AC508-200-B-ML 50.8 mm Dia. N-LAK22/N-SF6HT Mounted Achromatic Doublet; EFL=200mm 650-1050nm

The AC508-200-B-ML is a mounted achromatic doublet lens, designed and manufactured by Thorlabs. This lens is specifically engineered for use within the spectral range of 650-1050nm, making it suitable for a wide range of applications within this wavelength range.

The lens features a 50.8mm diameter, providing a substantial surface area for light transmission. The lens is constructed from two types of Schott glass, N-LAK22 and N-SF6HT, each selected for their specific optical properties. The use of these materials ensures high-quality performance and precise optical characteristics.

The lens is coated with Thorlabs' proprietary AC650-1050-B coating on both the front and back surfaces. This coating is designed to enhance the lens' performance within the 650-1050nm spectral range, improving transmission and reducing unwanted reflections.

The lens geometry is complex, featuring three radii of curvature (r1, r2, and r3) and three distinct thicknesses (edge, center 1, and center 2). This design allows for precise control over the lens' optical properties, enabling it to deliver high-quality performance in a variety of applications.

The lens is mounted, providing a convenient and secure method of integration into optical systems. The mount ensures the lens remains properly aligned, reducing the need for frequent adjustments and contributing to the overall stability of the system.