AC508-250-B-ML 50.8 mm Dia. N-BAF10/N-SF6HT Mounted Achromatic Doublet; EFL=250mm 650-1050nm

The AC508-250-B-ML is a mounted achromatic doublet lens, designed and manufactured by Thorlabs. This lens is specifically engineered for use within the spectral range of 650-1050nm, making it ideal for a variety of applications within this range.

The lens features a 50.8mm diameter, providing a substantial surface area for light transmission. The lens is constructed from two types of Schott glass, N-BAF10 and N-SF6HT, each chosen for their specific optical properties. These materials contribute to the lens's overall performance, particularly in terms of chromatic aberration correction and transmission efficiency.

The lens's geometry is characterized by its three radii of curvature (r1, r2, and r3), its edge thickness of 6.8mm, and its center thicknesses (6.6mm and 2.6mm). These parameters are crucial in determining the lens's optical performance, including its focusability, distortion, and overall imaging quality.

The lens is coated with Thorlabs' proprietary AC650-1050-B coating on both the front and back surfaces. This coating is specifically designed to enhance the lens's performance within the 650-1050nm spectral range, improving transmission efficiency and reducing surface reflections.

The lens is mounted, providing a convenient and ready-to-use solution for users. The mount ensures the lens's stability and alignment, reducing the need for additional mounting hardware and simplifying the integration process into existing optical systems.

According to Thorlabs' website, the lens is currently in stock, indicating its availability for immediate purchase and use. The product's webpage also provides additional information and resources, including technical drawings and specifications, to aid users in their selection process.