33-925 75 mm Dia. N-BAK1/N-SF8 Achromatic Doublet; EFL=150mm VIS-NIR 400-1000nm

The 33-925 is a high-quality achromatic doublet lens, boasting a 75 mm diameter and an effective focal length of 150 mm, specifically designed for the visual (VIS) and near-infrared (NIR) spectrum of 400-1000 nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase through their official website.

This lens is a multiplet, meaning it is composed of multiple optical elements to achieve superior performance. The doublet configuration consists of two components: N-BAK1 from Schott and N-SF8 from Schott. These materials are known for their excellent optical properties, contributing to the lens's high-performance capabilities.

The lens's geometry is meticulously designed, with a diameter of 75 mm, a thickness at the edge of 36.01 mm, and an inner radius of 0 mm. The outer radius is also 0 mm, and the effective focal length (EFL) is 150 mm. The first radius (r1) is 92.05 mm, while the second radius (r2) is -72.85 mm, and the third radius (r3) is -305.87 mm. The center thickness is 23.2 mm, and the center thickness 'a' is 23.1 mm.

The lens is coated with the EDM VIS-NIR 0SP2002000 coating on both the front and back surfaces. This coating enhances the lens's performance in the VIS-NIR spectrum, ensuring optimal light transmission and reducing unwanted reflections.