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2. Apr 2019. Circular and video shutter from liquid crystal technologies. http://www.liquidcrystaltechnologies.com/products/LCDShutters.htm. US. Apr 2019. Circular and video shutter from liquid crystal technologies. http://www.liquidcrystaltechnologies.com/products/LCDShutters.htm. US.
3. Apr 2019. DLP-Link 3D Projector Active Shutter. https://bit.ly/2K7q9NA. Apr 2019. DLP-Link 3D Projector Active Shutter. https://bit.ly/2K7q9NA.
4. Apr 2019. Rectangular shutter from Adafruit. https://www.adafruit.com/product/3330. Apr 2019. Rectangular shutter from Adafruit. https://www.adafruit.com/product/3330.
5. DenseVLC