E-63-690 4mm Dia. x 6mm FL, MgF2 Coated, Achromatic Doublet Lens
E-63690 4mm Dia. x 6mm FL, MgF2 Coated, Achromatic Doublet Lens
Product Family Description
- Designed for 0° Angle of Incidence
- Less Than 1.75% Reflectance Per Surface @ 400 - 700nm
Diameter (mm): 4.00 +0.0/-0.025
Effective Focal Length EFL (mm): 6.00
Focal Length Tolerance (%): ±2
Back Focal Length BFL (mm): 3.92
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 3.6
Centering (arcmin): <3
Center Thickness CT 1 (mm): 2.80
Center Thickness CT 2 (mm): 1.00
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 4.24
Radius R2 (mm): -2.60
Radius R3 (mm): -18.90
Edge Thickness ET (mm): 3.19
Surface Quality: 20-10
f/#: 1.5
Numerical Aperture NA: 0.33
Coating: MgF2 (400-700nm)
Coating Specification: Ravg ≤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