Patent Number: 7,738,781

Title: Position detecting circuit and imaging apparatus

Abstract: A position detecting circuit provided in an imaging apparatus having an optical system that images a subject image, an imaging element that performs photoelectric conversion of the subject image, and a release switch capable of setting states of two stages includes: a plurality of magnetic field change detecting elements that detect the intensity of a magnetic field formed by a magnetic field generating body attached to either the optical system or the imaging element and that are provided so as to be separated from each other; a position detecting portion that detects the position of the magnetic field generating body on the basis of outputs from the plurality of magnetic field change detecting elements; and a standby portion that stops a function of at least one of the position detecting portion and the plurality of magnetic field change detecting elements until a first stage of the release switch is set.

Inventors: Harada; Yasunari (Ebina, JP), Takeuchi; Hisashi (Tokyo, JP), Miyasako; Kenichi (Kawasaki, JP)

Assignee: Olympus Corporation

International Classification: G03B 17/00 (20060101); H04N 5/228 (20060101); G01B 7/00 (20060101); H01L 43/06 (20060101)

Expiration Date: 2022-06-15 0:00:00