AC254-050-AB-ML 25.4 mm Dia. N-BAF10/N-SF6 Mounted Achromatic Doublet; EFL=50mm 400-1100nm

This is the AC254-050-AB-ML, a 25.4 mm diameter achromatic doublet lens, manufactured by Thorlabs. The lens is designed for use within the 400-1100nm wavelength range, making it suitable for a wide range of optical applications.

The lens is a multiplet, meaning it is composed of multiple optical elements. The geometry of the lens includes an outer radius of 0mm, an inner radius of 0mm, and a diameter of 25.4mm. The lens has a thickness of 9.5mm at the edge and varies in thickness towards the center, with measurements of 9mm and 3.5mm at the first and second center points respectively. The curvature of the lens is defined by radii of 34.9mm, -28.8mm, and -137.5mm.

The lens is made from two types of Schott glass, N-BAF10 and N-SF6, each with their own unique refractive indices and dispersions. This combination of materials helps to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The lens is coated with Thorlabs' AB Achromatic AR coating on both the front and back surfaces, which further enhances its optical performance by reducing reflection and increasing transmission.

The lens is mounted, making it ready for immediate use in optical systems. The item data indicates that the weblink to the product is valid and the product is in stock, ensuring quick and easy acquisition for your optical needs.