Imaging apparatus with camera shake compensation
View Patent ↗A lens unit is provided with two CCD image sensors and a color-separation prism for separating subject light into green light (G light), and a mixture of red light (R light) and blue light (B light). The color-separation prism allows the G light to enter into one of the CCD image sensors, and the mixture of the R and B light to enter into the other CCD image sensor. Sensor moving mechanisms drive the CCD image sensors individually in a plane perpendicular to an optical axis when camera shake is detected, thereby preventing the image from blurring.
1. An imaging apparatus, comprising:
a first image sensor and a second image sensor for capturing subject light, which has transmitted through a taking optical system;
a color-separation optical system for separating said subject light into its component colors each of which enters into a corresponding said first image sensor and second image sensor; and
plural sensor moving devices each of which moves a corresponding said first image sensor and a second image sensor in a plane perpendicular to an optical axis of said taking optical system,
wherein each of said plural sensor moving devices comprises a first supporting plate for supporting a corresponding said first image sensor and second image sensor, a second supporting plate for supporting said first supporting plate movably in a first direction, and a supporting board for supporting said second supporting plate movably in a second direction, said first actuator being provided on a front surface of said second supporting plate, whereas said second actuator being provided on a front surface of said supporting board, said first supporting plate being connected with a drive rod of said first actuator, whereas said second supporting plate being connected with a drive rod of said second actuator.
2. The imaging apparatus claimed in claim 1 , further comprising:
a shake detector for detecting direction and magnitude of a shake from outside; and
a shake corrector for calculating a driving direction and driving amount of each of said plural sensor moving devices based on the detected direction and magnitude of said shake to correct a positional deviation of a subject image on an imaging surface of each of said first image sensor and second image sensor, and for driving each of said plural sensor moving devices according to the calculated driving direction and driving amount.
3. The imaging apparatus claimed in claim 2 , wherein each of said plural sensor moving devices comprises first and second actuators for moving a corresponding said first image sensor and said second image sensor in two directions orthogonal to each other in said plane perpendicular to the optical axis.
4. The imaging apparatus claimed in claim 1 , wherein said color-separation optical system is a color-separation prism of a rectangular parallelepiped shape formed by a combination of two rectangular prisms, said color-separation optical system being provided in a position where perpendicular lines from surfaces of each of said first image sensor and second image sensor cross.
5. An imaging apparatus claimed in claim 1 , wherein, the second supporting plate is provided on the front surface of the supporting board and the first supporting board is provided on the front surface of the second supporting plate and a corresponding first or second image sensor is provided on the front surface of the first supporting plate.