47-735 20 mm Dia. N-BAF10/N-SF10 Achromatic Doublet; EFL=40mm VIS 0° 425-675nm

The 47-735 is a high-quality achromatic doublet lens, boasting a 20 mm diameter and an effective focal length (EFL) of 40 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 website.

The lens is constructed from two types of Schott glass, N-BAF10 and N-SF10, which are renowned for their excellent optical properties. The front and back surfaces of the lens are coated with the EDM VIS-0 standard curve coating, enhancing its light transmission capabilities and overall performance.

The lens geometry is meticulously designed, with a thickness of 7.83 mm at the edge, a center thickness of 8 mm, and a 2 mm air gap (thickness center a). The lens features three radii of curvature: r1 at 27.63 mm, r2 at -17.58 mm, and r3 at -171.25 mm. The inner and outer radii are both zero, indicating a circular shape.

This lens is a multiplet, meaning it is composed of multiple optical elements. The multiplet design helps to correct chromatic aberrations, a common issue in lens systems, thereby improving the image quality. The 47-735 lens is an excellent choice for various applications that require high-performance optics within the specified visible light spectrum.