G313373400 12.7 mm Dia. N-BK7 Double-Concave Lens; EFL=-20mm

The G313373400 is a high-quality double-concave lens from Qioptiq Photonics, designed with precision and performance in mind. This lens boasts a 12.7 mm diameter and a center thickness of 1.5 mm, making it a compact yet robust option for various optical applications.

The lens features a negative focal length (EFL) of -20mm, indicating its concave-concave design. This design is particularly useful in applications that require light to be focused or diverged, such as in cameras, microscopes, or other optical instruments. The double-concave shape also ensures minimal spherical aberration, enhancing the overall image quality.

The lens is made from N-BK7, a high-grade borosilicate glass known for its excellent optical properties. This material ensures high transmittance across a wide spectrum, making the lens suitable for use with various wavelengths, including the specified 588 nm.

The G313373400 is coated with Qio Silver RAGV 45 on both the front and back surfaces. This coating enhances the lens's durability and resistance to environmental factors, while also reducing surface reflections and improving overall light transmission.