A lens doublet designates a lens having three spherical surfaces. The radii of curvatures are specified by r11, r12, and r13 for the first lens, and r21, r22, and r23 for the second lens. In addition, a lens doublet is specified by two thicknesses: t1, t2 set to 2.1 and 7.5 mm. The circular aperture is set to 25.5 mm and the material is composed of SF5 and BK7 glass.
To change the lens positions along the line, drag the red locators. The blue locators rotate the objects. Use the sliders to change the radii of curvatures of the lenses.
This sample optics Demonstration was created using Optica 3, an application package available for Mathematica. It was created by selecting component elements and setting symbolic variables from the GUI popup menus. The variables that users select as symbolic become controllable with sliders and locators. See http://www.opticasoftware.com for details about additional ray-tracing products.