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Patent classifications
G
PHYSICS
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G02
OPTICS
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G02B
OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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17/00
Systems with reflecting surfaces, with or without refracting elements
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G02B17/08
Catadioptric systems
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G02B17/0884
having a pupil corrector
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G02B17/0888
the corrector having at least one aspheric surface, e.g. Schmidt plates
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