AC508-750-C 50.8 mm Dia. N-SF10/N-SF6 Unmounted Achromatic Doublet; EFL=748.9mm 1050-1700nm

The AC508-750-C is a high-quality achromatic doublet lens, designed and manufactured by Thorlabs. This lens, which has a diameter of 50.8 mm, is part of Thorlabs' extensive catalog of optical elements, and it is specifically designed for use in the 1050-1700nm spectral range.

The lens is a multiplet, meaning it is composed of multiple optical elements. The specific geometry of these elements is as follows: the first element has a radius of curvature (r1) of 91.6, the second element has an r2 of -95.9, and the third element has an r3 of 130.6. The thickness of the lens at the edge is 10.7, while the thickness at the center of the first and second elements is 8.8 and 3, respectively. The lens does not have an inner or outer radius.

The lens is made from two types of Schott glass: N-SF10 and N-SF6. Both of these glasses are known for their excellent optical properties in the near-infrared region. The lens is coated with Thorlabs' AC1050-1700-C coating on both the front and back surfaces, which is designed to optimize performance in the 1050-1700nm spectral range.

The lens is unmounted, meaning it does not come with any mechanical housing or mounting hardware. This allows users to integrate the lens into their own custom optical systems, providing flexibility in design and application. According to Thorlabs' website, the lens is currently in stock, indicating that it is readily available for purchase and delivery.