METHOD FOR MANUFACTURING ILLUMINANCE ADJUSTMENT FILTER, ILLUMINANCE ADJUSTMENT FILTER, LIGHTING OPTICAL SYSTEM, AND EXPOSURE DEVICE
This method for manufacturing an illuminance adjustment filter comprises steps of: measuring illuminance I(i) at an arbitrary point i (i is an integer) on an exposure surface with no optical filter (90) placed in an optical path EL; calculating the optical transmittance distribution for each cell (9...
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Format: | Patent |
Sprache: | eng ; fre ; jpn |
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