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What is PSD?

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.

■ Features of 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

■ Applications 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