Duo-Lateral, Super Linear PSD’s
Position Sensing Detectors (PSD)



The Super Linear Position Sensors feature state of the art duo-lateral technology to provide a continuous analog output proportional to the displacement of the centroid of a light spot from the center, on the active area. As continuous position sensors, these detectors are unparalleled; offering position accuracies of 99% over 64% of the sensing area. These accuracies are achieved by duo-lateral technology, manufacturing the detectors with two separate resistive layer, one located on the top and the other at the bottom of the chip. One or two dimensional position measurements can be obtained using these sensors.
A reverse bias should be applied to these detectors to achieve optimum current linearity at high light levels. For position calculations and further details on circuit set up, refer to the “Photodiode Characteristics” section of the catalog.

The maximum recommended power density incident on the duo lateral PSDs are 1 mW / cm2.
For optimum performance, incident beam should be perpendicular to the active area with spot size less than 1mm in diameter.


  • Super Linear
  • Ultra High Accuracy
  • Wide Dynamic Range
  • High Reliability
  • Duo Lateral Structure


  • Beam Alignment
  • Position Sensing
  • Angle Measurement
  • Surface Profiling
  • Height Measurements
  • Targeting
  • Guidance Systems
  • Motion Analysis
Duo Lateral