45-410 12.5 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=90mm MgF2 400-700nm

This is a 12.5 mm diameter achromatic doublet lens, catalog number 45-410, sourced from Edmund Optics. The lens is specifically designed for use in the 400-700nm spectral range, making it suitable for a wide range of optical applications. The lens is coated with MgF2, which is known for its standard curve and high transmission in the visible spectrum.

The lens is a multiplet, meaning it is composed of multiple optical elements. The first and second elements of the lens are made of N-BK7 and N-SF5 Schott glass respectively. These materials are chosen for their excellent optical properties, including low dispersion and high transmission. The first element has a radius of curvature (R1) of 55.8, while the second element has an R1 of -40.17 and an R2 of -116.32. The lens has an effective focal length (EFL) of 90mm, making it a medium to long focal length lens.

The lens has a thickness of 3.06mm at the edge, reducing to 1.98mm at the center. This tapered design helps to minimize optical aberrations and improve image quality. The lens also features a 1.6mm thick central section (thickness center a), which can be useful in certain optical configurations.

The lens is available for purchase directly from the Edmund Optics website, where it is listed as being in stock at the time of writing. For more detailed specifications and purchasing information, please refer to the provided weblink.