45-138 15 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=50mm MgF2 400-700nm

The 45-138 is a high-quality achromatic doublet lens, 15 mm in diameter, with a focal length of 50mm, sourced from the renowned optical vendor, Edmund Optics. This lens is designed for use in the spectral range of 400-700nm, making it suitable for a wide range of applications in the visible light spectrum.

The lens is composed of two elements, made from N-BK7 and N-SF5 Schott glass, respectively. These materials are known for their excellent optical properties, contributing to the lens' high performance. The lens features a standard MgF2 coating on both the front and back surfaces, which enhances its transmission in the visible spectrum.

The lens' geometry is carefully designed to optimize its performance. It has an inner radius of 0 and an outer radius of 0, with a thickness at the edge of 5.12mm. The first radius of curvature (r1) is 26.81mm, the second radius (r2) is -23.82mm, and the third radius (r3) is -90.79mm. The thickness at the center of the lens is 5mm, with an additional 1.5mm thickness at the center a.

This lens is a multiplet, meaning it is composed of multiple elements. The multiplet design allows for the correction of chromatic aberrations, making the lens suitable for a wide range of applications where high image quality is required.

The lens is currently in stock and available for purchase through the Edmund Optics website, as indicated by the "weblink status" field in the item data. For more detailed information, including technical specifications and purchasing options, please refer to the provided weblink.