ACT508-1000-A 50.8 mm Dia. N-BK7/N-SF2 Unmounted Achromatic Doublet; EFL=1000mm 400-700nm

The ACT508-1000-A is a high-quality achromatic doublet lens, designed and manufactured by Thorlabs. This lens is unmounted, offering flexibility in integration with various optical systems. The lens features a 50.8 mm (2") diameter, making it suitable for use in a wide range of applications.

The lens is composed of two elements, made from N-BK7 and N-SF2 Schott glass, respectively. These materials are chosen for their excellent optical properties, contributing to the lens's high performance. The lens's geometry is carefully designed, with radii of curvature of r1=757.9, r2=-364.7, and r3=-954.2, and a center thickness of 6 mm for both elements. This design helps to minimize optical aberrations, ensuring sharp and clear images.

The lens features a broadband anti-reflection coating, specifically the THORLABS AC400-700-A coating, on both the front and back surfaces. This coating is designed to operate in the 400-700 nm range, providing high transmission and low reflectance, which is crucial for many optical applications.

The lens has an effective focal length (EFL) of 1000 mm, making it a telecentric lens. This feature is particularly useful in imaging applications where a large working distance and a narrow field of view are required.

According to the vendor's website, the lens is currently in stock, indicating its availability for immediate purchase and delivery. The product's weblink is valid, providing easy access to additional information and the option to place an order.