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    4. 福州高特光电科技有限公司

      These Fused-silica Windows are in UV grade material (Spectrosil B or equivalent) and usable down to 170nm. They have excellent chemical and radiation resistance, and are usable up to 1050°C, and have very low fluorescence. They are listed both coated and with a multiplayer AR-coating for 248-400nm.
      When the broadest transmission spectrum is required (from 185nm to over 2 microns) together with high durability, all for a reasonable cost, these windows are ideal. Fused silica is physically robust and resists chipping and scratches. The coefficient of thermal expansion is quite low, so these windows maybe subjected to higher levels of thermal shock than glass or sapphire can withstand. Circular, square and rectangular shapes available.
       

      Standard Specification

      Material: BK7 grade A optical glass
      Diameter Tolerance: +0.0, -0.1mm
      Thickness Tolerance: ± 0.2mm
      Clear Aperture> 85%
      Parallelism<1 arc minute
      Surface Quality: 60-40 scratch and dig
      Flatness: λ/4 per 25mm @632.8nm
      Wavefront Distortion: λ/4 per 25mm @632.8nm
      Bevel: 0.25mm x 45°
      High precision specification and coaitng are available upon request

       

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