AC254-400-B 25.4 mm Dia. SF5/N-SF6HT Unmounted Achromatic Doublet; EFL=400mm 650-1050nm

The AC254-400-B is a high-quality unmounted achromatic doublet lens, designed and manufactured by Thorlabs. This lens is specifically engineered for use within the 650-1050nm wavelength range, making it suitable for a wide array of optical applications.

The lens features a base shape of a circle, with a diameter of 25.4mm, providing a versatile and compact design. The edge thickness of the lens measures 4.8mm, while the center thickness varies between 3.5mm and 1.8mm, ensuring optimal light transmission and minimal distortion.

The lens is composed of two materials, SF5 and N-SF6HT, both from Schott. These materials are carefully selected for their optical properties, contributing to the lens's high performance. The lens is coated with tho ac650-1050-b on both the front and back surfaces, further enhancing its performance within the specified wavelength range.

The lens is classified as a multiplet, indicating that it is composed of multiple optical elements. This design helps to correct chromatic aberrations, ensuring sharp and clear images. The lens's geometry includes an inner radius of 0mm and an outer radius of 0mm, with curvature radii of r1=83.6mm, r2=-106.41mm, and r3=181.55mm.

The lens is currently in stock and available for immediate purchase through the Thorlabs website. For more information, please refer to the provided weblink.