What is the principle of holographic sight?

The light emitted by the target enters the human eye through the beam splitter, and the human eye sees the real image of the target. The light irradiated by the illumination system on the reticle is transmitted to the concave surface of the beam splitter, and then the concave surface reflects these light rays into parallel light and enters the human eye. The human eye can't identify the real position of the reticle at this time, but can only see its virtual image, that is, the red dot, and think that this image is at infinity.

The virtual image of the reticle can be superimposed with the real image of the target seen by human eyes for aiming. And because the parallel light reflected by the concave surface of the beam splitter enters the human eye, the human eye can see the virtual image in any direction.

Extended data

The starting point of sight

In the11940s, some American gun mechanics began to manufacture guns with optical aiming devices. During the period of 1848, Morgan James of new york designed a tubular aiming device with the same length as the barrel. The second half of the device is equipped with a glass lens and two crosshairs for aiming. Later, similar aiming devices were used in the American Civil War.

But the sight with real practical value was born in 1904, which was developed by German carl zeiss and used in the First World War. World War II, the horizon began to mature.

Baidu encyclopedia-line of sight

Baidu encyclopedia-holographic sight