The 112-1209E is a Plano-Concave Lens, a type of spherical lens, sourced from EKSMA Optics. This lens has a base shape of a circle and a diameter of 25.4 mm. The lens's thickness at the edge is 5.3 mm, while the thickness at the center is 3.1 mm. The effective focal length (EFL) of this lens is -75 mm, indicating its concave nature.
The lens's inner radius is 0 mm, and the outer radius is also 0 mm, which is typical for a plano-concave lens. The lens is made of UVFS Mal- 1965 material, optimized for a wavelength of 355 nm. This lens does not have any coating, as indicated in the item data.
For more information about this lens, including its availability and pricing, please refer to the vendor's website provided in the item data.