Nikon Corporation

Naoki Kitaoka

Keiji Ohsawa

Kosho Miura

An imaging apparatus having an imaging element which photoelectrically converts a photographic object image at a photoelectric conversion face, an optical member provided on a front face of the element and which forms an image of the object image on the face, an oscillation element which oscillates the member, an oscillation element driving means which makes the oscillation element oscillate according to each of oscillation modes having different oscillation forms, a foreign object specifying means which specifies a position of a foreign object attached to the optical member based on image data of a white screen imaged by the imaging element, and an oscillation control means which selects an oscillation mode where the foreign object is present at a peak portion of the oscillation form, based on the foreign object specified by the foreign object specifying means, and changes an oscillation condition of the oscillation mode.

Imaging apparatus and foreign object removal program

A mirror recoil preventing device suitable for a camera has a mirror and a mirror support frame. The mirror support frame movably supports the mirror in movement from a first position to a second position. In a camera having a photographic lens and a range finding element, the mirror guides light from the photographic lens to the range finding element when positioned at the second position. As a first alternative, the mirror support frame has a U-shaped groove at one end thereof. A regulating member is located in the vicinity of the second position to engage with the U-shaped groove when the mirror support frame is at the second position. As a second alternative, the mirror support frame has a leading edge and a trailing edge such that in movement from the first position to the second position, the trailing edge trails the leading edge. A first regulating member is located to be immediately adjacent to the leading edge of the mirror support frame when the mirror support frame is at the second position. A second regulating member is located to be immediately adjacent to the leading edge of the mirror support frame when the mirror support frame is at the second position.

Mirror recoil preventing device

Fitting holes are formed on a line of extension or a substantially vertical bisector in an arranging direction of a pair of lenses of a plastic plate formed integrally with at least the pair of lenses. Correspondingly, bosses are formed protruding from a base body using an adherable material so that a height thereof is larger than a sum of a thickness of the plastic plate and a thickness of a stop plate. Even after attaching the stop plate and the plastic plate to the base body, the bosses are protrudable from the plastic plate. Thus, the plastic plate and the stop plate are fixed in a sandwiched state between the base body and an adhesive agent. The plastic lens having a poor adhesion with the adhesive agent can be surely fixed without increasing the number of parts, and an instability of a positional accuracy due to environmental changes is obviated.

Structure for attaching a lens to prevent distortion from changes in the

In order to obtain a focus detection device that can perform pupil adjustment accurately in all of a plurality of focus detection areas, field lenses corresponding to each focus detection area in a focus detection device having a plurality of focus detection areas are comprised of separate materials for each focus detection area, and independent adjustment of the eccentricity of the field lens corresponding to each focus detection area is made possible in the plane perpendicular to the optical axis of each field lens so that pupil adjustment can be performed independently for each of the plurality of focus detection areas.

Focus detection device and method of adjusting focus detection device

A photographing information setting device includes a first photographing information signal generator for releasing a first signal for varying a photographing information by a predetermined step, in response to the operation of an externally operable first operation member; a second photographing information signal generator for releasing a second signal for varying a photographing information by a step larger than the predetermined step mentioned above, in response to the operation of an externally operable second operation member, which indicates the set photographing information by the operated position thereof; and a signal generator for generating a third signal instead of the second signal when the second operation member is set at a predetermined position. In the device, a photographing information according is set to the first signal when the third signal is generated, or according to the second signal when the third signal is not generated.

Photographing information setting device for camera

The invention provides an automatic focus system which can pursue a subject beyond established limits when the subject is moving. This invention is an automatic focus system equipped with a drive mechanism which automatically drives the focus adjustment lens and which contains a control mechanism which controls the drive range of the drive mechanism, a movement determination mechanism which determines whether the subject is moving, and a control release mechanism which releases the control of the control mechanism when it is determined by the movement determination mechanism that the subject is moving.

Growing community of inventors

Tokyo, Japan

Naoki Kitaoka