Patent ID: 7728955

Claim:
A lithographic apparatus, comprising: a radiation beam divider configured to divide a pulsed beam of radiation into at least first and second pulsed sub-beams of radiation; at least one sensor, configured to determine a radiation dose of a pulse of radiation in the pulsed beam of radiation or at least one of the pulsed first and second sub-beams of radiation; an optical delay component, configured to delay a pulse of radiation after the radiation dose of the pulse of radiation has been determined by said at least one sensor; a first modulator, configured to adjust a radiation dose of a pulse of radiation in said first pulsed sub-beam of radiation based on the radiation dose determined by the at least one sensor; a second modulator, configured to adjust a radiation dose of a pulse of radiation in said second pulsed sub-beam of radiation based on the radiation dose determined by said at least one sensor; and one or more radiation sinks, configured to absorb excess radiation directed from at least one of the first or second modulator.