OSI Optoelectronics, Inc. SL3-1

Superlinear position sensors employ advanced lateral-effect technology to provide a continuous analog output proportional to the displacement of the light spot centroid from the center across the active area. As continuous position sensors, these detectors offer unmatched performance: position accuracy up to 99% within 64% of the sensing area. This accuracy is achieved through lateral-effect technology, whereby the detector is fabricated with two separate resistive layers — one on the top of the chip and one on the bottom. These sensors can be used for one-dimensional or two-dimensional position measurements. To achieve optimal current linearity at high light levels, a reverse bias should be applied to these detectors. The maximum recommended incident power density for lateral-effect PSDs is 1 mW/cm². For best performance, the incident beam should be perpendicular to the active area with a spot diameter less than 1 mm.

• Ultra-linear
• Ultra-high precision
• Wide dynamic range
• High reliability
• Dual-sided structure

Beam alignment, position sensing, angle measurement, surface profile analysis, height measurement