Abstract: A partial spherical shape of each measurement area of a sphere to be measured, which is established so as to have an area overlapping with another measurement area adjacent to each other, is measured at each rotation position, and the surface shape is measured by joining the partial spherical shapes of the measurement areas by a stitching operation based on the shape of the overlapping area. The position at which the sphere is measured is changed and re-held. A positional displacement between half parts of the sphere before and after re-holding, which is caused by an effect of an error owing to the re-holding, is separated into three rotational components. Magnitudes of the three rotational components are quantified by image correlation and the positional displacement corrected. Then, the stitching operation is performed to measure the entire part of the sphere surface.

Abstract: In a spherical shape measurement method for measuring a surface shape, a sphere to be measured is made freely rotatable. The partial spherical shape of each measurement area, which is established so as to have an area overlapping with another measurement area adjacent to each other, is measured at each rotation position, and the surface shape is measured by joining the partial spherical shapes of the measurement areas by a stitching operation based on the shape of the overlapping area. In the state of detaching the sphere from the sphere hold mechanism to which the sphere is freely attachable and detachable, the sphere support table holds the sphere. The sphere is re-held at a different position, so that the shape of the entire sphere can be measured with high accuracy.

Abstract: There is provided a range shifter which includes a transmissive plate whose thickness has been adjusted depending on a setup value of an amount of energy to be attenuated, and a holder portion that holds the transmissive plate, wherein the thickness of the transmissive plate is adjusted to be a thickness equivalent to an attenuation amount lower than the setup value by a predetermined rate thereof; and wherein, a superimposing mechanism capable of releasably superimposing an adjustment sheet over the transmissive plate, is provided to at least one of the transmissive plate and the holder portion, the adjustment sheet being adjusted to have a thickness equal to or less than a thickness equivalent to a two-fold attenuation amount of the predetermined rate.

Abstract: There is provided a range shifter which includes a transmissive plate whose thickness has been adjusted depending on a setup value of an amount of energy to be attenuated, and a holder portion that holds the transmissive plate, wherein the thickness of the transmissive plate is adjusted to be a thickness equivalent to an attenuation amount lower than the setup value by a predetermined rate thereof; and wherein, a superimposing mechanism capable of releasably superimposing an adjustment sheet over the transmissive plate, is provided to at least one of the transmissive plate and the holder portion, the adjustment sheet being adjusted to have a thickness equal to or less than a thickness equivalent to a two-fold attenuation amount of the predetermined rate.

Abstract: A temperature-controlled bath capable of swiftly changing the temperature of a sample to a target temperature and maintaining the temperature of the sample at a fixed temperature after the temperature change is provided. A temperature-controlled bath includes a temperature changing means, a temperature-controlled chamber, a sample holding chamber, and connection cut-off means. The temperature changing means is disposed in the temperature-controlled chamber, and the temperature of the temperature-controlled chamber is adjusted by the temperature changing means. The sample holding chamber is separated from the temperature-controlled chamber by a thermally conducive wall, and contains a sample therein. The connection cut-off means change a connection between the temperature-controlled chamber and the sample holding chamber to a connected state or a cut-off state.

Abstract: An abscissa calibration jig of a laser interference measuring apparatus, includes: an image projection unit configured to project an image with a marker; a first support mechanism configured to rotatably support the image projection unit around a first rotation axis passing a predetermined rotation center; and a second support mechanism configured to rotatably support the first support mechanism around a second rotation axis crossing the first rotation axis at the rotation center.

Abstract: An particle beam therapy system comprises a scanning electromagnet for scanning a particle beam which travels in a vacuum duct so as to irradiate an irradiation object and an irradiation unit comprising a beam outlet window, wherein the irradiation unit is configured such that the vacuum duct can be divided by a flange surfacewhich is provided at a position closer to an irradiation object than a scanning electromagnet, in a case where a vacuum duct for a scanning irradiation method which is provided at a position closer to an irradiation object than the flange surface is moved so as not to overlap a beam line of the particle beam, a ride filter for a broad beam irradiation method can be provided at space where the vacuum duct for a scanning irradiation method was provided before it was moved.

Abstract: A spherical-form measuring apparatus includes a turntable 5, a holding unit 10 for holding the sphere 20, and a probe 6 for measuring a contour of a sphere part 22 of the sphere 20. The holding unit 10 includes a base part 12, a vertical holding part 14 and an inclined holding part 16 which are placed at separate positions on the base part 12. The vertical holding part 14 holds the stem part 24 of the sphere 20 with it set in a direction perpendicular to the turntable 5. The inclined holding part 16 holds the stem part 24 with it set in a direction at an angle. The vertical and inclined holding part 14, 16 are disposed such that their axial lines meet at an intersection point P and such that the distance from the point P to the vertical holding part 14 agrees with the distance from the point P to the inclined holding part 16.

Abstract: An particle beam therapy system comprises a scanning electromagnet for scanning a particle beam which travels in a vacuum duct so as to irradiate an irradiation object and an irradiation unit comprising a beam outlet window, wherein the irradiation unit is configured such that the vacuum duct can be divided by a flange surface which is provided at a position closer to an irradiation object than a scanning electromagnet, in a case where a vacuum duct for a scanning irradiation method which is provided at a position closer to an irradiation object than the flange surface is moved so as not to overlap a beam line of the particle beam, a ride filter for a broad beam irradiation method can be provided at space where the vacuum duct for a scanning irradiation method was provided before it was moved.

Abstract: A particle beam therapy system that prevents dispersion of a charged particle beam, reduction of the energy thereof, and upsizing of the system and can accurately monitor the opening shape of a multileaf collimator so as to perform high-accuracy particle beam therapy. An image-capturing unit that takes an image of an outer end of a respective downstream side face of a leaf plate is provided for each row of leaves in such a way as to be situated at a position that is at an outer side of an irradiation field; and adjusted in such a way that a foot of a perpendicular line from a viewpoint, of the image capturing unit, to the downstream side face of a leaf plate, is situated at a position that is at an inner side of the position of the outer end when the leaf plate is maximally driven in the departing direction.

Abstract: A Fizeau interferometer includes: a reference spherical surface; and a measuring apparatus including an intensity obtaining section and a form calculating section, wherein: a focal point of the reference spherical surface is aligned with a center of curvature of the spherical surface in order to set the center of curvature as a center position, and two positions equidistant from the center position are set as a start position and an end position, the intensity obtaining section obtains the intensity maps of the interferograms at n positions at equal intervals; and the form calculating section measures the form of the spherical surface using a phase analysis method in which a coefficient of the intensity maps of the interferograms at an i-th position and a coefficient of the intensity maps of the interferograms at an (n?i+1)th position have a same value.

Abstract: An abscissa calibration jig of a laser interference measuring apparatus, includes: an image projection unit configured to project an image with a marker; a first support mechanism configured to rotatably support the image projection unit around a first rotation axis passing a predetermined rotation center; and a second support mechanism configured to rotatably support the first support mechanism around a second rotation axis crossing the first rotation axis at the rotation center.

Abstract: A spherical-form measuring apparatus which efficiently measures the sphericity and the form of a sphere to be measured with use of the mechanism of a roundness measuring machine, including a turntable, a probe for measuring a contour of a sphere to be measured on an equatorial plane parallel to a surface of the turntable, associated with rotation of the turntable, and a holding unit mounted on the turntable, for holding the sphere to be measured, wherein the holding unit positions the center of the sphere to be measured on a rotational axis of the turntable, and holds the sphere to be measured so that the sphere is rotatable about an inclined axis which passes the center of the sphere and is inclined at the angle in the range of ?5 degrees-+5 degrees centered on the angle where the sine is 1?3 (1 divided by the square root of 3) against the surface of the turntable.

Abstract: There is provided a rotating irradiation apparatus that can secure as large an access floor as possible, reduce noise during the formation of an access floor, and stably operate with a simple structure. The rotating irradiation apparatus includes an irradiation device 7 that irradiates a charged particle beam, a frame 1 on which the irradiation device is mounted and which rotates the irradiation device so that a patient lying on a treatment table 8 fixed to a stationary floor surface is irradiated with the charged particle beam, a ring 10 that is rotatably held on an inner periphery of the frame, an opening/closing-type floor 20 which is provided inside the ring and of which a portion through which the irradiation device passes is openable and closable, and drive means 28 that reversely rotates the ring in synchronization with the rotation of the irradiation device so as to maintain the opening/closing-type floor horizontal.

Abstract: The objective is to obtain a particle beam therapy system that prevents dispersion of a charged particle beam, reduction of the energy thereof, and upsizing of the system and that can accurately monitor the opening shape of a multileaf collimator so as to perform high-accuracy particle beam therapy. An image-capturing unit that takes an image of an outer end of a respective downstream side face of a leaf plate is provided for each row of leaves in such a way as to be situated at a position that is at an outer side of an irradiation field; and adjusted in such a way that the base of a perpendicular from a viewpoint to the downstream side face, is situated at a position that is at an inner side of the position of the outer end when the leaf plate is maximally driven in the departing direction.

Abstract: A spherical-form measuring apparatus 10 which efficiently measures the sphericity and the form of a sphere to be measured with use of the mechanism of a roundness measuring machine, including: a turntable 14; a probe 22 for measuring a contour of a sphere to be measured on an equatorial plane parallel to a surface of the turntable 14, associated with rotation of the turntable 14; and a holding unit 24 mounted on the turntable 14, for holding the sphere to be measured 30; wherein the holding unit 24 positions the center of the sphere to be measured 30 on a rotational axis of the turntable 14, and holds the sphere to be measured 30 so that the sphere is rotatable about an inclined axis which passes the center of the sphere and is inclined at the angle in the range of ?5 degrees-+5 degrees centered on the angle where the sine is 1?3 (1 divided by the square root of 3) against the surface of the turntable 14.

Abstract: A Fizeau interferometer includes: a reference spherical surface; and a measuring apparatus including an intensity obtaining section and a form calculating section, wherein: a focal point of the reference spherical surface is aligned with a center of curvature of the spherical surface in order to set the center of curvature as a center position, and two positions equidistant from the center position are set as a start position and an end position, the intensity obtaining section obtains the intensity maps of the interferograms at n positions at equal intervals; and the form calculating section measures the form of the spherical surface using a phase analysis method in which a coefficient of the intensity maps of the interferograms at an i-th position and a coefficient of the intensity maps of the interferograms at an (n?i+1)th position have a same value.

Abstract: There is provided a rotating irradiation apparatus that can secure as large an access floor as possible, reduce noise during the formation of an access floor, and stably operate with a simple structure. The rotating irradiation apparatus includes an irradiation device 7 that irradiates a charged particle beam, a frame 1 on which the irradiation device is mounted and which rotates the irradiation device so that a patient lying on a treatment table 8 fixed to a stationary floor surface is irradiated with the charged particle beam, a ring 10 that is rotatably held on an inner periphery of the frame, an opening/closing-type floor 20 which is provided inside the ring and of which a portion through which the irradiation device passes is openable and closable, and drive means 28 that reversely rotates the ring in synchronization with the rotation of the irradiation device so as to maintain the opening/closing-type floor horizontal.