This is a Plano-Concave Lens from Standa, a renowned vendor in the optical industry. The lens, identified as 14PCV150-05-2, is a spherical lens with a base shape of a circle. It has a diameter of 12.7 mm and a center thickness of 2.7 mm, while the edge thickness is 3 mm. The effective focal length (EFL) of this lens is -150 mm, indicating its diverging nature.
The lens is made from UVFS Mal-1965, a material specifically designed for use in the ultraviolet region of the spectrum. The wavelength of this lens is 355 nm, further emphasizing its suitability for ultraviolet applications.
Notably, this lens does not have any coating, which means it is uncoated. While coatings can enhance the performance of lenses by reducing reflections, increasing transmission, or providing other benefits, an uncoated lens can be suitable for certain applications where such enhancements are not required.
For more information about this lens, including its availability and potential applications, you can refer to the vendor's website at http://www.standaphotonics.com/lenses/plano-concave-lenses.php.