Diameter (mm):

18.00 +0.0/-0.025

Effective Focal Length EFL (mm):

50.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

45.24

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

17.00

Centering (arcmin):

<1

Center Thickness CT (mm):

7.30 ±0.20

Center Thickness CT 1 (mm):

5.00 ±0.10

Center Thickness CT 2 (mm):

2.30 ±0.10

Radius R₁ (mm):

27.12

Radius R₂ (mm):

-25.66

Radius R₃ (mm):

-538.70

Edge Thickness ET (mm):

5.69

N-SSK8 / N-SF10

Surface Quality:

40-20

f/#:

2.78

Numerical Aperture NA:

0.18

Coating:

MgF₂ (400-700nm)

Coating Specification:

R_avg ≤1.75% @ 400 - 700nm

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 - 700

18mm Dia. x 50mm FL, MgF₂ Coated, Achromatic Doublet Lens

Regulatory Compliance

產品系列說明

18mm Dia. x 50mm FL, MgF2 Coated, Achromatic Doublet Lens

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Regulatory Compliance

產品系列說明

18mm Dia. x 50mm FL, MgF₂ Coated, Achromatic Doublet Lens