Chapter 850 ID card with photo
The next afternoon.
Niu Wei, Jiang Xuan, and Zhan Mao came to Hanyang City to report to Luo Chong. Luo Chong only gave them some instructions, issued official uniforms and seals, and let the three of them leave.
As for Jing Yun, this guy is now in Dongxin County, which is a bit far from Hanyang City, so he didn't come here specifically. He can pick him up when the fleet heading south reaches the Dongxin County dock.
After arranging these three people to take up their posts, Luo Chong immediately set off for the comprehensive research institute on the island in the middle of the lake. This time he went there to personally test the effect of the microscope and to prepare the institute to come up with something new.
After spending a day to arrive at the research institute, Luo Chong finally saw the microscope that had just been made.
Ao Fei personally led Luo Chong to the laboratory before he began to introduce this optical instrument.
"Chief, this is the optical microscope I made according to your requirements. It is made of bronze. The bottom mirror base, the stage in the middle, the microscope cantilever on the side, and the lens barrel on the cantilever.
According to your request, I installed a small mirror with adjustable angle at the bottom mirror base, that is, a reflector, and a condenser with a short focal length in the middle of the stage to focus the light reflected by the reflector and then project the light onto the slide.
Chief, look here, there are two steel slide clamps on the stage to fix the slide.
And this one is the same as the mirror base . The cantilever of the microscope has a knob on it. By rotating the knob, you can roughly adjust the height of the lens barrel, thereby achieving zooming, and there is another zooming method.
Chief, you see, although this eyepiece is fixed, the objective lens below can be replaced. I have equipped this microscope with six objective lenses of different magnifications, which are specially placed in a small wooden box. If you need to change the objective lens, just unscrew it with your hands and replace it with another one.
In addition, there is a thumb knob on the side of each objective lens. Through this small knob, you can also adjust the upper and lower height of the lens in the objective lens barrel, so as to achieve fine-tuning of the overall focal length. "
Well, it looks good, but I don't know how it works!" Luo Chong nodded with satisfaction.
To be honest, the style of this microscope is designed by Luo Chong based on the shape of the microscope he had seen in junior high school biology class. The basic functions and shape are almost exactly the same. The only difference is probably that the structure of the lens barrel itself is not quite the same.
The objective lens of the microscope I had seen in my previous life was replaced at any time through a turntable, but the one made by Ao Fei required the installation of an additional objective lens. Although the effect was similar, it was definitely more troublesome to use.
"Chief, would you like to try it and give me some suggestions?" Ao Fei saw that Luo Chong seemed to be quite satisfied, so he boldly invited Luo Chong to try it.
"Okay, what have you tried to observe with this microscope before?" Luo Chong nodded and asked casually.
"Well, I took a photo of green hair. It was the green hair that grew on the rice after it was left for a long time. It looked flat to the naked eye, but I didn't expect that after it was magnified 1,600 times, it actually looked like peanuts. It looked like many small balls on the intertwined roots.
I also used it to look at my fingers. When the originally smooth skin was observed under a microscope, many grooves could be seen. In fact, they were fingerprints.
"
Ao Fei said a lot of things eloquently. It seemed that he had indeed observed many things with a microscope during the period before Luo Chong arrived. After all, they were doing scientific research. This group of people could be said to be the most curious group of people in the Han tribe. Now that they had a window to observe the new world, they were curious and wanted to see everything.
"Then did you see any living things?" Luo Chong asked curiously. This kid had seen so many things, didn't he see any bacteria or cells that could move?
"No," Ao Fei answered honestly.
"Well, let's talk about the experiment later. Let's talk about other things first. I want you to make a special portrait camera. It has to be super small. I want to popularize ID cards with portraits among us." Luo Chong put aside the microscope for the time being and suggested it to Ao Fei.
"ID cards with portraits? Does everyone have to make one?" Ao Fei immediately became interested. If this works, wouldn't everyone know that he invented photography in the future? This is the best publicity!
"Not everyone does it, only adults do it, because children grow up faster and look different every year. Even if you take a photo, it has no reference value. Adults basically have a fixed appearance, but at least they have to take a new photo every ten years. For the elderly, they can take a photo every twenty years, which is basically enough.
Adding a photo to an ID card is actually used for identity recognition to prevent someone from using someone else's ID to defraud the tribe of various benefits, or to engage in other illegal activities. Do you understand?" Luo Chong briefly explained the purpose of adding a photo to an ID card.
"I see. What material do you plan to use to make ID cards? Our current photography can use photographic paper. Do you plan to use photographic paper? This is indeed cheaper." Ao Fei thought for a while and said.
"No, paper is easy to copy, and its durability is too low. It will be damaged in a few years. It will be meaningless in ten or twenty years. It is also easy to be copied. Although photography technology is not yet popular, if civilian cameras are sold in the future, it is more likely that ordinary people will copy it." Luo Chong directly rejected the idea of using paper-based ID cards.
Paper-based ID cards are actually OK. The most important thing is that they are low-cost, but now the Han tribe has no plastic, so there is no plastic sealing technology. This makes preservation a problem, so the paper-based ID card plan was directly eliminated by Luo Chong.
"Then what does the chief mean? Use metal, or like the original silver plate wet photography?" Ao Fei asked tentatively.
"Yes, I want to make an ID card out of copper sheet, as big as a card, and then plate silver on the upper right corner of the copper sheet to form a small rectangular silver layer. Then I will use the silver plate wet photography technique to take a photo and directly develop the photo into the small silver-plated rectangle. In the other blank spaces, I will use a steel stamp to stamp out the name, household registration and other information.
I roughly calculated the cost. Not counting the photographic equipment and so on, the base material of the ID card alone would cost no more than five cents, which is the price of a meal. The silver used for silver plating is even less. It is estimated that the silver of a silver dollar can plate hundreds of such ID cards. All the people can afford this price. Even if we don't let the people spend money, the tribe will pay for it, and we can afford it.
I thought about it. Everyone is forced to make an ID card from adulthood. The first time is free. The cost is paid by the tribe. The people will pay for the subsequent productions. After all, after ten years of adulthood, they have already married and had children. This expense is not a problem for the people. It's just the cost of a meal. "Luo Chong said what he had thought long ago.
"There is no problem with this. Silver plate photography is a technology that we have eliminated. Now we are just picking it up again. But the camera needs to be redesigned. The main reason is that the photos are relatively small. In addition, the photos are at the corner of the bottom plate, which is relatively biased. The light entry route of the lens needs to be redesigned. "After listening to Luo Chong's idea, Ao Fei quickly analyzed it from a technical perspective in his mind.
"Yes, that's why I came to you. I plan to stay here for a few days. You have to get something out within a week. I will study this microscope you made in the next few days." Luo Chong nodded with satisfaction and said.
"Okay, no problem, don't worry, chief. It won't take a week. I can get it out in two days." Ao Fei immediately said with a big promise.
"Okay, let's go to the office first. I'll draw the size of the copperplate ID card and the position of the photo for you, and then you can design the camera according to the size of the film and the position of the photo. "
As Luo Chong spoke, he led Ao Fei to the office of the Comprehensive Research Institute, and then took a pencil to draw on paper.
The size of the copperplate ID card is the same as that of the modern second-generation ID card, which is the size of a bank card. On the right is the silver-plated headshot area, and the information on the left is similar to that of the second-generation ID card. From top to bottom, they are name, gender, date of birth, and the address is changed to native place, and the ethnicity is changed to title. The ID number is also retained, and the issuing authority and validity period on the back.
Such an ID card is much better than the previous bamboo slips "household register". After all, bamboo slips can only record text, and due to the size of the text, the things that can be recorded are also very limited. In addition, there is basically no anti-counterfeiting function. Even if someone wants to make it privately, there is no way, and the official itself has no ability to distinguish.
After clearly marking the style and size of the ID card, Ao Fei quickly found someone to make a sample.
He first made a piece of wood in the same size, then hollowed out the position of the photo and embedded a piece of frosted glass of the same size as the photo for the optical experiment of the camera, and then made some photo paper cuttings. It was made to the same size as the ID card, ready for other subsequent experiments, and then began to draw on paper to conceive the structure of the camera.
As for the actual sample of the ID card, Ao Fei handed it over to other groups in the institute. When they first started to do silver plate wet photography, they used copper plates as negatives, then silver-plated the entire frame, and finally used chemicals for photosensitive treatment for shooting.
Now this is actually similar to that time. It still uses copper plates, but the full-frame silver plating has been changed to partial silver plating. There is no other difference.
The Comprehensive Research Institute also has a metal machinery group, and they also have a metal plate rolling machine, but it is hand-cranked. Although the efficiency is not high, it is no problem to use it to make copper plates. When the mechanical group got the size required for the ID card, they quickly started trial production.
The two groups acted separately. Ao Fei led the optical group to complete the design link on the drawing that day, and then began to contact the material group to collect the various materials needed, preparing to start making prototypes the next day.
The mechanical group trial-produced the copper plate according to the size required by Luo Chong, and made Several sets of different thicknesses were prepared, and then Luo Chong was asked to choose personally.
Luo Chong compared several sets of copper cards of the same size and different thicknesses, and finally chose a one-millimeter thickness.
A one-millimeter-thick card is slightly thicker than a bank card, but for longer durability and bending resistance, it is obviously more appropriate to make it one millimeter thick, and the cost is not high. Such a copper card, if you only count the weight, is not as much as a five-cent coin.
In terms of the final font stamping, Luo Chong directly asked people to use the original version of the metal movable type mold to cast a new set of steel, using the smallest font size, that is, each word is five millimeters long and wide.
With a manual punching machine, the card is fixed in the prefabricated slot, and then the corresponding fine steel movable type is replaced in the stamping template above. Using the manual pressing method, the desired text can be pressed on the ID card.
The mechanical group made this set of manual stamping equipment and hundreds of blank copper cards that day. As for the movable type made of fine steel, this needs to wait until tomorrow, because the movable type mold has been kept in Hanyang City. It needs to be sent from there, but Luo Chong happened to forget to take it when he came.
The next morning, Ao Fei began to take the blueprint to the master of the carpentry group to build a camera, and the mechanical group also began to use molds to cast movable type made of fine steel.
According to Luo Chong's requirements, at least two sets of commonly used characters in fine steel movable type must be cast. This is for those whose names use the ABB structure, just like Chai Duoduo
, the commander of Qianniuwei. This Duoduo is the same character that appears at the same time. If only one set is cast, it is obviously impossible to solve the problem when encountering such a name, so preparing a few more commonly used ones is just basic operation. The next day, Ao Fei and the carpentry group made a special camera, and then began to use glass and photographic paper for testing.
The mechanical group also cast enough movable type, and then began to silver-plated the copper card.
Speaking of metal silver plating, the most familiar person in the entire Han tribe should be Qubing. You know, it was Qubing who accidentally came up with the chemical silver plating technology when he was doing the development experiment.
This time, Qubing, as Luo Chong's personal guard, also came to the research institute. When he heard that the copper sheet was going to be silver-plated, this kid immediately began to make plans.
"We are not doing full-frame silver plating, so we need to limit the fluidity of the agent. I suggest using gelatin to create a square frame outside the portrait area, or using other materials. The most important thing is to create a frame, and it is best if this frame does not react with the agent."
Seeing that Gu Bing was the one who developed photography before, the other groups were very cooperative and produced a qualified silver-plated copper card before dinner that day. Then, it only needed to be tested by Ao Fei's special camera before it could be officially put into use.
(End of this chapter)
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