LD2297-A N-SF11 Bi-Concave Lens; Dia:25.4 mm; f=-25.0 mm ARC 350-700nm

The LD2297-A is a high-quality bi-concave lens offered by Thorlabs, a leading vendor in the optical industry. This lens is made from n-SF11 Schott glass, a material known for its excellent optical properties. The lens features a base shape of a circle, with a diameter of 25.4 mm, providing a wide area of focus.

The lens has a center thickness of 3 mm and an edge thickness of 7.2 mm, offering a robust and durable structure. The effective focal length (EFL) of this lens is -25 mm, indicating its concave nature. The front and back surfaces of the lens are coated with ARC 350-700nm coating, enhancing its transmission capabilities within the specified wavelength range.

The lens's geometry includes radii of curvature of -39.6 mm for the first surface and 39.6 mm for the second surface. The back focal length (BFL) is -25.6 mm. The lens is designed to operate at a wavelength of 587.6 nm, making it suitable for a wide range of optical applications.