Design Wavelength | 633 nm | Magnification | Infinite |
Numerical Aperture | 0.26 | Window Thickness | 0.275 mm |
Clear Aperture | 5.50 mm | Laser Window Material / Index | N-BK7/1.5 |
Effective Focal Length | 11 mm | Glass | D-K59 |
Working Distance | 7.97 mm | Surface Quality | 60-40 Scratch-Dig(Entire Bulk Material) |
A220 | |||||||
A220TM |
Vd number | 63.1 |
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CTE (10-6 / °C) | 6.5 |
Thermo optic coefficient (10-6 / °C) (Δn/ΔT) | 4.3 |
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z | SAG as a Function of Y | A4 | 4th Order Aspheric Coefficient |
R | Radius of Curvature | A6 | 6th Order Aspheric Coefficient |
k | Conic Constant | A8 | 8th Order Aspheric Coefficient |
A2 | 2nd Order Aspheric Coefficient | An | nth Order Aspheric Coefficient |