Patent ID: 7771065
Filing Date: 2010-08-10
Classification: G02B,G03F

Abstract:
1. An optical unit comprising: a plate; an optical element; a deforming device, located between said plate and said optical element, for applying a deforming force to said optical element, asymmetrically changing a surface shape of said optical element, wherein said deforming device includes (i) a plurality of deforming poles for contacting a back surface of said optical element and (ii) actuators for linearly displacing said plurality of deforming poles between said plate and said optical element; and a support pole, which does not include an actuator, one end of said support pole being connected to said plate and the other end of said support pole being connected to a central portion of the back surface of said optical element, wherein said support pole rigidly fixes said optical element to said plate and prevents displacement of at least a portion of said optical element, in order to counter moments applied by the deforming force of said deforming device, wherein each of said plurality of deforming poles of said deforming device are located closer to a circumferential edge of said optical element than is said support pole.