Which country in the world first owned photographic technology, and in which year was it invented?

1838 France came from the end of the world to ask questions, hoping to help you. "Who was the first person to take pictures?" In a broad sense, it is Niels 1838. Daguerre, a French physicist, is studying the method of preserving images on objects, but this research will remain irrelevant for a long time. One day, he suddenly found an image left on the object, so he removed the nearby chemicals one by one to see what caused this phenomenon. As a result, he found that the "great hero" was actually mercury left after a thermometer broke-photography technology was born.

In Daguerre, the silver plate photography method is to expose the steel plate coated with silver iodide in a black box, then develop it with mercury vapor and fix it with salt. This method is actually a negative metal image, but it is very clear and can be preserved forever. Because the exposure time takes about 20 to 30 minutes, early photography often takes pictures of still lives, landscapes and portraits.

1839 On August 9, 2009/kloc-0, at the joint gathering of the French Academy of Sciences and the Academy of Fine Arts, the French government announced that it would give up the invention patent of silver plate photography and make it public. People usually take this day as the beginning of photography.

As early as 1838, Daguerre wanted to publish and sell his photographic works. After several efforts, Daguerre finally turned to arago, the permanent secretary, astronomer and member of the French Academy of Sciences, and gained his appreciation. Arago was the first person to see that "the invention of photography will make the greatest contribution to the progress of art and science", and he was also the first person to suggest and urge the French government to purchase the right to invent photography.

Frenchman Neil Pace is also a collaborator of Daguerre. He was four years older than Daguerre and died six years before the publication of Daguerre's Silver Photography.

Carl Porter, an English inventor, was the pioneer of negative film from negative film to positive film. 1835, he began to try out drawings coated with silver chloride or silver nitrate as photosensitive materials, took negative photos in the camera, and then printed them by sunlight. He named his method "Carol Photography". After the news of Daguerre's invention of silver plate photography was announced, he raised the issue of invention priority, but it was too late.

Daguerre's silver disc photography absorbed the achievements of people's long-term exploration in this field. As early as 13 years before the invention of silver photography, Nilpus took the world's first permanent photo-Goldsworth. Nilps painted a white asphalt that hardens under light on Minch alloy plate and exposed it for 8 hours. Because of the long exposure time and blurred image, his invention could not be popularized.