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Microchannel plates (MCP) for Night Vision Devices

Active Area diameter (mm) 18 25
Pore size (um)

Basic application of Microchannel plates (MCPs) is Night Vision Technique. MCP is the main element of an Image Intensifier Tube (IIT), which is in its turn the primary element of a Night vision device (NVD). Therefore, the performance of a NVD greatly depends on MCP characteristics. LLC "BASPIK" produces Microchannel Plates of different configurations: round, square, rectangular, with center hole, having 4, 5, 6, 8, 10 um pores. MCP pore size variation is not higher than 1.3%

"BASPIK" MCP manufacturing technology is unique, and has no analogues in the world.

MCP construction

MCPs consist of multifibers.

The unit cell consists of seven channels, possible minimum diameter of each channel - 4um.

Our company manufactures MCPs with 4 um pore size.

MCP key structural parameters:
Channel Density
Channel variation coefficient
σ(d) – mean-square deviation, dc – the average of channels diameters.
Open Area Ratio


"BASPIK" MCPs limiting resolution DOESN'T CHANGE or CHANGES INSIGNIFICANTLY at voltage incensement:


  • Pic. 1. "BASPIK" MCPs resolution
  • Pic. 2. Limiting resolution of  "BASPIK" MCPs with 8, 6, 5 and 4um pore size versus MCP Voltage at Field Strength of MCP - Phosphors Screen equal to 10KV/mm.

Tightened inspection guarantee sustained performance of output production.

Microchannel plates with 4 and 5 um pore size must be thin (250um and less). VTC "BASPIK" production technology permits such MCPs manufacturing preserving MCP configuration even after thermo-vacuum bakeout. "BASPIK" fine-structural MCPs with 4–6um pore size, 213-294um in thickness don’t change in configuration after thermo-vacuum bakeout at temperature levels of about 420-500°С during 24 hours, and don’t crack after mechanical testing procedures.

MCPs mechanical strength permits their utilization inside Image Intensifier Tubes intended for Night Vision Devices of broad applications.

The results of construction-technological testings, which take place in the company regularly, showed that mechanical strength of "BASPIK" MCPs meets Microchannel Plates technical requirements and withstands sinusoidal vibration (at acceleration of 10g, 15g and 20g and frequency band within 1 – 1000 Hz, during 6 hours, 3 hours at each of two mutually perpendicular directions), single mechanical shock (at acceleration of 300g, shock pulse duration 1 – 3 ms, shocks number 10000,15000 and 20000) and single mechanical shocks (at acceleration of 500g, 750g, 1000g and 1500g, total shocks number - 6, 3 shocks at each of two mutually perpendicular directions).

LLC VTC "BASPIK" MCPs gassing level is low,operating life is long. The plates don’t need to be cleaned at that.

At MCPs exploitation under space charge saturation mode pulse height distribution has the following characteristics:

a)  Pulse height resolution is 100–125%, peak-to-valley ratio 1.5–2. MCPs almost don’t produce dark scintillations with energy higher than 2е.

b) MCP Noise Factor is in the range of 1.9 – 2.3.

  • Pic. 3. Single-electron pulse height distribution 6μm pore size MCP,
    at gain 3*104 (UMCP = 1260 V).
  • Pic. 4. MCP dark pulses distribution 6μm pore size MCP,
    at gain 3*104(UMCP = 1260 V).
    Dark count rate density is 0,39 cps/cm2 (cps – count per second).
    MCP dark current density is not higher than 1*10-15A/cm2.

MCP Exploitation Directions

  1. MCP is intended for operating in vacuum at residual gasses pressure not higher than 1.33×10-3Pa (1×10-5Torr).
  2. While operating with MCP it is necessary to follow clean rooms hygiene technical and organizational requirements according to State Standard ISO 14644-1-200; indoors: range of purity 7 ISO; work place range of purity 5 ISO.
  3. Environment temperature must be in the range of 20 - 24°С, relative humidity - 40% - 65%.
  4. The air inside clean rooms and working areas mustn’t contain any alkali metals compounds, chlorine or microorganisms.
  5. Thermo-vacuum bakeout is allowed at 460°С during not longer than 6 hours, at maximum pressure level 1.33×10-4Pa (1×10-6Torr).
  6. Preliminary MCP physicochemical processing, MCP processing with reaction gasses and alkali metals vapors when making Image Intensifier Tubes is allowed only after modes conditions consideration by the manufacturer.
  7. Maximum shelf life of "BASPIK" MCPs inside packings provided by their manufacturer is 6 months. Long-term storage of MCPs is allowed in vacuum, using oil-free pumps, at maximum residual gasses pressure 1.33×10-3Pa (1×10-5Torr).

Manufacturer’s Warranties

Shelf-life:

6 months in container provided by the manufacturer, 1 year in vacuum (at residual gasses pressure not better than 1.33×10-3 Pa), during 4 years (minimum) as a part of applicable device. The shelf-life is to be calculated from the acceptance date of manufacturer’s quality inspection, and in a case of reacceptance from the reacceptance date.