Patent classifications
G
PHYSICS
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G02
OPTICS
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G02B
OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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1/00
Optical elements characterised by the material of which they are made; Optical coatings for optical elements
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G02B1/002
made of materials engineered to provide properties not available in nature, e.g. metamaterials
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G02B1/005
made of photonic crystals or photonic band gap materials
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