Note : a simple laser shutter with protective shielding for beam powers up to 1 W

Colquhoun, Craig D. and Di Carli, Andrea and Kuhr, Stefan and Haller, Elmar (2018) Note : a simple laser shutter with protective shielding for beam powers up to 1 W. Review of Scientific Instruments, 89 (12). 126102. ISSN 0034-6748

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    Abstract

    We present the design of an inexpensive and reliable mechanical laser shutter and its electronic driver. A camera diaphragm shutter unit with several sets of blades is utilized to provide fast blocking of laser light and protective shielding of the shutter mechanism up to a laser beam power of 1 W. The driver unit is based on an Arduino microcontroller with a motor-shield. Our objective was to strongly reduce construction effort and expenditure by limiting ourselves to a small number of modular parts, which are readily available. We measured opening and closing durations of less than 800 µs, and a timing jitter of less than 25 µs for the fastest set of blades. No degradation of the shutter performance was observed over 5·10^4 cycles.