The optical window is a double-sided parallel plane plate, which does not change the magnification of the system. Optical windows are usually used as a external protective barrier to protect optical detectors, sensors, optical lenses from the light transmission. Optical windows are commonly used in biomedicine, scientific research, underwater imaging, aerospace, optical instruments, laser optics, military defense, and other fields. Changchun Takizawa Precision Optical Instrument Co., Ltd. can provide you with customized optical windows made of various optical materials, such as N-BK7, H-K9L, B270, Borofloat, silicon (Si), ultraviolet quartz glass, and sapphire. . And can provide a variety of coatings in the ultraviolet (UV), visible light (VIS) or infrared (IR) range.
Commen Materials and characteristics of optical windows
Optical windows are sorted by optical materials:
The chemical properties of N-BK7 and H-K9L are very stable, scratch and corrosion resistant. N-BK7 and H-K9L are easy to be ground and polished and is a kind of high-quality optical material. BK7 has high homogeneity, with low content of bubbles and magazines. They have good internal transmittance in the range of visible and near infrared spectrum (330 nm-2.0 µm). When the thickness of optical materials is 10mm, the internal transmittance is greater than 90%.
According to the spectral region, quartz glass is divided into JGS1, JGS2, JGS3 (related to the Hydroxyl Group in the material). JGS1 is Fused Silica with UV-Quality. It has high transmittance in the 180-2500nm wave band (about 93.5%). JGS2 with a transmission rate of more than 93.5% is transparent in the 220-2500 nm band. JGS3 is Fused Silica with IR-Quality. It has high transmittance in the 260-3500nm wave band.
Fused silica is resistant to high temperatures up to a maximum operating temperature of 1450 ° C; resistant to acid corrosion and hardly reacts with acids; low coefficient of thermal expansion and can withstand severe temperature changes. Fused silica windows can be used in lasers, laboratory instruments, medical instruments, security monitoring, optical communications, etc.
The density of silicon substrate is low. It is half the density of germanium or zinc selenide. The weight of silicon is relatively light, which is suitable for applications requiring weight. Optical elements made of silicon are harder and less fragile than optical elements made of germanium. In addition, silicon has high thermal conductivity and has good transmittance in the near infrared, mid infrared and far infrared bands. The commonly used spectral band of silicon windows is the near infrared band 1.2-8μm, which is often used in infrared cameras, infrared Detector, infrared spectrum window, etc. In addition to silicon windows, siliocn can also be made into silicon mirrors, silicon lenses and other applicaitons, which are used in high-precision instruments in the infrared band, various laser equipment and industrial applications.
Fluoride materials have a high transmittance in the ultraviolet to far infrared range (calcium fluoride high transmission range 180 nm-8.0 µm, magnesium fluoride high transmission range 200 nm to 6.0 µm), high mechanical and environmental stability, among which Magnesium fluoride can be used in high-pressure environments. Calcium fluoride windows are commonly used in excimer lasers, spectrometers, low temperature thermal imaging systems and other instruments. Magnesium fluoride windows are generally used in the vacuum ultraviolet radiation sources, mechanical vision, microscopes and industrial applications.
Why are CLZ Precision Optics Co., Ltd. your best choice?
CLZ Precision Optics Co., Ltd. always upholds the spirit of innovation and scientific attitude. We constantly improve the methods and equipment for producing optical components. Our team has extensive production experiences. The four founders have worked and studied at the famous Singapore optical company Qioptiq. Over the years, our company has provided many domestic and foreign customers with custom spherical lenses, optical domes, optical windows, optical mirrors, optical prisms and other optical components. According to the requirements of clients, we use various optical materials required to produce coated or non-coated optical components to meet the application needs of customers. Our testing standards and quality assurance have won the trust of customers and established good relations with continuous follow-up cooperation. We always value the quality of each batch of optical components and value the trust of clients every time. Quality creates value, which is our business development philosophy.