This is a 14BCV40-05-1 Double-Concave Lens, sourced from the reputable vendor, Standa. The lens is characterized by its concave-concave base shape and circular geometry, with a diameter of 12.7 mm and a thickness that varies from 3 mm at the edge to 2.4 mm at the center. The lens has an effective focal length (EFL) of 40 mm, making it suitable for a variety of optical applications.
The lens is made from n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low dispersion. This makes the lens ideal for use in systems where high image quality and minimal chromatic aberration are required. The lens is designed to operate at a wavelength of 546 nm.
Notably, this lens is uncoated. While coatings can enhance the performance of lenses by reducing reflection, increasing transmission, or providing other benefits, an uncoated lens can be advantageous in certain applications. For instance, uncoated lenses can be more cost-effective and are often more resistant to damage from laser exposure.
Please note that the provided weblink is valid and indicates that the lens is in stock, making it readily available for your optical needs.