45-786 6 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=20mm NIR II 750-1550nm

The 45-786 is a high-quality achromatic doublet lens, boasting a 6 mm diameter and an effective focal length of 20 mm, specifically designed for use within the Near-Infrared II (NIR II) spectrum of 750-1550 nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase directly from their website.

The lens is constructed from two distinct materials, N-LAK22 and N-SF6, both from the Schott glass family. These materials were carefully selected to minimize chromatic aberration, a common issue in optical systems, thereby ensuring superior image quality. The lens features a sophisticated geometry, with an inner radius of 0 mm, an outer radius of 0 mm, and a center thickness of 3 mm. The edge thickness measures 3.86 mm, while the front and back radii are 11.29 mm and -10.63 mm, respectively. The lens also includes an additional central thickness of 1.3 mm, further enhancing its optical performance.

The 45-786 lens is coated with the EDM NIR-II standard curve on both the front and back surfaces. This specialized coating is designed to optimize the lens's performance within the NIR II spectrum, ensuring efficient light transmission and minimal reflection. The lens is classified as a multiplet, indicating that it is composed of multiple elements, each contributing to its overall optical performance.