33-917 30 mm Dia. N-BAF10/N-SF57 Achromatic Doublet; EFL=40mm MgF2 400-700nm

The 33-917 is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens is designed with a base shape of 30 mm diameter and a focal length of 40 mm, making it suitable for a wide range of optical applications.

The lens is composed of two types of glass, N-BAF10 and N-SF57, both from Schott. This combination is strategically chosen to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic design ensures that the lens focuses both red and blue light at the same point, delivering sharper images.

The lens features a robust coating of MgF2 on both the front and back surfaces. This coating enhances the lens's light transmission capabilities, particularly in the 400-700 nm range, which covers the visible light spectrum. The coating also reduces surface reflections, thereby improving the overall image quality.

The geometry of the lens includes a thickness of 9.87 mm at the edge, with the inner and outer radii being 0. The center thickness is 10.9 mm, and the thickness at the center a is 4.6 mm. These specifications contribute to the lens's overall performance and should be carefully considered when integrating the lens into an optical system.