This is a high-quality double-concave lens, sourced from the reputable vendor Standa. The lens is designed with a spherical shape, featuring a base shape of a circle, and is part of the Spherical Lens (Concave-Concave) sub-type. The lens has a diameter of 12.7 mm and a thickness at the edge of 3 mm, while the center thickness is 2.2 mm. The effective focal length (EFL) of this lens is -25 mm, making it a concave lens.
The lens's geometry includes an inner radius of 0 and an outer radius of 0, with radii of curvature R1 and R2 being -26.30540614 mm and 26.30540614 mm, respectively. This specific lens is made of n-BK7 Schott material, a common choice for optical elements due to its excellent optical properties.
The lens is designed to work with a wavelength of 546 nm. It does not come with any coating, as indicated in the item data. However, users can explore various coating options from Standa's extensive catalog to enhance the lens's performance according to their specific needs.
Please note that the weblink provided leads to a valid page on Standa's website, indicating that this lens is currently in stock. For more information, users can visit the provided link.