Brief history of fax machine
1850, there was another British inventor named F. Bekkar, who greatly improved the structure of the fax machine. He replaced the clock and pendulum structure with a "roller and screw" device. This improved structure works a bit like a lathe, where the roller rotates rapidly and the manuscript sent by fax rotates on the roller. The scanning needle advances slowly along the screw along the axial direction of the drum, and scans the pattern on the surface of the drum in a spiral manner. This drum fax machine has been used for more than one hundred years. 1865, an Iranian named Abakaj developed a fax machine that he could use in practice according to the principle and structure of fax machine proposed by Bain and Bekkar, and took his fax machine to Paris, Lyon, Marseille and other cities in France for fax communication experiments. The invention of photo fax machine has a wide demand for the transmission of news photos and photographic photos. Many scientists devote themselves to the research of photo fax machines. 1907165438+1On October 8th, a French inventor, Edward Belin, presented his research achievement-photo fax. Edward Belin (1876- 1963) works in the building of the French Photographic Association, and under the building of the French Photographic Association, it happens to be the starting point and ending point of the French telecom line from Paris-Lyon-Bordeaux-Paris. This provides a unique condition for Belan's research. Belan's painstaking research has obtained permission from the telecommunications department to use this communication line for experiments at night. Beran studied and experimented in the basement of the building for three years, and finally made a photo fax machine. Not satisfied with his initial success, Edward Belin continued to study the fax machine. 19 13 years, he made the world's first portable fax machine for news interview. 19 14, a French newspaper published news photos transmitted by fax for the first time. Photo fax changes pointer contact scanning into photoelectric scanning, which not only greatly improves the fax quality, but also makes photo fax possible with the cooperation of photoelectric scanning and photographic plate making. 1925, Bell Research Institute of AT&T Company developed a high-quality photo fax machine. 1926 officially opened the transcontinental wired photo fax service, and in the same year opened the transatlantic wireless photo fax service with Britain. Since then, countries in Europe, America and Japan have successively opened photo fax services. Since then, photo fax has been widely used in news organizations to transmit news photos, and then extended to the military, public security and medical departments to transmit military photos, maps, criminal photos, fingerprints, X-rays and so on. The earliest pictures recorded by color fax machine were published in the first illustration of Bell System Technical Report in April 1925. In fact, this picture is composed of three independent transmissions by color filters in the order of red, green and blue, and then superimposed. Later, someone used the same basic technology and took some automation operations to develop a fax device that can copy color pictures. 1In August, 945, at the Potsdam Conference, the color photos of Truman, Stalin and Attlee were successfully transmitted from Europe to Washington by radio. But it has not been used to open color fax service.