Publication: Research - peer-review › Article in proceedings – Annual report year: 2007
With the aid of phase-only spatial light modulators (SLM), generalized phase contrast (GPC) has been applied with great success to the projection of binary light patterns through arbitrary-NA microscope objectives for real-time three-dimensional manipulation of microscopic particles. Here, we review the analysis of the GPC method with emphasis on efficiently producing speckle-free two-dimensional grey-level light Patterns. Numerical simulations are applied to construct 8-bit grey-level optical potential landscapes with high fidelity and optical throughput via the GPC method. Three types of patterns were constructed: geometric block patterns, multi-level optical trap arrays, and optical obstacle arrays. Non-periodic patterns were accurately projected with an average of 80% diffraction efficiency. Periodic patterns yielded even higher diffraction efficiencies, averaging 94%, by the utilization of large-aperture phase contrast filters.
|Title of host publication||Optical trapping and optical micromanipulation 4|
|Editors||K. Dholakia, G.C. Spalding|
|Publisher||International Society for Optical Engineering|
|Conference||SPIE optics and Photonics 2007|
|City||San Diego, CA (US)|
|Period||01/01/07 → …|
|Name||SPIE Proceedings Series|
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