|Surface Quality||20-10 Scratch-Dig|
|Parallelism ||≤3 arcsec |
|Surface Flatness||λ/10 @ 633 nm|
|Clear Aperture||>90% of Dimension|
|ITO Sheet Resistance Range||50 - 80 Ω/sq|
- Three AR Coating Options for One Side
- -A: 350 - 700 nm
- -B: 650 - 1050 nm
- -C: 1050 - 1620 nm
- Indium Tin Oxide (ITO) Coating on Other Side
- Resistance Range: 50 - 80 Ω/sq (See Definition Below)
- N-BK7 Substrate
Thorlabs’ Conductive Windows are available with one of our three standard broadband antireflection coatings deposited on one surface, -A (350 - 700 nm) , -B (650 - 1050 nm), or -C (1050 - 1620 nm), and a conductive Indium Tin Oxide (ITO) coating on the other surface. ITO conductive glass windows can be used for EMI/RFI shielding or other electro-optical applications such as liquid crystals and solar cells. The ITO coating thickness was chosen to provide an excellent balance between the sheet resistance of 50 - 80 Ω/sq and optical performance. N-BK7 provides excellent transmission in the visible and near infrared portions of the spectrum.
Contact to the conductive surface can be made by copper tape, a silver epoxy-painted busbar, a silver-loaded silicone gasket, or a conductive fabric over foam gasket. Do not place wires directly in contact with the surface, or damage may result.
The resistance of these conductive windows is given by:
R = Rs * (L/W)
Where L and W are the length and width of the window, respectively, and Rs is the sheet resistance. Sheet resistane is defined as ρ/t: the resistivity (Ω*m) divided by the thickness (m) of the conductive film. Under teh specific geometry of a square, where L = W, the resistance of the conductive windows is equal to the sheet resistance regardless of size. Under this special case, the sheet resistance is given in units of Ω/sq (Ohms per square).
Please contact Tech Support for more sizes, thicknesses, and wavelength options.