Chapter 471: He Comes with Bad Kindness
Crown, it really is the crown that means coronation. Crown brand optical glass is also called crown optical glass. Don’t think that the origin of this name is the same as the "crown ether" in organic chemistry because its structural formula looks like a crown and is as tall and noble as it is.

The origin of this name should be very rustic. It is probably because early optical devices were mostly made from the bottom of wine bottles or the big bumps on flat glass. These things looked a bit like a crown.

Therefore, the optical properties of crown optical glass cannot be easily seen from its name, but later it became a convention that borosilicate glass with a dispersion parameter Abbe number greater than 50 and a refractive index of 1.5 to 1.62 is called crown glass, and the one with an Abbe number less than 50 is called flint glass, which is made of crown glass plus alumina or something.

So, to put it bluntly, crown optical glass at this time is just ordinary optical glass. Although other properties of crown glass are different, there are probably no good products available in the country at that time.

Engineer Li explained this roughly to Gao Zhendong. Gao Zhendong really didn't know these things before, but he knew one thing that Engineer Li and the others didn't know.

"Engineer Li, if there is an optical material with a 350nm wavelength, 10mm original light transmittance of 90%, and a thermal expansion coefficient of 0.2~0.5ppm/℃, would it be useful to you?"

Gao Zhendong was excited.

You are not good at materials, and I am not good at optics. Can you achieve 5μm resolution? Comrades, please!
Gao Zhendong recalled a famous joke from the transport captain in his previous life.

"How much? How much?" Mr. Li could not believe his ears. If I had this thing, why would I complain to you? I can rub a few sets out for you just by rubbing it with my hands.

Gao Zhendong repeated his words and added: "I don't know much about other optical properties and haven't tested them, but I have tested that the refractive index is about 1.5 and the Abbe number is less than 70."

Engineer Li was delighted. The optical performance was just the same as that of crown glass. There was no need to make major changes to the optical system. He could get it almost exactly the same.

"Chief Engineer Gao, if you can really give me this glass, I can at least give you a resolution of 5μm!" He was also very clear. This glass must be obtained. It can not only be used in this project, but also in other optical systems related to the ultraviolet band!
350nm波长10mm原始透光率90%，这意味着如果加上增透膜等其他技术手段，能把透光率增加到95~98%！

Gao Zhendong laughed loudly: "Okay! It's a deal!"

The other comrades nearby were all dumbfounded when they looked at these two people. Is the communication between technical experts so direct and smooth?

——I want this.

~~~I’m missing that.

—I can give you that!
~~~Okay, then I’ll give you what you want!

I am so envious.

As for how Gao Zhendong knew about this thing, we have to talk about his treasure. When he wanted to get a photolithography machine, he searched the system, but the optical system of the photolithography machine was really rare, and he didn't collect it specifically in his previous life.

But I don't know when he downloaded a paper about optical glass used for 351nm laser. It only briefly mentioned the optical system, but described the corresponding optical glass in more detail. For the optical system that Gao Zhendong wanted, if 351nm can be used, 355nm can also be used.

Because of this, even though he had spent his lottery time to read the paper, he still had to seek help from professional colleagues at the Northeast Institute of Optics when it came to optical systems.

Unexpectedly, it was like a sleepy head meeting a pillow. The Institute of Optics had no lack of optical capabilities, but lacked optical materials. He and the Institute of Optics were running in both directions.

Moreover, he made this kind of glass by chance when he was making quartz tubes. It can't be called by chance. It can be regarded as the recycling of failed products in making quartz tubes.

"Chief Engineer Gao, what material is it?"

Gao Zhendong smiled and said, "Fused quartz!"

High-purity silicon dioxide and necessary functional trace element oxides are heated to 1750°C, then cooled extremely quickly to obtain fused quartz sand, which is then processed into glass.

Unlike single crystals, this thing is in an amorphous state, and its sticky cross-linked 3D structure can bring a very small thermal expansion coefficient and excellent optical properties.

For Mr. Li, he had never heard of this thing. What the hell is it?

However, when he heard that Gao Zhendong had made this thing and had conducted limited tests, he became excited.

Although they are not professionals, at least there won't be too many problems with the basic projects they have tested.

"It seems that Chief Engineer Gao is also an optician and an expert. He has been very modest before." Engineer Li thought to himself, but in fact, that is not the case. Gao Zhendong only knows that material and basically doesn't understand anything else.

He still doesn't know what Gao Zhendong does. He only knows that the 12th Ministry of Machine Building and the Defense Work Committee seem to be very concerned about the project at hand. He now thinks that Gao Zhendong is also engaged in optics, but his direction is a little more biased, so he needs help from his institute in the realization of specific optical systems.

"Chief Engineer Gao, when can you send this material over? We'll test it. If it works, we'll use it to improve the optical system when we add micro-projection."

However, Gao Zhendong's next words shocked him. "Why send it here? It's too much trouble. You should have the materials and equipment here. I'll teach you how to make it, and you can just try it out. If there are any defects, I can use your expertise to improve it."

Gao Zhendong spoke very generously, and there is no doubt that the Northeast Institute of Optics is much better than him in terms of the influence and improvement of specific elements on optical properties.

However, in Li Gong's opinion, this is too generous.

With just a few words, you can achieve great results. Who can resist this?

"No, Chief Engineer Gao, don't get me wrong. We just want to use this material. We don't want your results." Engineer Li thought that Gao Zhendong had misunderstood what he said and thought he was joking with him. In a hurry, he even used honorifics.

Gao Zhendong laughed: "Engineer Li, please don't misunderstand me. I really want to give this thing to you to continue your research. I found this thing by accident when I was dealing with other materials. Our unit's main work is not this, and there is no point in dealing with this. I don't have the energy to keep up, and my expertise is not suitable for it. It's just right to give it to you."

It turned out that this person was a materials dealer. Engineer Li understood a little bit, but he didn't know what kind of materials he was dealing with, but he could have discovered this thing by chance.

Engineer Li was still a little hesitant, mainly because he was thinking about Gao Zhendong: "This... isn't a good idea, Chief Engineer Gao, will this have any impact on you?"

Scientific research results are not decided by one person in any unit. There are many people who are keeping an eye on it.

Gao Zhendong looked as if he had just remembered something and said, "Ah, yes, you are right..."

You see, I have to remind you. Before Mr. Li could finish his thought, Gao Zhendong's second half of the sentence popped out.

"When you apply for a research project, just include our unit in the list. The combination of the two parties can also reflect the superiority of our big family system."

Mr. Li was at a loss for words. What you did was no different from what he did before. It seemed like my reminder was in vain.

However, by this time, he had realized that Chief Engineer Gao might have a relatively high status in their unit and even in their system. He could even have the final say within a certain scope.

Apart from anything else, just look at how lightly he treats this new type of material, and you can tell without even paying attention that he is definitely very powerful.

Think about what I said just now when talking about optical system processing - no matter the cost, just a few sets! The topic he is responsible for is definitely a big topic, and a very important one.

envy!

He didn't know that Gao Zhendong really had no interest in this thing. There were so many similar and more significant achievements.

It is important to find a suitable buyer as soon as possible and send it out for use. Gao Zhendong is more concerned about whether the resolution of the optical system can be reduced to below 5μm after full utilization or improvement of this thing in the hands of the Institute of Optics.

Seeing Gao Zhendong's genuine expression and extremely sincere attitude, Engineer Li knew that he really wanted to hand over this achievement to Dongguan Institute for good use, so he stopped shirking his responsibilities. This is what it means to be selfless and dedicated to the public, this is what Chief Engineer Gao does!
"Chief Engineer Gao, this is a big deal. First of all, on behalf of our company, I would like to thank you for your selfless dedication. We will do our best to make full use of the trust you have given us and give full play to it in the field of optics. So, please wait a moment, I will report to our leaders. You must communicate and make the final decision on this matter."

Gao Zhendong also knew that this kind of thing was not something that Engineer Li could decide just by saying something. To re-produce the product here, he would have to use the resources of the Dongguan Institute, but without a legitimate reason, Engineer Li could not mobilize them.

"Well, just follow your institute's system. I have no problem with that."

Leaving Gao Zhendong here to continue watching the experiment, Engineer Li went out to change out of his protective clothing and hurriedly went to find the chief engineer of the institute.

"You mean to say that Comrade Gao, who commissioned us to develop the optical system, was going to hand over his own achievements in this area to us after learning that our ultraviolet optical materials had defects? Instead of providing us with finished products?"

The chief engineer looked unconvinced and asked, "Did you hear it wrong?"

You can't blame the chief engineer for not trusting Engineer Li. Engineer Li himself is still a little cute, but he still nodded with certainty: "It can't be wrong. I have advised him and confirmed it repeatedly."

The chief engineer said solemnly: "Hiss~~~~~~~You are not friendly."

Engineer Li looked at the chief engineer and said, "Boss, you should listen to less drama."

The chief engineer laughed: "Yes, yes, yes, what I mean is that this comrade is not simple."

Nonsense, Mr. Li thought to himself.

The two of them would not suspect that Gao Zhendong had used false materials to deceive them. It was unnecessary and impossible for him to make such a big joke on such a matter. Gao Zhendong must have materials that matched what he said.

(End of this chapter)