LF5394 25.4 mm Dia. CaF2 Negative Meniscus Lens; EFL=-1000mm Uncoated

The LF5394 is a spherical lens from Thorlabs, featuring a concave-convex base shape and a circular geometry. With a diameter of 25.4 mm, this lens is designed for use in optical systems that require a high level of precision. The lens has a center thickness of 4 mm and an edge thickness of 4.2 mm, providing a robust structure that can withstand the rigors of daily use.

The lens's effective focal length (EFL) is -1000mm, indicating that it is a negative meniscus lens. This type of lens is often used in optical systems to diverge light beams. The back focal length (BFL) of the lens is -997.4 mm, and the inner and outer radii are 0, suggesting a symmetrical design that can minimize optical aberrations.

The lens is made of CaF2 (Calcium Fluoride) material, which is known for its excellent optical properties, including a high transmission rate in the ultraviolet region. The material ID for this lens is "caf2 mal-1963", which can be used to verify its authenticity and compatibility with other optical components.

The lens is uncoated, meaning it does not have any anti-reflective or other coatings. While this may result in a higher level of light reflection, it can also provide a cost-effective solution for applications where such coatings are not necessary.

According to the vendor's website, this lens is currently in stock, indicating that it is readily available for purchase and delivery. The item data also includes a weblink to the vendor's product page, providing easy access to additional information and specifications.