Matsushita Electric Industrial Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Panasonic Corporation

Masayuki Hino

Taisei Funaki

Hiroshi Yoda

Takaaki Tomita

Mitsuhisa Fujiki

Tetsuya Okana

Takashi Kokuwa

Suekazu Kugioka

A viewfinderincludes a finder optical system Sincluding first and second lens groups L, L; a zoom frameprovided with first and second cam groovesconfigured to rotate about an optical axis Ato move the first and second lens groups L, Lin the optical axis direction in accordance with the shapes of the first and second cam grooves; and a diopter adjusterconfigured to adjust the diopter of the finder optical system S. The diopter adjusterchanges the position of the zoom framein the optical axis direction to adjust the diopter of the finder optical system S, and adjusts, during rotation of the zoom frame, the position of the zoom framein the optical axis direction such that the diopter of the finder optical system Sis maintained.

Viewfinder

Viewfinder and imaging apparatus including the same

A lens barrel includes a barrel main body, a first lens movement frame, a magnetic scale, and a magnetic sensor. The first lens movement frame is arranged movably in the optical axis direction of the optical system with respect to the barrel main body. The magnetic scale is provided to the first lens movement frame. The magnetic sensor is arranged on the outside of the barrel main body, and detects the position of the first lens movement frame with respect to the barrel main body by detecting the position of the magnetic scale with respect to the barrel main body.

Lens barrel

A photographic light is spectrally separated by a spectral prismprovided in an image-formation area R of the photographic light whose luminous flux is adjusted by a group of lenses-for adjusting the luminous flux so as to image-form the photographic light. Respective lights spectrally separated by the spectral prismare imaged by means of the imaging elements. An infrared-ray element of the photographic light whose luminous flux is being adjusted is eliminated by an infrared-ray cut filter. The infrared-ray cut filteris advanced and retreated by a mechanism unitbetween a position in an optica path of the photographic light and a position distant from the optical path. In the foregoing constitution, the infrared-ray cut filterand the mechanism unitare disposed in a luminous flux convergence area R of the photographic light whose luminous flux is being adjusted by the group of lenses-

Image pickup device including an infrared-ray cut filter

A method of manufacturing the front surface shape of plural magnetic heads precisely in batch in a desired dimension After fixing plural magnetic heads,and preliminarily processing curved surfaces along the sliding direction S on a rotary member,, the curved surfaces Ts along the thickness direction T orthogonal to the sliding direction S of the magnetic heads,are formed in batch by finish polishing process by means of abrasive tape or the like.

Rotary head device, magnetic head unit and manufacturing method thereof

A movable filter device comprises a rotary plate for holding an optical filter, a holding plate for holding the rotary plate rotatably at a pivot point, stopper pins, and a torsion coil spring. The torsion coil spring has one end coupled to the holding plate and the other end coupled to the rotary plate, and generates a force for extending both ends thereof. The force generated by the torsion coil spring prevents the rotary plate from stopping at positions other than those defined by the stopper pins. The rotary plate has slender portions of low rigidity for absorbing the impact of collision between the rotary plate and stopper pins.

Growing community of inventors

Osaka, Japan

Masayuki Hino