Back to the Republic of China to be a editor

Tang Hua: "Thank you, Dean. I'll see you at the opening ceremony tomorrow."

Nesmeyanov is not a physicist, he was previously the director of the Institute of Organic Chemistry of the Faculty of Chemistry.

So far, the scientists from the Soviet Union who came to China to aid China have not yet been academicians of the Department of Chemistry.

Tang Hua felt that this was abnormal, and this time he had to abduct one or two back no matter what.

Chapter 215, Laser Holography

"In 1948, Daniel Jabo of the United Kingdom proposed the principle of wavefront reproduction, which can also be described as a two-step lens imaging method..."

"Daniel Jabo believes that if there is a suitable coherent reference wave and an object diffracted wave at the same time, the amplitude and phase information of the diffracted wave can be completely recorded.

"Daniel Jabor came up with a great idea, but he didn't know how to realize his idea. This idea first needs a beam of light with a single wavelength to realize the principle of wavefront reproduction in the laboratory. And in When he proposed the wavefront reappearance principle, there was no light with a single wavelength in the world. However, this light already exists.”

"Ordinary photography records the light intensity emitted or reflected by the surface of an object. The principle of wavefront reproduction not only records the intensity of light, but also records the relative phase of light. It records all three-dimensional information of an object, so I put He renamed it: Laser Holography."

Tang Hua turned on the slide projector. "This device uses a helium-neon laser. The experimental table for holographic recording is shockproof. All optical devices on the holographic table are firmly attached to the steel plate of the work table with magnetic materials. Because the extremely small Interference—even micron-level interference, will cause the interference fringes to blur, and even make the interference fringes impossible to record.”

The USSR-China Laser Physics Conference is in its second session, and it is still an academic symposium known only among a few top scientists in the USSR and China.

For example, in today's venue, only a dozen Soviet scientists participated.After introducing the principle of Q-switch technology to the Soviet Union last year, the design and manufacture of high-power lasers in the Soviet Union began.This year's conference, Tang Hua brought laser holographic technology.

Holographic technology can be used in industrial non-destructive testing, information storage, laser measurement (ranging and gyro), optical filtering... so this technology must be invented, and it is best to continue to improve it with the Soviet Union. I am afraid that China's scientific research resources cannot be held.

Not to mention anything else, for the set of negatives demonstrated today, Tang Hua had to shoot dozens of times before he could get a decent set of films. The experimental instruments used, especially the optical components, were custom-made from abroad with a lot of money.If you want to achieve higher precision or apply technology to mass-produced medical/industrial equipment, you need a complete set of ultra-precision instrument manufacturing system.

The slide projector played the recorded photos of Tang Hua and Zhao Zhongyao building the test platform and carrying out the test.After introducing the production process, Tang Hua took out the negatives.The dedicated laser and playback equipment have been shipped from China, the film is installed, and the playback equipment next to the podium is turned on. A model of the Hongqi-10 missile about 2 cm long and sparkling appears above the empty podium.

Because only a dozen people came to the meeting, and the meeting room was not big, all the scientists attending the meeting saw this three-dimensional, shining object suddenly appear floating in the air.

Tang Hua manually adjusted the knob, and the gleaming Hongqi-2 missile model also rotated accordingly, showing every local detail of the missile to the participants.

……

"It's incredible. Is it true that the saying is that the ultimate form of physics is magic?"

Nesmeyanov, President of the Soviet Academy of Sciences, was sitting below, and he couldn't help sighing when he saw this magical scene.

"Physics? No, Tang Hua is not a physicist, he is just an inventor who understands physics."

Those who answered were the director of the Institute of Theoretical Physics of the Soviet Academy of Sciences, foreign members of the Royal Society of Great Britain, members of the Royal Danish Academy of Sciences, members of the Royal Netherlands Academy of Sciences, foreign correspondent members of the US National Academy of Sciences, members of the British Physical Society, and members of the French Physical Society. Ron Landau.

Seeing Landau's serious face, Nesmeyanov laughed, "Dau, I also heard that you and Tang Hua have a very good personal relationship, but you refused to give Tang Hua a physical ranking, so he has been You still can't make it to level 5, but Tang's partner, Zhao Zhongyao, has already been promoted to level 4 by you..."

"Tang Hua...has a strong reading ability," Landau said. "He can read and understand complex physical theories, and he can even discover ways to produce strange gadgets from the theories. This is his Strengths. But my ranking is based on people who push human theories to unknown fields at the frontier of physics, and Tang Hua does not belong to this kind of people."

……

"Did you really say that to Einstein?! I always thought it was a legend!"

As a Soviet citizen, Landau actually does not drink vodka and all high-grade alcohol, but he can have some red wine and beer, which may be a habit he developed during his youth study tours in Western Europe.This habit of Landau and Tang Hua happen to be similar, and now they are in Tang Hua's villa, Moldovan red wine with pickles and fried peanuts.

"Before that, I debated with him for a long time, trying to convince him of the correctness of quantum mechanics." Landau said, "Unfortunately, Einstein did not change his belief because of the debate. So in the formal meeting, I just I kept staring at him, and sure enough, I found an error in his deduction. I stood up and said that what Professor Einstein told us is not all wrong, but the second equation cannot be strictly derived from the first equation. It requires a unproven hypothesis, and it is not invariant in the way it should be. Einstein thought for a moment at the blackboard and said to everyone: The young man behind is absolutely right. You can take what I said today completely forgotten. . . . "

Tang Hua: "Then when you met with Pauli, did you preventively say 'what I just said may be wrong' after finishing your speech?"

"Said it. Then Pauli reassured me, 'Oh, absolutely not. What you're talking about is such a mess that we can't figure out what's right and what's wrong.'"

……

"Speaking of which, Professor Einstein does not know that someone has already turned his theory of stimulated emission and light amplification into a laser." Tang Hua said.

"I haven't seen Einstein for many years." Landau said, "After the iron curtain rose, theoretical physicists from Europe and the United States never came to the Soviet Union, and Soviet scientists basically could not go to Europe. Einstein opposed the United States. The nuclear arms race is right, but it is a pity that the Special Committee of Atomic Scientists was disbanded. He has continued to develop his theory of relativity in recent years, and wrote an article to refute the criticism of the Copenhagen School. Fortunately, he did not continue to stubbornly oppose it Quantum mechanics is just pretending not to see the development and progress of quantum mechanics."

"If he comes to the Soviet Union or China, I will definitely find a way to meet him and give him a laser pointer. Guess what his expression will be when he sees this thing?"

"Although this is his inadvertent contribution to quantum mechanics, I think he should be very relieved. If he saw a laser cannon, he would be more depressed than seeing an atomic bomb."

"If the physical theory you discover is made into a product..."

"I'd never watch it, unless it's for amusing cats. And my theories are complicated."

Tang Hua figured that after seven or eight years, he should bring a hard disk and tell Landau that this is your magnetic domain theory, antiferromagnetism theory, and giant magnetoresistance theory under the condensed matter physics system.

"Not necessarily, the Chandrasekhar limit was independently deduced by you in 4 pages."

"Chandrasekhar limit? What do you want to do? Use a neutron star as a weapon?"

……

During the four-day laser physics annual meeting, the participants were all attracted by the laser holographic demonstration released by Tang Hua on the first day.Soon various groups were established, some of which were formed by a few scientists participating in the meeting, and some scientists returned to their own universities or research institutes to organize secret research groups.

Below the scientists at the top are the Leningrad Optical Mechanics Association, Krasnogorsk, and the Tula Design Bureau.Then there are more subdivided fields.

Although the alliance of scientists is not the State Planning Commission, it is well-organized to arrange a large scientific research collaboration project, which may exceed the organization level of many projects of the State Planning Commission.

But in fact, Tang Hua's goal is not to mass-produce laser holograms. Of course, it would be better to produce energy.Tang Hua only needed one item in the development process of the laser holographic system.or two pieces.

When everything was done, Commander Xiao and Luo Shunchu's respective regiments had returned from the Black Sea Fleet and the Northern Fleet.

When the official business was almost done, Tang Hua found out that the eldest son of Commander Xiao was studying in the Soviet Union, the Department of Power of the Moscow Power Institute.However, Commander Xiao came to the Soviet Union for nearly two months and did not visit his eldest son until he returned from the Northern Fleet.

"Hi Minister Tang."

Tang Hua looked at Xiao Yongding, "What grade is this year?"

"Freshman, sophomore after the summer vacation."

"This is my plan," Commander Xiao said, "everything has been arranged. The eldest son will study culture, the second son will be a soldier, the third son will study culture, the fourth son will still be a soldier, the fifth son will be a commoner, and the sixth son will be a soldier. One by one at intervals. The two daughters do not give them a direction for the time being, and develop freely."

Tang Hua: ...

This big family is lively enough.

"I was 1921 years old in 18. As the backbone of the Social Youth League, Shaoqi and Bishi, I, and I came to the Soviet Union for the first time and studied at the Communist University of the Eastern Laborers in Moscow. In the second year, I transferred to the Soviet Red Army School to study military affairs. From league member to party member."

Several people were walking on the way to visit Lenin's tomb. Commander Xiao talked about his past in the Soviet Union.

"In the Communist University of the Eastern Laborers, we were received by Lenin. Later, in 1924, Comrade Lenin passed away, and I carried the coffin for Comrade Lenin at the memorial service. I happened to be in Moscow at that time, and I was also a member of the Communist Party of China. , Let me, a young man in his early twenties, be the representative of the Eastern nation."

Tang Hua had received a medal from Stalin himself, but Commander Xiao had seen Lenin and even carried Lenin's coffin.Returning from the Soviet Union, Commander Xiao went to Anyuan to fight the labor movement with the chairman. During the Northern Expedition, he was the party representative of the division and the commander of the 29th Red Army...

The bosses are all so secretive.

“I heard that when Lenin passed away, Mr. Sun Yat-sen also praised Lenin as a “saint in the revolution,” Tang Hua said, “ordered the Nationalist Party Congress to adjourn for three days, and all organs in Guangzhou lowered their flags at half-mast for three days to express their condolences.”

After seeing off his eldest son, Commander Xiao talked about serious matters with Tang Hua, Luo Shunchu and others.