LF1822-A 25.4 mm Dia. N-BK7 Negative Meniscus Lens; EFL=-100mm 350-700nm

The LF1822-A is a high-quality spherical lens from Thorlabs, designed with a negative meniscus shape and a base diameter of 25.4 mm. This lens is made from the renowned N-BK7 glass from Schott, a material known for its excellent optical properties and versatility. The lens features a center thickness of 3 mm and an edge thickness of 4.7 mm, providing a robust and durable structure.

The LF1822-A has an effective focal length (EFL) of -100 mm, making it suitable for a wide range of applications that require concave-convex lenses. The front and back surfaces of the lens are coated with THo A Bbar, a broadband anti-reflection coating that enhances transmission in the 350-700 nm range. This coating reduces surface reflections, improving the overall efficiency and performance of the lens.

The lens's geometry includes a first radius (R1) of 100 mm and a second radius (R2) of 33.7 mm, contributing to its unique optical properties. The back focal length (BFL) is -98.7 mm, and both the inner and outer radii are 0 mm. The lens's shape is spherical, ensuring high-quality imaging and light transmission.