Chapter 354

"Boss, if these important parts are made in China, the overall performance of our communication and exploration satellites will be reduced by 15% - 20%! Even more, such a performance can not meet the company's communication and detection needs!

And the boss attaches more importance to the space telescope, want to use domestic parts to replace it is impossible! Because if those low performance parts are used, the whole space telescope can be said to be abandoned! And the most important lens problem, I guess our domestic technology can not make barely usable! I'll give you an example, boss.

Take the Hubble Space Telescope, which is about to be retired. Its lens was polished in May 1979 by Perkin Elmer of templette, Connecticut.

The mirror and optical system of the telescope are the most critical parts, so there are strict specifications in the design. In general, the accuracy of the mirror after polishing is about one tenth of the wavelength of visible light, but the space telescope can observe from ultraviolet to near-infrared.

So it requires ten times more analytical power than previous telescopes, and its mirrors are polished to an accuracy of about one twentieth of the wavelength of visible light, or about 30 nanometers.

Perkin Elmer deliberately used an extremely sophisticated computer-controlled polishing machine to grind the mirror, but failed in cutting-edge technology; Kodak was commissioned to use traditional polishing techniques to make a spare mirror (Kodak's mirror is now permanently preserved in the Smithsonian Institution).

In 1979, Perkin Elmer began to grind lenses, using ultra-low expansion glass. In order to minimize the weight of the mirror, honeycomb lattices were used. Only one inch thick glass was on the surface and one inch on the bottom.

The polishing of mirrors began in 1979 and continued until May 1981, when the progress of polishing had fallen behind and exceeded the budget, and then NASA's report began to question Perkin Elmer's management structure.

To save money, NASA stopped supporting lens production and postponed the launch date to October 1984. The lenses were all completed by the end of 1981, and were coated with 75 nm thick aluminum enhanced reflection and 25 nm thick magnesium fluoride protective layer.

As the budget for the optical telescope portfolio continues to expand and progress lags behind, doubts continue to exist about Perkin Elmer's ability to perform the follow-up work. In response to what has been described as "an indeterminate and volatile daily report," NASA extended the launch date to April 1985.

However, Perkin Elmer's progress continued to increase by one month per quarter, and the rate of deterioration was deteriorating, and the delay in time reached that every working day continued to lag behind. NASA was forced to postpone its launch date, first to March 1986 and then to September 1986. At this time, the total cost of the whole project has reached US $1.175 billion.

And a few weeks after the telescope was launched, the images returned showed serious problems with the optical system. Although the first image looks sharper than the ground-based telescope, the telescope obviously does not reach the best focusing state, and the best image quality obtained is far lower than originally expected.

The point source image is diffused into a circle with a radius of more than one arc second, instead of the standard in the design criteria: the point diffuse function image with concentric circles within 0.1 arc second in diameter.

The analysis of the pattern defects shows that the root of the problem is that the shape of the primary mirror is worn wrong. The edge of the mirror is a little too flat, which is about 2.2 microns away from the required position, but this difference results in disastrous and serious spherical aberration. The reflected light from the edge of the mirror cannot be concentrated at the same focus as the reflected light in the center.

Although this problem has been solved by technical means, the boss must have seen from this example that it is difficult to manufacture such parts as lenses in space telescopes!

Let's talk about the lens of the James Webb Space Telescope. The mass of the James Webb Space Telescope is about 6.2 tons, about half of that of the Hubble Space Telescope. The primary mirror is made of beryllium, with a diameter of 6.5 meters and an area of more than five times that of the Hubble Space Telescope. It can operate near absolute zero (equivalent to minus 273.15 degrees Celsius).

The technology and time required to manufacture such high-performance lenses are also very long, so if our company develops such high-precision lenses by ourselves, our space telescope will have to wait for a long time to go to the sky!

At present, our company has not entered such a field. If we want to develop such lenses, we need to start from scratch. Boss, you should not accept such a long wait, right?

What's more, we are not only confronted with this problem. Although we have been studying other high-performance equipment, we are still a long way from success. Therefore, we want to purchase these parts from European and American countries and complete the construction of our current space telescope and satellite.

As for the parts we have developed, they can be used in future space telescopes and various satellites. The advantage of this is that we don't have to delay the whole company's space program because of the problem of parts! " Kong Yuxiao explained in detail.

Hearing Kong Yuxiao say so, Lei Tiantang finally understood the reason why he came to him this time. It's really no wonder that the experts involved in the space telescope and satellite project have considered it very well. After all, they have already developed the action of developing these core components.It's just that the progress can't keep up with the company's space plan. We should know that the most important engine problem of the rocket has been basically completed. After some tests, we can carry out the test launch of the rocket. By then, if the satellite and Space Telescope have not been completed, the rocket can't launch anything into space at will?

"Well, you ask them to send me a detailed catalogue of the parts to be purchased, as well as their specific parameters and performance requirements. I will solve the problems of these parts!

However, I can only help you solve such problems once or twice. After all, relying on such means can not help the long-term development of the company. You are also clear about this!

Therefore, the company can increase investment in research and development of these parts! It's really slow to start from scratch for a business that we haven't dealt with, such as lens. But you can buy a company like this, and then incorporate its experience and R & D accumulation into the company. I believe that with the current strength of our company, there should be no problem in purchasing such an enterprise!

For other parts, you can also use this method to solve the initial experience accumulation process. After all, it is difficult to go from zero to one, but from one to ten is much simpler! " Lei Tiantang thought about it and said.

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