Hiroya Kusaka

Control Technology for Optical Image Stabilization

A controi szsterater image stabilizing ens harrel has been developed Optimization of the control system through computer simulation maximized the effect of compensating image fluctuations, resulting in a high image fluctuation suppression rate (-37 dB). The results of computer simulation were consistent with those of experiments using prototype models, resulting in reduced development time. The application of this simulation technology has made it easier to adjust image fluctuation suppression characteristics. The load placed on the control microcomputer was decreased by reducing the drive frequency of the image stabilization motors. As a result, the camera control and image stabilization processes are both implemented in a one-chip microcomputer, which helps to minimize the control circuit.

Measurement and description method for image stabilization performance of digital cameras

Image stabilization functionality is widely acknowledged as an automated function of digital cameras. However, because unified methods of measurement of stabilization performance had not been developed, the Camera and Imaging Products Association (CIPA) standardized the measurement and description methods for image stabilization performance.

New approach on multi-axial analysis of camera shake

A new measurement on camera shakes featuring a combination of a gyro sensor and signal processing is reported. For higher accuracy, shake movements are separated into rotational and translational motions. Advanced quantitative analysis on image quality is also presented considering the effect from translation which was not discussed previously.

Optical Image Stabilizing Lens System

An ultra-small lens system and lens barrel with an optical image stabilization function have been developed. The lens system has several lens groups, including a compensation lens unit. Shifting the compensation lens unit adjusts the optical axis to compensate for image fluctuation. The use of advanced technology to design the lens system made it possible to minimize aberrations during image stabilization. An image stabilization mechanism, along with the precise arrangement of Hall elements and magnets, is used to accurately position the compensation lens unit. The frequency response achieved with this mechanism is sufficient to compensate for image fluctuations while reducing the drive load.