This is a 12.7 mm diameter Double-Concave Lens, offered by Standa, a renowned vendor in the optical industry. The lens is designed with a base shape of a circle and features a double-concave geometry, making it suitable for a wide range of applications.
The lens has a center thickness of 3.2 mm and an edge thickness of 5 mm, providing a robust structure while maintaining a manageable weight. The effective focal length (EFL) of this lens is 12.7 mm, which is the same as its diameter, indicating a high level of convergence of light rays.
The lens is made of n-BK7 Schott, a high-quality optical glass known for its excellent transparency and low auto-fluorescence. This material is particularly suitable for applications in the visible spectrum, with a peak wavelength of 546 nm.
Notably, this lens does not come with any coating. While coatings can enhance the performance of lenses by reducing reflections, increasing transmission, or providing other benefits, an uncoated lens can be a cost-effective solution for applications where such enhancements are not required.
For more information about this lens, including its specifications and where to purchase it, please refer to the provided weblink, which has been verified to be valid and in stock.