Optical Flatness Tester from Japan
Interferometric instrument measuring surface flatness of precision optical components and gauge blocks. Precision optical measuring instrument under HTS 9031.49.9000 for gauge and optical manufacturing.
Duty Rate — Japan → United States
12.5%
Rate breakdown
9903.05.4912.5%Except for products described in headings 9903.05.85–9903.05.92, articles the product of Japan, with an ad valorem (or ad valorem equivalent) rate of duty under column 1 less than 12.5 percent, as provided for in U.S. note 52 to this subchapter
Import Tips
• Specify fringe interpretation method (Fizeau/Twyman-Green) and wavelength stability
• Include test plate material (fused silica/zerodur) and flatness specification
• Provide helium-neon laser stabilization documentation if applicable