49-288 50 mm Dia. N-BAK4/N-SF10 Achromatic Doublet; EFL=300mm VIS 0° 425-675nm

The 49-288 is a high-quality achromatic doublet lens, boasting a 50 mm diameter and an effective focal length of 300 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.

The lens is constructed from two types of Schott glass: N-BAK4 and N-SF10. 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 49-288 achieves superior image quality with minimal color fringing.

The lens geometry is meticulously designed, with a diameter of 50 mm, a thickness at the edge of 10.24 mm, and a center thickness of 9 mm. The lens features three radii of curvature: r1 at 173.11 mm, r2 at -164.03 mm, and r3 at -709.83 mm. These parameters contribute to the lens's overall optical performance, providing a balanced compromise between field of view, resolution, and distortion.

The 49-288 is coated with Edmund Optics' standard Vis-0 coating on both the front and back surfaces. This anti-reflection coating enhances the lens's transmission in the visible spectrum, reducing unwanted reflections and improving overall light efficiency.