AC254-050-C 25.4 mm Dia. N-LAK22/N-SF6 Unmounted Achromatic Doublet; EFL=50mm 1050-1700nm

The AC254-050-C is a high-quality achromatic doublet lens, sourced from the renowned optical component manufacturer, Thorlabs. This lens, with a diameter of 25.4 mm, is designed for use in the infrared spectrum, specifically between 1050nm and 1700nm, making it ideal for a wide range of applications in this spectral range.

The lens is constructed from two types of Schott glass, N-LAK22 and N-SF6, which are carefully selected and arranged to minimize chromatic aberration, a common issue in lens systems. The lens has a focal length of 50mm, as indicated by the 'EFL=50mm' in its name, providing a reasonable compromise between field of view and image resolution.

The lens geometry is also noteworthy. It has an edge thickness of 7.3mm and a central thickness of 9mm for the first surface and 1.8mm for the second. The curvature radii are r1=22.9mm, r2=-25.9mm, and r3=194.5mm, which contribute to its excellent optical performance.

The lens is coated with Thorlabs' proprietary AC1050-1700-C coating on both the front and back surfaces, enhancing its transmission in the specified spectral range and providing protection against environmental hazards. The lens is unmounted, allowing users to integrate it into their systems using their preferred mounting solution.