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Donghai Hexuang Silicon Material Co. LTD

Company address: No.1 Tengfei Road, Hongzhuang Town, Donghai County, Lianyungang City

Contact number: 13585379258

Company email: 1784852507@qq.com

Quartz sand

Optical glass sand

In recent years, some new varieties of optical glass have been developed, such as glass with good transmittance to infrared and ultraviolet. Glass with extremely high or low refractive index or dispersion; Glass that changes color with light intensity; A magneto-optical glass in which the plane of polarization rotates as light passes through the glass along the direction of the magnetic line of force
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In recent years, some new varieties of optical glass have been developed, such as glass with good transmittance to infrared and ultraviolet. Glass with extremely high or low refractive index or dispersion; Glass that changes color with light intensity; Magneto-optical glass in which the plane of polarization rotates when light passes through the glass along the direction of magnetic force lines; Electrooptic glass with birefringence under the action of external electric field and so on.
 
With high quality quartz sand as the main material. Add auxiliary materials appropriately. Because rare earth has a high refractive index, low dispersion and good
Optical glass
Optical glass
The chemical stability, can produce optical glass, used in the manufacture of advanced cameras, cameras, telescopes and other advanced optical instruments lenses. For example, a lanthanum glass containing lanthanum oxide lao360%, boron oxide b2o340% has excellent optical properties, is an indispensable optical material for the manufacture of advanced camera lens and periscope lens. In addition, radiation-proof glass can be produced by using the radiation-proof properties of some rare earth elements.
 
The raw materials for optical glass production are some oxides, hydroxides, nitrates and carbonates, and phosphate or fluoride is introduced according to the requirements of the formula. In order to ensure the transparency of glass, the content of coloring impurities must be strictly controlled, such as iron, chromium, copper, manganese, cobalt, nickel and so on. It is required to weigh accurately and mix evenly when mixing. The main production processes are melting, forming, annealing and testing.
(1) There are single crucible intermittent melting method and pool kiln (see kiln) continuous melting method. Single crucible melting method can be divided into clay crucible melting method and platinum crucible melting method. No matter what kind of smelting method is used, it is necessary to stir with agitator, and strictly control the temperature and stirring, so that
Optical glass
Optical glass
The liquid glass reaches a high degree of uniformity. Clay crucible can melt most crown glass and flint glass, low cost, and used when the melting temperature of glass exceeds the service temperature of platinum. Platinum crucible can melt high quality, clay crucible has serious erosion of glass, such as heavy crown, heavy barium flint, rare earth glass and fluorophosphorous glass. Platinum crucible is heated electrically, generally using silicon carbon rod or silicon molybdenum rod electric furnace. However, high frequency heating can be used to manufacture glass with large crystallization tendency, rapid cooling and certain requirements for atmosphere.
Since 1960s, countries have adopted platinum-lined continuous kiln smelting, which greatly improves the output and quality of optical glass, which is the main trend of the development of optical glass production technology at present.
(2) The forming method of optical glass has classical broken pot method, rolling method and pouring method, but at present, more and more widely used leakage forming (with a single crucible or continuous melting out of the liquid), can directly pull the rod or drop pressure type or leakage forming large size blank, improve the utilization rate of material drops and yield.
③ Annealing In order to eliminate the internal stress of glass to the maximum extent and improve the optical uniformity, a strict annealing system must be developed for precision annealing.
(4) The index of inspection and determination are: optical constant, optical uniformity, stress birefringence, fringe, bubble, etc.
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