33-920 30 mm Dia. N-BAF10/N-SF57 Achromatic Doublet; EFL=40mm VIS 0° 425-675nm

The 33-920 is a high-quality achromatic doublet lens, boasting a 30 mm diameter and an effective focal length (EFL) of 40 mm, specifically designed for the visible light spectrum ranging from 425 to 675 nm. This lens is sourced from the renowned optical vendor, Edmund Optics, and is available for purchase through their official website.

The lens is constructed from two types of Schott glass: N-BAF10 and N-SF57. 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. By combining these materials, the 33-920 achieves superior image quality and color correction.

The lens geometry is meticulously designed, with a diameter of 30 mm, a thickness at the edge of 9.87 mm, and a center thickness of 10.9 mm. The radii of the lens surfaces are R1 = 25.62 mm, R2 = -25.62 mm, and R3 = -144.37 mm. These specifications contribute to the lens's excellent optical performance.

The 33-920 is coated with the EDM VIS-0 standard curve on both the front and back surfaces. This coating enhances the lens's light transmission capabilities and provides protection against environmental factors, ensuring the longevity of the lens.