Silicon Aspheric Lens from Japan
Precision aspheric lens molded from optical-grade silicon for mid-IR applications like FTIR spectrometers. Under HTS 9001.90.90.00 as unmounted non-glass optical element with complex surface for aberration correction. Used in analytical instruments.
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
• Provide surface figure specs (λ/4 PV) and MTF data confirming aspheric optical design
• Distinguish from silicon wafers via diameter-to-thickness ratios typical of optics
• Diamond-turned surfaces must be documented as optical working, not mechanical