To be effective, an optical chopper should have a stable rotating speed.

An optical chopper is a device which periodically interrupts a light beam.

Frequently asked questions on optical choppers.

The ball measures distances moved by rotating orthogonal shafts which drive optical chopper wheels turning in the slots of slotted switches.

Optical choppers, usually rotating disc mechanical shutters, are widely used in science labs in combination with lock-in amplifiers.

CAPCOM channel 0 is used in negative edge-triggered mode as this is the best defined edge output by the optical chopper.

This can be done, for instance, by modulating the source light entering the system with an optical chopper, and isolating the detected source signal component from the detected stray component with a Lock in amplifier synchronized to the chopper frequency.