US 5,659,806 AGranted

Shake preventing apparatus

AssigneeNikon Corporation

InventorsHidenori Miyamoto, Yoshio Imura, Junichi Omi, Isao Soshi, Minoru Kato

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Abstract

A shake preventing apparatus comprises a shaking sensor for detecting a shake, a shaking preventive optical system for preventing an image shake by this optical system being shifted in a direction substantially orthogonal to an optical axis of a principal optical system, motors for driving this shaking preventive optical system to prevent the shake detected by the shaking sensor, photo interrupters for detecting a shift position of the shaking preventive optical system and a control circuit for controlling the motors on the basis of detection signals from the photo interrupters. The photo interrupters are disposed within a range so as not to exceed a thickness of the shaking preventive optical system in an optical-axis direction.

Claims9

Dependent claims

A shake preventing apparatus comprising:

a shake detecting device which detects a shake;
a shaking preventive optical system which prevents an image shake by said shaking preventive optical system being shifted in a direction substantially orthogonal to an optical axis of a principal optical system;
a shaking preventive optical system driving device which drives said shaking preventive optical system to prevent the shake detected by said shake detecting device;
a shaking preventive optical system position detecting device which detects a shift position of said shaking preventive optical system;
and
a control device which controls said shaking preventive optical system driving device on the basis of a detection signal from said shaking preventive optical system position detecting device, wherein
said shaking preventive optical system is shiftable in a plurality of directions substantially orthogonal to the optical axis, and
a respective shaking preventive optical system position detecting device is provided for each of the directions of the plurality of directions in which said shaking preventive optical system is shiftable and comprises first and second photo interrupters which each produce a corresponding output signal, the respective shaking preventing optical system position detecting device detecting the position of the shaking preventive optical system in the respective direction from the corresponding output signals of the first and second photo interrupters.

5 more elements

A shake preventing apparatus comprising:

an main optical system which includes a shake preventing optical system for preventing image shake of an image formed by the main optical system, the shake preventing optical system being shiftable in a first direction that is perpendicular to the optical axis of the main optical system, and in a second direction that is perpendicular to the optical axis of the main optical system and perpendicular to the first direction;
a first position detecting device which detects the position of the shake preventing optical system as the shake preventing optical system is shifted in the first direction, the first position detecting device including first and second photo interrupters which each produce a corresponding output signal, the position of the shake preventing optical system in the first direction being detected by analyzing the output signals corresponding to the first and second photo interrupters together;
and
a second position detecting device which detects the position of the shake preventing optical system as the shake preventing optical system is shifted in the second direction, the second position detecting device including first and second photo interrupters which each produce a corresponding output signal, the position of the shake preventing optical system in the second direction being detected by analyzing the output signals corresponding to the first and second photo interrupters together.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 08/312,988Filed 3 Oct 1994
Priority: JP 5-2711475 Oct 1993
Granted: 19 Aug 1997
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04N 23/6812
Motion detection: based on additional sensors, e.g. acceleration sensors
G02B 27/646
Imaging systems using optical elements for stabilisation of the lateral and angular position of the image: compensating for small deviations, e.g.…
G03B 5/08
Adjustment of optical system relative to image or object surface other than for focusing: swing backs
H04N 23/68
Control of cameras or camera modules: for stable pick-up of the scene, e.g. compensating for camera body vibrations