Abstract: A method for calibrating parameters includes a measurement step that obtains measurement data by scanning a defined surface; a correction step that obtains corrected data by correcting the measurement data based on the parameters; a determination step that calculates a roundness of the corrected data and determines whether the calculated roundness is equal to or less than a predetermined value; and an adjustment step that increases or reduces at least one of the parameters when the roundness is determined to be greater than the predetermined value, and the correction step, the determination step, and the adjustment step are repeated until the roundness is determined to be equal to or less than the predetermined value.

Abstract: A roundness measuring device includes an annular ring, and a plurality of displacement sensors (comparative length measuring devices) provided on the ring at predetermined intervals. The displacement sensors are arranged such that lines along which measurement axes of the displacement sensors extend intersect at a single point.

Abstract: A lens-measuring machine includes: a table rotatable around a rotation axis; a lens holder that holds a workpiece in a form of a lens, the lens holder being placed on the table so that an optical axis of the lens becomes orthogonal to the rotation axis; a contact tip that contacts a measurement surface of the lens; an angle sensor for detecting a rotary angle of the table; a displacement detector for detecting a displacement of the contact tip; and a controller for calculating coordinates information of the measurement surface of the lens in a form of polar coordinates, whose origin is at the rotation axis, based on displacement of the contact tip for every predetermined rotary angle of the table, the controller converting the calculated polar coordinates into Cartesian coordinates.

Abstract: A method for calibrating parameters includes a measurement step that obtains measurement data by scanning a defined surface; a correction step that obtains corrected data by correcting the measurement data based on the parameters; a determination step that calculates a roundness of the corrected data and determines whether the calculated roundness is equal to or less than a predetermined value; and an adjustment step that increases or reduces at least one of the parameters when the roundness is determined to be greater than the predetermined value, and the correction step, the determination step, and the adjustment step are repeated until the roundness is determined to be equal to or less than the predetermined value.

Abstract: A threaded shaft measuring device includes a table that supports a threaded shaft to be measured, and that is capable of adjusting a rotation position about a perpendicular Z axis, adjusting a rotation position about an X axis that is horizontal and intersects with the Z axis, and adjusting a position in a Y axis direction that is horizontal and intersects with the X axis; and a stylus that performs scanning measurement of a surface of the threaded shaft. An adjustment jig capable of making contact with the threaded shaft and an elevator that brings the adjustment jig into contact with the threaded shaft are installed on the table. The adjustment jig includes an abutting bottom surface; an abutting side surface; a measurement surface; and an axis line marker that enables a tilt relative to the X axis to be detected.

Abstract: A roundness measuring machine includes: a base; a table rotatable relative to the base; a probe configured to scan a surface of a workpiece mounted on the table; a motor configured to rotate the table; and a control device configured to control a rotation of the motor. The control device includes: a starting current detector configured to detect a starting current of the motor; and an acceleration/deceleration time setting unit configured to detect at least one of acceleration time and deceleration time for the motor in accordance with the starting current. The roundness measuring machine can suitably set the acceleration time and the deceleration time for the motor corresponding to the inertia moment of the workpiece mounted on the table.

Abstract: A lens-measuring machine includes: a table rotatable around a rotation axis; a lens holder that holds a workpiece in a form of a lens, the lens holder being placed on the table so that an optical axis of the lens becomes orthogonal to the rotation axis; a contact tip that contacts a measurement surface of the lens; an angle sensor for detecting a rotary angle of the table; a displacement detector for detecting a displacement of the contact tip; and a controller for calculating coordinates information of the measurement surface of the lens in a form of polar coordinates, whose origin is at the rotation axis, based on displacement of the contact tip for every predetermined rotary angle of the table, the controller converting the calculated polar coordinates into Cartesian coordinates.

Abstract: A roundness measuring device includes an annular ring, and a plurality of displacement sensors (comparative length measuring devices) provided on the ring at predetermined intervals. The displacement sensors are arranged such that lines along which measurement axes of the displacement sensors extend intersect at a single point.

Abstract: A threaded shaft measuring device includes a table that supports a threaded shaft to be measured, and that is capable of adjusting a rotation position about a perpendicular Z axis, adjusting a rotation position about an X axis that is horizontal and intersects with the Z axis, and adjusting a position in a Y axis direction that is horizontal and intersects with the X axis; and a stylus that performs scanning measurement of a surface of the threaded shaft. An adjustment jig capable of making contact with the threaded shaft and an elevator that brings the adjustment jig into contact with the threaded shaft are installed on the table. The adjustment jig includes an abutting bottom surface; an abutting side surface; a measurement surface; and an axis line marker that enables a tilt relative to the X axis to be detected.

Abstract: A roundness measuring machine includes: a base; a table rotatable relative to the base; a probe configured to scan a surface of a workpiece mounted on the table; a motor configured to rotate the table; and a control device configured to control a rotation of the motor. The control device includes: a starting current detector configured to detect a starting current of the motor; and an acceleration/deceleration time setting unit configured to detect at least one of acceleration time and deceleration time for the motor in accordance with the starting current. The roundness measuring machine can suitably set the acceleration time and the deceleration time for the motor corresponding to the inertia moment of the workpiece mounted on the table.

Abstract: A method includes: performing a scanning measurement of a female thread along first and second axes extending along a center axis of the thread and opposed to each other across the center axis; determining characteristic values of the thread from contour data of the thread obtained through the measurement; obtaining the contour data including first contour data associated with the first axis and second contour data associated with the second axis by performing the measurement; detecting a thread displacement along the center axis between a crest associated with the first axis and a crest associated with the second axis at each of first position and second position on the center axis; calculating inclination and deviation of the first and second axes from the thread displacements detected at the first and second positions; and adjusting an attitude of the thread for the measurement to eliminate the inclination and deviation.

Abstract: A profile measuring instrument usable to perform a rotary scanning measurement and a linear scanning measurement on a workpiece in the form of a revolution solid, includes: a turntable on which the workpiece is mounted, the turntable being rotatable around a predetermined rotation axis; a rotary scanning measurement unit being adapted to measure a displacement of a surface of the workpiece mounted on the turntable; a linear scanning measurement unit being adapted to measure a profile of the surface of the workpiece mounted on the turntable along a predetermined measurement axis; and an aligning mechanism being adapted to relatively move the linear scanning measurement unit and the turntable in a direction intersecting with the measurement axis. The linear scanning measurement unit and the turntable are adjusted to relative positions at which the measurement axis passes through the rotation axis.

Abstract: A method of calibrating a surface texture measurement device includes obtaining Y-axis shape measurement data and a maximum diameter portion to obtain upper and lower maximum diameter portions of a reference sphere from Y-axis upper and lower shape data obtained by relatively moving in the Y-axis direction while a downward and an upward styluses are in contact with an upper and a lower surfaces, respectively, of the reference sphere; obtaining X-axis shape measurement data to obtain X-axis upper and lower shape data of the reference sphere by relatively moving in the X-axis direction while the downward stylus is in contact with the upper diameter portion and the upward stylus with the lower diameter portion of the reference sphere; and calculating offset amounts ?x and ?z of the upward and downward styluses from center coordinates O3 and O4 obtained from the shape data.

Abstract: A profile measuring instrument usable to perform a rotary scanning measurement and a linear scanning measurement on a workpiece in the form of a revolution solid, includes: a turntable on which the workpiece is mounted, the turntable being rotatable around a predetermined rotation axis; a rotary scanning measurement unit being adapted to measure a displacement of a surface of the workpiece mounted on the turntable; a linear scanning measurement unit being adapted to measure a profile of the surface of the workpiece mounted on the turntable along a predetermined measurement axis; and an aligning mechanism being adapted to relatively move the linear scanning measurement unit and the turntable in a direction intersecting with the measurement axis. The linear scanning measurement unit and the turntable are adjusted to relative positions at which the measurement axis passes through the rotation axis.

Abstract: A method includes: performing a scanning measurement of a female thread along first and second axes extending along a center axis of the thread and opposed to each other across the center axis; determining characteristic values of the thread from contour data of the thread obtained through the measurement; obtaining the contour data including first contour data associated with the first axis and second contour data associated with the second axis by performing the measurement; detecting a thread displacement along the center axis between a crest associated with the first axis and a crest associated with the second axis at each of first position and second position on the center axis; calculating inclination and deviation of the first and second axes from the thread displacements detected at the first and second positions; and adjusting an attitude of the thread for the measurement to eliminate the inclination and deviation.

Abstract: A surface texture measuring machine includes: a stage, a contact-type detector having a stylus, an image probe, a relative movement mechanism and a controller. The controller includes: a center position calculating unit that, when the image probe enters position data of at least three points on a circular contour of a circular concave portion or a circular convex portion of an object, approximates the entered position data to a circle to obtain a center position of the circle; and a stylus setting unit that, after calculating the center position, operates the relative movement mechanism to position the stylus of the contact-type detector at the center position.

Abstract: A method of calibrating a surface texture measurement device includes obtaining Y-axis shape measurement data and a maximum diameter portion to obtain upper and lower maximum diameter portions of a reference sphere from Y-axis upper and lower shape data obtained by relatively moving in the Y-axis direction while a downward and an upward styluses are in contact with an upper and a lower surfaces, respectively, of the reference sphere; obtaining X-axis shape measurement data to obtain X-axis upper and lower shape data of the reference sphere by relatively moving in the X-axis direction while the downward stylus is in contact with the upper diameter portion and the upward stylus with the lower diameter portion of the reference sphere; and calculating offset amounts ?x and ?z of the upward and downward styluses from center coordinates O3 and O4 obtained from the shape data.

Abstract: A surface texture measuring machine includes: a stage, a contact-type detector having a stylus, an image probe, a relative movement mechanism and a controller. The controller includes: a center position calculating unit that, when the image probe enters position data of at least three points on a circular contour of a circular concave portion or a circular convex portion of an object, approximates the entered position data to a circle to obtain a center position of the circle; and a stylus setting unit that, after calculating the center position, operates the relative movement mechanism to position the stylus of the contact-type detector at the center position.

Abstract: A jig for measuring an object shape includes a plate having a first surface and a second surface opposed to the first plate and two reference balls fixed to the plate, each ball surface being exposed on both the first and second surfaces. A reference plane is fixed to the plate, the reference plane having a first plane and a second plane that are parallel to each other, the first and second planes being exposed on the first and second surfaces of the plate, respectively. An object-holding portion is fixed to the plate, the object-holding portion having a hole passing through the plate, the object-holding portion being able to hold an object in the hole with the front and back surfaces of the object being exposed on the first and second surfaces of the plate, respectively.

Abstract: A benzylamine derivative has a structure represented by the following formula (1): In a method for optical resolution of the benzylamine derivative, optically active mandelic acid is used as an optical resolving agent. In an optical resolution step in a production method of the optically active benzylamine derivative, an optically active (S)-benzylamine derivative represented by the formula (3) is precipitated as (S)-mandelic acid salt from a solution containing the benzylamine derivative and (S)-mandelic acid: wherein Ar represents an aryl group that has 6 to 15 carbon atoms and may have a substituent, and *1 represents an asymmetric carbon atom.