LB4913 UV Fused Silica Bi-Convex Lens; Dia:1 in; f=125.0 mm Uncoated

The LB4913 UV Fused Silica Bi-Convex Lens is a high-quality optical component sourced from Thorlabs. This lens, with a diameter of 1 inch and a focal length of 125.0 mm, is designed for use in a wide range of applications that require excellent optical performance.

The lens is made of UV fused silica, a material known for its exceptional transparency across a broad spectrum, including the ultraviolet region. This makes the LB4913 an ideal choice for applications that involve UV light. The lens is uncoated, which means it does not have any additional layers to enhance its optical properties. However, its high-quality base material ensures reliable performance.

The lens geometry is spherical, with both surfaces curved outwards (convex). The first surface has a radius of curvature of 114.5 mm, while the second surface has a radius of -114.5 mm. This bi-convex design helps to minimize spherical aberration, ensuring that the lens focuses light accurately. The lens has a central thickness of 3.4 mm and an edge thickness of 2 mm, providing structural rigidity while maintaining a low profile.

The effective focal length (EFL) of the lens is 125 mm, which is the distance from the lens to the point where it focuses parallel light. The back focal length (BFL), which is the distance from the lens to the image plane when the lens is focused at infinity, is 123.8 mm.