Abstract A blur correction camera includes an optical axis changing unit to change an optical axis of a photographing optical system to correct a blur generated by vibration, a displacement detecting unit to detect displacement of the photographing optical system by the optical axis changing unit, a calculation unit to calculate a displacement velocity of the photographing optical system on the basis of a detection result from the displacement detecting unit, a centering unit to drive the optical axis of the photographing optical system to a central position based on the displacement detected by the displacement detecting unit, and a maximum displacement velocity detecting unit to detect a maximum displacement velocity upon movement of the photographing optical system by the centering unit. Whether a blur correction function is normal is discriminated on the basis of a detection result from the maximum displacement velocity detecting unit.
A blur correction camera comprising: an optical axis changing unit to change an optical axis of a photographing optical system to correct a blur generated by vibration; a displacement detecting unit to detect displacement of said photographing optical system by said optical axis changing unit; a calculation unit for to calculate a displacement velocity of said photographing optical system on the basis of a detection result from said displacement detecting unit; a centering unit to drive the optical axis of said photographing optical system to a central position; and a maximum displacement velocity detecting unit to detect a maximum of said displacement velocity on the basis of a result from said calculation unit upon movement of said photographing optical system by said centering unit, wherein whether a blur correction function is normal is discriminated on the basis of a detection result from said maximum displacement velocity detecting unit.
Claim 2
Dependent Claim
148 words
A blur correction camera comprising: an optical axis changing unit to change an optical axis of a photographing optical system to correct a blur generated by vibration; a displacement detecting unit to detect displacement of said photographing optical system by said optical axis changing unit; a calculation unit for to calculate a displacement velocity of said photographing optical system on the basis of a detection result from said displacement detecting unit; a centering unit to drive the optical axis of said photographing optical system to a central position; and a maximum displacement velocity detecting unit to detect a maximum of said displacement velocity on the basis of a result from said calculation unit upon movement of said photographing optical system by said centering unit, wherein whether a blur correction function is normal is discriminated on the basis of a detection result from said maximum displacement velocity detecting unit.
Claim 3
Dependent Claim
37 words
A camera according to claim 1, wherein a determination is made that the blur correction function is not normal when a value detected by said maximum displacement velocity detecting unit is not more than a predetermined value.
Claim 4
Dependent Claim
35 words
A camera according to claim 2, wherein said maximum displacement velocity detecting unit starts detection of the maximum displacement velocity a predetermined period of time after the beginning of movement of said photographing optical system.