E-31-402 63.5mm Dia x 354.9mm FL Achromatic Lens
E-31402 63.5mm Dia x 354.9mm FL Achromatic Lens
Diameter (mm): 63.50 +0.00/-0.10
Effective Focal Length EFL (mm): 354.87
Focal Length Tolerance (%): ±1
Back Focal Length BFL (mm): 344.52
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 62.70
Centering (arcmin): 5.00
Center Thickness CT 1 (mm): 11.94
Center Thickness CT 2 (mm): 8.86
Center Thickness Tolerance (mm): ±0.20
Radius R1 (mm): 203.94
Radius R2 (mm): -156.41
Radius R3 (mm): -156.41
Radius R4 (mm): -569.60
Surface Quality: 60-40
f/#: 5.6
Numerical Aperture NA: 0.09
Coating: MgF2 (400-700nm)
Coating Specification: Ravg ≤1.75% @ 400 - 700nm
Construction: Unmounted, Cemented
Bevel: Protective bevel as needed
Type: Achromatic Lens
Wavelength Range (nm): 400 - 700
Product Family Description
- Offered in Cemented or Air-Spaced Designs
- Mounted Versions Available for Easy Integration
- Feature MgF2 Anti-Reflection Coating
TECHSPEC® Large Precision Achromatic Lenses offer near-diffraction limited performance across the designated wavelength range. These color-corrected achromatic lenses feature long focal lengths and are available in either cemented or air-spaced designs. Mounted versions feature a male mounting thread for easy integration into optical systems. Adhesive foil spacers and mounting instructions are included for unmounted, air-spaced achromatic lenses.