Optical Choppers and Shutters Optical choppers are mechanical devices which intercept a light beam on a periodic basis. Boston Electronics provides several optical chopping devices. Also available are lock-in amplifiers , often used in conjunction with optical choppers. An optoswitch senses disk position and provides a reference output monitoring the chopping frequency. An external control input permits the speed to be matched to an external signal.
Numerous accessories are available.
Our general purpose lab bench units with 102mm diameter disks cover the frequency range of 5 to 20,000Hz, with options extending this down to 0.01Hz and up to 45,000Hz. Miniature units with 30mm diameter disks cover the frequency range 5 to 8000Hz. OEM versions, designed to be embedded in an apparatus or instrument of customer design, lack mechanical mounts and electrical interconnections but are otherwise complete. Miniature Optical Chopper Scitec 350 OEM Miniature Optical Chopper Scitec 360 OEM Miniature Chopper with advanced PC-board For more technical data on the choppers, view the following manuals. Tuning fork choppers resemble musical tuning forks with small vanes mounted on the tines.