elements for two-dimensional array generation
Year: 1993
Type: article
Abstract: Continuous surface-relief diffractive optical elements for two-dimensional array generation (fan-out) are designed and fabricated. Separable and nonseparable solutions for the two-dimensional element design are compared. The phase-grating microstructures are generated by laser-beam writing lithography in a single exposure step and converted to nickel shims by electroplating, enabling low-cost replicas to be produced by using laboratory and commercial replication processes. Results are presented for a 9 x 9 fan-out diffractive optical element with a measured efficiency of 94% and an overall uniformity within +/-8%; replicas in epoxy have the same efficiency and a uniformity of +/-15%.
Source: Applied Optics
DOI: 10.1364/ao.32.002526
Authors: Michael T. Gale, Markus Rossi, Helmut Schütz, Peter Ehbets, Hans Peter Herzig, Damien Prongué
Institutions: Paul Scherrer Institute, University of Neuchâtel
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W2000809325