Two-dimensional PSD (Position Sensing Detector) – SiTek

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The SiTek Two-dimensional PSD (Position Sensing Detector) has high resolution, fast response and outstanding linearity. 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. There is also an UV version available. The UV PSD is a detector optimized for use in the UV wavelength region 200-400 nm, although its spectral response reaches up to 1100 nm. The sensitivity in the UV region (200-400 nm) is extremely high. The UV-PSD has the same outstanding specifications as the standard SiTek PSD.

Two-dimensional PSD features

  • converts the position of a light or radiation spot into signal currents
  • wide range of spectral response
  • fast response time (1 MHz!)
  • measures light or radiation intensity and position simultaneously
  • independent of light or radiation spot focus



Position non-linearity: +/-0.3% Detector resistance: 10 kohmPart No.DespcriptionActive areaPackageS2 – 00012L2_MP12x2TO-8S2 – 00322L2_CP42x24-pin ceramicS2 – 00022L4_MP14x4TO-8S2 – 00242L4_CP54x44-ceramicS2 – 01842L4_SU714x4SMDS2 – 00032L10_SU710x10substrateS2 – 00332L10_CP610x104-pin ceramicS2 – 01852L10_SU7210x10SMDS2 – 00042L20_SU920x20substrateS2 – 00232L20_CP720x204-pin ceramicS2 – 01962L45_SU2445x45substrate

PSD with enhanced UV respons

Part No.DespcriptionActive areaPackageS2 – 00302L2UV_MP12 x 2TO-8S2 – 00062L4UV_MP14 x 4TO-8S2 – 00162L10UV_SU710 x 10substrateS2 – 00342L20UV_SU920 x 20substrate Contact one of our product specialists or check the PSD application areas. Learn about the PSD in the PSD school

SiTek Electro-Optics, manufacturer of Position Sensitive Detectors (PSD) was founded under the name Sitek Laboratories in 1976 as a spin-off from Chalmers Technical University in Gothenburg Sweden. Th...


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General PSD Datasheet

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