Lens barrel, camera and lens barrel adjustment device

Abstract

A lens barrel comprises a fixed optical system though which a subject image enters into the lens barrel along with an optical axis, a retreatable blur correction optical system that corrects an image blur by moving within a plane ranging perpendicular to the optical axis in an operating position and that retreats to a storage position from the operating position, a blur correction optical system drive unit that drives the retreatsble blur correction optical system within the plane ranging perpendicular to the optical axis, and a correction information recording unit at which reference position correction information is recorded, the correction information indicating a reference position for the retreatable blur correction optical system within the plane ranging perpendicular to the optical axis.

1 . A lens barrel comprising: 
 a fixed optical system through which a subject image enters into the lens barrel along with an optical axis;    a retreatable blur correction optical system that corrects an image blur by moving within a plane ranging perpendicular to the optical axis in an operating position and that retreats to a storage position from the operating position;    a blur correction optical system drive unit that drives the retreatable blur correction optical system within the plane ranging perpendicular to the optical axis; and    a correction information recording unit at which reference position correction information is recorded, the correction information indicating a reference position for the retreatable blur correction optical system within the plane ranging perpendicular to the optical axis.    
   
   
       2 . A lens barrel comprising: 
 a fixed optical system through which a subject image enters into the lens barrel along with an optical axis;    a blur correction optical system supported so as to be allowed to move within a plane ranging perpendicular to the optical axis to correct an image blur;    a retreatable optical system that moves between an operating position and a stored position away from the optical axis, the retreatable optical system being constituted with either an optical system independent of the blur correction optical system or an optical system constituting part of the blur correction optical system;    a blur correction optical system drive unit that drives the blur correction optical system within the plane ranging perpendicular to the optical axis; and    a correction information recording unit at which reference position correction information is recorded, the correction information indicating a reference position for the blur correction optical system within the plane ranging perpendicular to the optical axis.    
   
   
       3 . A lens barrel according to  claim 1 , wherein: 
 the reference position is a position where the optical axis of the retreatable blur correction optical system substantially coincides with the optical axis of the fixed optical system.    
   
   
       4 . A lens barrel according to  claim 2 , wherein: 
 the reference position is a position where the optical axis of the blur correction optical system substantially coincides with the optical axis of the fixed optical system.    
   
   
       5 . A lens barrel according to  claim 1 , wherein: 
 the correction information recording unit provides the correction information to an information acquisition device disposed at a camera body on which the lens barrel is mounted.    
   
   
       6 . A lens barrel according to  claim 2 , wherein: 
 the correction information recording unit provides the correction information to an information acquisition device disposed at a camera body on which the lens barrel is mounted.    
   
   
       7 . A lens barrel according to  claim 3 , wherein: 
 the correction information recording unit provides the correction information to an information acquisition device disposed at a camera body on which the lens barrel is mounted.    
   
   
       8 . A lens barrel according to  claim 4 , wherein: 
 the correction information recording unit provides the correction information to an information acquisition device disposed at a camera body on which the lens barrel is mounted.    
   
   
       9 . A camera comprising: 
 a fixed optical system through which a subject image enters into a lens barrel along with an optical axis;    a retreatable blur correction optical system that corrects an image blur by moving within a plane ranging perpendicular to the optical axis in an operating position and that retreats to a storage position from the operating position;    a blur correction optical system drive unit that drives the retreatable blur correction optical system within the plane ranging perpendicular to the optical axis;    a correction information recording unit at which reference position correction information is recorded, the correction information indicating a reference position for the retreatable blur correction optical system within the plane ranging perpendicular to the optical axis; and    a control unit that controls the blur correction optical system drive unit based upon the correction information recorded at the correction information recording unit.    
   
   
       10 . A camera comprising: 
 a fixed optical system through which a subject image enters into a lens barrel along with an optical axis;    a blur correction optical system supported so as to be allowed to move within a plane ranging perpendicular to the optical axis to correct an image blur;    a retreatable optical system that moves between an operating position and a stored position away from the optical axis, the retreatable optical system being constituted with either an optical system independent of the blur correction optical system or an optical system constituting part of the blur correction optical system;    a blur correction optical system drive unit that drives the blur correction optical system within the plane ranging perpendicular to the optical axis;    a correction information recording unit at which reference position correction information is recorded, the correction information indicating a reference position for the blur correction optical system within the plane ranging perpendicular to the optical axis; and    a control unit that controls the blur correction optical system drive unit based upon the correction information recorded at the correction information recording unit.    
   
   
       11 . A camera according to  claim 9 , further comprising: 
 an imaging device that captures a subject image entering thereto via the lens barrel and outputs an image signal, wherein:    the correction information recorded at the correction information recording unit is generated based upon an output from the imaging device.    
   
   
       12 . A camera according to  claim 10 , further comprising: 
 an imaging device that captures a subject image entering thereto via the lens barrel and outputs an image signal, wherein:    the correction information recorded at the correction information recording unit is generated based upon an output from the imaging device.    
   
   
       13 . A camera according to  claim 9 , wherein: 
 the retreatable blur correction optical system is configured to swing from the operating position to the storage position around the optical axis as the lens barrel retracts into a camera body.    
   
   
       14 . A camera according to  claim 10 , wherein: 
 the retreatable optical system is configured to swing from the operating position to the storage position around the optical axis as the lens barrel retracts into a camera body.    
   
   
       15 . A lens barrel adjustment device used to adjust a lens barrel according to  claim 1 , comprising: 
 an imaging device that captures a subject image formed via the lens barrel and outputs an image signal;    a correction information generation unit that evaluates an image signal output from the imaging device while displacing the retreatable blur correction optical system by controlling the blur correction optical system drive unit at the lens barrel and generates reference position correction information indicating a reference position for the retreatable blur correction optical system within the plane perpendicular to the optical axis; and    a recording unit that records the correction information output by the correction information generation unit into a recording medium disposed within the lens barrel.    
   
   
       16 . A lens barrel adjustment device used to adjust a lens barrel according to  claim 2 , comprising: 
 an imaging device that captures a subject image formed via the lens barrel and outputs an image signal;    a correction information generation unit that evaluates an image signal output from the imaging device while displacing the blur correction optical system by controlling the blur correction optical system drive unit at the lens barrel and generates reference position correction information indicating a reference position for the blur correction optical system within the plane perpendicular to the optical axis; and    a recording unit that records the correction information output by the correction information generation unit into a recording medium disposed within the lens barrel.