In the past 10 years, photoelectric information technology has made great achievements. In order to meet the requirements of this rapid development, we must seek new breakthroughs in a wide range of frontier areas, such as transmission, switch, data storage and display technology. Due to the close combination of modern optical industry with electronic industry, information technology and communication technology, the application of optoelectronic technology, photonic technology and electronic industrial technology in optical manufacturing has broken the traditional concept in optical element and optical processing industry, such as from imaging element to functional element, and from passive element to active element. At present, aspherical surfaces, diffractive optical elements, WDM wavelength division multiplexing devices manufactured with very high accuracy film technology, and very high accuracy optical elements manufactured with a new generation of lithography equipment are the mainstream of the new generation of optical elements. In a sense, the current photonic technology is still in the development stage.

At present, there are dozens of types of optical materials: colorless optical glass and colored optical glass, infrared optical materials, optical crystals, optical quartz glass, artificial optical quartz crystal, glass ceramics, optical plastics, optical fibers, glass for aviation agricultural production system, opalescent diffuse glass and related liquid materials. Optical glass is widely used in imaging elements. The quality of plastic lens can meet the quality requirements of glass lens in many places. Especially in the eyewear industry, there is a trend to replace it. However, due to its low refractive index, high scattering, nonuniformity and other limitations, it is not as widely used as optical glass.

Environmental protection series optical glass

With the increasing awareness of human beings to protect the living environment, developed countries have successively promulgated and implemented environmental protection laws. If it is prohibited to use lead oxide and arsenic oxide harmful to human body in glass, it is required to use environment-friendly optical glass in optical instruments and photoelectric products. In order to meet this requirement, major manufacturers of optical glass in the world have developed a variety of series of environment-friendly optical glass in recent years. Among them, Japan's OHARA company has provided 31 varieties of lead-free and arsenic free environmental optical glass to the market since 1993. In 1996, 93 varieties of environmental optical glass were produced, and in 1997, 111 varieties of optical glass in the product catalog were completely free of lead and arsenic, which has been in a relatively advantageous position. Japan's HOYA Company has launched 31 kinds of environment-friendly glass in 101 varieties in the product catalog since 1994, and has all realized lead-free and arsenic free environment-friendly optical glass in 2002. SHOTT, a German company, began to develop environment-friendly glass in the 1980s. In 2000, 67 of the 87 varieties in the product catalog belonged to lead-free and arsenic free environment-friendly optical glass. Therefore, the environmental protection of optical glass has become the inevitable trend of the development of the world optical material industry. In view of chemical stability, high refractive index, high dispersion and price, PbO should be added into ordinary optical glass; In order to improve the atmosphere conditions, clarify and remove bubbles, As2O3 should be added into ordinary optical glass. However, titanium oxide is a kind of variable valence oxide. Excessive addition will greatly increase the difficulty of production technology. The problem is that the transmissivity decreases in the short wave range, and the devitrification resistance, transparency and defoaming resistance of glass become worse. In particular, the platinum melting crucible is easy to pollute the glass and make the glass tinted, and the tinting degree cannot meet the requirements when the product is exported. Hubei Gobijia Optoelectronic Technology Co., Ltd.

New optical glass in the future, including optical glass, electronic glass, semiconductor glass ceramics, laser glass, I line high uniform glass, high transmittance and low optical coefficient glass, DWDM film filter, glass ceramic lining, ultra-low expansion glass ceramics, glass discs (for magnetic head floating test), glass ceramic lining for PLC and negative thermal expansion glass ceramics that may be used in the field of optoelectronic information technology in the future, These products are being developed and researched by some large foreign companies, and some of them have been applied. Optical materials have been developed into highly accurate and multifunctional optoelectronic information materials. Among them, high-precision sheet glass, high-quality lanthanide optical glass production process, low melting point optical glass, aspheric molding process, environment-friendly optical glass, high-density optical disk glass, phosphate optical glass, infrared glass for thermal imaging, optical glass for low light level night vision, special optical fiber glass, gradient refractive index glass, magneto-optical and acousto-optic glass, etc, Both are new optical materials and advanced production processes developed and produced abroad in recent years. The innovative achievements of these technologies meet the needs of the development of military and civilian high-tech. There is still a big gap between China and foreign countries in the development of new optical optoelectronic information materials, among which the high-precision sheet glass, low melting point optical glass, aspheric molding process, phosphate optical glass and high-density optical disk glass of liquid crystal display substrate are still blank in China. The variety, quality and smelting technology of environment-friendly optical glass and lanthanide optical glass need to be further improved, and many products need to be further developed.