As we all know, night vision devices are devices used at night, and their functions are of course to help them see the surrounding environment with the naked eye in a dark environment.

However, according to the formal classification method, night vision devices are divided into two types.

That is, "active infrared night vision instrument" and "passive infrared night vision instrument". "Active infrared night vision instrument" includes "starlight night vision instrument", which is commonly known as "glimmer night vision instrument", and night vision instruments with ir function, that is, night vision instruments that emit infrared rays. Currently, almost all active infrared night vision instruments in the world have low light and ir functions, and even the oldest first generation night vision instruments have these functions.

Another type of "passive infrared night vision device" is what we commonly call "infrared thermal imager".

The difference between the two night vision instruments is that the active type is to illuminate the starlight from nature onto the object, then reflect it to the objective lens, or illuminate the object through the ir of the night vision instrument itself, then reflect the infrared light onto the objective lens of the night vision instrument, and then see the imaging through the image enhancement tube in the night vision instrument. This type of night vision instrument is used on individual soldiers.

Passive night vision devices are imaged through infrared radiation emitted by the object itself. The frequency used on individual soldiers is much smaller because the cost is too high.

At this time, the one placed in the black box was the previous generation of night vision instrument - anpvs14.

This thing is a regular ground force night vision device of the US Imperial Army and the 6th Navy Corps. It is very light and compact, can adjust the gain, and has the strongest scalability. It is the most common US night vision device on the market.

The advantage of this night vision device is that it can be worn on the head or mounted on a rifle as a night vision sight. It is very convenient to carry and is a very practical product.

But although this thing is the most common on the market, it is quite difficult to get it!

Because this game is from the United States! from the United States! from the United States! from the United States! and from the military!

It takes three important things. Because this thing is a military product of the US imperialists, it is quite difficult to get it through formal channels.

The price of those anpvs14 single-cylinder night vision devices that are sold on the trading platform of military products enthusiasts are 30,000 to 40,000 or 50,000 to 60,000, but they are not reliable because most of them are commercial versions, and the practical effect is several levels worse than that of military versions.

So although this is the previous generation of products, the military version is still a rare product that is hard to see.

But at this time, Wang Ce actually took it out, and he took more than a dozen!

"Damn, I think you need to re-evaluate. You can actually get such rare things. I'm really bad. Do you want to move out an anti-tank bazooka and other things next?"

Lin Feng picked up anpvs14 from the box and watched it happily as if he was treating some treasure.

"Hey, I am not very capable, but one thing is good, that is, there are many ways. Although this thing is difficult to deal with, I still asked my friend to help me get some. Although it cost a lot of money, I still think it's worth it."

Wang Ce said humbly.

"How awesome is this thing?"

The fat man also curiously took out an anpvs14 and took it in his hand to observe it carefully.

"Hey, think about it, the equipment used by the US Imperial Army, do you think it's awesome or not."

Lin Feng smiled and said, "You must know that the technology of the US imperialist in this field is definitely the world's top level. Do you know why the US imperialist international military operations have been carried out at night in recent years?"

"You are so stupid. You took out all this stuff, it must be because their night vision equipment is awesome!?"

The fat man was quite unhappy with Lin Feng's contempt and snorted in his nostrils.

"That's right, that's the reason." Lin Feng smiled and stopped paying attention to the fat man, but started playing with the instruments in his hand.

Indeed, in the Iraq War many years ago, the US military relied on excellent night vision weapons and chose to attack in the early morning. They equipped the soldiers with excellent night vision devices. At that time, Iraq's arms were backward and night vision equipment was very scarce.

"The US military is in darkness, the Iraqi army is in light." The Iraqi army was unable to use the cover of the night and suffered significant losses. Therefore, the battlefield gradually evolved into a one-sided situation.

There are also the Afghan Taliban Armed War, the Gulf War, etc., and the US military almost all started from night because they have the most advanced night vision equipment in the world.

Even now, even if Meidi makes a blockbuster movie, she will not forget to show off their night vision skills in the movie.

"Unfortunately, anpvs14 is a low-light night vision device and the effect is worse."

Wang Ce also picked up one and skillfully started to put it on his head.

"Enough! In normal times, this underground abyss should be an absolutely dark environment, and this thing will be greatly restricted. But now, if you look at the construction teams above, they almost illuminate the entire abyss. Moreover, this night vision device has infrared fill light gain, and the glimmer below should be enough for us to see the environment clearly."

Lin Feng showed joy on his face and skillfully brought the night vision device to his head.

In the next few minutes, a group of thirteen people were all equipped with this kind of night vision device, and then led by Lin Feng, drilled out of the hole one by one, and then quietly touched the depths of the ground.

Lin Feng and the others walked down, about one-fifth of the way to the bottom, and an abnormality finally occurred.

Lin Feng, who was sharp-eyed, seemed to have several figures on the nearest rest platform in front of them. So he quickly made a quiet gesture to the team behind him, and the group of people stopped immediately.

Lin Feng signaled them not to move, then put their steps to the lightest and slowly approached the platform. Until the picture that appeared in the night vision device became clear, Lin Feng felt relieved.

It turned out that the seven or eight figures were just corpses, not living creatures. However, his brows still frowned.

Because those corpses are not human, but ferocious unknown creatures.

This is not a good phenomenon, because Lin Feng has never killed so many unknown creatures here several times, which can only explain one problem.

It was just that others had gone down such a deep place.

Who is it?

It is obvious that it must be the guys who dug fossils. As for the scattered forces before or the mysterious organization that later replaced those people, it is not clear.

If it were the retail investors before, it might just come down to explore, but if it was the group of organizations later, it might be hard to say.

After all, an organization with the ability to kill six groups of people in one fell swoop should not be so short-sighted, just to dig some stones to sell money.

So Lin Feng and the others are likely to encounter each other here, and at that time, there will be a fierce battle.
Chapter completed!