Diameter (mm):

25.00 +0.0/-0.025

Effective Focal Length EFL (mm):

225.00

Focal Length Tolerance (%):

±1

Back Focal Length BFL (mm):

222.69

Focal Length Specification Wavelength (nm):

587.6

Clear Aperture CA (mm):

24.00

Centering (arcmin):

<1

Center Thickness CT (mm):

5.50 ±0.20

Center Thickness CT 1 (mm):

3.00 ±0.10

Center Thickness CT 2 (mm):

2.50 ±0.10

Radius R₁ (mm):

139.53

Radius R₂ (mm):

-100.21

Radius R₃ (mm):

-291.32

Edge Thickness ET (mm):

4.67

N-BK7 / N-SF5

Surface Quality:

40-20

f/#:

9.00

Numerical Aperture NA:

0.06

Coating:

MgF₂ (400-700nm)

Coating Specification:

R_avg ≤1.75% @ 400 - 700nm

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):

400 - 700

25mm Dia. x 225mm FL, MgF₂ Coated, Achromatic Doublet Lens

Regulatory Compliance

產品系列說明

25mm Dia. x 225mm FL, MgF2 Coated, Achromatic Doublet Lens

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Regulatory Compliance

產品系列說明

25mm Dia. x 225mm FL, MgF₂ Coated, Achromatic Doublet Lens