The UANVB Katana is one of the most affordable articulating dual tube systems on the market. This unit has very similar features to the.
If you have questions, or don't know what will work for you, you can always chat with us in our live chat, or give us a call and we would be more than happy to figure out which system will best fit your specific needs. If you do not understand the specs, and would like assistance please give us a call, or join our live chat and we will be more than happy to assist in options. Image Intensification tube specification designation, calculated on line pair per mm x signal to noise. The ability of an image intensifier or night vision system to distinguish between objects close together. Image intensifier resolution is measured in line pairs per millimetre (lp/mm) while system resolution is measured in cycles per miliradian. For any particular night vision system, the image intensifier resolution will remain constant while the system resolution can be affected by altering the objective or eyepiece optics by adding magnification or relay lenses.
Often the resolution in the same night vision device is very different when measured at the centre of the image and at the periphery of the image. This is especially important for devices selected for photograph or video where the entire image resolution is important.
Measured in line pairs per millimetre (lp/mm). SNR (Signal to Noise Ratio). A measure of the light signal reaching the eye divided by the perceived noise as seen by the eye. A tube's SNR determines the low light resolution of the image tube; therefore, the higher the SNR, the better the ability of the tube to resolve objects with good contrast under low-light conditions. Because SNR is directly related to the photocathode's sensitivity and also accounts for phosphor efficiency and MCP operating voltage, it is the best single indicator of an image intensifier's performance. This is the amount of light you see through a night vision device when an image tube is turned on but no light is on the photocathode. EBI is affected by temperature; the warmer the night vision device, the brighter the background illumination.
EBI is measured in lumens per square centimeter (lm/cm2). The lower the value the better.
The EBI level determines the lowest light level at which an image can be detected. Below this light level, objects will be masked by the EBI.
Halo is the circular region around a bright light that appears "brighter" - It's caused by elastic collisions of electrons with the MCP surface which subsequently then bounce off and down another hole. Halo's are the same size all over the screen and the size is dictated by the distance between the photocathode and the MCP.
Basically, it's the round circle around lights when you look at them with Night Vision and it's generally used as an indication that you're looking at something that's too bright. Photocathode sensitivity is a measure of how well the image intensifier tube converts light into an electronic signal so it can be amplified. The measuring units of photocathode sensitivity are micro-amps/lumen (µA/lm) or microamperes per lumen. This criterion specifies the number of electrons released by the Photocathode (PC). PC response is always measured in isolation with no amplification stage or ion barrier (film). Therefore, tube data sheets (which always carry this "raw" figure) do not reflect the fact that over 50% of those electrons are lost in the ion barrier. While for most latest 3rd generation image intensifiers the photoresponse is in the 1800 µA/lm (2000 µA/lm for the latest Omni VI Pinnacle tubes), the actual number is more like 900 µA/lm. Also called brightness gain or luminance gain. This is the number of times a night vision device amplifies light input. It is usually measured as tube gain and system gain.
Therefore, system gain is a more important measurement to the user. Pod Power Off when individually articulated.
Assembled in house with our accredited ISO 9001:2015 process and procedures. 503.5 g (17.76 oz).