Steering accuracy of a spatial light modulator-based single beam steerer: guidelines and limitations

David Engström; Jörgen Bengtsson; Emma Eriksson; Mattias Goksör

doi:10.1117/12.798133

29 August 2008 Steering accuracy of a spatial light modulator-based single beam steerer: guidelines and limitations

David Engström, Jörgen Bengtsson, Emma Eriksson, Mattias Goksör

Proceedings Volume 7038, Optical Trapping and Optical Micromanipulation V; 703829 (2008) https://doi.org/10.1117/12.798133
Event: NanoScience + Engineering, 2008, San Diego, California, United States

Abstract

The positioning accuracy when a phase-only one dimensional spatial light modulator (SLM) is used for beam steering is limited by the number of pixels and their quantized phase modulation. Optimizing the setting of the SLM pixels individually can lead to the inaccuracy being a significant fraction of the diffraction limited spot size. This anomalous behaviour was simulated numerically, and experiments showed the same phenomena with very good agreement. However, by including an extra degree of freedom in the optimization of the SLM setting, we show that the accuracy can be improved by a factor proportional to the number of pixels in the SLM.

Citation Download Citation

David Engström, Jörgen Bengtsson, Emma Eriksson, and Mattias Goksör "Steering accuracy of a spatial light modulator-based single beam steerer: guidelines and limitations", Proc. SPIE 7038, Optical Trapping and Optical Micromanipulation V, 703829 (29 August 2008); https://doi.org/10.1117/12.798133

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