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

The 88-594 is a high-quality achromatic doublet lens, boasting a 75 mm diameter and an effective focal length (EFL) of 300 mm, specifically designed for the visible light spectrum ranging from 425 to 675 nm. This lens is sourced from the reputable optical vendor, Edmund Optics, and is available for purchase through their official website.

The lens is constructed from two types of Schott glass: N-BK7 and N-SF5. These materials are carefully selected to minimize chromatic aberration, a common issue in lenses where different wavelengths of light are focused at different points. By combining these materials, the 88-594 achieves superior image quality and color correction.

The lens geometry is meticulously designed, with an inner radius of 0 mm and an outer radius of 0 mm. The edge thickness measures 13.97 mm, while the center thickness is 13.59 mm with an additional 6 mm of material on the center a side. The lens's curvature is defined by radii of 184.05 mm and -137.34 mm for the first and second surfaces, respectively, and -399.33 mm for the third surface.

The 88-594 is equipped with standard ED coating on both the front and back surfaces, identified as 'edm vis-0 std curve'. This coating enhances the lens's light transmission capabilities and reduces surface reflections, further improving image quality.