Camera apparatus

G - Physics – 03 – B

Patent

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Details

G03B 5/00 (2006.01) G02B 27/64 (2006.01) G03B 17/00 (2006.01) H04N 5/232 (2006.01) H04N 5/76 (2006.01)

Patent

CA 2088205

A camera shake correcting apparatus includes a variable angular prism assembly, a microcomputer to produce signals for driving the variable angular prism assembly, prism actuators, vertical angle sensors, angular velocity sensors for detecting an angular velocity caused by the camera shaking, and damping coils. The variable angular prism assembly is driven by a signal obtained by subtracting detected results of the vertical angle sensors from detected results of the angular velocity sensors. A damping coil is used to produce rotational angular velocity signals so that a nonlinearity of the prism can be alleviated. The phase margin of the servo characteristic of the prism drive system is increased, so that the camera shake correcting apparatus can be generally independent of variations in values and dimensions that occur in mass-production manufacturing operations and free of dependency on temperature characteristics.

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