Various methods are available for detecting the position of incident light. These

include methods using small discrete detector arrays or multi-element sensors such

as CCD sensors. In contrast to these sensors, PSDs (Position Sensitive Detectors)

are comprised of a monolithic detector with no discrete elements and provide

continuous position data by making use of the surface resistance of the photodiode.

PSDs offer advantages such as high position resolution, high-speed response and

reliability.

What is PSD?

· Excellent position resolution

· Wide spectral response range

· High-speed response

· Detects center-of-gravity position of spot light

· Simultaneously detects light intensity and center-of-gravity position of spot light

· High reliability

n Features of PSD

· Position and angle sensing

· Distortion and vibration measurements

· Lens reflection and refraction measurements

· Laser displacement sensing

· Optical remote control

· Optical range finders

· Optical switches

· Camera auto focusing

n Applications of PSD