Generation: Gen is a commonly used abbreviation that refers to the power or “generation” of image intensifier night vision tubes. The key difference between the night vision generations is the intensifier technology. The tubes of 1st, 2nd and 3rd Generations are generally recognized, but the US government has recently begun purchasing newly issued tubes, recognized as Gen 4 by certain companies.

1st Generation: 1st Generation or Gen 1 is currently the most popular commercial grade of night vision tube in the world due to their relatively low cost. Gen 1 devices amplify existing light several hundred times. With many Gen 1 units, it is normal to hear a slight high-pitched whine when the unit is on. This whine not only proves distracting to many users, but also limits stealth in various tactical applications. Yukon technicians have corrected this drawback to ensure that all Yukon Gen 1 devices are silent and allow for undetected use. Gen 1 tubes frequently produce an image that is slightly blurry around the edges. This phenomenon is known as “geometric distortion.” When you turn a Gen 1 tube off, it may glow green for a short time. For this reason, an on/off light indicator is especially advantageous and prevents the unit from being left on accidentally resulting in decreased tube life.

2nd Generation: 2nd Generation or Gen 2 is primarily used by law enforcement or for professional applications. The primary difference between Gen 1 and Gen 2 is the addition of a micro-channel plate (MCP). The MCP is located directly behind the photocathode, where it amplifies electrons, resulting in a brighter and thus sharper image. For this reason, a Gen 2 unit frequently costs between $500.00 and $1000.00 more then a Gen 1 device.

2+ Generation: Gen 2+ intensifier tubes are produced with similar technology to that of regular Gen 2 tubes, but the resolution quality is improved. Gen 2+ devices are a good choice for individuals who want premium grade optics without Gen 3 prices.

3rd Generation: Gen 3 is the most powerful, recognized night vision tube available. Gallium Arsenide is added to the photocathode, resulting in a brighter, high resolution image. Due to their premium status, many Gen 3 units will cost in excess of $3000.00.

4th Generation: The US Government is currently purchasing tubes that are identified as 4th Generation. Since the terminology is relatively new, some industry professionals consider Gen 4 as merely an improvement upon Gen 3.