ECCN
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2B002
2B002 Numerically controlled optical finishing machine tools equipped for selective material removal to produce non-spherical optical surfaces having all of the following characteristics (See List of Items Controlled).
- Category
- Category 2—Materials Processing
- Product group
- B. “Test”, “Inspection” and “Production Equipment”
Reason for Control
- NS
- AT
Official text
License Requirements
Reason for Control:
NS, AT
Control(s) Country Chart (See Supp. No. 1 to part 738)
- NS applies to entire entry NS Column 2
- AT applies to entire entry AT Column 1
List Based License Exceptions (See Part 740 for a description of all license exceptions)
LVS: N/A
GBS: N/A
List of Items Controlled
Related Controls: See also 2B001.
Related Definitions: For the purposes of 2B002, ‘MRF’ is a material removal process using an abrasive magnetic fluid whose viscosity is controlled by a magnetic field. ‘ERF’ is a removal process using an abrasive fluid whose viscosity is controlled by an electric field. ‘Energetic particle beam finishing’ uses Reactive Atom Plasmas (RAP) or ion-beams to selectively remove material. ‘Inflatable membrane tool finishing’ is a process that uses a pressurized membrane that deforms to contact the workpiece over a small area.'Fluid jet finishing’ makes use of a fluid stream for material removal.
Items: 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:
d.1. ‘Magnetorheological finishing (MRF)’;
d.2. ‘Electrorheological finishing (ERF)’;
d.3. ‘Energetic particle beam finishing’;
d.4. ‘Inflatable membrane tool finishing’; or
d.5. ‘Fluid jet finishing’.
ecfr-15cfr774-supp1-2026-08-28 · effective 2026-08-28
Issue date 2026-08-28. Amendment date 2026-08-28.
- eCFR Commerce Control List (15 CFR 774, Supplement No. 1)www.ecfr.gov
- eCFR versioner XML captured at ingestwww.ecfr.gov
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