Truly qualified optical craftsmen or qualified optical technicians have almost a natural sense of sensitivity to the necessary skill of optometry, and Lao Zhang also thought of seeing the light transmission effect for the first time for the new plastic lenses.

Even though the whole material is faintly red because of the special needs of the lens, making people feel that the whole world is on a red background, but experienced optical technicians can see the essence through the phenomenon, and Lao Zhang can see through this layer of light red and see the real light transmission effect of PMMA material.

Tests were carried out against different light backgrounds, and even at the sky, through the lens to see the rising sun in the sky, all kinds of situations show that although the new material has its unique advantages, it is not satisfactory in the transmittance, one of the most important performance indicators of optical lenses.

"I took a general look, the light transmission effect of this lens does not seem to be very good, although the lens used to make sunglasses is acceptable, but its transparency effect is still very average, I think if it is not stained, use it to make real myopia spectacle lenses, the effect is not very good, right?"

For the PMMA lenses brought this time, Lao Zhang finally saw the problem, in fact, the PMMA material provided by the 123 factory is not suitable for precision optical lenses, although the PMMA material has a higher light transmittance than the traditional silicate lens, but this only refers to the data obtained when the material is very pure.

At present, the overall domestic PMMA material manufacturing technology is still at the level of World War II, although later when the MiG-21 fighter was localized, the performance of PMMA material was also upgraded, but it was only calculated to reach the level of the late fifties and early sixties.

In this case, the material itself is not pure enough, and it always contains some small defects, which are manifested in the finished light transmission parts, that is, the permeability is average. It is used in the large-area light transmission part of the cockpit canopy of the fighter, which naturally does not have much of a problem, after all, the sky background is very clean, even if the transmittance of the cockpit canopy is not very good, it can actually meet the combat requirements of the aircraft.

Again, what is suitable on the plane is not necessarily really suitable for optical lenses, and the PMMA material used for spectacle lenses is too close to the eyes, even if the smallest defect will be infinitely magnified, Lao Zhang, as an optical technician with many years of experience, knows this.

Wang Zhengguo, who has long proposed to use PMMA resin translucent materials to make spectacle lenses, is unlikely to be unaware of this problem, otherwise he would not have found a way to retreat first, and no longer intends to launch the use of white light lenses for the production of myopia spectacle lenses as soon as possible, but instead started colored lenses with various colors, which is because color lenses have low requirements for light transmittance, so they are acceptable.

"That's right, now our technology to make white light lenses is really not good in terms of transparency, so I don't plan to launch white light lenses, now we will do a good job of lenses with color, and in the future, after the technology is further advanced, we will launch suitable white light lenses. ”

I took out another lens in the box, just enough to make a pair of glasses with the lens in Lao Zhang's hand, the two lenses are put together, and the faint red light is revealed in the sun, compared with the finished toad lens on the side, there is not much difference between the two in appearance, as long as you don't have to worry about finding fault, the small batch of lenses brought this time is qualified.

......

"This lens is already very good in other aspects except for the light transmittance is a little inappropriate, but the biggest disadvantage of this lens now is that it does not have polarization and ultraviolet filtering functions, so I am afraid that it will only be decorative, I don't know if you can sell it when you make it." ”

In the eyes of the older generation of optical technicians, the existence of glasses is a kind of real benefit that can bring real benefits to people, and even a necessity of life, they never thought that one day glasses would become decorations and exist, because the glasses in their cognition have always existed as tools.

Now this batch of glasses is made and sold as decorations, Lao Zhang is naturally a little worried, although he does not need to bear the risk of this thing, but considering that all glasses have to pass through his hands, this alone is enough to make him worry about the future of these glasses, after all, it is his own work!

"Don't worry about this, I've done a detailed market research, and now the masses of people are very interested in this kind of toad-like glasses, as long as we make it, we will definitely be able to sell it, I'm just thinking about what channel to sell these glasses when the time comes, and the country doesn't have a clear price for this kind of thing. ”

It stands to reason that Wang Zhengguo can organize the production of this batch of glasses as a subsidiary factory of Shu University Optical Laboratory, so that he can definitely sell them through formal channels, and the glasses can be sold through major state-owned stores.

But the problem now is that Wang Zhengguo plans to make a batch of them with his own people's righteousness, and after earning the first pass in this way, he can put into large-scale production of various glasses in the later stage, so that he can have enough capital to participate in the project and strive for enough benefits for himself.

So the problem is here, if the first batch of glasses does not plan to go through the formal channel, then it will definitely not be able to go to the state-run store, the only thing Wang Zhengguo can think of is the backpackers from all over the world that have begun to appear at this time, they may be the only reliable channel for goods now.

But these backpackers are not so easy to pick up, after all, they are all gray businesses, and they are careful to do this business, plus most of the backpackers are now active in the southeast coast, and there are indeed very few inland activities in the southwest.

Originally, it was just a casual remark, even though Wang Zhengguo is still a little worried about the delivery channel, but he is not unable to solve it, it really can't be done, he can still take things to the southeast coast to find backpackers! Anyway, it is a profiteering industry, and it is nothing to pay a little fare.

Now a new situation has appeared, but Lao Zhang was reminded by Wang Zhengguo that there is no national price for glasses, and suddenly remembered that now he Lao Zhang is just a small optical technician, of course, relying on his skills to make a living, of course, the country will not care about these now, but if he participates in large-scale glasses production, he is nameless and worthless, then he will pay it back!

The more I think about it, the more dangerous I feel, I am already so old, but I can't be imprisoned when I am old, then it is really a lifetime of ruined reputation, this matter must not be!

"The sales you mentioned is your problem, and now what I'm worried about is that in my case, you can also see that opening a small shop to repair clocks and glasses in exchange for food is nothing. But if there is no national license for large-scale production of glasses, once it is found out, it will be locked up, this is not good, absolutely not!"

As soon as he said this, Lao Zhang kept shaking his head, it seems that he has a deep understanding of the power of the socialist iron fist, and he doesn't know what he has experienced back then, so he is so cautious at this time.

Suddenly encountered this kind of problem, it stumped Wang Zhengguo, if Lao Zhang said that he would not do it, then he would really have to be blind, it seems that he must find a reliable state-run skin, otherwise it will be difficult to do things wherever he goes.