Precision Flat Optical Mirror
Lambda/20 flatness mirror with protected gold coating for interferometer reference surfaces. Classified HTS 9001.90.60.00 as high precision unmounted optical mirror element.
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Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If optical instrument for inspection
Inspection/measuring mirrors classified in 9031.
If drawn/srolled glass sheets
Glass in sheet form not yet optical elements stays in Chapter 70.
If spectrometer dispersing elements
Parts principally for spectrometers classified with apparatus.
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Import Tips & Compliance
• Provide interferograms and surface flatness test data
• Specify coating environmental durability and cleanroom handling requirements
• Classify reference flats distinctly from common plate glass mirrors
Related Products under HTS 9001.90.60.00
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 HTS 9001.90.60.00 as an unmounted optical mirror element, not optically worked glass, used in precision optical systems for reflecting specific wavelengths.
Unmounted Concave Optical Mirror
A curved concave mirror with a polished aluminum coating on a glass substrate, used in telescopes and projectors. Classified under HTS 9001.90.60.00 as an unmounted mirror optical element for beam focusing in imaging systems.
Protected Aluminum Coated Mirror
An unmounted front-surface mirror with protected aluminum coating on a float glass substrate for high optical quality reflection. It qualifies under HTS 9001.90.60.00 as a precision optical mirror element used in spectroscopy and interferometry.
Unmounted Dichroic Beam Splitter Mirror
A thin-film dichroic mirror that reflects specific wavelengths while transmitting others, used in multi-spectral imaging. Falls under HTS 9001.90.60.00 as an unmounted optical mirror element for beam separation applications.
Fused Silica Ultraviolet Mirror
A mirror made from fused silica substrate with dielectric coatings optimized for UV wavelengths, used in lithography systems. Classified in HTS 9001.90.60.00 as an unmounted mirror for optical applications requiring high UV transmission.
Unmounted Right Angle Prism Mirror
A mirror coated on a right-angle prism surface for 90-degree beam deflection in periscopes and binoculars. Under HTS 9001.90.60.00 as an unmounted mirror element, distinguished from uncoated prisms.