Transcript
DATA SHEET Rugate notch filters for laser protection applications Orion Photonics has developed a range of laser protection coatings based on thin film rugate notch filters. Rugate technology is a design concept that utilises a single film with a continuously varying refractive index. This allows the design of filters with spectral characteristics that are very difficult or impossible to design using conventional techniques. Using this technology, Orion Photonics can supply filters exhibiting high visible transmission while simultaneously affording protection against specific laser wavelengths in the visible spectrum to optical density in excess of OD5. Rugate filters can be combined with edge filters and colour glasses to achieve multiple line laser protection with high photopic transmission. Manufacture is by plasma assisted electron beam deposition process which provides high spectral stability independent of temperature or humidity variations. The coatings are extremely rugged, passing all relevant military specifications. Applications include generalpurpose laser protection filters, laser protection eyewear, optical instruments and filters for use in laser surgery. Features of rugate coatings are: Plasma assisted deposition for thermal and environmental stability High visible transmission with minimal colouration coupled with efficient heat rejection Temperature stable with extended operational lifetime Meets most military durability specifications
Measured transmission of single line rugate filter 100
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Transmission (%)
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Laser
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Orion Photonics Ltd Unit 1B, Lake Industrial Estate, Shebbear, Beaworthy, Devon UK, EX215SP Registered in England 07585825 VAT registration number 109 8083 07 Telephone: ++44 (0)333 600 7510 Fax: ++44 (0)333 600 7520 www.orionphotonics.com
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Multiple line laser protection: measured performance in OD
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Optical Density (OD)
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Laser
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Typical performance for laser protection filter Photopic transmission: >53% Optical density at 532nm: >OD5 Optical density 694, 1064nm >OD6 Colour co-ordinates (CIE 1931): x=0.34, y=0.38 for D65 illuminant Operating temperature range: Adhesion, abrasion resistance Humidity, salt fog, temp. shock
-40 to 200oC MIL-C-48497 MIL-STD-810B
Orion Photonics Ltd Unit 1B, Lake Industrial Estate, Shebbear, Beaworthy, Devon UK, EX215SP Registered in England 07585825 VAT registration number 109 8083 07 Telephone: ++44 (0)333 600 7510 Fax: ++44 (0)333 600 7520 www.orionphotonics.com
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