In the next hour, Xu Jianguo explained to everyone the principles of the low-light night vision device and the difficulties in manufacturing it, and then assigned several people the tasks to be done tomorrow.
There are four main components of a low-light-level night vision device: a high-power objective lens, an image intensifier, an eyepiece, and a power supply.
From the perspective of optical principles, low-light-level night vision devices can actually be regarded as special telescopes with image intensifiers.
When objects at night are illuminated by weak natural light, light reflection can be generated through the surface of the object. After entering the night vision device, the reflected light will be focused on the image intensifier through the strong light force objective lens to stimulate photoelectrons.
After the photoelectrons are focused and imaged by the electronic optical system inside the image intensifier, they will stimulate sufficiently strong visible light, thereby further magnifying the target object illuminated by weak natural light through the eyepiece and turning it into a visible light image suitable for observation by the human eye.
When the bell rang for the end of get off work at the 523rd Institute, Xu Jianguo closed his notebook and said, "Everyone, listen carefully. There are seven of us now. Of the four major components, the most difficult image intensifier will be given to me. You will work in pairs on the remaining three. My requirements for you are very simple. Even if you are a little slow, you are not allowed to make any mistakes. Do you understand?"
"Understood!" the six people answered.
"Okay, let's all go back!" Xu Jianguo said.
A few people stood up, swept the cigarette butts on the ground, put the chairs back in place, and then left the small workshop.
After Xu Jianguo finished drinking the tea in the cup, he first turned off the power switch on the wall, checked the stove, put the three helmets he had made into the space, then returned to the inner room, opened the map in his mind, and began to check the coordinates of the project samples.
At this time, the sample coordinates did not move, and they all stayed quietly in the workshop not far from him.
According to Ma Guoliang, there will be soldiers from the guard company guarding this place all night, so Xu Jianguo doesn't know when the person hiding in the dark will choose to take action.
After closing the map in his mind, Xu Jianguo walked out of the small workshop, locked the door, and walked towards home.
He did not go home directly through the space, but took the opportunity to walk to see the group of people from the Military Research Institute who occupied the factory. When he saw the armed soldiers standing at the factory door, he nodded secretly.
When Xu Jianguo returned home, the whole family was already sitting at the dinner table, waiting for him to start eating.
During the meal, Wen Sitian said, "Jianguo, March is almost here. What are we going to do about the three girls' schooling?"
Funiu and Erya, who were originally enjoying their meal, suddenly felt that the chicken legs in their hands were not as delicious when they heard their sister-in-law talking about going to school.
The two looked at each other, their big eyes rolling around and their little ears pricked up, wanting to hear what their brother had to say.
Xu Jianguo glanced at the two of them first, then smiled and said, "I'll go to the logistics department again tomorrow. I have to go to school. Didn't I tell them before? It's no problem!"
When the two little ones heard this, their faces immediately fell. However, when they saw the chicken legs in their hands, they immediately turned their grief into appetite and vented all their resentment on the chicken legs.
Xu Jianguo raised his head, rubbed the two girls' heads, and said, "Listen carefully, you two, you must go to kindergarten. Your eldest sister didn't say anything about going to school, so why are you so unhappy about going to kindergarten? I'm afraid that after you really go, you won't want to go home!"
Funiu took a bite of the chicken leg and asked, "Brother, is kindergarten really that good?"
When Erya heard Funiu's question, she looked at Xu Jianguo with hope in her eyes.
"Of course, when my brother was young, his family was poor and he didn't have the chance to go to kindergarten. Think about it, there are many other children in kindergarten besides you. Isn't it better than being at home with so many people studying and playing together every day?" Xu Jianguo said with a smile.
The two girls listened to Xu Jianguo's description of the kindergarten and found that it was indeed better than the one at home, so their eyes became brighter and brighter, and their originally gloomy little faces gradually became full of anticipation.
After Xu Jianguo and Wen Sitian looked at each other, a smile appeared on the corners of their mouths, and Daya said at this time: "Brother, sister-in-law, can I not go to school first?"
When the couple heard this, they looked at Daya in surprise, not understanding why she said that.
If we were to ask who among the three children likes studying the most, it would definitely be Daya, and it is usually she who takes her two younger sisters to read and write.
Xu Jianguo asked, "Daya, why don't you want to go to school?"
When Daya saw Xu Jianguo asking him, she lowered her head a little embarrassedly, with an expression on her face as if she wanted to say something but stopped.
After a while, the girl finally spoke: "Because... because I don't have teeth, I'm afraid my classmates won't like me when I go to school!"
When Xu Jianguo heard Daya's reason, he couldn't help but burst out laughing.
When Daya heard her brother's laughter, her face turned red with anxiety and she looked at her sister-in-law with a look for help.
Seeing Xu Jianguo's heartless smile, Wen Sitian angrily slapped him hard and said, "What are you laughing at?!"
Seeing his wife getting angry, Xu Jianguo quickly put away his smile and looked at Daya and said, "Daya, do you believe your brother?"
Daya didn't know why Xu Jianguo asked this, but she nodded without any hesitation and said, "I believe my brother!"
"What if your brother tells you that this situation is only temporary and your teeth will grow out soon, would you believe it?" Xu Jianguo continued.
"Really?" When Daya heard this, a look of surprise suddenly appeared in her eyes and she asked.
"Of course it's true. I've never lied to you. And I'll tell you a secret. When you go to school, you'll find that you're not the only one without teeth." Xu Jianguo said with a smile.
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