Ricoh Company, Ltd.

Ricoh Imaging Company, Ltd.

Takehide Ohno

Kazuhiro Fujita

Yuki Hayashi

Hiromichi Atsuumi

Hibiki Tatsuno

Naoki Nakamura

Daisuke Ichii

Koichi Muramatsu

Daisuke Terahara

Terunori Koyama

Masaki Ninomiya

Shigeru Irisawa

Naoki Miyatake

Takashi Ando

Atsushi Sato

Yuuki Satoh

Hiroshi Maegawa

Fumihiro Shimizu

Hideaki Kibune

Kento Nakamura

Toshiyuki Kobayashi

Yoshiaki Aota

Maiko Yasui

Keiji Ohkubo

Naho Shono

A display device includes an image forming unit to form an image and project the image on a transmissive reflector to display a virtual image, an optical element to direct light of the image to the transmissive reflector, a wavelength selective mirror disposed between the image forming unit and the optical element and to separate infrared light from a light beam, and a shielding part to shield or attenuate infrared light. The optical element condenses external light travelling along an optical path opposite to an optical path of the light diffused. The wavelength selective mirror separates infrared light included in the external light condensed by the optical element, and the shielding part is disposed between the wavelength selective mirror and a focal point of the infrared light separated by the wavelength selective mirror. An apparatus includes the display device and the transmissive reflector.

Display device and apparatus

A display device includes a screen to form an intermediate image with light; a concave mirror, and a first mirror disposed between the screen and the concave mirror. The first mirror includes a first reflective area to reflect the light emitted from the screen to the concave mirror; a second reflective area to reflect the light emitted from the concave mirror to an area where a virtual image is formed; and a common reflective area in which the first reflective area and the second reflective area at least partly overlap on each other.

Display device and including a screen concave mirror and flat mirror

An optical device includes an optical system including a plurality of lens groups, at least one lens group being a movable lens group moving in an optical axis direction, and a movable frame to move the movable lens group. The movable frame includes a driving source, a drive screw, a lens supporting frame, and maintaining an integrated state relative to the movable lens group, a plurality of arms disposed in a position to face the drive screw and being openable and closable relative to the drive screw with a single opening and closing axis as a support axis, the plurality of arms including a first arm and a second arm, and a biasing spring configured to apply a biasing force to the first arm in a direction in which the first arm approaches the drive screw, wherein the lens supporting frame is further configured to support the biasing spring.

Lead screw device, lens driver, lens barrel, and camera using the lead screw device

A lead screw device includes a lead screw including a thread portion, and a driven body which engages with the thread portion, and moves in an axis direction of the lead screw along with rotation of the lead screw about an axis, the driven body including a pair of driven members disposed to sandwich the lead screw in a radial direction, wherein the pair of driven members is biased in a direction which sandwiches the lead screw in the radial direction, and a tooth portion provided in each of the driven members engages with the thread portion of the lead screw by a biasing force.

A lens driver which moves at least one lens relative to a supporter includes a holder provided in the supporter to hold the lens to be movable in an optical axis direction, a driver configured to apply to the holder a driving force in the optical axis direction, and a position detector configured to detect a position of the holder in the optical axis direction relative to the supporter, and the lens driver including a coil provided in one of the holder and the supporter to form a straight electric path orthogonal to the optical axis direction, and a magnetic circuit provided in the other of the holder and the supporter, the magnetic circuit including a rectangular magnetic pole surface having a predetermined width to form a magnetic field orthogonal to the optical axis direction and the electric path, and being provided such that the magnetic pole surface faces the optical path.

Lens driver

A shake correcting system includes an optical imaging system, an image sensor, a movable unit comprising a movable frame in which the image sensor is fixed and a rotation restricting element, a base movably supporting the movable unit in a predetermined plane substantially orthogonal to an optical axis of the optical imaging system, a drive mechanism driving the movable unit relative to the base in directions vertical and orthogonal to the optical axis, a blur correcting function to correct blurs in a subject image due to shakes of the shake correcting system, a rotation restricting mechanism preventing rotation of the movable frame around the optical axis with the rotation restricting element, and a slide mechanism allowing the movable unit to be freely movable in the predetermined plane, and comprising a magnet, a magnetic plate attracted to the magnet, a spherical element supported between the magnetic plate and the magnet.

Shake correcting system with slide mechanism which allows unit to be freely movable, lens barrel, imaging device and hand-held data terminal

A lens barrel includes a lens group including a fixed lens including one or more lenses and an adjustment lens including one or more lenses, and a lens frame to hold the lens group, including an adjustment lens frame to hold the adjustment lens and an aligning mechanism to hold the adjustment lens frame movably in a direction orthogonal to an optical axis of the lens group relative to the lens frame.

Lens barrel

An imaging apparatus includes a barrel unit having a photographic lens, an image pickup device configured to receive light through the photographic lens to capture a subject image, a movable unit configured to movably support the image pickup device in a direction perpendicular to a light-receiving axis of the subject image, a processing unit configured to process signals from the image pickup device, a flexible board configured to connect the image pickup device to the processing unit, and a positioning unit configured to position the flexible board.

Image apparatus and electronic device

A lens barrel includes a first lens holding member holding a first lens group, a second lens holding member holding a second lens group and an adjustment mechanism capable of adjusting the position of the first lens holding member relative to the second lens holding member. On a first plane of the second lens holding member, provided are at least three positioning parts abutting on the first lens holding member at positions surrounding the second lens group, and a sheet member attached to the first plane at a position surrounding the three positioning parts. The sheet member is pressed against the first lens holding member in the photographing optical axis direction while surrounding the first lens group throughout, between the adjustment mechanism and the first plane when viewed in the photographing optical axis direction.

An image blur correction device includes: a movable frame which is equipped with a lens or an imaging element and has a guide part; a fixed frame having a guide supporting part which movably supports the movable frame by coming into contact with the guide part; and a drive mechanism which drives the movable frame for correcting image blur by moving the movable frame relative to the fixed frame. The fixed frame has magnetic bodies, and the movable frame has urging magnets at positions corresponding to the magnetic bodies. Specifically, the urging magnets use attractive force between the magnets and the magnetic bodies, so as to urge the movable frame in a direction in which the guide part and the guide supporting part come into contact with each other.

Image blur correction device and imaging apparatus equipped therewith

The magnitude of magnetic attraction generated between an electromagnetic coil and a magnetic metal member (or an amount of electric current flowed to the electromagnetic coil) is controlled depending on a direction of acceleration (acceleration caused by the gravity (a gravitational acceleration) and acceleration caused by shake (shake acceleration)) working on an imaging apparatus. This magnetic attraction moves a second slider (including a CCD and a first slider) as a whole toward the electromagnetic coil. This movement brings two inclined surfaces (or fourth and fifth surfaces) of a shaft holeinto contact with a second guide shaft with no gap being interposed in between, and keeps the this contact condition.

Imaging apparatus having a biasing part configured to generate a biasing force to bias a part of the image pickup device

An imaging device includes an angular velocity sensor (), which outputs a blurring signal, a high-pass filter circuit unit (), which eliminates a direct current component in accordance with a first time constant, and which outputs a fluctuation portion with respect to a reference voltage as an angular velocity signal, an analog switch ASW (), which cause a charge that is accumulated within the high-pass filter circuit unit () to discharge according to a second time constant, a computation unit (), which is for performing a computation in order to correct a blurring of an image in accordance with the angular velocity signal, and a detection circuit unit (D), which, in order to detect a change over time of the angular velocity of the camera body, samples the angular velocity signal on a per fixed time interval basis, obtains a derivative in accordance with a value thus sampled of the angular velocity signal, and detects a change over time in a size of the derivative thus obtained, wherein the time constant of the high-pass filter is switched between the first time constant and the second time constant of the high-pass filter by controlling a switching on or off of the analog switch in accordance with the result of the detection that is performed by the detection circuit unit (D).

Image blurring correction device and imaging device using the same with a high pass filter

An image pickup apparatus includes a gyro sensorthat detects camera shakes, a feed forward value is calculated by multiplying a first coefficient cto an output value of the gyro sensorwhen the output value of the gyro sensoris less than a first predetermined value, another feed forward value is calculated by multiplying a second coefficient csmaller than the first coefficient cto an output value of the gyro sensorwhen the output value of the gyro sensoris greater than or equal to the first predetermined value, each of the products is respectively added by an addition device to an output value of a drive signal.

Image pickup apparatus

A photographing apparatus which performs an image-blur suppression properly even through a computation device disposed in a main body of the photographing apparatus and a photographing element movable along an XY plane are electrically connected is provided according to the present invention. The image-blur suppression mechanism comprises a flexible base plateincluding a second linear partand a fourth linear partwhich are plastically deformed along Z axial direction, meeting such a condition that an intersection line between a plane containing the second linear partand the XY plane and an intersection line between a plane containing the fourth linear partand the XY plane are intersected with XY axes, respectively.

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Kanagawa, Japan

Takehide Ohno