354140-C 2.4 mm Dia. D-ZK3 Molded Glass Aspheric Lenses; EFL=1.5 mm; NA=0.58 AR 1050-1700nm

The 354140-C is a high-quality aspheric lens from Thorlabs, designed for use in a wide range of optical applications. This lens is molded from D-ZK3 glass, a material known for its excellent optical properties and durability. The lens has a diameter of 2.4 mm and a thickness of 0.475 mm at the edge, making it suitable for use in compact optical systems.

The lens features an effective focal length (EFL) of 1.5 mm, which is a crucial parameter in lens selection. This EFL makes the lens ideal for use in systems where a short focal length is required. The lens also has a numerical aperture (NA) of 0.58, which determines the light-gathering capability of the lens. A higher NA allows for a wider angle of acceptance, making this lens suitable for applications where high light-gathering capability is essential.

The lens is coated with a broadband anti-reflective coating, suitable for use in the 1050-1700nm wavelength range. This coating reduces unwanted reflections, improving the overall efficiency and performance of the optical system. The lens is designed to be used in a circular configuration, making it compatible with a wide range of optical components.