LB1212-A N-BK7 Bi-Convex Lens; Dia:9.0 mm; f=20.0 mm ARC 350-700nm

The LB1212-A 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 9.0 mm and a focal length of 20.0 mm, making it a versatile choice for a wide range of optical applications.

The lens is crafted from N-BK7, a popular borosilicate glass known for its excellent optical properties. This material, also known as Schott glass, ensures high transmission and low dispersion, making it ideal for applications that require high-precision optics.

The LB1212-A features an anti-reflection coating, specifically designed for the wavelength range of 350-700 nm. This coating significantly reduces surface reflections, thereby improving the overall efficiency and performance of the lens.

The lens geometry is spherical, with radii of curvature of 20.1 mm for the first surface and -20.1 mm for the second surface. This bi-convex design provides a large acceptance angle, making it suitable for use in systems with a wide range of incident angles.

The lens has a central thickness of 2.8 mm and an edge thickness of 1.8 mm, providing robustness and durability. Despite its robust construction, the lens remains lightweight and easy to handle, making it a convenient choice for laboratory and industrial applications.