• Bonda Technology
  • Bonda Technology
  • Bonda Technology
  • Bonda Technology
  • Bonda Technology
  • Bonda Technology
  • Bonda Technology

Windows

Windows are optical glass normally with polished faces that are relatively parallel. They are used to protect laser output. Windows are often AR coated to minimize reflection. AR coated windows offer improved transmission when used in industrial displays or computer monitors. The high transmission makes them ideal for most industrial and laser protecting applications.

Brewster Windows

Brewster windows are windows designed for use at Brewster's angle (usually uncoated). This is the angle where only incident p-polarized light has 0% transmission loss. They are an economical option for coupling linearly polarized light into sealed optical systems and to select the polarization of light traveling in optical cavities.

Brewster's angle can be calculated using the following equation: Brewster's angle =Arctan(nw/na)

Where nw and na are the indices of refraction for the window and the ambient respectively. na is usually assumed to be 1 for air.

  • Specification
  • Materials BK7, UVFS, FS, CaF2, MgF2, BaF2, ZnSe, ZnS, Ge, Si, Sapphire, Cleartran, Infrasil, Suprasil
    Angle of Incidence Brewster's Angle
    Surface Figure 1/4 lambda at 633 nm of Both Surfaces
    Surface Quality 20-10 or better of Both Surfaces
    Dimensional Tolerance (+) 0.0 to 0.01mm
    Thickness Tolerance (+/-) 0.01mm
    Wedge Brewster less than 10 seconds, Elliptical less than 3 minutes
    Bevels 0.02" at 45 degree typical
    Clear Aperture Exceeds Central 85% of diameter

    Square and Round Window

  • Specification
  • Material BK7 Grade A optical glass
    Dimensional Tolerance (+) 0.0 to -0.2mm
    Thickness Tolerance (+/-) 0.2mm
    Clear Aperture >80%
    Parallelism 1 arc minute for standard; 10 arc seconds for high precision.
    Surface Quality 60/40 for standard; 20/10 for high precision
    Wavefront Distortion 1 lambda for standard per 25mm@633nm; 1/10 lambda for precision per 25mm@633nm.
    Chamfer Protected <0.5mm x 45 degree
    Coating Uncoated, available

    Fused Silica Windows

  • Specification
  • Material BK7 Grade A optical glass
    Dimensional Tolerance (+) 0.0 to -0.2mm
    Thickness Tolerance (+/-) 0.2mm
    Clear Aperture >80%
    Parallelism 1 arc minute for standard; 10 arc seconds for high precision.
    Surface Quality 60/40 for standard; 20/10 for high precision
    Wavefront Distortion 1 lambda for standard per 25mm@633nm; 1/10 lambda for precision per 25mm@633nm.
    Chamfer Protected <0.5mm x 45 degree
    Coating Uncoated, available

    MATERIALS

    • Semiconductor Si wafers and Solar wafers
    • Silicon on insulator (SOI) wafers
    • Mask blanks (soda lime and quartz)
    • Glass wafers (Pyrex 7740, quartz, soda lime, etc)
    • AIIIBV compounds (GaAs, GaP, InP, InAs, etc)
    • Sapphire wafers
    • Sputtering targets
    • Thin films-Oxide, nitride
    • Packing boxes for crystal, wafers, filter, chip, etc
    • Optical component

    SERVICES

    • Fabrication of soda lime/quartz photolithographic masks
    • Silicon microfabrication (wet etching, dry etching and wafer bonding)
    • Consultancy of fabrication process
    • Characterization of microdevices/microsystems
    • Consultancy of microfluidics and biological microdevices



        Service Hotline:
        Tel.: +65-6515 8750
        Fax : +65-6515 8795
        Email: sales@bondatek.com