technical type

Ji Mo made a monocular telescope, a convex lens made of crystal wafers, the light transmission effect is not bad, with a simple barrel body, just adjust the position of the lens. What needs to be mentioned here is the calculation .

The length of the barrel and the focal length, how to match them, and how to see the correct image instead of being upside down require a certain amount of experimentation.

Ji Mo did this while studying, because he needed to keep trying repeatedly to adjust the final imaging effect, and the final product appeared later than expected.

"What is it, so anxious."

Ji Changwei was pulled out of the room by Ji Mo. His daily routine was to get up early and go to work in Sitianjian after eating. He was mainly busy with various calculations, and he might take a break from his busy schedule to play with his own horoscope. He would be in Sitianjian at noon. Eating the meals delivered by the servants, there is no working meal. In this regard, the court is not too humane, which may be because most officials are not at work after noon.

For those officials who are still willing to stay behind and continue to work honestly at their jobs, the meal at noon is mostly delivered by their family members, or they will go out with friends to eat, and if they feel that there is nothing wrong with work after eating I can't do it tomorrow, maybe I will go home directly.

Ji Changwei belongs to the most conscientious kind. He basically never leaves his seat when he eats lunch. He may take a nap at noon. Test three or something.

I got off work on time in the afternoon, went home to have dinner with my wife, and then went back to the study to do my calculations. Ji Mo once looked through his bookshelves, and there were no extra novels, which shows that Ji Changwei's hobbies are boring .

What Ji Mo is now occupying is the study time he enjoys alone, and this time will not end until before falling asleep, and Ji Changwei will return to the room where his wife is, and rest with her.

There are very few concubines in the Ji family. In this regard, it may be because men in science do not like tenderness?

In short, Ji Changwei doesn't have this string, as if his communication with his wife rarely involves work matters.

"I have a present for you."

Ji Mo pulled him into the courtyard. This place was relatively open, and he could see a starry sky above his head. The hand that had been behind his back showed up, and the wooden box he was holding could no longer be concealed.

"what is this?"

Ji Changwei looked at the wooden box curiously. The wooden box was exquisitely carved, giving it a feeling of low-key luxury. He found it novel because he rarely received gifts.

There were also festivals in ancient times, and there were also some relatively important anniversaries. For example, when a husband celebrates his wife’s birthday, it is an anniversary. On such anniversaries, there may be one or two thoughtful gifts, or one or two sentences Greetings, besides, in family relations, there are very few occasions when extra gifts are given.

Ji Changwei was not Ji Huan's only son, nor was he the one who received the most attention, so he rarely received gifts from his parents, and among his peers, it was obviously not popular, let alone a gift from the younger generation.

On the birthday, it is very good to receive the blessings sent by the juniors collectively.

"Open it and see."

Ji Mo is looking forward to it. He spent a lot of time making it. Of course, he hopes that the other party will like it, and he also hopes that this surprise can be left behind. The more behind, the more joyful it will be!

Ji Changwei took the box. The box was too wide for Ji Mo's hand. He seemed to be holding it with some effort, but it was not heavy. When he opened it, the monocular telescope on the red silk was ordinary compared to the box. There are too many, and the simplicity is a bit surprising. I guess it might be something wrong.

He glanced at Ji Mo, and picked up the binoculars: "What is this?" He asked, turned the binoculars over and over in his hand, and soon found the crystal plates at both ends, and he looked through the larger one. , Uh, black Ma Gudong, what the hell?

Taking another look at Ji Mo, who was snickering, and looking over from the small side, he didn't find anything wrong.

"Look at the sky."

Ji Mo reminded, and pointed to the starry sky above his head.

The environment in ancient times was really good. Many stars were as bright as the eyes could see. Ji Changwei followed his fingers and looked up, and then gestured with a binoculars. Sky, looking up—"Ah, this—"

While losing his voice, his hands subconsciously used force. If the wood used for the barrel was not strong enough, he might have squeezed it out.

"This is--"

His eyes were reluctant to move away from the eyepiece, and he didn't know what to ask. He looked here and there, feeling as if he couldn't stand on his feet, and his head was a little dizzy.

Ji Mo saw his body swaying, and quickly reached out to help him, still wondering in his heart, why, besides being afraid of heights, he also had dizziness?

"This...what the hell is going on? Why, it's right in front of you."

Feeling the support of the pair of small hands behind him, Ji Changwei finally moved away from the binoculars and looked at Ji Mo. What's funny is that he pressed his eyes on the eyepiece too hard in shock just now, and the circle around the eyepiece is convex The raised outline stamped red around his eyes.

It looks quite joyful.

Ji Mo wanted to laugh, but he did. Looking at Ji Changwei's shocked look, he smiled and said, "Do you like it? This gift."

"I like it, I like it, it's good, it's good."

Ji Changwei said repeatedly, and then asked him: "How did this happen? Where did it come from? You bought this when you went out before?"

He picked it up again and looked at it, and then looked again, when Ji Changwei turned to Ji Mo, his expression was a kind of childlike joy, pure and bright.

Maybe it was because he calmed down a little after the shock, and his brain started to work again. He remembered that Jimo had gone out on purpose once, and then he had this. However, for such a long time——

A guess made him unbelievable, but he had to think this way, could it be... Could it be...

"I made this for the convenience of stargazing."

I really couldn't think of doing this before. In fact, most of the time, I can see it with my eyesight. Even when large-scale mechanisms are used in war, both the enemy and the enemy are the same. Distant troop deployment and the like.

Furthermore, since he is not a fan of war and has no command authority, it is difficult to think in the position of a commander. Ji Mo has always ignored it. In fact, with his ability, he has long been able to make such a simple telescope.

The crystal lens can be made by polishing the jade when learning to carve. The body of the cylinder is even simpler, which is pure carpentry craftsmanship, and the technical content is not high. In addition, it can be more convenient to process it directly with bamboo.

This product itself is nothing too profound. If you talk about the calculation formulas and physical principles, can't you use it to make fire if you don't know how fire is composed?

That wasn't absolutely necessary. I forgot the formula, didn't know how to calculate, and adjusted the angle and distance a little bit, and I was able to find a suitable position, so that the telescope was born successfully.

Even if you can calculate, don't you need to slowly debug it when you actually make it?

Seeing Ji Changwei's joy and unwillingness to let go, Ji Mo couldn't help but think of those masters in the past. If he thought of making such things at that time, would he also make them so happy?Isn't it more novel and interesting for many people to bring the far away things to the front of the eye?

Obviously it is not difficult, but you can get more surprises.

There seemed to be a trace of regret in Ji Mo's eyes.

"Quick, take this to your grandfather and let him know that you made it!"

Ji Changwei said happily, and carefully put the telescope back into the box, and suddenly remembered, "By the way, what is this called, let your grandpa name it!"

"It's called..."

The word "telescope" that I wanted to say got stuck in his throat. Ji Mo looked at Ji Changwei who was so excited that he seemed to be fighting for success, and insisted: "This is a gift from me to my father. Grandpa - I will do it again." one."

In all fairness, Ji Huan, the master, is still very good to Ji Mo. Usually, Ji Mo respects his master more than his father, and the roles of the two overlap sometimes. It is worrying, it is inevitable to be biased.

"That's all. The first one is always more meaningful. Let's say it's for your grandpa."

Ji Changwei seriously advised Ji Mo, and hugged Ji Mo who took the box, "Go, I'll take you to find your grandfather!"

Walking like this, Ji Mo is afraid that Ji Changwei will throw himself, don't think highly of a man's physical strength, for weak civilian workers like Ji Changwei, strength is definitely a weakness.

After mentioning that he went by himself and was rejected, Ji Mo didn't say anything else. When he got to Ji Huan's place and experienced the effect of the telescope, Ji Huan was also happy: "You did it?"

Obviously, such a thing is not as difficult as a child can complete. However, there is no need to claim this kind of credit. If you do another one, you can always tell whether it is successful or not.

"Let's call it 'Star Gazing Mirror'." The simple and direct name is Ji Huan's style.

Both Ji Changwei and Ji Mo nodded, yes, very good, just this name.

"Only you can do it?"

Next, Ji Huan carefully asked about the production process of Ji Mo's stargazing mirror, including who was involved in it, who knew that he made such a thing, who saw it, and whether it would be stolen by others, etc. question.

After confirming that there was nothing wrong with it, Ji Huan looked at Ji Mo and pondered: "This skill is very simple as you said, why not let someone else do it, and just guarantee the advantage."

It is enough to be one step ahead of others, and the latter is to take advantage of this step to seek more benefits. Among the big families, they also have to worry about money, and their children and grandchildren make a living. But with this expenditure, there are always deficiencies. It is naturally excellent to be able to open source.

"Okay." Ji Mo didn't plan to take all of them into his own hands, and then became a full-time craftsman, so he quickly agreed, and thus got a considerable amount of buyout fee as a reward.