45-828 9 mm Dia. N-BAF10/N-SF10 Negative Achromatic Doublet; EFL=-25mm MgF2 400-700nm

The 45-828 is a high-quality negative achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a 9 mm diameter, is designed for use in the visible spectrum, specifically between 400-700nm. The lens features a focal length of -25mm, making it suitable for a wide range of optical applications.

The lens is composed of two elements, N-BAF10 and N-SF10, both from Schott. These materials are known for their excellent optical properties, contributing to the lens' high performance. The lens is coated with Edmund Optics' standard MgF2 coating on both the front and back surfaces, which enhances its transmission capabilities and overall durability.

The geometry of the lens is carefully designed to optimize its performance. The edge thickness is 5.13mm, while the center thickness is 2mm. The lens' inner and outer radii are 0mm, and it features a first radius of -17.75mm and a second radius of 12.17mm. The third radius is 109.75mm.

This lens is a multiplet, meaning it is composed of multiple elements. The multiplet design helps to correct chromatic aberrations, making the lens suitable for a wide range of applications where high image quality is required. The lens' shape is circular, adding to its versatility and ease of use in various optical systems.