111-0550E 50.8 mm Dia. x 1200 mm FL; Uncoated; Double-Convex Lens

This is a 111-0550E Double-Convex Lens, sourced from EKSMA Optics, a renowned vendor in the optical components industry. The lens boasts a diameter of 50.8 mm and a focal length of 1200 mm, making it a high-performance component suitable for a wide range of applications.

The lens is made of BK7, a popular borosilicate crown glass known for its excellent optical properties. This material is characterized by a low refractive index and low dispersion, making it an ideal choice for various optical systems. The BK7 Schott designation indicates that the glass meets the stringent quality standards set by Schott, a leading manufacturer of specialty glass and glass-ceramics.

The lens features a double-convex geometry, meaning it has two spherical surfaces that curve outwards. This shape is often used in optical systems to focus or collimate light. The first radius of curvature (R1) is 1244.1, while the second radius of curvature (R2) is -1244.1, indicating that the lens has a symmetrical design.

The lens has a thickness of 4.5 mm at the edge and 5 mm at the center. The edge thickness is crucial in applications where the lens needs to be mounted, while the center thickness affects the optical performance of the lens.

The lens is uncoated, meaning it does not have any anti-reflective or other coatings. While coatings can enhance the performance of a lens by reducing reflections, increasing transmission, or providing other benefits, an uncoated lens can be a more cost-effective solution, depending on the application.

This lens is designed to work at a wavelength of 546 nm, a common reference wavelength in optical systems. However, it can be used with other wavelengths, depending on the specific requirements of the application.