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Optical Windows

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Optical windows from a wide selection of materials for VUV-UV-Visible-NIR-IR-FIR are offered to meet various scientific instrument applications include high energy laser optical window, VUV window, IR window, high pressure high temperature chamber view port and simple white float glass windows.

- BK7 Window BK7 and N-BK7( a RoHS-compliant form of BK7) are high quality optical glass commonly used for windows, lenses, and prisms where transmission in the range 0.4m to 1.4m is desired. It is used for thermally non-critical applications. It has excellent mechanical and optical properties.

- UV Fused Silica Window UV fused silica is an excelent material for the transmission from 185nm to 2100nm. UV fused silica is also frequently used at the popular 1.064m Nd:YAG laser wavelength because of better thermal stability than BK7 glass. UV fused silica has high homogeneity and good mechanical properties. UV fused silica is ideal for uses in UV and high power laser applications.

- Borofloat and Pyrex Window Borofloat and Pyrex are borosilicate glass. Borosilicate glasses are known for having very low coefficients of thermal expansion (~3.3 10-6/C at 20C), making them resistant to thermal shock, more so than any other common glass. Windows made of Borofloat and Pyrex glass are less subject to thermal stress than BK7 windows.

- CaF2 Window CaF2, Calcium fluoride crystal provides great transmission from DUV to IR (0.13-11m). Sythetic CaF2 crystal is used to improve deep UV transmission and to increase the damage threshold.

- MgF2 Window MgF2, Magnesium Fluoride Windows offer excellent broadband transmission from the vacuum-UV to the mid-infrared (0.11 m - 8.5 m). VUV transmission makes them ideal for use at the Hydrogen Lyman-alpha line and for UV radiation sources and receivers, as well as excimer laser applications. MgF2 is a rugged material resistant to chemical etching, laser damage, and mechanical and thermal shock.

- YAG Window Undoped YAG Crystal is an excellent material for UV-IR optical windows, particularly for high temperature and high energy density application.

- Sapphire Window Sapphire crystal is featured with high-hardness - abrasion resistance; transparent in the range from ultraviolet to infrared light (200-7000nm); excelent chemical resistance and heat resistance - resist almost all kinds of acid and alkaline, heat up to 2000 C.

- Silicon Window Silicon is used as an optical window primarily in the 3 to 5 micron band and as a substrate for production of optical filters. More IR materials such as Germanium, GaAs, ZnS/ZnSe etc. are also used as IR optical windows.

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