47-691-INK 6.25 mm Dia. N-SSK8/N-SF10 Achromatic Doublet; EFL=15mm VIS 0° 425-675nm

The 47-691-INK is a high-quality Achromatic Doublet Lens, boasting a 6.25 mm diameter and an effective focal length (EFL) of 15 mm. This lens is designed for use within the visible light spectrum, specifically catering to wavelengths between 425 and 675 nm.

The lens is crafted from two distinct materials, N-SSK8 and N-SF10, both from the reputable Schott glass catalog. These materials are carefully selected to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points.

The lens features a standard curve coating on both the front and back surfaces, denoted as 'edm vis-0 std curve'. This coating enhances the lens's durability and performance, providing improved resistance to environmental factors and ensuring optimal light transmission.

The geometry of the lens is meticulously designed, with a central thickness of 2.7 mm and an edge thickness of 2.64 mm. The lens's inner and outer radii are 0, and it has a first radius (r1) of 7.95 mm and a second radius (r2) of -7.25 mm. The third radius (r3) is -277.83 mm. This specific geometry is engineered to provide superior optical performance.

The lens is available from Edmund Optics and is currently in stock, as indicated by its weblink status. For more detailed information, including pricing and availability, users are encouraged to visit the provided weblink.