The 112-0231E is a plano-concave lens with a diameter of 25.4 mm and a focal length of -200 mm, sourced from EKSMA Optics. This lens is a spherical type, designed with a base shape of a circle, and is uncoated.
The lens's geometry includes a thickness edge of 3.8 mm and a thickness center of 3 mm. The inner and outer radii are both zero, indicating a plano surface on one side and a concave surface on the other. The lens is made of n-BK7 Schott material, a common type of optical glass known for its excellent optical properties.
The lens is designed to operate at a wavelength of 546 nm. The provided web link leads to the vendor's page, where users can find more information about this product, including its availability and pricing. This lens is a valuable addition to any optical system that requires a concave lens in its design.