E-88-598 75mm Dia. x 400mm FL, VIS-NIR Coated, Achromatic Lens
E-88598 75mm Dia. x 400mm FL, VIS-NIR Coated, Achromatic Lens
Diameter (mm): 75.00 +0.0/-0.025
Effective Focal Length EFL (mm): 400.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 392.1
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 73.5
Centering (arcmin): <1
Center Thickness CT 1 (mm): 11.05
Center Thickness CT 2 (mm): 6.00
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 246.50
Radius R2 (mm): -180.92
Radius R3 (mm): -526.7
Edge Thickness ET (mm): 12.84
Surface Quality: 40-20
f/#: 5.3
Numerical Aperture NA: 0.09
Coating: VIS-NIR (400-1000nm)
Coating Specification:
Rabs ≤0.25% @ 880nm
Ravg ≤1.25% @ 400 - 870nm
Ravg ≤1.25% @ 890 - 1000nm
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