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Global Manufacturer of Innovative Ultra Precision Machining Solutions. Precitech A Global Manufacturer of innovative ultra precision machining systems for diamond turning, freeform precision machining, micro-grinding, micro-milling, milling and grinding of optical lenses, mold inserts, mirrors, glass press molding, machine and precision components

What is DIFFSYS?

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 is a Windows® program for the generation of optical surfaces on precision CNC machines, particularily diamond-turning machines

DIFFSYS outputs jobfiles in several ASCII formats, compatible with most commercial machines. The strengths of DIFFSYS lie in its:

  • • Ease of use & clear graphics
  • • Ability to accept design data in many different formats
  • • Comprehensive tool corrections, to ensure accurate machining
  • • Excellent technical support


DIFFSYS was first released in 2000, and has become a market leader, with sales worldwide. It is recognised and recommended by the leading manufacturers of ultra-precision machines.

What's new!

Download "DIFFSYS news #2" for the latest new features!

Here are some recent additions to DIFFSYS '3D':

The red region is a 3D off-axis asphere. The purple region is a transitional blend from the central 3D surface, to the outer '2D' edge segments.

Slow tool servos: Some surfaces can become very steep or mathematically 'illegal'. You now specify a 'cutoff', at which point DIFFSYS adds a curved corner and a flat at the edge.

Micro-lens arrays: aspheric, any diameter, spacing, and grid size.