G063058000 22.4 mm Dia. N-BK7 Mounted Double-Concave Lens; EFL=-20mm Uncoated

This is a G063058000 22.4 mm Dia. N-BK7 Mounted Double-Concave Lens, a high-quality optical component sourced from Qioptiq Photonics. The lens, which has a diameter of 22.4 mm, is designed for use in a variety of optical systems and applications.

The lens is made from N-BK7, a type of borosilicate glass known for its excellent optical properties. This material is often used in high-precision applications due to its low coefficient of thermal expansion and high transmittance across a wide range of wavelengths. The lens's double-concave geometry, with radii of curvature of -20.833 mm for both the front and rear surfaces, contributes to its focusing power.

The lens has an effective focal length (EFL) of -20 mm, which is a measure of its focusing power. A negative EFL indicates that this is a diverging lens, meaning it spreads out light rays. This can be useful in applications where a beam needs to be expanded or where a virtual image needs to be created.

The lens is uncoated, meaning it does not have any additional layers applied to its surfaces to alter its optical properties. This can be advantageous in certain applications where a natural, unaltered optical surface is desired. However, it's important to note that uncoated lenses can be more susceptible to surface reflections and may not perform as well in high-light conditions.

The lens is mounted, which means it is ready for immediate use in an optical system. This can save time and effort in the assembly process. The exact nature of the mount is not specified in the provided data, so users should consult the vendor's website or contact their sales representative for more detailed information.