JPH0360960A - Eye glass lens machining device - Google Patents

Abstract

PURPOSE:To perform automatic adsorption of a lens fixing tool by a method wherein a lens fixing tool adsorbing means to adsorb the lens fixing tool in a given direction to an eye glass lens placed in the measuring position of an optical characteristic measuring means is provided in a position on the measuring optical axis of the optical characteristic measuring means. CONSTITUTION:A lens fixing tool adsorbing means 3 adsorbs a lens fixing tool 31 in a given direction to an eye glass lens 20, placed in the measuring position of an optical characteristic measuring means 2, in a position on the measuring optical axis of the optical characteristic measuring means 2. by measuring the optical characteristics of the eye glass lens 20 by means of the optical characteristic measuring means 2, a position relation between the optical axis of the eye glass lens 20 and the mounting position of the lens fixing tool 31 can be detected. An approach amount is determined from shape data of an eye glass frame, lens data, and a recipe data, and on a basis of the adsorbing position of the fixing tool 31, correction is made on machining data by means of a computing means to produce a lens in a desired shape.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an eyeglass lens processing apparatus for processing eyeglass lenses.

[Conventional technology]

Conventionally, this type of apparatus has been equipped with a microcomputer and has been automated and intelligent to a certain extent, but its scope has been limited to automation of frame shape measurement and automation of bending sequence. In other words, frame shape data is digitized and stored in memory, and data on the eyeglass wearer, such as the amount of "shifting", is added to that data to create correction data, and this correction data is used as processing data for the lens periphery processing machine. The system automatically performed a sequence of attaching a bevel to the periphery of the lens as instructed by the operator.

[Problem to be solved by the invention]

The above-mentioned conventional technology completely lacks consideration for "marking points" and "adsorption" for adsorbing the processing fixing member to a certain position on the eyeglass lens. As can be seen from the fact that these operations are said to be relatively difficult among machining processes, they are time-consuming and prone to errors. That is,
This work requires at least the following work even in systems that are currently available and advanced. In other words, find the center of the lens with a lens meter, and once you find the center of the lens, mark the direction of the astigmatism axis along with the center of the lens, set the marked lens on the suction device, then aim it again and suction it. This is the operation of fixing the member on the center of the lens. This series of operations can only be performed by an operator who has sufficient knowledge of how to operate a lens meter and the spectacle lenses themselves, and is prone to errors, such as marking points in the angular direction of astigmatism. be. .

The present invention aims to automate these operations, shorten the operation time, and realize failure-free machining operations.

[Means to solve problems]

The above tl! In order to solve the problem, the present invention provides a shape data output means for outputting frame shape data of an eyeglass frame, an optical property measurement means for measuring the optical properties of an eyeglass lens and outputting lens data, and a method for measuring the optical properties. a lens fixture adsorption means for adsorbing a lens fixture in a predetermined direction to a spectacle lens placed at the measurement position of the optical property measuring means at a predetermined position with respect to the measurement optical axis of the means; and prescription data. the frame shape data outputted by the shape data outputting means, the lens data outputted by the optical characteristic outputting means, the prescription data inputted to the prescription data inputting means, and the position of the adsorption member. and a calculation means for calculating and outputting processing data based on the suction position of the lens fixture based on the direction and direction; and a peripheral processing means for processing the lens attracted by the lens fixture based on the processing data. An eyeglass lens processing apparatus, characterized in that the lens fixture suction means is mechanically positioned with the optical property measuring means, and the lens fixture is held in place during the optical property measurement. The eyeglass lens processing apparatus is characterized in that the lens fixture is evacuated from the measurement optical path, and when adsorbed, the lens fixture is introduced into the measurement optical path, and the lens fixture is attracted onto the spectacle lens through which the measurement optical axis passes. Furthermore, the calculation means calculates a vector of the amount of eccentricity of the lens suction member from the center of the lens using the direction of the fixture as a coordinate reference, and calculates a vector of deviation representing the amount of eccentricity of the center of the lens with respect to the center of the frame. After determining the direction of the fixture using the coordinate reference, the eccentricity vector and the shifting vector are used as bases to determine the eccentricity of the lens fixture with respect to the center of the frame in vector form, and The shape data was corrected using the direction of the lens fixture as a reference, and the data on the amount of eccentricity obtained vectorwise of the lens fixture with respect to the center of the frame and the frame shape data were corrected using the direction of the lens fixture as a reference. The eyeglass lens processing apparatus is characterized in that the processing data is the processing data.

[Effect]

In the present invention, the lens fixture suction means moves the lens fixture in a predetermined direction at a predetermined position with respect to the measurement optical axis of the optical property measurement means on the spectacle lens placed at the measurement position of the optical property measurement means. By measuring the optical properties of the eyeglass lens with an optical property measuring means,
It is possible to know the positional relationship between the measured optical axis of the eyeglass lens and the mounting position of the lens fixture. Then, from the shape data, lens data, and prescription data of the eyeglass frame, the amount of deviation (the amount of deviation between the lens optical axis and the frame center after the processed lens is inserted into the frame) is calculated, and the optical axis of the eyeglass lens and the lens fixing device described above are calculated. From the relationship between the center of the eyeglass frame and the position of the lens fixture, which is determined using the relationship between the center of the eyeglass frame and the position of the lens fixture, and the direction of the lens fixture. The calculating means corrects the processing data based on the suction position of the lens fixing tool so that a lens having a desired shape can be obtained even if the lens is processed.

Therefore, since the peripheral edge processing means processes the lens to which the above-mentioned fixture is attracted based on this processing data, it is possible to process a lens suitable for the eyeglass frame regardless of the suction position of the lens fixture.

〔Example〕

The present invention will be described below based on embodiments shown in the drawings.

FIG. 1 is a block diagram of an embodiment of the present invention.

The frame data storage device 1 stores shape data of eyeglass frames as frame shape data, and outputs the stored shape data. The configuration of this frame data storage device l may be such that a memory in which design data of eyeglass frames is stored in advance may be used, or the shape of the eyeglass frame selected by the patient may be measured with a frame shape measuring device, and this measured value may be used. It may also be stored as frame shape data. For example, the frame shape data may be expressed in polar coordinates with the origin at the center of the frame (for example, the center of a boxing system).
F(θ)).

Data from the frame data storage W1 is called up by a command from the computer 5 and input into the computer 5.

The lens meter 2 uses X, which serves as a reference for the spherical power, astigmatic power, astigmatic axial degree, and astigmatic axial degree, of the test lens from the position of the light spot of the light beam that has passed through the test lens inserted into the measurement optical system. An automatic lens meter can be used that determines prism components resolved into the direction and the Y direction orthogonal to this. An example of such an automatic lens meter is the Japanese Patent Application Laid-open No. 6
It is disclosed in Japanese Patent No. 3-131042. Spherical power (S) and astigmatic power (C) measured by lens meter 2
, astigmatic axis θ and prism components (P, , P7) are lens data, and this lens data is stored in the computer 5.
The computer 5 is called by a command from the computer 5 and inputted into the computer 5.

Is the lens meter 2 equipped with a lens fixing device suction device? ! f3 is mechanically positioned and fixed.

The lens fixture suction device 3 is for suctioning and fixing a lens fixture for fixing the unprocessed spectacle lens to the lens peripheral edge processing machine 6 to the unprocessed spectacle lens. With the center of the lens fixture aligned with the measurement optical axis of the lens meter 2 and with the lens fixture oriented in a predetermined direction with respect to the lens meter, the lens fixture is fixed to the unprocessed eyeglass lens by suction. The lens fixture suction device 3 is positioned with respect to the lens make 2 as shown in FIG.

The suction operation of the lens fixture suction device 3 is controlled by instructions from the computer 5.

The keyboard 4 has a function as a prescription data input means for inputting patient prescription data, and also functions as an input device for various data and commands.

The computer 5 receives various data from the keyboard 4,
At the same time as inputting the command, the frame shape data of the frame data storage device 1 and the lens data of the lens meter 2 are inputted, and the frame shape data is obtained from the frame shape data, lens data, prescription data, and the position and direction of the lens fixture. The machining data is corrected based on the suction position of the lens fixture, and the machining data is sent to the lens peripheral edge machining machine 6 which can be numerically controlled.

The lens periphery processing machine 6 processes the unprocessed spectacle lens, on which the lens fixture has been previously sucked by the lens fixture suction device 3, based on the processing data output from the computer 5.

For such lens peripheral edge processing a6, a lens peripheral edge processing machine such as that described in, for example, Japanese Patent Application Laid-Open No. 177256/1984 can be used. The embodiment shown in the drawings of the above-mentioned publication performs copy processing, but as described in the above-mentioned publication, the amount of processing in the radial direction of the eyeglass lens to be processed is numerically controlled using the 1st type 9. Just do it.

Next, the positional relationship between the unprocessed spectacle lens and the lens fixture will be explained.

FIGS. 2(a) and 2(b) are schematic diagrams showing the lens meter 2 and the lens-fixed military uniform W3, with FIG. 2(a) being a side view and FIG. 2(b) being A-A' It is an arrow sectional view.

A lens fixture suction device 3 is fixed to the lens meter 2 .

Lens fixture suction device 30 The rotating arm 30 is provided with one end rotatable within a range of 90 degrees with respect to the lens meter 2, and a lens fixture 31 is attached to the other end in a predetermined direction. . In order to indicate a predetermined direction, the lens fixture 31 is provided with a groove 3 as shown in FIG. 2(b), for example.
2 is formed. This groove 32 serves as a reference for the direction of the astigmatism axis of the unprocessed eyeglass lens 20 that is suction-fixed by the lens fixture 31, and the direction defined by this groove 32 is referred to as the reference direction. The mounting position of the fixture 31 means that the center of the lens fixture 31 is aligned with the measurement light of the lens meter 2 when the rotary arm 30 rotates 90 degrees from the retracted position in FIG. It is determined in advance so that it coincides with the axis i and faces in a predetermined direction with respect to the lens meter 2. The rotating arm 30 rotates in the direction of 90 degrees as shown in FIG. 2(b) (arrow B), and the lens fixture 3
1 is lowered along the optical axis 2 (arrow C in FIG. 1), and the lens fixture 31 is attracted to the unlowered spectacle lens 20.

Lens meter 2 is unprocessed eyeglass lens 20t-i3! The mounting table 21 has four openings 22a, 22b, 22c, and 22d arranged evenly on a circumference centered on the measurement optical axis l, through which the measurement light beam passes.

The raw eyeglass lens 20 has four apertures 22a, 22b,
It is placed on the mounting table 21 so as to cover 22c and 22d. At this time, the position of the raw spectacle lens 20 does not require precise positioning. That is, the optical axis lt of the unprocessed eyeglass lens 20 does not need to coincide with the measurement optical axis, and its direction may be arbitrary.

In this way, the unprocessed eyeglass lens 20 placed on the IT table 21 is measured by the lens meter 2.

In this way, when the lens data of the raw eyeglass lens 20 is measured by the lens make 2, the computer 5 stores the frame shape data from the frame data storage device 1, the lens data from the lens meter 2, and the keyboard. In addition to inputting the prescription data from step 4, the frame shape data is corrected to processing data based on the suction position of the lens fixing tool based on the position and direction (reference direction) of the lens fixing tool, and this processed data is It is sent to the peripheral edge processing machine 6.

Next, the operation of the computer 6 will be described in detail as shown in FIG. Explain the principle.

When the lens fixture 31 is attracted to the unprocessed spectacle lens 20, the eccentricity of the attraction position of the fixture 31 from the center of the lens is XL, where the eccentricity vector is X(XL, yL).
)'L can be expressed as follows.

However, XL%)'L: The center position coordinates of the lens fixture 31 when the optical axis of the unprocessed eyeglass lens 20 is the origin, the direction of the lens cylinder axis is the y-axis, and the direction orthogonal to the y-axis is the y-axis. Values, Px, Pv: X and Y measured by lens meter 2
The amount of prism in the direction, S, C, θ; the spherical power, astigmatic power, and astigmatic axial power measured by the lens meter 2.

Note that FIG. 4 shows the above-mentioned x-y coordinate system and X-Y coordinate system. As mentioned above, the x-y coordinate system passes through the optical axis of the unprocessed eyeglass lens 20, with the direction of the lens cylinder axis as the y-axis, and the direction orthogonal thereto as the y-axis. The coordinate system passes through the center of the lens fixture 31, that is, the measurement optical axis of the lens meter 2, and the lens fixture 31
The reference direction of is defined as the y-axis, and the direction orthogonal to this reference direction is defined as the Y-axis.

And the above equations (1) and (2) are S (S+C)≠
This holds true when S (S+C) - 0, and does not hold when S (S+C)=0, but the case where S (S+C)=0 will be discussed later.

Now, with normal eyeglass lenses, the optical axis of the processed lens is placed in the frame so that it matches the optical axis of the patient's eye during distance vision when wearing the eyeglass frame, so the optical axis of the lens and the eyeglass frame are It does not match the center of the frame. This shift is usually referred to as "adjustment."

The "shift" that is currently being input as prescription data is the vector χ. (η, ζ), this "shifting" vector passes through the center of the frame, with the horizontal direction of the frame being the X0 axis and the vertical direction being the Y0 axis. It is expressed in an x, -yo coordinate system. Note that this coordinate system is also illustrated in FIG.

Therefore, in order to express this "shifting" vector in the xy coordinate system, rotational coordinate transformation is necessary.

Therefore, if the rotation mapping is city, then the new coordinate system (
x-y coordinate system) is ×′. = Monkey x.・・・・・・・・・・・・・・・・・・
・Represented by (3). and its components (η′, ζ′)
is 77'=77CO3(φ-θ)+ζ5in(φ-θ
) ・(4)ζ′−ζ5in(φ−θ)+ζcos (
φ−θ) ・(5).

As a result, the vector from the frame center to the suction position (the center of the lens fixture 31) is as follows, where the vector of eccentricity from the lens center to the suction position is denoted as Λ = XL + X'.・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・ (6) The components (X, Y) are X −x t+η′ ・・・・・・・・・・・・・・・・・・
・・・・・・・・・・・・・・・ (7) Y=yL+ζ
' ・・・・・・・・・・・・・・・・・・・・・
・・・・・・・・・(8)

The above explanation has been about the procedure for determining the relationship between the suction position and the frame center, but it is also necessary to convert the frame data determined in advance as necessary.

In other words, normal frame data is created by starting the data at the position where the horizontal axis (X0 axis in Figure 3) that passes through the mechanical center of the frame intersects with the frame, and rotating it counterclockwise at a predetermined angle. This is the distance between the center and the frame.

For example, if the predetermined angle is 1 degree, the frame data string f
is (f (0), f (1) from 0 degrees to 359 degrees
,...f(359)).

Therefore, the data f(φ-
If θ, ) is used as initial data, the frame data will be converted to data based on the reference direction provided by the lens fixture 31. If this data string is F, then F=(f(φ-θ), f(φ-θ+1)...f
(359), f(0)...f(φ-θ-1))
・・・・・・・・・・・・(9)

Next, considering the case of S (S+C)-0, in this case there are two cases: S=0 and S+C=O.

Therefore, if S=O, then xL=Px/C・・・・・・・・・・・・0ωY
t=Py/C......00.

Also, in the case of S+C=O, suppose x, =P, /C......02)
)'L=PY/C・・・・・・・・・・・・・Define as 0.

Note that in the case of 5=C-O, the lens has no refractive power, so there is no "shifting" or the like.

The values obtained using equations (10) to (13) in this way are used in place of equations (1) and (2) above, and S
The same calculation as in the case of (S+C)≠O may be performed.

Now that the explanation of the principle has been completed, let's move on to the computer 5
Explain the operation.

In the flowchart of FIG. 3, the computer 5:
Whether or not the unprocessed eyeglass lens 20 is placed on the mounting table 21 of the lens meter 2 (whether the lens is set or not)
(step 300).

This determination can be made by the lens meter 2 automatically detecting that the lens has been inserted into the measurement optical path (for example, by a change in the measured value), and the computer 5 inputting the detection signal, or by inputting the detection signal from the keyboard. 4th grade unprocessed eyeglass lens 2
Alternatively, the computer 5 may enter a key input signal indicating that 0 has been placed, and the computer 5 may input this key input signal.

When the lens is set, the computer 5 causes the lens meter 2 to measure the lens, and the lens data (S, C1θ,
P,,P,) is input (step 301).

Next, the computer 5 instructs the lens fixture suction device 3 to suction the lens fixture 31 onto the unprocessed spectacle lens (step 302).

When the suction of the lens fixing device is completed, the computer 5 prompts to enter prescription data from the keyboard 4 (step 303).
Step 304
, if they are equal, it is determined to be correct and the process proceeds to step 305.
If they are not equal, it is determined that it is incorrect, a warning is issued in step 306, and a lens that matches the prescription is reset (step 307).

In step 305, it is determined whether S (S+C) is zero, and if it is zero, it is determined in steps 308 and 309 whether S is zero (step 308) and whether S0C is zero (step 309). . If S is not zero, then in step 310, equation (10).

By equation (Eng. 1), XL −(Xt , )'t ) −(
Px/S, pv/S), and S is zero, but S+C
If is not zero, in step 311, XL = (xt, yL) = by equations (12) and (13)
(Px /S+C, PV/S+C).

On the other hand, if S (S0C) is not zero in step 305, eccentricity IXL is calculated in step 312 using equations (1) and (2).

Then, when steps 310, 311, and 312 are completed, in step 313, the vector Xt of the amount of eccentricity from the lens center to the suction position is determined based on equation (6), taking into account "shifting".

Next, the computer 5 inputs frame data from the frame data storage device 1 in step 314, and converts the frame data into a data string expressed by formula (9) with converted reference positions (step 314).

On the other hand, when S0C is zero in step 309, that is,
When SO and S0C=O, the frame data is used as processed data as it is. (Step 315).

Step 302. When the unprocessed spectacle lens 20 with the fixing tool suctioned in step 31 is manually or automatically attached to the lens edge processing machine 6, the computer 5 detects this automatically or by an instruction from the keyboard.
6), the processed data obtained in steps 313 and 314 or the processed data obtained in step 315 is processed in step 3.
At step 17, the lens is sent to the lens peripheral edge processing machine 6.

Then, in response to a processing completion signal from the lens peripheral processing machine 6, the series of controls is terminated (step 318).

〔Effect of the invention〕

As described above, according to the present invention, it is possible to completely eliminate lens centering, axis alignment, mark points, suction or gathering of lens fixing tools along mark points, and prism operations that are highly error-prone. Can be automated. Just by setting the lens in the appropriate position (no need for alignment at all), the lens fixing tool is automatically adsorbed, and all you have to do is enter the prescription and chuck it into the processing machine either manually or automatically. . Furthermore, according to the embodiment of the present invention, even if a lens of the wrong power is set, it is possible to check and notify the user of the mistake before starting processing.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2(a),
2(b) is a schematic diagram showing the lens meter 2 and lens fixture suction device 3 of FIG. 1, FIG. 2(a) is a side view, and FIG. ) A-A' arrow sectional view of
FIG. 3 is a flowchart of the computer 5 of FIG. 1, and FIG. 4 is a diagram showing the relationship between a plurality of coordinate systems according to the present invention. [Explanation of symbols of main parts] ■... Frame data storage device, 2... Lens meter, 3... Lens fixture adsorption device, 4... Keyboard, 5... Computer, 6...
・Lens peripheral processing machine.

Claims (3)

[Claims] (1) A shape data output means for outputting frame shape data of a spectacle frame; an optical property measuring means for measuring optical properties of a spectacle lens and outputting lens data; and a measuring optical axis of the optical property measuring means. a lens fixing device adsorption device for adsorbing a lens fixing device in a predetermined direction to a spectacle lens placed at a measurement position of the optical property measuring device at a predetermined position; and a prescription data input device for inputting prescription data. , from the frame shape data outputted by the shape data output means, the lens data outputted by the optical characteristic output means, the prescription data inputted to the prescription data input means, and the position and direction of the lens fixture, the lens It is characterized by having a calculating means for calculating and outputting processing data based on the suction position of the fixing tool, and a peripheral processing means for processing the lens attracted by the lens fixing tool based on the processing data. Eyeglass lens processing equipment. (2) The lens fixture suction means is mechanically positioned with the optical property measuring means, and during the optical property measurement, the lens fixture is retracted from the measurement optical path, and during suction, the lens fixture is moved from the measurement optical path. 2. The eyeglass lens processing apparatus according to claim 1, wherein the lens fixture is introduced into a measurement optical path and adsorbed onto the eyeglass lens through which the measurement optical axis passes. (3) The calculation means calculates a vector of the amount of eccentricity of the lens suction member from the center of the lens using the direction of the fixture as a coordinate reference, and calculates a vector of deviation representing the amount of eccentricity of the lens center with respect to the center of the frame. After determining the direction of the fixture as a coordinate reference, the vector of the eccentricity amount and the shift vector are combined to determine the eccentricity of the lens fixture with respect to the center of the frame in vector form;
Furthermore, the frame shape data is corrected using the direction of the lens fixture as a reference, and the data of the eccentricity obtained vectorwise of the lens fixture with respect to the center of the frame and the frame shape data are corrected with the direction of the lens fixture as a reference. The eyeglass lens processing apparatus according to claim 1, wherein the processing data is data corrected as .