JPS61120938A - Automatic alignment apparatus lens to be inspected of lens meter - Google Patents

Abstract

PURPOSE:To obtain an apparatus for a lens meter which can automatically perform alignment of lenses to be inspected without depending on manual work of an operator by including two hands, a hand interval altering means and a hand movement control means. CONSTITUTION:When a lens to be inspected is placed on a lens table 532, with the rotation of an arm drive motor 522, hands 530 and 531 move to narrow the interval therebetween because of a crossing structure of arms 526 and 527 thereby grasping the edge of the lens.then, a lens holding ring at a lens holding section lowers to press the lens surface. Under such a condition, as a Z-axis feed motor is rotated, a Z-axis table 501 lowers and hence, the lens lowers as grasped between the hands 530 and 531 to have the back thereof abutting on a lens holding pin. The lens thus held is moved in the direction Y together with an X-axis base with the rotation of a Y-axis drive motor 502 while being done together with an arm base 520 in the direction X with the rotation of an X-axis drive motor 504.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an automatic lens alignment device for a lens meter for measuring the refractive properties of eyeglass lenses or contact lenses.

[Conventional technology]

In recent years, so-called automatic lens meters that automatically measure the refractive properties of spectacle lenses, such as spherical refractive power, cylindrical refractive power, their axial angles, and prismatic refractive power, have been developed and put into practical use. However, even with this automatic lens meter, when measuring refractive characteristics, the so-called alignment work of aligning the optical center or point of optical action of the lens to be measured with the measurement optical axis still had to be done manually by the measurer.

[Problems to be solved by the present invention]

This manual alignment work is extremely complicated, and even if the measurement of refractive angle characteristics is automated and speeded up, the alignment work takes time, and in the end, the measurement time including the alignment work is longer than that of a conventional manual lens meter. The problem remained that there was almost no difference.

Furthermore, if the alignment work is inaccurate, the measured refractive properties will include errors, so the work requires accuracy, which makes the alignment work even more difficult.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an automatic alignment device for a lens meter that automatically aligns a lens to be tested without relying on the manual work of a measurer.

Another object of the present invention is to automatically mark the optical center, the position of the optical action point, and, if necessary, the cylindrical axis angle, on the lens to be tested after the refractive characteristic measurement is completed. An object of the present invention is to provide an automatic alignment device that is an important component of the automatic marking device.

[Means for solving problems]

The structural features of the present invention for solving such problems are as follows:
A test lens alignment device that is movably held in a plane substantially perpendicular to a measurement optical axis of a lens meter by a lens receiving member and a lens holding member that cooperates with the lens holding member, wherein the test lens alignment device at least two hands each having an inner surface for abutting on and pinching a surface, a hand distance changing hand for changing the distance between the hands, and a refractive characteristic measurement result of the lens to be tested. and a control means for controlling the hand moving means.

〔Effect of the invention〕

According to the present invention having the above-described configuration, it is possible to automate the alignment work, which was conventionally complicated and required a lot of work time and high alignment accuracy. We can provide automatic lens alignment equipment.

Furthermore, since the alignment work can be performed quickly and accurately, it is possible to provide a fully automated automatic lens meter that can shorten the overall measurement time for the lens to be tested and ensure the accuracy of the measurement results.

〔Example〕

(1) Principle of construction of the embodiment First, the principle of operation of this embodiment will be explained. When the optical axis 1 of the test lens N coincides with the optical axis of the measurement optical system of the lensmeter, the focal point of the test lens is at a point F on the optical axis, as shown in Fig. 1(a). Located in However, if the optical axis β of the test lens is misaligned with the optical axis of the lensmeter, that is, if the optical center of the test lens N is misaligned, the test lens The focal point F of the lens N is located off the optical axis on a plane P perpendicular to the optical axis of the lensmeter, separated by the focal length of the lens N to be tested. The amount of deviation between the focal point F and the optical axis of the lensmeter can be calculated by considering the XP -yp orthogonal coordinate system with the origin 0 as the passing point of the optical axis on the P plane, as shown in Figure 2. , , P, which are generally treated as prism quantities. Here, when measuring the amount of prism refraction with a lens meter using the origin 0 of the P plane as the measurement point, the results are P8 (if it is a lens for the right eye, the amount of refractive power of the prism is P, ), -Py (the amount of refraction of the prism is P, with the base down), The refractive power Pa) is measured. In this case, (P,.

-P, ) is the optical center of the lens to be tested. In reality, the prism refractive power is calculated by allowing a ray of light parallel to the optical axis to enter an optical system, and the ray that has passed through the optical system exits the optical system at a position 1 m away from the incident position of the incident ray. A case where there is a deviation of cm is defined as one prism diopter. That is, the prism refractive power is the amount of light beam deflection of the optical system. In order to find the optical center of a test lens that you want to align or mark with a lens meter, you need to determine the geometric length, which is how many centimeters the optical center is geometrically shifted from the test lens measurement point. It is necessary to know. For a test lens having only spherical refractive power, as shown in Fig. 3, when the refractive power of the test lens N is Dl, the prism refractive power in the X direction is Pi, and the prism refractive power in the Y direction is Py. , If the amount of geometric deviation between the measurement point O1 on the test lens and the optical center H on the test lens is in the X direction, and in the y direction, then generally P, = D; h , p, = D −hy
--There is the relationship (1). From this, we can find h i and hy. Therefore, in the lens meter, the amount of deviation hX1h7 of the measurement point of the test lens from the optical center position is calculated from the measured values of the spherical refractive power value and the prism refractive power value at arbitrary points of the test lens using equation (2). ,h, ,
By moving the lens to be tested by h, the optical axis of the lens meter and the optical axis l of the lens to be tested can be aligned, making it possible to make accurate markings. In addition, when marking the geometric center of the prism-processed test lens N, the geometric center G is from optical center 0 to PX
It has a prism amount of SPY. it is conceivable that. When this test lens N is measured at an arbitrary measurement point M, if the prism measurement quantity is P or p, the geometric center G to be aligned or marked is calculated from equation (2). Ru. Also, this lens to be tested is Px, Py
This is a rectangular coordinate display (generally, the base direction is expressed using the terms base in, base out, base out, and base down), and a polar coordinate display that displays the combined prism amount P and its base direction as an angle θ. If given as Px-”Pcosθ, PY = Psinθ (4)
The above method can be used after performing polar coordinate-orthogonal coordinate transformation. In addition, when the optical center of the lens is decentered from the optical axis of the presbyopia to be worn and a prism prescription is performed using the prism effect of the lens, the above-mentioned geometric center G is set as the passing point of the optical axis of the presbyopia to be worn. If we consider it as a point of optical action),
The above idea can be used as is.

In the explanation so far, the refractive power of the test lens is calculated using D as an approximation in the case where only the spherical refractive power or the cylindrical refractive power is extremely small compared to the spherical refractive power. However, in order to more accurately align or mark points, the following can be calculated from the spherical refractive power, cylindrical refractive power, and their axis angles measured by an automatic lens meter, and the pure prism measurement quantities unrelated to these quantities. method to calculate the relationship between the measurement point and the optical center.

The refractive properties of the test lens measured by an automatic lens meter are as follows: Spherical refractive power S Cylinder refractive power C Cylinder axis angle θ Horizontal prism amount P8 Vertical prism amount P.

Then, the optical center O of the lens to be tested is calculated by S·(S+C), as shown in FIG.

In addition, in the case of prism-processed lenses or prism prescriptions, the amount of lens movement hi, h,
The beam is calculated as: = S・(S+C) hy=S・(S+C) −·−·············(6).

In the above explanation of the principles of alignment or marking points, the amount of movement (h-
, h, ) was calculated by calculation, but the amount of movement (h, ,
Instead of calculating h, ), the test lens may be aligned using a feedback method. That is, when aligning the optical center of the lens to be tested with the optical axis of the lensmeter, the amount of prism (p, , p, ) is measured moment by moment with the measurement system of the lensmeter, and the amount of prism is P8=0, Py The lens to be tested is moved so that =0. In addition, in the case of prism processed lenses or prism prescriptions, the prism measurement amount (P,
, P, j) is the desired prism value (P, , P,
) and P, =PXSP, =Py.

(2) General structure of lens meter FIG. 6 is a diagram schematically showing the structure of the lens meter according to the present invention. This lens meter includes a light emitting section 1, a detection optical system 2, a marking section M, and a detection optical An arithmetic control section E calculates the refractive characteristics of the test lens based on the measurement data obtained from the system 2 and controls the mark 8M, and the refractive characteristic values and alignment of the test lens determined by the arithmetic control section E. and a display device DP for displaying the status. Please refer to Japanese Patent Application No. 85490/1987 for a detailed explanation of the method of measuring the refractive properties of a lens to be tested using this lens meter. The marking point IM is composed of a lens holding section 10, a marking mechanism section 30, and an alignment section 50.

The lens 4 to be tested is held by an alignment section 50.

(3) Alignment section The configuration of the alignment section 50 will be explained with reference to FIGS. 7 and 8. The Z-axis table 501 has two slide pins 509 and two feed screws 510 and 511 on its back surface. The slide bin 509 is fitted into a guide hole (not shown) formed in a pedestal 513 of a housing part (not shown) of the lens meter main body so as to be able to slide up and down (
Figure 7B). On the other hand, the feed screws 510 and 511 are rotatably installed in the Z-axis table 501.
0 is a Boo! that is rotatably supported on a pedestal 513. J-5
It is screwed into the acid threaded portion 512b of 12a. Similarly, the feed screw 511 is screwed into the threaded portion 512d of the pulley 512C. A timing belt 516 is passed between both pulleys 5.12a and 512C. Further, a gear 512e is formed below the boo U-512a, and this gear 512e meshes with a drive gear 515 attached to the Z transport motor 514. As a result, when the motor 514 is rotated, the pulley 512
a, 512C are rotated at the same time, and the feed screws 510.51
1 is moved up and down, and as a result, the Z-axis table 501 can be moved up and down. Further, in front of this Z-axis table 501 (on the lower side in FIG. 7A), a lens table 532 on which the lens to be examined 4 is placed protrudes. The lens table 532 is formed with an opening 532a through which the lens receiving member 541 of the detection optical system 2 of the lens meter can pass.

A Y-axis base 506 is formed on one side of the Z-axis table 501, and flanges 506a and 506b are formed extending outward from both ends of this base 506, and these flanges 506a.

A Y-transport screw 505 and a Y-axis guide rail 507 are held between 506b. The Y transport screw 505 is rotated by a Y transport motor 502 attached to the flange 506b. This feed screw 505 is connected to a flange portion 503 on one end side of an X-axis base 503 placed on a Z-axis table.
It is screwed onto the acid screw in a. Furthermore, the Y transport guide rail 507 passes through this flange portion 503a,
It guides the movement of the X-axis base 503 when the feed screw 505 rotates due to the rotation of the motor 502.

The X-axis base 503 has a flange 503b on the opposite side to the flange 503a, and an X-axis feed screw 508a and an X-axis guide rail 508b are passed between the flanges 503a and 503b.
It is rotated by an X-axis feed motor 504 attached to a (FIG. 7B). The feed screw 508a is attached to the arm base 52
The feed guide rail 508b passes through the arm base 520 and guides the movement of the arm base 520 due to the rotation of the feed screw 508a caused by the rotation of the motor 504.

The arm base 520 has a flange 521 that extends to the left and right.
and a boo IJ-5 on the left side of this flange 521.
24 is rotatably supported on a shaft, while an arm drive motor 522 having a boot IJ-523 is attached to the side of the cloth.

A timing belt 525 is endlessly connected to both pulleys, and a hand arm 52 is attached to this belt 525.
6.527 are mounted to move in opposite directions. The hand arms 526 and 527 each have an arm guide rail 532.5 provided on the flange 521.
33 so as to slide on it. The hand arms 526 and 527 are extended so as to intersect at the middle part,
Eyeglass frame abutment surfaces 528 and 529 are formed from a vertical plane at each tip. Knots 530 and 531 protrude forward from the bottom of each of the abutment surfaces 528 and 529.

The configuration of the hands 530 and 531 is shown in FIG. 8(C). Since the hand 530 and the node 531 have mirror symmetry with each other, only the configuration of the hand 530 will be described.

The glasses frame abutting surface 528 has a hand piece support pedestal 601 formed to protrude forward from its lower part. A support pedestal 601 is formed with a support 602 having legs extending upward in the middle thereof, and slots 7) 603 are formed in the vertical direction in the legs of this support 602, and a flat head screw is inserted into this slot 603. 604 is slidably inserted. A flat head screw 604 is implanted in the hand piece 600, so that the support 602 supports the hand piece 600 within the slot 603 so as to be rotatable and vertically movable.

In addition, an opening 606 is provided on the top surface 605C of the hand piece 60 (l).
is formed, and when the hand piece rotates or moves up and down, the support column B
602 is configured to obtain a head space.

The side portion of the hand piece has a first contact surface 605a and a second contact surface 6.
05b, and both optical contact surfaces are perpendicular planes and have a shape that intersects in a V-shape. Upper surface part 605 of hand piece
The outer surface 605d of C is formed as a slope that opens outward toward the front. Furthermore, pins 607, 607 are planted on the upper surface of the support base 601, and springs 608, 608 are fitted into these pins. spring 608.608
The upper end is in contact with the lower surface of the hand piece 600.

Next, the mechanical operation of the alignment mechanism 50 having the above configuration will be explained.

First, the alignment operation for an unmolded lens will be explained. When the lens 4 to be tested is placed on the lens table 532, the belt 525 is rotated by the rotation of the arm drive motor 522.
is driven. When Boo J-523 is rotated counterclockwise in FIG. 7B, hands 530 and 531 move in a direction to narrow the distance between them because their arms 526 and 527 have a crossing structure, and grip the edges of the lenses. This will hold the lens in place. The reason why the arms 526 and 527 have a crossed structure is to reduce the amount of movement of the hand required to hold the lens. Next, lens holding part 1 which will be described later
The lens holding ring No. 0 descends and presses the lens surface.

When the morph 514 is rotated in this state, the pulley 51
2a and 512C rotate, and the Z-axis table 501 descends. Therefore, the lens is lowered while being held by the hands 530 and 531, and its back nine surfaces are attached to the lens receiving member 53.
Three lens holding pins 54 forming a measurement reference plane 540 of 1
2 and further lowers the lens table 532, but the lens is held on the lens holding pin 542. The lens held by the hands 530 and 531, the lens holding pin 542, and the lens presser is moved in the Y direction by the rotation of the Y-axis guide screw by the Y-axis drive motor 502. The arm base 520 is moved in the X direction by the rotation of the X-axis feed screw 508a caused by the rotation of the X-axis drive motor 504, and thereby the arm base 520 is moved in the X direction. The lens to be tested is mainly held by the clamping force between the lens holding pin 542 and the lens holding ring, and the hands 530 and 531 act to apply force to move the lens in the X and Y directions during alignment adjustment.

Hand piece 600.60 that holds the lens when moving the lens in the X and Y directions on this lens holding pin 542
1 receives rotational force from the upper and lower blades, and includes a slot 603 and a flat head screw 60 that rotatably slides within this slot 603.
4, the hand piece can be rotated and moved up and down as shown in FIG. 11, so that these forces can be absorbed.

FIG. 12 is a diagram showing a method of holding a lens in a spectacle frame by this alignment section. Hand piece 600
．． The eyeglass frame FM is placed on the upper surface 605C of the 601, and the eyeglass frame FM is placed on the upper surface 605C of the 601.
The lower end of the lens frame FR of the eyeglass frame is brought into contact with the inner surface of the temple FT of the eyeglass frame, and the eyeglass frame thrust surface 528
．． 529, and the outer surface and the abutment surface position the eyeglass frame relative to the hand. Since the outer surface 605d has a sloped configuration as described above, it is possible to maintain the size of the lens frame FR of the frame and the mounting position of the temple FT even if the position differs from frame to frame. Also, the outer surface 605d is the frame contact surface 528.52.
Since it is inclined in the direction of 9, it acts so that the lens frame FR of the frame always comes into contact with the contact surfaces 528 and 529. Lens receiving member of this eyeglass frame lens 4
X for holding method and alignment on 541,
The method of moving in the Y direction is the same as in the case of the unmolded lens described above.

FIG. 9 is a diagram showing a modification of the lens abutting surface of the hand piece. In this embodiment, the lens abutting surface 610a has a sloped structure that expands downward. As a result, as shown in FIG. 13, the lens contact surface 61 of the hand piece when the lens moves in the X and Y directions
Since the contact points between Oa and the edge of the lens 4 are at points T and T', the edge of the lens on the lens contact surface can easily escape and no undue force is applied to the lens to be tested.

Figures 10 to 10 fc1 are diagrams showing still other embodiments of the hand. In this example, arm 5
By making 26.527 into a partially rotating arm configuration,
The rotating arm absorbs the rotational force applied to the hand piece and the upper and lower blades when the lens is eccentric. Arm 5
26 and arm 527 have a mirror-symmetrical structure, only arm 526 will be described. The arm 526 has a rotating arm 526a, and both include a shaft member 621 implanted in the rotating arm 526a, and an arm 5 into which the shaft member 621 is rotatably fitted.
26 and a bearing 622 formed on the shaft 26. A restriction pin 623 is implanted on the side surface of the end portion of the shaft member 621 .

This pin 623 is located within the notch 624 of the arm 526, and by coming into contact with the side surface of the notch 624, the rotating arm 526
The rotation angle of a is limited within a desired range. The other end side of the rotating arm 526a has a glasses frame abutting surface 528 and a hand 530 similar to the above embodiment. In this embodiment, the upper and lower blades to the hand piece 600 are provided by the rotary arm 52.
6, the slot 603 is not necessarily necessary and a general rotation bearing structure may be used, examples of which are shown in FIGS. 13 to 15.

In the above-mentioned embodiment, the main purpose of the hand is to hold the lens to be examined or the eyeglass frame, and the arm-based X-
Although the lens to be tested is aligned by moving within the Y plane, the hands themselves may be configured to move independently in the X-Y directions.

(4) Lens holding part and marking part FIG. 14 to FIG. Lens holding part 10
has a vertically movable base 101, and this vertically movable base 101
Flanges 102 and 103 are formed at intervals, and
A guide rail 10 is provided between these flanges 102 and 103.
4.105 are passed in parallel. This rail 104.
105 is inserted into the bearing part 106a of the lens holding table 106, and this bearing part 106a has a linear bearing structure, and the rail 10 of the lens holding table 106 is inserted into the bearing part 106a.
4.105 is configured so that vertical movement can be performed smoothly. There is an L-shaped lens presser support at the tip of the lens presser table 106! E, 107 is formed, and a lens holding ring 108, which will be described later, is attached to the tip thereof. Further, a driving boob IJ-109 and a driving boob IJ-110 are rotatably attached to the vertically movable base 101. Drive boo IJ-109 is base 101
It is driven by a lens presser vertical motor 111 attached to the lens presser. Steel belts 112 are passed around the pulleys 109 and 110, and both ends of the belts are fixed to the upper and lower sides of the lens holding table 106. As a result, when the drive boob IJ-109 is rotated by the motor 111, the table 106 is moved up and down. In order to move the table up and down more smoothly and with a smaller driving force, in this embodiment, a pin 113 is installed on the side of the base 101, and a pin (in the figure) is installed on the side of the table 106. A tension coil spring 114 is stretched between the two (not visible) to maintain balance with the weight on the table 106 side.

A marking portion 30 is obliquely fixed on a lens holding table 106. Flange 302 of base 301 of marking portion 30
．． Two parallel guide rails 304.30 between 303
5 is provided, and the mark section table 3 is placed on this rail.
06 is slidably mounted. The bearing section of this marking section table 306 also has a linear bearing structure similar to that of the lens holding table 106 described above, and the bearing section of the marking section table 306 has a linear bearing structure.
4.305 is configured to allow smooth movement. The base 301 is connected to a drive pulley 308 that is rotated by a motor 307 for moving the marking part chifurle 306.
and a pulley 309, a steel belt 310 is stretched between the two pulleys, and both ends of the steel belt 310 are connected to the table 30.
It is fixed to the side of 6. As a result, the motor 307
The table 306 can be moved along the rails 304 and 305 by the rotation.

A pin 311 is installed on the lower side of the table 306, and a pin 312 is installed on the lower side of the base 301, and a tension tensioner is installed between both bottles to balance the weight with the table side. A coil spring 313 is tensioned.

A flange 315 is formed on the table 306,
A marking needle unit 316 is rotatably supported on this flange 315 . A boot U-318b is attached to the end of the rotating shaft of the marking needle unit 316. Further, a mark unit rotating motor 321 is attached to the lower surface of the flange 315, and a drive boo IJ-318a is attached to the rotation shaft of the motor 321 for rotating the mark unit.
is installed. A mini chair rope 319 is hung between the two Boo'Js 318a and 318b, and both ends of the rope are fixed to springs 320 to obtain tension.

Furthermore, a mark section table 30 is provided at the lower end of the base 301.
The ink tip 323 is attached so as to correspond to the marking needle of the marking unit 316 when the marking needle 6 is in the initial position.

This ink pad 323 has an ink storage member 324 made of felt or the like.

The lens holding ring 108 is a horseshoe-shaped holding pin holding plate 121.
A total of three lens holding pins 120 are held at the center and both ends of this holding plate. Lens holding pin 120
As shown in FIG. 15, the lens holding pin 123 has a collar 123a inserted into a hole 122 formed in a holding plate 121, a cylinder 124, and a pressing spring 125 interposed between the collar 123a and the bottom surface of the cylinder. The pin 123 is always pressed downward. With this configuration, when holding the lens 4 in cooperation with the lens holding pin 542 of the alignment section 50, the lens holding pin 123 can press the front surface of the lens, no matter what curve it has.

The 16th prisoner figure to the 16th FCI figure is the mark unit 31
FIG. 6 is a diagram showing the configuration of No. 6; The marking unit 316 includes three marking needles 317 arranged in a straight line and a marking needle holding member 318 that holds the marking needles 317 . Holding member 31
8, a notch 319 is formed so that when the unit 316 is rotated by the rotation of the motor 321, the rotation is not blocked by the column 107. The marking needle 317 is the needle 320
It is composed of a collar 321 and a magnet part 322,
It is inserted into a cylinder 325 formed in the support member 318. An electromagnetic induction coil 326 is built into the upper part of the cylinder 325, and the magnet part 322 of the marking needle is inserted into this coil. A pressure spring 327 is interposed between the collar 321 and the bottom of the cylinder, and acts to constantly push the marking needle 317 upward.

The mechanical operation of the lens holding part IO and the marking part 30 having the above configuration will be explained. In the initial state, the lens holding table 106 is in contact with the flange 102 of the vertically movable base 101, and the mark table 306 is in a position where it is in contact with the flange 302 of the base 301. The motor 111 is rotated counterclockwise in response to a command to hold the lens 4 to be tested, and the lens holder table 106 is lowered, whereby the mark portion 30 and the lens holder ring are simultaneously lowered, and the lens holder f is lowered.
The lens holding pin 120 of f1108 comes into contact with the lens 4 and works together with the lens holding pin 542 of the alignment section 50 to hold the lens 4 between them. Next, when marking the optical axis l of the lens after completing the alignment with the optical axis of the lens meter and the measurement of the refractive characteristics, first energize the electromagnetic induction coil 326 of the marking unit 316 according to the marking command. The marking needle 317 is lowered against the pressure spring 327 and the ink stored in the ink fountain 323 is transferred to the needle 32.
Attach it to the tip of 0. Next, rotate the motor 307 counterclockwise to move the mark table 306 to the flange 303.
lower it until it touches the As a result, marking unit 3
16 is 316 as shown by the imaginary line in Fig. 14fA1.
’ position.

At this time, the center marking needle 317 coincides with the optical axis of the lens meter. Next, rotate the motor 321 to obtain the desired rotation angle.
That is, the marking unit is rotated to the angle of the cylindrical axis of the lens to be tested, the coil 326 is energized, the needle 320 is placed on the lens 4, and a marking mark is formed on the lens surface.

Figure 17 and Figure 17iB1 show a first modified example of the lens holding part 10 and marking part 30, and an example in which the marking part 30 is configured to move in a direction perpendicular to the moving direction of the lens holding part 8 (S10). Components that are the same or equivalent to those in the above-described embodiment are designated by the same reference numerals, and a description thereof will be omitted.

FIG. 18 and FIG. 18FB1 are diagrams showing still another modification, and this embodiment is an embodiment in which the marking part 30 is rotated with respect to the lens holding part 10. A motor flange 353 of the lens holding table 106 is attached with a motor 352 for rotating the mark portion.
A gear 354 is fixed to the rotating shaft. On the other hand, a bearing portion 315a of the flange 315 is rotatably supported by a shaft 350 implanted in the table 106.

A gear 351 that meshes with a gear 354 is fixed to the bearing portion 315a. With this configuration, the marking unit 316, which was initially moved out of the measurement optical path of the lens meter,
By rotating the motor 352 clockwise, the flange 315 is rotated counterclockwise, and the marking needle 317 is positioned so as to coincide with the measuring optical axis as shown in the figure.

Furthermore, the marking unit 316 is not necessarily limited to the configuration in which it has three marking needles and is rotated about the axis of the central needle as the rotation axis, as in the above-described embodiment. There may be two marking needles and the marking unit may be configured to rotate freely around the axis of one needle, or one marking needle may be configured to move on a rail perpendicular to the rotation axis. You can also use it as

Further, in the above-described embodiment, ink is stored in an ink fountain and the ink is applied to the tip of the needle, but if the marking needle itself is of an ink storage type, such as a felt-tip pen structure, an ink fountain is not necessarily required.

It may also be configured to be movable on a rail perpendicular to the rotation axis.

Furthermore, in the above-described embodiment, ink is stored in an ink fountain and the ink is deposited on the tip of the needle, but if the marking needle itself is of an ink storage type, such as a felt-tip pen structure, an ink fountain is not necessarily necessary.

The control and operation sequences shown in FIGS. 19 to 21 rgJ are as follows.
22 is a block diagram showing the configuration of an arithmetic control unit E for controlling the marking device, and FIG.
FIG. 4 is a flowchart showing the operation sequence.

The configuration and operation of this arithmetic control section will be explained below according to the steps of the flowchart.

1) In the case of eyeglass lenses The flowchart shown in Figure 22 is for unprocessed eyeglass lenses.
It is a flowchart of alignment and marking operation mainly when the lens to be tested is a single lens. The measurer sets the measurement mode changeover switch 1402 to the single lens side S.

Step 1-1 = The sequencer 1000 is connected to the initial control circuit 110 via the signal line 1309 by the ○N command of the switch 14D2.
Give the operation command to 8.

As shown in FIG. 20, the initial control circuit 1108 connects the arm drive control circuit 11 via a signal line 1212.
A signal is manually input to the 12 OR circuits 1152. OR circuit 1
152 is a voltage generating circuit 114 via a signal line 1214.
9 is activated and a positive voltage is applied to the operational amplifier 1140, the arm drive motor 522 consisting of a DC motor is rotated forward or reverse via the driver circuit 1132. Further, the voltage generating circuit 1149 is configured to rotate the arm drive motor 522 in the reverse or normal direction by applying a negative voltage to the operational amplifier 1140. Voltage generation circuit 1
The magnitude of the positive and negative voltages on signal line 1214.1 determines the drive current of arm drive motor 522.
The drive current of the motor 522 is controlled by the logic signal applied to the motor 215 to obtain positive and negative drive torques. Therefore, in this embodiment, the control is performed using two signal lines 1214 and 1215, but by increasing the number of control lines, the output voltage of the voltage generating circuit 1149 can be multi-leveled in positive and negative levels, and the drive obtained by the motor 522 can be increased. The torque can also be set in multiple stages.

This circuit configuration principle is explained later in the control circuit 1110.111.
1 voltage generation circuit 1150.1151 and operational amplifier 1
The same applies to 141.1142.

Voltage generating circuit 1149 receiving a signal from signal line 1214
is the motor 52 to open the hand 530.531.
The operational amplifier 1140 generates a voltage that causes the motor 522 to rotate clockwise (this rotation direction is positive rotation) (this voltage is a positive voltage).
to open the hands 530 and 531 to the maximum extent.

When the hand is opened to the maximum, the voltage generated in the current detection resistor R1 activates the comparator 1143, and a pulse output from the signal line 1202 notifies the sequencer 1000 that the hand is opened to the maximum.

Next, initial control circuit 1108 ft, hand 53
In order to match the virtual center created by 0.531 with the origin position (on the measurement optical axis of the lens meter), the X-axis drive motor 504,
Y@[lIl Drive motor 502 reads data on the required number of pulses and provides it to driver circuits 1135 and 1136 via signal lines 1310 and 1311. The driver circuits 1135 and 1136 convert the pulses from the pulse generators 1114 and 1115 to the drive motor 504 based on the respective supplied pulse number data.
, and is supplied to the X-axis drive motor 502 to drive it.

The initial control circuit 1108 is the driver circuit 113
When the pulse supply to 5.1136 is finished, the sequencer 1000 is notified of the end of the operation via the signal line 1380.

Step 1-2: Place the lens 4 to be tested on the lens table 532, and turn on the start switch 1401.

Step 1-3: The sequencer 1000 operates the OR circuit 1153 via the signal line 1201 (FIG. 20).

At this time, since the signal from the initial control circuit 1108 is not input to the OR circuits 1152 and 1153, only the OR circuit 1153 is operated and the signal operates the voltage generation circuit 1149. At this time, the voltage generation circuit 1149 generates a voltage that rotates the arm drive motor 522 counterclockwise (this voltage is a negative voltage), and the operational amplifier 1140 manually applies a negative voltage to the driver circuit 1132, and the driver circuit 1132 rotates the motor 522;
The test lens 4 is held between the first contact surface 605a and the second contact surface 605b of the hands 530 and 531. At this time, motor 5
Since rotation of the lens 22 is prevented by sandwiching the lens, the load current increases. The current is generated by the current detection resistor R1 and is inputted to the operational amplifier 1140, and the motor 522 is driven at a constant current to clamp the lens under test with a constant clamping force. Also, depending on the voltage value generated in the current detection resistor R1, the comparator l l 4
4, /) <Output a pulse to the signal line 1203 to notify the sequencer 1000 that the lens to be tested is held.

Step 1-4: Upon receiving the pulse from the comparator 1144, the sequencer 1000 sends a pulse to the signal line 1204, activates the control circuit 1110 having the same configuration as the control circuit 1112 described above, and activates the lens holding part motor driver 1130. Then, the lens presser up/down motor 111 is rotated normally to lower the lens presser table 106 and press the lens 4 to be tested with the lens presser ring 108. This motor 111 also has a control circuit 11
The comparator 1145 outputs a pulse to the signal line 1206 to notify the sequencer 1000 that the lens 4 to be tested has been pressed.

Step 1-5: When the sequencer 1000 receives pulses from both the signal lines 1203 and 1206, it outputs the pulses to the signal line 1200, activates the OR circuit 1152, rotates the motor 522 in the normal direction, and opens the hands 530 and 531. and remove the clamping of the lens 4 to be tested. Comparator 1 indicates the end of the hand opening operation.
143, and the pulse is notified to the sequencer 1000 via the signal line 1202.

Step 1-6: The sequencer 1000 receives pulses from the comparator 1145 and sends them to the pulse generator 11 via the signal line 1302.
Send a signal to 16. The pulse generator 1116 sends a predetermined number of pulses to the Z-axis motor driver 1137 to rotate the Z-axis motor 514 in the normal direction and rotate the Z-axis table 50.
1 by a predetermined amount. Even if the lens to be tested 4 descends as the Z-axis table descends, the lens holding motor 1
Since the control circuit 1110 of No. 11 acts to drive the lens 4 with a constant current, the motor 111 rotates normally and acts to press the lens 4 with a constant pressing force even while the lens is being lowered.

The test lens 4 is received by the lens holding pin 542 of the lens receiving member 541 while the Z-axis table is descending,
It is held between the lens holding ring 108 and the lens holding ring 108 . When the Z-axis table descends by a predetermined amount, that is, when the pulse generator 1116 finishes generating a predetermined number of pulses, the sequencer 1000 is notified through the signal line 1320 that the Z-axis table has finished descending.

Step 1-7: The lens 4 to be tested is again held between the hands 530 and 531 by the same operation as in step 1-3 above.

Step 1-8 = Next, proceed to alignment of the lens to be tested. Sequencer 10
00 instructs the detection processing unit 1101 to measure the refractive characteristics of the lens to be tested. The detection processing unit 1101 includes a detector 1103
The spherical power S, cylindrical power C1, cylindrical axis angle A, and prism amount pxSpy of the lens to be tested are calculated based on the data from , and the values are input to the hx, hy calculation circuit 1102. An arithmetic circuit 1102 configured with a microcomputer or the like calculates the deviation amounts hx and hy according to equation (2) or equation (5), and outputs the result to a comparator 1104.

If the lens to be tested is a prism-processed lens or requires a prism prescription, the amount of prism (px, py) is input to the calculation circuit 1102 using the keyboard 1121. The amount of prism to the keyboard 1121 is polar coordinate type (p, θ)
If it is done manually, the coordinate converter 1°122 consisting of a microcomputer etc. is used to transform equation (4), and (p
x, py) quantities, and then similarly input to the arithmetic circuit 1102. In this way, the amount of prism (px, py
) and the measured value from the detection processing section, the arithmetic circuit 110
2 is the deviation amount hx according to equation (3) or equation (6),
hy is calculated and the result is output to comparator 1104.

Step 1-9: The comparator 1104 compares the input deviations lhx, hy with a predetermined allowable deviation amount (if it is within this range, the optical center or optical action point of the test lens is aligned with the measurement optical axis of the lens meter). h'x and h'y (the amount that can be considered to be aligned)
Alternatively, if h'y<hy, a Noculus signal is output to the signal line 1303 and inputted to the sequencer 1000. Here, the allowable deviation amounts hx' and hy' are determined by the detection processing unit 1101 based on the measured refraction value of the lens to be tested, for example, 0.2 in terms of prism amount.
If the prism diopter is within the allowable range, the allowable deviation ihx /hy' can be calculated by substituting 0.2 into ρx1py in equation (2) or equation (5), and this can be input manually to the comparator 1104. Use as standard allowable deviation amount.

The deviations 51 hx, 1, and y from the arithmetic circuit 1102 are manually input to selector circuits 1105 and 1106, respectively. Sequencer 10 receiving pulse from signal line 1303
00 causes the selector circuits 1105 and 1106 to select through the signal lines 1304 and 1305, and the deviation amount hxS
hy to the pulse generators 1114 and 1115. The pulse generators 1114 and 1115 convert the manually input deviation amounts hx and hy into the number of pulses, and then send the pulses to the X-axis motor 50 via the driver circuits 1135 and 1136.
4. Manually drive the Y-axis motor 502 to move the lens 4 to be inspected held between the hands 530 and 531 in the X-axis direction or the Y-direction. Pulse generator 1114.111
5, when the output of the pulse is finished, a signal line 13 is sent to that effect.
21.1322 to the sequencer 1000.

Step 1-10+ Upon receiving the pulse output end signal from the pulse generator, the sequencer 1000 again instructs the detection processing unit 1101 to measure the refraction characteristics of the lens 4 to be tested, and the refraction measurement value is calculated by hx and hy calculations. The input is manually input to the circuit 1102, where new deviation amounts hx and by are calculated again, and the results are sent to the comparator 1.
104, and the comparator 1104 performs the same alignment operation as if the newly requested alignment operation was within the range of the deviation amount. This is repeated until hx'-≧hx or hx'-≧,hy is obtained.

Step 1-11 When it is determined that alignment is completed in step 1-10,
Comparator 1104 outputs an alignment completion signal to sequencer 1000 via signal line 1323. When the sequencer 1000 receives this alignment end signal, it instructs the detection processing section 1101 to display the refractive characteristic measurement result of the test lens 4 on the display section DP. Also, if necessary,
Print out the refractive characteristic measurement results on the printer PR.

Step 1-12 Mark subroutine 2 Step 2-1: FIG. 23 is a flowchart showing the subroutine of marking work. First, the sequencer 1000 uses the signal line 1306
The dot driver circuit 1134 is activated via the dot driver circuit 1134. The marking driver circuit 1134 energizes the induction electromagnetic coil 326 of the marking unit 316 for a unit time, lowers the marking needle 317, and applies the ink filled in the ink fountain 323 to the tip of the needle 320.

Step 2-2 = The sequencer 1000 connects the control circuit 1 having the same circuit configuration as the control circuit 1112 described above via the signal line 1208.
Manually send a command pulse to 111. The voltage generation circuit 1151 of the control circuit 1111 applies a positive voltage to the operational amplifier 1142 in response to the pulse from the sequencer 1000, and rotates the marking point moving motor 307 in the forward direction via the driver circuit 1131, thereby moving the marking point. The unit table 306 is lowered and moved to a predetermined position (the position shown by the imaginary line in the 14th figure) where the marking needle 317 at the center of the marking unit 316 coincides with the measurement optical axis of the lens meter. Mark unit 31
The completion of the movement of 6 is notified by inputting the ON signal of the comparator 1147 to the sequencer 1000.

Step 2-3: Upon receiving the signal from the comparator 1147, the sequencer 1000 sends the cylindrical axis angle value θ of the test lens measured by the detection processing unit 1101 to the signal line 1 to the pulse generator 1113.
307. The pulse generator 1113 converts the manually input angle value θ into the number of pulses, and then the driver circuit 113
3, the mark part rotation motor 321 is rotated by the number of pulses. By the rotation of the motor 321, the marking needle 317 of the marking unit 316 is rotated about the measuring optical axis by an angle of 0 minutes. When the pulse generator 1113 finishes outputting pulses for the above number of pulses, it manually outputs a mark unit rotation end signal to the sequencer 1000 via the signal a 1324.

Step 2-4: Upon receiving the mark unit rotation completion signal, the sequencer 1000 again operates the mark driver circuit 1134 via the signal line 1306, and this driver circuit 1134 operates the electromagnetic coil 326 of the mark unit 316 in units. Electricity is applied for a certain period of time, and the marking needle 317 is lowered and brought into contact with the lens 4 to be tested.

As a result, the ink attached to the tip of the marking needle 317 adheres to the lens surface, and marking is completed.

Step 2-5: When the coil 326 is energized by the dot dryer 1134, the sequencer 1000 causes the pulse generator 1113 to generate a reversal pulse corresponding to the cylinder axis angle θ via the signal line 1308.

The marking unit rotation motor 321 receives the reverse rotation pulse from the pulse generator 1113 via the driver circuit 1133, and is reversed by the number of pulses, returning the marking unit 316 to its original reference angular position.

Step 2-6: When the sequencer 1000 receives a signal from the pulse generator 1113 indicating the end of the return of the rotation of the dot unit and the knit rotation, the sequencer 1000 connects the signal line 12.
09 to the voltage generating circuit 1151 manually.

The voltage generating circuit 1151 inputs a negative voltage to the operational amplifier 1142, reverses the marking part moving motor 307, and raises the marking part table 306 to return to the original initial position. When the return is completed, the ON signal of the comparator 1148 is connected to the signal line 12.
11 to the sequencer 1000 manually.

Step 1-13: Upon receiving the signal from the comparator 1148, the sequencer 1000 sends the signal to the OR circuit 1152 via the signal line 1200.
Input the signal to. By the output of the OR circuit 1152, the hand 530.53 is activated in the same manner as in step 1-5 above.
1 releases the clamping of the lens 4 to be tested.

Step i-14: When a signal indicating the end of the opening operation of the hand section is inputted to the sequencer 1000 from the comparator 1143 of the control circuit 1112, the sequencer 1.000 starts the pulse generator 1116.
Activate. This pulse generator 1116 supplies the same number of reverse rotation pulses as those generated in step 1-6 to the Z-axis drive motor 514 via the driver circuit 1137, reverses the motor 514, and rotates the Z-axis table. It is raised to the height of the measurement reference plane 540. As the Z-axis table moves up, the lens to be tested is separated from the lens receiving member and placed on the lens table 532.

Step 1-15: Sequencer 10 receives the signal that the Z-axis table has finished rising
00 activates the voltage generation circuit of the control circuit 1110 via the signal line 1205.

The voltage generating circuit 1150 applies a negative voltage to the operational amplifier 1141, thereby reversing the lens presser up/down motor 111, thereby raising the lens presser table 106 and returning it to its original initial position. As the lens holding table 106 rises, the holding of the test lens 4 by the lens holding ring 108 is also released. The return of the lens holding table 106 is detected by manually inputting an ON signal of the comparator 1146 to the sequencer 1000. The sequencer 1000 displays the completion of measurement on the display section DP.

Step 1-16: The measurer takes down the lens that has been measured and marked on the lens table 532 from the lens table.

In the above explanation, the arm drive motor 522, the lens holding part up/down motor 111, and the mark part moving motor 307 are configured with DC motors, but a torque motor may be used instead. The part movement motor 307 may be a step motor. Furthermore, in order to maintain constant pressure on the test lens, comparators 1143 to 1148 are used to detect constant current drive, but instead of this, it is possible to use a timer or incorporate a limit switch into the mechanical drive unit. can achieve similar objectives. Furthermore, the Z-axis motor can also be configured with a DC motor by using a position detection switch.

2) Case of a lens in a spectacle frame Next, the alignment-marking operation of a lens in a spectacle frame will be explained based on the flowchart shown in FIG.

The measurer switches the measurement mode changeover switch 1402 and sets it to the eyeglass frame side F.

Step 3-1: The sequencer 1000 uses the initial control circuit 1108
Upon receiving this signal, the initial control circuit 108 sends a signal to the OR circuit 1153 via the signal line 1213 shown in FIG. The OR circuit 1153 operates the voltage generating circuit 1149, applies a negative voltage to the operational amplifier 1140, reverses the arm driving motor 522 through the driver circuit 1132, and reduces the distance between the hands 530 and 531 to the minimum distance. The sequencer 1000 detects that the hands 530 and 531 have reached the minimum interval based on the signal from the comparator 1144.

Next, the sequencer 1000 has an initial control circuit 11
08 to read the origin position data of the hand section stored therein from the initial setting register 1107. Based on the data read from this register, the control circuit 1108 drives the X-axis moke 504 and the Y-axis motor 502 in the same manner as in step 1-1 above, and sets the hand section to the original position.

Step 3-2: The measurer holds the eyeglass frame FM in the hand section 530.531.
Multiply by At this time, it is desirable to hang the frame FM so that the lower line of the lens frame FR is in contact with the frame abutting surface. After setting the frame in this way, the start switch 1401 is turned on.

Step 3-3: The sequencer 1000 turns the start switch 1401 O.
Upon receiving the N signal, the signal is input to the OR circuit 1152. The OR circuit 1152 operates the voltage generating circuit 1149 to supply a positive voltage to the current amplifier 1140, and the motor 522
rotate in the forward direction to open the hands 530 and 531. The outer surface 605d of the hand 530, 531 contacts the temple FT of the frame FM, and holds the frame FM on the hand. Note that the frame holding control of this lens is performed by driving with a constant power source as in the case of the unprocessed lens described above.

Step 3-4R: The sequencer 1000 uses comparator 1 to hold the frame.
When the signal from 143 is detected manually, a command signal is manually sent to the frame installation controller 1120 to install the frame F.
A command is given to place M's right eye lens on the measurement optical system 1103. FIG. 21 shows the configuration of this frame installation controller 1120.

First, the sequencer 1000 uses the upper right setting value register 116.
0 via the signal line 1350.

Masonry set point register 1160 outputs a number of pulses to driver circuit 1135 corresponding to the 11alf PD value of a standard eyeglass frame stored therein. The driver circuit 1135 rotates the X-axis motor 504 forward by the number of pulses, moves the arm base 520 to the left, and positions the right eye lens above the lens receiving member. When the upper right set value registration register 1160 finishes outputting the number of pulses, it notifies the 7-controller 1000 of this through the word line L351.

Step: 3-5R: When the sequencer 1000 receives the pulse output end signal of the masonry setting value register 1160, the sequencer 1000 starts the pulse generator l116.
The Z-axis motor 514 is rotated in the normal direction using a predetermined number of pulses from the pulse generator, and the Z-axis table 501 is lowered to the lowest position. As a result, the right eye lens of the eyeglass frame FM is attached to the lens holding pin 5 of the lens receiving member 541.
42.

Step 3-6R: By the same operation as step 1-4 above, the right eye lens is held down by the lens holding ring 108 and held in cooperation with the lens receiving member 541.

Step 3-7R Perform the same operations as the above-mentioned raw lens alignment steps 1-8 to 1-12.

However, for PD measurement, which will be described later, the pulse generator 11
The pulses from 14 are sent to the frame installation controller 1120.
The right eye lens counter 1162 constantly counts. At the end of the marking subroutine, the right eye lens counter 11
To stop counting 62, sequencer 1000 sends a counter end signal to counter 1 via signal line 1356.
162.

Step 3-8R: The sequencer 1000 then instructs the voltage generation circuit 1150 of the control circuit 1110 to supply a negative voltage to the operational amplifier 1141, reverses the lens holder up/down motor 111, and returns the lens holder table to its original initial position. Bring it back. This releases the lens holding ring 108 from holding the right eye lens.

Step 3-9: Next, the sequencer 1000 supplies the Z-axis motor 514 with a predetermined number of pulses from the pulse generator 1116, reverses the Z-axis motor 514, and moves the Z-axis table to the return reference position corresponding to the number of pulses. raise.

This completes the measurement of the alignment, marking points, and refractive characteristics of the right eye lens, and then moves on to measurement of the left eye lens.

Step 3-10L: The sequencer 1000 connects the frame installation controller 11
The number of pulses corresponding to the total PD value of a standard eyeglass frame stored therein is sent to the driver circuit 11 by commanding the 20 female worker setting value register 1161 via the signal line 1352.
35, and the driver circuit 1135 outputs to the X-axis motor 51.
4, move the arm base to the right, and position the left eye lens onto the lens receiving member 541.

Steps 3-11L to 3-15: Perform the same operations as the above-mentioned right eye lens operations Steps 3-5R to 3-9. However, at the same time as the mark point in step 3-13L is completed, the pulse generator 111 to the left eye lens counter 1163 of the frame installation controller 1120
Finish counting from 4.

Step 3-16: The sequencer 1000 connects the signal line 12 to the OR circuit 1153.
01 to reverse the arm drive 522 to close the hand 530, 531, then pulse generator 11
14, command l115 to set x-axis %-1504, Y-axis on -
1502 to return the hand portion to its origin.

Step 3-17: The measurer removes the eyeglass frame from the hand section and finishes the measurement.

Step 4: Sequencer tooo is the frame installation controller 112
The adder 1164 of 0 is commanded and the counter 11 for the right eye lens is
62 and the left eye lens counter 1163 are added together.

PD converter 1165 converts the addition result of adder ll64 into P
It is converted into a D value, the result is displayed on the display section DP, and printed out using the printer PR if necessary.

[Brief explanation of the drawing]

Figures 1 (a) and 3) are schematic diagrams showing the relationship between the lens to be tested and the measurement optical axis of the lens meter, Figures 2 to 4 are schematic diagrams showing the relationship between the prism refractive power and the amount of deviation, Figure 5 is a schematic diagram showing the relationship between the principal meridian of the lens, the refractive power, and the amount of deviation.
FIG. 6 is a schematic diagram showing the configuration of the lens meter according to the present invention, FIG. 7(A) is a plan view showing one embodiment of the alignment device, and FIG. A sectional view, Fig. 8 fA1 is a plan view showing the configuration of the hand section, Fig. 8 (B
) is a sectional view taken along line B-B' of the first prisoner figure, FIG. 8(C) is a left side view of the hand section, FIG. The figure is a plan view showing still another embodiment of the hand part,
10tc+ is a left side view of the embodiment shown in Fig. 10, Fig. 11 is a diagram showing the operation of the first embodiment of the hand section, and Fig. 12 is a view showing the operation of the first embodiment of the hand section. Figure 13 is a diagram showing the action of the hand shown in Figure 9, Figure 14 is a right side view showing the structure of the lens holding part and marking part, Fig. 14fB1 is a plan view thereof, Fig. 14fc1 is a front view thereof, Fig. 15 is a longitudinal sectional view showing the structure of the lens holding pin, Fig. 16 is a front view showing the relationship between the marking unit and the lens holding ring, 1st
6 [Figure B1 is a plan view thereof, Figure 16FC1 is a longitudinal sectional view showing the configuration of the marking needle, Figure 17 is a right side view showing another embodiment of the lens holding part and the marking part, and Figure 17 Figure 19 is a right side view showing still another embodiment of the lens holding part and marking part, Figure 18tB1 is its front view, and Figure 19 is the configuration of the calculation control unit E. A block diagram showing
FIG. 20 is a block diagram showing the configuration of control circuits 1110 to 1112, and FIG. 21 is a frame installation controller 1.
120 is a block diagram showing the configuration of 120, FIG. 22 is a flowchart showing the alignment-marking operation routine when the lens to be inspected is an unprocessed single lens, FIG. 23 is a flowchart showing the marking subroutine, and FIG. 24 is a flowchart showing the marking subroutine. 12 is a flowchart showing an alignment-marking work routine when the lens is a lens in an eyeglass frame. E: Arithmetic control unit, L: Measurement optical axis,
4... Lens to be tested, 108... Lens holding ring (lens holding member),
502... Y-axis drive motor, 503... X-axis base, 504... X-axis drive motor, 505... Y-transport screw, 506...・・・・・・
Y-axis base, 508a...X-axis feed screw, 520...Arm base, 522...Arm drive motor, 523.524
...Pulley, 525 ...Belt, 52
6.527...Arm, 530.531...Hand, 605a, 605b...Inner surface (contact surface). Fig. 14 (C) Fig. 15 Fig. 16 (A) Fig. 16 (B) Fig. 16 (C) Fig. 18 (A) Fig. 18 (B) Mouth pipe 21 Fig. 1114 Go to Figure 22 ◇JJrJ prison, 7, gutter → Figure 23

Claims (4)

[Claims] (1) An alignment device for a test lens, which is held movably in a plane substantially perpendicular to the measurement optical axis of a lens meter by a lens receiving member and a lens holding member cooperating with the lens holding member, wherein the test lens at least two hands having inner surfaces for abutting and sandwiching the edge surface of the lens;
A lens meter comprising: a hand distance changing means for changing the distance between the hands; and a control means for controlling the hand moving means based on the measurement results of the refractive characteristics of the lens to be tested. Test lens automatic alignment device. (2) The hand interval changing means includes a hand moving means for moving at least two hands in opposite directions, and a moving holding means for holding and moving the hand moving means within the plane. A test lens automatic alignment device according to claim (1). (3) The test lens automatic alignment device according to claim 1 or (2), wherein the hand has an outer surface that comes into contact with a temple of an eyeglass frame. (4) The hand interval changing means includes a DC motor for driving a moving means for moving the hand, and a constant torque for driving the DC motor with a constant torque when the hand grips the lens to be examined. A test lens automatic alignment device according to any one of claims (1) to (3), which includes a current drive circuit.