Diameter (mm):

20.00 +0.0/-0.025

Effective Focal Length EFL (mm):

-20.00

N-SF11

f/#:

1.00

Numerical Aperture NA:

0.50

Coating:

MgF₂ (400-700nm)

Type:

Double-Concave Lens

Wavelength Range (nm):

400 - 700

Back Focal Length BFL (mm):

-20.55

Bevel:

Protective bevel as needed

Center Thickness CT (mm):

2.00

Center Thickness Tolerance (mm):

±0.10

Centering (arcmin):

<1

Clear Aperture CA (mm):

19.0

Coating Specification:

R_avg ≤1.75% @ 400 - 700nm

Edge Thickness ET (mm):

5.03

Focal Length Specification Wavelength (nm):

587.6

Focal Length Tolerance (%):

±1

Radius R₁=-R₂ (mm):

-31.82

Surface Quality:

40-20

10 J/cm² @ 532nm, 10ns

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

20mm Dia. x -20mm FL, MgF₂ Coated, Double-Concave Lens

Regulatory Compliance

產品系列說明

20mm Dia. x -20mm FL, MgF2 Coated, Double-Concave Lens

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Regulatory Compliance

產品系列說明

20mm Dia. x -20mm FL, MgF₂ Coated, Double-Concave Lens