Item # OCF Wavelength Range 400 - nm Material Polyethylene Terephthalate (PET) Coating (One Side) Indium Tin Oxide (ITO) ITO Sheet Resistance Range*

350 - 500 Ω/sq

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Sheet Size 250 mm × 200 mm
(9.84" × 7.87") Size Tolerance ±5 mm Sheet Thickness 0.2 mm (7.87 mils) Thickness Tolerance ±0.01 mm Surface Quality Coated Side: 40-20 Scratch-Dig
Uncoated Side: 60-40 Scratch-Dig Maximum Operating Temperature 120 °C
Typical transmission of one OCF Sheet. Please note that the data given is typical, and performance may vary slightly from lot to lot.
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Click Here for Raw DataTypical transmission of one OCF Sheet. Please note that the data given is typical, and performance may vary slightly from lot to lot.

Thorlabs' OCF is a pack of twenty optically clear, Polyethylene Terephthalate (PET) Film Sheets that have a conductive Indium Tin Oxide (ITO) coating deposited on one side. The coating has a sheet resistance of 350 to 500 Ω/sq*, and each sheet is highly flexible and temperature resistant up to 120 ºC.

Measuring 250 mm x 200 mm x 0.2 mm (L x W x T) in size, our ITO-coated PET sheets provide high transmission in the 400 nm -  nm spectral range. Please see the transmission plot to the right for details. The film has a surface quality of 40-20 scratch-dig on the ITO coated side and 60-40 scratch-dig on the uncoated side.

Each sheet is protected on both sides by a thin film that can be pulled off using the included red tabs. A multimeter can be used to verify the side with the conductive ITO coating. These films can be cleaned with ethanol.

Applications
ITO-coated PET films can be used in a number of different applications due to their high optical transmission and conductivity. They can be used in liquid crystal devices to provide a transparent, conductive layer that accepts the applied voltage used to realign the liquid crystal cells. The sheets are also commonly used as components for touchscreens, position sensors, electroluminescent lamps, and electrophoretic displays, as well as in electromagnetic shielding applications. 

*Sheet Resistance
Sheet resistance is defined as ρ/t: the resistivity (Ω*m) divided by the thickness (m) of the conductive ITO coating. The units are given as Ω/sq (Ohms per square) to differentiate the sheet resistance from the total resistance of some area of the film. The resistance of these films is given by:

R = Rs * (L/W)

where L and W are the length and width of the film, respectively, and Rs is the sheet resistance. For a square of the thin film, where L = W, the resistance of the film is equal to the sheet resistance regardless of size.

HOSTAPHAN® polyester films

For more information, please visit Optical PET Film Manufacturer.

HOSTAPHAN® is a film that consists of polyethylene terephthalate (PET) with outstanding physical characteristics. It is biaxially drawn and heat-set.

Because of these excellent properties, HOSTAPHAN ® is truly versatile:

*) Measured on HOSTAPHAN ® RN 25. **) Unless otherwise indicated, the values have been converted for normal pressure and temperature. ***) Values not converted to reflect normal conditions.

*) At elevated temperatures (approx. > 100°C) and in the presence of water (vapor), polyester films such as HOSTAPHAN ® tend to become brittles as a result of hydrolysis.

The polyester film HOSTAPHAN® is largely unaffected by climatic influences.

We recommend that the film is kept in the original packaging until used.
A dry dust-free storage room with an ambient temperature below 30°C is of advantage.

Avoid storing the film outdoors for any significant period of time where it will be exposed to harmful influences such as humidity or direct sunlight. The film should be transferred, in the transport packaging, to the processing area or a room with a similar climate at least 24 hours before processing.

We recommend removing the film from the original packaging immediately before processing. After removal, transporting the film roll by means of a steel bar through the core will prevent deformation or damage to the outer layers.

Short-term storage in polystyrene throughs is also an option with HOSTAPHAN® films with a thickness equal or greater than 36 µm. We know of no restriction to the shelf-life of HOSTAPHAN®. Nevertheless, we recommend that the film is processed within a year of delivery.

Want more information on Optical PET Film Supplier? Feel free to contact us.