Excellent performance quartz filter
quartz glass
Quartz glass is a single component amorphous material of silicon and is an excellent special industrial technology glass. Its microstructure is a simple state composed of tetrahedral structural units of silicon. Due to the high chemical bond energy and compact structure of Si-O, quartz glass has unique properties, especially transparency. Quartz glass has excellent optical properties and transmittance in the continuous wavelength range from ultraviolet to infrared.
1、 High temperature resistance. The softening point temperature of quartz glass is about 1730 ° C; C ， Available at 1100° C and 1450° Short term and long-term use of C.
2、 Corrosion resistance. Except for hydrofluoric acid, quartz glass hardly reacts with other acids. Its acid corrosion resistance is 30 times that of acid resistant ceramics and 150 times that of stainless steel. Especially at high temperatures, the chemical stability of quartz glass is unmatched by other engineering materials.
3、 Good thermal stability. The thermal expansion coefficient of quartz glass is very small and can withstand drastic temperature changes Heat quartz glass to 1100 ° C; At around C, it will not burst in normal temperature water.
4、 Good transparency. Quartz glass has good transmittance in the entire spectral range from ultraviolet to infrared. The visible light transmittance is above 92%, especially in the ultraviolet band. The transmittance can reach over 80%.
5、 Good electrical insulation. Another very important feature of quartz glass is that it can be made into high-purity materials. The metal impurity content of high-purity quartz glass is 20 * 10-6, while the metal impurity content in synthetic quartz glass is only 1× 10-6.
What is the difference between quartz filter and ordinary optical filter
To be precise, glass is amorphous, while quartz is crystalline. Amorphous crystals are isotropic, and their optical properties are directional. Some directions have a high refractive index, while others have a low refractive index. Quartz glass has the properties of glass, but apart from SiO2, it has no other components. Quartz glass has a lower density than other glasses and a lighter hand feel.
Quartz optical low-pass filter (OLPF) is mainly used in high-order digital camera sensors. Because the sensor is affected by interference of different spatial frequencies when imaging high-resolution images, it can cause the so-called Moir é fringes, resulting in ghosting or abnormal fringes in the image. By utilizing the birefringence effect of OLpF quartz crystal structure, the influence of Moir é fringes can be eliminated in image imaging. OLPF is usually composed of several pieces of quartz. Each piece has different optical functions. Some add infrared cutting, some add AR, and some use blue glass instead, which can improve the image quality of the sensor. Due to the high cost of quartz and the time-consuming nature of multiple OLPFs, OLPF has always been an expensive item among all optical filters.
Quartz glass is a single component amorphous material of silicon and is an excellent special industrial technology glass. Its microstructure is a simple state composed of tetrahedral structural units of silicon. Due to the high chemical bond energy and compact structure of Si-O, quartz glass has unique properties, especially transparency. Quartz glass has excellent optical properties and transmittance in the continuous wavelength range from ultraviolet to infrared.
1、 High temperature resistance. The softening point temperature of quartz glass is about 1730 ° C; C ， Available at 1100° C and 1450° Short term and long-term use of C.
2、 Corrosion resistance. Except for hydrofluoric acid, quartz glass hardly reacts with other acids. Its acid corrosion resistance is 30 times that of acid resistant ceramics and 150 times that of stainless steel. Especially at high temperatures, the chemical stability of quartz glass is unmatched by other engineering materials.
3、 Good thermal stability. The thermal expansion coefficient of quartz glass is very small and can withstand drastic temperature changes Heat quartz glass to 1100 ° C; At around C, it will not burst in normal temperature water.
4、 Good transparency. Quartz glass has good transmittance in the entire spectral range from ultraviolet to infrared. The visible light transmittance is above 92%, especially in the ultraviolet band. The transmittance can reach over 80%.
5、 Good electrical insulation. Another very important feature of quartz glass is that it can be made into high-purity materials. The metal impurity content of high-purity quartz glass is 20 * 10-6, while the metal impurity content in synthetic quartz glass is only 1× 10-6.
What is the difference between quartz filter and ordinary optical filter
To be precise, glass is amorphous, while quartz is crystalline. Amorphous crystals are isotropic, and their optical properties are directional. Some directions have a high refractive index, while others have a low refractive index. Quartz glass has the properties of glass, but apart from SiO2, it has no other components. Quartz glass has a lower density than other glasses and a lighter hand feel.
Quartz optical low-pass filter (OLPF) is mainly used in high-order digital camera sensors. Because the sensor is affected by interference of different spatial frequencies when imaging high-resolution images, it can cause the so-called Moir é fringes, resulting in ghosting or abnormal fringes in the image. By utilizing the birefringence effect of OLpF quartz crystal structure, the influence of Moir é fringes can be eliminated in image imaging. OLPF is usually composed of several pieces of quartz. Each piece has different optical functions. Some add infrared cutting, some add AR, and some use blue glass instead, which can improve the image quality of the sensor. Due to the high cost of quartz and the time-consuming nature of multiple OLPFs, OLPF has always been an expensive item among all optical filters.