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  • Optical Chopper
Oct 2014
New FocusRequest Info
SANTA CLARA, Calif., Oct. 23, 2014 — With a chopping frequency phase-locked to its own internal frequency synthesizer, the Model 3502 optical chopper from New Focus can chop from 4 HZ to 10.65 kHz.

The chopper features outputs at the sum and difference of the inner and outer wheel’s chopping frequencies for nonlinear-optics experiments, as well a high-stability phase shifter than can lock two choppers together for long fluorescence-decay measurements.

Replacing the 3501 chopper, Model 3502 can achieve variable duty-cycle chopping by mounting two of the same wheels on the chopper head.


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optical chopper
A mechanical or electrical-electromagnetic device for periodically interrupting or blocking abeam of light for a brief known interval. The three most common chopper types include the tuning fork chopper, the rotating shutter chopper (also referred to as rotating disc chopper) chopper and the more sophisticated optical chopper such as the Kerr cell.
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