DIFFSYS A: Aspheres only
This is the entry-level version for spheres, aspheres, and multi-
segment aspheres; with comprehensive diamond tool corrections,
lead-in / out codes, sag tables, resize, B-axis, inch/mm, and various
jobfile formats. You can add further options later on as required.
DIFFSYS AZ: Aspheres + Zones (Diffractives, Fresnels)
Same specification as above, plus diffractives and fresnels. DIFFSYS has become the industry standard for machining zoned surfaces.
DIFFSYS A3: Aspheres + 3D Surfaces Generates ultra-precision off-axis
aspheres, atorics, acylinders, and freeforms, either by raster flycutting or 'slow/fast-tool-servo'. Lots of features and options. This version also includes the 2D Aspheres-only functions.
DIFFSYS AZ3: Aspheres, Zones, 3D
All of the above.