Chapter 736 The Ultimate Application of Lenses
The telescope tube made of thick iron sheets is very sturdy. It is divided into four sections with different diameters. It gradually becomes thinner from the front to the back. The eyepiece at the back is also very large, with a diameter of three centimeters.
Luo Chong held the big guy with both hands and looked at the city wall in the distance. He could even see the fine lines on the bricks of the city wall. He turned around and looked at the dock outside the city. He could even see the wrinkles on the faces of the people by the water.
He raised his head slightly and saw the tower of the newly built Xuefu County on the opposite bank. The city wall below was blocked by the woods and could not be seen.
Luo Chong was immediately excited. This is a killer. If you stand high enough and have a wide field of vision, you can see a distance of ten kilometers. He immediately asked the experimenter beside him.
"What is the magnification of this one?"
"To the leader, according to our algorithm, the magnification of this one should be 600 times, the objective lens size is 120 mm, the eyepiece is 30 mm, the focal length is fixed, it cannot be zoomed, and it uses a convex-convex lens combination." The experimenter next to him immediately replied.
"Very good, can this be made bigger?" Luo Chong looked at him expectantly.
"Well, it should be possible. I wonder how big the leader wants to make it?" The experimenter was immediately happy to hear that the leader liked it. Only when the leader needs it can they have work.
Luo Chong pondered after hearing this. A large telescope like this, with a magnification of 600 times, is enough to be used as a small astronomical telescope, but he is still not satisfied. If it can be made bigger, he decided to build a magnificent planetarium in the future capital of the Han Dynasty, and then install a super-large astronomical telescope, so that it can be worthy of his domineering and lay the foundation for future science.
The vision of the Han Dynasty should look to the sea of stars, that is the permanent direction.
"What if we magnify the objective lens ten times? Can you do it?"
"Ten times?!" The experimenter was shocked and quickly calculated it in his head. He immediately looked at the leader with suspicion. Did the leader make a mistake?
"Leader, this 120 mm telescope is very difficult to hold by hand. Because of this, we dare not make a bigger one. If it is magnified ten times, the diameter of the objective lens will have to be 1.2 meters, and the entire telescope tube will have to be seven or eight meters long. How can such a large telescope be used? What is it used for? Did the leader make a mistake?"
Luo Chong smiled and shook his head. The other party had never seen an astronomical telescope and certainly did not understand the intention of doing so, so he did not blame the other party for his doubts and questions, but just guided him.
"Didn't you say that someone was blinded because he used it to look at the sun? Since someone knows how to use it to observe the celestial bodies in the sky, aren't you curious about the stars in the sky? I just want to make a bigger telescope specifically for looking at the stars in the sky.
You have to know that we have the Imperial Observatory in our tribe. They originally formulated the calendar and farming time by observing the sun, moon and stars. If there is a tool that can allow them to see more clearly, this will definitely be a great benefit for our Imperial Observatory.
Also, in terms of design and production, since you have thought that a telescope that is too large to be hand-held, why not install a detachable bracket for it, like this tripod bracket."
Luo Chong said, then turned and walked back to his desk, found three pencils and put them together to demonstrate to him what a tripod looks like, and how to install the telescope, etc. The researcher was also greatly inspired after seeing it.
"Chief, how do we install the larger one you mentioned just now? And the outer lens barrel? If we use iron sheets again, it may not be able to support the weight of the giant lens."
Luo Chong took a look at this guy. He was quite disdainful of his behavior of not wanting to use his own brain, but in order to avoid taking detours, he decided to guide him.
"First of all, since you know that a large volume will increase the weight, why don't you think about how to reduce its weight? Of course, iron sheets should be used. You should know that we now have rivet and welding technology. We can use angle iron or iron bars to make a frame similar to a keel, and then paste the iron sheets on it. This can not only ensure the strength of the structure, but also use thin iron sheets to reduce the weight. So do you understand?"
"As for the bracket, you must first consider the purpose. This is a telescope used to observe stars, so you must first ensure that it can rotate in all directions and point to any direction in the sky.
Then there is the strength of the structure. Make sure that the bracket can support the weight of the telescope and install it firmly. Don't let it fall.
Third, you also have to consider the later maintenance. It is best to leave a door on the barrel for easy opening. If the lens is damaged, it must be easy to replace.
This is a large device, especially the bracket and the telescope itself. It is impossible to just throw it away if it breaks like a small one. It is so big and difficult to make. Regarding the later use and maintenance, you must plan and plan in advance. Otherwise, in addition to the trouble in the later stage, it will be difficult to repair it when you want to."
"Yes, thank you for your teaching, I will definitely study and research hard." The researcher was so excited that his face turned red when he heard Luo Chong giving a lecture. You know, not everyone has the opportunity to listen to Luo Chong personally impart this knowledge.
However, after he calmed down, he was immediately stumped by the bracket the leader mentioned. How difficult would it be to rotate in all directions?
Luo Chong looked at his expression and felt even more disappointed. He had to continue to remind him, "Don't keep your eyes on the research institute. Go out and look around, ask more questions, broaden your horizons, and find inspiration from life and nature. This is what a researcher should do.
Just like the telescope tube and bracket this time, you can go to various places to look for inspiration, the transmission structure of lighthouses, the manufacture of sailboats, the transmission of windmills and waterwheels, and the application of various mechanical principles.
Ask carpenters for advice and learn from others' experience. Don't think that you are the best after entering the research institute. There must be a teacher among three people. Learn from others' strengths and weaknesses, draw inferences from one example, and apply what you have learned. This is what a researcher should do.
In addition, I can tell you one more thing. It is actually very easy to make the telescope rotate in all directions. You can refer to the ship-mounted crossbow in our tribe. It only needs a longitudinal joint and a horizontal joint to solve the problem of all-round rotation. You can see the rest for yourself."
"Yes, thank you for your guidance, Chief. Chief, shall we just do it?"
Luo Chong's careful guidance immediately made the researchers very grateful. If they still couldn't come up with what the chief wanted after being reminded to this point, they would have no need to stay in the institute.
"Don't worry. First make a few samples of military-type monocular telescopes, and then prepare for mass production. Use the 50mm bun lens, 40x zoom, and iron shell.
After completing this work, start designing a large telescope with a half-meter diameter objective lens. The other requirements are designed according to the requirements I just mentioned. First make a blueprint, then make a model in proportion to verify. If you think there is no problem, bring the model to me. After I agree, you can make the real thing." Luo Chong immediately explained.
"Yes, leader, I understand. What about these telescopes?"
"Leave these to me, take the others back, and continue to study them. Remember, don't leak them out at will, otherwise you know the consequences."
Luo Chong selected a few models with good quality and kept them, and then sent the researcher away.
Regarding the research on lenses, we must continue to increase our research efforts. There are still many functions of optical lenses, and if they are well developed, there will be a series of branches that can produce results.
Monocular telescopes, binoculars, myopic glasses, hyperopic glasses, reading glasses, industrial sunglasses, and more advanced microscopes, and even cameras, these are all scientific and technological achievements with lenses as the core. In the future, the Han tribe must make these things one by one. Telescopes are just the beginning of lens utilization.
After everyone left, Luo Chong immediately asked someone to send the largest telescope with a magnification of 600 to the Rat Witch.
The old man is still working as the supervisor of the Imperial Observatory. He has seen stars and celestial phenomena all his life, but he has never used a telescope to see them. I hope he will like this thing very much.
The Rat Witch is very old. Even he himself does not know his exact age, and Luo Chong does not know it even more. If it were not for the excellent living standards of the Han tribe now, this old man might have died long ago.
Luo Chong was worried that he would not be able to wait for the birth of a large astronomical telescope, so he simply took this small one to open the eyes of this old man who has devoted his life to the starry sky, and perhaps it would also relieve his regret.
Another half month passed, when Niuwei finally boarded the ship to the dock of Liuyang County, the currency promotion of Shouya in Xin Tribe had also begun for a while. The delegation officially began to use currency as a medium of exchange. All things traded with the delegation had to be measured in currency.
The four sampans presented in advance had been handed over to the Xin Commander. Although they were only eight-meter-long paddle boats, they were still treasures for the Xin Tribe. As a representative, Elder Qi immediately towed the four boats back and immediately sent people to start imitation and research. Nowadays, those elementary wood processing techniques are no longer difficult for them who have all kinds of tools.
As for the sloop and brig in the agreement, the Han Tribe only provided the right to trade. The Xin Tribe had the right to buy from the Han Tribe, but could only trade with the currency of the Han Tribe. However, they did not have so much currency now, so they had to wait for a while.
In order to gather enough currency for the trading ships as soon as possible, the Xin Tribe even had to open the door to the currency promotion of the Han Tribe and actively encourage the people to exchange for various copperware in their hands. Even the high-level officials of the Xin Tribe were no exception.
However, the Han tribe had anticipated this situation. It was impossible for the Han tribe to exchange so much currency for the copperware of the Xin tribe, so they could only exchange it with cheaper ironware. However, the price of these ironwares for the Xin tribe was not low. Let alone the problem of the Han tribe's steel production, the freight from Xingang County to here alone was not a small amount. The Han tribe certainly would not lose money to make a profit.
However, the Xin tribe was also happy to see such a scene, because using the currency promotion of the Han tribe to obtain a large number of ironware was originally part of their plan.
But in this way, the money used by the Xin tribe to raise money for the purchase of ships was not enough, and in the end they could only grit their teeth and sell the resources of Takeshima to exchange for enough coins from the Han tribe.
A large amount of grain and white salt were loaded on the cargo ships of the Han tribe and finally transported to Takuhai County. The grain was left for local construction, and more white salt was distributed to the newly established counties and prefectures in various parts of the Han tribe, especially the three counties of Honghu in the grassland, which did not have the ability to produce salt themselves. Their grain and white salt all needed to be supplied from other places in the Han tribe.
However, other counties of the Han tribe can also obtain a large number of livestock, fur, meat and other resources from the three counties of the grassland. It can be regarded as an internal virtuous cycle. No party suffers a loss. It's just that the economic characteristics and needs of each place are different.
On the other hand, when Niu Wei came to the Han tribe again, it was still a busy and vibrant scene. Various large ships were still launched here one after another, which shows the strength of the Han tribe's water transportation.
There are also some different new things in the familiar scenes, more glass-inlaid house doors and windows, petty officials riding bicycles to the countryside to collect agricultural taxes and mouth taxes, farmers riding tricycles constantly between fields and houses, and horse-drawn carriages carrying building materials and various tools and food on the road. A large number of slaves with their big toes cut off dug canals and built roads, built cities and bridges under the scorching sun.
These people were forced to shave their heads, their bare upper bodies were tanned red in the sun, and they worked tirelessly to build the Han tribe. Although the Han tribe used slaves ruthlessly, they still tried their best to provide them with welfare. At least they could drink the mung bean and wild fruit soup cooked in a big pot for free.
Niu Wei looked at the huge number of slave infrastructure teams. Although these people had their heads shaved, they could still tell where they came from from their habits, language, and appearance.
Among them, the most obedient and honest, and the smallest in number, were the slaves of the cannibals in the early days. The second largest proportion of them, who were occasionally disobedient and had to be whipped, were all herdsmen slaves on the grassland. Many of them even looked familiar to Niu Wei, like some of the middle and high-level confidants of Maodun's forces.
What shocked him the most was that among these slaves, there were also a large number of Xin tribe members who also looked quite familiar. He walked closer and carefully identified a few people, and immediately recognized that these were the relatives of the great elders of the Commanding Faction, and there were quite a lot of them, and it seemed that there were at least one or two thousand people.
I think these should be the prisoners captured by the Han tribe in that battle. Sure enough, the Xin tribe could not defeat the Han tribe. Fortunately, he is now a member of the Han tribe.
Many of the slaves also recognized Niu Wei. After seeing him, they couldn't help but curse him immediately, calling him a traitor, despicable, and a murderer of his compatriots and clans.
Niu Wei looked at them indifferently, and didn't agree with them in his heart. Being able to live an advanced life in the Han tribe is his ultimate goal. What's the use of a group of brainless sand sculptures being loyal to the bamboo island with no future? The vast continent is the real paradise.
He turned around silently, not wanting to pay any more attention to these people. Not long after, he heard the sound of whips being whipped and the slaves howling. He could not curse them at all and returned to his busy work.
(End of this chapter)
Continue read on readnovelmtl.com
