AC254-200-AB 25.4 mm Dia. N-LAK22/N-SF10 Unmounted Achromatic Doublet; EFL=200mm 400-1100nm

The AC254-200-AB is a high-quality achromatic doublet lens, designed and manufactured by Thorlabs. This lens is part of Thorlabs' extensive catalog of optical elements, which 3DOptix has integrated into its advanced optical simulation software. The lens is unmounted, with a base shape of a circle, and features a diameter of 25.4 mm.

The lens's geometry is intricately designed, with an edge thickness of 7.3 mm, an inner radius of 0, and an outer radius of 0. The curvature radii are r1 = 117.1 and r2 = -142.1, and the center thicknesses are 5 mm and 3 mm for the first and second centers, respectively.

The lens is made from two types of materials, both from Schott: N-LAK22 and N-SF10. These materials have been carefully selected to ensure the lens's high performance. The lens is coated with THo AB ACHROMATIC AR on both the front and back surfaces, enhancing its optical properties.

The lens is a multiplet, meaning it is composed of multiple elements. This design allows for superior optical performance, particularly in terms of chromatic aberration correction. The effective focal length (EFL) of the lens is 200mm, and it is designed to operate within the wavelength range of 400-1100nm.

According to Thorlabs' website, the lens is currently in stock, indicating its availability for immediate purchase and use. The lens's catalog number, AC254-200-AB, can be used to locate it on Thorlabs' website or other online retailers.