The history of night vision goggles can be traced back to the 1930s, and the earliest experiments appeared during World War II. At that time, due to military needs, both armies began to try to develop equipment that could fight at night, and night vision goggles came into being. Today, we are going to explore two modern night vision goggles: infrared night vision goggles and low-light night vision goggles.

First, let's take a look at low-light night vision goggles. Low-light night vision goggles enable us to see objects in the dark by amplifying weak light in the surrounding environment, such as starlight, moonlight, etc. Its imaging principle mainly relies on photomultiplier tubes or image intensifiers to convert weak light signals into visible images.

However, low-light night vision goggles also have some disadvantages. First, it has a strong dependence on light and requires at least some natural light such as moonlight, starlight, or infrared radiation in the environment to work. In an environment with no light source at all, it cannot provide a clear image. Second, low-light night vision goggles usually have a magnifying effect, which may be advantageous in some cases, but magnification may be inconvenient when a wide field of view is required. In addition, low-light night vision goggles are very sensitive to sudden strong light such as car lights, flashlights, etc., which may cause momentary blindness or equipment damage. Finally, an excellent original low-light night vision goggles are expensive for ordinary players.

Next, let's talk about infrared night vision goggles. Infrared night vision goggles do not rely on ambient light, but form images by detecting infrared radiation emitted by objects. Its working principle is to collect infrared radiation using infrared detectors and generate images through signal processing circuits, allowing us to observe objects in a completely dark environment.

However, infrared night vision goggles also have some disadvantages. First, the power consumption of infrared night vision goggles, especially for active infrared night vision goggles, emitting infrared light consumes more energy, which may shorten battery life or require a larger power supply when used for a long time. Secondly, although the infrared light emitted by active infrared night vision goggles is invisible to the human eye, it may be captured by other infrared, thereby exposing the user's position. Finally, heat sources in the environment may cause interference and affect the accuracy of infrared night vision goggles.

To sum up, low-light night vision goggles and infrared night vision goggles each have their own advantages. Low-light night vision goggles rely more on natural light, while active and passive infrared night vision goggles rely more on IR fill light and infrared radiation in the environment. Which night vision goggles to choose depends on your specific needs and usage environment.