Fuji Xerox Co., Ltd.

Sony Corporation

Sony Electronics Inc

Olympus Imaging Corporation

Olympus Corporation

Yuki Kubota

Isamu Arie

Yasutaka Gotoh

Koji Okabe

Fumiya Matsuoka

Ryutaro Sakai

Takayuki Ryu

Kuninori Hyogo

Yasutaka Goto

Hiroko Furukata

Toyoki Kon

Masato Miyata

Tahei Nakamura

Nobumasa Kanbayashi

Takashi Sato

Kazuteru Kawamura

Yasuharu Yamada

Kenji Sawai

Takuya Motoishi

Hiroya Fujii

Masaaki Kato

Noribumi Sato

Ryo Yamamoto

Tetsuya Yanai

Michelle Koza

Takuya Kobayashi

Junichi Kanai

Junichi Uchiyama

Keiichi Okada

Jouta Kobayashi

Justin Randolf Jakobson

Hirotaka Yamamoto

Daichi Murakami

Kazushi Sakuma

Masahiro Takihara

Jota Kobayashi

Alex Isama Arie

Akiko Miyake

A zoom optical system includes a front-side lens unit, an intermediate lens unit, and a rear-side lens unit. The front-side lens unit includes a first front unit and a second front unit, and a distance between the first front unit and the second front unit is wider at a telephoto end than at a wide angle end. The intermediate lens unit includes a first intermediate unit and a second intermediate unit, and a distance between the first intermediate unit and the second intermediate unit is narrower at the telephoto end than at the wide angle end. A distance between the second intermediate unit and a lens unit adjacent to the second intermediate unit varies. The second intermediate unit moves at the time of focusing, and the following conditional expressions (1) and (2) are satisfied:0.9&#x2264;&#x2264;1.17&#x2003;&#x2003;(1)4.2&#x2264;&#x2264;20.0&#x2003;&#x2003;(2).

Zoom optical system, image pickup optical system, and image pickup apparatus using the same

A macro lens includes an object-side lens unit having a positive refractive power, a first focusing lens unit having a negative refractive power, a second focusing lens unit having a positive refractive power, an aperture stop, an intermediate lens unit which includes a lens component having a positive refractive power, and a wobbling lens unit. The aperture stop and the intermediate lens unit are disposed between the first focusing lens unit and the second focusing lens unit, the aperture stop is adjacent to the lens component having a positive refractive power, and the following conditional expressions (1), (2), and (3) are satisfied:2&#x3c;1|&#x3c;15&#x2003;&#x2003;(1)2&#x3c;2|&#x3c;15&#x2003;&#x2003;(2)0.5&#x3c;||&#x3c;1.5&#x2003;&#x2003;(3).

Macro lens and image pickup apparatus using the same

A zoom lens includes, in order from the object side, a first lens unit having a positive focal length, a second lens unit having a negative focal length, a third lens unit having a positive focal length, a fourth lens unit having a negative focal length, and a fifth lens unit having a positive focal length, wherein following Conditional Expressions (1) and (2) are satisfied:0.3&#x2264;3445&#x2264;1&#x2003;&#x2003;(1), and0.2&#x2264;(3445)/(3445)&#x2264;0.6&#x2003;&#x2003;(2).

Zoom lens and image pickup apparatus using the same

Provided is an external structure configured to be attached to or detached from an electronic device having a concave portion formed on a surface of a housing, and a connection connector provided in a position of the concave portion receding from the surface of the housing, the concave portion having a cross-sectional shape enabling locking of the external structure, the external structure including a first fitting unit configured to be fitted to the connection connector.

Electronic device and external structure configured to attach to or detach from the electronic device

An image forming apparatus includes an image forming device that forms an image on a recording medium with a powdery material, the image being sized so as to extend beyond an edge of the recording medium; a collecting device that collects the material that has extended off the recording medium as a result of the image forming device forming the image; and a restricting unit that controls the image forming device in such a manner that the image forming device reduces an amount of use of the material in a region of the image that extends off the recording medium to a larger degree on an outer side of the image than a side of the image near the recording medium.

Image forming apparatus

An image forming apparatus includes a rotating fixing unit, a switching unit, and a control unit. The rotating fixing unit has a surface, the surface fixing a toner image on a recording medium by contacting the recording medium. The switching unit switches between transportation directions in which the recording sheet is transported such that an orientation of a predetermined side of the recording medium with respect to the fixing unit matches either an orientation corresponding to a first direction in which the central axis of the fixing unit extends or an orientation corresponding to a second direction that is perpendicular to the first direction. The control unit controls the switching unit such that the recording medium is transported in a direction corresponding to a smaller one of integration values obtained along the first direction and the second direction.

Image forming apparatus, non-transitory computer readable medium, and image forming method of switching an orientation of a recording medium

A fixing device includes a pressing member that is rotatably held and provides a pressure acting in one direction; a heating member that is rotatably held, faces the pressing member, and includes a substantially cylindrical member and a heating unit, the substantially cylindrical member receiving the pressure, the heating unit being provided inside the substantially cylindrical member, the heating member fixing a toner image on a sheet with the pressure and heat; a drive source that outputs a driving force with which the heating member is rotated; and a transmission member having a space that receives an end of the substantially cylindrical member with a gap interposed therebetween, the transmission member having an inner circumferential surface that comes into contact with the end of the substantially cylindrical member in the space when the substantially cylindrical member receives the pressure, the transmission member transmitting the driving force to the heating member.

Fixing device and image forming apparatus

A temperature sensor includes a front surface; a back surface; a first temperature-sensitive element and a second temperature-sensitive element disposed side by side between the front surface and the back surface; an infrared-ray absorber; and a heat-transfer inhibitor. When the temperature sensor is exposed to infrared rays that have propagated from both of a front-surface side and a back-surface side of the temperature sensor, the infrared absorber heats up by absorbing the infrared rays and transfers heat to the first temperature-sensitive element and the heat-transfer inhibiter inhibits heat transfer to the second temperature-sensitive element caused by the infrared rays.

Temperature sensor, fixing device, and image forming apparatus

A fixing device includes: a cylinder member that rotates in a circumferential direction thereof; a circulating member that circularly moves in a circumferential direction thereof and is pressed against the cylinder member; a heat source that heats a recording medium holding an unfixed toner image and nipped between the cylinder member and the circulating member; and a pressing member provided inside the circulating member, and including a nip forming portion that presses the circulating member against the cylinder member to form a nip region therebetween, and a thrusting portion that thrusts, upstream of the nip forming portion in a moving direction of the circulating member, and from inside the circulating member toward the cylinder member, the circulating member before being pressed against the cylinder member such that the thrust is greater in end portions of the circulating member than in a central portion of the circulating member.

Fixing device, image forming apparatus, and fixing method

A zoom lens system includes in order from an object side to an image side a first lens unit having a positive refracting power; a second lens unit having a negative refracting power; a third lens unit having a positive refracting power; and a fourth lens unit having a positive refracting power. At the time of zooming from a wide angle end to a telephoto end, each of distances between the first lens unit and the second lens unit, between the second lens unit and the third lens unit, and between the third lens unit and the fourth lens unit is changed, and the first lens unit is moved. The first lens unit includes a lens component having positive refracting power, a total number of lens components included in the first lens unit is one, and the third lens unit includes five lens elements.

Zoom lens system and image pickup apparatus using the same

A fixing device includes a fixing member that is rotatable and heated by a heater; an endless belt member that is rotatable while being in contact with the fixing member; and a pressing member that is disposed inside of the belt member. The pressing member presses the fixing member with the belt member therebetween so as to form a fixing nip between the fixing member and the belt member, the fixing nip allowing a recording medium to pass therethrough to fix a toner image onto the recording medium. In an output region of the fixing nip from which the recording medium is output from the fixing nip, a curvature of a cross-sectional shape of an end portion of the belt member in a width direction is larger than a curvature of a cross-sectional shape of a middle portion of the belt member in the width direction.

A fixing device includes a rotatable heating member including a heat source and a pressure-applying member pressed against the heating member. The pressure-applying member includes a band-shaped member that extends in a width direction of a medium that passes through a fixing area, a support member opposed to the heating member with the band-shaped member disposed therebetween, and a pressing member including a base-end portion supported by the support member and a free-end portion that extends toward the fixing area. The pressing member has urging portions arranged with intervals therebetween in the width direction. The urging portions are elastically deformable in accordance with a thickness of the medium when the medium passes through the fixing area. The free-end portion urges the band-shaped member toward the heating member so that the band-shaped member is pressed against the heating member.

Pressure-applying member, fixing device, and image forming apparatus

A heating device including a heating member that heats a recording medium; a pressure unit that applies pressure to the heating member; and a rotation member that is mounted to the heating member. The rotation member is rotated upon receiving an external force and the heating member is rotated along with a rotation of the rotation member by a frictional force between the heating member and the rotation member.

Heating device, image forming apparatus, heating member and mounting method

The eyepiece optical system of the invention is characterized by comprising, in order from the display plane side on which images being viewed are formed toward the exit side, a first lens component of positive refracting power, a reflecting member having only one reflective surface, a second lens component of negative refracting power and a third lens component of positive refracting power. The lens component here means a lens block that, in an optical path involved, contacts air at only two surfaces: the display-plane-side refractive surface and the exit-side refractive surface.

Eyepiece optical system having a reflective surface and electronic view finder incorporating the same

The invention provides an imaging optical system comprising, in order from an object side to an image side thereof, a first lens group of positive refracting power, a second lens group having positive or negative refracting power and a third lens group of positive refracting power. The optical system includes an aperture stop located between an object-side surface in the first lens group and an object-side surface in the second lens group. The lens on the most object side of the first lens group and the lens on the most image side of the third lens group remain constantly fixed, and upon focusing from a far distance to a near distance, only the second lens group moves axially. The third lens group comprises a front lens subgroup of positive refracting power located on the object side and a rear lens subgroup of negative refracting power located on the image side, with the largest axial air separation in the third lens group interposed between them.

Growing community of inventors

Kanagawa, Japan

Yuki Kubota