SLB-50-300N 50.0 mm Dia. x -300.0 mm FL; Plano-Concave Lens Uncoated

The SLB-50-300N is a Plano-Concave Lens with a diameter of 50.0 mm and a focal length of -300.0 mm, sourced from OptoSigma. This lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence.

The lens geometry features a thickness edge of 5.0 mm and a thickness center of 3.0 mm, ensuring robustness and precision. The inner and outer radii are both 0.0 mm, indicating a planar surface on one side and a concave surface on the other. The effective focal length (EFL) is -300.0 mm, and the back focal length (BFL) is -302.0 mm, suggesting a long focal distance and a wide field of view.

This lens is uncoated, meaning it does not have any anti-reflective or other surface treatments. While this may result in higher reflective losses, it also means that the lens can be used in a wider range of applications without the risk of coating-specific limitations.

The lens is designed for use at a wavelength of 546.1 nm, making it suitable for applications in the visible light spectrum. It is a spherical lens, which is a common choice due to its ease of manufacturing and good optical performance.