Abstract: An apparatus for measuring a shape of an eyeglass frame, includes: a tracing stylus moving unit that includes a tracing stylus detecting a position of a rim of the frame in a moving radius direction and in a vertical direction, a tracing stylus shaft for the tracing stylus, a holding unit configured to vertically-movably hold the tracing stylus shaft, a vertical direction moving unit for moving the holding unit in the vertical direction, and a moving radius direction moving unit for moving the holding unit in the moving radius direction so that the tracing stylus traces the rim; a vertical position detection unit for detecting a position of the tracing stylus in the vertical direction; and a controller for obtaining a next measurement position of the holding unit in the vertical direction based on the detecting result of the vertical position detection unit, and controls the vertical direction moving unit.

Abstract: A method of determining parameters for fitting an ophthalmic lens to a frame, including the following steps: providing an eyeglass frame including at least one temple portion having a bezel intended to enable the nesting of an ophthalmic lens; and determining the shape of the profile of the bezel at a point in the temple portion of said frame. Associated method of fabricating an ophthalmic lens.

Abstract: A spectacle measuring tool (1) includes a front plate (2) attached to a spectacle frame, and a pair of left and right side plates (40A, 40B) formed on the two, left and right edges of the front plate (2) to extend backward. The front plate (2) includes an interpupillary distance measuring portion (A) and a fitting point height measuring portion (B), and is attached to the spectacle frame such that a height adjusting device (30) can adjust its height. The side plates (40A, 40B) include a pair of left and right pressing/adjusting devices (60) which adjust the side plates (40A, 40B) to be parallel to the temples of the spectacle frame. The pressing/adjusting devices (60) press against the face side portions of a subject using threaded rods (62).

Abstract: A shape measuring apparatus for eyeglass element is configured to three-dimensionally measure an inner circumferential contour shape of an eyeglass element. The apparatus includes a holder which holds the eyeglass element; a measuring element which traces a shape of the eyeglass element; a driver for the measuring element; a position detector which detects a position of the measuring element; an arithmetic controller which processes positional data on the measuring element and controls the driver to slide the measuring element, a moving amount detector which detects a moving amount of the measuring element per unit time when the measuring element moves towards the eyeglass element; and a movement controller which controls the measuring element to move at a desirable speed which corresponds to the moving amount per unit time detected by the moving amount detector.

Abstract: An appliance for reading a rim (110) or a half-rim of an eyeglass frame, includes holder elements for holding the eyeglass frame and a feeler (10) that is mounted to turn about an axis of rotation (A1) in order to follow a longitudinal profile (P1) of the rim or half-rim of the eyeglass frame held in the holder elements. The feeler is fitted with a reader head (12) including a V-shaped bearing shoe (15) that is open in a direction facing away from the axis of rotation and that is adapted to be engaged on the rim or half-rim in order to slide therealong.

Abstract: The present invention relates to an ophthalmic holding mechanism for holding an eyeglass frame. The holding mechanism includes a base, a clamping mechanism configured for releasably securing a lens mount of an eyeglass frame, and an actuator operatively associated with the clamping mechanism for causing linear and rotational movement thereof. The clamping mechanism is moveably coupled to the base for linear and rotational movement about an axis of rotation relative to the base, wherein the clamping mechanism is rotatable about first and second spaced pivot points. The present invention also relates to a method of tracing a lens mount of an eyeglass frame.

Abstract: An eyeglass frame shape-measuring apparatus is provided in which deformation of the frame shape is determined at each measurement point based on the actual measurement values and even in the case where the frame shape changes in a direction that differs from prediction, measurement of the lens frame shape of the eyeglass frame can be performed precisely, the eyeglass frame shape-measuring apparatus that measures a shape of a lens frame of an eyeglass frame includes a feeler 37 for a lens frame, a drive motor 6 and a control device (FIG.

Abstract: The apparatus (10) comprises a turret (50), rotatable about a first axis (B-B?), a slide (52) mounted on the turret (50) and a sensor (30) mounted for sliding in the slide (52) along a third axis (C-C?) substantially parallel to the first axis (B-B?). It comprises means (34) for displacement of the sensor for displacing a contact surface (42) of the sensor along the mount (14) during the sensing of the mount. The displacement means (34) comprise means (70) for driving the turret (50) in rotation about the first axis (B-B?). The apparatus comprises control means (82) for controlling means (72) for displacement of the turret in a plane perpendicular to the first axis (B-B?) and suitable for displacing the turret (50) in said plane when the turret is driven in rotation about the first axis (B-B?) during the sensing of the mount.

Abstract: A lens shape measuring method includes: bringing a feeler into contact with an outer peripheral surface of a spectacle lens, the outer peripheral surface corresponding to a lens shape of spectacles, the feeler being rotatable about a rotation axis and movable forward and backward relative to the rotation axis in a radial direction, and, while keeping the contact state, moving the feeler along a contact surface of the feeler with the lens shape in a circumferential direction, to measure radii ?i (i=0, 1, 2, . . . n) of the lens shape over an entire circumference of thereof, the radii ?i representing change in distance from a geometric center of the lens shape to the feeler, a measurement region of the lens shape being divided into multiple sub-regions, and within each of the sub-regions, the rotation axis line being moved to a position to cause the feeler to measure the lens shape within the sub-region.

Abstract: A method for determining the shape of the bevel of an ophthalmic lens so as to have the ophthalmic lens fit a given spectacle frame, the method comprising the steps of: providing the three-dimensional (xi, yi, zi) internal profile of the groove of at least a rim of the spectacle frame expressed in the principal axes (Xf, Yf, Zf) of the spectacle frame and the length Pf of the periphery of the groove of the rim, providing the blocking point of the ophthalmic lens and the horizontal direction Xl of the ophthalmic lens, projecting the three-dimensional (xi, yi, zi) internal profile of the groove of the rim on the front face surface of the ophthalmic lens so as to obtain a three-dimension projected groove shape (xp, yp, zp), modifying the coordinates of each point of the two-dimensional groove shape (xp, yp) based on two correction coefficient, Rx for the coordinate xp and Ry for the coordinate yp, with Rx+Ry=1 so as to have the length Pp of the three-dimensional groove projected shape (xp, yp, zp) equal to the l

Abstract: The invention relates to a method for measuring the curve of a spectacle frame (4) comprising the following operations: determining the position of a first reference mark (18) defining the mid plane of the spectacle frame (4); determining the position of a second reference mark (20) defining the orientation of a spectacle lens holder relative to said mid plane; and measuring the angle between said first and second reference marks. The invention also relates to a device for carrying out the method.

Abstract: A method for providing data regarding a given primary eyewear to a remote data processing center where the data is processed to yield production instructions for producing a clip-on for the primary eyewear. The production instructions are provided to one or more remote production units. Preferably, the site providing data regarding the primary eyewear and the site for producing the secondary eyewear object are the same site.

Abstract: A method of preparing an ophthalmic lens for mounting in a surround of an eyeglass frame, the surround presenting a generally profiled shape with an inside face provided with a first engagement ridge or groove and lying between a rear margin for being turned towards the face of the wearer of the eyeglass frame and an opposite front margin, the method including: acquiring the three-dimensional shape of an acquired longitudinal profile running along the inside face; and shaping the ophthalmic lens so as to form on its edge face a second engagement ridge or groove extending along a deduced longitudinal profile of three-dimensional shape calculated as a function of the shape of the acquired longitudinal profile. The method further includes acquiring a geometrical characteristic that relates to the position of the engagement ridge or groove relative to the front and/or rear margin of the frame, the shape of the deduced longitudinal profile then also being calculated as a function of the geometrical characteristic.

Abstract: A shape measuring apparatus for eyeglasses which measures a contour shape of an eyeglass element includes: a holder which holds the eyeglass element; a holder swing mechanism which swings the holder around a virtual rotational axis which is set outside of the shape measuring apparatus for eyeglasses; a measuring element which traces a surface of the eyeglass element; a driver which drives the measuring element; a position detector which detects a position of the measuring element; and a controlling-calculating section which controls the driver and obtains and processes position information of the measuring element by the position detector, wherein, in a state of holding the eyeglass element by the holder, the controlling-calculating section controls the driver to slide the measuring element on the surface of the eyeglass element, so that the measuring element traces a three-dimensional shape of the eyeglass element and the three-dimensional shape of eyeglass element is obtained based on information of a drivi

Abstract: The correction method includes searching for one or more anomalous zones (S1, S2), if any, of the sensed curve (19), and if one or more anomalous zones are found, correcting the shape of each anomalous zone of the sensed curve.

Abstract: To provide a calibration jig which can perform three-dimensional calibration of measurement errors in a spectacle frame shape measuring apparatus. The calibration jig (30) is used for calibrating measurement errors of the spectacle frame shape measuring apparatus for measuring a shape of a spectacle frame, etc. A trace groove traced by a measuring probe of the spectacle frame shape measuring apparatus is a frame groove (20) formed in an inner circumference of rims (2A and 2B) of the spectacle frame and provided for engaging with the bevel of a spectacle lens. The rims are secured to a frame body (31) having rigidity higher than that of the rim. The frame groove has a displacement r in the radial direction, a displacement ? in the rotational direction, and a displacement z in the height direction.

Abstract: An eyeglass frame shape measuring apparatus comprises: a frame holding unit which holds a eyeglass frame in a desired position; a rotary base; a feeler holding unit which comprises a support shaft to which a feeler for measurement is attached, a first arm for holding the support shaft, an elastic body for urging the first arm so that the support shaft is urged outward with respect to a rotation center axis of the rotary base, and a first arm holding unit for holding the first arm to enable the support shaft to be inclined with respect to the rotation center axis; a detecting unit which detects movement of the first arm; and an arithmetic unit which obtains a three-dimensional movement position of the feeler to obtain the three-dimensional shape of the rim, on the basis of rotation of the rotary base and results of detection of the detecting unit.

Abstract: A spectacle lens frame shape measuring apparatus includes a holding device including upper pins and lower pins respectively holding upper rims and lower rims of frames for a spectacle lens, the upper pins holding the frames at different positions in a right-left direction from the positions at which the lower pins hold the frames and being placed at a same height as the lower pins in a vertical direction, a probe brought into contact with lens fitting grooves of the frames held by the holding device, a swinging mechanism swinging the holding device around a predetermined virtual axis, and a calculation controller calculating an axial shift amount or angle of the frames held by the holding device on the basis of a carved angle of the frames and an inclination angle of any one of the upper and lower rims, and correcting a shape of the frames obtained by the probe in accordance with the calculated axial shift amount or angle.

Abstract: A method of reading the outline of the bezel of a rim of an eyeglass frame, includes contacting the bottom of the bezel and a feeler finger (9) belonging to a feeler (8) and pointing along a feeler axis (C) or with a feeler blade belonging to a feeler and extending in a feeler plane, and moving the feeler along the bezel In order to feel the bottom of the bezel by turning about an axis of rotation. The invention, the feeler blade or finger, at least when located in a temple zone of the rim of the frame, points obliquely towards the rim of the frame and towards its rear side that is to be placed facing the eyes of a wearer, such that its feeler axis or its feeler plane forms a non-zero feeler angle (A1) with a plane orthogonal to the axis of rotation of the feeler.

Abstract: An eyeglass frame measurement apparatus includes: a measurement unit which includes a tracing stylus to be inserted into a groove of a rim of an eyeglass frame, a moving mechanism for moving the tracing stylus along the groove of the rim, and a detector for detecting movement of the tracing stylus, and obtains three-dimensional shape of the rim based on a detected result by the detector; and a holding unit which includes upper and lower sliders for positioning the frame, left and right clamp pins for clamping the rim and left and right contact portion to be contacted with the rim which is clamped by the clamp pins, and holds the frame fixedly. The left and right clamp pins and the contact portions protrude from each of the upper and lower sliders. Each of the contact portions is formed at the periphery of each of the clamp pins.

Abstract: A shape measuring apparatus for eyeglass element is configured to three-dimensionally measures an inner circumferential contour shape of an eyeglass element. The apparatus includes a holder which holds the eyeglass element; a measuring element which traces a shape of the eyeglass element; a driver for the measuring element; a position detector which detects a position of the measuring element; an arithmetic controller which processes positional data on the measuring element and controls the driver to slide the measuring element, a moving amount detector which detects a moving amount of the measuring element per unit time when the measuring element moves towards the measuring element; and a movement controller which controls the measuring element to move at a desirable speed which corresponds to the moving amount per unit time detected by the moving amount detector.

Abstract: A shape measuring apparatus for eyeglasses which measures a contour shape or an eyeglass element includes: a holder which holds the eyeglass element; a holder swing mechanism which swings the bolder around a virtual rotational axis which is set outside of the shape measuring apparatus for eyeglasses; a measuring element which traces a surface of the eyeglass element; a driver which drives the measuring element; a position detector which detects a position of the measuring element; and a controlling-calculating section which controls the driver and obtains and processes position information of the measuring element by the position detector, wherein, in a state of holding the eyeglass element by the holder, the controlling-calculating section controls the driver to slide the measuring element on the surface of the eyeglass element, so that the measuring element traces a three-dimensional shape of the eyeglass element and the three-dimensional shape of eyeglass element is obtained based on information of a drivi

Abstract: An eyeglass frame shape-measuring apparatus is provided in which deformation of the frame shape is determined at each measurement point based on the actual measurement values and even in the case where the frame shape changes in a direction that differs from prediction, measurement of the lens frame shape of the eyeglass frame can be performed precisely, the eyeglass frame shape-measuring apparatus that measures a shape of a lens frame of an eyeglass frame includes a feeler 37 for a lens frame, a drive motor 6 and a control device (FIG.

Abstract: Contour reading device, in particular for eyeglass frame rims, including a carrier axis (A) projecting transversely to the surface of a turntable (6), a carrier arm (18) which is mounted at one end to turn about the carrier axis (A) and at the other end of which a feeler (8) is mounted, whereby the feeler (8) is mobile relative to the turntable (6) along a circular arc path centered on the carrier axis (A).

Abstract: The apparatus (10) comprises a turret (50), rotatable about a first axis (B-B?), a slide (52) mounted on the turret (50) and a sensor (30) mounted for sliding in the slide (52) along a third axis (C-C?) substantially parallel to the first axis (B-B?). It comprises means (34) for displacement of the sensor for displacing a contact surface (42) of the sensor along the mount (14) during the sensing of the mount. The displacement means (34) comprise means (70) for driving the turret (50) in rotation about the first axis (B-B?). The apparatus comprises control means (82) for controlling means (72) for displacement of the turret in a plane perpendicular to the first axis (B-B?) and suitable for displacing the turret (50) in said plane when the turret is driven in rotation about the first axis (B-B?) during the sensing of the mount.

Abstract: The method includes acquiring at least one geometrical characteristic of the section, which includes: a step of reading from a register (201) in which each entry is associated with an eyeglass frame model or category of models and includes at least one geometrical characteristic of at least one section of a rim of frames of the model or the category of models of frame, with a search for an entry corresponding to the model or to the category of eyeglass frame models to which the selected eyeglass frame belongs; and a step of reading the at least one geometrical characteristic from the corresponding entry, if a corresponding entry is found in the register.

Abstract: A contour reading method for an item such as an eyewire for spectacles, the method using an appliance including a support for holding the item, and a rotary platform which is rotatably mounted in relation to the support about a rotational axis and carries a reading sub-set provided with a sensor consisting of a finger and a rod, the finger having a distal end. The distal end is displaced along the contour and successive positions thereof are detected. The method is characterized in that the displacement step includes a measuring step wherein the effort exerted between the platform and the rod is measured parallel to the rod, and a control step wherein the distance between the finger and the platform is controlled according to the effort in such a way that the intensity of the effort remains lower than a pre-determined threshold.

Abstract: An eyeglass frame shape measuring apparatus comprises: a frame holding unit which holds a eyeglass frame in a desired position; a rotary base; a feeler holding unit which comprises a support shaft to which a feeler for measurement is attached, a first arm for holding the support shaft, an elastic body for urging the first arm so that the support shaft is urged outward with respect to a rotation center axis of the rotary base, and a first arm holding unit for holding the first arm to enable the support shaft to be inclined with respect to the rotation center axis; a detecting unit which detects movement of the first arm; and an arithmetic unit which obtains a three-dimensional movement position of the feeler to obtain the three-dimensional shape of the rim, on the basis of rotation of the rotary base and results of detection of the detecting unit.

Abstract: A method of reading the outline of the bezel of a rim of an eyeglass frame, includes the steps of putting a feeler into contact against the bezel and of feeling the bezel by sliding or running the feeler along the bezel, the feeler being actuated by actuator elements along at least a first axis normal to the general plane of the rims of the frame. According to the invention, the overall force delivered by the actuator elements varies continuously or in step during reading as a function of the position of the feeler along the first axis.

Abstract: A method of reading the outline of the bezel of a rim of an eyeglass frame, includes contacting the bottom of the bezel and a feeler finger (9) belonging to a feeler (8) and pointing along a feeler axis (C) or with a feeler blade belonging to a feeler and extending in a feeler plane, and moving the feeler along the bezel in order to feel the bottom of the bezel by turning about an axis of rotation. The invention, the feeler blade or finger, at least when located in a temple zone of the rim of the frame, points obliquely towards the rim of the frame and towards its rear side that is to be placed facing the eyes of a wearer, such that its feeler axis or its feeler plane forms a non-zero feeler angle (A1) with a plane orthogonal to the axis of rotation of the feeler.

Abstract: A method of reading the outline of the bezel of a rim of an eyeglass frame, includes the steps of putting a feeler into contact against the bezel and of feeling the bezel by sliding or running the feeler along the bezel, the feeler being actuated by actuator elements along at least a first axis normal to the general plane of the rims of the frame. According to the invention, the overall force delivered by the actuator elements varies continuously or in step during reading as a function of the position of the feeler along the first axis.

Abstract: An apparatus (3) for determining centering data for eyeglasses (2) comprises a fixation device (5) and a recording unit (4) that can be triggered by a computer, records electronic images, and is disposed behind a divider element (8). The fixation device (5) produces at least one speckle pattern. The speckles can be superposed by different patterns, for example, a cross shape. The invention further relates to a method for determining centering data. The inventive method and apparatus allow to measure for test persons having the most different acuity of vision the relative centering data from a short distance while maintaining their usual posture.

Abstract: Some demonstrative embodiments of the invention include devices and/or methods of measuring a personalized lens-orientation value for a spectacle frame supporting a pair of lenses. The device, according to some demonstrative embodiments, may include a pair of orientation-measuring mechanisms, each mechanism adapted to measure a value corresponding to an orientation of a surface of a respective one of the lenses relative to a reference axis. The device may also include an adjustable positioning mechanism to adjust a distance between the pair of orientation-measuring mechanisms according to an inter-pupil distance of the user. Other embodiments are described and claimed.

Abstract: The difference in optical performance, such as astigmatism, the radius of curvature of a first surface, etc., of left and right lenses is kept at or below a specific level, and the difference in optical performance and the radius of curvature of the first surfaces between new and old lenses when the wearer changes lenses is also kept at or below a specific level, the result being lenses that are more comfortable to wear and are more attractive.

Abstract: To provide a template holder in which parts such as screws for mounting a template to a template mounting member is not lost. A template holder, in which in a state in which an elastic strut 94 is inserted into a holding hole 81 of a template 80, the template 80 is pressed and is caused to abut upon an end surface 91b of a base member 91a by the elastic strut 94 by operating a pressing strut 95, whereby while the template 80 is mounted to a holding member 91, the holding member 91 is departed from the template 80 by operating the pressing strut 95 to thereby enable the template 80 to be removed from the elastic strut 94 and the holding member 91, wherein the pressing strut 95 and the elastic strut 94 are held by the holding member 91 when the template 80 is attached and detached.

Abstract: A measurement instrument for establishing an angle by which each lens-mounting rim of a spectacles frame having two lens-mounting rims joined by a spectacles bridge is tilted in a horizontal plane in front of an eye of a spectacles wearer comprises a supporting plate onto which a spectacles frame can be positioned with the upper or lower outside edges of the lens-mounting rims downward; a marking line on the surface of the supporting plate for alignment of the spectacles frame; and at least one adjustable means permitting measurement of an angle between an imaginary line connecting a nasal and a temporary edge of a lens-mounting rim and the marking line.

Abstract: A length measure apparatus and the method for measuring transform an image from a lens set into a digital contrast image via a central processing unit. The CPU has multiple standard lines that are previously set therein. Multiple movement controllers control a movement of a selected standard line from the CPU relative to the digital contrast image. A movement value is output when the selected standard line flushes with a profile of the contrast image. The measure value is shown on a monitor when the CPU contrasts the movement of the selected standard line.

Abstract: A spectacle frame shape measuring apparatus includes a measurement element holding mechanism. The measurement element holding mechanism holds a measurement element in a substantially loadless state along a frame groove formed in the inner circumferential surface of a rim of a spectacle frame. The measurement element holding mechanism includes a rod, balance spring, and evacuating mechanism. The rod is vertically movable and has an upper end portion on which the measurement element is mounted. The balance spring pushes the rod upward to hold the measurement element at a loading position during shape measurement. The evacuating mechanism regularly evacuates the measurement element to an evacuation position, thereby performing three-dimensional measurement of a rim shape. A spectacle frame shape measuring apparatus holder is also disclosed.

Abstract: An optical non-contact method of reading the three-dimensional shape of a profile in accordance with the luminous section principle consists of scanning the profile with a plane light beam intersecting the profile transversely, simultaneously reading the trace of the plane light beam on the profile by means of an optical receiver having an optical pointing axis at a constant non-zero pointing angle to the light beam at a series of positions along the profile, and deducing the three-dimensional shape of the profile from the readings effected at these various positions. On each reading, the light beam whose trace on the profile is read by the optical receiver is chosen from a plurality of predefined light beams which can be activated alternately. The non-contact optical reading method is particularly suitable for reading the three-dimensional shape of the inside edge of a spectacle frame rim, known as the bezel. A specific device is used to implement the method in this particular application.

Abstract: Apparatus for orienting a pair of framed eyeglasses relative to an electronic scanner whereby the scanner then generated digital data defining the geometry of the frame. This data is entered into a computer to cause it to control a milling machine which shapes a blank to form a filter lens for an accessory that clips onto the frame and has a matching geometry.

Abstract: A lens shape measuring apparatus is disclosed, which is capable of identifying a size of an outer-diameter shape of a lens fixing jig by using a measuring element also used for measuring a lend shape. This lens shape measuring apparatus comprising: a lens fixing jig installed in an eyeglass lens to be processed to clamp the eyeglass lens; a lens rotation shaft for clamping and rotating the lens to be processed; a measuring element abutted on a refracting surface of the lens clamped by the lens rotation shaft; a measuring element position switching mechanism for controlling rotation of the measuring element around a rotation shaft roughly parallel to the lens rotation shaft; and a measuring unit for measuring a moving distance of the measuring element in a direction roughly parallel to the lens rotation shaft.

Abstract: A lens frame shape measuring apparatus wherein a contact element 216 supported by a contact element moving mechanism is brought into abutment against a groove formed in an inner peripheral surface of a lens frame LF (RF) of a glasses frame MF and is moved along the said groove to measure the shape of the lens frame 272 by a moving position of the contact element 216, the apparatus comprising a radius vector measuring means 217 for detecting a moving distance of the contact element 216 when the contact element is moved from a movement start position P1 at the center of the lens frame 272 up to a central position Rm1 in the right and left direction of a lower rim 272a of the lens frame 272 and is brought into contact with the lower rim 272a, and a measurement control means which identifies a lens frame shape of the glasses frame MF by the moving distance detected by the radius vector measuring means 217 and which controls a contact measurement state of the contact element 216 for the lens frame 272 in accordanc

Abstract: A spectacle frame shape measuring apparatus includes a measurement element holding mechanism. The measurement element holding mechanism holds a measurement element in a substantially loadless state along a frame groove formed in the inner circumferential surface of a rim of a spectacle frame. The measurement element holding mechanism includes a rod, balance spring, and evacuating mechanism. The rod is vertically movable and has an upper end portion on which the measurement element is mounted. The balance spring pushes the rod upward to hold the measurement element at a loading position during shape measurement. The evacuating mechanism regularly evacuates the measurement element to an evacuation position, thereby performing three-dimensional measurement of a rim shape. A spectacle frame shape measuring apparatus holder is also disclosed.

Abstract: A measurement instrument for establishing an angle by which each lens-mounting rim of a spectacles frame having two lens-mounting rims joined by a spectacles bridge is tilted in a horizontal plane in front of an eye of a spectacles wearer comprises a supporting plate onto which a spectacles frame can be positioned with the upper or lower outside edges of the lens-mounting rims downward; a marking line on the surface of the supporting plate for alignment of the spectacles frame; and at least one adjustable means permitting measurement of an angle between an imaginary line connecting a nasal and a temporary edge of a lens-mounting rim and the marking line.

Abstract: To provide a template holder in which parts such as screws for mounting a template to a template mounting member is not lost. A template holder, in which in a state in which an elastic strut 94 is inserted into a holding hole 81 of a template 80, the template 80 is pressed and is caused to abut upon an end surface 91b of a base member 91a by the elastic strut 94 by operating a pressing strut 95, whereby while the template 80 is mounted to a holding member 91, the holding member 91 is departed from the template 80 by operating the pressing strut 95 to thereby enable the template 80 to be removed from the elastic strut 94 and the holdig member 91, wherein the pressing strut 95 and the elastic strut 94 are held by the holding member 91 when the template 80 is attached and detached.

Abstract: To provide a template holder in which parts such as screws for mounting a template to a template mounting member is not lost. A template holder, in which in a state in which an elastic strut 94 is inserted into a holding hole 81 of a template 80, the template 80 is pressed and is caused to abut upon an end surface 91b of a base member 91a by the elastic strut 94 by operating a pressing strut 95, whereby while the template 80 is mounted to a holding member 91, the holding member 91 is departed from the template 80 by operating the pressing strut 95 to thereby enable the template 80 to be removed from the elastic strut 94 and the holding member 91, wherein the pressing strut 95 and the elastic strut 94 are held by the holding member 91 when the template 80 is attached and detached.

Abstract: A tracer is provided for tracing a lens mount of an eyeglass frame, a lens or a lens pattern. The tracer comprises an object engager and an actuator. The object engager is adapted to engage the lens mount, the lens or the lens pattern. The actuator is adapted to move the object engager into contact with and then along the lens mount, the lens or the lens pattern in such a way that during movement therealong, the object engager remains against the object being traced even when the shape thereof includes high wrap. Preferably, the tracer has a shift mechanism adapted to shift the object engager from alignment with the lens mount to alignment with a second lens mount of the eyeglass frame. The actuator preferably is further adapted to trace the second lens mount in substantially the same way as the first. The actuator further includes a rotator and a pivot mechanism. The rotator is adapted to rotate the object engager along the object being traced.

Abstract: A target lens shape measuring device for measuring a target lens shape of an eyeglass lens has a measuring section including: a template feeler contactable with a periphery of a template; a first supporting base to which the template feeler is attached; a first motor and a link mechanism that move the template feeler and the first supporting base between a measuring position and a retracted position, wherein the link mechanism located between the measuring position and the retracted position is engaged with the first supporting base, and the link mechanism located at the measuring position is disengaged with the first supporting base; a second motor that moves the template feeler and the first supporting base in a radius vector direction of the template; and a first encoder that detect an amount of movement of the template feeler and the first supporting base in the radius vector direction of the template.

Abstract: A workpiece (22) having a periphery is centered using a centering apparatus (20) having a workpiece spindle (24, 28) operable to rotate the workpiece (22) about a rotational axis (26), and a centering head (29). The centering head (29) includes a mount (30) movable in a movement direction lying in a plane (40) perpendicular to the rotational axis (26), and generally along a radial line (38) extending outwardly from the rotational axis (26). A swivel head (32) is pivotably supported on the mount (30) and is pivotable about a pivot axis (46) parallel to the rotational axis (26). The swivel head (32) has a pair of bearings (66) spaced apart along a direction lying generally perpendicular to the movement direction, with the bearing axis of each bearing (46) parallel to the rotational axis (26). A distance measuring device (34) is operable to measure the distance between the periphery of the workpiece (22) and a measurement location on the mount (30).

Abstract: A control system is provided for a pivotally actuated tracer which traces an object (e.g., a frame mount of an eyeglass frame, a lens, or a lens pattern) while the object is held in a more-vertical-than-horizontal orientation. The control system comprises a trace control element and a gravity compensation element. The trace control element applies control signals to the pivotally actuated tracer. In response, the object engager of the tracer is pivotally actuated against and along the object to be traced with a biasing force toward the object. The gravity compensation element is adapted to compensate for the effects of gravity on the object engager by causing a varying pivoting force to be exerted on the object engager. The pivoting force varies depending on the rotational orientation of the object engager to keep the biasing force substantially constant along the object. Also provided is a data acquisition system for the tracer.