E-49-317 9mm Dia. x 40mm FL, VIS-NIR Coated, Achromatic Lens

Fosco Connect Part No.: E-49317

E-49317 9mm Dia. x 40mm FL, VIS-NIR Coated, Achromatic Lens

Diameter (mm): 9.00 +0.0/-0.025

Effective Focal Length EFL (mm): 40.00

Focal Length Tolerance (%): ±2

Back Focal Length BFL (mm): 37.54

Focal Length Specification Wavelength (nm): 587.6

Clear Aperture CA (mm): 8.1

Centering (arcmin): <1

Center Thickness CT 1 (mm): 3.73

Center Thickness CT 2 (mm): 1.33

Center Thickness Tolerance (mm): ±0.2

Radius R₁ (mm): 24.77

Radius R₂ (mm): -18.01

Radius R₃ (mm): -51.17

Edge Thickness ET (mm): 4.45

Surface Quality: 40-20

f/#: 4.44

Numerical Aperture NA: 0.11

Coating: VIS-NIR (400-1000nm)

Coating Specification:

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

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 - 1000