JPH08233694A - Lens meter - Google Patents

Abstract

PURPOSE: To provide a lens meter by which the cylindrical axis of a lens to be worked can be made to coincide with a prescribed astigmatic axial angle even if a numeric value of a scale is not read. CONSTITUTION: In a lens meter provided with a lens meter 1 to measure an optical characteristic of a lens L to be worked placed on a lens receiving stand 13 and a point marking means to mark a point on the lens L to be worked, the lens meter is provided with prescribed data input means 11 and 12 to input prescribed data and a monitor TV 15 to display the astigmatic axis X on the basis of prescribed data and the cylindrical axis X' of the lens to be worked on the basis of the optical characteristic.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens meter for displaying an astigmatic axis and a cylindrical axis of a lens to be processed.

[0002]

2. Description of the Related Art Conventionally, in general, when making glasses,
First, the eye refraction and astigmatic axis of the customer's eye are measured, prescription data is created for the spectacle lens based on this measurement, and the customer selects the lens frame of the spectacles, the type of lens, etc. Send information 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 of this lens and the optical center (optical axis) are selected.
Etc. with a lens meter, and when processing the lens to be processed and mounting it on the lens frame of the eyeglasses, the astigmatic axis will face the target direction Based on the above measurement, the marking point on the lens to be processed (marking) To do.

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 marking point of the lens to be processed is performed by aligning the cylindrical axis of the lens to be processed displayed on the display section of the lens meter with the astigmatic axis angle of the prescription.
This is done by reading the numerical value of the scale attached to the display for the angle of the cylinder axis displayed on the display, and adjusting the position of the lens to be processed so that this numerical value is the prescription astigmatic axis angle. It is a thing. Thus, the position of the lens to be processed must be adjusted while reading the angle of the cylindrical axis of the lens to be processed on the scale, which is very troublesome.

The present invention has been made in view of the above problems, and an object thereof is to provide a lens meter capable of easily matching the cylindrical axis of the lens to be processed with the astigmatic axis angle of the prescription. is there.

[0007]

In order to achieve the above object, the present invention provides an optical measuring means for measuring the optical characteristics of a lens to be processed placed on a lens pedestal, and a marking point on the lens to be processed. In a lens meter having a marking means for performing, a display for displaying prescription data input means for inputting prescription data, an astigmatic axis based on the prescription data, and a cylindrical axis of a lens to be processed based on the optical characteristics. And means are provided.

[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). 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.
The eyepoint P of the prescription shown in FIG. 6 and the optical center O of the lens L to be processed shown in FIG. 7 are aligned as shown in FIG. 8, and the astigmatic axis X of the prescription shown in FIG. The cylindrical axis X ′ of the lens L to be processed shown in FIG. That is, the outer shape of the lens to be processed, the graphic showing the astigmatic axis X, and the graphic showing the cylindrical axis X ′ are displayed on the same screen.

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. The lens data may be compared with the measurement result while observing the prescription data without inputting the lens data to the lens meter to determine whether or not the lens is a lens to be processed.

Furthermore, if the optical characteristics of the lens L to be processed are in accordance with the prescription data, the frame frame F, the eye point P, and the astigmatism of the prescription, which are fixedly displayed on the screen of the monitor TV 15 on the lens cradle 13. Axis X and lens to be processed L
The optical center O and the cylinder axis X'of are matched.

In this case, the cylindrical 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 to match the cylinder axis X ′ with the astigmatism 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, and the cylinder axis X ′ can be read. X'can be easily matched with the astigmatic axis X.

Instead of graphically displaying the astigmatic axis X, the numerical value of the cylindrical axis angle of the cylindrical axis X'as well as the cylindrical axis X ', and the numerical value of the astigmatic axis X in the vicinity of this numerical value may be displayed. .

Suction board holder 1 of suction board mounting lever 16
After holding the suction plate 18 on 7, the suction plate mounting lever 16 is rotated by 90 degrees so that the center of the suction plate 18 coincides 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 prescription astigmatism axis X, the optical center O of the lens L to be processed, and the cylindrical axis X ′ are aligned with each other, and the center of the suction plate 18 is set to the lens L to be processed. Simply push down the suction plate mounting lever 16 so that it coincides with the optical center O, and the suction plate 1 is attached to the lens L to be processed.
Since 8 can be adsorbed, a conventional adsorber is not required, and since it is not necessary to set the lens L to be processed on the adsorber, the work of attaching the adsorber becomes 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] FIGS. 11 to 16 show a second embodiment.

The lens meter 30 determines whether or not the selected lens L to be processed becomes a base cut 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 reflection 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 reflecting mirror 46, and the eyepiece lens 47 which are commonly used in the first and second observation optical paths are used for displaying 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 ′ is a frame shape D1, which is calculated by processing prescription data.
The frame center D2, the pupil center D3, the astigmatic axis X, etc. are displayed on the display surface 32a. At this time, the astigmatic axis X is displayed with a predetermined angle α as shown in FIG.

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

When the lens surface such as a multifocal lens (the bifocal lens in FIG. 16) must be taken into consideration, the lens surface is observed to check whether the near vision 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.

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.

If there is a difference between the refractive power of the input prescription data and the measured refractive power of the lens L to be processed, the warning means detects this difference and displays a message to that effect on the display screen 32a. At the same time, the warning is given by, for example, the buzzer 23 of the first embodiment.

Also in the second embodiment, as in the first embodiment, the cylinder axis X'can be made to coincide with the astigmatic axis X displayed on the display screen 32a, so that it can be displayed on the display screen as in the prior art. You don't have to read the numbers on the scale
The cylinder axis X ′ can be easily matched with the astigmatic axis X. Instead of displaying the astigmatic axis X,
The numerical value of the astigmatic axis angle is lit in the direction indicated by, and the lens L to be processed is aligned so that the cylinder axis X ′ coincides with this lit position.
The position of may be adjusted.

[0044]

According to the present invention, the cylindrical axis of the lens to be processed can be easily matched with the astigmatic axis of the prescription data.

[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 2a IC card reader 13 lens pedestal 15 monitor TV L lens to be processed X astigmatic axis X'cylindrical axis

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[Procedure amendment]

[Submission date] February 19, 1996

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 1

[Correction method] Change

[Correction content]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

[0007]

SUMMARY OF THE INVENTION The present invention, in order to achieve the above object, comprising an optical measuring means for measuring the optical characteristics of the workpiece lens, and a mark point unit for performing Shirushiten the workpiece lens The lens meter is provided with prescription data input means for inputting prescription data, display means for displaying an astigmatic axis based on the prescription data, and a cylindrical axis of the lens to be processed based on the optical characteristics. And

Claims (2)

[Claims] 1. A lens meter comprising optical measuring means for measuring optical characteristics of a lens to be processed placed on a lens pedestal, and marking means for marking the lens to be processed with prescription data. A lens meter comprising: a prescription data input unit for inputting; an astigmatic axis based on the prescription data; and a display unit for displaying a cylindrical axis of a lens to be processed based on the optical characteristic. 2. The display means includes an outer shape of a lens to be processed,
The lens meter according to claim 1, wherein the graphic showing the astigmatic axis and the graphic showing the cylindrical axis are displayed on the same screen.