Diameter (mm):

9.00 ±0.025

Effective Focal Length EFL (mm):

-18.00

N-BK7

f/#:

2.00

Numerical Aperture NA:

0.25

Coating:

NIR II (750-1550nm)

Type:

Double-Concave Lens

Wavelength Range (nm):

750 - 1550

Back Focal Length BFL (mm):

-18.49

Center Thickness CT (mm):

1.50

Center Thickness Tolerance (mm):

±0.05

Centering (arcmin):

<1

Clear Aperture CA (mm):

8.10

Coating Specification:

R_abs ≤1.5% @ 750 - 800nm
R_abs ≤1.0% @ 800 - 1550nm
R_avg ≤0.7% @ 750 - 1550nm

Edge Thickness ET (mm):

2.45

Focal Length Specification Wavelength (nm):

587.6

Focal Length Tolerance (%):

±1.00

Radius R₁=-R₂ (mm):

-18.86

Surface Quality:

40-20

8 J/cm² @ 1064nm, 10ns

Power (P-V) @ 632.8nm:

1.5λ

Irregularity (P-V) @ 632.8nm:

λ/4

Regulatory Compliance

RoHS:

Compliant

Certificate of Conformance:

View

產品系列說明

採用抗反射鍍膜，對於750 - 1550nm的光可為表面提供小於0.7%的反射率
針對0°入射角而設計
多種鍍膜選擇：無鍍膜、MgF₂、VIS 0°、VIS-NIR及NIR I

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

9mm Dia. x -18mm FL, NIR II, Inked, Double-Concave Lens

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Regulatory Compliance

產品系列說明