Many people know that glass is widely used. Ordinary glass is what people contact more, and people pay more attention to optical glass around us. Since optical glass is widely used, people must know the specific common sense, so as to better help people choose glass. In order to make you know more about glass, let’s analyze the list of optical glass materials? What is the classification of optical glass?
List of optical glass materials
Ordinary glass (Na2SiO3, CaSiO3, SiO2 or Na2O · Cao · 6sio2). Quartz glass (glass made of pure quartz as the main raw material, the composition is only SiO2). Tempered glass (with the same composition as ordinary glass). Potassium glass (K2O, Cao, SiO2). Borate glass (SiO2, B2O3). Colored glass (some metal oxides are added in the manufacturing process of ordinary glass. Cu2O – red; CuO – blue-green; CDO – light color; Co2O3 – blue; Ni2O3 – dark green; MnO2 – blue purple; colloidal Au – red; colloidal Ag – color).
What is the classification of optical glass
1. Colorless optical glass
It has specific requirements for optical constants and has the characteristics of high transmittance in the visible region and no selective absorption coloring. According to the Abbe number, it is divided into coronal glass and flint glass, and all kinds are divided into several kinds according to the refractive index, which are arranged in turn according to the refractive index. It is mainly used as lens, prism and mirror of telescope, microscope and camera.
2. Anti irradiation optical glass
It has great absorption capacity for high-energy irradiation. There are high lead glass and cao-b2o2 system glass. The former can prevent γ X-ray and X-ray irradiation. The latter can absorb slow neutrons and thermal neutrons. It is mainly used in nuclear industry and medical fields as shielding and peeping window materials.
3. Irradiation resistant optical glass
In a certain γ Under X-ray and X-ray irradiation, the transmittance in the visible region changes less, and the variety and brand are the same as that of colorless optical glass. It is used to manufacture optical instruments and peep windows under high-energy irradiation.
4. Colored optical glass
Colored optical glass is also called filter glass. It has selective absorption and transmission properties for specific wavelengths in ultraviolet, visible and infrared regions. According to spectral characteristics, it is divided into three categories: selective absorption type, cut-off type and neutral gray; According to the coloring mechanism, it can be divided into three categories: ion coloring, metal colloid coloring and sulfur selenide coloring, which are mainly used in the manufacture of optical filters. Ultraviolet and infrared optical glasses have specific optical constants and high transmittance in ultraviolet or infrared bands. They are used as ultraviolet and infrared optical instruments or window materials.
5. Optical quartz glass
With silica as the main component, it has the characteristics of high temperature resistance, low expansion coefficient, high mechanical strength and good chemical properties. It is used to manufacture prisms, lenses, windows and mirrors with special requirements for transmission in various bands. In addition, there are photomask plates, liquid crystal display panels, image optical disc base sheet glass for large-scale integrated circuit manufacturing; A magneto-optical glass in which the polarization plane rotates when light passes through the glass along the direction of the magnetic line of force; When light passes through the glass transmitting ultrasonic wave in a certain direction, it will diffract, reflect, converge or shift the optical frequency.
List of optical glass materials? What is the classification of optical glass? After the above description, everyone has also found the answer. Optical glass is very common around you. People must carefully understand the differences, so that everyone can choose products that better meet their own needs. In short, there are many optical glasses, and people should make targeted choices.