Abstract: A rebar structure includes a plurality of column longitudinal bars to be connected to a beam. The yield point or the 0.2% proof stress of at least a portion the column longitudinal bars is larger than the yield point or the 0.2% proof stress of a normal reinforcing bar defined by JIS G 3112.

Abstract: In a light deflector including a polygon mirror having a plurality of reflecting surfaces; and a motor configured to rotate the polygon mirror, each of the reflecting surfaces, which has leading and trailing edges with respect to a direction of rotation of the polygon mirror and a center between the two edges, is configured to curve with the center displaced with respect to a reference straight line passing through the two edges in a plane perpendicular to an axis of rotation of the polygon mirror, radially, to a first side under a non-operating state in which the motor is not in operation, and to a second side (opposite to the first side) under a first rotating state in which progress of deformation of each of the reflecting surfaces has converged after a lapse of a first period of time from a start of rotation of the motor.

Abstract: In a scanning optical apparatus including a light source, a light deflector having a reflecting surface, and a single scanning lens, a light flux deflected in a main scanning direction is focused on an image surface. The reflecting and image surfaces are conjugate to each other with respect to a sub scanning direction, Bmax×Bmin>0, and Dmax×Dmin<0 where Bmax and Bmin are a maximum value and a minimum value, respectively, of paraxial focal points, Dmax and Dmin are a maximum value and a minimum value, respectively, of midpoints of focal depth in the sub scanning plane, the values being determined with reference to the image surface, wherein the value of the image surface is 0 and the values on a farther-from-the-scanning-lens side behind the image surface have positive values.

Abstract: In a light deflector including a polygon mirror having a plurality of reflecting surfaces; and a motor configured to rotate the polygon mirror, each of the reflecting surfaces, which has leading and trailing edges with respect to a direction of rotation of the polygon mirror and a center between the two edges, is configured to curve with the center displaced with respect to a reference straight line passing through the two edges in a plane perpendicular to an axis of rotation of the polygon mirror, radially, to a first side under a non-operating state in which the motor is not in operation, and to a second side (opposite to the first side) under a first rotating state in which progress of deformation of each of the reflecting surfaces has converged after a lapse of a first period of time from a start of rotation of the motor.

Abstract: In a scanning optical apparatus, an illumination optical system has a diffractive power ?dM and a refractive power ?nM in a main scanning direction, and a ratio ?nM/?dM in the main scanning direction for a focal length fi in a range of 10-22 mm satisfies: g2(fi)??nM/?dM?g1(fi), where A(Z)=(1.897×107)Z2+6744Z+0.5255, B(Z)=(2.964×107)Z2+5645Z+0.6494, C(Z)=(3.270×107)Z2+3589Z+0.5250, D(Z)=(5.016×107)Z2+4571Z+0.8139, g1(fi)=fi{D(Z)?B(Z)}/12?5D(Z)/6+11B(Z)/6, g2(fi)=fi{C(Z)?D(Z)}/12?5C(Z)/6+11A(Z)/6.

Abstract: A vehicle body drifting suppression device including a steering torque detection unit which detects a steering torque of a vehicle, wherein a vehicle body drifting suppression is performed according to a vehicle body drifting suppression control-amount, and the vehicle body drifting suppression control-amount is adjusted according to a temporal sustention status of the steering torque.

Abstract: When a stop position of a piston resulting from the automatic stop is in a range that is on an advance side of a threshold in terms of crank angle, fuel injection is performed at beginning of the automatic restart-up in the cylinder that is in the intake stroke and an ignition is performed in a subsequent initial compression stroke in the same cylinder. When the stop position of the piston resulting is in a range that is on a retard side of the threshold in terms of crank angle, initial fuel injection is performed in the cylinder that next enters an intake stroke among the cylinders of the internal combustion engine after the beginning of automatic restart-up and initial ignition is performed in a subsequent compression stroke in the same cylinder. The threshold is determined in accordance with an amount of deviation of a crank angle.

Abstract: A scanning optical apparatus includes: a light source; a light deflector configured to deflect the light beam from the light source in a main scanning direction; an incident optical system disposed between the light source and the light deflector and configured to render the light beam from the light source nearly parallel in the main scanning direction and to converge the light beam in a sub-scanning direction to bring the light beam to a focus in proximity to the light deflector; and a scanning lens configured to focus the light beam deflected by the light deflector onto a target surface to form spot-like images. The incident optical system includes one or more lenses which provide at least one refracting surface and at least one diffraction surface, and ?nS/?ds<0 is satisfied, where ?nS is a refractive power in the sub-scanning direction and ?dS is a diffraction power in the sub-scanning direction.

Abstract: In a scanning optical apparatus, an illumination optical system has a diffractive power ?dM in a main scanning direction, a diffractive power ?dS in a sub-scanning direction, a refractive power ?nM in the main scanning direction, and a refractive power ?nS in the sub-scanning direction. A ratio ?nM/?dM in the main scanning direction for a focal length fi in a range of 10-30 mm satisfies: g2(fi)??nM/?dM?g1(fi), where A(Z)=(3.532×107)Z2+3023Z+0.7010, B(Z)=(5.719×107)Z2+4169Z+0.7678, C(Z)=(1.727×107)Z2+3244Z+0.4217, D(Z)=(1.373×108)Z2+3232Z+1.224, g1(fi)=fi{D(Z)?B(Z)}/20?0.5D(Z)+1.5B(Z), g2(fi)=fi{C(Z)?D(Z)}/20?0.5C(Z)+1.5A(Z), and a ratio ?nS/?dS in the sub-scanning direction satisfies: ?nS/?dS<1.3.

Abstract: In a scanning optical apparatus including a single lens configured to convert a beam deflected by a polygon mirror into a spot-like image on a to-be-scanned surface, the lens satisfies the conditions: ?0.59<?1?0, ?0.46<?2?0.2, ?0.6?D1<0.43, and ?0.17?D2?0.16 where ?1 indicates an angle [deg] formed in a main scanning plane between a first optical axis and a reference line perpendicular to the to-be-scanned surface, ?2 indicates an angle [deg] formed in the main scanning plane between the first optical axis and a second optical axis, D1 indicates an amount of shift [mm] in the main scanning plane, of a point of intersection between the first optical axis and an incident-side lens surface, from the reference line, and D2 indicates an amount of shift [mm] in the main scanning plane, of a point of intersection between the second optical axis and an exit-side lens surface, from the first optical axis.

Abstract: An optical scanner is configured such that an anamorphic condensing lens in an incident optical system has a diffractive lens structure at least in one lens surface thereof, and a length of an optical path increased by the diffractive lens structure ? [rad] is defined by an equation below by a function of height h from an optical axis: ?(h)=M(P2·h2+P4·h4+ . . . ), where Pn is a coefficient of an nth-order term of the height h (n is an even number), and M is a diffraction order, that the lens satisfies the following relations: ?216?P2??49, 1100?P4·(hm max)4/(fm·NAm4)?3800, and 10?fm?35, where hmmax [mm] is an effective diameter in the main scanning direction, fm [mm] is a focal length in the main scanning direction, and NAm is a numerical aperture in the main scanning direction, and that a wavefront aberration WFE1 [?rms] in a first wavelength ?1 [nm] satisfies the following relation: WFE1?0.01.

Abstract: In a scanning optical apparatus, an illumination optical system has a diffractive power ?dM and a refractive power ?nM in a main scanning direction, and a ratio ?nM/?dM in the main scanning direction for a focal length fi in a range of 10-22 mm satisfies: g2(fi)??nM/?dM?g1(fi), where A(Z)=(1.897×107)Z2+6744Z+0.5255, B(Z)=(2.964×107)Z2+5645Z+0.6494, C(Z)=(3.270×107)Z2+3589Z+0.5250, D(Z)=(5.016×107)Z2+4571Z+0.8139, g1(fi)=fi{D(Z)?B(Z)}/12?5D(Z)/6+11B(Z)/6, g2(fi)=fi{C(Z)?D(Z)}/12?5C(Z)/6+11A(Z)/6.

Abstract: In a scanning optical apparatus, an illumination optical system has a diffractive power ?dM in a main scanning direction, a diffractive power ?dS in a sub-scanning direction, a refractive power ?nM in the main scanning direction, and a refractive power ?nS in the sub-scanning direction. A ratio ?nM/?dM in the main scanning direction for a focal length fi in a range of 10-30 mm satisfies: g2(fi)??nM/?dM?g1(fi), where A(Z)=(3.532×107)Z2+3023Z+0.7010, B(Z)=(5.719×107)Z2+4169Z+0.7678, C(Z)=(1.727×107)Z2+3244Z+0.4217, D(Z)=(1.373×108)Z2+3232Z+1.224, g1(fi)=fi{D(Z)?B(Z)}/20?0.5D(Z)+1.5B(Z), g2(fi)=fi{C(Z)?D(Z)}/20?0.5C(Z)+1.5A(Z), and a ratio ?nS/?dS in the sub-scanning direction satisfies: ?nS/?dS<1.3.

Abstract: In a scanning optical apparatus including a single lens configured to convert a beam deflected by a polygon mirror into a spot-like image on a to-be-scanned surface, the lens satisfies the conditions: ?0.59<?1?0, ?0.46<?2?0.2, ?0.6?D1<0.43, and ?0.17?D2?0.16 where ?1 indicates an angle [deg] formed in a main scanning plane between a first optical axis and a reference line perpendicular to the to-be-scanned surface, ?2 indicates an angle [deg] formed in the main scanning plane between the first optical axis and a second optical axis, D1 indicates an amount of shift [mm] in the main scanning plane, of a point of intersection between the first optical axis and an incident-side lens surface, from the reference line, and D2 indicates an amount of shift [mm] in the main scanning plane, of a point of intersection between the second optical axis and an exit-side lens surface, from the first optical axis.

Abstract: An electric power steering system includes an electric assist motor, a controller, a first corrector, and a second corrector. The electric assist motor is configured to assist steering according to a steering assist amount. The controller is configured to control the steering assist amount in accordance with an input steering force. The first corrector is configured to correct the steering assist amount with a correction amount in accordance with a steering torque during running on a cant road. The second corrector is configured to correct the correction amount in accordance with a steering angular velocity.

Abstract: A vehicle body drifting restraining device restraining a drifting of a vehicle body of a vehicle, the vehicle body drifting restraining device comprising: an activeness level determination unit determining an activeness level of a driver with respect to a movement of the vehicle in a longitudinal direction; and a vehicle body drifting restraining control permission/prohibition switch permitting or prohibiting a control restraining the drifting of the vehicle body, wherein the control restraining the drifting of the vehicle body is executed only when the activeness level determination unit determines that the activeness level is low.

Abstract: A rebar structure includes a plurality of column longitudinal bars to be connected to a beam. The yield point or the 0.2% proof stress of at least a portion the column longitudinal bars is larger than the yield point or the 0.2% proof stress of a normal reinforcing bar defined by JIS G 3112.

Abstract: An optical scanner is configured such that an anamorphic condensing lens in an incident optical system has a diffractive lens structure at least in one lens surface thereof, and a length of an optical path increased by the diffractive lens structure ? [rad] is defined by an equation below by a function of height h from an optical axis: ?(h)=M(P2·h2+P4·h4+ . . . ), where Pn is a coefficient of an nth-order term of the height h (n is an even number), and M is a diffraction order, that the lens satisfies the following relations: ?216?P2??49, 1100?P4·(hm max)4/(fm·NAm4)?3800, and 10?fm?35, where hmmax [mm] is an effective diameter in the main scanning direction, fm [mm] is a focal length in the main scanning direction, and NAm is a numerical aperture in the main scanning direction, and that a wavefront aberration WFE1 [?rms] in a first wavelength ?1 [nm] satisfies the following relation: WFE1?0.01.

Abstract: In a scanning optical apparatus, a third optical element is configured such that a first optical axis defined as an optical axis of an incident-side lens surface of the third optical element is inclined in a main scanning plane with respect to a normal line extending from a scanning center on a target surface to be scanned and an intersection point between the first optical axis and the incident-side lens surface is shifted with respect to the normal line, and that a second optical axis defined as an optical axis of an emission-side lens surface is inclined in the main scanning plane with respect to the first optical axis and an intersection point between the second optical axis and the emission-side lens surface is shifted with respect to the first optical axis.

Abstract: A scanning optical apparatus includes: a light source; a first optical element configured to convert light emitted from the light source into a beam of light; a second optical element configured to convert the beam of light having passed through the first optical element into a linear image extending in a main scanning direction; a deflecting mirror configured to deflect the beam of light having passed through the second optical element in the main scanning direction; and a third optical element configured to convert the beam of light having been deflected by the deflecting mirror into a spot-like image and focus it on a target surface to be scanned. The third optical element is a single lens having a pair of opposite lens surfaces, and each of the pair of lens surfaces is aspheric in a main scanning plane to satisfy the formula: ? ( 1 - S k ? ( y 1 , y 2 ) f t ? ( y 1 , y 2 ) ) · h ? ( y 1 , y 2 ) ? < r e ? min 2 .