Who invented the first camera in the world?

Photography is a technology that can record tangible things truthfully. In ancient times, in order to record the shape of objects, people had to use painting methods. But no matter how clever a painter is, it is difficult to record the prototype of an object without distortion.

In order to solve this problem, people invented photography by using the principle of optics. The most primitive camera is the so-called pinhole photography. This is the practice of reflecting the image of an object to the wall through a pinhole.

Such as the famous painter Dada. Finch correctly reflected the scenery on the wall in this way. But this kind of pinhole photography itself can't be recorded, so it can only be projected. Da. In order to record pinhole projection, Finch once drew a projection image with a pencil as a record.

1802, an Englishman, Victor, first used the photosensitive effect of silver nitrate to coat silver nitrate on paper and made a photographic film. 1827, Frenchman Knibbs sprinkled asphalt powder on a tin plate or glass plate, and then coated it with a layer of oil or wax to make it translucent. In the sun, after a long period of irradiation, you can leave a white shadow of the real thing and take photos that will not disappear. However, every time I take such a photo, I have to spend 6 to 8 hours in the sun. This complicated process is obviously not suitable for practical use.

By 1839, photography technology has made new progress. A French scholar named Daguerre came across a new photosensitive material. While studying photography, Daguerre accidentally put a silver spoon on a metal plate treated with iodine. After a while, Daguerre found that the shadow of the silver spoon was actually printed on the plate. This phenomenon surprised him greatly. So he deliberately ground the metal plate, coated it with iodine, and photographed it with the lens. Sure enough, he took a thin shadow. This success greatly encouraged Daguerre's confidence.

Daguerre continues to March towards the final difficulty of breaking through photography technology. Another accidental discovery helped him a lot. One day, Daguerre went to the medicine cabinet to look for medicine, and suddenly he saw that the image on the film exposed in the past became very clear. What is the reason? In order to find the answer, he put an exposed film in the medicine box every night. The next morning, he took out a bottle of medicine while taking out the film. He thought, if an effective drug is taken out of the box and put into the exposed negative, it is not clear.

But to Daguerre's surprise, when all the medicines in the box were taken out, the negative was still clear. This can not help but make Daguerre very surprised. In order to find out the reason thoroughly, Daguerre rummaged through the box again and again, and finally found some small mercury beads in the box. He immediately realized that this miracle must be caused by mercury. After Daguerre's analysis, he thought that the evaporation of mercury affected the negative film and made it develop well because of the high temperature in the box.

In order to confirm this judgment, Daguerre put the exposed film in a darkroom and tested it with mercury vapor, and the expected results were obtained. In this way, Daguerre solved the key technology of photography-development. Then, he solved the fixing technology, thus completely solving the technical problems of photography.

Daguerre's invention is basically the same as the present photographic technology. So the invention of photography technology should be attributed to Daguerre.