Diameter (mm):

9.00 +0.0/-0.025

Effective Focal Length EFL (mm):

20.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

16.46

Focal Length Specification Wavelength (nm):

880.00

Clear Aperture CA (mm):

8.1

Centering (arcmin):

<1

Center Thickness CT (mm):

5.50 ±0.10

Center Thickness CT 1 (mm):

3.50 ±0.05

Center Thickness CT 2 (mm):

2.00 ±0.05

Radius R₁ (mm):

11.01

Radius R₂ (mm):

-11.01

Radius R₃ (mm):

-222.60

Edge Thickness ET (mm):

4.49

N-LAK22 / N-SF6

Surface Quality:

40-20

f/#:

2.22

Numerical Aperture NA:

0.23

Coating:

NIR II (750-1550nm)

Coating Specification:

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

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):

750 - 1550

9mm Dia. x 20mm FL, NIR II Coated, Achromatic Lens

Regulatory Compliance

產品系列說明

9mm Dia. x 20mm FL, NIR II Coated, Achromatic Lens

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Regulatory Compliance

產品系列說明