G063871322 25.4 mm Dia. N-BK7 Mounted Plano-Concave Lens; EFL=-50mm 450-700nm

This is a 25.4 mm diameter Plano-Concave lens, manufactured by Qioptiq Photonics, a renowned name in the field of precision optics. The lens is made of N-BK7, a popular glass type known for its excellent optical properties, making it suitable for various applications.

The lens features a negative focal length (EFL) of -50mm, indicating that it diverges incoming light. This makes it ideal for use in applications where beam expansion or divergence is required. The lens is designed to work within the wavelength range of 450-700nm, covering the visible light spectrum, which is commonly used in various optical systems.

The lens is coated with Qio Bbar Arb2visnbk7 on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving the overall efficiency of the optical system.

The lens is spherical in shape, a common geometry for optical lenses due to its ease of manufacturing and good optical performance. The lens has a center thickness of 1.5mm, providing sufficient mechanical strength while maintaining minimal optical aberrations.