112-1221E 25.4 mm Dia. x -250 mm FL; Uncoated; Plano-Concave Lens

The 112-1221E is a plano-concave lens with a diameter of 25.4 mm and a focal length of -250 mm, making it a negatively powered lens. This lens is sourced from EKSMA Optics, a reputable vendor in the optical components industry. The lens is uncoated, which means it does not have any additional layers to protect it from environmental factors or to enhance its optical properties.

The lens's geometry is characterized by its diameter, thickness edge, and thickness center. The diameter is 25.4 mm, and the thickness edge is 4 mm, while the thickness center is 3.3 mm. The radii of curvature are -118.9 mm for the first surface and 0 mm for the second surface, indicating a plano surface. The lens's effective focal length (EFL) is -250 mm.

This lens is made of UVFS MAL-1965, a material with a refractive index suitable for use in the ultraviolet region of the spectrum, specifically at a wavelength of 355 nm. The lens's shape is spherical, which is the most common type of lens surface.

The lens is available for purchase through the vendor's website, and the link provided indicates that it is currently in stock. This lens is a suitable option for applications that require a negatively powered lens with a specific diameter and focal length.