Patent classifications
G
PHYSICS
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G02
OPTICS
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G02B
OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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19/00
Condensers,; e.g. light collectors or similar non-imaging optics
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G02B19/0004
characterised by the optical means employed
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G02B19/0028
refractive and reflective surfaces, e.g. non-imaging catadioptric systems
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