9001.90.90.00/Silicon Aspheric Lens/Japan

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%Section 301 (forced labor) — Japan (col1 rate < 12.5 percent): MFN < 12.5% → total duty capped at 12.5%

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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