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Phase-Locked Loop Optical Chopper

Photonics Showcase
May 2014
Terahertz Technologies Inc.Request Info
 
The C-995 Phase-Locked Loop Optical Chopper provides crystal-controlled chopping rates of 4 Hz to 5 KHz using only one blade. The use of direct digital synthesis permits the rate to be set to a precision of 0.001 Hz and provides quartz crystal stability. Frequency settings may be made via front panel controls and its bidirectional RS-232 port. Additionally, it may be phase-locked to a user-supplied external clock. Both enclosed and open-style chopper heads are available.


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GLOSSARY
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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