LE1929-B 25.4 mm Dia. N-BK7 Positive Meniscus Lens; EFL=300mm 650-1050nm

The LE1929-B is a 25.4 mm diameter Spherical Lens with a Positive Meniscus shape, sourced from the reputable vendor Thorlabs. This lens is specifically designed for use within the wavelength range of 650-1050nm, making it suitable for a variety of optical applications within this spectrum.

The lens features an effective focal length (EFL) of 300mm, which is a critical specification for determining the lens's magnification power and overall performance in an optical system. The EFL is a measure of the distance from the lens's center to the point at which light rays converge or diverge, depending on the lens's curvature.

The LE1929-B's geometry includes a 2mm edge thickness and a 2.5mm center thickness, contributing to its robustness and durability. The lens's front and back surfaces are coated with THo BBAR, a broadband anti-reflection coating that enhances transmission and reduces surface reflections, thereby improving overall system performance.

The lens is made from N-BK7, a high-quality borosilicate glass commonly used in optical systems due to its excellent optical properties and chemical resistance. The lens's base shape is circular, and its radii of curvature are 100.9mm and 288.2mm for the front and back surfaces, respectively.

According to the vendor's website, the LE1929-B is currently in stock, indicating its availability for immediate purchase and use in your optical projects.