49-930 15 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=60mm MgF2 400-700nm

The 49-930 is a high-quality achromatic doublet lens, 15 mm in diameter, designed and manufactured by Edmund Optics. This lens is a multiplet, meaning it is composed of multiple optical elements to achieve superior performance. The lens is specifically designed for use in the 400-700nm spectral range, making it suitable for a wide range of applications in the visible light spectrum.

The lens features a focal length of 60mm, indicated by the EFL (Effective Focal Length) parameter. This, combined with its 15mm diameter, makes it a compact and versatile option for various optical systems. The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring high-quality optical performance.

The lens surfaces are coated with EDM MgF2 std curve, a standard anti-reflection coating that reduces surface reflections and increases transmission. This coating is applied to both the front and back surfaces of the lens.

The geometry of the lens includes a thickness of 4.37mm at the edge, a center thickness of 3.5mm, and a central thickness 'a' of 2mm. The lens's inner and outer radii are 0, indicating a symmetrical design. The lens's first and second radii of curvature are 37.23mm and -26.69mm, respectively, while the third radius of curvature is -76.36mm.