L-BCX213 50 mm Dia. Double-Convex Lens; EFL=50mm Uncoated

The L-BCX213 is a high-quality double-convex lens offered by Ross Optical, a renowned vendor in the optical industry. This lens, with a diameter of 50 millimeters, is designed for use in a variety of optical applications, thanks to its precise geometry and material composition.

The lens features a base shape of a circle, which is common in many optical systems due to its symmetry and ease of alignment. The geometry of the lens includes a thickness of 2.6 millimeters at the edge and 16.3 millimeters at the center, providing a robust structure while maintaining a low profile. The effective focal length (EFL) of this lens is 50 millimeters, making it a versatile choice for many applications.

The L-BCX213 is made from n-bk7 Schott, a high-grade optical glass known for its excellent optical properties. This material is particularly suitable for applications that require high transmission in the visible spectrum, such as imaging systems, beam shaping, and collimation.

The lens's surface radii are 48.74 millimeters for the first surface and -48.74 millimeters for the second, indicating a strongly converging lens. However, the inner and outer radii are both zero, suggesting that this lens does not have any special anti-reflection coating. This might result in a higher Fresnel reflection loss at the air-glass interfaces, but it also means the lens is more cost-effective.