13-008 25 mm Dia. N-SK11/N-SF5 Mounted Achromatic Doublet; EFL=85mm MgF2 400-700nm

The 13-008 is a high-quality mounted achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens is designed with a base shape of a circle, featuring a diameter of 25 mm and an effective focal length (EFL) of 85 mm. The lens is constructed from two types of Schott glass, N-SK11 and N-SF5, which are renowned for their excellent optical properties.

The lens geometry is intricately designed with three radii (r1, r2, and r3) and two thicknesses (edge and center). The edge thickness measures 6.05 mm, while the center thickness is 5.01 mm, with an additional 3 mm thickness at the center a. The inner and outer radii are 0 mm, indicating a symmetrical design.

The lens is coated with Edmund Optics' standard MgF2 coating on both the front and back surfaces, ensuring optimal light transmission within the 400-700 nm spectral range. This coating is part of the standard curve, providing a balance between cost and performance.

The 13-008 is a multiplet lens, meaning it is composed of multiple elements. This design helps to correct chromatic aberrations, a common issue in optical systems, making it an ideal choice for various applications. The lens is currently in stock, and its detailed specifications are available on the Edmund Optics website.