111-0504E 50.8 mm Dia. x 50 mm FL; Uncoated; Double-Convex Lens

The 111-0504E is a double-convex lens with a diameter of 50.8 mm and a focal length of 50 mm. This lens is sourced from EKSMA Optics, a reputable vendor known for their high-quality optical components. The lens is made of BK7 Schott, a popular glass type in the optical industry due to its excellent optical properties and versatility.

The lens features a base shape of a circle, with a thickness of 1.4 mm at the edge and 15.6 mm at the center. The inner and outer radii are 0 mm, and the radii of curvature are 49.1 mm for both the first and second surfaces. The effective focal length (EFL) is 50 mm, which is the distance from the lens's second principal point to the focal point.

This lens is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. While coatings can enhance the performance of a lens by reducing reflections, increasing transmission, or providing other benefits, uncoated lenses can be suitable for certain applications where such enhancements are not required.

The wavelength for this lens is 546 nm, which is a common reference wavelength in the optical industry. This wavelength falls within the visible light spectrum, specifically in the green region.