Optical glass can be used in the manufacture of optical instruments in the lens, prism, mirror and window, etc.. Component composed of optical glass is a key element in optical instrument. Optical glass is the basis and important part of the optoelectronic technology industry.

Optical glass lens molding technology is a kind of high precision optical components processing technology, it is the softening of the glass into high precision mold, under heating and pressurizing and anaerobic conditions, one-time direct molding out is achieved using the requirements of optical parts. This technology has now become one of the most advanced optical parts manufacturing technology in the world.

So let's look at the advantages of the optical glass molding process for the manufacture of optical parts:

1, does not need the traditional rough grinding, fine grinding, polishing, grinding edge centering and other processes, can make the parts to achieve higher dimensional accuracy, surface roughness and surface roughness;

2, optical parts and mounting reference parts can be made into a whole.

3, can be molded small aspheric lens array;

4, it can be very easy to achieve the precision of the production of precision aspheric optical parts;

5, as long as the precise control of the process parameters such as temperature and pressure, can ensure the dimensional accuracy and precision of the optical parts;

6, can save a lot of production equipment, tooling accessories, plant area and skilled workers, so that a small workshop can have a high productivity.

The mirror is a cold light balancing filter. The characteristics of micro reciprocal degree absolute value is smaller, a major role in regulating the color temperature of the light source.

Sky mirror to change the color and the magnitude of the effect is small, slightly elevated light source color temperature, due to the cold filter increased the effect of light source color temperature slightly, so it can be used to correct photographic images of the slightly reddish, orange tendency, in order to obtain the true color reduction, can also be deliberately to reduce the color temperature of a light source, in pursuit of a cool effect.

Optical glass is a kind of glass, which can change the direction of light transmission, it can be used for the manufacture of optical instruments in the lens, mirror, etc.. There are many kinds of optical glass. Optical glass is mainly produced by the quality of quartz sand, this kind of glass like some cameras, telescopes, etc..

According to Industry Research Institute released data show that in 2013 China's optical glass manufacturing industry imports and exports amounted to $, down 7.24%. Among them, imports of US dollars, down 17.26% year on year; exports of US $, an increase of 0.25%. To achieve a trade surplus of $, the trade surplus increased compared to the U.S. dollar in 2012, an increase of 52.36%.

2014 1-8 months, China's optical glass manufacturing industry to achieve a total import and export of $1 billion 226 million 620 thousand, of which imports of U.S. dollars, exports of $, a trade surplus of $1 billion 226 million 620 thousand.

Since 2013, China's optical glass industry exports gradually showed a slow growth trend. In 2013, China's export volume of optical glass was $, an increase of 0.25%. To achieve a trade surplus of $- $, a few years ago to reverse the optical glass industry import and export trade deficit situation.

With the sharp appreciation of the RMB, China Optical glass manufacturing industry trade environment has been a major impact, the appreciation of the renminbi makes the enterprise suffered profits at the cost of two-way attack, leading to decline in export profits, hit the enthusiasm of export enterprises and of optical glass manufacturing enterprises to inventory process caused certain effect; on the other hand, the appreciation of the renminbi also weaken the price advantage of "made in China", making China Optical glass manufacturing industry competitiveness in overseas markets decline.

But on the other hand, downturn, although the traditional economic development in developed countries, China Optical glass manufacturing products to slowing demand, but due to the emerging market economy countries especially the rapid development of the BRIC countries, and these countries of optical glass products market demand strong, this part makes up the impact of China Optical glass manufacturing industry by slowing demand in developed markets.

Overall, with the improvement of the international economic environment in the next few years, as well as the increasing demand for emerging market countries, China's optical glass manufacturing industry as a whole trading environment for the better.

Whether it is an inorganic material or organic material made of optical lenses, in the daily use, due to the friction with the dust or grit (silicon oxide) will cause the lens wear, scratches on the surface of the lens. Compared with the glass sheets, the hardness of organic materials is relatively low, and it is easier to produce scratches. Through the microscope, we can observe to scratch the surface of the lens is mainly divided into two, one is due to the gravel scratches, shallow and small, wearing glasses is not easy to detect; another is generated by the larger gravel scratches and deep and surrounding rough in regional center will affect vision.

Then through the lens coating will reduce wear and tear, you can improve the quality of the lens and extend the life of the lens.

In the process of optical lens installation, if the method is not correct, it will make the lens is contaminated. Therefore, to comply with the operating procedures.

If a large number of lenses need to be installed and removed, it is necessary to design a fixture to complete the task. The specific fixture can reduce the number of contact lenses, thereby reducing the risk of lens contamination or damage.

In addition, if the lens is not installed correctly, the laser system will not work properly, or even will be damaged. All carbon dioxide laser lenses should be installed in a certain direction. So the user should be sure that the correct direction of the lens.

Choose glasses is mainly according to the environment in the use of their work and life needs and glasses, glasses should have the performance, in the opted for glasses of the corrected visual acuity, distance, and glasses, should also consider the performance characteristics of different optical lenses are not the same as what.

Optical lens color

Vision, color and distance of the visual requirements of high and stable work, such as students, car drivers, surgeons, art workers, etc. should be selected colorless and transparent optical lenses. If the driver of the car wearing a heavy color of the lens, not sensitive to changes in distance, the distance is not accurate, easy to cause trouble.

Transmittance of lenses

Optical lens with multilayer anti reflective film, colorless optical lens and non spherical optical lens light transmittance is better.

Thickness of lens

And diopter lens size, and lens refraction rate, and frame size and shape, and pupil size and shift photocentric amount about, and astigmatism axial, and the lens properties (Bump).

Weight of lens

Glass lens is more important than the resin lens, which is related to the lens material. The same lens material, than great Bibi heavy weight, large volume than the small size (with lenses and shape and size.

Lens hardness

Glass lens than the resin lens high hardness, wear resistant.

Strength of lens

The resin lens is higher than the glass lens, and the impact is not easy to be broken.

Special function of lens

Such as anti ultraviolet, anti electromagnetic radiation, anti infrared, high temperature, oil resistance, acid and alkali, anti dispersion, anti deformation (ultra thin non spherical lens), anti glare and other functions. Such as electricity, gas lenses, lenses with computer, underwater lens, lens for fishing is different.

Lens shape

Choose the frame after the optical lens shape.

Whether it is an inorganic material or organic material made of optical lenses, in the daily use, due to the friction with the dust or grit (silicon oxide) will cause the lens wear, scratches on the surface of the lens. Compared with the glass sheets, the hardness of organic materials is relatively low, and it is easier to produce scratches. Through the microscope, we can observe to scratch the surface of the lens is mainly divided into two, one is due to the gravel scratches, shallow and small, wearing glasses is not easy to detect; another is generated by the larger gravel scratches and deep and surrounding rough in regional center will affect visual acuity test method for estimation and testing of abrasion resistant film wear resistance of the most fundamental method to be of clinical use, let glasses wearers for a period of time, then observed with a microscope and compared with lens wear. Of course, this is usually in the new technology before the formal promotion of the method used, at present we commonly used more rapid and intuitive test method is:

1) scrub trial will be optical lens are placed in filled with gravel propaganda (set of gravel size and hardness) and in certain under the control of back and forth friction. After the end of the fog, the amount of light before and after friction was measured and compared with the standard lenses.

2) test the steel wool with a specified steel wool, under certain pressure and velocity, in the number on the surface of the lens friction to and with Haze Meter before and after the friction test lens light diffuse reflection, and compare it with the standard lens.

3) the anti reflective coating on the surface of the lens is a very thin inorganic metal oxide material (thickness less than 1 microns), hard and brittle. When plated on the glass lens, the film base is relatively hard, gravel in the above across. The film is less prone to scratches; but anti reflection film is plated on the organic lens, the film base is relatively soft, gravel across the film. The film is very prone to scratches.

Can change the direction of light propagation, and can change the relative spectral distribution of ultraviolet, visible or infrared light is called optical glass. It is a kind of inorganic material, which is a kind of inorganic material by means of refraction, reflection, transmission of light through the way, or by changing the intensity or spectral distribution of light. Stable optical properties and high optical uniformity.

Optical glass is a lens, prism, mirror, window and other glass materials used in the manufacture of optical instruments or mechanical systems. Including colorless optical glass (usually referred to as optical glass), colored optical glass, radiation resistant optical glass, radiation proof glass and optical quartz glass, etc..

Optical glass has a high degree of transparency, chemical and physical properties (structure and properties), with a high degree of uniformity, with a specific and accurate optical constants. It can be divided into silicate, borate, phosphate, fluoride and sulfur compounds. According to their variety, mainly in refractive index (nD) - Abbe value (VD) to map the location classification. Traditionally nD>1.60, and nD<1.60 VD>50, all kinds of glass vd>55 constant (k) crown glass and other types of glass set for flint (f) of glass. Crown glass generally convex lens, a concave lens for flint glass. Usually crown glass belongs with the alkali borosilicate glass system, light crown glass belonging to the aluminum silicate system, crown glass and barium flint glass belongs to non alkali borosilicate glass system, the vast majority of flint glass belongs to lead the potassium silicate system. With the development of the application of optical glass, the variety of optical glass is expanding, and its composition includes almost all the elements in the periodic table.

Cut-off filter product advantage:

1, through the belt and the cut with a very steep transition;

2, cut with a very deep;

3, long pass, short pass and band-pass spectral characteristics can be;

4, pass through the belt is very uniform;

5, independent control of band pass filter edge steepness;

6, the passband and the band have wide free spectral range;

7, accurate and repeatable start and stop wavelength;

8, greatly improve the spectrum of the ripple so that it has a flat gain.

The main optical parameters of the product such as: wavelength positioning accuracy, half wave bandwidth accuracy, waveform coefficient (rectangular degree), peak transmittance and other indicators to achieve the level of international similar products.