LE1613-A 50.8 mm Dia. N-BK7 Positive Meniscus Lens; EFL=250mm 350-700nm

The LE1613-A is a 50.8 mm diameter Spherical Lens with a Positive Meniscus shape, sourced from the reputable optical components manufacturer, Thorlabs. This lens is designed for use in the ultraviolet-visible (UV-VIS) spectrum, specifically optimized for wavelengths between 350nm and 700nm.

The lens is made from N-BK7, a high-quality borosilicate glass commonly used in optical systems due to its excellent optical properties. The lens's base shape is circular, with a diameter of 50.8mm. It has a center thickness of 5.5mm and an edge thickness of 2.9mm, providing a robust and durable structure.

The LE1613-A has an effective focal length (EFL) of 250mm, making it suitable for various applications that require long focal lengths. The front and back surfaces of the lens are coated with THo A BBAR, a broadband anti-reflection coating that enhances transmission and reduces surface reflections, thereby improving overall system performance.

The lens's geometry includes a first radius (R1) of 82.5mm and a second radius (R2) of 224.7mm. The back focal length (BFL) is 243.5mm, and the inner and outer radii are both 0mm. This specific combination of parameters contributes to the lens's high-performance characteristics.