Optical filter performing localized image transformations using volume holograms

Sigurd Kusch; Jochen Schwab; Norbert Lauinger

doi:10.1117/12.290315

26 September 1997 Optical filter performing localized image transformations using volume holograms

Sigurd Kusch, Jochen Schwab, Norbert Lauinger

Proceedings Volume 3208, Intelligent Robots and Computer Vision XVI: Algorithms, Techniques, Active Vision, and Materials Handling; (1997) https://doi.org/10.1117/12.290315
Event: Intelligent Systems and Advanced Manufacturing, 1997, Pittsburgh, PA, United States

Abstract

We present an optical filter device doing local transformations. This is achieved by recording various sets of Bragg planes in a volume hologram with each set tilted by a different small angle. The incoming light is diffracted by such a bundle of planes resulting in a process which is similar to the refraction of light by a lens. The property of this optical transform is that the transform plane is located directly behind the filter plane. Spatially localized transformations of the input amplitude distribution are achieved. We calculate plane bundles and the field distribution behind the volume hologram using the coupled wave theory. The functionality of the principle is demonstrated for a simple example. This new filtering method results in a local transformation property which is performed in real time; such a filter can be placed directly on a detector array such as a CCD chip achieving a very robust and compact arrangement.

Citation Download Citation

Sigurd Kusch, Jochen Schwab, and Norbert Lauinger "Optical filter performing localized image transformations using volume holograms", Proc. SPIE 3208, Intelligent Robots and Computer Vision XVI: Algorithms, Techniques, Active Vision, and Materials Handling, (26 September 1997); https://doi.org/10.1117/12.290315

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