JPH08247895A - Determination equipment for machined lens - Google Patents

Abstract

PURPOSE: To contrive promptness and exactness to determine whether or not a machined lens agrees to prescribed data by inputting the optical characteristic value of the machined lens to compare with the prescribed data. CONSTITUTION: An installing protruded part 14 is interposed above a lens cradle 13. A sucker installing lever 16 serving as machining jig-installing means is horizontally and rotationably and vertically and drivably mounted on the lower part of the protruded part 14 centered with respect to an axis A-A'. A sucker holder 17 is provided on the intermediate part of the sucker installing lever 16 to demountably hold the installing shaft 18a of a sucker 18 made of rubber serving as a machining jig. Now, a machined lens L is mounted on a cradle 13 to measure the optical characteristics of the optical center of the lens L. Comparison is made to already inputted prescribed lens data on spherical degree, cylindrical degree. The messages are displayed on a TV screen. Thus, determination is made whether or not the optical characteristics of the machined lens L agree to the inputted prescribed data to display on the screen. Thus, determination on the machined lens L and the prescribed data are promptly and exactly done.

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 refraction and astigmatism axis of the customer's eye are measured, and prescription data data for the spectacle lens is created based on this measurement, and the customer is allowed to select the lens frame of the spectacles, the type of lens, etc. This information is sent to the processing plant. At this processing site, the lens to be processed is selected based on the above information, and the orientation of the astigmatic axis and optical center of the lens to be processed are selected.
Measure the (optical axis) etc. with a lens meter and mark the lens to be processed based on the above measurement so that the astigmatic axis will face the target direction when the lens to be processed is processed and mounted on the lens frame of the glasses. Make a point.

Next, the target lens (template) of the spectacle frame is placed on the lens to be processed, and the optical axes and the directions of the astigmatism axes of the two are aligned, and the peripheral edge of the target lens is the peripheral edge of the lens to be processed. Confirm whether or not it can be processed from outside to outside, that is, whether or not the base material is cut. This workability confirmation work includes a direct-viewing type for direct visual recognition and a projection type by projection.

In this confirmation work, when the peripheral edge of the target lens shape goes out from the peripheral edge of the lens to be processed, it is impossible to perform processing, so it is necessary to replace with a lens having a larger diameter. On the other hand, if it does not go outside, it is possible to process it.Therefore, use a suction device to attach the suction plate, which is a processing jig, to the center of the lens to be processed in line with the axis of the optical axis.
This suction plate is attached to the lens holding shaft of the ball slide machine.

[0005]

By the way, the determination as to whether or not the selected lens to be processed matches that of the prescription data is made by measuring the lens to be processed with a lens meter, and the measured result and the prescription data are measured. Compare with the data.
That is, the numerical values of the measurement results and the numerical values of the prescription data are checked one by one to determine whether they match. Therefore, there is a problem that the confirmation work is very troublesome, and moreover, the numerical value is mistaken and the judgment is wrong.

Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide an apparatus for determining a lens to be processed, which does not require comparison of numerical values and can determine a lens to be processed quickly and accurately. To do.

[0007]

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

[0008]

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. Further, in FIG. 3, reference numeral 2 is an IC card data recording / reproducing apparatus including the IC card reader 2a and IC reader / writer 2b shown in FIG. 3, 3 is an objective optometer, 4 is a subjective optometer, and 5 is a customer. A management computer, 6 is a ball-sliding machine for processing the shape of the lens to be processed, and 7 is a frame reader for measuring the shape of the lens frame of the spectacle frame, the distance between 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 customer management computer 5, the ball slide machine 6 and the like can mutually transmit information.

A keyboard 9 is provided on the lower portion of the front surface of the main body 8 of the lens meter 1 shown in FIG. 3, as shown in FIG. The keyboard 9 has a large number of operation switches 10 used for measuring the optical characteristics of the lens, a large number of switches 11 for setting a data input mode, and a numeric keypad 12 for inputting numerical values as data. Further, at the center of the front surface of the main body 8, there is provided a lens pedestal 13 in which a sensor for measuring the lens shape is incorporated as a measuring unit 13a (measuring means) in FIG.

The lens pedestal 13 includes
A lens cradle adapter A as shown in can be attached. A mortar-shaped recess a in the center of adapter A
And a small hole b is formed in the center of the recess a. When the adapter A is mounted on the lens pedestal 13 and used, the center of the recess a, that is, the small hole b.
The center Ob of the measurement unit 13a is made to coincide with the center of the measurement unit 13a. In this state, the lens to be processed is placed in the recess a, and the optical characteristics of the center of the outer shape of the lens to be processed are measured, so that the optical center can be calculated from the prism amount by the calculating means described later. It is configured. According to this, it is possible to deal with a lens to be processed whose optical center deviates from the center of its outer shape.

A mounting projection 14 integral with the main body 8 is provided above the lens receiving base 13. A lens retainer and 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 above-mentioned 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 horizontally rotatable about A ′ and to be vertically movable. The rotation operation and the vertical driving operation of the suction plate mounting lever 16 are performed manually, but may be performed automatically. A suction plate holder 17 is provided in the middle of the suction plate mounting lever 16, and a mounting shaft portion 18a of a rubber suction plate 18 as a processing jig is detachably held by the suction plate holder 17. It has become.

Inside the main body 8, a control circuit 19 as shown in FIG. 2 is provided. 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 (outer peripheral information input means for the lens to be processed), a frame PD.
The input unit 21b, the pupil PD input unit 21c, the lens data input unit 21d (lens data input means), the eccentricity amount input unit 21e, and the like are included. Moreover, this data input unit 21
The calculation control unit 20 (calculation means) selects the lens diameter, the frame PD, the pupil PD, the lens data, the amount of eccentricity (the amount of movement for producing the prism action), etc., selected by the mode setting switch 11 shown in FIG. To enter. The frame PD input unit 21
b and the pupil PD input section 21C constitute an eye point input means. Further, the frame PD indicates the distance between the lens frame centers of the two lens frames (frame frames) F of the glasses frame MF, that is, the distance d1 between the geometric centers, as shown in FIG. The distance d2 between the centers of the pupils of the wearer's eyes as shown in FIG.

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

Further, the pupil PD input section 21c and the lens data input section 21d are directly input with data from the objective optometer 3 or the subjective optometer 4 online or by an IC card or the like. However, when the 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. While looking at the prescription data and the like obtained as a result, the necessary data is input by operating the mode setting switch 11 and the ten key 12 of the keyboard 9.

Frame shape data and lens data are input to the arithmetic control unit 20 from the IC card reader 2a of the IC card data recording / reproducing apparatus 2 and the measuring unit (sensor) 13a provided on the lens receiving base 13 is also input. A measurement signal is input. The IC card reader 2a as the frame shape information input means of the glasses frame includes a lens frame shape (frame shape) of the glasses frame measured by the frame reader 7, a lens frame distance or a frame PD (lens frame center interval). Data such as distance) and lens data such as an optimal trial lens used during the optometry by the objective optometer 3 or the subjective optometer 4 are input. In addition, frame PD
Is input to the arithmetic control unit 20 via the IC card reader 2a if measurement is possible with the frame reader 7, but if measurement is not possible with the frame reader 7, it is input from the frame PD input unit 21b using the ten-key 9 described above. To do.

Here, the lens data input to the arithmetic 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 the 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, from the arithmetic and control unit 20, the processing data including the frame frame shape data is input to the IC reader / writer 2b of the IC card data recording / reproducing apparatus 2 and the data, shape and lens of the lens L to be processed are processed. A frame or the like is input to the monitor TV 15 and displayed. The IC reader / writer 2b inputs the processing data necessary for controlling the grinding processing of the peripheral edge of the lens to be processed into the ball shaving machine 6. In addition, the arithmetic control unit 2
0 controls driving of the buzzer 23.

The arithmetic control unit 20 is composed of a frame PD and a pupil.
Position of eyepoint P from PD to frame F
(See FIG. 6) is calculated. Then, the eye point P and the optical center O of the lens L to be processed are made to coincide with each other, and it is calculated whether or not the base material is cut off in the selected eyeglass frame MF (FIG. 3). At this time, a display in which the frame F and the lens L to be processed are superimposed on the monitor TV 15 is performed so that the uncut condition of the lens can be visually observed.
In addition, the eye point P of the prescription data shown in FIG.
The optical center O of the lens L to be processed shown in FIG. 8 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. The display is made to match as shown in FIG.

When the base material is cut off as a result of the above calculation, 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, when the lens L to be processed does not become a base cut, the lens L to be processed is placed on the lens holder 13 and the optical characteristics of the optical center of the lens L to be processed are measured. Then, this measured value is compared with the spherical power and the cylindrical power of the lens data already input, and if they are different, a message to that effect is displayed on the screen of the monitor TV 15 and an alarm is also 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 judge whether or not they match. When they match, a message indicating that they match is displayed on the screen, and when 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. Is.

As described above, the lens meter 1 determines whether or not the measured optical characteristics of the lens L to be processed and the input prescription data data match, so that the lens to be processed can be quickly and accurately determined. Therefore, unlike the conventional case, it is not necessary to compare the measured value of the measurement result with the numerical value of the prescription data one by one.

If the optical characteristics of the lens L to be processed are in accordance with the prescription data, that is, if the lens L to be processed and the prescription data data match, the lens cradle 1
The frame frame F, the eye point P, the astigmatism axis X of the prescription data and the optical center O of the lens L to be processed, and the cylinder axis X ', which are fixedly displayed on the screen of the monitor TV15 on the screen No. 3, are aligned.

In this case, the cylinder axis X'is on the astigmatic axis X displayed on the monitor TV15, and the optical center O is on the eyepoint P.
The position of the lens L to be processed is adjusted while observing the monitor TV 15 so that the two coincide with each other. Like this, monitor
Since it suffices that the cylinder axis X ′ coincides with the astigmatic axis X displayed on the TV 15, it is not necessary to read the numerical value of the scale (not shown) provided on the monitor TV 15 as in the conventional case.

Then, after holding the suction disk 18 in the suction disk holder 17 of the suction disk mounting lever 16, the suction disk mounting lever 16 is rotated by 90 degrees, so that the suction disk 1 is rotated.
The center of 8 is aligned with the optical center O of the lens L to be processed.
Next, the suction plate mounting lever 16 is pushed down to suck the suction plate 18 of the suction plate mounting lever 16 onto the lens L to be processed on the lens holder 13. At the time of this suction, the center of the suction plate 18 and the optical center O of the lens L to be processed are aligned.

In this way, 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 ', and the center of the suction plate 18 is made into the lens L to be processed. Since the suction plate 18 can be sucked onto the lens L to be processed by simply pushing down the suction plate mounting lever 16 so as to match the optical center O of the above, the conventional suction device is unnecessary, and the suction device is processed on the suction device. Since it is not necessary to set the lens L, the work of attaching the suction cup is simple.

Then, after the suction plate 18 is sucked onto the lens L to be processed, the suction plate 18 is set on the ball slide machine 6,
The ball mill 6 grinds the lens to be processed so that the astigmatic axis faces the intended direction when mounted on the lens frame of the eyeglasses.

[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 cut into the base frame with respect to the spectacle frame MF (FIG. 3) by displaying an image of the lens L to be processed and a display image of the lens frame F. It is confirmed by optically overlapping. Moreover, in the present embodiment, the lens diameter input section 2 shown in FIG.
1a is omitted, and the arithmetic control unit 20 is replaced by the arithmetic control unit 2
The control circuit replaced with 0 'is used.

The main body 31 of the lens meter 30 shown in FIG.
Has a U-shaped side surface shape. LCD on the bottom
A display unit 32 such as a (liquid crystal display device) is formed, and a right-side wall 31a formed to have a single step height is provided with a lens mounting table 33 in the shape of a truncated cone. A ring mask 34 (see FIG. 12) having a ring-shaped light transmitting portion 32a is mounted inside the lens mounting table 33, and half mirrors 35 and 36 are provided on the display section 32 and the lens mounting table 33, respectively. It is arranged. The main body 3 located above the display unit 32
An opening communicating with a cylinder 37 provided on the outer surface is formed in the upper part of the unit 1.

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

The measurement optical system includes a light source 38, a condenser lens 39, a diaphragm 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. Then, the illumination light from the light source 38 includes a condenser lens 39, a diaphragm mask 40, a collimator lens 41, a half mirror 36, a ring mask 34, a reflecting mirror 42,
The lens L to be processed 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 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 ′ from this projected 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 lens 4.
It has optical members such as 7. Then, the display surface portion 32a is
It is projected onto the observation eye E through the first observation optical system formed by the half mirror 35, the lens 45, the reflection mirror 46, the eyepiece lens 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 reflecting mirror 46 and an eyepiece lens 47. And
The lens L to be processed mounted on the lens mounting table 33 in which the ring mask 34 is incorporated is attached to the half mirror 36, the lens 48, the half mirror 35, the lens 45, and the reflection mirror 4.
6. The image is projected on the observation eye E through 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 lens 47, which are commonly used in the first and second observation optical paths, display the display surface 32a of the display unit 32 and the lens L to be processed. A common optical path is formed so that they can be viewed at the same time by overlapping.

Further, as shown in FIG. 14, the arithmetic control unit 2
0'calculates the data of the prescription data to display the frame shape D1, the frame center D2, the pupil center D3, the astigmatic axis X, etc. on the display surface 32a. At this time, the astigmatic axis X is displayed with a predetermined angle α as shown in FIG.

Then, the lens L to be processed is manually adjusted while looking at the display surface 32a, and the cylindrical axis X'direction is made to coincide with the astigmatic axis X direction, and the optical center O is made to coincide with the pupil center D3. Processed lens L on 32a
Check to see if the machine is in a bare state.

When it is necessary to consider the surface of a lens such as a multifocal lens (bifocal lens in FIG. 16), the lens surface is observed to check whether the near portion L1 'is correctly inside the frame shape D1. To do. Also, the near pupil P
The near pupil center D4 may be displayed by inputting D in advance.

It should be noted that the display surface 32 is displayed by the arithmetic control unit 20 '.
The astigmatic axis X, the frame shape D1, the frame center D2, the pupil center D3, and the like displayed on a are at positions where the pupil center D3 and the measurement optical axis of the measurement optical system coincide with each other, or are displaced by a predetermined amount as necessary. Alternatively, 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. According to this structure, by providing the processing jig attaching means as shown in FIG. 1, after confirmation, the suction plate can be sucked without moving the lens L to be processed, and the suction is performed as in the first embodiment. You can easily install the board.

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

In the second embodiment as well, as in the first embodiment, the lens meter 30 determines whether or not the measured optical characteristics of the lens L to be processed and the input prescription data data match. The determination of the lens to be processed can be performed quickly and accurately, and it is not necessary to compare the numerical values of the measured measurement results with the numerical values of the prescription data one by one as in the conventional case.

[0045]

According to the present invention, the lens to be processed can be judged quickly and accurately, and it is not necessary to compare the measured values of the measurement results with the values of the prescription data one by one as in the conventional case.

[Brief description of 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 spectacle frame.

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

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 cylinder axis.

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

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

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

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

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

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

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

FIG. 15 is an explanatory diagram showing the direction of the displayed astigmatic axis.

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

[Explanation of symbols]

 1 Lens meter 3 Objective type optometer 4 Subjective type optometer L Lens to be processed

Claims (1)

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