G311314322 22.4 mm Dia. N-BK7 Double-Convex Lens; EFL=40mm 450-700nm

This is a G311314322 model lens from Qioptiq Photonics, a renowned vendor in the field of precision optics. The lens is a symmetric convex-convex type, featuring a base shape of a circle, which is a common design for many optical applications due to its wide field of view and minimal distortion.

The lens has a diameter of 22.4 mm and a thickness of 2 mm at the edge, while the center thickness is 5 mm. The effective focal length (EFL) of this lens is 40 mm, making it suitable for applications that require a longer focal length. The radii of curvature for the first and second surfaces are 41.867 mm and -41.867 mm, respectively, indicating a double-convex design.

The lens is made of n-BK7, a type of borosilicate glass known for its excellent optical properties, including high transparency and a low coefficient of thermal expansion. This makes the lens suitable for use in a wide range of temperatures and environments.

The lens is coated with qio bbar arb2visnbk7 on both the front and back surfaces. This coating is designed to reduce reflection and increase transmission, particularly in the visible light spectrum (450-700 nm). The lens's shape is spherical, which is the most common and simplest type of lens surface.