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Caf2 vacuum viewport is often used in spectroscopic windows and lenses due to its high transmission from 250nm to 7μm.
Calcium fluoride low absorption and high damage threshold makes it a popular choice for excimer laser optics. Calcium fluoride's low index or refraction allows it to be used without an antireflective coating.
The Knoop hardness of calcium fluoride is 158.3. TECHSPEC® Calcium Fluoride (CaF ) Windows manufactured from vacuum UV grade calcium fluoride are commonly found in cryogenically cooled thermal imaging systems.
Vacuum quartz viewports are components for viewing or optically sensing samples or process devices in a vacuum chamber or system. Window materials for vacuum viewports and access doors include optical grade glass, quartz, and sapphire.
The important factor for making choice include optical application, seal type, connector fitting specification, bake or operating temperature and pressure range et..
Htc vacuum viewport has higher abrasion resistance, transparency to ultraviolet radiation well and low coefficient of thermal expansion which makes them very resistant to thermal shock. Htc viewports are offered with CF type, ISO type and KF Flange and Customized Flange. Htc viewport window surfaces offer a minimum of distortion , resistant to thermal shockand provide maximum ultraviolet transmission for most applications.
Htc vacuum customized quartz viewport:
Quartz glass material: Anti-UV penetration rate(300nm~380nm)