49-282 40 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=450mm VIS 0° 425-675nm

The 49-282 is a high-quality achromatic doublet lens, boasting a 40 mm diameter and an effective focal length (EFL) of 450mm, specifically designed for the visible light spectrum ranging from 425 to 675nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase on their official website.

The lens is constructed from two types of glass: N-BK7 from Schott and N-SF5 from Schott. 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 49-282 achieves superior image quality and color correction.

The lens geometry is meticulously designed, with an edge thickness of 8.94mm and a center thickness of 6mm. The first and second radii of curvature are 279.6mm and -199.51mm, respectively, while the third radius of curvature is -579.39mm. These parameters contribute to the lens's overall performance and optical characteristics.

The 49-282 is coated with the EDM VIS-0 STD curve on both the front and back surfaces. This coating enhances the lens's durability and resistance to environmental factors, while also reducing surface reflections and improving light transmission.