Optical Precision Window has a polished surface and an unpolished surface of the electromagnetic spectrum, such that the desired unaltered portion of the spectrum passes into the optical instrument. These Optical windows are often custom made from different substrates to serve a variety of industrial applications, health, and medical application, then defense and military application. Most of the optical windows are made as flat plates of a transparent medium. These windows can be a UV window or an IR window and are designed to function in an ultraviolet or Infrared spectrum. The UV window or ultraviolet window has an application in the laser application while the infrared spectrum is used in thermal imaging, health and medical procedures, forward-looking infrared (FLIR), and Fourier-transform infrared spectroscopy(FTIR) spectrophotometry. When selecting an optical Precision Window, some factors should be taken into consideration like optical properties or substrate’s mechanical. The substrate materials that can be used include Potassium Bromide (KBr), Sapphire, Silicon (Si), Sodium Chloride (NaCl), Zinc Selenide (ZnSe), or Zinc Sulfide, UV Fused Silica, Calcium Fluoride (CaF2), and Magnesium Fluoride (MgF2).
Sapphire Windows is very useful for tough environmental and physical factors like high pressure, high temperature, corrosive chemicals, and acid. It is extremely hard and durable than standard optical glass and has a transparency of 170nm to 5.5µm. Just as the name sounds, it is meant from sapphire material and operates at a wavelength of 150 to 5000nm. The sapphire window is commonly used as a viewport to help in viewing inside of vacuum chambers, or chambers containing high temperature.
Magnesium Fluoride (MgF2) Window
Magnesium Fluoride(MgF2) Windows are employed in UV radiation spectrum and UV radiation receivers, in combination with the excimer laser. Magnesium Fluoride is resistant to mechanical and thermal shock, laser damage, and chemical activities. MgF2 Windows have an excellent transmission in the UV reaching transmission. Magnesium Fluoride (MgF2) windows are polycrystalline and have a superior UV transmission range from 120nm to 7 microns. It is one of the hardest fluoride materials making it perfect to use in applications with severe conditions, water, industrial lasers optics, and chemical trauma.
Silicon window is a high-performance material mostly used in consumer and industrial products including health care, aerospace, personal care, electronics, transportation, construction, and beverages.
Germanium window is an opaque, UV, and visible light spectrum with a wide infrared transmission range, it can also be used in is used in thermal imaging. It has minimal chromatic aberration due to low dispersion. At Alpine research optics you can get any lens of your choice.
Borosilicate window is also a high power light source application and they are mostly applicable for both hot and cold mirror substrates.
Fused Silica Window
Fused Silica Windows is a low distortion, excellent parallelism, low bulk scattering, and fine surface quality spectrum that is used for a wide variety of demanding applications, including multiphoton imaging systems and intracavity laser applications. They have a high Extremely low bulk scatter and autofluorescence, Available in high flatness λ/20 or general-purpose λ/10, with <30 arc-second parallelisms, a Fine, low scatter surface up to 10-5 scratch-dig and Broadband AR coatings for UV, visible or IR applsubstrate
Calcium Fluoride Windows
Calcium Fluoride windows are an optically transparent spectrum from 180 nm to 8 µm, making them ideal for applications such as spectroscopy or fluorescence imaging in the UV, visible, and IR wavelengths. They are also applicable in excimer laser applications, with low absorption and high damage threshold, and Transparent in UV, Visible, and IR. They come with <1 arc-minute parallelism and a Low chromatic aberration compared to other IR materials.