Holographic sights work by using hologram technology housed in a durable construct designed for performance in extreme conditions.
What Makes a Hologram
A hologram records and reconstructs the light field that bounces off a 3-dimensional object. This is done in a way that allows depth information to be preserved. The recording also includes many viewing directions simultaneously. That way, the viewer can change perspective by moving their head.
A good analogy is the recording and playback of sound:
Holography uses a recording of the pattern of interference an object makes on light.
The reconstructed light field is so complete and accurate that the viewer cannot tell whether the 3-dimensional image he sees is live or holographic.
How a Holographic Sight Operates
The holographic sight uses laser-driven holographic technology. It constructs a 2 or 3-dimensional image of a reticle, and the laser illuminates the hologram. Then the viewer looking through the sight window can see the reticle image in the distance, at the target plane.
The reticle image can be…
Onboard Computer Controls
Holographic weapon sights (HWS) use state-of-the-art digital electronics, including an onboard microprocessor. These components give the operator precise control of the illumination laser, including…
In holography, all of the information required to reconstruct the reticle image is recorded everywhere in the heads-up display window. This is the technology that fighter pilots use for target acquisition. It creates an accurate image of a target even in poor-visibility conditions like rain, snow, darkness or cloud cover.
The heads-up display of a holographic sight provides the user with 2-eyes-open shooting. This eliminates blind spots and tunnel vision, and maximizes peripheral vision.
Durability is an important function of HWS. The sights are designed and built to be waterproof, fogproof, shockproof and temperature proof.
Even if the window is shattered or is partially obstructed by mud, snow or rain, it can still function. As long as the operator can see through any portion of the window, the entire reticle pattern remains visible on the target.
No Revealing Light Signature
All optical surfaces of the HWS are flat and have anti-reflective coatings. The coatings effectively eliminate all muzzle-side light glare that could reveal the position of the HWS. No glare elimination filters are needed.
The projected reticle is visible to only the operator. Even GEN-III night vision equipment cannot detect the muzzle-side signature of the HWS operator’s position.
Night Vision Compatible
Night vision (NV) settings are available on some EOTech holographic weapon sights. The NV button transitions the reticle to a light spectrum below what is seen by the naked eye. These sights in NV mode…
There are 20 daylight brightness settings on an EOTech HWS. In addition, the night vision mode has 10 additional distinct brightness settings that compensate for…
Just as an EOTech HWS without night vision emits no muzzle-side signature, the EOTech HWS in night vision mode is also not detectable by enemy night vision surveillance systems, making it an effective stealth system.
Typically, a monocular night vision system and the HWS are mounted in tandem on the receiver of the weapon. The holographic reticle can also be witnessed with a head-mounted or helmet-mounted monocular night vision image intensifier system. This works even with a partial cheekweld on the weapon’s stock.