Journal article
Optimizing the generalized phase contrast method for a planar optical device
We analyse and optimize the output of a planar optical device implementing the generalized phase contrast method. Surface-integrated diffractive micro-optical components build up a spatial filtering-based common-path interferometer consisting of a 4f lens configuration with a phase contrast filter etched as a 5 µm diameter steep-edged cylindrical hole at the Fourier plane.
This filter is designed for operation at λ = 632.8 nm and carries out a phase shift of π for the on-axis region of the focused light. The performance of the device is analysed in terms of throughput and visibility of input phase patterns. A practical design for improved performance is also evaluated for application in visualization of two-dimensional phase patterns as applied in electro-optical data communications, particularly in security and product authenticity verification applications.
Language: | English |
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Year: | 2003 |
Pages: | S211-S215 |
ISSN: | 14644258 , 17413567 , 20408986 and 20408978 |
Types: | Journal article |
DOI: | 10.1088/1464-4258/5/5/367 |