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Plano-Concave Lens ZnSe - Model #: LPCZ-20B0-ET5.0
2.000"Ø (50.8mm) X .200" (5.0mm) E.T.
EFL =(-20.00") @ 10.6µm
Coated: AR/AR @ 10.6µm
Material: ZnSe Laser Grade C.V.D. type
Diameter Tolerances: +.000”/-.005”
Thickness: ±.010"
Surface Figure: < 1/40 wavelength @ 10.6µm
Centration: < .001"
Focal Length Tolerance: ±1.0%
Surface Quality: < 40/20 scratch-dig Laser Finish
Standard AR Coating type Both Sides @ 10.6µm (AR)
Absorption: < 0.25 % total
Reflectance: < 0.20% per surface @ 10.6µm
Transmittance: > 99.0% typical