65-972 12.5 mm Dia. N-FK5/F2HT Achromatic Doublet; EFL=30mm UV-VIS 345-700nm

The 65-972 is a high-quality achromatic doublet lens from Edmund Optics, designed for use in the UV-VIS spectrum, specifically between 345-700nm. This lens, with a diameter of 12.5mm, is a multiplet type, featuring a complex geometry that includes three radii (r1, r2, r3) and multiple thickness measurements (thickness edge, thickness center, thickness center a).

The lens is composed of two types of glass, N-FK5 and F2HT, both from Schott. These materials are carefully selected to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic design of this lens ensures that the light is focused correctly, providing sharp and clear images across the entire UV-VIS spectrum.

The lens is coated with Edmund Optics' standard UV-VIS coating on both the front and back surfaces. This coating enhances the lens's performance by reducing reflection and increasing transmission, thereby improving the overall efficiency and quality of the optical system.

The lens has an effective focal length (EFL) of 30mm, making it suitable for a wide range of applications. The EFL, combined with the lens's diameter and the radii, determines the lens's angular field of view and magnification, which are crucial parameters in any optical system design.