Position-detecting apparatus

An anti-shake apparatus of a photographing apparatus, comprising:

• a movable unit that has one of an imaging device and a hand-shake correcting lens, and that can be moved in first and second directions, said first direction being perpendicular to an optical axis of a photographing lens of said photographing apparatus, and said second direction being perpendicular to said optical axis and said first direction;
• and
• a fixed unit that slidably supports said movable unit in both said first and second directions;
• one of said movable unit and said fixed unit having a magnetic-field change-detecting unit which has a horizontal magnetic-field change-detecting element for detecting a first location in said first direction of said movable unit, and a vertical magnetic-field change-detecting element for detecting a second location in said second direction of said movable unit;
• another of said movable unit and said fixed unit having a position-detecting magnet unit which is used for detecting said first and second locations, and which faces said magnetic-field change-detecting unit, and which has first and second horizontal position-detecting magnets and first and second vertical position-detecting magnets;
• the N pole and S pole of said first horizontal position-detecting magnet being arranged in a third direction which is parallel to said optical axis and is perpendicular to said first and second directions;
• the N pole and S pole of said second horizontal position-detecting magnet being arranged in said third direction;
• the polarities of said first and second horizontal position-detecting magnets being arranged in opposite directions, in said third direction;
• said N pole of said first horizontal position-detecting magnet and said S pole of said second horizontal position-detecting magnet being separated in said first direction by a first distance, and facing said horizontal magnetic-field change-detecting element;
• said first and second horizontal position-detecting magnets being used for detecting said first location;
• the N pole and S pole of said first vertical position-detecting magnet being arranged in said third direction;
• the N pole and S pole of said second vertical position-detecting magnet being arranged in said third direction;
• the polarities of said first and second vertical position-detecting magnets being arranged in opposite directions, in said third direction;
• said N pole of said first vertical position-detecting magnet and said S pole of said second vertical position-detecting magnet being separated in said second direction by a second distance, and facing said vertical magnetic-field change-detecting element;
• and
• said first and second vertical position-detecting magnets being used for detecting said second location.