Reflector with passive and active temperature comp

专利名称：Reflector with passive and active

temperature compensation

发明人：Sasaki, Aki, c/o Mitsubishi Denki K.K.,Mikami,

Izumi, c/o Mitsubishi Denki K.K.

申请号：EP91113659.6申请日：19910814公开号：EP0471362B1公开日：19961113

摘要：Described herein is a reflector (3) which is formed of three or more of reflectormodules (called stacks (2) hereinafter) arranged in arrays and bonded to each other thestacks (2) being arranged to average the distribution of thermal deformations thereof interms of inhomogeneity among the stacks (2) in average coefficient of linear expansion,thereby suppressing deformation and deterioration of image-forming performancequality of the reflector (3) under varying temperature conditions. Since the stacks (2) arearranged in order of the magnitude of values of average coefficients of linear expansionpossessed by the stacks (2) so that a thermal deformation pattern produced is arelatively simple pattern, there is provided a reflector device in which correction ofthermal deformation can be made by a few actuators. In such a reflector device acorrecting force is automatically calculated from a difference between a temperature ofa reflector (3) and a reference temperature to drive an actuator (5) whereby an excellentimage forming performance with respect to the change in temperature can be

maintained. Therein, a surface deformation of a temperature (3) is developed into modesto automatically select modes so that a residual deformation is less a predesignated

deformation amount, and after correction thereof, the deformation is corrected wherebythe correction can be made efficiently with a small force.

申请人：MITSUBISHI ELECTRIC CORP

地址：JP

国籍：JP

代理机构：Sajda, Wolf E., Dipl.-Phys.

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