Good to see you too Victor.
More myths to debunk:
10,000 Hours MTBF in Gen 3: It is exactly what it says. This myth has more to do with the definition of MTBF (Mean Time Between Failure). Many people misunderstood this definition as 10,000 hours and your tube will die.
This is absolutely false. Your tube
may have life more or less than 10,000 hours. Let's examine the definition - Mean (aka average) time between failure. What this means is that they take a batch of Gen 3 tubes (hopefully enough statistical sample, at least 30) and run them until the tubes are dead. Basically,
the average time that these tubes go bad is 10,000 hours. People always asked how many hours on the tube? The question is
almost pointless. People think oh, it's got 1000 hours, therefore 9000 hours left. This is completely false. It's like buying a car with 50,000 miles on it - Do you know when that car is going to die? No, better question is how did you take care of it.
FLIR VS I2 - I will be very reserved about this topic as this is a free access forum (hence, anyone in the world can log on and see this).
I^2 works in visible (VIS) light arena, which works off
reflection of light. It may sounds stupid, but it is an important concept to grasp. It works by
amplifying the input light. The photocathode (PC) is the photon (light) to electron converter. Gen 3 has GaAs (as those in the industry pronounce this "gas", Gallium Arsenide) photocathode. After PC, the Microchannel plate (MCP) amplifies the number of input electrons. The phosphor screen is after the MCP, which its function is to display. Different phosphor deposit gives different tone of color. Beyond that is the fiber optics, which may or may not invert the image (hence they specify inverting or non-inverting tube).
FLIR (thermal) works of
emission of heat and detecting the temperature difference. Its bands are Short, Mid, and Long wave Infrared - SWIR, MWIR, and LWIR respectively. The bands are limited due to atmospheric transmission and absoprtion and not because of semiconductor cannot be doped to work in the range between - what's the point of making a receiver that your atmosphere won't transmit. The heat
emission is another hard concept to grasp. People think since foil reflects light, it will reflect heat. Heat conducts, emits, and radiates. So if you were to put a foil blanket over you, eventually the foil will reach the same temperature as your body heat - you will be visible to FLIR within seconds.