G052402331 12.7 mm Dia. N-BK7 Mounted Double-Concave Lens; EFL=-20mm

This is a G052402331 model lens, a high-quality optical component manufactured by Qioptiq Photonics. The lens is spherical in shape, featuring a base shape of a circle, and is designed for use in a wide range of optical applications.

The lens is made from N-BK7, a popular optical glass known for its excellent optical properties. It has a diameter of 12.7 mm and a center thickness of 1.5 mm. The lens's effective focal length (EFL) is -20mm, indicating that it is a double-concave lens. This type of lens is used to diverge light beams, making it ideal for applications that require the spreading of light.

The lens's geometry is characterized by its first and second radii (R1 and R2), which are -20.983 mm and 20.983 mm respectively. These radii determine the lens's curvature and, consequently, its optical properties. The lens's inner and outer radii are both 0, indicating that it is a symmetrical lens.

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 increasing transmission, making it more efficient in transmitting light.

The lens is mounted, making it ready for immediate use in optical systems. It is designed for use at a wavelength of 588 nm. The item data provides a link to the vendor's website, where more information about the lens and its specifications can be found.