49-781-INK 25.4 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=76.2mm VIS 0° 425-675nm

The 49-781-INK is a high-quality Achromatic Doublet lens, boasting a 25.4 mm diameter and an effective focal length (EFL) of 76.2mm. This lens is designed for use within the visible light spectrum, specifically between 425-675nm.

The lens is crafted from two types of Schott glass, N-SSK8 and N-SF56, which are renowned for their optical clarity and durability. The front and back surfaces of the lens are coated with EDmund Optics' standard Vis-0 coating, providing excellent light transmission and protection against environmental factors.

The lens geometry is meticulously designed, with a thickness of 7.85mm at the edge and 7mm at the center, ensuring optimal light refraction and minimal distortion. The inner and outer radii are 0, indicating a uniform curvature throughout the lens. The r1 and r2 values are 50.85mm and -40.06mm respectively, while the r3 value is -148.78mm, further enhancing the lens's optical performance.

This lens is a multiplet, meaning it is composed of multiple elements to achieve superior optical performance. The multiplet design, coupled with the high-quality materials and coatings, makes this lens an excellent choice for a wide range of optical applications.

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