Diameter (mm):

20.00 ±0.025

Effective Focal Length EFL (mm):

80.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

77.26

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

19.00

Centering (arcmin):

<1

Center Thickness CT (mm):

6.00 ±0.20

Center Thickness CT 1 (mm):

4.00 ±0.10

Center Thickness CT 2 (mm):

2.00 ±0.10

Radius R₁ (mm):

50.49

Radius R₂ (mm):

-37.06

Radius R₃ (mm):

-102.19

Edge Thickness ET (mm):

4.51

N-BK7 / N-SF5

Surface Quality:

40-20

f/#:

4.00

Numerical Aperture NA:

0.13

Coating:

VIS 0° (425-675nm)

Coating Specification:

R_avg ≤0.4% @ 425 - 675nm

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):

425 - 675

20mm Dia. x 80mm FL, VIS 0°, Inked, Achromatic Lens

Regulatory Compliance

產品系列說明

20mm Dia. x 80mm FL, VIS 0°, Inked, Achromatic Lens

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Regulatory Compliance

產品系列說明