E-49-287 50mm Dia. x 250mm FL, VIS 0° Coated, Achromatic Lens
E-49287 50mm Dia. x 250mm FL, VIS 0° Coated, Achromatic Lens
Diameter (mm): 50.00 +0.0/-0.025
Effective Focal Length EFL (mm): 250.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 243.41
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 49.00
Centering (arcmin): <1
Center Thickness CT 1 (mm): 9.75
Center Thickness CT 2 (mm): 3.50
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 162.59
Radius R2 (mm): -123.82
Radius R3 (mm): -402.58
Edge Thickness ET (mm): 10.54
Surface Quality: 40-20
f/#: 5.00
Numerical Aperture NA: 0.10
Coating: VIS 0° (425-675nm)
Coating Specification: Ravg ≤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