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  • Optical Windows Laser Window Infrared Brewster - China

    price: contact company for price

    Optical Windows are flat, plane-parallel plates that are often used as

    protective barriers for electronic sensors or detectors from outside

    environments. Optical Windows should be selected based on the material

    transmission or mechanical properties of the substrate. DeLn Optics’

    Optical Windows are offered in a variety of substrates, such as Ge, Si,

    N-BK7, UV Fused Silica, ZnSe, Multiple anti-reflection coating options

    are available for the UV, visible, or IR.

    Standard AR Coating


    Wavelength Range

    Reflection Specifications


    ¼ Wave 550nm

    Ravg ≤ 1.75% 400 - 700nm (N-BK7)

    VIS 0°

    425 - 675nm

    Ravg ≤ 0.4% 425 - 675nm

    VIS 45°

    Ravg ≤ 0.75% 425 - 675nm


    250 - 450nm

    Ravg ≤ 0.75% 250 - 425nm

    Ravg ≤ 0.5% 370 - 420nm


    250 - 700nm

    Ravg ≤ 1.5% 250 - 700nm


    400 - 1000nm

    Ravg ≤ 1.25% 400 - 870nm

    Ravg ≤ 1.25% 890 - 1000nm

    NIR 1

    600 - 1050nm

    Ravg ≤ 0.5% 600 - 1050nm

    NIR 2

    750 - 1550nm

    Rave ≤ 0.7% 750 - 1550nm


    1200 - 1600nm

    Ravg ≤ 0.25% 1200 - 1600nm


    900 - 1700nm

    Ravg ≤ 1.0% 900 - 1700nm


    3 - 5um

    Ravg ≤ 2% 3-5um


    8 - 12um

    Ravg ≤ 2% 8-12um


    3 - 12um

    Ravg ≤ 5% 3-12um


    Design wavelength

    R ≤ 0.25% DWL

    Laser Windows are ideally suited for applications which require protecting laser output. Laser Windows feature a high efficiency, high damage threshold V-coating to maximize transmission at the design wavelength.


    UV grade fused silica

    Dimension Tolerance


    Thickness Tolerance


    Clear Aperture



    5 arc seconds

    Surface Quality


    Wavefront Distortion

    High Precision: λ/10 at 633nm per 25mm


    Protected <0.25mmx45deg

    AR Coating

    R ≤ 0.25% per surface at DWL


    266nm, 355nm, 405nm, 532nm, 633nm, 755nm, 785nm, 980nm, 1064nm, 1550nm

    DeLn Optics offers a wide variety of infrared windows. the available material includes CaF2, MgF2, Si, Ge, and ZnSe etc. We can offer different AR coatings covering 3-12µm.

    CaF2, MgF2, Si, Ge, and ZnSe

    > 90%

    < 1 arc min


    < λ at 633nm per 25mm

    < 0.25mmx45deg

    Ravg ≤ 2% 3-5um or Ravg ≤ 2% 8-12um or Ravg ≤ 5% 3-12um or None,

    Other coatings is available upon request

    Brewster Windows are uncoated substrates of laser grade surface quality and parallelism that are designed to be used at Brewster’s Angle (the angle at which p-polarized light incident on the surface is not reflected). At this angle, p polarization reflectance drops to zero. When used in a laser cavity, a Brewster Window reduces the cavity loss for p-polarized light compared to s-polarized light. The result of preferentially reducing the loss along one polarization axis is that the laser will emit linearly polarized light.

    N-BK7 Grade A optical glass, UV grade fused silica

    < 10 arc seconds

    λ/10 at 633nm per 25mm

    Brewster Angle:

    55° 32'

    Company Contact:

    • Phone: 8643181973695

    • Address: No.59, Yuanda Street, Erdao District,, changchun, China

    • Email: Email

    Published date: May 15, 2013 -

    • Business Description: DELN Optics (CHINA) Manufacture highest quality crystals and optical


      Including YAG Series, Nd:GdVO4, YVO4, KDP, KTP, HGTR KTP, DKDP, BBO, LBO, Ti: Sapphire, LiNbO3, LiTaO3, BaF2, MgF2, CaF2 crystals and prisms, lenses, Cylindrical Lenses, filters, polarizes, mirrors, beamsplitters, windows, waveplates and micro optics.

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