49-272 3 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=9mm VIS 0° 425-675nm

The 49-272 is a high-quality achromatic doublet lens, sourced from the renowned optical vendor Edmund Optics. This lens is designed for visible light applications, with a wavelength range of 425-675nm, and features a standard anti-reflection coating for optimal performance. The lens boasts a 3mm diameter and an effective focal length of 9mm, making it suitable for a wide range of optical systems.

The lens is constructed from two materials: N-BK7 and N-SF5, both from Schott. N-BK7 is a borosilicate crown glass, known for its excellent optical properties and high transmittance in the visible spectrum. N-SF5, on the other hand, is a fluorite-containing glass, which offers superior dispersion characteristics, making it ideal for achromatic designs.

The lens geometry is carefully crafted, with a center thickness of 1.47mm and edge thickness of 2.19mm. The lens features three radii of curvature: r1 at 5.26mm, r2 at -3.98mm, and r3 at -12.05mm. The lens also has an inner radius of 0mm and an outer radius of 0mm.

The lens is coated with Edmund Optics' standard Vis-0 coating on both the front and back surfaces. This coating is designed to minimize reflection and optimize transmission in the visible spectrum. The coating status is valid, and the lens is currently in stock, ensuring quick and reliable delivery.