Dual Laser Line mirrors (DHR)
 | Features
 | The coatings are designed to achieve the highest possible reflectivity at two specific laser line wavelengths at normal or 45 degrees incidence |
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Description
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Dual Laser Line mirrors (DHR) provide an optimised performance at two certain wavelengths and certain angle of incidence (AOI).
These multilayer coatings are stacks intended to achieve the highest possible reflectivity at two specific laser line wavelengths at normal or 45 degrees incidence. Laser line high reflectivity coatings are intended for external beam manipulation applications where even slight losses may be intolerable.
Coatings are provided by Ion Beam Sputtering (IBS) or Electron beam evaporation with/without Ion assistance coating techniques.
The measured transmission curve for dual wavelength HR coating (HR @ 515+1030 nm) |
Standard Specifications
| Substrate dimension tolerance
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+0/-0,1 mm
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| Substrate wavefront distortion
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< L/8, < L/4 for curved surfaces
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| Substrate surface quality
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20/10 SD; 40/20 SD for curved faces
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| Coating Adhesion and Durability
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Per MIL-C-675A
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| Clear Aperture
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>90% of diameter
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| Measured Reflectivity
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R>99,5% @ 0o; Rs>99,3% and Rp>98,5% @ 45o
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| Laser Damage Threshold |
>3-5 J/cm2 for 10 ns pulses @ 1064 nm |
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