Compared with silicate lenses with a more stable molecular structure, PMMA lenses are more likely to age, especially after prolonged sun exposure, which will accelerate the aging process, thereby reducing the service life of spectacle lenses and allowing the lenses to enter the end-of-life stage in advance, which is the conclusion reached by Mie after in-depth research on PMMA materials.

After all, it can be regarded as a new material, and it has not been applied to spectacle lenses in China before, so there is naturally no relevant in-depth research.

In addition, the cockpit cover of the fighter jet, in addition to the cockpit cover will be exposed to the sun during the take-off mission, the rest of the time is covered with a protective cover, the flight life of a fighter is only a few thousand hours, and it is really necessary to wait until the cockpit canopy begins to turn yellow, in fact, the fighter has just reached the end of its life.

On the whole, the cockpit canopy is exposed to the sun for thousands of hours, and it is usually carefully maintained, which of course can be used for a long time, but glasses are different, its use environment is changeable, mainly according to the user's life rules to determine, but no matter what, a pair of glasses can not be scrapped after only a few thousand hours of use.

This is specific to different use situations, the same material to face different problems, the Republic of PMMA material is introduced from the Soviet Union mature technology, so the various performance testing and mastery of the material is not perfect, in the absence of too much necessity, who will have nothing to do to test the life of PMMA material and what is the relationship between sun exposure.

The UK side is different, their PMMA material is a product after a formal scientific research process, all kinds of test data are very clear, perfect, although at the beginning may not pay attention to the lighting data, but as long as the material is used in the process of problems, it can immediately turn back to find the cause of the problem according to the original data.

People have complete information, so they can naturally solve the problem quickly, but the domestic PMMA material R&D and testing data is not complete, who would have thought that the material still has these hidden problems.

This is the difference between a product that has gone through the whole process of independent development and a finished product that directly introduces technology, so that people can not only know what it is, but also why it is so, and even know more seemingly insignificant information.

On the other hand, it is absolutely difficult to modify the design and application if you don't know why you directly introduce mature product technology.

"Modify the original design to be cautious" This is 30 years later, the military fan circle often used to satirize the words of a certain flight design institute in the northeast, although it sounds very harsh, but there is indeed a certain truth in putting this in a specific environment, there is no original data, I don't know why, who dares to modify it indiscriminately? If it is nonsense, then something big will happen, even if the second-generation aircraft such as the Jian-7 has been changed by various magic, it is also the introduction of the Jian-7 fighter for more than 20 years, and it can only be done after thoroughly understanding the design.

Now Wang Zhengguo understands the way of the scientific research and design industry, and he knows very well that even if the PMMA material technology of the British Sanzhong Company is introduced this time, if you don't make great efforts honestly in the later stage, it is impossible to improve it again.

It seems that if you want to gain a firm foothold in the optical industry in the future, then wait until Shuhang breathes a sigh of relief, even if you smash the pot and sell iron, you must quickly invest in the research and development of the next generation of light-transmitting materials, perhaps you should pay attention to PC materials.

Although the current PMMA can meet the requirements of lens use, Wang Zhengguo knows that the optical lens materials after 30 years, the market is more used in PC materials, although it is not clear what has been experienced in this, but since PC materials can become the general trend of the future, there must be a reason, honestly follow the historical trend, this is accurate.

In addition, the future military goggles have very extreme requirements in terms of impact resistance, which PC is ultimately better than PMMA, even if it is now introduced from the UK bulletproof PMMA material, it is only more bulletproof than the traditional PMMA material, but there is still a gap compared with PC.

In addition, Wang Zhengguo also privately took over the next-generation military fighter cockpit canopy project at Mr. Wen's side, which is also something that must be made using PC materials, which is really no choice, it can only use PC materials.

Considering various factors, even if the new PMMA material is introduced now to temporarily meet the product use requirements of Shuhang, but this technology is not developed by itself after all, and it is not known why, so it is the right sustainable scientific research path to quickly lay out the development of the next generation of light-transmitting materials.

I have silently made up my mind that no matter whether the country has invested in this area or not, we should indeed take out enough funds from the scientific research fund to invest in the development of PC materials.

Wang Zhengguo silently made up his mind on the side, and the situation in the laboratory was already in full swing, after John briefly explained the reasons for the yellowing of PMMA materials, he went on to talk about specific solutions, which is now the highlight.

"Exposure to the sun will cause the lens to accelerate aging, which is due to high temperature, but more because of ultraviolet radiation, so our solution to the problem is the use of anti-ultraviolet coating technology, through the use of this technology, it can significantly delay the aging time of the material, optimistic estimates, if you plan to make spectacle lenses, it will be no problem to use it for about two years. ”

Back and forth for a long time, it turned out that as long as the problem can be solved through the anti-ultraviolet coating, the professor finally fell a big stone in his heart, after all, this anti-ultraviolet coating technology has long been developed in the laboratory, just a few days ago the results, the original plan was intended to be used in the production of toad lenses, I didn't expect that the white light lens also has to use this technology, now I think about it is really lucky, the problem is no longer to worry.

After solving the biggest problem, the professor was quite happy in his heart, and immediately beckoned Liu Sanshi next to him: "Sanshi heard it, when the time comes, we will use anti-ultraviolet coating technology to solve the problem of material aging, and you will prepare it immediately after you come down, and you will be responsible for the test work in this area tomorrow." ”

The technology is ready-made in the laboratory, and there is almost no need to do any more research and investment, just a layer of coating technology can solve the problem, I didn't expect it to bother you for so long, and then look back, it is really embarrassing.

"Ultraviolet coating can solve the problem, but it can only guarantee a service life of about two years, can it be improved?"

A pair of PMMA glasses only has a lifespan of about two years, which is too big compared with the life cycle of silicate lenses, although the health of people's eyes is constantly changing, a pair of glasses should be replaced after about two years, which is also a more suitable time point for medical advice.

But Professor Liu subconsciously wanted to try if he could improve the service life, after all, there are some special adults whose myopia has been fixed, and it is not impossible to use a pair of glasses for three to four years.