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What is the difference between Red dot sight and Holographic sight?

2021-09-22

A red dot sight is also called an inner red dot sight.  Many people often mistake red dots for the red dots that snipers shoot at their targets in the movies.  It's actually a laser scope, a real red dot scope, that just reflects the red dot in the scope.  It's based on the reflex sight, which was invented in 1900.  A reflective sight is a light source that reflects through a mirror, forming a virtual image of infinite distance in the eyes of the person, and then combining it with the observed target to aim.  Because it's a virtual image at an infinite distance, the sight will lock onto the target no matter how the human eye shifts.  This largely eliminates the parallax caused by the shaking when aiming.  It can also greatly improve its ability to move, or to catch objects moving at high speed.  After the invention of reflex sights, they soon became popular in war.  In both World Wars, it was used in fighters, bombers, anti-aircraft guns and anti-tank weapons .


Holographic sight, like red dots, are commonly used in close combat.  In games, though, the difference is not so obvious.  But in fact, holographic scopes are much more complex than red dots.  The laser emitted by the laser is divided into two beams, one of which is collimated into parallel light through the lens array and directly irradiates to the holographic photographic plate as a reference light.  The other beam, after passing through the bracket beam, will be illuminated on the splitter plate as illumination light, and then through the transparent part of the splitter plate, the parallel light corrected by the lens will be illuminated on the holographic photographic plate.  Simply put, the screen of a holographic scope is a hologram. It is also because of its special imaging principle, so that holographic has many advantages that red dot does not have.  Some red dot sights, for example, lose their brightness and clarity when exposed to the sun, making it impossible to see effectively.  But holoscopes that use high-brightness lasers as a source of light, whether in bright light or indoors, are not too affected.  I'm sure you've all seen this in PUBG.  

Compared with red dots, holographic sights can further reduce parallax.  And each spot on the hologram records light information.  In theory, even if the lens gets muddy or even cracked, the holoscope can use the remaining part to restore information and maintain normal use.  Greatly improved the soldiers in the complex battlefield error tolerance.  Holographic mirror also relies on these advantages, has been widely used in the world's special forces.  Especially in Africa, the Middle East and other harsh environment, equipment rate is higher than the red dot, of course, the price.

Holographic sight

 


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