SF11 is dense flint glass with excellent chemical and physical properties. It has a good transmission in visible and near IR similar to BK7. But its higher index and dispersion makes it unique in fabrication of lenses with minimized aberrations and prisms/windows/rods with large dispersions. In ultrafast optics, SF11 rods are commonly used as pulse stretchers due to its large dispersion.
Newlight Photonics offers circular/rectangular SF11 windows or rods with thickness from 0.15 mm to 150 mm.
Various high quality HR, AR, and partial reflective coatings are available on SF11 faces.
|Part No.||Aperture||Thickness||Coating||Price||Availability||Add to Cart|
Basic Properties of SF11 and N-SF11 Glass:
|Transparency Range||410 - 2000 nm||410 - 2000 nm|
|Density||4.8 g/cm3||3.2 g/cm3|
|Thermo-Optic Coefficients (dn/dT)||6.6 x 10-6 /oC||-2.1 x 10-6 /oC|
|Optical Homogeneity||Δn < 10-4 /cm||Δn < 10-4 /cm|
|Mohs Hardness||~ 5.0||~ 6.0|
|Thermal Expansion Coefficient||8.2 x 10-6 /K||9.4 x 10-6 /K|
|Thermal Conductivity||0.74 W/m/K||0.95 W/m/K|
|n2=1+1.73848λ2/( λ2 - 0.013607 ) +0.31117λ2/(λ2-0.061596)+1.17491 λ2/(λ2-121.92271)||n2=1+1.73760λ2/( λ2 - 0.013189)+ 0.31375λ2/(λ2-0.062307)+1.89878 λ2 /(λ2-155.23629)|
|Wavelength (nm)||Refractive Index|
Specifications of SF11 Windows:
|Dimension Tolerance:||Diameter: ± 0.1 mm,
|Clear Aperture:||> 85%|
|Surface Quality:||20/10 Scratch and Dig|
|Parallelism:||< 1 arc min|
|Flatness:||λ/6 @ 632.8 nm for T>=2mm|
|Transmission Wavefront Distortion:||< λ/8 @ 632.8 nm for T=<25mm
|Bevel:||< 0.25 mm X 45°|
N-SF11, the RoHS version of standard SF11 may be used for the windows without notice. N-SF11 will always be used for EU customers in compliance with the RoHS regulations. Please let us know if N-SF11 and SF11 have to be distinguished for your applications.
Various high quality HR, AR, Broadband AR (BBAR) and partial reflective (PR) coatings are also available upon request.
AR Coatings: R<0.2% at the central wavelength
HR Coatings: R>99.6% at the central wavelength
PR Coatings: R=3-95% at the specified wavelength
Broadband AR: R<1% over the specified range
Broadband coating centered @ 800 nm (BBAR@800 nm):
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