Overview Of Red Dot Laser Light
On the market for many years, they have entered fully as the best red dot laser sights for small arms thanks to their weight and their reduced size as well as the ease of use in the field. The operation of these simple “sights” to refraction, is based on the ability of a concave lens to reflect part of the light that hits it mixing it with the light that passes through it, thus returning an image containing two perfectly combined images so as to make them look like one. The same thing happens when you look at a window of a store and see inside it pass the cars that instead dart behind you, the glass that is between you and the inside corrects with the light that comes from the inside also part of what it comes from outside and reflects on its surface and you appear to be one.
But let’s immediately dispel a myth, one of those urban legends that often allow many to keep prices at “stellar levels: the light emitted and therefore the image on the lens is not produced by a “laser” light as someone wants us to believe but simply by a coloured LED diode. So the light produced by this simple diode led by a few cents, passing through a very fine metal plate in which is engraved and carved the design that will then appear to the eye of the shooter, hits a small mirror that reflects on a glass (lens) that has the concave part towards the same shooter, here part of this light is reflected, it mixes with the one that comes from the front of the lens and that crosses it and everything ends in our eye: here we see all the images mixed and the red dot (or other) to us appears to come from the observed point beyond the lens, in short, from the target. How do you adjust the pointing though?
Simply by tilting the concave lens, so while the light that passes through it reaches the eye without changing, the reflected light is instead moved due to the different angle is given to the lens, this shift is perceived only for the reflected light while that of “background” remains unchanged. The light intensity of the diode is regulated by means of resistors that make it more or less luminous, so a brighter image is reflected on the lens if we increase the voltage at the diode or less if we decrease it.
A very simple idea applied to point systems, today smaller and more compact thanks to the construction techniques that allow producing in direct fusion small objects almost impossible to produce manually. The crystal lens is actually a double lens coupled, a concave first and a flat placed after, fixed in a fine aluminium frame, these are the Achilles’ heel of the collimator. A fall or a shock too strong can cause the break, as happened to us. The shotgun slammed against the wall, a bump, a fall and the breaking of the lens makes the collimator unusable and therefore to be thrown away, the occasion allowed us to “cut” one to understand which materials are used and why there are collimators dear and collimators that you can buy a few dollars.
