E-20-080 25mm Dia., 0.67 Numerical Aperture, Uncoated, Low Scatter Asphere
E-20080 25mm Dia., 0.67 Numerical Aperture, Uncoated, Low Scatter Asphere
Diameter (mm): 25.00 +0.0/-0.025
Effective Focal Length EFL (mm): 50.00 @ 587.6nm
Numerical Aperture NA: 0.25
Back Focal Length BFL (mm): 46.04 @ 587.6nm
Coating: Uncoated
Centering (arcmin): <3
Surface Quality: 10-5
Clear Aperture CA (mm): 22.50
Edge Thickness ET (mm): 2.90
Center Thickness CT (mm): 6.00 ±0.10
f/#: 2.00
Bevel: 0.75 x 45°
Shape of Back Surface: Plano
Wavelength Range (nm): 390 - 2500
Conjugate Distance: Infinite
Surface Roughness (Angstroms): (<3 defects, ~10Å roughness)
Asphere Figure Error, RMS @ 632.8nm: λ/4
Product Family Description
- P4 Surface Roughness for Low Scatter
- 10-5 Laser Grade Surface Quality
- Precision RMS Aspheric Figure Error
TECHSPEC® Low Scatter Aspheric Lenses are high quality CNC polished aspheres featuring ISO 10110-8 P4 surface roughness and 10-5 surface quality. P4 surface roughness is specified as less than 3 microdefects per 10mm of sampling length and is the smoothest surface outlined in ISO 10110-8 standard. A low surface roughness and 10-5 surface quality leads to very low scattering when focusing or collimating laser light. High laser damage threshold coatings are available upon request. TECHSPEC® Low Scatter Aspheric Lenses are ideal for high power laser applications where low scattering is paramount, such as in the metrology and aerospace industries.