Equilateral Dispersion Prism from Japan
An equilateral prism typically made of flint glass used for dispersing white light into its spectral components in spectrophotometers and educational optics kits. Classified under HTS 9001.90.50.00 as an unmounted optical element specifically engineered for chromatic dispersion. Provides high dispersion for separating wavelengths 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%
Import Tips
• Provide dispersion curve data and Abbe number specifications to confirm classification as optical prism rather than common glass
• Label with material type (BK7, F2 flint glass) and coating specifications if applicable
• Include test reports verifying surface flatness and optical performance to prevent reclassification