This liquid crystal shutter is a vibration-free alternative to mechanical shutters for use in high-speed shutter applications. It uses a Swift LC cell between crossed polarizers to provide submillisecond switching for both opening and closing. Switching time is 125 microseconds to open and 125 microseconds to close. The switching times are less than 50 microseconds if the shutter is heated to 40° C. The D3060HV controller povides this temerature control capability. These shutters show some hazxiness in the liquid crystal layer in the blue and green wavelenths. The light loss from this haze is about 1% at 700 nm but increases monotonically to about 10% loss at 450 nm. Scatter at wavelengths above 700 nm is negligible. The shutter is supplied with integral dichoic visible polarizers that funtion over the wavelength range of 450 nm to 700 nm to provide an average contrast ratio of better than 200:1. Shutters with larger aperture sizes and with wavelength coverage to 2.1 microns are available on a custom basis. Please call with your special requirements.
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