40mm Dia. x 50mm FL, VIS-NIR Coated, Achromatic Lens

Diameter (mm):

40.00 +0.0/-0.025

Effective Focal Length EFL (mm):

50.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

34.46

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

39.00

Centering (arcmin):

Center Thickness CT 1 (mm):

19.00

Center Thickness CT 2 (mm):

7.00

Center Thickness Tolerance (mm):

±0.2

Radius R₁ (mm):

28.56

Radius R₂ (mm):

-29.965

Radius R₃ (mm):

-153.666

Edge Thickness ET (mm):

16.52

N-SK11 / N-SF5

Surface Quality:

40-20

f/#:

1.25

Numerical Aperture NA:

0.40

Coating:

VIS-NIR (400-1000nm)

Coating Specification:

R_abs ≤0.25% @ 880nm
R_avg ≤1.25% @ 400 - 870nm
R_avg ≤1.25% @ 890 - 1000nm

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Bevel:

Protective bevel as needed

Type:

Achromatic Lens

Wavelength Range (nm):

400 - 1000

Regulatory Compliance

RoHS 2015:

Compliant

Reach 219:

Compliant

Certificate of Conformance:

View

Product Family Description

Designed for 0° Angle of Incidence
Less Than 0.25% Reflectance Per Surface @ 880nm
MgF₂ and VIS 0° Coated Achromats Also Available

Achromatic lenses consist of two optical components cemented together to form an achromatic doublet which is computer optimized to correct for on-axis spherical and chromatic aberrations. Magnesium Fluoride coated and VIS 0° coated achromats also available.

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