Surface data

Surface data

Surface data include the usual lens prescription items such as radii of curvature, thicknesses, glasses, aspheric constants, etc. Surfaces are numbered, starting with 0 for the object surface. In a normal, sequential lens, the surface numbers increase monotonically in the order that rays strike them. OSLO PRO can also handle multiconfiguration systems in which groups of surfaces are skipped in different configurations. OSLO SIX can also handle lens arrays and non-sequential groups in which rays do not progress through a sequence of surfaces having increasing numbers.

There are four ways to enter and modify surface data. The first, and most commonly used, is the Surface data spreadsheet, which can be invoked from the Update menu, or from the F5 toolbar icon. The second is called global editing, in which the data item, surface number, and value are entered on the command line. The third is the internal lens editor, in which the program enters a mode that accepts data for a particular surface. Finally, surface data can be entered as a text file prepared "off-line" using any editor. Although the spreadsheet is very convenient for typical design sessions, the other methods each have a raison d’etre.

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