Article
Efficient Storage, Computation, and Exposure of Computer-Generated Holograms by Electron-Beam Lithography
Applied Optics
(1993)
Abstract
An efficient storage format was developed for computer-generated holograms for use in electron-beam lithography. This method employs run-length encoding and Lempel-Ziv-Welch compression and succeeds in exposing holograms that were previously infeasible owing to the hologram's tremendous pattern-data file size. These holograms also require significant computation; thus the algorithm was implemented on a parallel computer, which improved performance by 2 orders of magnitude. The decompression algorithm was integrated into the Cambridge electron-beam machine's front-end processor.Although this provides much-needed ability, some hardware enhancements will be required in the future to overcome inadequacies in the current front-end processor that result in a lengthy exposure time.
Disciplines
Publication Date
May, 1993
Citation Information
Dennis Goeckel. "Efficient Storage, Computation, and Exposure of Computer-Generated Holograms by Electron-Beam Lithography" Applied Optics Vol. 32 (1993) Available at: http://works.bepress.com/dennis_goeckel/30/