Shooting lens having vibration reducing function and camera system for same

Abstract

The present invention includes a blur correction mechanism, a vibration detection section, a standard value generation section, a target driving position calculation section, and a driving section. Wherein, the blur correction mechanism corrects image blur. The vibration detection section outputs a vibration detection signal. The standard value generates a standard value of a part of the presumed vibration detection signal. The target driving position calculation part obtains the vibration component of image blur according to the difference between the vibration detection signal and the standard value, and obtains the target driving position of the blur correction mechanism. The drive section controls the blur correction mechanism to a target drive position. In particular, the standard value generation section corrects the standard value accordingly based on the image movement signal obtained from the captured image. Through the correction of the standard value, a more accurate standard value is obtained, thereby improving the performance of blur correction.

Description

[0001] The disclosures of the following prior applications are hereby incorporated by reference: [0002] (1) Japanese Patent Application No. 2003-279688, filed on July 25, 2003. [0003] (2) Japanese Patent Application No. 2003-280097, filed on July 25, 2003. technical field [0004] The present invention relates to a photographing lens and a camera system for correcting image blur of a subject image. Background technique [0005] Conventionally, it is known that a blur correction mechanism is driven to correct image blur of a subject image caused by hand shaking or the like. [0006] In this prior art, first, there are a blur correction mechanism (blur correction optical system, etc.) and an angular velocity sensor. Then, the vibration of the photographic lens or camera is detected by this angular velocity sensor. The photographic lens determines the position of the blur correction mechanism required to eliminate image blur (hereinafter referred to as "target drive posi...

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Problems solved by technology

Like this, when the tendency force becomes stronger, the control stability of the fuzzy correction decreases, and in the worst case, vibration may even occur

[0027] Also, the inventors of the present application have found the problem that when the image movement signal is fed back to the blur correction, due to the multiplication of the feedback and the center bias, the control stability of the blur correction is significantly lost and becomes very difficult. prone to vibration

[0028] In addition to this, the inventors of the present application have also found such a problem that when the image movement signal is fed back to the blur correction, the blur correction mechanism has unnecessary oscillation when the blur correction is stopped

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