49-342 18 mm Dia. N-BAF10/N-SF10 Achromatic Doublet; EFL=40mm VIS-NIR 400-1000nm

The 49-342 is a high-quality achromatic doublet lens, designed and manufactured by Edmund Optics. This lens, with a diameter of 18 mm, is specifically designed for use in the visible to near-infrared spectrum, spanning from 400 to 1000 nm. The lens features an effective focal length (EFL) of 40 mm, making it suitable for a wide range of optical applications.

The lens is composed of two elements: N-BAF10 and N-SF10, both from Schott. These materials are known for their excellent optical properties, making them ideal for use in high-precision optical systems. The lens features a center thickness of 5.98 mm and an edge thickness of 5.84 mm, providing robustness and durability.

The lens is coated with Edmund Optics' VIS-NIR coating (edm visnir0sp2002000), which is applied to both the front and back surfaces. This coating is designed to enhance the lens' performance in the visible to near-infrared spectrum, reducing surface reflections and improving transmission.

The lens' geometry is characterized by its base shape, which is circular, and its radii. The first radius (r1) is 26.97 mm, the second radius (r2) is -17.64 mm, and the third radius (r3) is -205.03 mm. These radii contribute to the lens' overall optical performance, helping to correct chromatic aberrations and improve image quality.