E-15-476 12.7mm Dia x 31.8mm FL, YAG-BBAR Coated, Achromatic Doublet Lens
E-15476 12.7mm Dia x 31.8mm FL, YAG-BBAR Coated, Achromatic Doublet Lens
Diameter (mm): 12.70 +0.0/-0.025
Effective Focal Length EFL (mm): 31.75
Focal Length Tolerance (%): ±1
Back Focal Length BFL (mm): 28.83
Focal Length Specification Wavelength (nm): 587.6
Clear Aperture CA (mm): 11.70
Centering (arcmin): <1
Center Thickness CT 1 (mm): 4.00
Center Thickness CT 2 (mm): 1.75
Center Thickness Tolerance (mm): ±0.2
Radius R1 (mm): 21.13
Radius R2 (mm): -16.69
Radius R3 (mm): -61.73
Edge Thickness ET (mm): 4.45
Surface Quality: 40-20
f/#: 2.5
Numerical Aperture NA: 0.20
Coating: YAG-BBAR (500-1100nm)
Coating Specification:
Rabs <0.25% @ 532nm
Rabs <0.25% @ 1064nm
Ravg <1.0% @ 500 - 1100nm
Rabs <0.25% @ 1064nm
Ravg <1.0% @ 500 - 1100nm
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): 500 - 1100
Product Family Description
- Optimized for <0.25% Absolute Reflectivity at 532nm and 1064nm
- Excellent Broadband Transmission from 500 - 1100nm
- Low Cost Alternative to Air-Spaced Focusing Doublets
TECHSPEC® YAG-BBAR Coated Achromatic Lenses consist of two optical components cemented together to form a doublet that is ideal for correcting on-axis spherical and chromatic aberrations. These achromats feature a broadband anti-reflective coating with superior transmission from 500 - 1100nm, and are optimized for less than 0.25% absolute reflectivity at 532 and 1064nm. Our TECHSPEC YAG-BBAR Coated Achromatic Lenses are specifically designed to minimize the spot size for polychromatic illumination within the recommended usable wavelength range, but may also be used for focusing Nd:YAG lasers, especially those with an alignment beam.