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Substrate
Material
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UV
grade fused silica
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Surface Quality
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10-5 laser quality
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Transmitted Wavefront
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λ/10 at 633nm
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Diameter Tolerance
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+ 0.00mm, - 0.25mm
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Thickness Tolerance
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≤0.50mm T ± 25% , > 0.50mm T ± 0.25mm
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Wedge
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≤1 second
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Chamfer
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0.35mm at 45° typical
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Coating Technology
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Electron beam multilayer dielectric
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Adhesion and Durability
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Per MIL-C-675C. Insoluble in lab solvents.
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Clear Aperture
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Exceeds central 85% of dimension
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| Specify
any center wavelength from 210-2000 nm and the reflectivity
required to achieve the desired finesse. The spectral
bandwidth and variation in reflectance over that
bandwidth will depend on a number of factors including
center wavelength and exact coating design. Custom
etalons on in-stock substrates are available with
a two week delivery time. |
| Free Spectral Range for varius spacer thickness |
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Part
No.
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Diameter
(mm)
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Thickness
(mm)
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Free
Spectral Range at 600 nm (cm-1)
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ST025
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25.4
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0.25
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13.4
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ST030
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25.4
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0.30
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11.2
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ST050
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25.4
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0.50
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6.7
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ST070
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25.4
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0.70
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4.8
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ST100
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25.4
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1.00
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3.4
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ST150
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25.4
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1.50
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2.2
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ST200
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25.4
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2.00
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1.7
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ST300
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25.4
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3.00
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1.1
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| Note:
Other sizes and coatings are available upon request. |
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