Other
Optical fibres and optical fibre bundles; optical fibre cables other than those of heading 85.44; sheets and plates of polarizing material; lenses (including contact lenses), prisms, mirrors and other optical elements, of any material, unmounted, other than such elements of glass not optically worked. > Other
Duty Rate (from China)
Products classified under Tariff item 9001.90.00
Abbe-Koenig Prism
An Abbe-Koenig prism is a Porro-type prism with air-spaced roof surfaces that provides total internal reflection while maintaining high light transmission. It is an unmounted optical prism used in high-performance binoculars and other precision optical instruments. This product falls under tariff item 9001.90.00 as an unmounted optical element of any material.
Amici Roof Prism
An Amici roof prism is a compound prism that combines right-angle reflection with roof prism functionality to erect images in compact optical instruments. It is an unmounted optical prism featuring both total internal reflection and image erecting properties. This product falls under tariff item 9001.90.00 as an unmounted optical element.
Anamorphic Prism Pair
An anamorphic prism pair consists of matched wedge prisms used to circularize elliptical laser beams by expanding or compressing the beam in orthogonal directions. These are unmounted individual prisms commonly used in laser diode systems. This product falls under tariff item 9001.90.00 as unmounted optical prisms.
Brewster Prism
A Brewster prism is cut at Brewster's angle to minimize reflection losses for p-polarized light, making it ideal for laser cavities. It is an unmounted dispersion prism optimized for specific polarization states. This product falls under tariff item 9001.90.00 as an unmounted optical prism.
Calcium Fluoride Unmounted Lens
An unmounted calcium fluoride lens for excimer lasers and spectroscopy, offering excellent UV transmission down to 130nm. It is an unmounted optical element of crystalline material, falling under tariff item 9001.90.00.
Corner Cube Prism
A corner cube prism is a solid glass prism with three mutually perpendicular faces that retroreflects incident light parallel to itself regardless of the angle of incidence. It is an unmounted optical prism used in surveying, alignment, and laser applications. This product falls under tariff item 9001.90.00 as an unmounted optical element.
Dove Prism
A Dove prism is used for image rotation in optical systems, featuring a 45-degree cut angle and total internal reflection on elongated faces. It is an unmounted optical prism for precision image manipulation. This product falls under tariff item 9001.90.00 as an unmounted optical prism.
Equilateral Dispersion Prism
An equilateral dispersion prism, typically made of flint glass, disperses white light into its spectral components for use in spectrophotometers and educational optics kits. It is an unmounted optical prism designed for spectral analysis. This product falls under tariff item 9001.90.00 as an unmounted optical element.
Fresnel Rhomb Prism
A Fresnel rhomb prism is a 45-90-45 degree prism that uses total internal reflections to convert linear polarization to circular polarization. It is an unmounted optical element for polarization state control in laser systems. This product falls under tariff item 9001.90.00 as an unmounted optical prism.
Fused Silica Ultraviolet Mirror
A fused silica substrate mirror with dielectric coatings optimized for ultraviolet wavelengths, used in lithography systems. It is an unmounted optical element, not incorporated into a larger assembly, and therefore falls under tariff item 9001.90.00 for other optical elements of any material.
Fused Silica Unmounted Lens
An unmounted fused silica lens for UV applications in lithography and spectroscopy, optically polished and free of mounting. It is an unmounted optical element of high-purity silica, qualifying under tariff item 9001.90.00.
Germanium Unmounted IR Lens
An unmounted germanium lens for thermal imaging cameras operating in the mid-IR spectrum, with an AR coating for 3-5 micron transmission. It is an unmounted optical element of semiconductor material, falling under tariff item 9001.90.00.
Glued Doublet Prism
A glued doublet prism consists of two prisms of different dispersion glasses cemented together to form an achromatic prism with reduced chromatic aberration. It is an unmounted compound optical prism for spectroscopy applications. This product falls under tariff item 9001.90.00 as an unmounted optical element.
High Power Laser Turning Mirror
A water-cooled copper substrate mirror with dielectric coatings for high-power CO2 lasers, used to direct beams in industrial cutting systems. As an unmounted optical mirror, it is classified under tariff item 9001.90.00 for other optical elements.
Metallic Coated Sapphire Mirror
A sapphire substrate mirror with gold coating for infrared applications in thermal imaging systems. This unmounted optical mirror is classified under tariff item 9001.90.00 as an optical element of any material.
Multilayer Dielectric Mirror
A high-reflectivity multilayer dielectric mirror stack for femtosecond laser pulse compression, used in ultrafast optics. As an unmounted optical element, it is classified under tariff item 9001.90.00.
Penta Prism
A penta prism made of N-BK7 glass deviates an incident beam by exactly 90 degrees regardless of prism orientation, used in viewfinders and precision alignment systems. It is an unmounted optical prism. This product falls under tariff item 9001.90.00 as an unmounted optical element.
Polycarbonate Unmounted Contact Lens Blank
A pre-formed contact lens blank of gas-permeable polycarbonate, awaiting final surfacing. It is an unmounted, unfinished optical element for contact lenses, falling under tariff item 9001.90.00.
Porro Prism
A Porro prism is a pair of right-angle prisms arranged to invert and revert images in binoculars, providing upright viewing with a wide field of view. When imported unmounted as individual optical elements, it falls under tariff item 9001.90.00. This product is an unmounted optical prism.
Precision Flat Optical Mirror
A lambda/20 flatness mirror with protected gold coating for interferometer reference surfaces. This high-precision unmounted optical mirror is classified under tariff item 9001.90.00.
Protected Aluminum Coated Mirror
An unmounted front-surface mirror with protected aluminum coating on a float glass substrate for high optical quality reflection. It is classified under tariff item 9001.90.00 as an unmounted optical mirror element used in spectroscopy.
Right Angle Prism
A right angle prism made of optical glass with polished surfaces redirects light beams by 90 degrees through total internal reflection. It is an unmounted optical prism designed for beam bending in various optical systems. This product falls under tariff item 9001.90.00 as an unmounted optical element.
Roof Pentagon Prism
A roof pentagon prism is a compact five-sided prism that combines 90-degree deviation with image erection for ultra-compact optical systems. It is an unmounted optical prism featuring both roof and total internal reflection surfaces. This product falls under tariff item 9001.90.00 as an unmounted optical element.
Sapphire Unmounted Lens
An unmounted synthetic sapphire lens for harsh environments in military optics and wear-resistant scanners. It is an unmounted optical element of alumina, falling under tariff item 9001.90.00.
Schlieren Prism
A Schlieren prism is a high-precision wedge prism used in schlieren imaging systems to visualize density gradients in fluids and shock waves. It is an unmounted optical prism with exact wedge angle control. This product falls under tariff item 9001.90.00 as an unmounted optical element.
Schottky Detector Cold Mirror
A cold mirror separating visible from infrared radiation for thermal detector systems, designed for spectral separation. This unmounted optical mirror is classified under tariff item 9001.90.00.
Silicon Unmounted Lens
An unmounted hyper-hemispherical silicon lens for THz/mm-wave imaging, transmitting 0.1-2THz. It is an unmounted optical element of semiconductor material, falling under tariff item 9001.90.00.
Unmounted Achromatic Doublet Lens
An unmounted achromatic doublet lens, consisting of a crown-flint glass pair cemented together to correct chromatic aberration in optical instruments such as microscopes. It is not mounted in a cell or frame, qualifying as an unmounted optical element under tariff item 9001.90.00.
Unmounted Aspheric Polymer Lens
An unmounted aspheric polymer lens molded from optical-grade acrylic, used to minimize spherical aberration in cameras and projectors. It is an unmounted optical element of plastic material, not glass, falling under tariff item 9001.90.00.
Unmounted Ball Lens
An unmounted spherical ball lens made of sapphire or glass, used for fiber optic collimation and endoscopy. It is an unmounted optical element of any material, qualifying under tariff item 9001.90.00.
Unmounted Concave Optical Mirror
A curved concave mirror with a polished aluminum coating on a glass substrate, used in telescopes and projectors. As an unmounted mirror optical element for beam focusing, it is classified under tariff item 9001.90.00.
Unmounted Cylindrical Polymer Lens
An unmounted cylindrical polymer lens made of optical polycarbonate, used for line scanning in barcode readers and laser printers. It focuses light into a line rather than a point, qualifying as an unmounted optical element under tariff item 9001.90.00.
Unmounted Dichroic Beam Splitter Mirror
A thin-film dichroic mirror that reflects specific wavelengths while transmitting others, used in multi-spectral imaging. This unmounted optical mirror element for beam separation is classified under tariff item 9001.90.00.
Unmounted Dielectric Laser Mirror
A high-reflectivity dielectric mirror made from multiple thin-film layers on a fused silica substrate, designed for laser applications. It falls under tariff item 9001.90.00 as an unmounted optical mirror element, not optically worked glass.
Unmounted Double-Convex BK7 Lens
An unmounted double-convex lens made from BK7 borosilicate crown glass, used in telescopes and microscopes. It is an optically worked glass lens, not excluded by chapter notes, and falls under tariff item 9001.90.00.
Unmounted Fresnel Polymer Lens
An unmounted Fresnel polymer lens made of PMMA, used for overhead projectors and solar concentrators. It features concentric grooves and is an unmounted optical element of plastic, falling under tariff item 9001.90.00.
Unmounted Plano-Convex Glass Lens
An unmounted plano-convex glass lens with one flat and one curved surface, designed for focusing light in optical instruments. It is an optically worked glass lens, unmounted, and falls under tariff item 9001.90.00.
Unmounted Powell Lens
An unmounted Powell lens of polymer construction, used to create a uniform line from a Gaussian laser beam for machine vision. It is a specialty unmounted optical element, falling under tariff item 9001.90.00.
Wollaston Prism
A Wollaston prism is a birefringent prism composed of two calcite prisms cemented together to separate orthogonally polarized light beams. It is an unmounted optical prism for polarization applications in microscopy and other optical systems. This product falls under tariff item 9001.90.00 as an unmounted optical element.
Zinc Selenide Unmounted Lens
An unmounted zinc selenide lens for CO2 lasers and FTIR spectrometers, transmitting 0.6-20μm. It is an unmounted optical element of compound semiconductor material, falling under tariff item 9001.90.00.