Dielectric Coated Optics

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Dual AR Coated Windows (DAR)

Dual AR Coated Windows (DAR)
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Diameter tolerance +0/-0.1 mm
Thickness tolerance ±0.1 mm
Clear Aperture >90%
Surface quality 20-10 S-D
Transmitted wavefront distortion (TWD) <λ/8 @ 632.8 nm
Protective chamfers <0.25 mm x 45°
Measured reflectivity R<0.3 % @ AOI=0°
Ravg<0.5 % @ AOI=45°
Coating adhesion and durability Per MIL-C-675A
Laser damage threshold reports www.altechna.com/lidt
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Usually these coatings are used in multi-frequency laser output systems (e.g. frequency doubling). This coating provides very high transmission at two different wavelength. Typical wavelengths and reflection curves of an AR coating suitable for the prevalent laser system output at 1064nm and 532nm are shown below.

Coatings are provided by Ion Beam Sputtering (IBS) or Electron beam evaporation with/without Ion assistance coating techniques.
varna These coatings are designed to increase transmission over a broad spectrum

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You can customise this product to your needs. If you do not find suitable specifications for your application please contact us for custom solution.

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