E-54569 140mm Dia x 1900.2mm FL Achromatic Lens, Mtd
Diameter (mm): 140.00 +0.00/-0.12
Effective Focal Length EFL (mm): 1900.24
Focal Length Tolerance (%): ±1
Back Focal Length BFL (mm): 1887.58
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 123.00
Centering (arcmin): 5.00
Center Thickness CT 1 (mm): 15.42
Center Thickness CT 2 (mm): 10.92
Center Thickness Tolerance (mm): ±0.86
Radius R1 (mm): 1131.72
Radius R2 (mm): -780.87
Radius R3 (mm): -779.37
Radius R4 (mm): -2704.01
Surface Quality: 60-40
f/#: 14.8
Numerical Aperture NA: 0.03
Coating: MgF2 (400-700nm)
Coating Specification: Ravg ≤1.75% @ 400 - 700nm
Mount Thickness (mm): 33.07
Mounting Threads: M138 x 1.0
Construction: Mounted, Airspaced 0.10mm
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.