Optical glass is a commonly used optical material with mature manufacturing technology and complete varieties. Generally, optical glass can transmit various colors of light with a wavelength of 0.35~2.5m, 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 lenses and ordinary lenses? Let’s take a look at it together:
Ordinary glass: It has nothing to do with the chemical composition and the curing temperature range. They are obtained by the melt supercooling method, and the viscosity increases It has the mechanical properties of a solid, and the transition from liquid to glass is reversible.
Optical glass is made of high-purity silicon, boron, sodium, potassium, zinc, lead, magnesium, calcium, barium and other oxides mixed according to a specific formula, in a platinum crucible Melt at high temperature, stir evenly with ultrasonic to remove bubbles; then slowly cool down over a long period of time to avoid internal stress in the glass block of the laser focusing lens. 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 lenses and ordinary lenses is that optical lenses have a high degree of transparency, a high degree of uniformity in physical and chemical properties, and specific and accurate optical constants. These properties cannot be replaced by ordinary lenses.
With the rapid development of science and technology today, spectacle lenses made of new optical materials and resins, regardless of their optical performance, safety performance, and protection of the eyes from harmful rays, are far Better than ordinary lenses.
The main raw material of optical lenses is optical glass, which has a higher refractive index than resin lenses. Therefore, under the same power, optical lenses are thinner than resin lenses. The light transmittance and mechanochemical properties of the optical lens are relatively good, the refractive index of the constant laser protective lens and the physical and chemical properties are stable. The optical lens has superior properties, is not easy to scratch, and has a high refractive index. The higher the refractive index, the thinner the lens. However, the glass is fragile and the material is heavy. When choosing a frame, you should try to choose a smaller frame to ensure the comfort of wearing.
In recent years, China has gradually become an important optical glass and optical lens manufacturing base in the world. Foreign companies have accelerated their entry into China and established joint ventures with domestic companies. After fierce market competition, foreign-invested companies have become the main players in China's optical glass manufacturing industry, followed by private companies.
The main materials of optical lenses are colorless optical glass, colored optical glass, infrared optical materials, crystal materials, glassy materials, plastic materials and other optical materials. The transparency, physical and chemical properties are highly uniform and specific and precise optical constants.
Optical laser collimator lens cleaning requires professional equipment to clean the dust, oil, sweat, fingerprints and other dirt on the workpiece. During the installation and cleaning of the lens, any sticky matter, even nail marks or oil drops, will increase the absorption rate of the lens and reduce the service life of the lens. Therefore, necessary precautions must be taken when cleaning optical lenses. The lens should be placed in a dry and tidy place for testing and cleaning, and finger cots or rubber gloves should be worn to install the lens.
In the process of cleaning the optical lens, it is necessary to remove the contaminants of the lens without causing further pollution and damage to the lens. Do not touch the film when taking the lens, but hold the edge of the lens to avoid sharp equipment to avoid scratches on the surface of the lens. First, use an air ball to blow off the floats on the lens surface, and then use a cotton ball dipped in acetone to clean the lens under light. If acetone cannot remove all the dirt, you can also use acid vinegar to clean the optical lens.
The main raw material of optical lenses is optical glass, which has a higher refractive index than resin lenses. Therefore, under the same power, optical lenses are thinner than resin lenses. Optical lenses have relatively good light transmittance and mechanical and chemical properties, a constant refractive index, and stable physical and chemical properties. No matter optical lens or resin lens, plus multi-layer coating treatment will make the glasses feel more comfortable to wear. The principle is to coat the surface of the lens with coating materials with different refractive indexes such as magnesium fluoride or quartz, so that the reflected afterglow interferes with each other and can reduce the reflection.
The optical lens has superior properties, is not easy to scratch, and has a high refractive index. In recent years, China has gradually become an important optical glass manufacturing base in the world. Foreign companies have accelerated their entry into China and established joint ventures with domestic companies. After fierce market competition, foreign-invested companies have become the main players in China's optical glass manufacturing industry, followed by private companies.