LE1929 25.4 mm Dia. N-BK7 Positive Meniscus Lens; EFL=300mm Uncoated

The LE1929 is a spherical lens with a positive meniscus shape, sourced from the reputable optical components manufacturer, Thorlabs. This lens is made of N-BK7, a high-quality borosilicate glass commonly used in optical systems due to its excellent optical properties. The lens has a diameter of 25.4 mm and a thickness of 2 mm at the edge, with a center thickness of 2.5 mm.

The LE1929 has an effective focal length (EFL) of 300 mm, making it suitable for applications that require moderate magnification. The lens's front radius of curvature (R1) is 100.9 mm, while the back radius (R2) is 288.2 mm. The back focal length (BFL) is 296.5 mm. Notably, this lens does not have any coating, which might affect its performance in high-intensity light applications or when used with specific wavelengths.

The lens's geometry and material properties make it suitable for use in various applications, including imaging systems, beam shaping, and laser applications. However, users should consider the lens's lack of coating when designing their optical systems. The lens's uncoated surface may cause unwanted reflections, which could be mitigated by adding an anti-reflective coating or adjusting the system's design.