Sciencetech’s Model 600-VS25 high speed shutter is a required accessory with Sciencetech’s area scan CCD detectors, but can also be used with Sciencetech’s LDA photodiode or InGaAs linear array detectors (optional, but not necessary). The external version of this shutter can also be used with Sciencetech small beam SF150 Solar Simulator. The model 600-VS25INT is an internal version that mounts inside a Sciencetech spectrograph behind the input port. The model 600-VS25ext is an external self enclosed version designed to be mounted outside the input or output port of non-Sciencetech spectrographs or with Sciencetech SF150 Solar Simulator. Due to focal plane spatial constraints of the output port on most spectrographs, the model 600-VS25Ext is typically mounted at the input port via coupling tubes. The 600-VS25 series high speed detector shutter is computer controlled via Sciencetech's multi-channel detector’s PCI A/D data acquisition board (sold separately with the detector). Sciencetech’s Sci-LDA software application or Read-LDA (ActiveX Control) is also required to control the shutter in synchronization with the detector. The shutter has its own power supply, electronics module, and cable that connects it with the Sciencetech PCI A/D data acquisition board. It has a 25mm diameter aperture, minimum exposure time is 6ms (40Hz), and maximum exposure time is several minutes. Time to open is 3ms.

External Shutter
If this shutter is used with a non-Sciencetech spectrograph, please specify the external version as it may not be possible to mount the internal version inside the third party spectrograph. However, it is unlikely that an external shutter can be mounted between the output port of the the 3rd party spectrograph and its detector, as this configuration would most likely disrupt the focal plane. The external shutter should therefore be placed at the input port, right before the input slit of the spectrograph. An external shutter also requires its own power supply to the electronics as the shutter typically uses the existing power supply from Sciencetech monochromators and spectrographs.

Thermal Heat Consideration
The shutter is made of steel and can withstand 5W/mm² (up to 200°C) so it can handle most input light.

Required Software and Electronics
The shutter requires control software and electronics to operate it. Since it is typically purchased in combination with Sciencetech's CCD (or LDA) detectors, it is designed to be connected to the detector's data acquisition AD Board for use with Sciencetech SCI-LDA or READ-LDA (Active-X Component) sofwares. The softwares would send the shutter open/close commands through the detector's AD Board in synchronization with the detector's acquisition time. Therefore, a Sciencetech 12-bit or 16-bit data acquisition AD Board is required to operate this shutter with Sciencetech's softwares. If this shutter is not purchased with a Scienceetech detector system, a customer would either need to provide their own electronics and software control combination that sends a 5V TTL signal, or purchase Sciencetech's data acquisition AD board for detectors just to operate it. This data acquisition AD Board is listed as an optional accessory.

Third Party Shutter Control
The shutter itself has its own electronic PCB mounted inside the Sciencetech spectrograph or solar simulator. A BNC connector (TTL 5V) to control the shutter can be found. On a Sciencetech spectrograph body, it is next to the RS-232/USB port for controlling the grating turret. On a Sciencetech SF150 small beam solar simulator, it is next to the solar filter box holder. A user can control the shutter with his own electronic and software combination by supplying the correct TTL signal to this BNC connector. Please see the operators manual for details. This solution maybe cheaper than purchasing a Sciencetech data acquisition AD Board that is also designed for use with Sciencetech CCD and LDA detectors.