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        HOME >PRODUCT DISPLAY >PRODUCT DETAIL
        PRODUCT PIC
        Windows
            Windows are optical glass with polished faces that are relatively parallel. They are used to protect laser output. Always windows are AR coated to eliminate reflection, so AR coated windows offer improved transmission when used in industrial displays or computer monitors. Their high transmission makes them ideal for most industrial and laser protecting applications.
        • DETAIL
        • STANDARD PRODUCT
        • BASIC PROPERTIES
        •     CRYSTIK offers all types of windows made of different materials. Special size and materials are also available upon request. In addition, we provide various coating on optical windows.


        • Material

          BK7 Grade A optical glass, UV grade  fused silica

          Dimension Tolerance

          +0.0/-0.2mm

          Thickness Tolerance

          ±0.2mm

          Surface Quality

          Standard: 60/40
          High Precision: 20/10

          Clear Aperture

          >90%

          Wavefront Distortion

          Standard: <[email protected] per 25mm
          High Precision: <[email protected] per 25mm

          Parallelism

          Standard:<1 arc minute
          High Precision:<10 arc seconds

          Chamfer

          Protected<0.5mmx45°

          Coating

          Uncoated, available

        • Material

          Refractive Index

          Transmission
          Range(um)

          Thermal Expansion
          Coefficient(10-6/K)

          Density(g/cm3)

          BK7

          [email protected]

          330-2100nm

          7.5

          2.52

          Fused Silica

          [email protected]

          185-2500nm

          0.58

          2.20

          Sapphire

          [email protected]

          180-4500nm

          8.4

          3.98

          Calcium
          Fluoride

          [email protected]

          170-7800nm

          18.85

          3.18

          Magnesium
          Fluoride

          no=1.3836(405nm)
          ne=1.3957(405nm)

          120-7000nm

          13.7||a; 8.48||c

          3.17

          Silicon

          [email protected]

          1200-7000nm

          2.55

          2.33

          Germanium

          [email protected]

          2000-14000nm

          5.5

          5.33

          ZnSe

          2.4028(10600nm)

          550-19000nm

          7.6

          5.27

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