On Monday, Miao Dazhuang and they returned to the company, the school in Ganshan Village, and the small canning factory, he had already arranged for professionals to go through the procedures, and as soon as the procedures were completed, the construction could be carried out immediately, and since then, Miao Dazhuang has obtained 102 civilization points in Ganshan Village, plus the civilization points earned by two days of random tasks and other methods, and he has earned 189.8 civilization points in these two days alone.

Why is there 0.8 civilization points, this is because Yu Miaoxue also earned 102 civilization points in Ganshan Village, and in addition to the two days of following Miao Dazhuang to do good deeds, a total of 118 civilization points were obtained, providing Miao Dazhuang with 11.8 civilization points, at this time, the civilization medal on Yu Miaoxue's chest, the number under the mysterious starry sky is not 0 but 215, since Yu Miaoxue brought the civilization medal, every day as long as she is free, she will go out with Miao Dazhuang to do good deeds, so her civilization value has been as high as 215 points.

Miao Dazhuang was browsing the Civilization Mall, and he now had a total of 896.9 Civilization points, so he was ready to exchange for another technology.

Because there is not much civilization value left, I can only salivate and look at those super technology Miao Dazhuang in the civilization mall.

Military technology is of no use to him now, and he can't touch it casually, so he doesn't think about it.

"Primary Human Development Technology" and "Primary Human Life Extension Technology" are two good technologies, but if the drugs or technologies that generally act on the human body want to be used on the human body, they must go through a large number of live experiments to confirm that there is no problem, and the state will allow them to be used on the human body, so it is too troublesome, and it is not the technology he wants now.

Miao Dazhuang continued to rummage through page by page, and when he saw "Holographic Projection Technology", his eyes couldn't help but light up.

Holographic projection technology, also known as virtual imaging technology, is a technology that uses the principle of interference and diffraction to record and reproduce the real three-dimensional image of an object.

The first step is to use the principle of interferometry to record the light wave information of the object, which is the shooting process: the object is irradiated by the laser to form a diffuse object beam.

The other part of the laser is used as a reference beam to shoot on the holographic negative, which is superimposed with the object beam to produce interference, and converts the phase and amplitude of each point on the object light wave into the intensity of spatial variation, so as to record all the information of the object light wave by using the contrast and spacing between the interference fringes. The negative that records the interference fringes becomes a hologram, or hologram, after being developed and fixed.

The second step is to reproduce the light wave information of the object using the principle of diffraction, which is the imaging process.

A hologram is like a complex grating, and under coherent laser irradiation, the diffracted light waves of a linearly recorded sinusoidal hologram can generally give two images, namely the original image (also known as the initial image) and the conjugated image. The reproduced image has a strong sense of three-dimensionality and has a realistic visual effect.

Each part of the hologram records the light information of each point on the object, so in principle, each part of it can reproduce the entire image of the original object, and through multiple exposures, multiple different images can be recorded on the same negative, and they can be displayed separately without interfering with each other.

Everyone has two eyes, and the angle of view of each eye is about 80 degrees, but the angle of view of the two eyes together is only 120 degrees, which means that the angle of view of 40 degrees coincides.

So what our left and right eyes see is actually different, for example, if you close your left eye and look with your right eye or vice versa, you can test the effect, and the object received by the left and right eyes is forwarded to the brain to judge the distance of the object in order to form a three-dimensional sense. 3D stereoscopic technology is formed by simulating this process.

Before the 3D projection, the object is photographed in 3D at 120°. Readers who have watched 3D movies should know that if you take off your 3D glasses and watch them, the picture will be ghosted and blurry. It's just that the picture on the screen is not one, but the superposition effect of two pictures with different angles.

In order to simulate the "binocular effect", it is necessary to shoot a left-side image and a right-side image. When shooting, there are actually two 3D cameras working at the same time, one is biased to the left of the actor to record the left-side image; One is biased to the right side of the actor, recording the image on the right, and then superimposing the two images through computer processing to become a 3D movie source.

After the completion of the shooting, in the screening room, the 3D film source is projected on the screen at a certain angle, and the audience needs to wear 3D glasses to watch. If you look closely at the 3D glasses, you will see that there are dense and fine stripes on the left and right lenses facing different directions. The left lens is longitudinal and the right lens is horizontal. It is these stripes that make it possible to see a wonderful 3D stereogram.

Holographic projection technology also needs to decompose the image according to the "binocular effect", so that the left eye can only see the left picture, and the right eye only sees the right side of the picture, so that the brain can produce a three-dimensional sense of judgment from far and near.

Although the color picture is the same, the propagation direction of the light used for projection is different, the left picture uses longitudinal wave light (light waves are transmitted along the longitudinal direction), and the right picture uses transverse wave light (light waves are transmitted along the transverse direction), due to the characteristics of polarized light, the longitudinal wave light can only pass through the longitudinal lines, not through the horizontal lines, therefore, through the left lens, only the left side of the picture can be seen, the same is true with the right lens.

As a result, the overlapping images are broken down, and the left eye sees only the left-side picture, and the right eye only sees the right-side picture, resulting in a sense of distance and three-dimensionality due to the binocular effect.

Gu Miao Dazhuang learned about holographic projection technology in 1947, when Hungarian physicist Dennis Garber invented holographic projection, for which he won the Nobel Prize in Physics in 1971.

Other scientists have done some research work before and solved some technical problems. The invention of holographic projection was discovered by chance while Gable was researching a means to enhance the performance of electron microscopes at BTH in London, and the technology was patented by the company in December 1947.

This technology has been used in electron microscopy since its invention, and it is called electron holographic projection technology in this field, but it was not until the invention of the laser in 1960 that holographic projection technology made substantial progress.

Since then, holographic projection technology has begun to flourish, and the key reason for the boom in holographic projection in a short period of time is the mass production of low-cost solid-state lasers, such as those used in DVD players and other commonly used equipment.

These lasers have also greatly contributed to the development of holographic projection. These inexpensive and small solid-state lasers can compete under certain conditions with the large, expensive gas lasers originally used for holographic projection, thus making holographic projection research accessible to researchers, artists, and even hobbyists on a lower budget.

It is often seen in science fiction movies that a three-dimensional holographic communication technology can project distant people or objects in the air in a three-dimensional form, just like the scene in the movie "Star Wars". In addition, with the development of science, all devices are miniaturized and sophisticated, but display devices cannot match them, and human beings increasingly need a new display technology to solve problems.

The current 3D projection technology is semi-mature, so it is not enough to achieve the effect in the movie "Star Wars".

The holographic projection technology in the Civilization Mall only needs one chip to project an acceptable three-dimensional holographic image, but as long as the number of chips is increased, it can project a more complex three-dimensional object with more detailed details, and it is not a problem to achieve the 3D effect in Star Wars according to the effect introduced by the system.

At the same time, a start-up company in California, Federal State, is also developing a three-dimensional holographic projection chip, and has already had preliminary results, they have developed the first chip, but currently can only complete the holographic projection of two-dimensional images. Therefore, the research and development of this chip and technology is still in the initial stage, and if Miao Dazhuang exchanges this technology, then he will overtake in the corner again.

Although he is very excited about this technology, Miao Dazhuang is not ready to exchange for this technology at present, not that he can't afford it.

"Holographic Projection Technology" only needs 500 civilization points, and the reason for not changing it is very simple, because this technology requires the use of chips.

Although he didn't exchange for this technology, Miao Dazhuang already knew the technology he needed, and directly entered the chip technology in the search bar of the mall, and the dense chip technology couldn't help but dazzle him.

These technologies, there are outdated technologies, and there are also very advanced technologies, such as "Superconducting Chip Technology", which makes Miao Dazhuang's saliva flow, but the civilization value required by this technology is too high, and he can't afford to change it at present, even if he exchanges it, it is useless, because superconducting chips need to use room temperature superconducting materials, which are materials with almost zero resistance at room temperature, and they are also super materials that have been explored by the world's most cutting-edge laboratories.

Miao Dazhuang took a look at the "Normal Temperature Superconducting Material Technology" requires a civilization value of 10,000, gave up decisively, continued to browse the chip technology, and screened for a long time, and finally Miao Dazhuang was undecided in the two items of "Lithography Machine Technology" and "Graphene Chip Technology".

"Lithography Machine Technology" requires a civilization value of 500, and the minimum can process 2nm silicon-based chips, you must know that the world's most advanced lithography machine technology is 5nm silicon-based chips, which need to be manufactured by extreme ultraviolet (EUV) lithography machines. So Miao Dazhuang is very excited about this technology.

"Graphene chip technology" requires a civilization value of 1200, mainly using arc discharge method and laser ablation method to make carbon-based chips, which does not require the participation of lithography machines at all, and the performance of the carbon-based chips manufactured is more than ten times higher than that of silicon-based chips with the same process.

Miao Dazhuang wants this technology very much, but his civilization value is not enough, if he wants to exchange for this technology, Miao Dazhuang will need at least ten days to do tasks and do good deeds.

Therefore, in the face of the two technologies, Miao Dazhuang was a little undecided, and after thinking about it again and again, Miao Dazhuang gritted his teeth and decisively chose "Graphene Chip Technology".

Because even if he exchanges ordinary silicon-based chip technology, although it will be more advanced than Western countries, but the effect is not great, the current mainstream chips in the world are 14nm chips, although 2nm is very attractive, but carbon-based chips are even more attractive, and its performance has killed silicon-based chips.

Miao Dazhuang, who was still studying at the time, was indignant about this, but it was useless, since he has the ability now, of course he has to do what he wanted to do back then.