Design of Ultra-High Speed Optical Beam Chopper Rotors
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Design of Ultra-High Speed Optical Beam Chopper Rotors
- Author:
Timon Achtnich, Philipp Bühler
High-speed beam choppers are required to stimulate a sample with a frequency modulated beam or when single pulses have to be isolated out of pulse stream. Usually fast opening and closing times are preferred or required, requiring a fast circumferential speed for the commonly used rotating chopper disks. High circumferential speeds are reached by increasing the rotational speed or the diameter of the chopper disc (or both) but there is limit caused by the rotor material’s tensile strength, the generated losses, and the achievable rotational speed of the controller. This white paper describes the main aspects to be considered when designing an ultra-high speed chopper rotor.
