• Ø25.4 mm Plano-Convex Spherical Singlet Lenses
• Material: N-BK7 (Abbe Number: 64.17)
• AR-Coated for the 650 – 1050 nm Range
• Focal Length: 250 mm
• Surface Quality: 20-10 Scratch-Dig

The LA1461-B Plano-Convex Lens is fabricated from RoHS-compliant BK7 glass (N-BK7) and features an antireflection coating for the 650 to 1050 nm range. N-BK7 is probably the most common optical glass used for high quality optical components.

Plano-convex lenses focus a collimated beam to the back focus and collimate light from a point source. This lens has a positive focal length and near-best-form shape for infinite and finite conjugate applications. The lens is fabricated from N-BK7, which has an Abbe Number of 64.17; this value is an indicator of the dispersion.

• Lens Shape: Plano / Convex
• Design Wavelength: 633 nm
• Wavelength Range: 650 to 1050 nm (-B Coating)
• Index of Refraction at 633 nm: 1.515
• Surface Quality: 40-20 Scratch-Dig
• Damage Threshold: 7.5 J/cm² (at 810 nm, 10 ns, 10 Hz, Ø0.144 mm)
• Surface Flatness: λ/2
• Spherical Surface Power (Convex side): 3λ/2
• Surface Irregularity: λ/4
• Abbe Number: v_d=64.17
• Centration: ≤3 arcmin
• Clear Aperture: >90% of Diameter
• Focal Length Tolerance: ±1%
• f: 250 mm
• R: 128.8 mm
• t_c: 2.6 mm
• t_e: 2 mm
• f_b: 248.3 mm
• Suggested Fixed Lens Mount: LMR1