In the astronomical world of later generations, there are many types of astronomical telescopes.
According to technical principles, it can be divided into many models
Such as reflecting telescopes, refracting telescopes, radio telescopes, etc.
The first astronomical telescope in human history built by Galileo was a very standard refracting telescope.
The modern Hubble Telescope is also a refracting telescope, but its diameter has reached the human manufacturing limit of a single optical mirror.
The James Webb Telescope and others are reflecting telescopes.
As for the radio telescope?
This is relatively rare.
For example, the Sky Eye in our local mountainous area is a radio telescope, and the entrance fee is only fifty yuan.
As for the astronomical telescope Xu Yun mentioned, he naturally refers to the reflecting telescope, which is also the type of telescope that is most commonly used in later generations.
But no matter how simple the hand-rubbing process is, there is one link that cannot be avoided.
That is, the calculation of data.
From the most basic imaging focus,
The impact of moderate to atmospheric disturbances,
It is as big as human flesh optimization through axial spherical aberration curve.
Almost every process must use mathematical calculations.
Of course.
As a professional who has been engaged in scientific research for his entire life, Xu Yun is not troubled by the calculation of these data.
With just a few basic data, you can calculate it even with your eyes closed.
But the problem is
Does this make sense?
Science knowledge is not as memorized as liberal arts. Especially for the professional research and development field, cramming education is meaningless.
Because the research and development field requires constant updates and iterations, that is to say, practitioners must have hands-on capabilities.
The preparation of allicin before was for emergency purposes, so Xu Yun did not have time to explain the deeper knowledge clearly.
But now it is a routine physics teaching situation. If everything is explained clearly clearly on the initiative, it may not be a good thing for Lao Su and others.
Even in later generations of teaching, teachers sometimes personally asked students to conduct experiments to verify phenomena.
Get hands-on experience and use practice to break through cognitive barriers.
This is much better than pure one-way knowledge infusion.
So this time, Xu Yun chose to be a stranger.
I saw him pondering for a moment and said to Lao Su
"Sir, according to the notes left by the Fengling Yueying Sect, there is not much difference in structure between a telescope and a microscope.
Both require the use of objective lenses and eyepieces, but the focus, that is, the accuracy of the mirror, is somewhat different.
but unfortunately
The manuscript's record of the telescope only ends here, and the later parts were accidentally lost.
The second half is precisely the most critical link in the production process, which involves a lot of mathematical deductions. If some necessary accuracy is lost, the telescope will suffer."
Lao Su couldn't help but frowned. As a big boss who had done combination engineering, he naturally understood what the accuracy data represented.
"Xiao Wang, why is the data lost?"
Xu Yun sighed after hearing this, as if he remembered something regrettable,&bsp&bsp explained
"It is rumored that in a certain year and month, Shi Hao was calculating whether it was possible to cut off time. Unexpectedly, a man with red hair suddenly broke into the sect and snatched away the second half of the manuscript and Shi Hao's favorite
milk jug.
Since then,&bsp&bspShi Hao has been determined to live in seclusion, hiding from the world,&bsp&bspnot being recorded in ancient history."
After hearing Xu Yun's words, a trace of regret suddenly appeared on Lao Su's face.
Throughout the history of previous dynasties, talented people who retired to the fields because they were discouraged almost always went to the stars in every dynasty.
Some are like Tao Yuanming, who lived a free and indifferent life after retiring into seclusion, leaving behind for future generations a great figure who is open-minded and open-minded among the mountains and rivers.
Some, like Wang Rong, only left one or two footprints and handprints, and were occasionally sighed by future generations.
And most of them are penniless, and all traces have disappeared with time.
Their names can only be vaguely glimpsed once or twice in the county annals where they live in seclusion, and most of them will be followed by the words "unknown birth and death".
at the same time.
Old Su thought of his good gay friend again, another Old Su - Su Shi.
Brother Zizhan is now settled in Danzhou (which is later known as Hainan).&bsp&bspI wonder how his health is now?
I heard that in another year,&bsp&bspThe emperor may issue an amnesty,&bsp&bspI hope that Brother Zizhan will be favored by God by then.
Then Lao Su returned his mind to reality and focused his thoughts on the astronomical telescope.
For such an "artifact", he really didn't want to give up.
Then he thought for a moment,&bsp&bspWith some expectation, he said to Xu Yunde
"Xiao Wang, although the notebook about the telescope has been lost, you still remember the structure of the object, right?"
Xu Yun pretended not to understand the purpose of this sentence and nodded obediently.
"That's right."
When Lao Su heard this, a glimmer of light suddenly flashed in his eyes.
He was silent for a moment, and he seemed to have made up his mind and solemnly said to Xu Yund
"Xiao Wang, if you can provide enough financial resources and calculations, is it possible to rebuild an astronomical telescope?"
Xu Yun groaned softly, with a trace of solemnity on his face.
"Although the accuracy data of the items required for astronomical telescopes has long been lost, the axiom basis for surveying and mapping accuracy is still there.
If we can find some manpower and have all the materials, we can combine the axioms with reverse reasoning and have a chance to build an astronomical telescope."
Hearing Xu Yun's words, Lao Su's eyes suddenly lit up with joy, and he turned around and looked at each other with Xiao Li and Xiao Zhao.
After a while.
I saw Lao Su take a deep breath, make some determination, and decisively say to Xu Yunde
"In this case,&bsp&bspI will give it a try,&bsp&bspsee if we can restore the astronomical telescope again!
It would be a pity that such an instrument that allows mortals to look up at the sky was buried so quietly."
This chapter is not finished yet, please click on the next page to continue reading the exciting content! He paused and continued to talk to Xu Yunde
"Xiao Wang, I wonder what people or things are needed to make an astronomical telescope?"
Xu Yun thought for a while and said
“First of all, he is naturally a mirror maker, and he also needs to be a master of the world.
Whether it is a microscope or an astronomical telescope, the real core is actually the objective lens and eyepiece.
Especially for telescopes, if the precision of the glass mirror is high enough, you can cut a piece of bamboo to make the mirror body.
Therefore, high-quality glass raw materials and craftsmen are essential. Of course, further processing and polishing are also required.
By the way, the donkey also needs to be prepared."
In the weird circles of later generations, rubbing telescopes by hand is a very common thing.
The commonness is even much higher than that of hand-twisted generators.
After all, homemade generators are generally useless, but homemade telescopes can look into the distance or the stars.
Therefore, in the di circle, airplane cups and telescopes are basically the two most common items.
There are generally three ways to make your own telescope:
One is to just buy the parts from a certain package and assemble them yourself, which means you are left with the brand fee and processing fee.
The second is to buy a cheap convex lens yourself, grind the lens to achieve silver mirror reaction, and grind and assemble it throughout the process.
The third method is to use Gaussian optics to formulate equations and use surface curvature as a variable to calculate the spherical aberration coefficient, which is standard pure hand rubbing.
Of course.
The third method seems to be mainly based on calculation, but when making and grinding lenses, the higher the requirements for manpower and materials, the better.
So after listening to Xu Yun'e's request, Old Su thought for a moment and turned to Xiao Zhao
"Your Highness Prince Jian, I'm afraid I need to trouble you this time."
Xiao Zhao put his hands behind his back and readily agreed.
"No problem. Just leave the craftsman who made the utensils to me. The required materials will also be listed. They will be available within seven days."
When Xu Yun heard this, he quickly raised his hand to Xiao Zhao.
"Then there is Your Highness Prince Laojian."
"Are you busy?"
Xiao Zhao raised his eyelids and glanced at Xu Yun, with a slightly sarcastic smile on his lips.
However, he seemed to have restrained himself, and finally did not speak.
Now that Zhao Ji has just taken office, except for a few close friends, there are almost no high-ranking officials who can be trusted.
Although the handover of the throne was relatively peaceful, everything seemed to go smoothly.
But for the royal family, having no one of their own in the court can basically mean that they are surrounded by dangers.
Even Zhao Ji, a futile king of later generations, was quite sensitive in this environment.
Therefore, if Xiao Zhao took the initiative to propose that he needed craftsmen and property to build a star-gazing toy, the entire process would be completed under the nose of Song Huizong.
Then not only would Song Huizong not refuse, but he might even double meet Xiao Zhao's request and give him whatever he asked for.
After all, looking at all the brothers, Xiao Zhao is the one who poses the greatest potential threat to him.
If he indulges in playing, it means that Zhao Ji can devote more energy to developing his confidants.
No matter how difficult it is, you can still get more power from the Queen Mother.
Actually.
This is also one of Lao Su's purposes. He hopes that the relationship between the two emperor Zhezong's brothers can be eased to friendship as soon as possible.
only
is it possible?
Think of this.
Lao Su exhaled a sigh of relief and forced himself not to think about these political issues.
After all, I have resigned from my job and am doing my best in some things just out of emotion. There is no need or energy to get involved too much.
Then he looked at Xu Yun and asked
"Xiao Wang, apart from property and craftsmen, what else needs to be prepared?"
Xu Yun glanced at Lao Su, who had an expression on his face that said, "My family is quite big, you can say that." He pondered for a moment and replied
"Except finance and craftsmen, there is only a little left."
"That point?"
"A master of arithmetic and deduction!"
"Arithmetic deduction?"
Lao Su repeated the word, which was not too surprising.
After all, Xu Yun said before that the accuracy of the telescope must be calculated first before preparation.
Although everyone now has basic arithmetic knowledge, it is obvious that there is still a certain gap between the series of preparation calculations.
Even Lao Su himself did not have a particularly deep understanding of mathematics.
This is also a very common phenomenon in later generations. Top physicists actually have little contact with top mathematicians.
The mathematical literacy of many physicists is just that they are better than other people except mathematicians.
This is not the case for the complete systems of mathematics and physics in later generations, let alone ancient China.
It is impossible even for Lao Su to dabble in two of the most profound science majors at the same time.
Then Lao Su thought for a while, and suddenly a figure flashed in his mind.
I saw his expression was shocked, and he said to Xu Yunde
"Xiao Wang, I have a good friend named Han Gonglian, known as Mr. Yang Huai.
In the early years, when I was ordered to test the armillary sphere used by the Taishi Bureau, I met this person by chance.
This person was very fond of arithmetic and deduction throughout his life, and his calculation skills were extraordinary, and he was even ranked among the top five in Beijing.
I am currently studying arithmetic in the capital, if I ask, I will definitely be willing to help!"
