The SiTek Standard PSD (Position Sensing Detector) has high resolution, fast response and outstanding linearity. It is used in a wide variety of applications, most of them utilizing light sources in the visible or near-infrared part of the spectrum. The spectral range covers the region 400 – 1100 nm. Thanks to SiTek’s proprietary AR-coating, optimized around 860 nm, a reflection loss of only 2% is achieved around the responsivity peak. Most of the detectors have a cover window to avoid handling damages.

Position Sensing Detectors (PSD)

The PSD (Position Sensing Detector) is an opto-electronic device which converts an incident light spot into continuous position data. It provides outstanding resolution, fast response, excellent linearity for a wide range of light intensities and also simple operating circuits.

There are two main types of PSDs available: one-dimensional and two-dimensional.

Key Features

• Converts the position of a light or radiation spot into signal currents
• Outstanding position resolution and linearity
• Wide range of spectral response
• Works with a wide range of light or radiation intensities
• Short response time
• Measures light or radiation intensity and position simultaneously
• Independent of light or radiation spot focus
• High dynamic range

Quick reference data

PSD with stray-light elimination

PSD with Enhanced UV respons

Common data for all SiTek PSDs

Application Areas

Application areas using SiTek PSD include non-contact distance measurement systems based on triangulation, alignment and surface level measurement, position and motion measurement, optical spectrum analysis, three-dimensional machine vision for contour mapping, and angle measurement systems.

Custom Solutions

Need a solution tailored to your project? We can make it happen. Our R&D engineers can customize our technology to meet your specific requirements. Simply complete the contact form, and a member of our team will be in touch shortly.