Designing a new spatial light modulator for holographic photostimulation
| Autor: | Janelle Shane, Kevin Taberski, Adrian Hill, Steve Serati, Douglas J. McKnight |
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| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Spatial light modulator
Physics - Instrumentation and Detectors Pixel Computer science business.industry Holography FOS: Physical sciences Field of view Instrumentation and Detectors (physics.ins-det) Frame rate law.invention Switching time Liquid crystal on silicon Optics law business Field-programmable gate array Optics (physics.optics) Physics - Optics |
| Popis: | Driven by the demands for speed and field of view in the holographic photostimulation community, we designed, built, and tested a liquid crystal on silicon (LCoS) spatial light modulator (SLM) with a 1536x1536 square pixel array and high-voltage LC drive. We discuss some of the engineering work that made the MacroSLM possible, including the custom FPGA board for handling huge data rates, the large pixel size for minimizing rolloff and crosstalk, and the temperature control to handle heating effects from the high-voltage controls and high-power laser illumination. We also designed an FPGA implementation of the overdrive method for increasing liquid crystal switching speed, allowing us to overcome the significant data bottlenecks that limit frame rates for large arrays. We demonstrate 500 Hz hologram-to-hologram speed at 1064 nm operating wavelength, and discuss the new science that these speeds and array sizes have enabled. preprint of SPIE San Diego 2019 proceedings paper updated with minor edits including additional references and margin adjustments |
| Databáze: | OpenAIRE |
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