Military Technology

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In fact, cameras, cameras or optical imaging equipment can be regarded as electronic glasses or optical glasses, which have the same imaging principle as glasses.

But so far, we have not been able to create imaging equipment that exceeds the imaging quality of our human eyes.

In fact, the imaging quality of our human eyes is very average in nature, just like we describe a person's eyes as good, saying that he has a pair of eagle's eyes.

In nature, the eagle's eyes are indeed very powerful. It can see animals on land from a few kilometers away, and then swoop and accelerate to catch the animals.

Cuttlefish have the most highly evolved eyes in the animal kingdom, with oddly W-shaped pupils that cannot recognize colors but can see the polarization of light. So you can see the contrast even in dim light.

While humans are able to achieve better focus by changing the shape of the eye lens, squid can change the shape of the entire eye.

Plus, the animals' internal sensors allow them to see what's in front of them as well as what's behind them.

Especially the most famous king squid, relying on its own pair of huge eyes, can live in the deep sea of ​​thousands of meters, and can also fight whale sharks.

Butterflies (dragonflies), like many insects, have compound eyes made of hundreds of tiny hexagonal lenses that allow them to see in all directions at once.

Butterflies can also see ultraviolet light, which is invisible to the human eye, and it is this ultraviolet light that provides them with a sense of orientation and guides them to flowers with various delicious nectars.

Chameleon eyes do not have upper and lower eyelids, but instead have a cone-shaped structure just large enough to accommodate their pupils. Each cone can rotate independently, so the chameleon can actually see two separate objects in completely different directions at the same time.

This visual advantage makes them particularly good at catching fast-flying insects. In fact, frogs also have this function. They have a very keen observation ability for high-speed moving objects.

The eyes of owls are also very powerful, and they have excellent depth perception, especially in low-light environments. Therefore, it can fly at high speed in the forest at night, not only to avoid various obstacles, but also to find some prey on the ground.

From this point of view, its eyes are no worse than the ultrasonic waves of bats.

We humans have always been good students of nature,

Constantly learning the rich knowledge contained in nature. Also by imitating the special functions of these various animal eyes, we have also developed various optical imaging devices through bionics.

For example, with a telephoto lens, you can see the stage from a long distance. Some advanced military optical reconnaissance satellites can clearly see the license plates of cars on the ground from hundreds of kilometers in space.

For example, high-speed cameras, through which we can see bullets and shells flying at high speed, and even scientists have developed ultra-high-speed cameras that can clearly see the trajectory of light movement.

Scientists at the University of California in the United States have developed an ultra-high-speed camera that can take 6.1 million photos in one second, with a shutter speed of up to 440 trillionths of a second. Scientists are trying to use such an ultra-high-speed camera to solve many scientific research problems.

Another example is night vision devices, infrared cameras, etc. Night vision devices can see the target clearly in the dark night, and the current full-color night vision devices can even display colors. Infrared thermal imaging can clearly see the temperature emitted by various stages, and is widely used in various fields.

As for compound eyes, in fact, scientists have also used this as inspiration to develop many compound eye technologies.

It may be unfamiliar to everyone, but in fact we have all used this technology. The current multi-camera imaging technology on smartphones actually uses this technical principle. The pictures taken by multiple cameras are combined to form a higher-quality photo.

Not only that, but the composite photos taken by multiple cameras have higher pixels. Compound eyes, however, offer a distinct advantage in that they can produce a panoramic perspective and a remarkable sense of depth.

As there are more and more cameras with various functions on mobile phones or mobile devices, some people worry that one day the back of the mobile phone will be completely occupied by cameras.

So the experts are wondering if there is a technology that can replace so many cameras, so that one camera can do what multiple, or even tens or hundreds of cameras can do.

So the compound eye technology has once again attracted the attention of technical experts, but how to bionic the compound eyes on insects has become a topic that everyone is studying.

The research project of the Optical Imaging Technology Laboratory is compound eye integrated lens technology. Simply put, this project is to study the compound eye lens. How to integrate multiple cameras into one lens so that this lens has different functions of other lenses.

In the final analysis, it is still on the lens, and on the lens, the lens is the key among the keys. How to design and manufacture these lenses so that they can achieve various functions is also the main problem faced by the research team.

At the beginning, the direction of the project research team was mainly to concentrate all the lenses of these different cameras into one lens. To put it simply, multiple lenses share one photosensitive element. This technology has actually existed for a long time. As early as the film era, there were already multi-lens cameras.

It’s just that the multi-lens at that time was only one or two, two or three lenses, and what the project research team had to do was to gather more lenses, seven or eight, or even a dozen lenses.

This increases the difficulty of the subject. How to make these dozens of lenses share a limited-area photosensitive element is a thorny problem.

In fact, in the past, technicians also developed so-called compound eye cameras for bionic compound eyes. It arranges countless cameras in a hemispherical array according to the eyes of dragonflies or butterflies, thus forming a compound eye camera similar to the shape of insect compound eyes.

Then the photos taken by these cameras are synthesized through a special algorithm, so a photo taken by a compound eye camera is obtained.

But this is too troublesome. Each camera in this compound eye camera is a complete individual, and the combination is too complicated and the cost is too high.

Of course, Wu Hao and the others would not like this kind of technology. What they have to do is to greatly simplify the structure. The first thing to do is to concentrate the images imaged by all the lenses in the compound eye on one photosensitive element, which greatly reduces the structure of the compound eye camera.

But how to concentrate the images imaged by these lenses on a photosensitive element is a problem.

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