17-417 15mm Dia. N-SF6 Precision NIR Aspheric Lens; EFL=30mm; NA=0.25 Uncoated

The 17-417 is a high-precision NIR (Near-Infrared) Aspheric Lens, manufactured by the renowned optical vendor, Edmund Optics. This lens is designed for use with a wavelength of 1550nm, making it suitable for a wide range of near-infrared applications.

The lens features a base shape of a circle, with a diameter of 15mm and a thickness of 3.76mm at the edge. The effective focal length (EFL) of this lens is 30mm, and it has a numerical aperture (NA) of 0.25. The lens is made from N-SF6 Schott, a high-quality optical glass known for its excellent transmission properties in the near-infrared region.

The lens's geometry is defined by its inner and outer radii, both of which are 0. The thickness at the center of the lens is 5mm. The lens's aspheric surface is defined by its conic constant (k1) of -9.73 and its aspheric surface coefficient (k2) of 0. The lens's front surface has a very small deviation from the spherical shape, with its sagitta (s) being calculated using the provided aspheric surface coefficients.

The lens is uncoated, which means it does not have any anti-reflective coatings. While this may result in higher reflective losses, it also means that the lens is less susceptible to damage from environmental factors, making it suitable for use in harsh environments.

The lens is currently in stock and available for purchase. For more information, please refer to the vendor's website using the provided weblink.