65-438 25 mm Dia. N-LAK14/N-SF66 Achromatic Doublet; EFL=30mm NIR II 750-1550nm

The 65-438 is a high-quality achromatic doublet lens, boasting a 25 mm diameter and a focal length of 30 mm, specifically designed for use in the near-infrared spectrum, covering the wavelength range of 750-1550nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase directly from their website, with the current status indicating it is in stock.

The lens is constructed from two types of Schott glass, N-LAK14 and N-SF66, which have been carefully selected and arranged to minimize chromatic aberration, a common issue in optical systems. The lens features a sophisticated geometry, with an inner radius of 0 and an outer radius also at 0, indicating a symmetrical design. The thickness at the edge of the lens is 8.77mm, reducing vignetting and ensuring a consistent image quality across the entire field of view.

The lens is coated with Edmund Optics' standard NIR-II coating on both the front and back surfaces, enhancing its transmission capabilities in the near-infrared spectrum. This coating is designed to provide superior performance, ensuring the lens delivers the highest quality images possible in its intended application range.

The 65-438 is a multiplet lens, meaning it is composed of multiple individual lenses. This design allows for a high level of customization and fine-tuning, ensuring the lens meets the specific requirements of its intended application. The lens has a thickness at the center of 11mm, with an additional 3mm of space provided for mounting or other optical components.