A Brief History of Optical Coatings

Dec 28 08:38 2011 David Yvon Print This Article

In1892, Taylor from United Kingdom,(HD Taylor’s famous Cook, designer of Triplet lens) found that, the surface of burnt telescope by weathering turns to purple.

Comparing with the new lens ,Guest Postingit is found that more light can be through. There is low refractive coatings Zinc oxide on the glass which is eroded by the weak acid, it can reduce the reflectivity of the glass surface.This new discovery about burning lens makes people know the coatings’ function and produces coating technology, the future use of chemical workers in weak acid, weak acid from the laboratory-generated surface gel layer, to 1930 or so, technology has been significantly progress. 1931: • Carl Zeiss company in Germany published an excellent large-aperture lens Sonnar F2.0, the lens reflector rarely, by the unique composition of three groups of six lenses, coating technology to be developed.IN 1935,Germany • Carl Zeiss invented anti-reflective coating processing technology ,Cai avoid the A. Smakula heated in a vacuum evaporation of the low refractive index fluoride film, the birth of the anti-reflection film processing method. In 1936, University of California, USA JDStrong the glass placed in a vacuum, heat through evaporation increases and the effect of calcium fluoride (CaF2), successfully made the artificial anti-reflection film. For these reasons, the combination of two lenses glued lens can be separated to increase the lens design freedom.In 1938: U.S. Eastman Kodak Company to complete the HECTA lens coating process. 1939-1943 years: Carl Zeiss has successfully implemented • Layer 2 and Layer 3 by coating. 1945: German company Leitz, Leica standard lens in the first use of coating technology, starting from SUMMITAR50mmF2 lens (the lens introduced in 1939), the implementation of the lens coating.In 1945,In Germany, Frankfurt • Hai Deke's hair Ming Luolai Automat (4 type) camera 75mm F3.5 lens, Carl Zeiss • • Jena Tessar, Zeiss Ao Putuo • Tessar and John Knight Xenar3 section Carolina became the first lens coating lens. 1946: Chiyoda Optical Precision (now Minolta) Spring in the demi-lens camera Minolta Seml A film on the first use of magenta. Minolta SEMI is Japan's first camera with the lens coating (JCII history finds the camera), the subsequent introduction of coating technology companies have been active in the catalog records "are coated," gives the impression of a "bright clear lens" .During the 1964 to1967, in the area outside the use of photographic equipment, such as measuring instruments photographic plate and TV camera lens, etc., I layer coating is characterized by almost total elimination of the glass surface of the reflector, which is the active use after the effective optical one of the technologies. 1964: the year the Olympic Games held in Tokyo in October, the room the games need to be more bright screen, Fuji Photo ray machine companies by NHK TV commissioned the development of multi-layer lens coating technology used to achieve electron beam lens coating EBC (Electron Beam Coating).In the vacuum coating Magnesia, the use of high melting point of the thermal evaporation of the material type, with the electron gun melting method, completed by the Japanese technology is made up of 11 layers of multi-layer coating, `published in December 1971 8mm camera, Fuji The EBC Fuji card single8E8000 Shannon 8-64mm F1.8 lens and launched in September 1972 with a 35mm SLR camera photography, rich fujiki ST801 with exchangeable lens, is the use of Shannon Fuji EBC lens technology.In 1970, West Germany Cologne Fair (photokina), the camera companies have developed multi-layer coating technology stage, using the lens of this new technology are: Asahi Optical's Pentax with interchangeable lenses, Nikon F Japanese optical industry with interchangeable lenses, Canon F1 with new products such as interchangeable lenses. 1971: multi-layer coating can be said that the first year (full launch of the first year), each plant of the previous camera models may be developed for the lens and the new interchangeable lenses, each multi-layer coating. The superiority of multi-layer coating has been well-known, high processing costs are also cause for concern, but the camera lens using multi-layer coating has been the general trend, more research is considered an excellent multi-layer coating technology practical.In 1972, West German Carl Zeiss • Fair in Cologne introduced a series of multi-layer coating of Zeiss lenses. The sale of the lens in use "T *" tag, which is the famous red mark "T *" lens.Regardless of camera manufacturer or camera, plant, they all try to use multi-layer coating technology. As a result, it increases the lens design freedom, and the lens wide-angle lens, zoom lens and other products of complex composition emerged. In 1994, the introduction of multi-layer coating companies to re-evaluate how to improve the image quality. There is also an active introduction of non-spherical lens, more than 10 groups composed of many pieces of high power zoom lenses has become easy to implement.The company's lenses are distinguished from the use of single or multi-layer coating as they are required. In the lens processing,, it is different with initial lens. The quality of image is better than the color photographic, and it relies on high-dimensional coating and tries to promote the development of the lens to a higher level.Source:http:// www.mhcocm.com

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David Yvon
David Yvon

MHC INDUSTRIAL (CHINA) CO, LTD,specializing in integrating development research and production of the optics coating material, the metal material, the rare earth material and so on, is a comprehensive enterprise.

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