LB1294-B N-BK7 Bi-Convex Lens; Dia:1 in; f=175.0 mm ARC 650-1050nm

The LB1294-B is a high-quality bi-convex lens, designed and manufactured by Thorlabs, a leading global supplier of photonics equipment. This lens boasts a diameter of 1 inch (25.4 mm) and a focal length of 175.0 mm, making it suitable for a wide range of optical applications.

The lens is made from N-BK7, a popular optical glass due to its excellent optical properties and high damage threshold. The N-BK7 material ensures high transmission in the visible and near-infrared regions, specifically from 650 to 1050 nm, making it ideal for use in laser systems and other applications where high transmission and low absorption are required.

The lens features a spherical geometry, with radii of curvature of 179.8 mm for both the front and back surfaces. This design allows for excellent imaging performance and low spherical aberration. The lens has a central thickness of 2.9 mm and an edge thickness of 2 mm, providing robustness and durability.

The LB1294-B is coated with Thorlabs' BBAR coating on both the front and back surfaces. This anti-reflection coating reduces surface reflections, enhancing the overall transmission of the lens. The BBAR coating is designed for the 650-1050 nm wavelength range, ensuring optimal performance in the intended application.