LF4348 25.4 mm Dia. UVFS Negative Meniscus Lens; EFL=-300mm Uncoated

The LF4348 is a spherical lens with a concave-convex base shape and a circular design, sourced from the reputable vendor Thorlabs. This lens boasts a diameter of 25.4 mm and is specifically designed for use with a wavelength of 546 nm.

The lens features an EFL (Effective Focal Length) of -300mm, indicating its diverging nature. The EFL is a critical parameter when selecting lenses, as it significantly influences the image formation process. A negative EFL, as in this case, implies that the lens will spread out light rays, making it suitable for applications that require beam expansion or divergence.

The LF4348 has an inner radius of 0 and an outer radius of 0, suggesting a symmetrical design. The thickness at the edge is 4.1 mm, while the center thickness is 3.5 mm. These dimensions can impact the lens's performance, particularly in terms of optical aberrations and distortion.

The lens is made from UVFS material with the ID 1965. Unfortunately, the item data does not provide detailed information about this material. However, it is safe to assume that it has been specifically chosen for its optical properties, such as refractive index and dispersion, which are crucial for lens performance.

Notably, this lens is uncoated. Coatings are often applied to lenses to enhance their performance by reducing reflection, increasing transmission, or protecting the lens surface. The absence of a coating here may be due to specific application requirements or design considerations.