G052402000 12.7 mm Dia. N-BK7 Mounted Double-Concave Lens; EFL=-20mm Uncoated

This is a G052402000 12.7 mm Dia. N-BK7 Mounted Double-Concave Lens, featuring an effective focal length (EFL) of -20mm and a diameter of 12.7mm. The lens is sourced from Qioptiq Photonics, a renowned vendor in the field of precision optics.

The lens is made of N-BK7, a popular glass type in the optical industry known for its excellent optical properties. This material is often used in high-quality optical systems due to its low optical dispersion and high Abbe number. The N-BK7 Schott designation indicates that the glass meets the specifications set by Schott, a leading manufacturer of optical glass.

The lens features a double-concave geometry, meaning it has two concave surfaces. The radii of these surfaces are -20.983mm and 20.983mm respectively. The lens has a center thickness of 1.5mm. The inner and outer radii are both 0, indicating that the lens has no peripheral curvature.

The lens is uncoated, meaning it does not have any anti-reflective or other coatings applied to its surfaces. This can be beneficial in certain applications where the natural properties of the glass are desired, or where cost considerations are a factor. However, it should be noted that uncoated lenses can suffer from increased reflection and reduced transmission, especially at higher wavelengths.

The lens is in stock and available for purchase. More information, including pricing and availability, can be found on the Qioptiq Photonics website.