Optical axis height is approximately 100 mm. The required disc depending on the frequency can be fixed to the rotating head. This system can provide wide range of frequencies (10Hz - 3.7kHz.) A wide selection of additional discs and accessories are available to extend the frequency range and to satisfy individual requirements. Frequency is displayed directly on the digital display of the control unit. The easy-to-interchange blades are made of corrosion protected material for durability.
An optical chopper is a mechanical device which physically chops a light beam into discrete light pulses. It is widely used in various optical experiments. It modulates different light sources with given frequency for their subsequent analysis. The chopping discs come in a variety of slot apertures and can be replaced with ease.