LB5922 12.7 mm Dia. CaF2 Double-Convex Lens; EFL=20mm Uncoated

The LB5922 is a spherical lens with a base shape of a circle, designed and manufactured by Thorlabs. This lens is a double-convex type, featuring a diameter of 12.7 mm and a center thickness of 4.5 mm. The edge thickness of the lens is 2 mm, providing a robust structure while maintaining a compact form factor.

The effective focal length (EFL) of the LB5922 is 20 mm, making it suitable for various applications that require a moderate focal length. The lens's first radius of curvature (R1) is 16.6 mm, while the second radius (R2) is -16.6 mm, indicating a symmetric, double-convex design.

This lens is made of Calcium Fluoride (CaF2), identified as "caf2 mal-1963" in the material ID. CaF2 is a popular material in optical applications due to its excellent transparency in the ultraviolet, visible, and near-infrared regions of the spectrum. It also exhibits a relatively high refractive index and low dispersion, making it an ideal choice for achromatic doublets and other high-performance optical systems.

The LB5922 is uncoated, meaning it does not have any additional layers to enhance its optical properties or protect it from environmental factors. While this may limit its performance in certain applications, it can be advantageous in others where minimal reflection or dispersion is required.

According to the vendor's website, this item is currently in stock, ensuring quick delivery and availability for immediate use in your optical system.