Unmounted Plano-Convex Glass Lens
A plano-convex lens made of optical glass with one flat and one curved surface, designed for focusing light in optical instruments. It falls under HTS 9001.90.40.00 as an unmounted optical lens, other than glass not optically worked, used in lasers and projectors. The lens is precision-ground but not mounted in a frame or housing.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If glass not optically worked
Chapter note excludes glass lenses not optically worked, classifying them as sheets/plates of polarizing material or similar under 7014.
If mounted in frames or settings
Mounted lenses for spectacles or similar are classified under heading 9002, not unmounted elements.
If specially designed for specific optical machines
Parts suitable solely for particular optical instruments of Chapter 90 may classify under those headings per note 2.
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Import Tips & Compliance
• Provide detailed optical specifications and material composition certificates to verify classification under 9001.90.40.00
• Avoid common pitfalls by ensuring lenses are truly unmounted; assembled units may shift to Chapter 90 finished instruments
• Comply with FDA regulations if lenses are for medical devices, even if imported as components
Related Products under HTS 9001.90.40.00
Unmounted Powell Lens
Asymmetric Powell lens creating uniform line from Gaussian laser beam for machine vision. Polymer construction, HTS 9001.90.40.00 unmounted specialty lens. Fan angle determines line length.
Silicon Unmounted Lens
Hyper-hemispherical silicon lens for THz/mm-wave imaging, 0.1-2THz transmission. HTS 9001.90.40.00 unmounted semiconductor lens. AR-coated for reduced reflection.
Unmounted Aspheric Polymer Lens
An aspheric lens molded from optical-grade polymer (acrylic), used to minimize spherical aberration in cameras and projectors. Classified under HTS 9001.90.40.00 as an unmounted lens of plastic material, excluding unworked glass. Its non-spherical surface requires precise molding for optical performance.
Fused Silica Unmounted Lens
A high-purity fused silica lens for UV applications in lithography and spectroscopy, unmounted and optically polished. It qualifies under HTS 9001.90.40.00 as an 'other' optical lens material, distinct from unworked glass per chapter exclusions. Ideal for high-transmission in deep UV wavelengths.
Unmounted Double-Convex BK7 Lens
A precision double-convex lens made from BK7 borosilicate crown glass, used in telescopes and microscopes. Falls under HTS 9001.90.40.00 as an unmounted, optically worked glass lens not excluded by chapter notes. Provides symmetrical focusing for imaging systems.
Sapphire Unmounted Lens
A synthetic sapphire (alumina) lens for harsh environments in military optics and wear-resistant scanners. Classified in HTS 9001.90.40.00 as an unmounted optical element of 'any material' other than excluded glass. Offers extreme hardness and scratch resistance.