200°C Sapphire Zero Length

Description

The single crystal sapphire windows have excellent optical, physical, and chemical properties. The hardest of the oxide crystals, sapphire retains its high strength at high temperatures. Sapphire has a low coefficient of thermal expansion and low fluorescence, good resistance to thermal shock and scratching, making this an excellent material for IR transmitting optics and robust applications.

C-cut sapphire is selected for Torr Scientific sapphire viewports to minimize the effects of birefringence. The ultra high vacuum (UHV) CF versions are offered using high-grade 304L or 316LN stainless steel flanges. Non-magnetic viewports are offered for low-energy applications or surface science applications needing low magnetic fields. The non-magnetic viewports use a non-magnetic weld ring instead of the regular kovar weld ring. Flanges in 304L stainless steel are used for the high vacuum KF and ISO viewports.

TSL viewports are manufactured in cleanroom conditions and helium leak tested, cleaned, and packed to UHV standards. The rugged construction of the sapphire viewports allows repeated bake-out to 200 °C with UHV performance, whilst the window offers broadband optical transmission through vacuum UV, visible to near infra-red. Various anti-reflective coatings to match customer reflectance requirements are processed at TSL and available as options listed in the AR coated viewport data sheets. Non-standard viewports can be manufactured on request, including re-entrant style microscope/camera viewports. Annealed copper gaskets and other component accessories are also supplied by TSL.