Silicon Aspheric Lens from Mexico
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 — Mexico → United States
10%
Rate breakdown
9903.05.5510%Section 301 (forced labor) — additional 10% ad valorem on products of Mexico
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