67-335-INK 25 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=750mm VIS-NIR 400-1000nm

The 67-335-INK is a high-quality achromatic doublet lens, sourced from the renowned optical component vendor, Edmund Optics. This lens, with a diameter of 25 mm, is designed for use in the visible to near-infrared spectrum, spanning 400-1000nm. The lens is specifically engineered to minimize chromatic aberration, ensuring clear, focused images across the entire spectral range.

The lens features a focal length of 750mm, indicated by the EFL (Effective Focal Length) parameter. This long focal length makes it suitable for applications requiring high magnification or narrow fields of view. The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott, ensuring high optical quality and durability.

The geometry of the lens is carefully designed, with a thickness of 4.75mm at the edge and 2.5mm at the center. The lens's inner and outer radii are 0, suggesting a simple, circular shape. The front and back surfaces of the lens are coated with EDm VIS-NIR 0SP2002000, a broadband anti-reflection coating that enhances transmission and reduces surface reflections.

This lens is available for purchase directly from the Edmund Optics website, as indicated by the "weblink status" field in the item data. With its high-quality construction, broad spectral range, and long focal length, the 67-335-INK is a versatile and reliable choice for a wide range of optical applications.