Hybrid Photo Diode (HPD)

Proximity & electrostatic focus

HPDs combine vacuum-based image intensification techniques with a silicon diode to provide maximum photon amplification while virtually eliminating additional noise.

  • Proximity or electrostatic focus
  • Large detection area (16, 18, 25. 40 or 72 mm)
  • Single or multi-stack MCP configuration
  • Single or multi-pixel configuration
  • Hi-QE photocathode option


Superior photon detection with nearly zero noise

Hybrid photo diode (HPD) detectors provide excellent single photon detection capability with good linearity and fast timing. A wide range of models are offered to ensure you capture every available photon.
HPDs detect the greatest amount of photons with virtually no added noise, combining vacuum-based image intensification technologies with a silicon diode. Photonis offers a wide range of standard and custom detectors that are specifically designed for your application. Options include focus type, optic entry window, photocathodes, MCP configurations and pixel configuations. Power supplies and cameras can also be ordered to support your specific application. HPDs are well-suited for high energy physics research, specialized medical imaging or space exploration.

Did you know?

Our partner Photonis developed custom hybrid photo diode detectors for use in CERN, in support of the LHCb RICH1 system. 

Technical Specification

The Hybrid Photo Diode detector can be customized in a number of ways. If you need assistance with ordering a custom detector, please contact us and an application engineer can assist you.

  • Focus type: Electrostatic or proximity focused
  • MCP size: 16, 18, 25, 40, or 72mm MCPs are available
  • Multi MCPs: Multiple MCPs can be ordered in Chevron (2) or Z-stack (3) configurations
  • Pixels: Single or multi-pixel configurations are available
  • Photocathodes: A wide variety of photocathodes are available, including our exclusive Hi-QE option