Fused Silica Plano-Convex Lens
A high-precision plano-convex lens made from fused silica, used in laser systems and optical instruments for focusing light. It falls under HTS 9001.90.90.00 as an unmounted optical element of a material other than unworked glass, designed for precise beam manipulation. The lens is supplied individually without mounting for integration into various optical assemblies.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If made of optically worked glass
Glass optical elements, even if worked, fall under 9001.20, while non-glass materials like fused silica go to 'other' subheadings.
If mounted for use in instruments
Unmounted elements are 9001; once mounted as filters or objectives, they classify under 9002 as assembled optical components.
If basic glass spheres or prisms not for optical use
Plain glass articles like spheres go to Chapter 70; only those specifically for optical applications move to Chapter 90.
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Import Tips & Compliance
• Verify optical material specifications and provide test certificates confirming fused silica composition to avoid misclassification as glass elements
• Ensure documentation includes proof of unmounted status; mounted lenses may shift to Chapter 90 optical instruments
• Check for anti-dumping duties on certain silica products and maintain supply chain records for origin verification
Related Products under HTS 9001.90.90.00
Sapphire Prism
A right-angle prism crafted from synthetic sapphire (aluminum oxide), ideal for UV and harsh environment optics in spectroscopy and defense applications. Classified under HTS 9001.90.90.00 as an unmounted optical element of non-glass material, prized for its hardness and transmission properties. Delivered unmounted for custom system integration.
Polymer Optical Fiber Bundle
A bundle of polymer optical fibers used for illumination and image transmission in endoscopes and sensors. It qualifies under HTS 9001.90.90.00 as optical fiber bundles distinct from electrical cables of 8544, unmounted for device assembly. Essential for medical and industrial imaging applications.
Calcium Fluoride Window
An unmounted flat optical window made of calcium fluoride (CaF2) for infrared spectroscopy and laser systems. Falls under HTS 9001.90.90.00 as a non-glass optical element transmitting in UV-IR spectrum. Used unprotected in optical paths requiring high purity.
Polarizing Film Sheet
Sheets of polarizing material, typically PVA with iodine crystals, used in LCD displays and sunglasses. Classified in HTS 9001.90.90.00 as plates of polarizing material, unmounted for lamination into devices. Controls light polarization in optical systems.
Germanium Meniscus Lens
A meniscus lens made from germanium crystal for thermal imaging and CO2 laser optics in the 8-14μm IR range. HTS 9001.90.90.00 covers this unmounted semiconductor optical element. Critical for night vision and FLIR systems.
Silicon Aspheric Lens
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.