BICC-25.4/500.0C 25.4 mm Dia. x -485 mm FL; Uncoated; Double-Concave Lens

This is a double-concave lens, also known as a biconcave lens, sourced from the renowned optical components vendor, Laser Components. The lens is characterized by its concave-concave base shape and circular geometry, with a diameter of 25.4 mm and a thickness that varies from 3 mm at the center to 3.3 mm at the edge.

The lens has an effective focal length (EFL) of -485 mm, indicating that it is a diverging lens, causing incoming light rays to spread out after passing through it. The radii of curvature for the two surfaces of the lens are -500 mm and 500 mm, respectively. The lens is made of n-BK7 Schott, a popular optical glass known for its excellent optical properties.

The lens is designed to operate at a wavelength of 633 nm. It does not have any coating, which means it is uncoated. However, users can request custom coatings based on their specific requirements.

Please note that the link provided leads to the datasheet of similar lenses from Laser Components, as the exact datasheet for this specific lens was not available at the time of writing. The link is valid and indicates that the lens is in stock.