G311385000 12.7 mm Dia. N-BK7 Double-Convex Lens; EFL=80mm Uncoated

The G311385000 is a 12.7 mm diameter, double-convex lens made from N-BK7 glass, a popular choice for its high homogeneity and excellent transparency in the visible spectrum. This lens, sourced from Qioptiq Photonics, boasts an effective focal length (EFL) of 80mm, making it suitable for a wide range of optical applications.

The lens's geometry is characterized by its base shape, which is circular, and its edge thickness of 2.5mm. The center thickness is slightly greater at 3mm, contributing to the lens's overall robustness. The radii of curvature for the first and second surfaces are 81.166mm and -81.166mm, respectively, indicating a symmetric convex-convex design.

The lens's material, N-BK7, has a refractive index of 1.5168 at the specified wavelength of 587.6nm. This wavelength falls within the lens's operational range, ensuring optimal performance in visible light applications.

Notably, this lens is uncoated. While coatings can enhance performance by reducing surface reflections and improving transmission, an uncoated lens can be advantageous in certain applications, such as when cost-effectiveness is a priority or when the lens will be used in a controlled environment with minimal stray light.

For more information, including pricing and availability, please refer to the vendor's website at https://www.qioptiq-shop.com/en/Precision-Optics/Singlets/Symmetric-Convex-Lenses/Symmetric-convex-lenses-unmounted.html.