88-594-INK 75 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=300mm VIS 0° 425-675nm

The 88-594-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens boasts a 75 mm diameter and an effective focal length (EFL) of 300 mm, specifically designed for the visible light spectrum, spanning 425-675 nm.

The lens is meticulously crafted from two types of Schott glass, N-BK7 and N-SF5, which are renowned for their exceptional optical properties. The achromatic design ensures minimal chromatic aberration, a common issue in lens systems where different wavelengths of light are focused at different points. This lens effectively mitigates this problem, providing clear, focused images across the entire visible spectrum.

The lens features a standard curvature coating on both the front and back surfaces, specifically the EDM VIS-0 STD curve. This coating enhances the lens's durability and resistance to environmental factors, while also reducing surface reflections and improving light transmission.

The lens geometry is intricately designed, with a center thickness of 13.59 mm and edge thickness of 13.97 mm. The lens's design includes three radii: r1 at 184.05 mm, r2 at -137.34 mm, and r3 at -399.33 mm. These parameters contribute to the lens's overall performance and optical quality.