45-805 25 mm Dia. N-LAK22/N-SF6 Achromatic Doublet; EFL=75mm NIR II 750-1550nm

The 45-805 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and an effective focal length of 75mm, specifically designed for use in the near-infrared spectrum (NIR II) range of 750-1550nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase directly from their website.

The lens is constructed from two types of Schott glass, N-LAK22 and N-SF6, which are carefully selected and arranged to minimize chromatic aberration, a common issue in optical systems. The geometry of the lens is meticulously designed, with a thickness of 7.98mm at the edge, a central thickness of 6mm, and a central thickness 'a' of 4mm. The lens features three radii of curvature: r1 at 43.96mm, r2 at -42.9mm, and r3 at -392.21mm.

The lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces, ensuring optimal performance in the NIR II spectrum. This coating is designed to enhance transmission and reduce reflection, thereby improving the overall efficiency and quality of the optical system.

The 45-805 is a multiplet lens, meaning it is composed of multiple elements. This design allows for more precise control over the optical properties of the lens, resulting in superior image quality and performance. The lens is currently in stock and available for immediate purchase, making it an ideal choice for researchers and engineers in need of a high-quality, NIR II compatible lens.