Patent ID: 8325322

Claim:
An optical correction device, comprising: a first optical element having a first side and a second side opposite the first side; a second optical element having a side, the first side of the first optical element and the side of the second optical element defining a flow channel configured so that a cooling medium can flow therethrough; and thermal actuators configured to influence a temperature distribution in the optical correction device, wherein: (i) the thermal actuators comprise first and second heating arrays, the first heating array being disposed on the first optical element at an interface facing the flow channel, and the second heating array being disposed on the second optical element at an interface facing the flow channel; or (ii) the thermal actuators comprise a heating array disposed on the second side of the first optical element, and wherein the optical correction device has an inlet channel upstream of the first and second optical elements in a flow direction of the cooling medium, the inlet channel is configured to feed the flow of the cooling medium, and a length of the inlet channel is approximately 10 to 20 times a height of the flow channel.