Achromatic doublet lenses 06 September, 2021
06 Sep 2021
The near-axial aberrations such as spherical aberration, coma aberration, and chromatic aberration are well corrected by computer optimization design. When used to focus the collimation, the surface of a convex lens or small radius of curvature is usually oriented toward the collimation light. When used for imaging, a convex lens must be oriented toward the side with the object or image at a longer distance. In the design, the different values of dispersion and lens shape were optimized to achieve the minimum chromatic aberration at the three wavelengths of blue (486.1nm), green (546.1nm), and red (656.3nm). Thus, such a lens can be used throughout the visible light region.