The Alpha Optics AO-22525R/H 25 mm Gen 2+ image intensifier with S-20 photocathode with an extended red response is available with fiber optics input and output windows. It’s a direct replacement for MX9644 and XX2052 models. The tube comprises a special fiber optic faceplate, microchannel plate (MCP) current amplifier, and phosphor screen. Incorporated electronics includes an advanced automatic brightness control, and manual adjustment to a desired brightness level. Power supply has a built-in photocathode protection against high light level exposure.