This is the G063071000 22.4 mm Dia. N-BK7 Mounted Plano-Concave Lens, a high-quality optical component sourced from Qioptiq Photonics. The lens, which has a plano-concave shape, is designed with a spherical geometry, making it suitable for a wide range of optical applications.
The lens has a diameter of 22.4 mm and a center thickness of 1.5 mm. The effective focal length (EFL) of this lens is -50 mm, indicating that it is a diverging lens. The inner radius of the lens is 0 mm, and the outer radius is also 0 mm, which is typical for a plano-concave lens.
The lens is made of N-BK7, a type of borosilicate glass that is known for its excellent optical properties. This specific material is identified by the vendor as "n-bk7 schott", suggesting that it is a high-quality variant of this glass.
The lens is designed to operate at a wavelength of 588 nm. It does not have any coating, as indicated by the empty "coating" field in the item data. This means that the lens will not have any additional protection or enhancement for its optical properties.
The lens is currently in stock and can be purchased directly from the Qioptiq Photonics website. The item data also provides a direct link to the product page for convenience.