Nanjing Co-Energy Optical Crystal Co Ltd
![]() An optically flat, transparent optical material that allows light into a mechanism is an Optical Window. A wide range of optical windows made from materials such as N-BK7, Fused Silica, Sapphire, Germanium, Zinc Selenide, Calcium Fluoride, and Magnesium Fluoride. Parallel optical windows can get with laser grade surface quality and surface flatness for common or very demanding interferometer measurements. Sapphire Optical Window is useful for UV, visible, and IR wavelengths, with transmission from less than 200 nm out beyond 5 microns. These windows are made with extreme precision has a wide variety of applications in making Aircraft windows, Submarine windows, FLIR, Medical/Life Sciences, and Industrial OEM, Intelligence, surveillance & reconnaissance(ISR). Silicon Window has good transmission in the range from 1.2 to 7.0 µm, with slight or no distortion of the transmitted signal. Owing to its low density (about half that of Zinc Selenide or Germanium) Silicon has an advantage over other IR materials, making it ideal for optical systems where weight is an important factor. Laser Window provides a high degree of transmission of specified wavelengths for use in laser applications or safety requirements. It may be designed for either laser transmission or laser safety purposes. These Windows may possibly be used to isolate a laser beam, reflecting or absorbing all other wavelengths.
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![]() A bandpass filter is a device that is primarily used for allowing the wanted frequency components from any particular signal. At the same time, this device also removes unwanted frequency components. These devices are used in the domain of signal processing. Bandpass devices also help in reducing or eliminating background noises of the interfacing signal. A Bandpass Filter also combines the properties of the Low Pass Filter (LPF) and the High Pass Filter (HPF). There are also many other applications or uses of bandpass devices. And some of those uses are mentioned below.
![]() A window in an optical system helps to provide a clear aperture for transmitting the desired radiation, so as too keep two environments separate. Most optical windows are made using flat plates of a transparent medium such as glass, crystal or polymer. Optical Windows should be chosen based on mechanical or optical properties of the substrates such as UV Fused Silica, Calcium Fluoride (CaF2), Magnesium Fluoride (MgF2), Potassium Bromide (KBr), Sapphire, Silicon (Si), Sodium Chloride (NaCl), Zinc Selenside (ZnSe), or Zinc Sulfide. UV Window and IR Window is designed for optimal performance in the Ultraviolet (UV) and Infrared (IR) spectrums. These windows are used in many different laser applications. UV windows are ideal for being used in laser applications. With advancements in UV LED technology, there has been significant changes in the horticultural lighting landscape. UV optics and UV led light systems are used in the industry to reach performance goals and optimize growing. Infrared windows and optics are made using optical crystals and are used as windows for infrared spectroscopy. For instance, germanium IR windows are commonly used in IR imaging systems typically operating in the 2 µm to 14 µm spectral range. Zinc Selenide (ZnSe) windows is also an excellent choice for any IR application. IR window is ideal for use in FTIR spectroscopy, thermal imaging, FLIR medical systems and many other such applications. Most reputed manufacturers provide optical windows using a wide selection of materials for VUV-UV-Visible-NIR-IR-FIR to meet various applications and help you in choosing the right optical window to meet your requirements. Sapphire crystal material is an excellent substrate for a wide array of sturdy applications. As it is capable of high transmission ranging from 150nm up to around 5µm, it is suitable for a range of ultraviolet, visible and infrared applications. Some of its noteworthy features are as follows:
Uses & Applications
Sapphire crystal material is often utilized in infrared and far infrared military equipment. It is used in night vision infrared and far infrared sight, night vision cameras and other equipment and satellite, space technology instrumentation. As sapphire UV is capable of reducing reflections regardless of where the light comes from, it is often used in Sapphire Lenses to provide purer vision with more vivid images and improved lens aesthetics. It is also an ideal choice for power lasers, optical prisms, optical windows, UV and IR windows and lenses. Custom Sapphire Lenses are also used in medical sensors and instrumentation. These lenses are capable to withstand frequent use and sterilization procedures and many other industry applications. Optical Lenses are visual components designed to focus or deviate light. Optical Lenses are used in a various applications from microscopy to laser processing. These lenses which may comprise of a single or multiple elements are utilized in variety of industries, including life sciences, imaging, industrial, or defence. When light passes through a lens, it is influenced an underlying layer of the lens. UV optics are lenses containing single or multiple elements and designed to operate in ultraviolet spectrum. There is a wide variety of standard UV Lenses available in the market today, including singlet lenses such as PCX or plano-convex lenses, achromatic lenses, or ball lenses. PCX lenses are optical lenses with a positive focal length. These lenses are best-suited for focusing applications that utilize monochromic illumination in an array of industries like robotics, defense, or pharmaceuticals. Now, coming to the silicon optics which is a evolving technology wherein data is transferred among computer chips via optical rays. These optical rays are capable enough to carry more data in less time as compared to electrical conductors. Silicon optical components are utilized in numerous infrared applications, including IR spectroscopy or NIR imaging. The low density of silicon optics is ideal for use in weight-sensitive applications. Silicon optical lenses are available in the variety of sizes or focal lengths. Silicon photonics are highly utilized in computer communication as there the optical links have an extended reach from centimetre to meter. Sapphire is known as the hardest natural substance next to diamond and owing to its extreme hardness, toughness, and high strength it is abest-material choice for high-performance optics. There are many advantages of sapphire optics that out stand it from other optical materials like extreme surface hardness, wide optical transmission band from UV to Mid IR, high electrical resistance, high thermal conductivity for a non-conductor.
Laser diode is a semiconductor device that can directly convert electrical energy into light. The use of laser diodes has radically increased in both commercial and industrial setups. Laser diode’s small size, ruggedness, and of course its optical characteristics have increased its usage. Laser diode optics are apposite for high definition TV (HDTV) development, cable TV transmission, and for medical applications. Laser mirrors are superior quality mirrors used in laser resonators and other optical setups. There are different standards which should be met by the resonator of a laser which contains mirrors which are low reflection losses or a precise transmission in a certain wavelength range, high optical quality of the surface, and good resistance against high optical intensities. Dielectric mirrors built on multi layer structures are used as laser mirrors. Additionally, Laser mirrors can also be used to reflect light outside the laser resonator. Surface quality plays a significant role for most laser mirrors which is primarily used to avoid beam distortion. Laser mirrors should be highly reflecting for better laser wavelength. Now, let’s discuss and trace the difference between hot and Cold mirrors. A Hot mirror is a specific dielectric mirror which is often used to protect optical systems by reflecting infrared light back into a light source, while allowing visible light to pass. On the other hand, cold mirrors reflect the entire visible light spectrum while efficiently transmitting infrared wavelengths. Both types of mirrors can be designed to be inserted into the optical system at an incidence angle ranging 0 to 45 degrees. Hot mirrors are helpful in applications where the accumulation of waste heat can damage components. Both mirrors can be employed as dichroic beam splitters with laser systems to reflect visible light wavelengths.
IPL Light guide plays a key role in cosmetic laser and other laser applications. IPL is commonly a laser application used for removing unwanted hair from the body. These applications use varied range of wavelengths to target different chromospheres- the target molecules found in the skin.
In the recent years, there has been increased use of light-based technologies in dermatology. Laser and intense pulse lights are used to tray a variety of cutaneous conditions, including vascular and pigmented lesions, tattoos, scars etc. These procedures are becoming popular worldwide as they proven to be successful in treatment of various skin conditions. This has led to increase in the demand for existing products, new innovations and clinical applications. Most manufacturers offer custom IPL light guide in a wide array of materials and coatings to suit different waveband requirements. For instance, custom BK 7 or equivalent light guides provide high internal reflection to minimize the loss of transmitted light and is considered as an excellent choice for IPL applications Custom UV fused silica light guides is also an excellent alternative to BK 7 or equivalent for pigmentation treatment. Custom sapphire light guides is also commonly used as it is an extremely hard material that offers increased durability and great resistance to damage. Optical Windows are flat and optically transparent plates that helps to maximize transmission in a specified wavelength range and minimize reflection and absorption. These windows are typically used for safeguarding optical systems, electronic sensors, detectors, other sensitive optical components from being damaged by light. They are popularly used in imaging applications. They are also used as protective displays for variety of industrial or environmental applications. There are many different kinds of optic windows offered but reputed manufacturers for different purposes such as sapphire windows, Silicon Window, Germanium Window, Fused Silica Window, Magnesium Fluoride Window, and Calcium Fluoride Window etc. Different optical windows have different characteristic suitable to different purposes in the varied industries.
Sapphire is a crystal which synthetically grown in in large, somewhat cylindrical, boules. It is extremely hard and scratch resistant and hence sapphire windows are completely resistant to common scratches. It also effectively transmits throughout the visible and mid IR spectrum.Sapphire window is commonly used to protect more delicate optics sealed behind them such as commercial and military aircraft have a sapphire window protecting vision systems. Submarines use it to salt water abrasion. It is also used for many laser and LED applications. Germanium window are preferred for IR applications at a broad range of wavelengths and imaging applications. Fused silica windows are incredibly thermal shock resistant and carry good chemical resistance and optical transmission properties from ultra violet to infra-red. Magnesium Fluoride window is ideally used for UV radiation sources and receivers as well as in laser applications. As Magnesium fluoride is resistant to mechanical and thermal shock, laser damage and chemical etching. It is ideal for application where transparency is required across multiple wavelengths simultaneously, such as spectroscopy or fluorescence imaging of samples under vacuum and is also used for varied biological and military imaging applications. For the selection and/or evaluation of a suitable window material, one needs to consider different factors in mind, so as to properly assess the performance of an optical window. One should look for leading industry manufacturers to buy high quality optic windows for varied industrial applications. First, you need to know that sapphire windows are accessible in a number of diverse grades, or it is available in different quality levels, which is designed specifically to meet the needs of a certain application. Understand it like this, the top most grades can be used for the highly demanding optical applications, while lower grades are appropriate for structural or mechanical applications.
The optical properties of both natural and synthetic sapphire have the same crystalline structure and each crystal has three axes – a, b & c. Here, when light is transmitted along c-axis utmost desirable optical properties can be achieved. Since it is a solo crystal, not any of the sapphire can be molded, drawn or cast. But synthetic sapphire, on the other hand, can be "developed" into specific shapes to meet the requirements of distinct applications. Sapphire window has transmission range from UV to Mid-IR (0.15-5.5µm). Scratches can look worse than they really are and sapphire can be polished even the extreme ones. Optical window is flat optically and mechanically. Optically transparent plates that are usually designed to maximize transmission in a specified wavelength range, while minimizing reflection and absorption. They are often used to protect optical systems and electronic sensors from an outside environment. Silicon windows are ideal for IR applications and are popular for the 1.2 - 7μm spectral regions due to their low cost and low density. Features Ideal for IR Applications in the 1.2 - 7 µm Spectral Range Available Uncoated or anti-reflection coating for <2% Average Reflectance from 3 - 5 µm Perfect for weight sensitive applications |
Cissy Zhu
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January 2020
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