G052402322 12.7 mm Dia. N-BK7 Mounted Double-Concave Lens; EFL=-20mm 450-700nm

This is a G052402322 model lens, a high-quality optical component manufactured by Qioptiq Photonics. The lens is mounted and features a base shape of a circle, with a diameter of 12.7 mm. It is a double-concave spherical lens, designed with a center thickness of 1.5 mm and an effective focal length (EFL) of -20 mm, making it suitable for applications that require strong converging or diverging properties.

The lens is made of N-BK7, a popular borosilicate crown glass known for its excellent optical properties, including a high Abbe number and low dispersion. This makes the lens ideal for use in a wide range of wavelengths, specifically from 450 to 700 nm.

The G052402322 lens comes with broadband anti-reflection coatings on both the front and back surfaces. These coatings, identified as 'qio bbar arb2visnbk7', are designed to minimize surface reflections and increase transmission, thereby enhancing the overall performance of the lens in its intended application.

Please note that the inner and outer radii of the lens are both 0, indicating that this lens does not have any aspherical components. The lens's geometry is purely spherical, which is often preferred for its simplicity and cost-effectiveness in many optical systems.