US 6,606,457 B2Granted

Focused image tremble correcting device

AssigneePENTAX Corporation

InventorShigeo Enomoto

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Abstract

A first rotating board is supported on a fixed member, being rotatable around a first pivot shaft. A second rotating board is supported on the first rotating board, being rotatable around a second pivot shaft. The first and second rotating boards are respectively rotated by first and second driving mechanisms. A lens holding member, which holds a correction lens, is fixed at an opening portion of the second rotating board. The lens holding member pierces through opening portions of the fixed member and the first rotating board. The first and second driving mechanisms are controlled such that a focused image tremble can be canceled by a combination of the displacement of the correction lens due to the rotation of the first rotating board and the displacement of the correction lens due to the rotation of the second rotating board.

Claims10

Dependent claims

A focused image tremble correcting device comprising:

a tremble detector that detects a tremble of an optical device;
a correction optical system that is included in an imaging optical system of said optical device and corrects said tremble;
a fixed member that is fixed in said optical device;
a first rotating member that is supported on said fixed member and rotates said correction optical system around a first rotating axis which is parallel to an optical axis of said correction optical system;
a second rotating member that is supported on said first rotating member and rotates said correction optical system around a second rotating axis which is parallel to said optical axis of said correction optical system;
and
a controller that calculates a moving component for an object image in a first linear direction on a focal plane of said imaging optical system, said moving component being due to an angular tremble of the optical axis of said imaging optical system, and the calculation being based on the result of said tremble detector, and that cancels said moving component in said first linear direction by controlling rotations of both said first rotating member and said second rotating member.

4 more elements

Dependencies are inferred from the claim text.