Duochrome Test Slide Projector Optics from Germany
Red-green bichromatic optics balancing spherical refractive errors. HTS 9018.90.20.00 includes optical test projectors for sight-testing. Endpoint determination in subjective refraction.
Duty Rate — Germany → United States
10%
Rate breakdown
9903.03.0110%Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Import Tips
• Specify dominant wavelength values (red 625nm, green 535nm typical)
• Include projection lens focal length and screen illumination specs
• Classify as complete optical system vs. individual color filters