49-946-INK 20 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=80mm VIS 0° 425-675nm

The 49-946-INK is a high-quality achromatic doublet lens, boasting a 20 mm diameter and an effective focal length of 80 mm, specifically designed for the visible light spectrum ranging from 425 to 675 nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase through their official website.

This achromatic doublet is meticulously crafted from two types of Schott glass: N-BK7 and N-SF5. 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. By combining these materials, the 49-946-INK achieves superior color correction, making it an ideal choice for a wide range of applications.

The lens features a base shape that is circular, with a thickness of 4.51 mm at the edge and 4 mm at the center. The center thickness is further reduced to 2 mm, providing greater design flexibility. The lens's inner and outer radii are 0, indicating a symmetrical design that can help to reduce spherical aberration.

The 49-946-INK is coated with Edmund Optics' standard VIS-0 curve on both the front and back surfaces. This coating enhances the lens's transmission and reduces reflection, thereby improving overall system performance.