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公开(公告)号：US11815792B2
公开(公告)日：2023-11-14
申请号：US17605717
申请日：2020-03-30
Applicant: Nittoh Inc.
Inventor： Junichi Endo
Abstract: A lens barrel is provided to be attached to a camera body that can reduce an outer diameter of a back end section of the lens barrel even when a member moving in an optical axis direction is disposed on the back end section of the lens barrel. A lens barrel includes a fixed cylinder, a lens holding frame that is disposed on an inner circumferential side of the fixed cylinder and can move in an optical axis direction relative to the fixed cylinder, a guide cylinder that is disposed on an outer circumferential side of the fixed cylinder and can move, together with the lens holding frame, in the optical axis direction relative to the fixed cylinder, and a rotary cylinder that is disposed on the outer circumferential side of the fixed cylinder and can rotate relative to the fixed cylinder. A front end section of the guide cylinder and the rotary cylinder are disposed further on a front side than a connection part that connects the lens holding frame and the guide cylinder. A power transmission mechanism is disposed between the front end section of the guide cylinder and the rotary cylinder. The power transmission mechanism converts a rotary motion of the rotary cylinder into a linear motion of the guide cylinder to cause the guide cylinder and the lens holding frame to move in the optical axis direction.
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公开(公告)号：US11550115B2
公开(公告)日：2023-01-10
申请号：US16771685
申请日：2018-11-05
Applicant: Nittoh Inc.
Inventor： Takashi Iwamoto
Abstract: A lens barrel has at least one movable lens group that can move in one direction and the other direction along the optical axis, the lens barrel comprising: a movable lens frame; a voice coil motor for driving a movable lens group and the movable lens frame along the optical axis; and a stopper mechanism brought into contact with the movable lens frame. The stopper mechanism includes a stopper member that moves between a retracted position where the stopper member does not touch the movable lens frame when the voice coil motor is energized, and an abutting position where the stopper member is brought into contact with the movable lens frame when the voice coil motor is not energized.
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公开(公告)号：US11536935B2
公开(公告)日：2022-12-27
申请号：US16956207
申请日：2018-12-26
Applicant: NITTOH INC.
Inventor： Keiichi Mochizuki
IPC: G02B15/177 , G02B13/02 , G02B27/00
Abstract: A lens system (10) for image pickup includes, in order from an object side (11), a first lens group (G1) that has negative refractive power and is fixed during focusing, a second lens group (G2) that has positive refractive power and moves during focusing, a third lens group (G3) that has positive refractive power and is fixed during focusing, and a fourth lens group (G4) that has a stop disposed on the object side, is disposed closest to an image plane side, has positive refractive power, and is fixed during focusing. The first lens group includes a first lens (L11) with positive refractive power that is disposed closest to the object side.
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公开(公告)号：US11022776B2
公开(公告)日：2021-06-01
申请号：US16326315
申请日：2017-08-03
Applicant: Nittoh Inc.
Inventor： Kohei Kaneko
Abstract: A lens barrel includes: a lens frame that holds a lens and is movable in the optical axial direction of the lens; and a moving mechanism that moves the lens frame in the optical axial direction. The moving mechanism includes: a feed screw; a drive source that rotates the feed screw; a biasing member that biases the lens frame toward direction side; a nut on the direction side of the lens frame that is screwed with the feed screw; and a low-friction member between the nut and the lens frame in the optical axial direction. At least one of a friction coefficient between the lens frame and the low-friction member or a friction coefficient between the nut and the low-friction member is smaller than a friction coefficient between the lens frame and the nut when the lens frame is in contact with the nut.
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公开(公告)号：US20210072516A1
公开(公告)日：2021-03-11
申请号：US16955415
申请日：2018-12-26
Applicant: NITTOH INC.
Inventor： Keiichi MOCHIZUKI
Abstract: A lens system (10) for image pickup includes, in order from the object side (11), a first lens group (G1) that has negative refractive power and is fixed during focusing, a second lens group (G2) that has positive refractive power and moves during focusing, a third lens group (G3) that has positive refractive power and is fixed during focusing, and a fourth lens group (G4) that has a stop disposed on the object side, is disposed closest to the image plane, has positive refractive power, and is fixed during focusing. The second lens group may include a meniscus-type single lens (L21) or cemented lens with positive refractive power that is concave on the object side.
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Patent Agency Ranking
公开(公告)号：US10908379B2
公开(公告)日：2021-02-02
申请号：US16316497
申请日：2017-06-28
Applicant: Nittoh Inc.
Inventor： Kohei Kaneko
Abstract: An imaging device is provided that includes: a lens barrel, an element holder adhesively secured to one end of the lens barrel while holding an imaging element; and an elastic body disposed between the lens barrel and the element holder. The lens barrel has formed thereon a projection projecting toward the element holder. The element holder has formed therein an insertion hole into which the projection is inserted. The elastic body is fitted to the projection with the projection inserted into an insertion hole in the elastic body. In the imaging device, an outer peripheral surface of the projection and an inner peripheral surface of the insertion hole are in contact with each other, and the element holder is in contact with the elastic body on the periphery of the insertion hole. An adhesive is filled between the projection and the insertion hole.
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公开(公告)号：US10884317B2
公开(公告)日：2021-01-05
申请号：US16467653
申请日：2017-11-22
Applicant: Nittoh Inc.
Inventor： Takafumi Hanaoka
Abstract: An optical diaphragm device includes a plurality of diaphragm blades including a first fixing boss protruding from one surface of a first planar plate toward a side in a first direction; and a moving boss protruding from another surface of the first planar plate toward a side in a second direction. The optical diagram device includes a plurality of light leakage prevention blades including a second fixing boss protruding from one surface of a second planar plate toward the side in the first direction. The optical diagram device includes a drive ring including a plurality of first cam grooves; a housing body capable of accommodating the diaphragm blades, the light leakage prevention blades, and the drive ring. A second cam groove is in the light leakage prevention blade. The moving boss is in the second cam groove, and is in the first cam groove.
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公开(公告)号：US10761415B2
公开(公告)日：2020-09-01
申请号：US15695535
申请日：2017-09-05
Applicant: NITTOH INC.
Inventor： Takahiko Matsuo
Abstract: A projection optical system (2) projects from a DMD (7) on a reducing side onto a screen (9) on an enlargement side, and includes: a first refractive optical system (10) that forms a first intermediate image (51) on the enlargement side using light incident from the reducing side; a second refractive optical system (20) that forms the first intermediate image (51) on the reducing side into a second intermediate image (52) on the enlargement side; and a first reflective optical system (30) including a first reflective surface (31a) with positive refractive power that is positioned on the enlargement side of the second intermediate image (52), wherein the second refractive optical system (20) includes a first focus lens group (61) that moves when focusing is carried out, and the first focus lens group (61) includes at least one lens (L13) included in the second refractive optical system (20).
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公开(公告)号：US20190293899A1
公开(公告)日：2019-09-26
申请号：US16316497
申请日：2017-06-28
Applicant: NITTOH INC.
Inventor： Kohei KANEKO
IPC: G02B7/02
Abstract: An imaging device is provided that includes: a lens barrel, an element holder adhesively secured to one end of the lens barrel while holding an imaging element; and an elastic body disposed between the lens barrel and the element holder. The lens barrel has formed thereon a projection projecting toward the element holder. The element holder has formed therein an insertion hole into which the projection is inserted. The elastic body is fitted to the projection with the projection inserted into an insertion hole in the elastic body. In the imaging device, an outer peripheral surface of the projection and an inner peripheral surface of the insertion hole are in contact with each other, and the element holder is in contact with the elastic body on the periphery of the insertion hole. An adhesive is filled between the projection and the insertion hole.
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公开(公告)号：US10310366B2
公开(公告)日：2019-06-04
申请号：US14972836
申请日：2015-12-17
Applicant: NITTOH INC.
Inventor： Takahiko Matsuo
IPC: G03B21/28 , G02B13/16 , G02B13/18 , G02B13/22 , G02B15/163 , G02B15/20 , G02B17/08 , G02B15/15 , G03B21/14 , H04N9/31
Abstract: There is provided a projection optical system (1) that projects from a first image plane on a reducing side to a second image plane on an enlargement side, including a first refractive optical system (11) that includes eight lenses (L1) to (L8) and forms a first intermediate image (31) on the enlargement side using light that is incident from the reducing side, a second refractive optical system (12) that includes six lenses (L9) to (L14) and forms the first intermediate image (31) on the reducing side into a second intermediate image (32) on the enlargement side, and a first reflective optical system (20) that includes a first reflective surface (21a) with positive refractive power that is positioned closer to the enlargement side than the second intermediate image (32).
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