Prisms
Lenses, prisms, mirrors and other optical elements, of any material, mounted, being parts of or fittings for instruments or apparatus, other than such elements of glass not optically worked; parts and accessories thereof: > Other: > Prisms
Duty Rate (from China)
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
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Products classified under HTS 9002.90.20.00
Mounted Right Angle Prism for Laser Alignment
A right-angle prism mounted in a precision holder, used as an optical component in laser alignment instruments to redirect light beams by 90 degrees. It falls under HTS 9002.90.20.00 as a mounted prism serving as a part for optical instruments. The mounting ensures compatibility with apparatus like surveying tools or interferometers.
Penta Prism Assembly for Surveying Theodolites
A roof penta prism mounted in an aluminum housing, essential for maintaining image orientation in surveying theodolites regardless of rotation. Classified under HTS 9002.90.20.00 as a mounted optical element for precision instruments. It deviates the line of sight by 90 degrees without inverting the image.
Dispersive Prism for Spectrometer Optics
Equilateral dispersive prism mounted in a spectrometer's optical train to separate wavelengths of light for spectral analysis. HTS 9002.90.20.00 applies as a mounted prism functioning as a key part of analytical instruments. Typically made from flint glass for high dispersion properties.
Porro Prism Pair for Binocular Optics
Pair of mounted Porro prisms that provide upright image in binocular telescopes by folding the optical path. Classified under HTS 9002.90.20.00 as essential mounted optical elements for binocular instruments. The mounting aligns precisely within the binocular housing.
Anamorphic Prism Pair for Laser Beam Shaping
Matched pair of mounted cylindrical prisms that reshape elliptical laser beams to circular profiles in diode laser systems. HTS 9002.90.20.00 classification as mounted prisms for laser optical instruments. AR coatings optimize transmission for high-power applications.
Dove Prism for Image Rotation in Microscopes
Mounted Dove prism used in microscope accessories to rotate field of view without changing focus. Falls under HTS 9002.90.20.00 as a mounted optical element for compound microscopes. Provides continuous 360-degree image rotation capability.
Wollaston Prism for Polarizing Microscopes
Birefringent Wollaston prism mounted for interference microscopy to split polarized light into orthogonal beams. HTS 9002.90.20.00 as specialized mounted prism for petrographic microscopes. Creates shear interference patterns for material stress analysis.
Rhomboid Prism for Periscopes
Mounted rhomboid prism that displaces line of sight laterally in periscope optical systems. Classified HTS 9002.90.20.00 as mounted prism for navigational instruments. Maintains image orientation while offsetting optical axis.
Amici Roof Prism for Telescopes
Mounted Amici roof prism providing erecting function in spotting scope and telescope eyepieces. HTS 9002.90.20.00 as mounted optical element for astronomical instruments. Compact design folds optical path efficiently.
Corner Cube Prism for Retroreflectors
Triple mirror corner cube prism mounted for survey targets and retroreflector applications in laser ranging. Classified under HTS 9002.90.20.00 as mounted prism returning light parallel to incidence. Used in GPS receivers and distance measuring.