Patent ID: 7440686
Filing Date: 2008-10-21
Classification: G02B,G03B,H04N

Abstract:
1. An anti-shake apparatus of a photographing apparatus, comprising: a movable unit that supports one of an imaging device and a hand-shake correcting lens, and that is movable in first and second directions, said first direction being perpendicular to an optical axis of a photographing optical system of said photographing apparatus, and said second direction being perpendicular to said optical axis and to said first direction, and that performs an anti-shake operation by moving in said first and second directions; a fixed unit that slidably supports said movable unit in both said first and second directions; and a calculation unit configured to calculate a first detected-position signal and a second detected-position signal; one of said movable unit and said fixed unit having first and second position-detecting elements configured for detecting a position of said movable unit in said first direction as a first location, in order to calculate said first detected-position signal, and having third and fourth position-detecting elements configured for detecting a position of said movable unit in said second direction as a second location, in order to calculate said second detected-position signal; another of said movable unit and said fixed unit having first and second members configured for detecting said first location, and having third and fourth members configured for detecting said second location; said first position-detecting element facing said first member in said second direction; said second position-detecting element facing said second member in said second direction; said third position-detecting element facing said third member in said first direction; said fourth position-detecting element facing said fourth member in said first direction; said calculation unit configured to calculate said first detected-position signal being calculated on the basis of an average of output values of said first and second position-detecting elements and to calculate said second detected-position signal on the basis of an average of output values of said third and fourth position-detecting elements.