# Council Regulation (EC) No 428/2009 of 5 May 2009 setting up a Community regime for the control of exports, transfer, brokering and transit of dual-use items (Recast), Division [2B002]: Numerically controlled optical finishing machine tools equipped for selective material removal to produce non-spherical optical surfaces having all of the following characteristics:

Extent: E+W+S+N.I.

a..Finishing the form to less (better) than 1,0 μm;
b..Finishing to a roughness less (better) than 100 nm rms.
c..Four or more axes which can be coordinated simultaneously for "contouring control"; and
d..Using any of the following processes:
1..‘Magnetorheological finishing’ (‘MRF’);
2..‘Electrorheological finishing’ (‘ERF’);
3..‘Energetic particle beam finishing’;
4..‘Inflatable membrane tool finishing’; or
5..‘Fluid jet finishing’.
Technical Notes:For the purposes of 2B002:
1.
‘MRF’ is a material removal process using an abrasive magnetic fluid whose viscosity is controlled by a magnetic field.
2.
‘ERF’ is a removal process using an abrasive fluid whose viscosity is controlled by an electric field.
3.
‘Energetic particle beam finishing’ uses Reactive Atom Plasmas (RAP) or ion-beams to selectively remove material.
4.
‘Inflatable membrane tool finishing’ is a process that uses a pressurized membrane that deforms to contact the workpiece over a small area.
5.
‘Fluid jet finishing’ makes use of a fluid stream for material removal.

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Source: https://www.legislation.gov.uk/eur/2009/428/annex/I/division/4/division/2/division/2B002 (the official version)
Page: https://openlegislation.uk/eu-regulation-2009-428/annex-I/division-4/division-2/division-2B002
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.