This doesn't really explain much. Why does the first layer emit electrons? Why do the electrons travel backwards towards the eyepiece? How are the electrons multiplied? Why don't the electrons repel each other? It's pretty easy to understand how electrons hitting a layer cause it to emit light, but everything else is entirely arbitrary.
The first layer, the photocathode, is charged to about 1.5 kV. When a photon strikes the surface, an electron crosses the gap and enters the microchannel plate, which is also electrified. This MCP is a thin plate of glass, coated with a layer of metal. Across it are millions of tubes or holes, biased at an angle of a few degrees. When an electron enters, it bounces a number of times, each time releasing many more electrons in parallel. The result is an electron multiplication of 1,000-100,000x. Finally, the electrons strike the anode, which in case of night vision is a phosphor, which is rare earth salt crystals of a chosen size range.
@@heinrichfuhrmeister1244 ok, thanks. A electron strikes a metal in dynodes and ejects other secondary electrons from the metal by transferring some of its kinetic energy for them. Answering the 4th question from first comment.
@@lbks16 exactly. This is called a microchannel plate. I dont have a degree in physics, and im not an expert on this by any means. I just own a lot of nvg for hobby. 1. Why do the first layer emit electrons? They used a special metal called gallium arsenide. It emits electrons when hit by radiation (photons) 2. Why do electrons travel towards your eyes? The electrons are charged by your battery accelerating them. 3. How are electrons multiplied? This is the aforementioned microchannel plate. Every time electrons strike the plate,secondary electrons are produced. I don’t really know the chemical process.
Why, all the videos I've watched say the same shit but none of them have an example like " the 1st lense is pointed at a chair, the 2nd lenses turns it into clay n fires it in a kiln an the 3rd teleports that shit to your screen "
This doesn't really explain much.
Why does the first layer emit electrons?
Why do the electrons travel backwards towards the eyepiece?
How are the electrons multiplied?
Why don't the electrons repel each other?
It's pretty easy to understand how electrons hitting a layer cause it to emit light, but everything else is entirely arbitrary.
The first layer, the photocathode, is charged to about 1.5 kV. When a photon strikes the surface, an electron crosses the gap and enters the microchannel plate, which is also electrified. This MCP is a thin plate of glass, coated with a layer of metal. Across it are millions of tubes or holes, biased at an angle of a few degrees. When an electron enters, it bounces a number of times, each time releasing many more electrons in parallel. The result is an electron multiplication of 1,000-100,000x. Finally, the electrons strike the anode, which in case of night vision is a phosphor, which is rare earth salt crystals of a chosen size range.
Do I need electricity to run the night vision or it happens automatically from nature and physics?
@@lbks16you need a battery
@@heinrichfuhrmeister1244 ok, thanks. A electron strikes a metal in dynodes and ejects other secondary electrons from the metal by transferring some of its kinetic energy for them. Answering the 4th question from first comment.
@@lbks16 exactly. This is called a microchannel plate. I dont have a degree in physics, and im not an expert on this by any means. I just own a lot of nvg for hobby.
1. Why do the first layer emit electrons?
They used a special metal called gallium arsenide. It emits electrons when hit by radiation (photons)
2. Why do electrons travel towards your eyes?
The electrons are charged by your battery accelerating them.
3. How are electrons multiplied?
This is the aforementioned microchannel plate. Every time electrons strike the plate,secondary electrons are produced. I don’t really know the chemical process.
Why, all the videos I've watched say the same shit but none of them have an example like " the 1st lense is pointed at a chair, the 2nd lenses turns it into clay n fires it in a kiln an the 3rd teleports that shit to your screen "
Hello sir
You have any pdf regarding night vision topic
Cool.. now how do I build this thing?
I wish the internet was actually useful
You couldn’t build one yourself if you had a step by step guide.
@@streetDAOC Maybe not, but I'd still try. Do you have a step by step guide? I know the science behind it so far.
@@oohbootiga7649 how old are you
@@streetDAOC approximately 30, you?
@@oohbootiga7649 7