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The difference between Optical Glasses and ordinary glasses
2021-04-23
Optical glass is the most commonly used optical material, with mature manufacturing technology and complete varieties. Generally, optical glass can transmit various colors of light with a wavelength of 0.35~2.5μm, and light beyond this wavelength range will be strongly absorbed by the optical glass.
There are many places where glass lenses are used in production and life, but can you specifically distinguish between Optical Glasses and ordinary glasses? Let us take a look together below:
Ordinary glasses: It has nothing to do with the chemical composition and the solidification temperature zone. They are obtained by the melt supercooling method. Due to the increase in viscosity, they have solid mechanical properties, and the transition from liquid to glass is reversible.
Optical Glasses are mixed with high-purity oxides of silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium, etc. according to a specific formula, melted in a platinum crucible at high temperature, stirred evenly with ultrasonic waves to remove bubbles; Cool down slowly over time to avoid internal stress in the glass block. The cooled glass block must be measured by optical instruments to check whether the purity, transparency, uniformity, refractive index and dispersion rate meet the specifications. The qualified glass block is heated and forged to form an optical lens blank.
The main difference between Optical Glasses and ordinary glasses is: Optical Glasses have a high degree of transparency, a high degree of physical and chemical properties and a high degree of uniformity and specific optical constants. These properties cannot be replaced by ordinary glasses.
With the rapid development of science and technology today, spectacle lenses made of new optical materials resin are far superior to ordinary lenses in terms of optical performance, safety performance, and protection against harmful rays.
There are many places where glass lenses are used in production and life, but can you specifically distinguish between Optical Glasses and ordinary glasses? Let us take a look together below:
Ordinary glasses: It has nothing to do with the chemical composition and the solidification temperature zone. They are obtained by the melt supercooling method. Due to the increase in viscosity, they have solid mechanical properties, and the transition from liquid to glass is reversible.
Optical Glasses are mixed with high-purity oxides of silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium, etc. according to a specific formula, melted in a platinum crucible at high temperature, stirred evenly with ultrasonic waves to remove bubbles; Cool down slowly over time to avoid internal stress in the glass block. The cooled glass block must be measured by optical instruments to check whether the purity, transparency, uniformity, refractive index and dispersion rate meet the specifications. The qualified glass block is heated and forged to form an optical lens blank.
The main difference between Optical Glasses and ordinary glasses is: Optical Glasses have a high degree of transparency, a high degree of physical and chemical properties and a high degree of uniformity and specific optical constants. These properties cannot be replaced by ordinary glasses.
With the rapid development of science and technology today, spectacle lenses made of new optical materials resin are far superior to ordinary lenses in terms of optical performance, safety performance, and protection against harmful rays.
