JPS63113419A - Method and device for lens mark point - Google Patents

Abstract

PURPOSE:To easily decide that spectacles have lenses put in its frame or not by indicating the distribution area of an addition degree that a spectacles wearing person requires in short-sight operation by mark points on the lenses. CONSTITUTION:The addition degree of at least the short-sight part of a progressive multifocal lens is measured in a certain area, the maximum addition degree is selected according to the measurement result, and the border value of the addition degree of the short-sight part is determined on the basis of the selected maximum addition degree. Then, the addition degree of plural measurement- point on the short-sight part are measured and compared with the border value to provide a mark point at or nearby the measurement point where the addition degree is larger than the border value. Therefore, the mark point is marked at least the short-sight part of the lens based on the addition degree measurement result without using any check card. Consequently, it is easily decided whether the wearing person puts on spectacles so as to utilize short-sight parts which are refraction-corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an automatic marking method and an automatic marking device for a progressive multifocal lens used together with a lens meter.

(Background Art) In recent years, there has been an increasing demand for seamless progressive multifocal lenses for the correction of early presbyopia in middle-aged and elderly people.

This progressive multifocal lens has a distance portion, a near portion, and a progressive band connecting the two that are continuously composed of complex aspherical surfaces, so unlike conventional bifocal lenses, the appearance alone gives a refractor for distance vision. It is not possible to know the characteristic measuring section or the near refraction characteristic measuring section.

Here, the refractive characteristic is used as a general definition of spherical power, cylindrical power, cylindrical axis angle, and prism power. For this reason, each lens manufacturer applies various markings to the N-edition uncut lenses that are delivered to eyeglass stores and placed in the lens rims of eyeglass frames. This makes it easier to process lenses at different times. Fig. 13 shows an example, where 310 is a horizontal reference line, 311 is a diamond mark, and 315 is a horizontal reference line.
312 is a fitting mark; 313 is a far-sight refractive characteristic measuring section indication mark; 316 is a near-sight refractive characteristic measuring section indication mark; 314
317 indicates the near addition power, and 317 indicates the maker's mark. When measuring the distance refractive properties of this lens with a lensmeter, the measurement optical axis of the lensmeter should be located within the circle marked 313, and the mark 313 should be aligned with the center of the lens holder of the lensmeter. Set the lens on. Also, when measuring near refractive characteristics, 31
Set the lens so that the circle marked 6 lines up with the lens holder. Further, if necessary, if it is desired to know the refractive characteristics at the position indicated by the fitting mark 312, the lens is set so that the intersection 312a of the mark 312 coincides with the center of the lens receiver.

(Problems to be Solved by the Present Invention) Current progressive multifocal lenses having the above-mentioned configuration,
As mentioned above, since the progressive zone and the area around the near vision area have a complex aspherical structure, it is necessary to fit the lens into the eyeglass frame so that the presbyopia to be worn is accurately positioned in the near vision area.

However, the diamond mark 311 and the near addition power display 31 are displayed on the lens after it has been framed/inserted into the eyeglass frame.
4 and the maker mark 317 are all erased.

However, since the refractive surface of the progressive multifocal lens is a high-order functional curved surface, the astigmatism distribution and the equal refractive power value distribution curve of the near addition power distribution have a complicated shape. For this reason, it is not only extremely difficult to determine the position of the near vision measurement part through trial and error, but also, depending on the lens, the near vision measurement part position may be the maximum addition power position and/or astigmatism (cylindrical degree). ) There are some that specify a location other than the minimum position. Therefore, it has sometimes been impossible to determine the measurement area by a trial-and-error method, or even to mark that position.

As a countermeasure for this, each lens manufacturer uses a check card. A card showing the various marks shown in FIG. 13 is prepared separately, and the check card is pasted on the lens so that the diamond mark on the check card and the diamond mark 311 remaining on the framed lens are aligned. Then, based on the far and near refractive characteristic measurement section instruction marks on the check card, mark the lenses along the marks with a marker ben, etc., and then have the wearer wear the marked glasses. . Based on the positional relationship between the position of the presbyopic wearer and the marked instruction mark position during distance vision work and near vision work, it is possible to determine whether the lens is correctly fitted into the frame or whether the fitting of the eyeglass frame is accurate. This decision required extremely complicated work.

Furthermore, this check card is not necessarily kept by all lens manufacturers at all eyeglass stores, and if you do not have the designated check card, there is nothing you can do to make this decision. This was the current situation.

Furthermore, even if there was a check card, there was a problem in that it was extremely difficult to find the mark because it was displayed very thinly on the lens.

Furthermore, when using a check card to mark or mark the distance and near vision areas, the diamond mark on the lens and the respective positions of the distance vision measuring part 13 and the near vision measuring part 16 of the lens are different from each other. It is assumed that there is no variation between lenses, that is, there are no individual differences. Therefore, if an error occurs in the positional relationship of these kings due to a lens manufacturing error by the lens manufacturer, it will no longer be possible to accurately determine the position of the measurement unit and perform markings and dots with high precision.

In this way, with conventional methods, it is not possible to mark the near measurement part of the lens, that is, the part that the lens wearer is designated to look through during near vision work, making it difficult for the wearer to get correct refractive correction. It was not possible to determine at all whether or not the patient was wearing glasses using the near vision area.

An object of the present invention is to eliminate the above-mentioned conventional drawbacks related to the measurement of the refractive properties of a progressive multifocal lens and the automatic marking point, and to mark at least the near vision part of the lens based on the result of the addition power measurement without using a check card. It is an object of the present invention to provide a lens marking method and a device for the same.

[Structure of the invention]

(Means and effects for solving the problem) The present invention includes the steps of: measuring the addition power of at least the near vision portion of a progressive multifocal lens within a certain region; and selecting the maximum addition power from the measurement results; a step of determining a near-sight section add power boundary value based on the selected maximum add power; a step of measuring the add power at a plurality of measurement points in the near-sight section; and a step of comparing the add power measurement result with the boundary value. This lens marking method comprises the step of marking on or near a measurement point having an addition power greater than a boundary value.

The present invention also provides a measuring means for automatically measuring the addition power of at least the near vision portion of a progressive multifocal lens at a plurality of measurement points, and a selection means for determining the maximum addition power from the measurement results.
determining means for determining a near-part add power boundary value based on the maximum add power; and marking means for marking on or near a measurement point within a larger area.

(Example) Mechanical configuration of the first embodiment device Fig. 1 schematically shows the mechanical configuration of the automatic marking device for a lens meter according to the present invention.
Please refer to the patent application filed by the same applicant on February 27, 2007, titled "Automatic alignment device for test lens and automatic marking device including the same."

As shown in FIG. 1, this automatic marking device holds a lens to be examined or a spectacle frame in which the lens is framed,
A support mechanism section IO for moving, a lens holding section 20 for holding down the test lens, a marking section 30 for marking the test lens, and a lens holder for receiving the test lens includes a stand 40. It is roughly structured.

The support mechanism section 10 includes a Y motor 11 consisting of a pulse motor.
It has a Y-axis travel mechanism 11 that moves the X-axis feed mechanism section 12 along the Y-axis direction by the rotation of the motor 11M, for example, by a feed screw mechanism, and a pulse motor 12M, and its rotation. An X-axis feed mechanism 1 that moves the hand opening/closing part 13 along the X-axis direction by, for example, a feed screw mechanism.
2.

The hand opening/closing unit 13 is attached to a belt of a driving unit that is composed of a driving pulley rotated by a hand motor 13M made of, for example, a DC motor, a driven pulley, and an endless belt stretched between both the pulleys. It is composed of two hand support seats that move in opposite directions along arrows 131 and 132 when the motor 13M rotates.

Each hand support seat has arrows 133 and 134 independently.
Hand tables 135 and 136 are mounted so as to be movable up and down within a predetermined range along the direction, that is, along the Z-axis direction. The arms 137 and 138 of the hand table have inner contact surfaces 141 and 151 for holding the edge surface of the uncut lens, and outer contact surfaces 142 that contact the temple T of the eyeglass frame F as shown in the figure. The left and right hands with .152 and 14.15 are 143.153
It is rotatably mounted on the

The lens support stand 40 includes a cylindrical member 42 having an opening 41 through which the optical axis 0 of the measurement optical system of the lens meter in which the automatic marking device of the present invention is incorporated is embedded, and the upper end of the cylindrical member 42. The three lens holders are made up of a bottle 43.

The lens holding unit 20 moves the lens holding table 2 along the Z-axis direction by a lens holding motor 20M consisting of a DC motor.
It has a lens presser feeding mechanism 22 for vertically moving the lens holder 1,
A lens holding seat 26 having three lens holding pins 25 is provided at the tip of a support 24 extending downward from the arm 23 of the lens holding table 21.

The lens holding table 21 has a feeding mechanism 31 for the marking section 30.
is fixed. The feed mechanism 31 incorporates a mark moving motor 30M, which is a pulse motor, for moving the mark base 32 in the direction of the arrow 33. mark base 3
A marking pin 35 that is pushed out in the Z-axis direction by a moving coil 34 is attached to 2. mark base 3
2 is in the initial position, an ink fountain 36 is installed below the dot bottle 35.

Control Drive Circuit System FIG. 2 is a block diagram showing the control drive circuit system of the automatic marking device of the present invention. For more detailed circuit configuration, please refer to the aforementioned patent application. X-axis motor 12M, Y-axis motor 11
M and the point moving motor 30M are connected to a pulse generator (not shown) and a pulse driver circuit 200 that controls the supply of pulses from the pulse generator to each motor. Since the lens presser motor 30M and the hand motor 13M are connected to the constant current control circuit 2 (10) and driven with a constant current, the lens presser pressure and the holding pressure of the frame F by the hand 14.15 are kept constant. It will be done.

The point moving coil 34 is connected to the driver circuit 202.

The above pulse driver circuit 200, constant current control circuit 2 (1
0), the driver circuit 202 is connected to and controlled by the sequencer 2 (13) consisting of a microcomputer.

The sequencer 2 (13) includes an initial coitrol circuit 2 (12) for controlling the holding of the test lens and the initial holding and positioning of the eyeglass frame F, a comparison circuit 206, and a control circuit based on the information from the detector 1. A refractive characteristic measurement value processing unit that determines the refractive characteristics of the lens to be tested, a RAM (random access memory) 211, an arithmetic circuit 209, a program memory 213, and an alignment selection switch 205 are connected.

For example, a CRT for displaying the measured values of the refractive properties of the lens.
Indicator 2 consisting of a display or liquid crystal display
08 is connected to the processing section 207. The RAM 211 includes a comparison circuit 206, an arithmetic circuit 209, and a sequencer 2 (
13) and the initial control circuit 2 (12). A far/near position input keyboard 210 is connected to this RAM 211 . A ROM (read only memory) 212 is connected to the arithmetic circuit 209 and the initial control circuit 2 (12).

FIG. 3 is a flowchart showing the operation of the automatic marking device of the present invention to hold an eyeglass frame in which a lens to be examined is inserted.

Step S-1> The initial control circuit 2 (12) controls the constant current control circuit 2 (10) according to the program in the program memory 213.
The hand motor 13M is operated via the hand 14.
Close 15.

Step S-2> The measurer places the eyeglass frame F containing the eyeglass lens to be marked on the closed hand 14.15.

Step S-3> The initial control circuit 2 (12) is the constant current control circuit 2 (
10), the hand motor 13M is reversed, the hand 14.15 is opened, and the outer contact surface 142.152 is brought into contact with the temple T of the frame F with a constant pressure.
hold.

Step S-4> The initial control circuit 2 (12) determines whether or not the marking points for the right eye have been completed, and if YES, the process proceeds to Step S-8.
If the answer is No, the process moves to the next step S-5.

Step S-5> In order to position the right eye lens on the optical axis 0 of the measurement optical system 1, the initial control circuit 24 generates the number of pulses corresponding to half the distance of the specified PD value stored in advance in the ROM 212. Readout, X via pulse driver circuit 200
The hand opening/closing part 13 is moved by rotating the shaft mork 12M.

Step S-6> The initial control circuit 2 (12) is the constant current control circuit 2 (
10), the lens presser motor 30M is operated to lower the lens presser table 21.

As a result, the lens holding bottle 25 presses the right eye lens.

That is, the right eye lens is held between the lens holder bin 43 of the lens holder stand 40 and the lens holding bin 25. Furthermore, since the frame F is also held by the hands 14 and 15, it is held with sufficient stability.

Step S-7> After being marked by the marking subroutine to be described in detail later, the process returns to step S-4, where it is determined whether or not the right eye has finished, and if it is determined that the right eye has finished, the next step S- Move to 8.

Step S-8> The initial control circuit 2 (12) reverses the motor 20M, returns the lens presser 1ff120 to its initial position, and then rotates the X-axis motor 12M in the opposite direction to step S-5. and moves the hand opening/closing part 13 by a distance corresponding to the predetermined PD value stored in the ROM 212.

Step S-9> and Step 5-10> perform the same operations as step S-6 and step S-7, respectively.

Marking Subroutine Next, the marking subroutine of step S-7 will be explained in detail with reference to FIG.

Step l> The measurer operates the alignment selection switch 205,
Mark based on "optical center" or "frame geometric center"
Select whether to mark based on the standard. "Frame geometry center"
The reference is selected when the test lens is, for example, a lens that has been subjected to brism thinning processing and whose distance optical center is outside the lens.

If the "optical center" criterion is selected, the process moves to the next step 2, and if the "frame geometric center" criterion is selected, the process moves to step 4.

Step 2> The measurer learns the product name by checking the manufacturer's mark 317 (see Figure 13), and then determines the optical center (or geometrical Distance from center) 315 mA, B
, C is known, the distance/near position human key port 210 is operated to enter the value manually. The human power data is stored in the ROM 212.

If distance data Δ, B, and C are not input, ROM21
Distance data stored in advance in No. 2 is used, for example, distance data of a lens with a high market share.

Step 3> The sequencer 2 (13) activates the detection 2W1 and measures the distance prism power of the lens. Detection data from the detector is sequentially converted into prism power data by a processing unit 207, and then manually input to a comparison circuit. Comparison circuit 206 is RO
Judgment standard prism power I P stored in M212
, l = 0. (13) and IP, l=0. (13
) is read out, compared with the prism power measurement data from the processing unit 207, and the result is sent to the sequencer 2 (13
).

Sequencer 2 (13) receives prism measurement data PX, P
, is lP, 1<0. (13), IPYI<0. (13)
X-axis 12 via pulse driver circuit 200 until
The M and Y axis motors 11M are operated to move the lens, and the comparison circuit 206 determines that l Px I <0. (13) and l
Pv l<0. The lens movement position determined as (13) is
As shown in FIG. 14, it is stored in the RAM 211 as the optical center position (0, y). After that, the process moves to step 10.

Step 4> If the “frame geometric center” criterion was selected in step 1 above, the measurer should calculate the PD value (
The distance between geometric centers or the distance between the wearer's pupils is manually determined. When there is no human power to determine the PD value, a PD value predetermined as a standard value and stored in the ROM 212 is used.

Step 5> The same operation as in step 2 above is performed.

<Step 6> The initial control circuit 2 (12) operates the X-axis motor 12M via the pulse driver circuit 200 based on the PD value in Step 3, so that the specified PD position, that is, the measurement point is on the optical axis O. Move the lens. For example, if the manual PD value in step 2 is 68 m/m, the RO of this marking device is
The standard PD value stored in M212 is 64m/m.
In this case, since it is positioned at the standard position of P D 64m/m in step S-5, (68-64)÷2
= By moving the hand opening/closing part by 2 m/m, the designated PD position is located on the optical axis O.

<Step 7> The sequencer 2 (13) operates the detector 1 and at the same time operates the Y-axis motor 11M via the pulse driver circuit 200 to move the lens in the Y-axis direction. And the upper rim UL of the lens frame LF of frame F (see Figure 14)
is located on the optical axis ○, and the number of pulses supplied to the Y-axis motor 11M until measurement by the detector 1 becomes impossible is R/M21.
1 to be temporarily stored.

Step 8> The sequencer 2 (13) controls the pulse driver circuit 200 to reverse the Y-axis upper 11M, and rotates the Y-axis upper 11M until the lower rim LL is located on the optical axis O. The number of supplied pulses is temporarily stored in the ROM 212.

Step 9> Calculate the half value of the difference between the number of pulses supplied to the Y-axis upper motor 11M until the detection of the upper rim UL and lower rim LL obtained in steps 7 and 8, and calculate the result and From the position in step 6, the frame geometric center (G, , Gy) is determined as shown in FIG.

Step 10> The sequencer 2 (13) reads from the RAM 211 the distance measurement unit distance A manually input in step 2 or step 4 (if there is no manual input, the predetermined value stored in the ROM 212; the same applies hereinafter), The Y-axis motor IIM is operated via the pulse driver circuit 200. In step 1,
If the "optical center" criterion is specified, the optical center (0,, O,) determined in substep 1, or if the "geometric center" criterion is specified in step 1, the geometric center determined in substep 2. The lens is moved by a distance from (G,, G,) to align the distance measurement unit 313 with the optical axis O of the measurement optical system 1.

(If there is no human power in A in step 2 or 5, the lens's original distance measurement part 313 and the optical axis O do not match.) Step 11> The sequencer 2 (13) operates the detection 31 and the processing gB 207. The refractive characteristics of the distance measurement unit 313 are measured, and the results are displayed on the display 208, and the results are stored in the RAM as a reference distance spherical power MS and a reference distance cylindrical power MC.
211.

Step 12> The sequencer 2 (13) reads the near measurement object distance B%C manually input in step 2 or step 4 from the RAM 211, and operates the X-axis motor 12M5 Y-axis motor l1M via the pulse driver circuit 200 to drive the lens. The near vision measuring section 316 is moved onto the optical axis 0. (If there is no ESC input in step 2 or 5, the near measurement section 316 of the lens does not match the optical axis 0.) Step 13> The sequencer 2 (13) The motor 12M is operated to sequentially move the lens toward the body side and the ear side, and the processing unit 207 calculates the refractive characteristic values S (spherical power) and C (cylindrical power) of the lens moment by moment during movement.
to the arithmetic circuit 209. The processing unit 207 calculates the near addition ADD from the standard distance spherical power MS, the base near spherical power MC, and the momentary near refractive characteristic measurements S and C, and calculates the near addition ADD from the comparison circuit 206. Enter.

The comparison circuit 206 converts the ADD value manually input from the processing unit 207 to its maximum value.

The moving position Kl of the lens with (XKI, yXl)
is determined and outputs the position information to the sequencer 2 (13). At the same time, set 〇〇, 1 to the maximum near addition power.
Store it in M211. The sequencer 2 (13) operates the X-axis motor 12M and the Y-axis motor 11M based on the position information Kl (XXI, y, 1), and moves the lens to the position Kl (X Kl, y, 1). move it to

Step 14> The arithmetic circuit 209 calculates the distance part addition power boundary value Δe and the distance part cylindrical power from the maximum near addition power ADD stored in the RΔM 211 and the constant group stored in advance in the ROM 212. Boundary value Ce.

Calculate the near addition power boundary value AK1 and the near cylindrical power boundary value Ci from, for example,
It is stored in ΔM211.

Step 15> The sequencer 2 (13) operates the X-axis motor 2M via the pulse driver circuit 200 to sequentially move the lens from the position to the body side and the ear side as shown in FIG. The arithmetic circuit 209 receives the measured cylindrical power C from the processing unit 207 and the RAM 211 for each measurement point that changes from moment to moment while the lens is moving.
From the reference distance cylinder power MC stored in (C-M
C) and inputs the result to the comparison circuit 206.

The processing unit 207 calculates the addition power ΔD according to the above equation (a).
D is calculated and the value is manually input to the comparison circuit 206.

The comparison circuit 206 momentarily compares the ADD value from the processing unit 207 and the C-MC value from the arithmetic circuit 209 with the boundary values AKs and CK stored in the RA MgI2, and compares both the body side and ear side of the lens. It is determined whether or not there is a measurement point for which ? holds true, and the determination result is manually input to the sequencer 2 (13).

Step 16> In addition, when the comparison circuit 206 determines in step 15 that the measurement points that satisfy equation (2) are on both the body side and the ear side, the sequencer 2 (13) sets the X-axis element 12M as shown in FIG. is activated again to move the lens to the ear side, and move to the measurement point 2 (X□, yKl) on the body side where equation 0 holds. Next, the driver circuit 202 is activated to excite the moving coil 34 of the marking needle 35 at the center of the marking section 30, and after the marking needle 35 is immersed in the ink pot 36, the marking needle 35 is energized via the pulse driver circuit 200. Activate the moving motor 30M to move the mark base 32.
is lowered to position the center marking needle 35 on the optical axis O.

After that, the moving coil 3 is connected to the moving coil 3 via the driver circuit 202.
4 and make a mark on the lens 2.

Step 17> The sequencer 2 (13) then reverses the mark moving motor 30M to return the mark base 32 to the initial position, and then
Reverse the X-axis controller 12M and move the lens to the side of the body.
Measurement point K 3 (x) where equation 0 holds on the ear side of the lens.

, 'jx+), and in the same manner as in step 16, mark 3 at that measurement point.

Step 18> The sequencer 2 (13) sets the near addition ADD to the maximum position.
The X coordinate value XKI of (xK+, yat') is stored in the RAM21.
1 and read from X through the pulse driver circuit 200.
The motor 12M is driven to return the lens to the first position.

Step 19> The sequencer 2 (13) then operates the Y-axis motor 11M, moves the lens in the near vision direction, and finds a measurement point in the near vision portion of the lens from the distance vision direction. The refraction characteristics of the lens that is moving from time to time are input from the processing unit 207 to the comparison circuit 206, and the comparison circuit 206 determines whether or not the condition of the above formula 0 is satisfied, and inputs the result to the sequencer 2 (13). do. When the sequencer 2 (13) receives a manual command from the comparator circuit 206 to the effect that condition 0 is satisfied, it stops the operation of the Y-axis motor 11M, and at the same time, as shown in FIG. , y85).

At the same time, the X-Y coordinate values of the mark position Kj (XMS, ygs) are stored in the RAM 211.

Step 20> The arithmetic circuit 209 reads out the y-coordinate 4M V w + and y-yo at the position 1 and the mark position from the RAM 211, and has the y-coordinate of and the X-coordinate is xKs (=1 at x ) with movement position Ks(Xxs, yK6) = K6(XK11
, yK6) are calculated. Based on this data, the sequencer 2 (13) operates the Y-axis motor 1M to move the lens to the movement position so that it coincides with the optical axis 0.

Step 21> By performing the same operations as steps 16 and 17, 1 and K are marked as shown in FIG. Thereafter, it returns to the aforementioned position.

Step 22 In step 16, the comparison circuit 206 converts condition 0 to the ear side
When it is determined that both sides of the body are "unsatisfied", the sequencer 2 (13) controls the X-axis motor 2 as shown in Figure 6.
M is activated, and the lens is moved to position 1 based on the coordinate data (x, 1, yKl) of position 1 in the RAM 211.

Step 23> Next, the sequencer 2 (13) operates the Y-axis motor 11M, moves the lens in the distance direction until the conditional expression is satisfied, and places 9 (XK9, yK9) at the measurement point that satisfies the conditional expression 0. )
When coincides with optical axis 0, stop the Y-axis motor 11M,
A mark is placed on the measurement point via the driver circuit 202.

<Step 24> As shown in FIG. 6, the X coordinate xt of the mark point Ut, Ks
Read a predetermined distance a to ts from the ROM 212,
The arithmetic circuit 209 calculates the position KIO (XM9 as ygs) where (Xks a) is the X coordinate = Kra (XKI
Olyat. ), and the sequencer 2 (13) uses the pulse driver circuit 20 to move the lens to the KIO.
0 to operate the X-axis motor 12M.

Step 25> After moving the lens to position KIQ, move sequencer 2 (1
3) operates the Y-axis motor 11M to move the lens in order to find a measurement point in the near direction of the lens, and moves the lens with respect to the near vision addition power boundary value AK and the near vision cylindrical power boundary value C1. The measurement point is moved along the Y-axis direction until the addition power 1&ADD and the near cylinder power C-MC from the processing unit 207 based on the refractive property measurement values of the measurement point at each moment are satisfied. When the lens moves to a position that satisfies condition 0, the sequencer 2 (13) then reverses the Y-axis motor 11M to move the lens in the distance direction of the lens to find the measurement point,
Based on the refractive characteristic values moment by moment during the movement, the IJtq fixed point Kz (X*□, 1 in y) that satisfies the above condition is determined.
．． ) and mark the measurement point. At the same time, mark point position K ++ (XK11 s yMll
) is stored in the RAM 211.

Step 26> The arithmetic circuit 209 reads the X coordinate XK11 of the coordinate data (Xxz,'/*z) at the mark position in the RAM 211, and stores it in the ROM 212 as a constant tα in advance.
Based on the distance data a given (XKz +28
) = XK12 is calculated. Based on this calculation result, the sequencer 2 (13) operates the x+tb motor 12M and moves the lens so that the movement position K I 2 with the position coordinates (Xx+2 + 2a, 3'KI+) coincides with the optical axis O. let

Step 27> A mark is placed at position KI3 in the same manner as step 25 above.

Step 28> The comparison circuit 206 compares the magnitude of each y-coordinate yX9, y□1, y, 3 of 9, K%+I and K13 at the mark position, and as shown in FIG. 6, lyX11 1>! yxsl<
When l5'K13l, that is, the center mark position, is located furthest in the distance direction, the process proceeds to the next step 30. The comparison circuit 206 is iyK, 1>l yxs l
< l VX+3 1 , that is, as shown in FIG. 7, when it is determined that the mark position K13 on the ear side is located farthest from the distance direction, the process moves to step 31. Furthermore, the comparison circuit 206 calculates 1yxzl<IyKIll<1yi1,1
That is, as shown in FIG. 8, when it is determined that the fine measurement mark position 2Kz is closest to the continuous direction, the process moves to step 38.

Step 30> The sequencer 2 (13) connects the X other motor 12M and the Y other motor 11M to the RO via the pulse driver circuit 200.
9 (XK11, y
Drive control is performed based on the coordinate data of K9) to return the lens to the mark position.

<Step 31> The arithmetic circuit 209 selects the X position 45.1 at the location stored in the RAM 211. Add the distance stored in advance as a constant in the ROM 212 to XKl, and create a new movement position K14 (XKIb, yKI3) = KI4
Find (XX□4, VK14). This position K1
Based on the coordinate data of No. 4, the sequencer 2 (13) operates the X motor 12M, moves the lens to fine measurement, and
As shown in the figure, move the lens so that optical axis 0 is located at K14.

Step 32> Execute the same operation as step 25 described above and set the position K +
Mark 5.

Step 33> The comparison circuit 206 compares the mark position K + + marked in step 25 with the mark position '11 marked in the previous step 32.
The magnitude of the y coordinate y□1 of K + s and 31'KI5 is compared. The comparison circuit 206 is 1y1. 13/*
When it is determined that zl (marked with an X like K l 5 in Fig. 7), the process moves to the next step 34, and when it is determined that 1y Is l 〉l VK11 1, the process moves to step 35. do.

Step 34> The sequencer 2 (13) determines the mark position Kz of the RAM 211.
The coordinate data of (XKz, yXll) is read, and the X and other motors 12M and Y and other motors 11M are driven and controlled to return the lens to the marking point position K13.

Step 35> The arithmetic circuit 2 (13) reads the distance data c (c>b) stored in the ROM 212 as a constant in advance, and moves it to the new movement position by +5 (XK+C%yK+s) = +s (XKI6, yx+s) seek.

The sequencer 2 (13) drives and controls the X and other motors 12M based on this coordinate data of K16, and moves the lens to position K16.

Step 36> Execute the same operation as step 25 above, and
mark.

Step 37> Sequencer 2 (13) returns the lens to +3.

Step 38> The arithmetic circuit 209 reads out the constant stored in the ROM 212 and sets the new movement position K18 as shown in FIG.
(XK11 bSVKI+ > =K +e (X
X18, Vy+a), and sequencer 2 (13
) moves the lens to position K18.

Step 39> The same operations as in steps 32 to 37 described above are performed, and marks are placed at positions K19 and K20, respectively, as shown in FIG. Note that in this step, the mark position K l
9 y-coordinate y, 1. and the y-coordinate of the mark position K13, y□
, compare the size of .

When lyx+sl>ly□31, new position, K2O
2G (XKI + C+ Vats) = 2
This step differs from steps 32 to 37 described above in that ゜(Xmzo N yK2゜) is calculated. Thereafter, the lens is returned to the mark position RK + +.

This completes the marking of the near vision area, and moves on to the marking of the distance vision area from the next step 40 onwards.

Step 40
Or, when step 37 is executed, the sequencer 2 (13) is moved to the return position 13, and when step 39 is executed, the return position Kl+ is set as the starting point, and the sequencer 2 (13) is connected to the Y axis via the pulse driver circuit 200 as shown in FIG. Activate motor l1M.

As a result, the lens moves in the near vision direction, and a measurement point is found on the distance vision side of the lens. From the processing unit 207, the refractive characteristic value at the measurement point at every moment during lens movement, that is, the measured distance addition power ADD is inputted to the comparison circuit 206, and the -force measurement cylindrical power C1 is inputted to the calculation circuit 209. Arithmetic circuit 209
subtracts the reference distance cylindrical power MC obtained in step 11, which was stored in the RAM 211, from the measured cylindrical power C manually entered, and the result (C-MC) is sent to the comparison circuit 20.
Enter 6.

The comparison circuit 206 reads out the distance addition power boundary value Ae and the distance cylindrical power boundary value Ce that have been manually stored in the RAM 211, and compares the input value (C-MC) from the arithmetic circuit 209 and the distance addition power from the processing unit 207. From the power ADD, the addition power ADD of the measurement point of the moving lens and the cylindrical power difference (C-MC)
Determine whether or not satisfies, and if satisfied, sequencer 2 (
13) to that effect.

Step 41> The sequencer 2 (13) receives the “condition ■” from the comparison circuit 20G.
When a signal indicating "satisfied" is received, the Y-axis motor 11M is reversed via the pulse driver circuit 200, and the lens is moved in the opposite direction from the previous time so that the near direction of the lens becomes the measurement point.

The addition power ADD and the cylindrical power C for each measurement point from the processing unit 207 during this reversal movement are used to calculate the cylindrical power difference (C-MC) in the calculation circuit 209 in the same manner as described above. The comparison circuit 206 compares the addition power ΔDD and the cylinder power difference (C-MC
) as the distance addition power boundary value Δe and the distance cylindrical power boundary value C
It is determined whether or not it holds true by comparing it with e, and when it holds true, it outputs that fact to the sequencer 2 (13).

Upon receiving the command from the comparator circuit 206, the sequencer 2 (13) stops the Y-axis motor 11M to stop the lens movement, and marks the measurement point position E1 where condition 0 is satisfied via the driver circuit 202. Soft Totomoni EI (
D locus a (XEI, 3'EI > is stored in the RAM 211.

Step 42> The sequencer 2 (13) reads the distance d stored in advance as a constant from the ROM 212, and controls the X-axis motor 12M.
The lens is moved toward the ear side by the distance d so that the door side of the lens becomes the measurement point, and the moved position E2 is set as the measurement point.

<Step 43> The same operations as in steps 40 and 41 described above are performed, and a measurement point E3 that satisfies condition 0 is marked.

Step 44> The sequencer 2 (13) moves the lens to the body side by 2d, which is twice the distance d stored in the ROM 212, and sets E4 as the measurement point, and then executes the same operations as steps 40 and 41 described above. and mark measurement point E5.

Step 45> E marked in steps 41 to 44, ,
The y coordinates of E, and E, yEl, yey, 'lEs
and the distance in the Y-axis direction from the y-coordinate yxs of (or + , Kz or , ) to the mark point position in the near vision area '/x,
A calculation circuit 209 calculates Vss and Was. This calculation result is output to comparison circuit 206. The comparison circuit 206 is
'/a3 7
6, as shown in FIG. 9, V+:3<VE+
When <71i3, the process moves to step 48, and as shown in FIG. 10, when Vsz>y□>783, the process moves to step 4.
Move to 9.

Step 46> As shown in FIG. 5, the measurement point is moved further toward the ear side by a distance d, and E6 is set as the measurement point.

Then, perform operations similar to steps 40 and 4I,
E7 Mark. Thereafter, the lens is moved toward the ear by a distance of 4d from point E7, and E8 is set as the measurement point, and the same operations as steps 40 and 41 are performed to mark measurement point E.

Step 48> As shown in Fig. 9, move the lens along the Y-axis direction by a distance of 3d from the mark position E toward the ear side, and move the lens to the measurement point E on the body side.
get go. After that, perform the same operation as step 40.41, mark the measuring point E1, move the measuring point to the body side by distance d, set E12 as the measuring point, and step 40
．． 41, and mark measurement point E13.

Step 49> As shown in FIG.
Execute the same operation as above and mark Els. Further move to the measurement point E16 on the ear side and perform the same operation as in step 40.41 until the measurement point E l? mark.

By the above marking operation, as shown in FIG.
In other words, if the measured addition power ADD satisfies the near addition power boundary value AK, △DD≦AK, or the difference between the measured cylinder power C and the distance cylinder power MC (C-MC) is the near cylinder power A mark is placed on the boundary line 4 (10) where C-MC)≧CK for the power boundary value CK. This means that the area 410 surrounded by the boundary line 4 (10) is an area where rADD≧AX and (C-MC)≦CXJ. This area 410 is an area where near vision work can be done easily. For example, the near addition power is 1. For an oOD lens, for example, it is given by the following equation. Therefore, region 410 has an add power of 0.
This is a region where the cylinder power is 75 D or more and the cylinder power is 0.25 D or less. This area always includes a near vision measuring section 316 specified by the lens manufacturer.

In addition, as shown in FIG. 11, condition 0 is satisfied, that is, the measured addition power ADD is greater than or equal to the distance addition power boundary value Ae, or the measured cylindrical power difference (C-, MC) is equal to the distance cylindrical power boundary value Ce. A mark is also placed on the larger boundary line 402. The distance direction side of this boundary line 402 is ADD≦Ae and ((,
The region 420 satisfies MC)≦Ce, and is a region where distance work can be done easily. For example, the addition power ADD is 1.00 D
For example, if the equation (b) is taken as a boundary value, then the region 420 is a region where the add power is 0.33 D or less and the cylinder power difference is 0.33 D or less. In this area 420, there is always a distance measuring unit 313 specified by the lens manufacturer.

Second Embodiment Next, a second embodiment of the present invention will be explained based on FIG. 12 (FIG. 12) and FIG. 12 (CB). This embodiment has the same device configuration as the first embodiment described above, and the marking subroutine (step S-7 and step S-10) of the flowchart shown in FIG.
) are different. FIG. 12(A) shows only the marking subroutine.

The marking subroutine of this second embodiment will be explained below.

Step 2-1> Steps 1 to 14 of the marking subroutine of the first embodiment described above are executed.

Step 2-2> Seacare T2 (13) simultaneously supplies pulses to the X other motor 12M and Y other motor IM through the pulse driver circuit 200 in synchronization with each other, and moves the measurement point from position 1 to the state side. 45° direction.

Based on the measured addition power ΔDD and the measured cylindrical power C from the processing unit 207 at every moment while the lens is moving, the arithmetic circuit 209 and the comparison circuit 206 perform the step 15 described above (first embodiment).
The sequencer 2 (13) operates the point moving motor 30M via the pulse driver circuit 200, and then moves the point moving motor 30M to the measurement point via the driver circuit 202. Mark 2.

Step 2-3> In the sequencer 2 (13), the pulse driver circuit 200
Activate the other motor 12M and set the measurement point on the ear side as shown in Figure 12■
) is moved by a distance e as shown in FIG.

Note that the distance e is stored in advance in the ROM 212 as a constant.

Step 2-4> The sequencer 2 (13) supplies pulses to the X other motor 12M and the Y other motor lIM through the pulse driver circuit 200 in synchronization with each other, and drives them in a 45° direction in the near direction. Then move the measurement point.

The calculation circuit 209 and the comparison circuit 206 satisfy the condition 0 as in step 25 (first embodiment) from the measured addition power ADD and the cylinder power C that are input from the processing unit 207 every moment while the measurement point is being moved. Find the measurement point.

Step 2-5> The sequencer 2 (13) then reverses the X other motor 12M and the Y other motor 11M, and satisfies condition 0 by following the same route in the opposite direction of the movement route in step 2-4. Find the measurement point.

The X coordinate of the measurement point that satisfies condition 0 and the X coordinate Xkl of 1 at the maximum addition power position stored in the RAM 211.
The arithmetic circuit 209 calculates the difference (x
The comparator circuit 206 determines whether the signal (X, XKI) is positive or negative.

When this judgment is "correct", the process moves to step 2-7, and "
If "negative" or "equal", the process moves to step 2-6.

Step 2-6> The sequencer 2 (13) drives the dot moving motor 30M via the pulse driver circuit 200 to lower the dot base 32, and then excites the moving coil 34 via the driver circuit 202. , measurement point K with the center marking needle 35. mark.

Step 2-7> The sequencer 2 (13) calculates the xl and y coordinate values (X
KI, y, 1) is read from the RAM 211, and based on that value, the X and other motors 12M and Y and other motors 11M are driven to move the lens and return the measurement point to 1 at the maximum addition power position.

Step 2-8> The sequencer 2 (13) synchronizes and supplies the same number of pulses to the X and other motors 12M, 5 and the Y-axis motor 11M, and moves the measurement point toward the ear in a 45° direction.

Then, from the measured addition power ADD and the measured cylindrical power at every moment while the lens is moving, a measurement that satisfies condition 0 is found, and a mark 3 is marked at a measurement point that satisfies condition 0.

<Step 2-9> Execute the same operation as the above-mentioned steps 2-4 to 2-6, and find the measurement point Ke (e=4
．． 5. Mark or6). However, in this step, the "move 45 degrees to the ear side" step in step 2-5 above becomes "move 45 degrees to the ear side", and "x xx + > O
The difference is that the determination step for J is rx−xK+<OJ.

In steps 2-1 to 2-9 above, marking of the near vision area is completed.

Step 2-10> The sequencer 2 (13) selects the distance designated position E specified in the above-mentioned step 2 or step 5 (see the first embodiment).
The coordinate values (x68, y61) of are read from the RAM 211, and the X-axis motor 12tVI and Y-axis motor 11M are driven and controlled to move the lens to move the measurement point above El.

Step 2-11> Execute the same operation as step 2-2 and measure point E2.
mark.

Step 2-12> Perform the same operation as step 2-3 above to move the measurement point toward the ear. In addition, at this time, the moving distance is stored in advance in the ROM.
Let f be stored in 212. (It may be determined that f=e).

Step 2-13> The sequencer 2 (13) drives and controls the X-axis motor 12M and the Y-axis motor 11M to move the lens in order to move the measurement point along the 45'' direction in the distance direction.During lens movement A measurement point that satisfies the above-mentioned condition 0 formula (see the first embodiment) is searched from the momentary measured addition power ΔDD and measured cylinder power C.

Step 2-14> After finding a measurement point that satisfies condition 0, sequencer 2
In (13), the X-axis motor 12M and Y-axis motor 11M are reversed, and the movement route of step 2-13 is reversed to advance the measurement points to find a measurement point that satisfies the above-mentioned condition 0 formula (see the first example). .

The X coordinate of the measurement point that satisfies condition 0 and the specified distance position E,
The comparison circuit 206 determines whether the difference (x
16.

Step 2-15> Mark measurement points En (n=4, 6, or 8).

Step 1-16> Return the measurement point to the specified distance position WE+.

Step 2-17> Starting from the specified distance position E, the lens is moved to move the measurement point in the direction of 45 degrees toward the ear, and a measurement point E3 that satisfies condition 0 is marked.

Step 2-18> Execute the same operations as steps 2-12 to 2-15 to find a measurement point Ee that satisfies condition 0 (e=
5.7. Mark or9). However, in this step, the "ear side" in step 2-12 is set as "state side", the "machine side" in step 2-14 is set as "ear side", and rx Xi+
The difference is that >OJ is set to rx−XEI<OJ.

In the first and second embodiments described above, marks are placed in both the near vision area and the far vision area, but the present invention is not necessarily limited to this. It may be configured such that the execution 70- of the sequencer 2 (13) can be selected to execute the marking sequence only for the distance portion or only for the near portion as necessary. Furthermore, in each of the above embodiments, in the condition 0 formula or the condition 0 formula, the measured addition power ΔDD and the measured cylindrical power difference (C-MC)
Although both are compared with the boundary value, it is also possible to compare only the measured addition power.

Furthermore, in the above-mentioned embodiment, a mark was placed on a measuring point that satisfied the condition 0 or 0 for each measurement, but instead, the measuring point coordinate data that satisfied these conditions was temporarily stored in the RAM 211.
memorize everything. After the data of all measurement points have been taken in, only the marking operation may be performed intensively. In addition, the mark point position does not necessarily have to be on the measurement point, but as long as it is within the area that satisfies the conditional expression, the predetermined pressure #! , marks may be made at separate points. This means that in order to prevent the marking mark from being erased by the lens holding pin 25 while the lens is moving, the alignment relationship between the marking position and the lens holding pin 25 is calculated as the lens moves, and the measurement points are In other words, it is effective when determining marking points.

〔Effect of the invention〕

According to the present invention, it is possible to indicate the distribution area of the addition power required by the eyeglass wearer during near vision work by means of marks on the lens. For this reason, it is extremely easy to determine whether or not the lenses are correctly fitted in the glasses by checking whether the position of the wearing eye when wearing glasses with lenses marked with this mark is within the distribution area. can be determined.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the mechanical components of the lens marking device of the present invention, FIG. 2 is a block diagram showing the circuit configuration of the electrical control system of the lens marking device, and FIG. 3 is a lens marking device. 4(A) to 4@) are flowcharts showing the first embodiment of the mark subroutine of the flowchart in FIG. 3, and FIGS. FIG. 10 is a schematic diagram showing the state of marking points on the lens according to the first embodiment along with the movement route of the measurement point. FIG. , FIG. 12(A) is a flow chart diagram showing a second embodiment of the marking subroutine;
Figure 2) is a schematic diagram showing an example of the marking state on the lens according to the second embodiment along with the moving route of the measurement point, Figure 13 is a diagram showing an example of marking on an unprocessed progressive multifocal lens, Figure 14 The figure is a schematic diagram showing the relationship between a designated distance position and a designated near position. ■... Measurement optical system and detector 11... Y-axis path mechanism 12... X-axis feed mechanism 14.15... Hand 20... ... Lens holding section, 30 ... Mark section 2 (13) ... Sequencer 206 ... Comparison circuit 209 ... Arithmetic circuit 211 ... ...RAM 212...ROM Figure 3 Figure 5 Figure 6 Figure 7 Figure 8 Figure 9 Figure 1○ Showa Year Month Day

Claims (15)

[Claims] (1) A first step of measuring the add power within a certain region of the near vision part of the progressive multifocal lens and determining the maximum add power; a second step of determining a boundary value; a third step of measuring the addition power at a plurality of measurement points at least in the near vision section of the progressive multifocal lens; and a measured addition at the measured near vision section measurement points. A fourth mark is placed on or near a near measurement point in a region where the measured addition power is larger than the near vision addition power boundary value by comparing the power and the near vision addition power boundary value. A lens marking method characterized by comprising the steps of. (2) The second step further determines a near-sight cylindrical power boundary value based on the near-sight maximum addition power, and the third step further determines the cylindrical power at the near-sight measurement point. and the fourth step further includes comparing the measured cylinder power at the near measurement point and the near cylinder power boundary value;
Claim (1) characterized in that the mark is placed on or near the near measurement point in a region where the measured cylinder power is smaller than the near cylinder power boundary value. Lens marking method described. (3) The fourth step is performed on or on the measurement point within a region where the measured addition power is greater than the near addition power boundary value and the measured cylindrical power is smaller than the near cylindrical power boundary value. The lens marking method according to claim (2), characterized in that the marking is performed in the vicinity. (4) A first step of measuring the add power in a certain region of the near vision part of the progressive multifocal lens to determine the maximum add power; and determining at least the near vision addition power based on the maximum add power of the near vision part; a second step of determining a boundary value; a third step of measuring the addition power at a plurality of measurement points at least in the near vision section of the progressive multifocal lens; and a measured addition at the measured near vision section measurement points. A fourth mark is placed on or near a near measurement point in a region where the measured addition power is larger than the near vision addition power boundary value by comparing the power and the near vision addition power boundary value. a fifth step of calculating a boundary value of addition power in the distance part based on the maximum addition power in the near part; and a step of measuring the addition power at a plurality of measurement points in the distance part of the progressive multifocal lens. a sixth step; comparing the measured addition power at the measured distance measurement point with the distance addition power boundary value, and a region where the measured addition power is smaller than the distance addition power boundary value; A lens marking method characterized by comprising a seventh step of marking on or near the distance measurement point located within the lens. (5) The fifth step further determines a distance cylindrical power boundary value based on the near maximum addition power, and the sixth step further measures the cylindrical power at the distance measurement point. and the seventh step further includes comparing the measured cylinder power at the distance measurement point and the distance cylinder power boundary value,
Claim (4), characterized in that the mark is placed on or near the distance measurement point in a region where the measured cylinder power is smaller than the distance cylinder power boundary value. Lens marking method. (6) The seventh step is performed on or near the measurement point within a region where the measured addition power is smaller than the distance addition power boundary value and the measured cylindrical power is smaller than the distance cylindrical power boundary value. The lens marking method according to claim (5), wherein the marking is performed on a lens. (7) If the comparison with the cylinder power boundary value in the seventh step shows that the lens has a distance cylinder power (MC), the distance cylinder power (MC) is subtracted from the measured cylinder power (C). The lens marking method according to claim (5) or (6), characterized in that the method is performed for the difference (C-MC). (8) Measuring means for automatically measuring the addition power of a plurality of near-sight section measurement points at least in the near-sight section of a progressive multifocal lens; Measurement of the near-sight section measurement points measured by the measuring means; Selection means for selecting a near maximum addition power from the addition power; Boundary value determining means for determining a near vision addition power boundary value based on the near vision maximum addition power; and a boundary value determining means for determining a near vision addition power boundary value based on the near vision maximum addition power; a comparison means for comparing the power with a power boundary value; 1. A lens marking device comprising a marking means for marking. (9) The measuring means is further configured to measure the cylindrical power of the near measurement point, and the boundary value determining means further determines the near cylindrical power based on the near maximum addition power. the comparison means is further configured to compare the measured cylinder power with the near cylinder power boundary value, and the marking means further comprises: The comparing means is configured to place a mark on or in the vicinity of the near-sight measurement point having the measured cylinder power determined to be within a region smaller than the near-sight cylinder power boundary value. A lens marking device according to claim (8). (10) The marking means determines, by the comparison means, that the near portion measured addition power is greater than the near addition power boundary value, and the near portion measurement cylindrical power is smaller than the near cylindrical power boundary value. The lens marking device according to claim 9, characterized in that the marking point is placed on or near the near measurement point determined to be within the area. (11) The measuring means is further configured to measure the addition power at a plurality of measurement points in the distance portion of the progressive multifocal lens, and the boundary value determining means further includes the near maximum addition. The distance vision part addition power boundary value is determined based on the power, and the comparing means further compares the measured addition power of the distance vision part measurement point and the distance vision part addition power boundary value. and the marking point means is further arranged on the distance part measurement point having the measured addition power determined by the comparing means to be within a region smaller than the distance part addition power boundary value. The lens marking device according to any one of claims (8) to (10), characterized in that it is configured to mark at or in the vicinity thereof. (12) The measuring means is further configured to measure the cylindrical power of the distance measurement point, and the boundary value determining means further determines the distance cylindrical power based on the near maximum addition power. The comparison means is further configured to compare the measured distance cylindrical power with the distance cylindrical power boundary value, and the marking means Further, the comparison means places a mark on or near the distance measurement point having the distance measurement cylinder power that is determined to be within a region smaller than the distance measurement cylinder power boundary value. A lens marking device according to claim (11), characterized in that the lens marking device is constructed as follows. (13) The marking means determines that the distance part measured addition power is smaller than the distance addition power boundary value by the comparison means;
and a mark is placed on or near the distance measurement point where the distance measurement cylindrical power is determined to be within a region smaller than the distance cylindrical power boundary value. (12) The lens marking device described in item (12). (14) The comparison means may be configured such that the lens has a distance cylindrical power (M
C), the near cylindrical power boundary value is calculated from the near measured cylindrical power (C) to the distance cylindrical power (MC).
Claims (8) to (1) are configured to compare the difference (C-MC) obtained by subtracting the difference (C-MC).
3) The lens marking device according to any one of the items. (15) The comparison means may be configured such that the lens has a distance cylindrical power (M
C), the distance cylinder power (MC) is determined from the distance cylinder power boundary value and the distance measurement cylinder power (C).
) The lens marking device according to any one of claims (11) to (14), characterized in that it is configured to compare the difference (C-MC) obtained by subtracting the difference (C-MC).