Patent classifications
G
PHYSICS
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G02
OPTICS
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G02B
OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
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27/00
Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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G02B27/0025
for optical correction, e.g. distorsion, aberration
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G02B27/005
for correction of secondary colour or higher-order chromatic aberrations
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G02B27/0062
by controlling the dispersion of a lens material, e.g. adapting the relative partial dispersion
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