Black Spots are cosmetic blemishes that may originate from fixed particles inside the I2 tube or in the fiber optic. Small size black spots in the I2 tube are inherent to the manufacturing process and do not affect the performance or reliability of the device...
Chevron Start-up procedure
Chevron MCP and Detector Initial Start-up and Electrical Test Procedure
Development of Night Vision
The first night vision devices were introduced during World War II. Generation 0 devices did not actually amplify ambient light, but rather allowed a user to see near‐infrared light. These so‐called active devices required the use of a large infrared light source to illuminate targets, and consequently were easily detectable by opposing forces using similar equipment...
Image Intensifier Tubes work by collecting low levels of light, amplifying them to levels that can be easily observed. The tube gain (which is also referred to as brightness gain or luminance gain) is the magnitude, or number of times the image intensifier amplifies the light input. Gain is calculated as the ratio of light output divided by light input and typically has a value1 of 15,000 cd/m²/lx, with a maximum of 22,000 cd/m²/lx. In all night vision systems, the gain is reduced by the system’s lenses and is affected by the quality of optics and filters, therefore system gain is an important measure of performance for the end user...
When operating in dynamic light conditions, images provided through Image Intensifier Tubes show “halos” around the brightest spots in the scene, for example; street lights or car headlights are typically surrounded by round bright areas, disturbing the overall image quality and ‘whiting out’ part or the entire image. The primary cause of a halo is the fraction of photoelectrons generated by the photocathode when they hit the surface between holes of the MCP input, and then backscatter.
Handling & Storage Instructions – DE
LAGERUNG, BEHANDLUNG und ANWENDUNG von MIKROKANALPLATTEN (MCPs)
Handling & Storage Instructions – EN
Storage, Handling and Operation of Microchannel Plates - English version