G311339000 31.5 mm Dia. N-BK7 Double-Convex Lens; EFL=40mm Uncoated

The G311339000 is a 31.5 mm diameter, double-convex lens made from N-BK7 glass, a popular choice for its excellent optical properties and high transparency in the visible spectrum. This lens, sourced from Qioptiq Photonics, is uncoated, offering a cost-effective solution for applications where anti-reflection coatings are not required.

The lens features a large 31.5 mm diameter, providing a wide field of view and increased light-gathering capabilities. The double-convex design, characterized by two convex surfaces, offers a high refractive power, making it suitable for imaging and beam shaping applications. The lens has an effective focal length (EFL) of 40 mm, a standard value that balances magnification and field of view in many optical systems.

The lens geometry includes a thickness of 2.1 mm at the edge and 8.3 mm at the center, providing robustness and structural integrity. The radii of curvature for the first and second surfaces are 41.867 mm and -41.867 mm, respectively, indicating a symmetrical design that minimizes optical aberrations. The lens does not have any inner or outer radius, suggesting a uniform thickness throughout the lens.

This lens is made from N-BK7 glass, a borosilicate crown glass known for its low dispersion and high homogeneity. It has a refractive index of approximately 1.5168 at the specified wavelength of 587.6 nm, making it suitable for a wide range of applications in the visible spectrum.