15-000 75 mm Dia. N-BK7 Precision Aspheric Lens; EFL=112.5mm; NA=0.33 Uncoated

The 15-000 is a high-precision Aspheric Lens offered by Edmund Optics, a leading vendor in the optical industry. This lens, with a catalog number 15-000, is designed for use in applications that require a high level of optical precision and accuracy.

The lens is made from N-BK7, a high-quality optical glass from Schott, ensuring excellent optical performance. It features a base shape of a circle, with a diameter of 75 mm, making it suitable for a wide range of optical systems. The lens has a numerical aperture (NA) of 0.33, which is a measure of the light-gathering ability of the lens, and an effective focal length (EFL) of 112.5 mm.

The lens is uncoated, which means it does not have any anti-reflective coatings. While this may result in a higher level of light scattering and reflection, it also means that the lens is more cost-effective and easier to clean.

The geometry of the lens is carefully controlled, with an inner radius of 0 mm, an outer radius of 0 mm, and a thickness at the edge of 4.13 mm. The thickness at the center of the lens is 16.8 mm, and it has a conic constant (k1) of -0.952. The front surface of the lens has a radius of curvature (r1) of 58.14 mm, and the back surface is flat (r2 = 0).

The lens is designed to work at a wavelength of 587.6 nm, and it has a high degree of optical accuracy, with very low spherical aberration. This makes it ideal for use in applications such as imaging, beam shaping, and laser systems.