OVNI-M and OVNI-B are manufactured in France with the most powerful intensifier tubes in the world, called « Astronomy Grade GEN3 Thin-Film ». Designed in our workshop, these « Astronomy Grade » intensifier tubes are one of the many OVNI Night Vision innovations meaning that each tube has been specifically developed for astronomy.

Our intensifier tubes are available in the versions FOM2100, FOM2400, FOM2600. The FOM (Figure of Merit) is the main measure of performance. It is the minimum FOM because it will automatically be higher. For example a FOM2100 means that the tube will have a FOM equal or superior to 2100. Knowing that a FOM2100 is exceptional and a FOM2600 is simply the best.

However, the FOM is not the only measure to be taken into account to define the performance of a tube « Astronomy Grade » and it is also appropriate to have the highest performance on other values such as EB, Luminous gain, Luminous Sensitivity, SNR, Limiting Resolution... Each OVNI-M and OVNI-B is delivered with a tube data sheet measuring all its values and guaranteeing that each tube is manufactured according to our own criteria of performances perfectly optimized for astronomy. A description of these measurements and an example of a tube data sheet are available in the OVNI-M / OVNI-B user guides.

In addition, OVNI Night Vision « Astronomy Grade » tube meets other parameters:

★ all our tubes are clean tube meaning without black spot or chicken wire / honeycombs patterns that can interfere with visual observation and present on the majority of civilian and military tubes. 

★ all our tubes have 2 essential features for astronomy. The manual gain control to reduce or eliminate scintillation (mainly when using a narrow bandwidth filter) and the autogated feature to protect the tube in case of high light intensity.

★ all our tubes have a white phosphor perfectly adapted to astronomy since it has a a neutral and natural color, much better than the green phosphor (delivering a greenish tint during observation).

With the help of the video below, the operation of the intensifier tube can be explained in 3 steps:

  1. The photons composing the ambient light (visible and near infrared) are transformed into electrons by the photocatode.
  2. The MCP (MicroChannel Plate) multiplies electrons by thousands. About 70,000 times more.
  3. The generated electrons will hit the white phosphorus and be transformed into photons in the same original alignment before passing through the eyepiece.


OVNI Night Vision manufactures in France night vision eyepieces for amateur and professional astronomers (space agencies, observatories, space domain awareness...). We have authorizations and export permits to ship to the following countries : European Union, United Kingdom, Switzerland, Norway, United States of America, Canada, Australia, New Zealand and Japan. For shipping to countries other than those listed above, please inform us before ordering.