G313214331 22.4 mm Dia. N-BK7 Double-Concave Lens; EFL=-40mm

This is a G313214331 model double-concave lens, featuring a 22.4 mm diameter and a center thickness of 1.5 mm. The lens is made of N-BK7, a popular optical glass from Schott, known for its excellent optical properties and high homogeneity. The lens has a double-concave geometry, with radii of curvature of -41.867 mm on both the front and back surfaces. This particular lens has an effective focal length (EFL) of -40 mm, making it suitable for use in various applications that require negative lenses, such as beam expansion or collimation.

The lens is coated with Qio AL RALVIS AOI 45 on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and improving transmission, particularly in the visible spectrum around 588 nm. The lens's shape is spherical, which is a common and versatile geometry in optical systems due to its ease of manufacturing and use.

This lens is sourced from Qioptiq Photonics, a leading vendor in the field of precision optics. According to the vendor's information, the lens is in stock and available for immediate purchase. The vendor's website also provides further technical details and specifications, which can be useful for users who want to learn more about this product.