• Ø30 mm Plano-Convex Spherical Singlet Lenses
• Material: N-BK7 (Abbe Number: 64.17)
• AR-Coated for the 1050-1620 nm Range (-C Coating)
• Focal Length: 200 mm
• Surface Quality: 40-20 Scratch-Dig

The LA1541-C Plano-Convex Lens is fabricated from RoHS-compliant BK7 glass (N-BK7) and features an antireflection coating for the 1050 to 1620 nm range. N-BK7 is probably the most common optical glass used for high quality optical components. It is typically chosen whenever the additional benefits of UV fused silica (i.e., good transmission further into the UV and a lower coefficient of thermal expansion) are not necessary.

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
• Material: N-BK7 (Grade A)
• Wavelength Range: 1050 to 1620 nm (-C Coating)
• Design Wavelength: 633 nm
• Index of Refraction at 633 nm: 1.515
• Surface Quality: 40-20 Scratch-Dig
• Damage Threshold: 7.5 J/cm² (at 1524 nm, 10 ns, 10 Hz, Ø0.123 mm)
• Surface Flatness (Plano Side): 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%
• Diameter: 30 mm
• f: 200 mm
• R: 103 mm
• t_c: 2.8 mm
• t_e: 1.7 mm
• f_b: 196.8 mm
• Suggested Fixed Lens Mount: LMR30