Patent ID: 7663733

Claim:
Method of illuminating at least two illumination points by substantially uniform predefined amounts of energy provided by at least one spatial light modulator, said at least one spatial light modulator comprising a plurality of light modulators, wherein the method comprising: transmitting the predefined amounts of energy to said at least two illumination points; and at least partly controlling the predefined amounts of energy by varying the number of said light modulators illuminating said at least two points wherein the illumination of at least two of the illumination points is obtained by predetermined light modulators that form a mask pattern, wherein at least one filter mask is established at least partly on the basis of an energy measurement of the light modulation layout, and wherein said at least one filter mask is changed over time, said changing of said filter mask being at least partly determined by speed of relative movement between said at least two illumination points and said at least one spatial light modulator.