ALPHA OPTICS AO-31821S Gen 3 Image Intensifier Tube

The Alpha Optics AO-31821S is 18mm, Gen 3, high-gain, high photosensitivity Inverting Image Intensifier Tube encapsulated within a hard-surface insulating sleeve and suitable for passive night vision systems and goggles. The AO-31821S consists of a high-efficiency (GaAs) extended red photocathode on a twisted fiber optic output window; glass input window; micro-channel plate (MCP) current amplifier. The AO-31821S has a built-in high-voltage power supply with overload protection circuit which incorporates (ABC) automatic brightness control to provide constant output image brightness as light levels varies. The power supply also provides (BSP) bright source protection to guard the tube against exposure to high levels of light and autogating feature (optional) to protect the tube against exposure to high levels of light.