Modulated Laser Receiver

This can be used for demonstrating the transmission of information via a modulated laser beam, and for simple speed of light determinations.
It includes a self contained receiver unit comprising an opto-detector coupled to a wide band amplifier.
A miniature speaker is incorporated to provide an audible signal from modulation frequencies within the audio frequency range, although if ‘demonstration level’ volume is required, a separate amplifier/speaker system is recommended.
Powered by a 9V PP3 battery
An ON/OFF switch is incorporated.
• Frequency response (opto-detector/amplifier): 100Hz to 5MHz.
• Dimensions: 120 x 65 x 35mm.