Abstract: A system, apparatus, and method of obtaining an image of a fundus. Acquiring a reference image of the fundus at a first point in time. Acquiring a target image of the fundus at a second point in time. The target imaging area may overlap with the reference imaging area. An area of the target imaging area may be less than an area of the reference imaging area. Estimating movement of the fundus may be based upon at least the target image and the reference image. Acquiring a narrow field image of the fundus. An area of the narrow field imaging area may be less than the area of the target imaging area. A position of the narrow imaging area on the fundus may be adjusted based on the estimated movement of the fundus.

Abstract: A fundus imaging apparatus comprising: position detection means for detecting a position of a pupil of an eye to be examined; wavefront detection means for detecting a wavefront of return light from the eye irradiated with light through an illumination optical system; correction means for correcting an aberration based on the detected wavefront; and determination means for determining a correction effective region of the correction means based on the detected position.

Abstract: An adaptive optics system includes an irradiation unit adapted to irradiate an object with measurement light via a spatial light modulator; a detection unit adapted to detect a wavefront of return light from the object by a microlens array in which a plurality of microlenses are arranged; an acquisition unit adapted to acquire, based on the wavefront detected by the detection unit, correction data for correcting the wavefront by phase wrapping in the spatial light modulator; and a control unit adapted to perform control such that a wavefront discontinuous part formed by the phase wrapping determined by the correction data is held at not less than a predetermined distance from a center of each of the microlenses in the microlens array.

Abstract: An adaptive optical imaging system for imaging an object including a first polarization sensitive spatial light phase modulator and a second polarization sensitive spatial light phase modulator and a polarization adjustment device that converts the polarization of light that has passed through the first modulator before it irradiates the object and converts the polarization of the reflected light before it passes through the second modulator.

Abstract: A current regulation method of multiple beams includes acquiring a current density distribution; selecting at least one beam whose current density is equal to or more than a threshold; measuring a current value of the at least one beam respectively by varying a voltage applied to the Wehnelt electrode and acquiring a correlation between the voltage and the current value; moving a stage to a position where the at least one beam is allowed to enter a current detector each time writing of a stripe region is completed; measuring, after moving the stage, a current value of the at least one beam while beams of the multiple beams whose current density is less than the threshold are blocked; operating a target voltage value applied to the Wehnelt electrode to cause the current value measured to be a target current value; and applying the target voltage value to the Wehnelt electrode.

Abstract: In a fuel injection valve support structure which can apply a substantially constant set load, the fuel injection valve has first and second load receiving portions, the first load receiving portion being supported on the engine, the second load receiving portion being supported on an elastic support member which receives a set load from a fuel supply cap. The elastic support member includes a base plate placed on the second load receiving portion, and an elastic piece curving rearward from one end toward the other end of the base plate, with an apex portion in pressure contact with the cap, the base plate has a portion overhanging from the second load receiving portion and supporting a tip end portion of the elastic piece. The overhang portion starts bending when a load the overhang portion receives from the cap through the elastic piece reaches or exceeds a predetermined value.

Abstract: An apparatus for measuring a fundus of a subject. The apparatus includes a focusing unit which adjusts a defocus of the apparatus. The focusing unit includes a first focusing mirror and a second focusing mirror. The first focusing mirror and second focusing mirror are arranged so that an incident beam from the light source entering the focusing unit and an emitted beam exiting the focusing unit are substantially parallel to each other. Adjustment of the defocus is accomplished by moving both first focusing mirror and second focusing mirror such that incident beam and emitted beam remain substantially parallel to each other. The apparatus includes a wavefront sensor for detecting a shape of a wavefront. The apparatus includes a wavefront correction device. The wavefront correction device adjusts a wavefront of the light from the light source based on the shape of the wavefront detected by the wavefront sensor.

Abstract: A vehicle seat is provided in which a pressure-receiving member receiving the back of an occupant through an upper linking wire is supported on a seat back frame of a seat back, and an abutment member is provided on the pressure-receiving member, the abutment member restricting an amount of flexing of the pressure-receiving member by abutting against the upper linking wire when the amount of flexing exceeds a predetermined amount. This enables the amount of flexing of the pressure-receiving member for supporting the back of the occupant to be restricted, thereby stabilizing the support of the occupant.

Abstract: A cathode obtaining method includes producing a plurality of cathodes each including an electron emission member and a cover part, provided with a gap, which covers a side surface of the electron emission member, measuring an outer dimension of the upper surface of the electron emission member, for each of a plurality of cathodes, measuring an outer dimension of the gap at the same surface as the upper surface of the electron emission member, for each of a plurality of cathodes, calculating an area ratio by dividing the area of the gap, for each of a plurality of cathodes, obtaining an upper limit of the area ratio corresponding to a desired brightness by using a correlation between brightness and the area ratio, and selecting a cathode having the area ratio less than or equal to the upper limit from a plurality of cathodes that have been produced.

Abstract: In a fuel injection valve support structure which can apply a substantially constant set load, the fuel injection valve has first and second load receiving portions, the first load receiving portion being supported on the engine, the second load receiving portion being supported on an elastic support member which receives a set load from a fuel supply cap. The elastic support member includes a base plate placed on the second load receiving portion, and an elastic piece curving rearward from one end toward the other end of the base plate, with an apex portion in pressure contact with the cap, the base plate has a portion overhanging from the second load receiving portion and supporting a tip end portion of the elastic piece. The overhang portion starts bending when a load the overhang portion receives from the cap through the elastic piece reaches or exceeds a predetermined value.

Abstract: A fundus imaging apparatus comprising: position detection means for detecting a position of a pupil of an eye to be examined; wavefront detection means for detecting a wavefront of return light from the eye irradiated with light through an illumination optical system; correction means for correcting an aberration based on the detected wavefront; and determination means for determining a correction effective region of the correction means based on the detected position.

Abstract: A cathode obtaining method includes producing a plurality of cathodes each including an electron emission member and a cover part, provided with a gap, which covers a side surface of the electron emission member, measuring an outer dimension of the upper surface of the electron emission member, for each of a plurality of cathodes, measuring an outer dimension of the gap at the same surface as the upper surface of the electron emission member, for each of a plurality of cathodes, calculating an area ratio by dividing the area of the gap, for each of a plurality of cathodes, obtaining an upper limit of the area ratio corresponding to a desired brightness by using a correlation between brightness and the area ratio, and selecting a cathode having the area ratio less than or equal to the upper limit from a plurality of cathodes that have been produced.

Abstract: Provided is an ocular optical system, which permits a measuring beam scanned by two scanning units disposed close to each other to enter an anterior ocular segment of an eye to be inspected and to irradiate a fundus. The ocular optical system includes an optical unit which is disposed at a position of an intermediate image, which is optically conjugate to the fundus, and has a surface having different optical powers corresponding to scan directions of the two scanning units.

Abstract: In an electromagnetic fuel injection valve including a magnetic coil housing (31) having a coil assembly (28) housed therein, the coil housing (31) includes the first and second coil housing half bodies (31a, 31b) whose cross sections are each shaped like an inferior arc, and which are oppositely disposed so as to interpose the coil assembly (28) and a coupler (34), each of the coil housing half bodies (31a, 31b) includes: a barrel portion (44) for covering an outer peripheral surface of the coil assembly (28); a front-end wall portion (45) and a rear-end wall portion (46) which are in contact with front-end and rear-end surfaces of the coil assembly (28); a front connection cylindrical portion (47) welded to the outer peripheral surface of the magnetic cylindrical body (4); and a rear connection cylindrical portion (48) welded to the outer peripheral surface of the fixed core (5); both the coil housing half bodies are formed symmetrically; and one half part and the other half part of each of the coil housing

Abstract: An adaptive optical apparatus comprising: a shielding unit configured to shield diffracted light that is generated at an aberration correction unit that is irradiated with returning light, wherein the returning light returns from an object to be examined that is irradiated with light; a detection unit configured to detect an aberration of the returning light through an aperture of the shielding unit; and a control unit configured to control the aberration correction unit based on a detection result of the detection unit.

Abstract: An adaptive optical apparatus includes a wavefront correction unit configured to correct a wavefront aberration, a first scanning unit configured to be arranged to be optically almost conjugate to the wavefront correction unit, and scan light on an object in a first direction, a second scanning unit configured to be arranged to be optically almost conjugate to the wavefront correction unit, and scan light on the object in a second direction perpendicular to the first direction, and an optical element arranged in an optical path between the wavefront correction unit and the first scanning unit and arranged in an optical path between the first scanning unit and the second scanning unit.

Abstract: Provided is an optical tomographic imaging apparatus that can suppress variations of resolution, sensitivity, and the like and reduce the number of components for equalizing optical properties so that cost can be reduced, in a case of an OCT apparatus using a plurality of lights. The optical tomographic imaging apparatus for obtaining a tomographic image of an object includes an optical property adjusting unit for adjusting an optical property of at least one light of measurement lights, reference lights, and interference lights each comprised of a plurality of lights. The optical property adjusting unit is shared by each group including measurement lights having substantially the same distance from an optical axis of an irradiation optical system among the measurement lights comprised of a plurality of lights.

Abstract: A vehicle seat is provided in which a pressure-receiving member receiving the back of an occupant through an upper linking wire is supported on a seat back frame of a seat back, and an abutment member is provided on the pressure-receiving member, the abutment member restricting an amount of flexing of the pressure-receiving member by abutting against the upper linking wire when the amount of flexing exceeds a predetermined amount. This enables the amount of flexing of the pressure-receiving member for supporting the back of the occupant to be restricted, thereby stabilizing the support of the occupant.

Abstract: In a stern tube sealing device, slurry contained in outboard water is suppressed from depositing on sliding portions between a wall surface of a seal ring chamber or an outer peripheral surface of a propeller shaft and a sealing surface of a seal ring. A first seal ring (121) is arranged in a first seal ring chamber (111), and a second seal ring (122) is arranged in a second seal ring chamber (112) which is formed at an inboard side of the first seal ring chamber. The first seal ring chamber and the second seal ring chamber are in communication with each other through the sliding portions between a wall surface of the first seal ring chamber and a sealing surface (121a) of the first seal ring. Outboard water is filled into the first seal ring chamber, and clear water is filled into the second seal ring chamber.

Abstract: An adaptive optics system includes an irradiation unit adapted to irradiate an object with measurement light via a spatial light modulator; a detection unit adapted to detect a wavefront of return light from the object by a microlens array in which a plurality of microlenses are arranged; an acquisition unit adapted to acquire, based on the wavefront detected by the detection unit, correction data for correcting the wavefront by phase wrapping in the spatial light modulator; and a control unit adapted to perform control such that a wavefront discontinuous part formed by the phase wrapping determined by the correction data is held at not less than a predetermined distance from a center of each of the microlenses in the microlens array.