67-243 15 mm Dia. N-SF5 Precision Aspheric Lens; EFL=9mm; NA=0.83 Uncoated

The 67-243 is a high-precision aspheric lens, boasting a 15 mm diameter and a numerical aperture (NA) of 0.83. This lens is sourced from the renowned optical vendor, Edmund Optics, and is uncoated. The lens is designed for use with a wavelength of 587.6 nm, making it suitable for a wide range of optical applications.

The lens's geometry is intricately designed, with an inner radius of 0 mm and an outer radius of 0 mm. The thickness at the edge is 1.35 mm, while the effective focal length (EFL) is 9 mm. The lens's first radius of curvature (R1) is 6.054 mm, and it has no second radius of curvature (R2). The back focal length (BFL) is 4.81 mm, and the thickness at the center is 7 mm.

The lens's conic constant (K1) is -1.261245, indicating a high degree of asphericity. The NA, or the ability of the lens to gather light, is 0.83, indicating a wide acceptance angle and high light-gathering capability. The lens's front surface has a decentering of 0.000422733 mm, a slope of 5.23e-07 mm, a curvature of 1.01e-08 mm, and a conic constant of -2.41e-10 mm.

This lens is a part of the n-SF5 family of glasses from Schott, known for their excellent optical properties and high damage threshold. The lens is uncoated, offering users the flexibility to apply their preferred coating based on their specific application requirements.