47-667-INK 12.5 mm Dia. N-BK7/N-SF5 Achromatic Doublet; EFL=50mm VIS 0° 425-675nm

The 47-667-INK is a high-quality achromatic doublet lens, sourced from the renowned optical component vendor, Edmund Optics. This lens, with a diameter of 12.5 mm, is designed for use in the visible light spectrum, specifically between 425 and 675 nanometers. The lens boasts an effective focal length (EFL) of 50mm, making it suitable for a wide range of optical applications.

The lens is constructed from two types of glass, N-BK7 and N-SF5, both from Schott. This combination is used to correct chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The use of these materials ensures that the lens provides clear, sharp images across the entire visible light spectrum.

The lens geometry is carefully designed, with a central thickness of 3.5 mm and edge thickness of 4.06 mm. The radii of curvature for the three surfaces are 30.73 mm, -22.32 mm, and -64.75 mm, respectively. These parameters are crucial in determining the lens's performance and are carefully optimized by Edmund Optics to ensure the best possible image quality.

The lens is coated with the EDM VIS-0 STD curve on both the front and back surfaces. This coating is designed to enhance the lens's transmission in the visible light spectrum, further improving its performance in its intended application.