49-382-INK 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=160mm VIS-NIR 400-1000nm

The 49-382-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 40 mm, is designed for use in the visible to near-infrared spectrum, spanning 400 to 1000 nm. The lens is specifically engineered to minimize chromatic aberration, ensuring clear, focused images across the entire spectral range.

The lens features a focal length of 160 mm, indicated by its Effective Focal Length (EFL). This long focal length makes it suitable for applications requiring moderate magnification and a narrow field of view. The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring high optical quality and durability.

The 49-382-INK lens is coated with Edmund Optics' VIS-NIR0SP2002000 coating on both the front and back surfaces. This anti-reflection coating is designed to reduce surface reflections and increase transmission in the visible to near-infrared spectrum, further enhancing the lens' performance.

The lens geometry is also noteworthy, with a thickness at the edge of 9.48 mm and a center thickness of 8.5 mm. The lens also features three radii of curvature: r1 at 98.66 mm, r2 at -70.73 mm, and r3 at -205.72 mm. These parameters contribute to the lens' overall optical performance and its ability to deliver sharp, clear images.