LA5817-D 25.4 mm Dia. CaF2 Plano-Convex Lens; EFL=100mm 1.65-3µm

The LA5817-D is a Plano-Convex lens with a diameter of 25.4 mm, designed for use in the infrared spectrum with a wavelength of 588 nm. This lens is sourced from Thorlabs, a reputable vendor known for their high-quality optical components.

The lens is made from Calcium Fluoride (CaF2), a material with a high transmission range in the infrared spectrum, making it ideal for applications that require high-performance in this range. The lens has an effective focal length (EFL) of 100 mm, providing a moderate level of magnification.

The LA5817-D features a double-side broadband anti-reflection coating, denoted as 'tho d bbar'. This coating is designed to reduce surface reflections, thereby increasing the amount of light transmitted through the lens. The thickness of the lens at the edge is 2 mm, while the center thickness is 3.9 mm, providing a good balance between weight and optical performance.

The lens has a spherical shape, with a front radius of curvature (R1) of 43.4 mm. The inner and outer radii are both zero, indicating a plano-convex design. This design is often used in optical systems where a high level of optical performance is required, but where the size and weight of the lens need to be kept to a minimum.