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:

VIS-NIR (400-1000nm)

Type:

Double-Concave Lens

Wavelength Range (nm):

400 - 1000

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):

19.00

Coating Specification:

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

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

5 J/cm² @ 532nm, 10ns

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Regulatory Compliance

RoHS 2015:

Compliant

Reach 219:

Compliant

Certificate of Conformance:

View

產品系列說明

採用抗反射鍍膜，對於400 - 700nm的光可為表面提供小於1.75%的反射率
880nm光的反射率小於0.25%
針對0°入射角而設計
多種鍍膜選擇：無鍍膜、MgF₂、VIS 0°、NIR I及NIR II

雙凹 (DCV) 透鏡具有兩個向內彎曲的曲面以及負焦距。它們用於影像縮小及散射光線

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

Can't find what you need?

Regulatory Compliance

產品系列說明