Chapter 735: The Advent of the Telescope
Luo Chong made such a decision for his own considerations. The Han tribe had just experienced a war, and it would take some time to fully digest the spoils of war, or to manage the looted land and population.
In addition, the fleet of Fubowei needed to be trained, and the 10,000 young and strong herdsmen brought to Takumi County also needed to be reorganized into an army. Now is not the best time to launch a war against Takeshima.
Although the Xin tribe can take out much fewer troops than Maodun, going to war with the Xin tribe is completely different from going to war with Maodun.
When fighting Maodun, the Han tribe was on the defensive as a whole. As long as they blocked Maodun's attack and preserved the construction achievements of Kaiyuan County, they would win the battle. Moreover, the two sides started a decisive battle, and the pursuit of Maodun was mainly manpower.
But Zhudao is different. The strategic goal of the Han tribe is to occupy the entire Zhudao land and population, so the military force required is much greater than the grassland battle, because every time a place is conquered, troops must be stationed to maintain the initial public order. Otherwise, it is actually meaningless to defeat the direct lineage of Commander Xin.
Luo Chong has already expected that these guys probably dare not fight a decisive battle with the Han tribe. If he were Commander Xin, he would definitely avoid a head-on collision with the Han tribe. Using the advantages of local combat, relying on the right time, right place and right people, fighting guerrilla warfare or ambushing the Han tribe is the best way.
The Xin tribe wants to buy time, and Luo Chong also wants to buy time. Since the goals of both parties are temporarily the same, it doesn't matter if they cooperate a little. By the way, they can legitimately promote the currency of the Han tribe on Zhudao, and save trouble after the occupation.
Luo Chong's reply was quickly delivered to Shouya, who immediately began to negotiate with Elder Sheng according to his order. However, negotiations were obviously not something that could be completed in a day or two. Both sides needed to maximize their own interests, so for two consecutive days, both sides were constantly testing and guessing.
The Xin tribe wanted to directly ask for the shipbuilding technology, but the Han tribe was of course unwilling to give it, and only agreed to sell them a few single-masted boats. That's right, it was to sell, not to give. The Xin tribe certainly couldn't accept this, so Elder Qi wanted to send someone back to ask the commander-in-chief for his opinion.
But what he didn't expect was that the person he trusted most, the person he sent back to ask the commander-in-chief for his opinion, not only asked for the commander-in-chief's opinion, but also secretly brought news about Niu Wei to Shouya. This guy was also an intelligence officer of the Jinwu Guard.
After being imprisoned for half a year, he learned that the Xin tribe's joint action against the Han tribe with Maodun failed, and was preparing for war against the Han tribe again. Niu Wei felt that there was no need for him to stay. If they fought again this time, it would definitely be the last war between the Han and Xin tribes. If he continued to be imprisoned, he would only end up dead, so he wanted to leave.
It was the best choice to let the intelligence personnel help him out of trouble, but Niu Wei did not have the power to directly order them. Moreover, the reason why the two tribes of Han and Xin deteriorated to the current situation was largely due to his previous hasty plan.
He did not know what the Han tribe's attitude towards him was now, and whether they were willing to rescue him, so he did not choose to act rashly, but only entrusted the intelligence personnel to help him pass a message to the delegation, expressing his idea of going out and continuing to be loyal to the Han tribe.
This news was successfully delivered to Shouya by the confidants around Elder Qi, but Shouya looked at Niu Wei's letter for help and didn't know what to think.
He couldn't make the decision on this matter. First of all, the intelligence personnel of Jinwuwei were not under his control. If he privately ordered them to rescue Niu Wei and exposed them, it would be more trouble than gain. You know, these people had finally succeeded in lurking in the upper echelons of the Xin tribe, so he had to ask Luo Chong first.
So Shouya sent a letter to Luo Chong again on the pretext of asking the leader for the terms of negotiation, told him about Niu Wei's request for help, and asked Luo Chong for his opinion.
After receiving the letter, Luo Chong thought for a long time whether Niu Wei was worth rescuing.
The answer was clear. This guy was indeed talented, but he was too impulsive and eager for quick success. This could be proved by the previous currency promotion event and the fact that he personally led a team to the Han tribe. It would be
no problem to bring him here and make him a county governor. Besides, after the full occupation of Takeshima, there would definitely be a need for many officials. In fact, the Han tribe was already in short supply of officials. It was because the development was too fast and there was a lack of talent everywhere. No matter what kind of talent, the Han tribe was short of it.
So even if Niu Wei had no other value, it was still okay to let him be an official and a shepherd. It was indeed necessary to rescue him, but it was definitely not to let the intelligence personnel rescue him. The risk of exposure was too great.
Now it was during the negotiation period. If Niu Wei could be directly brought here through negotiation, it would be great. After a little thought, Luo Chong quickly wrote a reply letter to Shouya.
After reading Luo Chong's reply, Shouya understood what he meant, so he found Elder Qi and the two sides started another round of negotiations.
Finally, after a tug-of-war bargaining, the Han tribe gave away four sampans and provided the trading rights of a sloop and a ketch in exchange for the currency issuance and circulation rights of the Xin tribe on the entire island, and asked the Xin tribe to send the merchant elder Niuwei to assist the delegation in currency promotion. During the assistance period, the Han tribe paid Niuwei for employment, but Niuwei must obey the dispatch of the Han tribe.
It was equivalent to directly redeeming this guy with the trading rights of two boats.
Niuwei's identity had long been clear to both parties, but it had never been put on the surface. Even the original arrest was carried out secretly at night. Even the people of the Xin tribe did not know that their merchant elder was arrested and imprisoned.
Knowing that the Han tribe wanted to take Niuwei away, the Xin commander was immediately furious. This undoubtedly further confirmed Niuwei's identity as a traitor. The Xin commander wanted to kill him as soon as possible.
However, several elders, led by Elder Jin, persuaded Commander Xin to agree. Niu Wei had already vomited out everything he knew and could ask. It was meaningless to kill him now. Since the Han tribe was willing to exchange this guy with the condition of selling the ship, it would be better to hand him over and get something useful for the tribe in the end.
After venting his anger on his own chair, Commander Xin finally swallowed his anger and agreed to the condition of handing over Niu Wei.
In the following time, Niu Wei was naturally released openly, but when he met Commander Xin, he was scolded by him very rudely and warned him not to tell anything to the Han tribe, otherwise his family left in the Xin tribe could not guarantee the result.
Family or not, in Niu Wei's view, is no longer so important. As long as the Han tribe is still willing to use him, there is no need to worry about not having family.
Therefore, Niu Wei did not take this matter seriously with Commander Xin and agreed to it happily. He now just wants to gain freedom as soon as possible and regain the recognition of the Han tribe.
Niu Wei soon arrived at the delegation where Shouya was, but he did not take on any task of promoting currency. Instead, he went back to the Han tribe by boat on the pretext of transporting currency to the Han tribe. He wanted to see Luo Chong, and Luo Chong also wanted to see him. For safety reasons, of course, it was safest to recall him to the Han tribe.
On the other hand, when Shouya officially started currency promotion, good news came from the Han tribe in the central and northern part of the mainland. The telescope that Luo Chong had people try to build finally had a clue.
That morning, the telescope development team of the institute sent Luo Chong more than a dozen telescope samples, with different lens sizes, different lens combinations, and different lens barrel structures. They made one of each.
The method of making a telescope is not difficult. You just need to install two lenses on a sunshade. The difficult part is the focal length, lens size and combination.
Arriving at the top floor office of the Hanyang City Government Building, this is the tallest building in Hanyang City, which is very suitable for telescope observation.
The experimenter next to him began to introduce the functions of different models to Luo Chong, as well as their research results.
"Leader, we have done a lot of experiments based on your tips and understood the definition of the focal length of the convex lens. At the same time, based on the principle of the telescope you mentioned, we also tried the law of magnification under different lens combinations. Now the batch we are making is made according to this formula."
"Oh? What formula? Tell me." Luo Chong asked about their research results curiously.
"The focal length of the objective lens divided by the focal length of the eyepiece is the magnification of the actual scene. We define the telescope magnification according to this."
"Well, let me try it first."
Luo Chong had almost forgotten the things about the telescope, so he didn't know whether the conclusion they came to was correct, so it was difficult to give an evaluation. Anyway, his requirements were not high, as long as it could be used.
The smallest model is a bamboo tube, there are two of them, about one foot long. According to the markings on the tube, the diameter of the objective lenses of these two telescopes is only 30 mm, and the eyepieces are convex and concave lenses respectively, which are used for comparison.
The one with the convex lens eyepiece is marked with a magnification of three times, while the one with the concave lens is eight times. This aroused Luo Chong's interest. Could it be that with the same size, the eyepiece made of concave lenses can see farther?
He stood on the windowsill and looked at the city wall in the distance with the telescope. The visual effect of the three-fold telescope can only be said to be average. It does have a certain telescopic or magnifying effect, but the image quality is very average. First of all, in addition to the small field of view, the other thing is that except for the relatively clear center of the circular lens, the surrounding circle is very blurry, as if a blur special effect has been made.
The experimenter next to him saw Luo Chong frowning, as if he remembered something, and took the initiative to remind him, "Chief, don't put your eyes close to this bamboo tube triple mirror when looking at it. It's best to leave a palm-width distance, so that it looks clearer."
"Oh." Luo Chong nodded and did as he was told, without blushing in embarrassment because of the wrong use.
He closed his left eye and moved his right eye to the back of the eyepiece and adjusted it slightly. As expected, he found that the field of vision was much clearer, and the blurred scenes around him were also clear. Only the outermost circle was slightly deformed and distorted, but the overall view was still good. It was
just that this strange posture of use did not feel like using a telescope, but like a scope on a sniper rifle
. Thinking of this, Luo Chong was happy again. Although this model was not suitable for telescopic use, it was very suitable as a scope, which could be kept as a technical reserve for the development of rifles in the future.
He picked up another bamboo tube 8x telescope of the same size and used it in the same way as before. However, this telescope, which uses a concave lens as an eyepiece, can see more clearly than the previous one. In addition to the smaller field of view, the image quality does not appear blurred or shaken, which is very suitable for developing into a firearm sight. If nothing else, at least the current artillery is in great need of it.
Luo Chong silently wrote down this model and then began to test other models.
There are four versions of the 40mm objective lens model, namely, a convex-convex combination single-tube 8x telescope, a convex-convex combination single-tube telescopic zoom 8 to 12x telescope, a convex-concave combination single-tube 10x telescope, and a convex-concave combination single-tube telescopic zoom 10 to 30x telescope.
Luo Chong tried them one by one and found that the same problem still occurred, that is, the eye cannot be too close to the eyepiece during observation. However, the last one with a zoom of 30 times can almost be put close to the eyepiece to watch, and the 30 times marked on it is really not an exaggeration. Standing on the window sill of the office on the fifth floor of the government building, he can see every rivet on the battle drum of the tower. It
is really amazing. If there is any disadvantage, it is that the field of view is small, and the things seen are darker than the normal visual scene, and the light transmittance is obviously problematic.
"What is different about this last one, why is the effect so good?" Luo Chong asked the experimenter holding the last 30 times.
"To reply to the leader, there is not much difference in this one. The only difference is that we replaced the front objective lens with the steamed bun lens you mentioned."
"Oh, that's it." Luo Chong nodded in understanding.
The steamed bun lens is also a lens he proposed, that is, a magnifying glass with a shape similar to a steamed bun.
The so-called convex lens, as long as the edge is thin, the center is thick, and the transparent lens can be called a convex lens. Most normal convex lenses are thin at the edge, and then thickened from the center point to both the front and back sides.
The steamed bun lens proposed by Luo Chong is a light-transmitting lens with thin edges and an almost flat back side, with only one side thickened. It is named because of its shape resembling a steamed bun. In fact, it should be called a special-shaped convex lens.
However, what he did not expect was that this convex lens would be so effective as a telescope. The image quality of the lens was very clear, without blurring or shaking. It was best used at ten times the magnification.
Then Luo Chong tested other lenses. Among them, the six telescopes with a 50mm objective lens had the best effect. The basic magnification was ten times and the maximum magnification reached forty times. At the same time, because the size of the objective lens was increased, the viewing angle and light transmittance were also the most suitable for a handheld telescope model.
Luo Chong immediately designated this 50mm aperture monocular telescope as a military model, using a handheld holder with a metal barrel and a wrist strap. After making qualified samples, it could be mass-produced.
However, there was also a largest telescope in the room waiting for Luo Chong to test. It was an exaggeratedly large telescope with an objective lens diameter of 120mm and a barrel length of 80cm.
According to the experimenter nearby, this big guy can clearly see the moon and stars at night. One researcher used it to observe the sun during the day and was blinded in one eye.
(End of this chapter)
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