JPH02190246A - Judging device for green lens for lens grinder - Google Patents

Abstract

PURPOSE:To make it possible to secure a lens frame form from a green lens by measuring the thickness of the green lens in accordance with information on the radius vector of the lens frame form, and thereby automatically correcting a processing origin. CONSTITUTION:Information on the radius vector of a lens frame LF measured by a frame form measuring device 1 is stored in a memory 2, and an amount (a) of inner narrowing and an amount (b) of upper narrowing are operated by an operation control device 5 connected with said memory based on the frame PD of a spectacle frame which is inputted in advance (distance between the geometric centers of a right and a left lens frame), the pupilary distance at one side of an eye wearing a spectacle, the distance from the lowermost end of the lens frame to the optical axis of the eye wearing the spectacle and on the like. In addition, the operation control device 5 has co-ordinate transformation performed from information on the radius vector (rhoi, thetai) of the lens frame based on the geometric center OG of the lens frame to information on a radius vector (rhoi', thetai') based on a lens processing origin so as to be stored in the memory 2. Based on said information, the thickness i of a lens is mea sured by a lens thickness measuring device 3, it is judged that the lens is insufficient in diameter when the measured value amounts to zero, and the quantity of new decentering is thereby automatically obtained not to be insufficient in diameter.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention determines whether or not an unprocessed lens can be ground into the shape of the lens frame in order to fit the lens into the lens frame of an eyeglass frame. The present invention relates to a device for determining and determining raw lenses for a beading machine.

(Prior Art) In Japanese Patent Application No. 115079/1982, the present applicant has disclosed that the lens frame of an eyeglass frame is directly shaped or a template having the same shape as the lens frame is used as radius vector information (/i1.ec) [i = 1.
2.3. ...=...N], and proposed a lens grinding machine that processes an unprocessed lens based on the measured radius information.

The device has lens measuring means for measuring the radius of the raw lens. Furthermore, this device compares the lens radius Ri measured by this measuring means with the radius vector radius R of the lens frame, and if there is a portion where R+ < /e, the shape of the lens frame is completely determined from the unprocessed lens. Since this means that it cannot be taken, there is a means to issue a warning to that effect.

In addition to the lens diameter measuring means, the conventional apparatus described above had a lens thickness measuring means for measuring the thickness of the unprocessed lens in correspondence with the radius vector information of the lens frame.

(Problem to be Solved by the Invention) By the way, it is ideal for eye refractive correction that the optical axis of the eye wearing glasses and the optical axis of the lens coincide, but in reality, the optical axis of the eye and the optical axis of the lens do not coincide. There is a gap.

This axis misalignment can be divided into components in the left-right direction (horizontal direction) and up-down direction (vertical direction), and even if some is present, it can be tolerated. Furthermore, the permissible range of axis deviation in the vertical direction is wider than that of the axis deviation of both eyes in the left and right direction.

Therefore, even if a conventional device warns that the unprocessed lens cannot take the desired lens frame shape, it may be possible to obtain the lens frame shape by slightly adjusting the amount of eccentricity between the lens and the lens frame. . For this judgment, it is important to know whether the lens frame is no longer possible in the radial angular direction, but conventional devices have been unable to provide information other than warnings.

Furthermore, as described above, the conventional apparatus required a lens diameter measuring means in addition to the lens thickness measuring means, so the apparatus tended to be complicated and expensive.

Therefore, the first object of the present invention is to determine whether or not a lens corresponding to the lens frame shape can be completely obtained from an unprocessed lens, and if it is not possible to obtain it, the angular information of the radius vector that cannot be obtained is obtained. An object of the present invention is to provide at least a raw lens determination device for a beading machine.

A second object of the present invention is to provide an unprocessed lens determining device for a sling machine that is capable of measuring lens thickness and lens diameter with a simple and inexpensive configuration.

Furthermore, another object of the present invention is to automatically change the amount of eccentricity between the lens and the lens frame to obtain the lens frame shape from the unprocessed lens when the lens frame shape cannot be obtained from the unprocessed lens. An object of the present invention is to provide a raw lens determination device for a beading machine that can perform the following steps.

(Means for Solving the Problems) With this objective in mind, the unprocessed lens determining device for a beading machine of the present invention comprises a frame shape measuring means for obtaining vector radius information of the lens frame shape of an eyeglass frame; a determining means for determining whether the lens frame shape can be obtained from the unprocessed lens; and a display means for displaying at least the angular direction of the impossible radius when the lens frame shape cannot be obtained from the unprocessed lens. and has.

Further, the determining means includes a lens thickness measuring means for measuring the thickness of the unprocessed lens in correspondence with the radius vector information, and when the lens thickness measuring means outputs a thickness signal equal to or less than a predetermined value, , it is determined that the lens frame shape cannot be obtained from the unprocessed lens.

Furthermore, the lens thickness measuring means includes two fillers that come into contact with the front and rear surfaces of the lens, and a measuring means that measures the distance between the fillers.

In addition, another unprocessed lens determination device for a beading machine includes a frame shape measuring means for obtaining radial information of the lens frame shape of an eyeglass frame, and a frame shape measuring means for determining whether the lens frame shape can be obtained from the unprocessed lens. and a correction means for automatically correcting a processing origin so that the lens frame shape can be obtained from the unprocessed lens when the lens frame shape cannot be obtained from the unprocessed lens. Features.

(Example) The present invention will be explained below based on the drawings.

FIG. 1 is a block diagram showing an unprocessed lens determining device according to the present invention.

In this FIG. 1, 1 is the lens frame LP of the eyeglass frame F.
This is a frame shape measuring device for measuring the shape of a frame.

As shown in FIG. 3, this frame shape measuring device 1 determines the shape of the lens frame LP using radius vector information (/i1.8) [i=
1.2.3. . . . N], the lens frame LP is directly measured, or the radius vector information of the shape of the mold formed by copying from the lens frame LF is similarly measured. The detailed structure and operation of this frame shape measuring device W11 are described in Japanese Patent Application No. 6, which was previously filed by the present applicant.
It is disclosed in Japanese Patent Application No. 0-115079 and Japanese Patent Application No. 60-287491.

The radius vector information of the lens frame LF or the template measured by such a frame shape measuring device 1 is stored in the memory 2. An arithmetic and control device 5 is connected to this memory 2 so as to be able to transmit information to each other, and an eccentric position input device 16 is connected to this arithmetic and control device 5If5. This eccentric position input device 6 is
As shown in FIG. 5, the operation panel 8 has operation buttons 61 to 65 arranged. Further, a display 7 made of, for example, a liquid crystal is connected to the arithmetic and control device 5, as shown in FIG. 5 as a display example.

Normally, it is rare that the unprocessed lens L is ground so that the geometric center Og of the lens frame LF coincides with the optical axis Os of the wearing eye E, and in reality, the optical axis Oe and the geometric center Og
Usually, there is a deviation (eccentricity) of a in the horizontal direction and b in the vertical direction. This eccentricity jtalb is the amount of intrusion,
This is called the top-up amount.

The arithmetic control unit M5 inputs the frame PD of the eyeglass frame (distance between the geometric centers of the left and right lens frames) input in advance,
Based on the interpupillary distance on one side of the wearer's eye E, the distance from the lowest end of the lens frame to the optical axis Oe of the wearer's eye E, and the like, the inward shift amount a and the upward shift amount S are calculated.

The inward displacement amount a and the upward displacement amount, that is, the eccentricity jlal
If the lens L is ground so that the optical axis OL of the unprocessed lens L is decentered to the position with b, then when the lens L is inserted into the lens frame LP, the optical axis OL will be the optical axis of the wearing eye E. Matches Oe. Therefore, the arithmetic and control device 5 provides lens frame radius vector information (/i
', ec) is the position of the optical axis of the lens eccentricity value 0 [', that is, the radius vector information based on the lens processing origin (/e ', eL
' ). The new radius vector information (P:', fl&') after this coordinate transformation is stored in the memory 2.

3 is a lens thickness measuring device, and the structure and operation of this lens thickness measuring device 3 are the same as those detailed in the above-mentioned Japanese Patent Application No. 115079/1982. This lens thickness measuring device 3 has a stage 31 that is moved back and forth by the drive of a pulse motor 36, and this stage 31 has a filler 32. 34 are provided. This filler feather, 34
are biased toward each other by a spring holder 38,
The lens L is always held between them. Also, filler 32. 34 is a rotatably supported disc 32a with radius r as shown in FIG. 2A.

34a.

On the other hand, a lens rotation axis 4° 4 of a carriage (not shown) is provided so as to be rotatably driven by a pulse motor 37.
A lens L is held between this lens rotation shaft 4.4.

As a result, the lens L is rotationally driven by the pulse motor 37. Note that the optical axis OL of the lens L is made to coincide with the axis of the rotating shaft 4.4.

The pulse motor 37 has radius information (, I?) from the memory 2.
angular information e and a are inputted from among the angles e and a, and the lens L is rotated by an angle of 8-' from the reference position in accordance with the input angles. On the other hand, the radial length R' is input to the pulse generator 36, and the disk 32a of the filler blade 34 is inputted via the stage 31.
, 34a is moved back and forth and positioned at a position at a radius vector length R' from the optical axis OL, as shown in FIG. 4B.

Then, filler n at this position, movement amount a+ of 34,
b I to encoder 33. The detection signal from the encoder 35 is input to the arithmetic and control unit rI15.

The arithmetic and control unit 5 calculates b+-a+=D++D+-2r=Δ
− is calculated to calculate the lens thickness Δ−.

As shown in FIG. 4A, when the offset amounts a and b' become thicker, the lens frame trajectory (/i'~, eL〃) will be
cannot be completely removed, and the shaded portion UC is located outside the lens L. When the lens thickness Δ~ is measured using the radial information (/i1~.e-~) based on the processing point OL~, as shown in Figure 4B, in the angular range of the radial angle α~α2, Filler 32. as shown. The 34 discs 32a and 34a abut each other, and the lens thickness Δ1 becomes Δ1=0. That is, the arithmetic and control unit 5 detects that the lens thickness Δ1 has become zero, and from the lens L, it is positioned at a desired eccentricity ita'lb' and the radius vector (/e'',
05'') cannot be completely obtained by cutting, and it is determined that the inclined portion uC' is insufficient.

The arithmetic and control device 5 displays the first radial vector angle α1 or the last radial vector angle α2, or both, as shown in FIG. 5, at which the lens thickness Δ1 becomes zero. At this time, the display device 7
The image of FIG. 4B may be displayed.

Furthermore, since the radius vector fα when the lens thickness ΔI becomes zero matches the radius R of the lens L, the radius of the lens L can be determined from the radius vector length Iα. Therefore, lens thickness Δ
- If the measurement is made beyond the radius vector Iα when the mouth becomes zero, display on the display device 7 and notify the operator that the lens diameter must be greater than or equal to fα (=R). . At this time, the eccentricities a' and b' are also displayed on the display bag @1 at the same time. Furthermore, ``TNJ means ``inside'', rU
PJ means "top-up".

In addition, instead of determining that the lens diameter is insufficient only when the lens thickness Δ group becomes zero, it may be determined that the lens diameter is insufficient when Δ1≦τ, taking into account the expected error N in advance,
As shown in FIG. 2C, filler wings, 34 discs 32a,
Since it is expected that 34a may get caught on the lens edge surface LK, the radius vector (1)'+-+, ec' is calculated and the measured lens thickness Δ of 1) is calculated. The amount of change Δ1-Δl-1" P between the lens thickness Δa and the radius vector (R~, θL") is equal to or greater than the predetermined value 7 (V≦
P), filler 32. 34 has come off the lens L, that is, it is determined that there is a long part of the radius vector that is longer than the radius R of the lens L, and it may be determined that the lens diameter is insufficient.

The operator determines the degree of eccentricity in the vertical direction from the required lens diameter βα displayed on the display device 7, the angle information α1 or α2, or the lens diameter insufficient position or range of “α1 to α2” and eccentricity ma'b'. After determining whether the amount should be increased or decreased, turn on the rUPJ button 62 of the eccentric position input device 6. Next, operate the "D" button 64 to decrease the vertical eccentricity, that is, the upper shift Rb'. Change to b~. That is, by moving the geometric center OLI of the lens frame upward by a distance v to Oa-, the entire circumference of the new lens frame radial locus (/i'~, θ,') is as shown in Fig. 6. It can be located within the lens L, and there is no shortage of lens diameter.

The operator sets the lens thickness ΔI [i = 1.2.3. ...11] and check that Δ never becomes zero. The "engineering" button is used to increase the amount of eccentricity, and when the rINJ button is pressed, the horizontal direction, that is, the inwarding amount a' is changed.

Instead of changing the amount of eccentricity based on the operator's judgment, the arithmetic and control device 5 may automatically determine a new amount of eccentricity that will not cause an insufficient lens diameter.

Fig. 7 shows an example of this, and shows the insufficient lens diameter range e.
, nai L/ El j*h (7) m circumscription! +-i+
sinθ+-=Vk[k=1.2. 3. ...
...k, ], find the maximum value V of Vb, and move the center OG of the lens frame by this 7 minutes to ○G'.

FIG. 8 shows another example, in which the difference between the lens diameter short range angle ej~e Ih, the radius vector long sword~, o, , , and the lens radius R/'' Ink R= Q * [
k = 1.2.3.・・・・・・k] is maximum 11
Knowing the radius vector (Il, θ,) that becomes maw, 9mmmm1if
nθ@ = Vl 11 aamcO8e @ = H
Calculate horizontal direction (inner alignment) H9 vertical direction (upper alignment)
Each eccentricity amount is corrected by V.

Then, the eccentricity I after correction based on FIG. 7 or FIG.
is displayed on the display bag W17, and the operator selects O with the corrected eccentricity amount.
If it is determined to be K, the r3J button is turned on, and the arithmetic and control unit i5 converts the coordinates into radial information based on this new machining origin, and grinds the lens based on it.

Furthermore, by inputting the lens diameter in advance using an input device (not shown), an amount of eccentricity that does not cause insufficient lens diameter can be obtained from the beginning.

(Effects of the Invention) According to the present invention, since the position where the lens diameter is insufficient can be indicated by an angle display, the operator can judge how much the eccentricity of the lens should be corrected to prevent the lens diameter from becoming insufficient. can be of great help.

Furthermore, it would be even more convenient if the arithmetic and control unit automatically calculated it.

Further, according to the present invention, since the lens thickness measuring device is also used as a determining device for determining whether the lens diameter is insufficient, there is no need for a dedicated member for determining the lens diameter, unlike the conventional method.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a determination device according to the present invention. FIGS. 2A to 2C are six diagrams showing the principle of measuring lens thickness using a filler. FIG. 3 is an explanatory diagram regarding radius vector information and eccentricity of the lens frame. FIG. 4A is an explanatory diagram showing the relationship between the lens, the lens frame locus, and the amount of eccentricity of the lens. FIG. 4B is a schematic diagram showing the operating principle of the present invention. FIG. 5 is an explanatory diagram showing an example of an input device and a display device. FIG. 6 is an explanatory diagram showing that the insufficient lens diameter portion is eliminated by eccentricity 1 correction. FIG. 7 is an explanatory diagram showing an example of the calculation principle for calculating eccentricity correction. FIG. 8 is an explanatory diagram showing another example of the calculation principle for calculating eccentricity correction. 1... Frame shape measuring device 3... Lens thickness measuring device 5... Arithmetic control device 6... Eccentric position manual device 7... Display device Fig. 1 Fig. 2A Fig. 2B Fig. 4B

Claims (4)

[Claims] (1) Frame shape measuring means for obtaining radius vector information of the lens frame shape of an eyeglass frame; determining means for determining whether the lens frame shape can be obtained from the unprocessed lens; and the lens frame from the unprocessed lens. 1. A raw lens determining device for a slug machine, comprising display means for displaying at least the angular direction of the radius vector that cannot be taken when the shape cannot be taken. (2) The determining means includes a lens thickness measuring means for measuring the thickness of the unprocessed lens in correspondence with the radius vector information, and the lens thickness measuring means outputs a thickness signal that is equal to or less than a predetermined value. 2. The unprocessed lens determining device for a polishing machine according to claim 1, wherein the unprocessed lens determining device is configured to determine that the lens frame shape cannot be obtained from the unprocessed lens. (3) The lens thickness measuring means includes two fillers that come into contact with the front and rear surfaces of the lens, and a measuring means that measures the distance between the fillers.
A raw lens determination device for the Tamazuri machine described in . (4) Frame shape measuring means for obtaining radius vector information of the lens frame shape of an eyeglass frame; determining means for determining whether the lens frame shape can be obtained from the unprocessed lens; and the lens frame from the unprocessed lens. An unprocessed lens determining device for a beading machine, characterized by having a correction means for automatically correcting a processing origin so that the lens frame shape can be obtained from the unprocessed lens when the shape cannot be obtained. .