LE4560 50.8 mm Dia. UVFS Positive Meniscus Lens; EFL=200mm Uncoated

The LE4560 is a spherical lens with a base shape of a circle, designed and manufactured by Thorlabs. This lens falls under the category of a Spherical Lens (Convex-Concave) subtype, featuring a diameter of 50.8 mm. The lens has a positive meniscus design, which means it is thicker at the center than at the edges. The edge thickness is 2.9 mm, while the center thickness is 6.6 mm, providing a robust structure and efficient light transmission.

The Effective Focal Length (EFL) of the LE4560 is 200mm, making it suitable for applications that require moderate to high magnification. The lens's geometry includes an inner radius of 0 mm and an outer radius of 0 mm, indicating a symmetrical design. The Back Focal Length (BFL) is equal to the EFL, at 193.4 mm.

This lens is made of UVFS material with the Mal-1965 ID. It is designed to work with a wavelength of 588 nm. The lens does not come with any coating, which means it is uncoated. This could lead to a decrease in transmission and an increase in reflection, especially at the edges of the spectrum. However, uncoated lenses are often more cost-effective and can be suitable for many applications.