You are here

Miniaturised Optical Encoder

John Carr, Marc Desmulliez
Optical encoders are pervasive in almost all sectors of industry. However the critical alignment requirements between the optical gratings and to the photodiode array, ... [read more]

Optical encoders are pervasive in almost all sectors of industry. However the critical alignment requirements between the optical gratings and to the photodiode array, the bulky nature of the encoder devices and subsequent packaging mean that optical encoders can be prohibitively expensive for many applications and unsuitable for others. Therefore researchers at Heriot-Watt University have developed a novel optical encoder by monolithically integrating all optical components onto a single semiconductor chip with novel detector arrangements. Wafer scale processing and flip chip bonding procedure have been developed such that the footprint, cost and alignment tolerances are significantly reduced.