49-292-INK 50 mm Dia. N-BAF10/N-SF10 Achromatic Doublet; EFL=75mm VIS 0° 425-675nm

The 49-292-INK is a high-quality achromatic doublet lens, sourced from the renowned optical vendor, Edmund Optics. This lens, with a diameter of 50 mm, is designed for use within the visible light spectrum, specifically between 425-675 nm. The lens boasts an effective focal length (EFL) of 75 mm, making it suitable for a wide range of optical applications.

The lens is composed of two types of glass, N-BAF10 and N-SF10, both from Schott. These materials are carefully selected to minimize chromatic aberration, a common issue in optical systems where different wavelengths of light are focused at different points. The achromatic design ensures that the lens focuses both red and blue light to the same point, providing sharper images and more accurate color reproduction.

The lens geometry is meticulously designed, with a central thickness of 20 mm and an edge thickness of 17.07 mm. The lens features three radii of curvature: r1 at 51.88 mm, r2 at -32.79 mm, and r3 at -309.45 mm. These parameters contribute to the lens's overall optical performance, influencing factors such as field of view, distortion, and image quality.

The lens is coated with the EDM VIS-0 standard curve on both the front and back surfaces. This coating enhances the lens's transmission and reduces reflection, thereby improving light transmission and image quality. The coating is specifically designed for use within the visible light spectrum, further optimizing the lens's performance for its intended application.