Diamond Turning Optical Blank from Canada
Precision-ground optical blank of germanium or ZnS prepared for single-point diamond turning into aspheres. HTS 9001.90.90.00 as unmounted optical substrate. Used in prototype IR optics manufacturing.
Duty Rate — Canada → United States
10%
Rate breakdown
9903.05.2910%Except for products described in headings 9903.05.85–9903.05.93, articles the product of Canada, as provided for in U.S. note 52 to this subchapter
Import Tips
• Surface roughness (rms <50nm) and figure error specs pre-turning
• Material certificates trace to optical-grade melts
• Prototype status may qualify duty relief programs