Fuji Photo Optical Co., Ltd.

Toshihisa Ishijima

Kouichi Nagata

Kenichi Takahashi

Koichi Nagata

Mokuyoo Nakano

In the laser range finder, a sending portion that emits laser light to a target and a receiving portion that receives the laser light reflected by the target are supported on a gimbals together with erecting prisms of a binocular optical system, and their attitudes are controlled so as to be secured to an inertial system. This eliminates influence of a shake, and allows accurate aiming at a faraway target and measurement of a distance thereto with high accuracy.

Laser range finder

In an image stabilizing apparatus in which an actuator for a pivoting gimbal suspension is controlled by a feedback loop, the gain of feedback loop based on the angular position is enhanced when the angular velocity is at a first set value or higher until the angular velocity becomes a second set value or lower, whereby a panning mode is automatically attained when a pan/tilt operation is carried out. Also the gain of feedback loop based on the angular position is enhanced when the angular velocity is enhanced until a lapse of a predetermined time after starting the pivoting control of the gimbal suspension, whereby the behavior of gimbal suspension is stabilized.

Image stabilizing apparatus

In an image stabilizing apparatus in which an actuator for pivoting a gimbal suspension is driven under PWM control by way of a driving circuit, the pulse width of waveform outputted from a CPU to the driving circuit is enhanced when the power voltage V in the driving circuit drops. The CPU reads out the power voltage V and enhances the pulse width of output waveform from W to W as the power voltage V decreases from its rated voltage V to a lower voltage V . The correction rate (W /W ) is set to the reciprocal (V /V ) of the drop rate of power voltage V , so as to yield an appropriate actuator driving power in response to the drop in power voltage V .

In an image stabilizing apparatus in which inner and outer gimbals are pivoted about two pivotal axes so as to fix an erect prism with respect to an inertial system, a torsion coil spring is disposed to provide one-side stressing between the inner and outer gimbals so as to pivotally stress the inner gimbal with respect to the outer gimbal in one direction. When image stabilizing control is started, the elastic force of the torsion coil spring instantly changes the angular position of the inner gimbal so that a capacitor is charged earlier, thereby enhancing the response in PWM control.

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Omiya, Japan

Toshihisa Ishijima