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Lens Specifications

Design Wavelength	408 nm	Magnification	Infinite
Numerical Aperture	0.6	Window Thickness	0.25 mm
Clear Aperture	4.80 mm	Laser Window Material / Index	N-BK7/1.5
Effective Focal Length	4.02 mm	Glass	ECO-550
Working Distance	2.37 mm	Surface Quality	40-20 Scratch-Dig(Entire Bulk Material)

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352671-A
C671TME-A

Vd number	50.28
CTE (10-6 / °C)	11.62
Thermo optic coefficient (10-6 / °C) (Δn/ΔT)	2.39

Surface R(mm) k A4 A6 A8	Side 1 -19.51 - 0.000772987 - -	Side 2 2.71 -0.997558000 0.002598700 0.000023695 -0.000003650

Side 1 and Side 2 are labeled as ASP1 and ASP2, respectively, on the drawings shown on the Specifications tab.

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	A10	10th Order Aspheric Coefficient