JP2851032B2 - Judgment device for lens to be processed - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for determining a lens to be processed, which compares optical characteristics of the lens to be processed with prescription data.

[0002]

2. Description of the Related Art Conventionally, in general, when making glasses,
First, the eye refractive index of the customer's eye and the astigmatic axis are measured, and prescription data data for the eyeglass lens is created based on the measurement, and the customer is allowed to select the lens frame and lens type of the eyeglasses, This information is sent to a processing plant or the like. In this processing site, the lens to be processed is selected based on the above information, and the direction of the astigmatic axis and the optical center of the lens to be processed are selected.
(Optical axis) and the like are measured with a lens meter, and the lens to be processed is marked on the lens to be processed based on the above measurement so that the astigmatic axis is directed to a target direction when the lens to be processed is processed and mounted on the lens frame of the glasses. Do points (marking).

[0003] Next, an eyeglass frame (template) is superimposed on the lens to be processed, and the axes of the optical axis and the astigmatic axis of the two are aligned with each other. From outside, that is, whether or not processing is possible, that is, whether or not the substrate is cut. The workability confirmation work includes a direct-view type for directly viewing and a projection type by projection.

If the peripheral edge of the lens shape goes out of the peripheral edge of the lens to be processed in this checking operation, it is impossible to perform the processing, so it is necessary to replace the lens with a larger diameter lens. On the other hand, when it does not come out, since it is possible to process, a suction jig, which is a processing jig, is attached to the center of the lens to be processed using the suction device so as to coincide with the axis of the optical axis,
This suction disk is attached to a lens holding shaft of a balling machine.

[0005]

In order to determine whether or not the selected lens to be processed matches that of the prescription data, the lens to be processed is measured with a lens meter, and the measured result is compared with the prescription data. Perform by comparing with the data.
That is, the numerical value of the measurement result and the numerical value of the prescription data are confirmed one by one to determine whether they match. For this reason, there has been a problem that the checking operation is very troublesome, and the judgment is erroneously made by mistaking the numerical values.

Accordingly, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide an apparatus for determining a lens to be processed which does not need to compare numerical values and which can determine a lens to be processed quickly and accurately. Is to do.

[0007]

In order to achieve the above object, the present invention provides an inputting means for inputting prescription data, a measuring means for measuring optical characteristics of a lens to be processed, and a method for measuring the prescription data and optical characteristics. And comparing means for comparing.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings.

[First Embodiment] In FIG. 1 and FIG.
Is a lens meter according to the present invention. In FIG. 3, reference numeral 2 denotes an IC card data recording / reproducing apparatus composed of the IC card reader 2a and IC reader / writer 2b of FIG. 2, 3 denotes an objective optometer, 4 denotes a subjective optometer, and 5 denotes a customer. A computer for management, 6 is a balling machine for processing the shape of the lens to be processed, and 7 is a frame reader that measures the shape of the lens frame of the eyeglass frame, the distance between the lens frames, the frame PD, and the like. The lens meter 1, the data recording / reproducing device 2, the objective optometer 3, the subjective optometer 4, the computer 5 for customer management, the ball-slider 6, etc. can mutually transmit information.

As shown in FIG. 1, a keyboard 9 is provided at the lower part of the front surface of the main body 8 of the lens meter 1 shown in FIG. The keyboard 9 has a number of operation switches 10 used for measuring the optical characteristics of the lens, a number of switches 11 for setting a data input mode, and a numeric keypad 12 for inputting numerical values as data. At the center of the front surface of the main body 8, there is provided a lens receiving base 13 in which a sensor for measuring the lens shape is incorporated as a measuring unit 13a (measuring means) in FIG.

FIGS. 9 and 10 show the lens holder 13.
Can be attached. Mortar-shaped recess a in the center of adapter A
Is formed, and a small hole b is formed in the center of the concave portion a. When the adapter A is mounted on the lens receiving base 13 and used, the center of the concave portion a, that is, the small hole b
Is made to coincide with the center of the measuring unit 13a. In this state, the lens to be processed is placed in the concave portion a, and the optical characteristics of the center of the outer shape of the lens to be processed are measured. It is configured. According to this, it is possible to cope with a lens to be processed whose optical center deviates from its outer shape center.

A mounting projection 14 integral with the main body 8 is provided above the lens receiving base 13. A lens holder (not shown) and a marking means (marking means) (not shown) are mounted on the mounting projection 14. A monitor TV 15 (display means) is provided on the upper part of the main body 8.

At the lower part of the mounting projection 14, a suction plate mounting lever 16 as a processing jig mounting means is provided with an axis A-.
It is mounted so as to be able to rotate horizontally around A 'and to be driven vertically. The turning operation and the vertical driving operation of the suction plate mounting lever 16 are performed manually, but may be performed automatically. A suction cup holder 17 is provided at an intermediate portion of the suction cup mounting lever 16, and a mounting shaft portion 18a of a rubber suction cup 18 as a processing jig is detachably held on the suction cup holder 17. It has become.

A control circuit 19 as shown in FIG. 2 is provided inside the main body 8. The control circuit 19 includes an arithmetic control unit 20, a data input unit 21, and a data storage memory 22.

The data input section 21 includes a lens diameter input section 21a (means for inputting information on the outer periphery of the lens to be processed), a frame PD
It comprises an input section 21b, a pupil PD input section 21c, a lens data input section 21d (lens data input means), an eccentricity input section 21e, and the like. Moreover, this data input unit 21
The operation is selected by the mode setting switch 11 shown in FIG. 1, and the lens diameter, the frame PD, the pupil PD, the lens data, the eccentricity (the amount of movement for exerting the prism action), and the like are calculated and controlled by the calculation control unit 20 (calculation means). To enter. The frame PD input unit 21
b and the pupil PD input unit 21C constitute an eye point input unit. The frame PD indicates the distance d1 between the lens frame centers, that is, the distance d1 between the geometric centers in both lens frames (frame frames) F of the eyeglass frame MF, as shown in FIG. The distance d2 between the centers of the pupils of both eyes of the wearer is shown in FIG.

Here, the lens diameter input section 21a inputs the lens diameter with the ten keys 12 of the keyboard 9.
If the measurement unit 13a is configured to automatically measure the lens L when the lens L to be processed is placed on the lens receiving base 13, it is possible to input data of a deformed lens other than the circular lens.

The pupil PD input unit 21c and the lens data input unit 21d are configured to directly input data from the objective optometer 3 or the subjective optometer 4 online or via an IC card or the like. However, when data is not directly input from the objective optometer 3 or the subjective optometer 4 to the pupil PD input unit 21c or the lens data input unit 21d, the measurement by the objective optometer 3 or the subjective optometer 4 is performed. The user inputs necessary data by operating the mode setting switch 11 and the ten keys 12 of the keyboard 9 while looking at the prescription data and the like obtained as a result of the above.

The arithmetic control unit 20 receives frame shape data and lens data from the IC card reader 2a of the IC card data recording / reproducing device 2 and receives data from a measurement unit (sensor) 13a provided on the lens holder 13. The measurement signal is input. The IC card reader 2a as the frame shape information input means of the eyeglass frame includes a shape (frame shape) of the lens frame of the eyeglass frame measured by the frame reader 7, a distance between the lens frames, or a frame PD (a distance between the centers of the lens frames). Data such as distance) and lens data such as the optimal trial lens used at the time of optometry by the objective optometer 3 and the subjective optometer 4. The frame PD
Is input to the arithmetic and control unit 20 via the IC card reader 2a if measurement is possible with the frame reader 7, but is input from the frame PD input unit 21b with the numeric keypad 9 if measurement is not possible with the frame reader 7. I do.

The lens data input to the arithmetic and control unit 20 by the card reader 2a or online includes the refractive power, cylindrical power, axial angle, eccentricity, pupil PD (interpupillary distance) of the lens prescribed by optometry. ) Etc. are included. The IC card reader 2a also has a function as optometry data input means for inputting optometry data (prescription data data). When the IC card reader 2a is not used, the arithmetic and control unit 20 functions as optometry data input means for inputting optometry data.

On the other hand, the processing data including the shape data of the frame is input from the arithmetic control unit 20 to the IC reader / writer 2b of the IC card data recording / reproducing apparatus 2, and the data, the shape, and the lens A frame or the like is input to the monitor TV 15 and displayed. The IC reader / writer 2b inputs processing data necessary for grinding control of the peripheral portion of the lens to be processed to the ball mill 6. The operation control unit 2
0 controls the drive of the buzzer 23.

The arithmetic and control unit 20 includes a frame PD and a pupil.
Position of eye point P provided in frame F from PD
(See FIG. 6). Then, the eye point P is made to coincide with the optical center O of the lens L to be processed, and it is calculated whether or not the selected eyeglasses frame MF (FIG. 3) is not cut off. At this time, a display in which the frame frame F and the lens L to be processed are superimposed on the monitor TV 15 is performed, and it is possible to visually observe the out-of-plane state of the lens.
Further, the eye point P of the prescription data shown in FIG.
8, the optical center O of the lens L to be processed is matched as shown in FIG. 8, and the astigmatic axis X of the prescription data shown in FIG. 6 and the cylindrical axis X 'of the lens L to be processed shown in FIG. As shown in FIG.

If the result of the above calculation indicates that the substrate has run out, a message to that effect is displayed on the screen of the monitor TV 15 and an alarm is displayed by the buzzer 23.

Next, as a result of the calculation, if the lens L does not break, the lens L is placed on the lens holder 13 and the optical characteristics of the optical center of the lens L are measured. If the measured value is different from the spherical power and the cylindrical power of the already input lens data, if a difference is found, a message to that effect is displayed on the monitor TV 15 screen and an alarm is displayed by the buzzer 23.

That is, the arithmetic control circuit (comparing means) 20 of the lens meter 1 compares the measured optical characteristics of the lens L to be processed with the inputted prescription data data to determine whether or not they match, If they match, a message indicating that they match is displayed on the screen. If they do not match, a message indicating that they do not match is displayed on the screen and an alarm is displayed by the buzzer 23. It is.

As described above, since the lens meter 1 determines whether or not the measured optical characteristics of the lens L to be processed match the inputted prescription data, the lens meter 1 can quickly and accurately determine the lens to be processed. It is not necessary to compare the numerical value of the measured result and the numerical value of the prescription data data one by one as in the related art.

If the optical characteristics of the lens L to be processed are also the same as the prescription data, that is, if the lens L to be processed matches the prescription data data, the lens holder 1
The frame frame F, the eye point P, the astigmatic axis X of the prescription data, the optical center O of the lens L to be processed, and the cylindrical axis X 'are fixedly displayed on the screen of the monitor TV 15 above 3.

In this case, the cylinder axis X 'is the astigmatism axis X displayed on the monitor TV 15, and the optical center O is the eye point P.
The position of the lens L to be processed is adjusted while looking at the monitor TV 15 so that the respective values coincide with each other. Thus, the monitor
Since the cylindrical axis X 'may be made to coincide with the astigmatic axis X displayed on the TV 15, it is not necessary to read the numerical value of a scale (not shown) provided on the monitor TV 15 as in the related art.

After the suction plate 18 is held by the suction plate holder 17 of the suction plate mounting lever 16, the suction plate 1 is rotated by 90 degrees, whereby the suction plate 1 is rotated.
The center of 8 is matched with the optical center O of the lens L to be processed.
Next, the suction plate mounting lever 16 is depressed, and the suction plate 18 of the suction plate mounting lever 16 is sucked to the lens L to be processed on the lens receiving base 13. At the time of this suction, the center of the suction disk 18 and the optical center O of the lens L to be processed are matched.

In this manner, the frame frame F, the eye point P, the astigmatic axis X of the prescription data, the optical center O of the lens L to be processed, and the cylindrical axis X 'coincide with each other, and the center of the suction disk 18 is moved to the lens L to be processed. By simply pushing down the suction plate mounting lever 16 so as to coincide with the optical center O, the suction plate 18 can be sucked to the lens L to be processed, so that the conventional suction device is unnecessary and the suction device is not processed. Since there is no need to set the lens L, the operation of attaching the suction disk is simplified.

Then, after the suction disk 18 is suctioned to the lens L to be processed, the suction disk 18 is set on the ball-sliding machine 6, and
The ball mill 6 grinds the lens to be processed so that the astigmatic axis is directed to a target direction when the lens is mounted on the lens frame of the glasses.

[Second Embodiment] Next, FIGS. 11 to 16 show a second embodiment.

The lens meter 30 determines whether or not the selected lens L to be processed is uncut with respect to the eyeglass frame MF (FIG. 3) by comparing the image of the lens L and the display image of the lens frame F. This is confirmed by optically overlapping. Moreover, in the present embodiment, the lens diameter input unit 2 shown in FIG.
1a is omitted, and the arithmetic control unit 20 is replaced with the arithmetic control unit 2
A control circuit instead of 0 'is used.

The main body 31 of the lens meter 30 shown in FIG.
Has a U-shaped side shape. LCD at the bottom
A display unit 32 such as a (liquid crystal display device) is formed, and a lens mounting table 33 having a truncated cone shape is provided on a right side wall 31a that is formed to be one step higher. A ring mask 34 (see FIG. 12) having a ring-shaped light transmitting portion 32 a is mounted inside the lens mounting table 33, and half mirrors 35 and 36 are provided above the display unit 32 and the lens mounting table 33, respectively. Are located. The main body 3 located above the display unit 32
An opening communicating with the cylinder 37 provided on the outer surface is formed in the upper part.

As shown in FIG. 12, the lens meter 30 has a measurement optical system and first and second observation optical systems for forming a first observation optical path and a second observation optical path.

The measuring optical system includes a light source 38, a condenser lens 39, an aperture mask 40, a collimator lens 41, a half mirror 36, a ring mask 34, a reflection mirror 42,
It has optical members such as a focus lens 43 and a CCD 44. The illumination light from the light source 38 is supplied to the condenser lens 39, the aperture mask 40, the collimator lens 41, the half mirror 36, the ring mask 34, the reflection mirror 42,
The processing target lens L mounted on the lens mounting table 33 is projected onto the CCD 44 via the focus lens 43. As shown in FIG. 13, this projected image becomes an annular image A when there is no cylindrical refraction, and becomes a distorted elliptical image B when there is cylindrical refraction. Then, the optical characteristics of the lens L to be processed are measured by the arithmetic and control unit 20 ′ based on the projection image,
The result is displayed on the display surface 32a of the display unit 32 as shown in FIG.

The first observation optical system includes a display section 32, a half mirror 35, a lens 45, a reflection mirror 46, and an eyepiece 4.
7 and the like. And the display surface part 32a
The image is projected onto the observation eye E via a first observation optical system formed by the half mirror 35, the lens 45, the reflection mirror 46, the eyepiece 47 and the like.

The second observation optical system has optical members such as a half mirror 36, a lens 48, a half mirror 35, a lens 45, a reflection mirror 46, and an eyepiece 47. And
The lens L to be processed, which is mounted on the lens mounting table 33 in which the ring mask 34 is incorporated, is moved to the half mirror 36, the lens 48, the half mirror 35, the lens 45, and the reflection mirror 4.
6. Projection is made to the observation eye E via the second observation optical path formed by the eyepiece lens 47 and the like. The lens 48 is for adjusting the magnification of the lens L to be processed and the display magnification of the display unit 32.

As described above, the lens 45, the reflection mirror 46, and the eyepiece 47, which are commonly used in the first and second observation optical paths, make the display on the display surface 32a of the display unit 32 and the lens L to be processed. They form a common optical path for superimposed viewing at the same time.

Further, as shown in FIG.
0 ′ performs arithmetic processing on the data of the prescription data to display the frame shape D1, the frame center D2, the pupil center D3, the astigmatic axis X, and the like on the display surface 32a. At this time, the astigmatic axis X is displayed with a predetermined angle α as shown in FIG.

The lens L to be processed is manually adjusted while viewing the display surface 32a, for example, so that the direction of the cylindrical axis X 'coincides with the direction of the astigmatic axis X and the optical center O coincides with the pupil center D3. Lens L to be processed on 32a
Check whether or not is out of substrate.

When it is necessary to consider the lens surface such as a multifocal lens (the bifocal lens in FIG. 16), observe the lens surface and confirm that the near portion L1 'is correctly included in the frame shape D1. I do. Also, the near pupil P
By inputting D in advance, the near pupil center D4 may be displayed.

Note that the display surface 32 is controlled by the arithmetic control unit 20 '.
The astigmatism axis X, frame shape D1, frame center D2, pupil center D3, etc. displayed at a position at which the pupil center D3 coincides with the measurement optical axis of the measurement optical system, or a position shifted by a predetermined amount as necessary. And the cylindrical axis X ′ and the optical center of the lens L to be processed may be aligned with the astigmatic axis X and the pupil center D3. With this configuration, by providing the processing jig mounting means as shown in FIG. 1, after confirmation, the suction disk can be suctioned without moving the lens L to be processed, and the suction can be performed similarly to the first embodiment. Installation work of the panel can be easily performed.

Here, the lens meter 30 determines whether or not there is a difference between the inputted prescription data data and the measured optical characteristic of the lens L to be processed. And a message to that effect is displayed on the display screen 32a, and a warning is given by, for example, the buzzer 23 of the first embodiment.

In the second embodiment, similarly to the first embodiment, the lens meter 30 determines whether or not the measured optical characteristics of the lens L to be processed match the inputted prescription data data. The determination of the lens to be processed can be performed quickly and accurately, and it is not necessary to compare the numerical value of the measured result and the numerical value of the prescription data one by one as in the related art.

[0045]

According to the present invention, the lens to be processed can be determined quickly and accurately, and it is not necessary to compare the numerical value of the measured result and the numerical value of the prescription data one by one as in the prior art.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a lens meter according to the present invention.

FIG. 2 is a circuit diagram showing a connection relationship between a control circuit in the lens meter shown in FIG. 1 and another device.

FIG. 3 is an explanatory diagram showing a relationship between the lens meter shown in FIG. 1 and other devices.

FIG. 4 is an explanatory diagram of a frame PD of a glasses frame.

FIG. 5 is an explanatory diagram of a pupil PD of a wearer.

FIG. 6 is an explanatory diagram showing a relationship between a lens frame, an eye point, and an astigmatic axis.

FIG. 7 is an explanatory diagram showing a relationship between an optical center of a lens to be processed and a cylindrical axis.

FIG. 8 is an explanatory diagram showing a relationship between a lens to be processed and a lens frame of an eyeglass frame.

FIG. 9 is a perspective view of a lens holder adapter used in the present invention.

FIG. 10 is a sectional view taken along the line VIII-VIII in FIG. 9;

FIG. 11 is a perspective view showing a second embodiment of the lens meter according to the present invention.

FIG. 12 is an optical path diagram of the lens meter shown in FIG.

FIG. 13 is an explanatory diagram showing a projection image.

FIG. 14 is an explanatory diagram showing a displayed lens frame and the like.

FIG. 15 is an explanatory diagram showing directions of displayed astigmatic axes.

FIG. 16 is an explanatory diagram showing a lens to be processed (bifocal lens).

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lens meter 3 Objective optometer 4 Subjective optometer L Worked lens

Claims (1)

(57) [Claims] 1. A lens to be processed, comprising: input means for inputting prescription data; measuring means for measuring optical characteristics of a lens to be processed; and comparing means for comparing said prescription data with optical characteristics. Determination device.