JP5591025B2 - Centering method and centering device, lens centering method, lens centering device, frame cutting method and frame cutting device - Google Patents

Description

  The present invention relates to a centering method, a centering device, a lens centering method, a lens centering device, a frame cutting method, and a frame cutting device in optical component processing.

  Conventionally, a centering machine used in a centering process in lens processing is roughly classified according to a centering method performed prior to centering. One of the centering methods is to detect or detect the eccentric state of the lens by transmitting or reflecting the inspection light irradiated from one side of the lens to form an image with the lens and observing this image with the eyepiece. This is an optical centering method. The other method of centering is to place the lens between two spindles arranged on the same axis so as to face each other, and press both spindles together to slide the lens into a predetermined position to center the lens. It is a bell clamp type centering method for operation.

  As an optical centering method, for example, a technique described in Patent Document 1 is known. In the apparatus shown in FIG. 8, first, the lens 9 to be centered is fixed to the lens yatoy 7 in a state of being centered to some extent with an adhesive such as unillustrated. Next, the eccentric state between the optical axis of the lens 9 and the rotation axis of the lens holding shaft 1 is measured using the eccentricity measuring device 10. The arithmetic processing unit 17 calculates the eccentric state between the rotation axis of the lens holding shaft 1 and the optical axis of the lens 9, that is, the amount of eccentricity perpendicular to the rotation axis of the lens holding shaft 1 and the eccentric angle in the tilt direction. Based on this value, the position adjustment in the direction perpendicular to the rotation axis is performed by rotating the XY table adjustment screw 5, and the adjustment in the tilt direction is performed by rotating the lens yatoi adjustment screw 8.

  In order to automate the above centering process, Patent Document 1 describes a technique for adjusting the position of the table using a piezoelectric element instead of the XY table adjusting screw 5 and the lens yatoi adjusting screw 8.

  Thereafter, as shown in FIG. 9, the centering machine performs centering processing by contacting the peripheral surface of the lens 9 while the grindstone 74 provided in the same machine moves back and forth in the axial direction and grinds the outer diameter. Do.

JP-A-6-99339

  However, in Patent Document 1, in order to automate the centering process, the position of the table 3 is adjusted using the piezoelectric element after calculating the eccentric state by the arithmetic processing unit 17, so that the voltage is supplied to the piezoelectric element. The wiring is wound around the lens holding shaft 1 with the continuous rotation of the lens holding shaft 1 and hinders the rotation.

  The present invention has been made in view of the above, and a centering method, a centering device, a lens centering method, a lens centering device, and a frame capable of adjusting the eccentricity of an optical component without hindering continuous rotation of the holding shaft. An object is to provide a cutting method and a frame cutting apparatus.

  In order to solve the above-described problems and achieve the object, a centering device according to the present invention holds and fixes an optical component by a holding shaft rotatably installed on a centering device frame and a tip of the holding shaft. A holder, an eccentricity measuring unit for measuring an eccentric state between the optical axis of the optical component held and fixed to the holder and the rotating shaft of the holding shaft, and the holder with respect to the rotating shaft of the holding shaft. A position adjustment unit capable of moving in a direction orthogonal to the tilt direction and an inclination direction, an arithmetic processing unit for calculating a position adjustment amount of the holder based on an eccentric state measured by the eccentricity measurement unit, and the centering device frame And a drive unit that drives the position adjustment unit based on the position adjustment amount calculated by the arithmetic processing unit.

  In the centering device according to the present invention as set forth in the invention described above, the driving unit drives the position adjusting unit in synchronization with rotation of the holding shaft.

  A lens centering device according to the present invention is the centering device according to the above invention, wherein the optical component is a centering device, a grinding tool capable of grinding the lens, the lens and the grinding And a moving unit that relatively moves the tool.

  A frame cutting device according to the present invention is the centering device according to the above invention, wherein the optical component is a lens fixed to the lens frame, and the outer periphery of the lens frame can be cut. A cutting tool and a moving unit that relatively moves the lens frame and the cutting tool are provided.

  Further, the centering method according to the present invention includes an eccentric state between the optical axis of the optical component held and fixed to the holder at the tip of the holding shaft rotatably installed on the centering device frame and the rotating shaft of the holding shaft. An eccentricity measuring step for measuring the holding axis, and the holding unit that is movable in a direction perpendicular to the rotation axis and an inclination direction of the holding shaft by a position adjusting unit based on the eccentricity state measured in the eccentricity measuring step. An arithmetic processing step for calculating the position adjustment amount of the tool, and the centering device frame arranged to contact and operate in synchronization with the rotation of the holding shaft based on the position adjustment amount calculated by the arithmetic processing step. The position adjustment unit is driven by the driven unit to move the holder in at least one of a direction orthogonal to the rotation axis of the holding shaft and an inclination direction. A step, characterized in that it comprises a.

  Further, the lens centering method according to the present invention includes a centering step for centering the lens as the optical component by the centering method of the above invention, and a grinding step for grinding the outer peripheral portion of the centered lens. It is characterized by including.

  Further, the frame cutting method according to the present invention includes a centering step for centering the lens as the optical component fixed to the lens frame by the centering method of the above invention, and the lens frame of the centered lens. Cutting the outer peripheral portion of the substrate.

  According to the present invention, in a centering device or a frame cutting device that automatically performs optical centering and performs centering, a position adjusting unit that can move the holder is provided by a drive unit installed in the centering device frame. By driving, it is possible to adjust the eccentricity of the lens and the lens frame, which are optical components, without hindering the rotation of the holding shaft.

FIG. 1 is a perspective view showing a schematic configuration of a centering machine including a centering device according to a first embodiment of the present invention. FIG. 2 is a schematic diagram showing a cross section of a schematic configuration of the centering machine shown in FIG. FIG. 3 is a schematic diagram illustrating a configuration of the eccentricity measurement unit illustrated in FIG. 2. FIG. 4 is a diagram for explaining the operation of the eccentricity measuring unit shown in FIG. FIG. 5 is a diagram for explaining the operation of the eccentricity measuring unit shown in FIG. FIG. 6 is a flowchart showing a centering process procedure by the centering machine shown in FIG. FIG. 7 is a schematic diagram illustrating a schematic configuration of the frame cutting machine including the centering device according to the second embodiment of the present invention. FIG. 8 is a diagram for explaining the prior art. FIG. 9 is a diagram for explaining the prior art.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

[Embodiment 1]
Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a schematic configuration of a centering machine M1 showing a state after the lens is fixed in the first embodiment, and FIG. 2 is a schematic diagram showing a cross section of the schematic configuration. As shown in FIGS. 1 and 2, the centering machine M1 can grind a centering device 21 corresponding to an example of the centering device of the present invention and a lens L as an optical component held by the centering device 21. And a grinding wheel 31 as a proper grinding tool.

  The centering device 21 is for rotating the lens L to measure its eccentric state, and for centering the lens L based on the measured eccentric state. The centering device 21 includes a spindle (holding shaft) 22 rotatably held by a frame (centering device frame) F, a holder 23, a position adjusting unit 24, an eccentricity measuring unit 25, and an arithmetic processing unit 26. And a drive unit 27. Schematically, the holder 23 holds the lens L at the upper end (tip). The position adjustment unit 24 displaces the holder 23. The eccentricity measuring unit 25 detects the eccentric state of the lens L. The arithmetic processing unit 26 calculates the position adjustment amount of the holder 23 based on the eccentric state measured by the eccentricity measuring unit 25. The drive unit 27 drives the position adjustment unit 24 based on the position adjustment amount calculated by the arithmetic processing unit 26.

  The eccentricity measurement unit 25, the arithmetic processing unit 26, the drive unit 27, the rotation detection unit 28 that detects the rotation of the spindle 22, the input unit I, and the output unit O are connected to the control unit C. The control unit C is realized by a CPU, the input unit I is realized by a pointing device, and the output unit O is realized by a monitor.

  The holder 23 has a columnar holder body 23a and a columnar tip portion 23b having a smaller diameter than the holder body 23a and formed at the upper end of the holder body 23a. It is fixed to the upper surface of the part 24. The lower surface Lb of the lens L is fixed to the holder distal end portion 23b with an adhesive such as spear.

  The position adjusting unit 24 is orthogonal to the rotation axis 22 a of the spindle 22 and a horizontal movement mechanism that allows the holder 23 to move in a direction orthogonal to the rotation axis 22 a of the spindle 22, that is, the horizontal direction (XY direction). An inclination direction moving mechanism that allows the holder 23 to move in an inclination direction (αβ direction) with respect to the surface (horizontal plane).

  The horizontal movement mechanism is configured by stacking an X-axis direction table 24 a that can move in parallel in the X-axis direction and a Y-axis direction table 24 b that can move in parallel in the Y-axis direction, and is fixed to the upper part of the spindle 22. . That is, the X-axis direction moving table and the Y-axis direction moving table are stacked on the base 24e, and the holder 23 is displaced in the horizontal direction by displacing the position of the moving table with respect to the base 24e. Let

  The tilt direction moving mechanism is configured by vertically stacking an α-axis direction table 24c that can move (swing) in the α-axis direction and a β-axis direction table 24d that can move (swing) in the β-axis direction. It is fixed to the upper surface of the Y-axis direction table 24b of the horizontal movement mechanism. The curvature swing centers Os of the α-axis direction table 24 c and the β-axis direction table 24 d are arranged so as to coincide with each other on the rotation shaft 22 a of the spindle 22.

  Each of the α-axis direction table 24c and the β-axis direction table 24d is configured by stacking a moving table on the base 24f, and the holder 23 is displaced by displacing the position of the moving table with respect to the base 24f. Is swung.

  The eccentricity measuring unit 25 is disposed above the holder 23 and the lens L, and is used to measure the eccentricity of both surfaces La and Lb of the lens L with respect to the rotation shaft 22a of the spindle 22. As shown in FIG. 3, the eccentricity measuring unit 25 includes a target 252, a daylighting lens 253, a half prism 254, an imaging lens 255, a magnifying lens 256, and a television camera 257 in addition to the measurement light source 251. .

  That is, the target 252, the daylighting lens 253, and the half prism 254 are sequentially arranged on the optical path of the light emitted from the measurement light source 251. A target image obtained by irradiating the target 252 with light from the measurement light source 251 is incident on the daylighting lens 253 and is incident on the lens L by reflection of the half prism 254. Further, above the half prism 254, an image forming lens 255 that collects light reflected by the lens L and transmitted through the half prism 254 to form a target image, and a target image to be formed A magnifying lens 256 and a television camera 257 for projecting a target image formed by magnifying are arranged. The image displayed by the television camera 257 is processed by an image processing device (not shown), and the target image reflected by the lens L can be displayed on a monitor (not shown).

  The eccentricity measuring unit 25 is installed so as to be movable in the direction of the rotation axis 22a of the spindle 22 so that the target image formed on the upper surface La or the lower surface Lb of the lens L can be observed on the monitor.

  The eccentricity measuring unit 25 measures the eccentric state of the lens L, that is, the deviation between the rotation axis 22a of the spindle 22 and the optical axis of the lens L as follows. Here, the optical axis of the lens L is a line connecting the centers of curvature of both surfaces La and Lb of the lens L. As shown in FIG. 4, after the target image reflected by the upper surface La of the lens L is made observable by a monitor (not shown), when the spindle 22 is rotated, the target image is directed to the rotation axis 22a at the center of curvature of the upper surface La. It rotates so as to draw an arc proportional to the amount of displacement ΔXY in the horizontal direction.

  Here, when the lens L is moved in the horizontal direction by ΔXY so as to stop the rotation blur of the target image, the center of curvature of the upper surface La coincides on the rotation axis 22a.

  In addition, as shown in FIG. 5, when the center of curvature of the upper surface La coincides with the rotation axis 22a, the target image reflected by the lower surface Lb of the lens L can be observed with a monitor (not shown). When the spindle 22 is rotated, the target image rotates so as to draw an arc proportional to the inclination angle θ of the lower surface Lb with respect to the rotation axis 22a.

  Here, when the lens L is swung by the inclination angle θ so as to stop the rotation blur of the target image, the center of curvature of the lower surface Lb coincides on the rotation axis 22a.

  At this time, the center of curvature of the upper surface La is deviated from the rotation axis 22a, but the deviation of the optical axis is smaller than the state shown in FIG. Therefore, as described above, by repeating the correction of the position of the center of curvature of the upper surface La and the correction of the position of the center of curvature of the lower surface Lb, the inclination and the lateral shift amount of the optical axis of the lens L are small enough to be ignored. can do.

  The arithmetic processing unit 26 is connected to the eccentricity measuring unit 25, and the eccentricity between the lens L fixed to the holder 23 and the rotation shaft 22 a of the spindle 22 from the eccentricity measurement result and the lens shape information, that is, in the horizontal direction. It is possible to calculate the lateral deviation amount and the angular direction in which the optical axis deviation occurs with respect to the rotation axis 22 a of the spindle 22.

  The drive unit 27 is connected to the control unit C and can drive the position adjustment unit 24 based on the calculation result of the eccentric state of the arithmetic processing unit 26. The drive unit 27 includes a horizontal direction drive device 27a and a tilt direction drive device 27b. The horizontal direction driving device 27a and the inclination direction driving device 27b are installed on the frame F of the centering device 21, and are synchronized with the rotation of the spindle 22 to discontinuously hit the position adjusting unit 24 from the outside, so that the lens L The position adjusting unit 24 is driven until the holding tool 23 holding and fixing is moved to a desired position.

  The drive unit 27 is disposed at a retracted position so as not to come into contact with the position adjustment unit 24 except when centering (at the time of eccentricity adjustment), and the electrical wiring connected to the drive unit 27 is only for the control unit C. is there.

  In addition, a fixing device 29 capable of suppressing the relative movement between the moving base of each table (24a, 24b, 24c, 24d) and the base is built in the position adjusting unit 24. As the fixing device 29, for example, a porous 29 a is embedded in the position adjusting unit 24 and a vacuum tube 29 b is connected so as to communicate with the inside of the position adjusting unit 24. And it can fix by applying a negative pressure via the vacuum tube 29b, and making all the tables mutually vacuum-suck. The vacuum tube 29a is formed of a tube having a thickness that can secure an air passage even when each table is displaced from the initial position within an assumed range of the eccentricity adjustment amount.

  On the other hand, in the grinding wheel 31 constituting the centering machine M1 together with the centering device 21 described above, the moving part 32 is fastened to the spindle 31a, and the outer periphery of the lens L can be ground by the control of the control part C. Is configured to be relatively movable.

  Next, the centering procedure of the lens L by the control unit C performed using such a centering machine M1 will be described with reference to the flowchart shown in FIG. First, the lens L to be centered is fixed to the holder 23 in a state where the lens L is centered to some extent with an adhesive (not shown). Further, the fixing by the fixing device 29 is released (step S1).

  Here, as illustrated in FIG. 4, the lens L fixed to the holder 23 is in a state where the optical axis is inclined with respect to the rotation axis 22 a of the spindle 22 and shifted laterally depending on the position of the holder 23. It has become. Alternatively, as illustrated in FIG. 5, the optical axis of the lens L is inclined with respect to the rotation axis 22 a of the spindle 22. Therefore, first, the eccentric state is measured by the eccentricity measuring unit 25 (step S2). That is, after the target image reflected by the upper surface La of the lens L can be observed on a monitor (not shown), when the spindle 22 is rotated, the target image is proportional to the lateral displacement amount ΔXY of the upper surface La with respect to the rotation axis 22a. Rotate to draw an arc. Alternatively, when the spindle 22 is rotated after the target image reflected by the lower surface Lb of the lens L can be observed on a monitor (not shown), the target image is proportional to the inclination angle θ of the lower surface Lb of the lens L with respect to the rotation axis 22a. Rotate to draw a circular arc.

  Then, based on the obtained arc size and lens L shape information, the arithmetic processing unit 26 calculates the lateral displacement amount ΔXY (the eccentric amount) of the lens L held by the holder 23 as a position adjustment amount (step S3). ). Alternatively, based on the obtained arc size and shape information of the lens L, the arithmetic processing unit 26 again uses the inclination angle θ (the amount of eccentricity) of the optical axis of the lens L held by the holder 23 as the position adjustment amount. Calculate (step S3).

  Here, when such an eccentricity is present (Yes in step S4), if the eccentricity is lateral deviation (Yes in step S5), the control unit C is based on the lateral deviation amount ΔXY calculated by the arithmetic processing unit 26. Then, the horizontal driving device 27a is driven, and the holder 23 is moved horizontally by the lateral deviation amount ΔXY (step S6). That is, the horizontal position adjustment of the position adjusting unit 24 is performed by hitting the position adjusting unit 24 discontinuously by the horizontal driving device 27a in synchronization with the rotation of the spindle 22 in accordance with the eccentric state of the lens L. When the holder 23 is completely moved to the desired position, the operation of the drive unit 27 is stopped, and the process returns to step S2.

  Then, the eccentricity is again measured by the eccentricity measuring unit 25 (step S2). If there is an eccentricity (Yes in step S4), if the eccentricity is not laterally shifted (No in step S5), the control unit C performs an arithmetic process. The tilt direction driving device 27b is driven based on the tilt angle θ calculated by the unit 26, and the holder 23 is swung by the tilt angle θ (step S7). That is, the position adjustment unit 24 is adjusted in position by hitting the position adjustment unit 24 discontinuously by the tilt direction driving device 27b in synchronization with the rotation of the spindle 22 in accordance with the eccentric state of the lens L. When the holder 23 is completely moved to the desired position, the operation of the drive unit 27 is stopped, and the process returns to step S2.

  In this way, the process of measuring the eccentric state and displacing the holder 23 by the position adjusting unit 24 is repeated to make the state free from eccentricity (No in step S4), and the centering is completed. In a state where the eccentricity has disappeared, the relative movement between the base of each table and the moving table is suppressed by the fixing device 29 arranged inside the position adjusting unit 24, and a fixed state is set (step S8).

  In addition, the process of step S1-step S8 mentioned above corresponds to the centering step.

  Thereafter, the grinding wheel 31 rotated at a high speed is moved closer to the outer peripheral portion of the lens L and pressed by the moving unit 32, so that the outer periphery of the lens L is ground until the lens L has a desired outer diameter. I do. Thereby, the centering of the lens L is completed (step S9).

  The operation of the drive unit 27 may be synchronized with the rotation of the spindle 22 in a broad sense. That is, it includes operating in association with the rotation of the spindle 22. For example, the operation includes driving the drive unit 27 after rotating the spindle 22 once to stop the rotation, and restarting the rotation of the spindle 22 again.

  According to the first embodiment, the eccentric state of the lens L fixed to the holder 23 is measured by the eccentricity measuring unit 25, and the position adjustment amount in the position adjusting unit 24 based on the result is calculated by the arithmetic processing unit 26. The position adjustment unit 24 can be adjusted by the external drive unit 27 until the position where the eccentricity is eliminated, and the outer periphery of the lens L where the optical axis and the rotation axis 22a of the spindle 22 coincide with each other is high. Accurate centering can be easily performed. At this time, since the electrical wiring for controlling the horizontal direction driving device 27a and the tilt direction driving device 27b is wired so as not to be affected by the rotation of the spindle 22, the electrical wiring is not affected even if the spindle 22 is continuously rotated. It does not wind around the spindle 22.

[Embodiment 2]
Next, a second embodiment of the present invention will be described. FIG. 7 is a cross-sectional view showing a schematic configuration diagram of frame cutting machine M2 showing a state after fixing lens frame W to which lens L is fixed in Embodiment 2 of the present invention. As shown in FIG. 7, the frame cutting machine M <b> 2 includes a centering device 21 and a cutting tool 33.

  In the second embodiment, in place of the lens L in the first embodiment, the lens frame W having the lens L fixed inside is centered. Further, in place of the grinding wheel 31, the cutting tool 33 is disposed so as to be movable relative to the lens frame W. About another point, it is the same as Embodiment 1, and the same code | symbol is attached | subjected to the same component.

  A method of cutting the lens frame W performed using such a frame cutting machine M2 will be described. First, the lens frame W to be frame-cut is fixed and held on the holder 23 via screws. At this time, the lens L is fixed inside the lens frame W by an adhesive or the like.

  Next, the eccentric state of the lens L inside the lens frame W is measured, and the position adjustment amount of the position adjustment unit 24 is calculated by the arithmetic processing unit 26. After that, the drive unit 27 adjusts the position adjustment unit 24 by a desired amount and performs centering, and the fixing device 29 inside the position adjustment unit 24 suppresses the relative movement of each stage constituting the position adjustment unit 24. The method is the same as in the first embodiment.

  After that, by operating the moving unit 32, the cutting tool 33 approaches and presses the outer peripheral part of the lens frame W, and moves in the axial direction of the spindle 22, so that the outer peripheral part of the lens frame W has a desired outer diameter shape. Cutting is performed until the frame cutting is completed.

  According to the second embodiment, since the outer periphery of the lens frame W on which the lens L is fixed and held can be cut while the optical axis of the lens L is aligned with the rotation axis 22a of the spindle 22, the lens frame The outer periphery of the lens frame W can be cut so that the center axis of W coincides with the optical axis of the lens L, and frame cutting in which the optical axis matches the center axis of the lens frame W can be easily performed with high accuracy. It can be carried out.

  Also in the second embodiment, since the electrical wiring for controlling the horizontal direction driving device 27a and the tilt direction driving device 27b is wired so as not to be affected by the rotation of the spindle 22, the spindle 22 is continuously rotated. However, the electrical wiring does not wrap around the spindle 22.

DESCRIPTION OF SYMBOLS 21 Centering apparatus 22 Holding shaft 23 Holding tool 24 Position adjustment part 25 Eccentricity measurement part 26 Operation processing part 27 Drive part 31 Grinding wheel 32 Moving part 33 Cutting tool C Control part F Frame L Lens W Mirror frame

Claims (9)

A holding shaft rotatably mounted on the centering device frame;
A holder for holding and fixing the optical component at the tip of the holding shaft;
An eccentricity measuring unit for measuring an eccentric state between an optical axis of the optical component held and fixed to the holder and a rotation axis of the holding shaft;
A position adjusting unit that enables the holder to move in a direction perpendicular to the rotation axis of the holding shaft and a tilt direction;
An arithmetic processing unit that calculates a position adjustment amount of the holder based on an eccentric state measured by the eccentricity measuring unit;
Said centering is provided without using the holding shaft to the apparatus frame,-out based on the position adjustment amount calculated by the arithmetic processing unit, a driving unit for driving the position adjusting section by contact operation,
A centering device comprising: The centering device of claim 1, wherein
The drive unit, such that rotation of the holding shaft and the driving of the position adjusting section coincide temporally, centering apparatus characterized by driving the position adjusting section.   The centering device of claim 1, wherein
  The centering device is characterized in that after the rotation of the holding shaft is stopped, the drive unit is operated to restart the rotation of the holding shaft again. The centering device according to any one of claims 1 to 3 , wherein the optical component is a lens.
A grinding tool capable of grinding the lens;
A moving unit that relatively moves the lens and the grinding tool;
A lens centering device comprising: The centering device according to any one of claims 1 to 3 , wherein the optical component is a lens fixed to a lens frame.
A cutting tool capable of cutting the outer periphery of the lens frame;
A moving unit that relatively moves the lens frame and the cutting tool;
A frame cutting device comprising: An eccentricity measuring step for measuring an eccentricity state between an optical axis of an optical component held and fixed to a holder at a tip of a holding shaft rotatably installed on a centering device frame and a rotation axis of the holding shaft;
Based on the eccentric state measured in the eccentricity measuring step, a position adjustment amount of the holder that is movable in a direction orthogonal to the rotation axis and an inclination direction of the holding shaft by the position adjusting unit is calculated. An arithmetic processing step;
Based on the position adjustment amount calculated in the calculation processing step, the drive of the position adjustment unit and the rotation of the holding shaft are passed through the centering device frame via the holding shaft so as to coincide with each other in time. by driving the position adjusting section by the installed by that contact operation to the driving unit without the position of moving in at least one of the orthogonal directions and the tilt direction with respect to the rotation axis of the holding shaft the retainer An adjustment step;
A centering method characterized by comprising:   An eccentricity measuring step for measuring an eccentricity state between an optical axis of an optical component held and fixed to a holder at a tip of a holding shaft rotatably installed on a centering device frame and a rotation axis of the holding shaft;
  Based on the eccentric state measured in the eccentricity measuring step, a position adjustment amount of the holder that is movable in a direction orthogonal to the rotation axis and an inclination direction of the holding shaft by the position adjusting unit is calculated. An arithmetic processing step;
  After stopping the rotation of the holding shaft, based on the position adjustment amount calculated by the calculation processing step, the position is determined by a contact operation by a driving unit installed on the centering device frame without the holding shaft. The adjustment unit is driven to adjust the position by moving the holder in at least one of a direction orthogonal to the rotation axis and an inclination direction of the holding shaft, and then restart the rotation of the holding shaft again. Position adjustment step to be
  A centering method characterized by comprising: A centering step of centering the lens that is the optical component by the centering method according to claim 6 or 7 ,
A grinding step for grinding the outer periphery of the centered lens;
A lens centering method comprising: A centering step of centering the lens which is the optical component fixed to the lens frame by the centering method according to claim 6 or 7 ,
Cutting the outer periphery of the lens frame of the centered lens;
A frame cutting method comprising:

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