When fighting in low-light environments or seeing targets clearly, most people will choose monocular night vision goggles such as PVS-14 or binocular monocular night vision goggles such as PVS 7. If the budget is more abundant, binocular night vision goggles can be used.

This type of night vision goggles contains two image intensification tubes, so that the binocular vision can be superimposed, so as to obtain a stereoscopic image field of view. Binocular night vision goggles can provide better night vision field of view, but they cannot increase the size of the field of view. In order to obtain a better night vision experience and a wider night vision field of view than binocular night vision, this involves the protagonist of this article: panoramic night vision goggles, which are often called four-eye night vision goggles.

We are uneducated people who just like four-eyes

Panoramic Night Vision Goggles (PNVG) Conventional night vision goggles, whether monocular or binocular, can only provide a 40° field of view. Because the night vision image of binocular night vision will be synthesized by the human eye in actual use. Therefore, the human eye will only see one night vision image, so it does not increase the night vision field.

Panoramic night vision goggles can basically be regarded as a set of binocular night vision goggles, but there is an extra set of lens barrels on both sides. Therefore, some people think that they can hold two monocular telescopes next to the conventional binocular night vision goggles to simulate the effect of panoramic night vision. But in fact, this cannot simulate its effect very well.

Simulating the effect of panoramic night vision. In this picture, the user perfectly missed the exit pupil distance of the pvs-14 on the left. The pvs-14 is too close to the shooter's eyes. Since the user can only get a 40° main night vision field, plus the two telescopes attached to the side, the field of view below will be formed.

But in fact, the field of view of panoramic night vision goggles is not separated. In order to obtain a coherent field of view, the structure of panoramic night vision goggles is quite compact, and a small part of the two eyepieces is cut off and the two eyepieces are placed closely together, so that the two night vision fields are merged. This method is called eyepiece fusion.