32-319 25 mm Dia. S-BAH11/N-SF10 Achromatic Doublet; EFL=35mm MgF2 400-700nm

The 32-319 is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens is characterized by its 25 mm diameter and a focal length of 35mm, making it suitable for a wide range of optical applications. The lens is constructed from two types of glass, S-BAH11 from Ohara and N-SF10 from Schott, each with specific refractive indices and dispersions that contribute to the lens's overall chromatic correction.

The lens features a front and back coating of EDM MgF2, a standard curve coating that provides excellent anti-reflection properties across the visible spectrum (400-700nm). This coating enhances the lens's transmission capabilities, reducing unwanted reflections and improving overall image quality.

The lens geometry is meticulously designed, with a central thickness of 11mm and edge thickness of 9.47mm. The lens's inner and outer radii are zero, indicating a symmetrical design that contributes to its high optical performance. The lens also features a slight concave shape on the first surface (r1=-24.47) and a convex shape on the second surface (r2=16.49), followed by a strongly concave shape on the third surface (r3=-131.65). The lens's thickness at the center is 11mm, while its thickness at the center a is 2.5mm.