50.8mm Dia. x 50.8mm FL, 8-12µm AR Coated, ZnSe Aspheric Lens

Diameter (mm):

50.80 +0.00/-0.10

Effective Focal Length EFL (mm):

50.80

Numerical Aperture NA:

0.50

Back Focal Length BFL (mm):

48.10

Center Thickness CT (mm):

6.50 ±0.10

Coating:

BBAR (8000-12000nm)

Coating Specification:

R_avg <0.5% @ 8 - 12μm

II-VI Infrared ZnSe

Clear Aperture CA (mm):

45.72

Surface Quality:

40-20

Edge Thickness ET (mm):

2.08

Centering (arcmin):

≤3

Centering, ETD (μm):

≤12.7

Bevel:

Protective bevel as needed

f/#:

Shape of Back Surface:

Plano

Wavelength Range (nm):

8000 - 12000

Conjugate Distance:

Infinite

Surface Roughness (Angstroms):

<50 RMS

Power (P-V) @ 10.6μm:

λ/10

Asphere Figure Error (λ, RMS @ 632.8nm):

0.5

Regulatory Compliance

RoHS 2015:

Compliant

Reach 209:

Compliant

Product Family Description

Edmund Optics Designed, II-VI Manufactured
Premier Grade ZnSe Material
Uncoated or Broadband 8-12µm AR Coating Available

TECHSPEC® Zinc Selenide (ZnSe) Aspheric Lenses are designed to provide diffraction-limited focusing performance for 10.6µm CO₂ lasers. Manufactured from II-VI Infrared ZnSe material featuring <0.0005 cm^-1 bulk absorption at 10.6µm, these lenses are available uncoated or with a broadband anti-reflection coating providing superior transmission from 8 - 12µm. The precision designs are ideal for integration into laser systems, thermal imaging assemblies, and FTIR devices. TECHSPEC Zinc Selenide Aspheric Lenses feature an irregularity of <λ/20 at 10.6µm, 40-20 surface quality, and <50Å surface roughness.