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E-89683 40mm Dia. x 50mm FL, VIS-NIR Coated, Achromatic Lens

Fosco Connect Part No.: E-89683

  • $ 288.00 or



E-89683 40mm Dia. x 50mm FL, VIS-NIR Coated, Achromatic Lens

Diameter (mm): 40.00 +0.0/-0.025
Effective Focal Length EFL (mm): 50.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 34.46
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 39.00
Centering (arcmin): <1
Center Thickness CT 1 (mm): 19.00
Center Thickness CT 2 (mm): 7.00
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 28.56
Radius R2 (mm): -29.965
Radius R3 (mm): -153.666
Edge Thickness ET (mm): 16.52
Surface Quality:  40-20
f/#: 1.25
Numerical Aperture NA: 0.40
Coating: VIS-NIR (400-1000nm)

Coating Specification:
Rabs ≤0.25% @ 880nm
Ravg ≤1.25% @ 400 - 870nm
Ravg ≤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
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