49-374-INK 30 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=100mm VIS-NIR 400-1000nm

The 49-374-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 30 mm, is designed for use in the visible to near-infrared spectrum, spanning 400-1000nm. The lens is specifically engineered to minimize chromatic aberration, ensuring clear, focused images across the entire spectrum of operation.

The lens features a focal length of 100mm, indicated by the EFL (Effective Focal Length) parameter. This makes it suitable for applications requiring moderate magnification and a larger 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 geometry of the lens is carefully designed to optimize its performance. The edge thickness is 8.31mm, while the center thickness is 8.25mm. The lens also features a central thickness 'a' of 2.8mm. The radii of curvature for the three surfaces are R1 = 61.36mm, R2 = -44.3mm, and R3 = -128.9mm. These parameters are carefully chosen to provide the best possible optical performance.

The lens is coated with the EDM VIS-NIR 0SP2002000 coating on both the front and back surfaces. This coating is designed to enhance the lens's performance in the visible to near-infrared spectrum, reducing reflection and increasing transmission.