Toad lens uses flat translucent lens, which is relatively easier to make in the model of the lens, and there is no need to grind out the concave and convex surfaces of specific requirements according to various powers, flashes and other requirements, which is enough to meet the requirements of the manufacturing process with the existing technology.

Regarding this point, Liu Sanshi has figured it out after being instructed, and finally gritted his teeth and decided to do a vote, isn't it just overtime, what a big deal!

"Okay, just do as you say, the two of us stayed and worked overtime at night to see if we could make the lenses, I will first go to roughly determine the shape of the lenses, now there is no physical object, only roughly do the shape, and test whether the process route is feasible." ”

To make PMMA lenses, you need to use a special mold, which is very different from traditional silicate lenses, silicate optical lenses are directly ground with finished glass, after all, not all optical stores have the ability to manufacture optical glass.

The mold in the laboratory state does not need to be reused for a long time, so it is relatively simple to make it, and the laboratory mold manufacturing technology of this PMMA translucent parts is still taken from the translucent factory, and it is very good to use now.

Liu Sanshi decided to make a mold, hurriedly cleaned up, and went to the side to work, leaving Wang Zhengguo alone at the scene, put the vial of chemical dyes he brought in the cabinet in the laboratory, and came to the professor who was watching the analysis of the experimental data.

"Professor, I'll work overtime with Liu Sanshi at night to do a dyeing experiment on PMMA materials, is this okay?"

Although the laboratory has always been open to Wang Zhengguo and Liu Sanshi, but this time it is private work after all, Wang Zhengguo is still careful, and he will report in advance to explain, he believes that the professor will not object after listening to it, this is his judgment after fully understanding the professor.

The professor who doesn't say much is indeed as he guessed, he still trusts Wang Zhengguo very much, and it generally doesn't matter if he uses the laboratory to do some experiments or something, but he is very interested in the idea of dyeing this PMMA material.

"Okay, you can pay attention to your own safety at night, and let Liu Sanshi make detailed records of the relevant records, and see what the situation of your dyeing is tomorrow, I am a little interested, in the future, PMMA will sooner or later be large-scale civilian, and it will undoubtedly be another help to expand the scope of use of the material." ”

Now the professor is doing the optical lens project of PMMA material, and he has a great interest in this material, and it is normal to pay more attention to it.

After getting the approval, there is no need to say more: "Professor, don't worry, I know all this, when you come tomorrow, I promise to put the experiment process and the finished product on your desk, and it will definitely not be bad." ”

......

"Come on, I'm going to add dye, just add 1.5 percent this time, it should be too much added before, and the whole lens is dyed to the point that there is no light transmittance, absolutely not. ”

It was completely dark outside the laboratory, but the room was brightly lit, and the PMMA material particles in the molten crucible had been completely melted into the stock solution, which was the third trial production, and the first two times were due to the addition of too much dye, which eventually led to the lens being red, completely opaque, or extremely low light transmittance.

So this time, the two of them were ruthless, and directly reduced the proportion of dyes to a large extent, from four percent to one point and five percent, hoping to make the dyed lenses have a certain color at the same time, and at the same time, they will not absorb too much light, which will lead to the problem of light transmittance.

Wang Zhengguo carefully poured the measured dye into the crucible and stirred it evenly clockwise with a glass rod, while Liu Sanshi made final adjustments to the lens mold to ensure that it would not leak when it was used.

After stirring for about half a minute, I saw that the original solution had been thoroughly dyed evenly, and then I carefully stopped stirring and reminded the mold to do the final test.

"Okay, I think the color should be about the same this time, you let me, I poured it into the mold, I feel that this time it will definitely be done, although the color of the first two dyes is too dark, but at least it proves that our stock solution dyeing technology route is no problem, the dyeing is still very uniform, and it will not fade and change color. ”

Hold the crucible with a crucible clamp that exudes high temperature, pour the dyed PMMA material stock solution into the finished mold, and the amount of melted stock solution is calculated, just enough for six lenses. After pouring, carefully put the crucible aside, ready for the final cleaning, PMMA is a very typical resin material, after solidification at room temperature, it will stick to the inner wall of the crucible, and it is not very easy to handle, so it should be cleaned in time.

These are the basic requirements of laboratory operations, which have already been completed skillfully, and after the cleaning is completed, the dyed PMMA lenses in the actual mold have also been cooled, and the cooling and solidification speed of the resin material is usually very fast, so there is no need to worry.

Liu Sanshi, who was in charge of the mold operation, had carefully opened the first set of molds, which happened to be a pair of lenses, one on the left and one on the left, and the lenses taken out had been placed on the operating table. Putting on gloves and picking up a piece, I was pleasantly surprised to find that the light transmission effect of the lens this time was acceptable, and then I looked at the color of the lens, a faint red color seemed to float on the lens, which was simply impeccable and indescribable.

"It's done, it's done! Zhengguo, let's really do it, this time the lens effect is very good, both the appearance of the red floating on the lens, and can meet the basic light transmission requirements, but I don't know what the color of the genuine toad mirror is, if there is a genuine product, we can continue to optimize the proportion of dyes in comparison. ”

Although the lens has been made, it can barely be regarded as able to meet the requirements of use, but people are always not satisfied, Liu Sanshi always thinks about whether he can optimize the proportion, so as to achieve a more scientific and reasonable color depth, and now the genuine toad lens that has been finalized and put on sale is naturally a good reference object.

After cleaning up the test equipment, I heard that the new lens could meet the requirements of use, which was also two or three steps to the side of the operating table, and after putting on gloves, I picked up another lens, and saw that the appearance was indeed very good, and the red feeling was just right.

Of course, it is also possible that because it is night, the light is provided by the light, so there will be a certain color deviation, but even if there is a deviation, it should not be too big, and it is temporarily acceptable, after all, this is only a preliminary experiment.

After careful scrutiny, I put the lens in front of my eyes to make glasses, through the lens you can see that there is a little red feeling around, but it is not too serious, it is completely acceptable, but I don't know what it will feel after wearing it for a long time, this still needs to be tested continuously.

"Yes, I think this lens should be able to meet my requirements for samples for the time being, and we will slowly refine the detailed proportioning plan in the future. Sanshi, you quickly take out the other two lenses, let's hurry up, and make a sample of the two crucibles, and I will find someone to assemble it in a few days, and I will definitely give you a whole pair to try when the time comes, and go out to definitely pull the wind. ”

The lenses have roughly been able to meet the requirements, and the lenses for two crucibles are a total of nine pairs, and after taking into account the scrap rate of the lens mold, the scrap rate of edge cleaning, and the scrap rate of coating, it is good to have five or six pairs of finished lenses in the laboratory state.