88-598-INK 75 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=400mm VIS-NIR 400-1000nm

The 88-598-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 75 mm, is designed for use in the visible (VIS) and near-infrared (NIR) spectrum, specifically catering to the wavelength range of 400-1000nm.

The lens is a multiplet, composed of two distinct materials: N-BK7 from Schott and N-SF5 from Schott. This combination is strategically chosen to minimize chromatic aberration, a common issue in lens systems, thereby ensuring superior image quality.

The lens features an effective focal length (EFL) of 400mm, making it suitable for applications requiring a longer focal length. The geometry of the lens is meticulously designed, with a thickness at the edge of 12.84mm and a center thickness of 11.05mm. The lens also has a central thickness 'a' of 6mm, providing additional design flexibility.

The lens is coated with EDm VISNIR0SP2002000, a proprietary coating from Edmund Optics, on both the front and back surfaces. This coating enhances the lens's performance in the VIS-NIR spectrum, ensuring optimal light transmission and reducing unwanted reflections.

The lens is currently in stock and available for immediate purchase. For more detailed information, please refer to the product's webpage at https://www.edmundoptics.com/p/75mm-dia-x-400mm-fl-vis-nir-inked-achromatic-lens/30855/.