G313214322 22.4 mm Dia. N-BK7 Double-Concave Lens; EFL=-40mm 450-700nm

This is a G313214322 double-concave lens, featuring a diameter of 22.4 mm and a center thickness of 1.5 mm. The lens is made of N-BK7, a popular optical glass from Schott, known for its excellent optical properties and wide transparency range.

The lens has a negative focal length (EFL) of -40mm, making it suitable for use in various applications that require light convergence. It is designed to work within the wavelength range of 450-700nm, which covers the visible light spectrum, making it ideal for use in visible light applications.

The lens features a symmetric concave-concave geometry, with radii of curvature R1 and R2 being -41.867mm and 41.867mm respectively. This geometry allows for precise control of light paths, making the lens suitable for use in imaging systems, beam shaping, and other applications where precise light manipulation is required.

The lens is coated with Qio Bbar Arb2visnbk7 on both the front and back surfaces. This coating is designed to enhance the lens's performance in the visible light spectrum, reducing surface reflections and improving transmission.