49-937-INK 6.25 mm Dia. N-SSK8/N-SF56 Achromatic Doublet; EFL=17.5mm VIS 0° 425-675nm

The 49-937-INK is a high-quality Achromatic Doublet lens, boasting a 6.25 mm diameter and an effective focal length (EFL) of 17.5mm. This lens is designed for use within the visible light spectrum, specifically between 425-675nm.

The lens is composed of 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 the EDM VIS-0 standard curve coating, enhancing its light transmission capabilities and providing excellent protection against environmental factors.

The lens geometry is meticulously designed, with a thickness of 3.18mm at the edge and 2.75mm at the center. The center thickness includes an additional 1mm of air space, contributing to the lens's overall performance. The lens's inner and outer radii are 0mm, indicating a circular shape.

This lens is a multiplet, meaning it is composed of multiple elements. The curvature of the first and second surfaces (r1 and r2) are 11.13mm and -9.22mm respectively, while the third surface (r3) has a curvature of -38.49mm. These curvatures contribute to the lens's excellent chromatic correction and overall optical performance.

The lens is sourced from Edmund Optics, a leading manufacturer of optical components. According to the vendor, the lens is currently in stock and available for immediate shipping. For more information, including pricing and technical specifications, please refer to the provided weblink.