JPH0996784A - Lens specifying device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lens specifying device capable of easily and rapidly obtaining lens information. SOLUTION: The device is provided with a lens meter 60 for measuring and obtaining the distribution of lens refractive characteristics of a lens to be inspected, information recording/reproducing device 54 with many pieces of lens information recorded, and an arithmetic and control circuit 51a for comparing the distribution of the lens refractive characteristics of the inspected lens measured by the lens meter 60 with many pieces of lens information recorded by the information recording/reproducing device 54, and obtaining which piece of lens information is suitable for the measured and inspected lens.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens specifying device for obtaining the manufacturer and type (model name) of a lens to be inspected from the lens refraction characteristics such as the distribution of refractive power and the distribution of astigmatism of the lens to be inspected. It is a thing.

[0002]

2. Description of the Related Art In recent years, as a spectacle lens, a progressive multifocal lens and a distance aspherical lens have become widespread. For example, in a progressive multifocal lens, a lens is provided with a distance portion in which the spherical power does not change and a near portion in which the refractive power is continuously changed from the boundary of the distance portion. The distance portion is generally located above the center of the lens, and the near portion is often slightly shifted left and right from the center of the lens and is located roughly below the lens. Moreover, the near portion and the intermediate portion between the near portion and the far portion, which can be actually used, are not provided on the entire lower portion of the lens but are relatively narrow in width from the center of the lens to the lower edge. Extending to

However, the position, shape, change in refractive power, etc. from the intermediate portion to the near portion vary depending on the manufacturers, and even under the same circumstances, the same manufacturer greatly varies depending on the model name and the like.

Therefore, when a person wearing glasses using a progressive multifocal lens of a certain model name wears glasses using a progressive multifocal lens of a different model name, he or she does not feel familiar with the glasses and feels good. It's bad.

[0005]

However, since there are few people who remember the manufacturer and model name of such glasses, when inserting a new lens into the glasses frame when the glasses are damaged, the same lens must be used. It was difficult to choose.

[0006] There are also types of glasses used according to the place of use, such as sports types, drive types, indoor types, etc. (perspective, middle, near, near, distant types, etc.). ). However, it is not often difficult to know which type of glasses is currently used. For example, despite the fact that the glasses currently in use are of the medium and near type used indoors, the type of use is not known, so when using these glasses for driving a vehicle, etc., you may feel eye fatigue. Sometimes. In such a case, it is not clear what causes eye fatigue.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a lens specifying device capable of easily and quickly knowing lens information.

[0008]

In order to achieve this object, the invention of claim 1 is a lens measuring means for obtaining a distribution of lens refraction characteristics of a lens to be measured, and information in which a lot of lens information is recorded. The recording means and the distribution of the lens refraction characteristics of the lens to be measured measured by the lens measuring means are compared with a large number of pieces of lens information recorded in the information recording means to determine which of the measured lenses is measured. The present invention is characterized in that the lens identifying device is provided with a lens determining unit that determines whether or not the lens information corresponds to the lens information.

According to a second aspect of the present invention, the information recording means records lens information corresponding to lens refraction characteristics, model name, manufacturer, etc., and the lens determining means measures the lens measuring means. In addition, it is characterized in that the manufacturer of the test lens is obtained.

According to a third aspect of the present invention, there is provided subject information inputting means for inputting the refraction characteristic or prescription value of the eye to be inspected, and the information recording means stores intended use information of the subject lens corresponding to the refraction characteristic. The lens determining means records which of the lenses to be examined in consideration of the refractive characteristics of the lens to be measured measured by the measuring means and the refractive characteristics of the eye to be examined input by the subject information input means. It is characterized by determining whether or not the lens is intended for use.

The invention of claim 4 is for indoor use, sports use,
Purpose input means for inputting the purpose of use such as driving, optometry data input means for inputting optometry data such as eye refraction information of the eye to be inspected, lens measuring means for measuring lens information such as distribution of refractive power of glasses And comparing means for comparing the optometry data with the lens information, and comparing means for comparing and judging whether or not the glasses are suitable for the purpose of use, and notifying means for notifying the result obtained by the comparing means. It is characterized in that it is a lens identifying device.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of a lens identifying device according to the present invention will be described below with reference to the drawings.

(Embodiment 1) In FIG. 1 (a), reference numeral 50 is a maker or a host computer (hereinafter simply referred to as a computer) installed at a specific place. The computer 50 includes a personal computer body 51 and a monitor TV 52.
The personal computer main body 51 has an arithmetic control circuit 51a as a lens determining means as shown in FIG. 1 (b).

The arithmetic control circuit 51a includes a monitor television 52, a keyboard, an IC card reader, an interface (not shown) connected to an output section of an optometric apparatus such as a subjective optometric apparatus or an objective optometric apparatus. The input means 53 is connected, the information recording / reproducing device (information recording device) 54, and the measurement mode changeover switch 55.
Is connected. The input unit 53 is used for inputting data such as subject information such as the refractive characteristics of the eye to be examined, lens information and the like.

The keyboard is used to input data such as subject information such as refraction characteristics of the eye to be inspected, prescription data (prescription value) based on eye examination, or intended use of spectacles. Used for. This keyboard is used as data input means when inputting prescription data based on eye examination, and is used as purpose input means when used to input the purpose of use of glasses (glasses). . This can be used, for example, for reading (for indoor use),
For driving, sports, etc.

Further, the IC card reader (optometry data input means) stores information such as eye refractive power information of the subject I.
The eye refractive power of the subject is read from the C card and input to the arithmetic control circuit 51a.

Further, when the eye refracting power of the subject is unknown, the eye refracting power of the subject is measured by using an optometry device (optometry data input means) such as a subjective optometry device or an objective optometry device. The refraction characteristics of No. 1 are measured, and the measurement results are input to the arithmetic control circuit 51a via an interface (not shown) connected to the output unit of the optometry apparatus.

As the information recording / reproducing device 54,
A large-capacity recording device such as an optical disc device, a magneto-optical disc, or a hard disc is used. The measurement mode changeover switch 55 is used to switch between the progressive multifocal lens measurement mode and the lens use type measurement mode.

A lot of lens information is recorded in the information recording / reproducing device 54. As the lens information, there are information on the lens refraction characteristics, the product name (type name), the manufacturer, and the like, and information on the intended use of the lens 8 to be inspected corresponding to the refraction characteristics.

The lens refraction characteristics include the distribution of the refractive power of the lens to be inspected and the distribution of astigmatism. As the distribution of the refractive power of the lens to be tested, for example, the distribution of the total refractive power of the lens to be tested 8 (total refractive power data) as shown in FIGS. The partial refractive power (partial refractive power data) of is shown.

As the partial refractive power (partial refractive power) data, the refractive power data of the distance portion 16 and the near portion 17 of FIG.
It is also possible to use only the refractive power data of (near portion apex), the position data of the near portion 17 with respect to the position of the distance portion 16, and the like. Also,
As the partial refractive power data, a plurality of points of the lens 8 to be inspected, that is, points P arranged vertically and horizontally at equal pitches as shown in FIG.
Refractive power data of the portions 1 to P9 may be used.

Further, as the intended use information of the lens 8 to be inspected corresponding to the refraction characteristics, there are the types of glasses used depending on the place of use, and these types include sports type, drive type, indoor type, etc. Middle-near type, near-distance type, far-distance type, etc.). In this case, since the refracting power for the purpose of use is obtained in consideration of the refracting power of the eye to be inspected and the refracting power of the lens 8 to be inspected, the refracting power for the intended purpose and the type of glasses correspond to each other. Will be recorded in the information recording / reproducing device 54.

There are various examples of the distribution of the total refractive power of the lens to be inspected, but only one example is shown in FIG. 8 for reference. Further, the material of the lens to be inspected and the like can be input as lens information.

A lens meter 60 as a lens measuring means for measuring the distribution of the lens refraction characteristics of the lens under test is connected to the arithmetic control circuit 51a.

Further, RS-232 of the arithmetic control circuit 51a
A lens meter 71 of a large number of eyeglass stores 70 is connected to the C terminal 51b by a personal computer (hereinafter referred to as a personal computer).
72, a modem 73, a telephone line 74, and a modem 75. Moreover, as the lens meters 60 and 71, those having the configurations shown in FIGS. 1C and 2 are used. Next, the configuration of the lens meters 60 and 61 will be described.

In FIG. 2, lens meters 60, 61
Is an LED 1, 2, 3 as an irradiation light source, a collimator lens 4, a total reflection mirror 5, a target plate 6, an imaging lens 7, a total reflection mirror 9, a projection lens 10, and a pair of lines C.
It has CDs 11 and 12. Incidentally, 8 is a lens to be inspected.

The LEDs 1 to 3 are arranged on the front focal plane of the collimator lens 4 on a predetermined circle centered on the optical axis O of the optical system. The target plate 6 has a slit-shaped opening 6a.
Having. The target plate 6 is configured to move back and forth along the optical axis O of the optical system with the rear focal position of the collimator lens 4 as a reference position. The front focal position of the imaging lens 7 coincides with the reference position of the target plate 6, and the rear focal position of the imaging lens 7 is the back surface of the lens 8 to be inspected (the surface closer to the eye when worn as eyeglasses and worn). ) Of the apex position V).

The projection lens 10 is arranged between the total reflection mirror 9 and the pair of line CCDs 11 and 12, and the pair of CCDs 1
Reference numerals 1 and 12 are arranged on the rear focal plane of the projection lens 10. LEDs 1 to 3 are provided at the vertex position V on the front side of the lens 8 to be inspected.
The light source image is formed, and the magnification of the optical system of this lens meter and the positions of LEDs 1 to 3 are selected so that the radius of the circumference passing through each light source image is about 4 mm or less.

L of at least two of the three LEDs
When the LEDs are made to emit light in time series using the ED, an image of the opening 6a of the target plate 6 illuminated by the LEDs is formed on the line CCDs 11 and 12. When the target plate 6 is at the reference position and the lens 8 under test is not present in the optical system (0 diopter), the aperture 6 of the target plate 6
The center of the line pattern as the slit image of a is the optical axis O.
Is formed in accordance with. When the lens 8 to be inspected is inserted into the optical system, the slit image of the aperture 6a is blurred according to the power at the position where the slit image of the lens 8 to be inspected is formed, and the image forming position of the aperture 6a is changed to the optical axis. It deviates from O. Therefore, in order to cancel out the power of the lens 8 to be inspected,
That is, the target plate 6 is moved in the direction of the arrow A along the optical axis O so that the slit images of the openings 6a by the respective light sources are overlapped with each other, and the movement amount of the target plate 6 is obtained. The amount of movement of the target plate 6 measures the power of the lens 8 to be inspected.

This optical system is provided with a linear light beam projection light source 13 for projecting a linear light beam toward the lens 8 to be inspected from one side with the optical axis O as a boundary. A CCD camera 14 is provided on the other side of the optical axis O for receiving the linear light beam specularly reflected by the surface of the lens 8 to be inspected (the surface on the side far from the eye when worn as eyeglasses). There is.

The CCD camera 14 is connected to the arithmetic control circuit 15 shown in FIG. The linear light beam projection light source 13 and the CCD camera 14 constitute a three-dimensional shape measuring means for measuring a three-dimensional shape. The linear light beam projection light source 13 optically cuts the lens 8 to be inspected in the direction of arrow B. The specularly reflected light flux is received by the CCD camera 14.

The linear image formed on the CCD camera 14 becomes an image distorted according to the curvature of the lens 8 to be inspected. The image receiving output of the CCD camera 14 is input to the arithmetic control circuit 15. The arithmetic and control circuit 15 calculates the shape of the lens 8 to be inspected at the light cutting point based on the image receiving output. If this calculation is performed for each predetermined pitch pi, the three-dimensional shape C1 on the front surface side of the lens 8 to be measured can be measured. If the same measurement is performed for the shape of the back side of the lens 8 to be inspected, the three-dimensional shape C2 of the back side of the lens 8 to be inspected can be measured. At this time, a linear light beam projection light source 13 ′ for measuring the rear surface side and a CCD camera 14 ′ may be prepared separately from the linear light beam projection light source 13 for the front surface side measurement and the CCD camera 14 as shown in FIG. The linear luminous flux of the linear luminous flux projection light source 13 is guided to the back surface side of the lens 8 to be inspected using a total reflection mirror (not shown), and the specular reflection light flux is used by the CCD camera 14 using a total reflection mirror (not shown). It can also be configured to lead to. Instead of the linear light beam projection light source 13, a configuration in which a point light source is scanned in a one-dimensional direction may be adopted. As the three-dimensional shape measuring means, other known non-contact type or contact type means may be used. In FIG. 3, reference numeral 21 is a lens receiver.

Further, the thickness d of the lens 8 to be inspected can be measured based on the measurement results of the shapes of the front surface and the back surface of the lens 8 to be inspected and the position of the image on the TV camera 14. For example, the surface shape C1 obtained from the CCD camera 14 shown in FIG. 3 is as shown in FIG.
When the back surface shape C2 obtained from 4 ′ is as shown in FIG. 4B, the thickness d of the lens 8 to be inspected is defined by the following equation d = df + d0-db, where d0 is the reference thickness of the lens receiver 21. Although required, the measurement of the thickness d at the reference position of the lens 8 to be measured is not limited to this. For example, when three-dimensional shape measurement is performed using a contact probe or the like, the relative distance between the probe and the lens receiver 21 is measured. The thickness d of the lens 8 to be tested may be calculated by calculating the position.

Next, the calculation of the refractive index of the lens 8 to be inspected, the distribution of the refractive power thereof, and the specification of the manufacturer, model name, etc. of the lens 8 to be inspected will be described.

(1) Measurement of the lens to be inspected For example, in the case where a part of the lens of the spectacles using a progressive multifocal lens or the like is damaged, and if a new lens is to be put in the spectacle frame, first, It is necessary to specify the manufacturer and model name of the lens.

In this case, in any one of a number of eyeglass stores 70, for example, the measurement mode changeover switch 55 is operated to enter the progressive multifocal lens measurement mode, and the lens not damaged is used as the lens 8 to be inspected. 71.

Here, first, it is assumed that the lens 8 to be inspected is a spectacle lens as shown in FIG. The spectacle lens shown in FIG. 5 is a progressive multifocal lens, and in this FIG.
Reference numeral 16 is a distance portion, reference numeral 17 is a near portion, and reference numeral 18 is a progressive zone portion. The spherical power S changes from the distance portion 16 to the near portion 18, but the cylindrical power C and the axial angle A basically do not change. On the other hand, the shaded area of reference numeral 19 is an area where the cylindrical power C and the axial angle A change (side unused area).
It is. Here, in order to simplify the description, the lens 8
Assume that the astigmatism of is zero. Further, assuming that the position where the lens 8 to be inspected is initially placed is the reference position and this is the distance portion 16, the spherical power S in this distance portion 16 is measured.

The material of the lens 8 to be inspected is manufactured uniformly over the entire area of the lens, and it is considered that the material of the lens 8 to be inspected does not differ partially. It is assumed that the refractive index N is constant. And
As shown in FIG. 6, the thickness of the lens 8 to be inspected at the reference position as the measurement point of the spherical power S is d, and the rear focal length from the principal plane H to the focus F at the reference position is f. Further, the back focus from the back surface vertex V of the lens 8 to be inspected to the focal point F at this reference position is Bf, and generally, the curvature of the front side of the position where the lens 8 is first placed is C1, and the curvature of the back side thereof is C2. And

At this time, the following equation holds.

Bf = f * {1-C1 * d * (N-1) / N} (1) f = 1 / (N-1) * {C1-C2 + C1 * C2 * d * (N-1) / N} (2) By substituting the rear focal length f of the equation (2) into the rear focal length f of (1) and rearranging, it is possible to transform into a quadratic equation for the refractive index N.

N * N * Bf * (C1-C2 + C1 * C2 * d) + N (-Bf * C1 + Bf * C2-2Bf * C1 * C2 * d + C1 * d-1) + (-C1 * d + Bf * C1 * C2 * D) = 0 (3) Generally, there is a relationship of Bf = 1 / S between the back focus Bf and the spherical power S at the reference position. Therefore, this equation (3) is calculated according to the solution of a quadratic equation. When solved, the refractive index N of the lens 8 under test can be obtained.

Next, between the refractive index N, the curvature C1, the curvature C2, and the rear focal length f, if the lens 8 to be inspected is considered to be a thin lens, in general, according to the thin lens formula, S = 1 / f = (N-1) (C1-C2) ... (4) holds.

Therefore, if the curvatures at arbitrary positions of the lens 8 to be inspected are C1i ', C2i', the rear focal length is f ', and the spherical power is S', S '= 1 / f' = (N-1 ) (C1i′−C2i ′) (5) Here, the refractive index N is obtained by the equation (3), and C1i ′,
Since C2i ′ is obtained by the three-dimensional shape calculation means, S ′ is obtained as the spherical diopter at any position of the lens 8 to be inspected.

These calculations are carried out by the calculation control circuit 15, and the calculation results are displayed as images on the monitor 20 as constant frequency lines. In FIG. 5, the broken line indicates the constant frequency line.

Since information for obtaining the optical characteristics of the lens 8 to be inspected is obtained, aberration calculation and simulation can be performed by ray tracing.

Further, it is possible to remove the error due to the deviation of the lens 8 to be inspected from the reference position. Furthermore, even when the lens 8 to be inspected is tilted with respect to the optical axis when measuring the spectacle lens with a frame, the tilt can be corrected by measuring the three-dimensional shape.

(2) Identification of the lens to be inspected a. In this way, after obtaining the constant power line of the lens 8 to be inspected by the arithmetic control circuit 15 as shown in FIG. 5, the personal computer 72 is connected to the computer 50 through the communication lines such as the modem 73, the telephone line 74 and the modem 75. Then, the information recording / reproducing apparatus 5
The lens information recorded in 4 is made searchable. In this state, the constant power line information of the lens 8 to be tested, which is obtained by the lens meter 71, that is, the distribution data of the refractive power, is transferred to the arithmetic control circuit 51a of the computer 50, and the arithmetic control circuit 51a causes the information recording / reproducing device 54 to operate. It is compared with a large number of lens information recorded in.

In this comparison, the arithmetic control circuit 51a
Specifies the lens information closest to the measurement data, obtains the maker and model name from the lens information, and returns the information to the personal computer 71 of the spectacle shop 70 via the above-described communication line.
This allows the spectacle store 70 to know the manufacturer and model name of the lens 8 to be inspected from the personal computer 71.

Considering that the spectacle store 70 does not handle the lens 8 of the same manufacturer as the lens 8 to be measured as described above, or the customer desires a lens of a manufacturer other than that manufacturer, etc. By operating the personal computer 71 of the spectacle store 70, a list of manufacturers and model names having lenses with data similar to the measured lens 8 to be measured is displayed, or a diagram showing the distribution of the refractive power of this list is displayed. It can be displayed and used for explanations (consulting) to customers.

If the used type of the lens 8 to be inspected is unknown, the measurement mode changeover switch 55 is operated to enter the lens used type measurement mode. In this case, the refractive power information of the eye to be inspected is input to the arithmetic control circuit 51a using the input means 53, and the refraction characteristics of the lens to be inspected 8 are measured as described above. Based on this measurement, the arithmetic control circuit 51a determines that the measured lens 8 is a sports type, a drive type, or an indoor type based on the input refractive power information of the subject and the measured refraction characteristics of the lens 8. Etc. (far-distance type, middle-distance type, near-distance type, far-distance type, etc.), and monitor TV 52
To display.

B. In addition, when glasses are used for a long period of time, the frequency often does not match. In this case, it becomes difficult to see the surroundings with the glasses currently used.

Even in such a case, normally, in order to make new glasses, the refractive characteristics of the glasses currently in use are measured by the lens meter 71 as described above in the glasses store 70.
The measurement result is input to the arithmetic control circuit 51a by communication as described above.

On the other hand, in the spectacle store 70, the refractive power of the eye is inspected by an optometry device (optometry data input means) such as a subjective optometry device or an autorefractometer (not shown), and the measurement result is calculated by an arithmetic control circuit. 51a, or a prescription based on the measurement result, for example, prescription data in which lens data having a slightly weaker power than the actual power is described is input to the personal computer 72 by a keyboard (not shown) or the like, and this data is transmitted by communication. As described above, the data is input to the arithmetic control circuit 51a.

In addition to this, the purpose of using the glasses (that is, where to use the newly created glasses)
For example, for reading (for indoor use), for sports, for driving, etc. is input to the personal computer 72 by a purpose-of-use input means such as a keyboard and is input to the arithmetic control circuit 51a by communication.

By these inputs, the arithmetic control circuit 51a as the comparing means responds to the input purpose of use, from the refractive power of the current eye refraction characteristic data to the purpose of refraction or from the prescription based refraction. The refractive power (the refractive power of the prescription when the refractive power of the prescription has been prescribed in advance according to the purpose of use) is calculated.

For example, in the case where the actually measured distance dioptric power (the dioptric power matching infinity) and the near dioptric power are "distance--5d near-distance + 3d (addition dioptric power)", from this refractive power The refractive powers required according to the purpose of use are as shown in (i) to (iii) below.

(I) For driving If the purpose of use input to the arithmetic control circuit 51a is for driving, the above-mentioned value itself becomes the refractive power for driving.

That is, if the input purpose of use is for driving, the arithmetic and control circuit 51a has no problem with far and near vision. Therefore, the measured diopter is calculated as "distance for use-5d near-distance + 3d (addition diopter)". ] Is the refraction dioptric power for driving.

(Ii) For indoor use (for reading) Further, in the measured refractive power, the arithmetic control circuit 51a
If the input purpose of use is indoor use, the refractive power for distance is weakened, and the refractive power is calculated as, for example, "distance -4d or -4.5d near + 3d (addition power)".

(Iii) For sports Furthermore, if the input purpose of use is for sports, the arithmetic control circuit 51a does not need to look close, and it is better to see a good intermediate distance. Is set to “5-5d for distance use + 2d or + 2.5d for medium use (additional power)” and the like.

The operation control circuit 51a as a comparison means is
The refraction power thus obtained is compared with the refraction characteristics of the glasses currently used to obtain a power difference, and it is determined whether or not this power difference (comparison result) is within a predetermined power range. Then, the arithmetic control circuit 51a returns the result of the determination to the personal computer 72 of the eyeglass store 70 by communication, and displays the result of the determination on the monitor television of the personal computer 72. That is, in this determination, the arithmetic control circuit 51a causes the monitor TV (notification means) of the personal computer 72 to display that the frequency difference is within the predetermined range, and the frequency difference is outside the predetermined range. The display indicating that it is not displayed is displayed on the monitor TV of the personal computer 72. If the configuration of the arithmetic control circuit 51a and its peripheral devices is provided in the spectacle store 70, the results described in a and b above can be immediately obtained in the spectacle store 70 without transferring data by communication. Obtainable.

(Embodiment 2) Next, an embodiment will be described in which only the surface shape of the lens 8 to be inspected is measured and the rate of change in the refractive power of the progressive-focus lens is mapped.

When the lens 8 to be inspected is a spectacle lens, a progressive surface is formed on the front surface side, and the back surface side is often prescribed as a toric surface for astigmatism correction or a spherical surface when there is no astigmatism. The power of the back surface is constant over the entire surface of the lens, and the increase or decrease of the power depends only on the surface shape.

Therefore, similarly to the first embodiment, only the surface shape of the lens 8 to be measured by the three-dimensional shape measuring means and the power at the reference position by the optical system of the lens meter are measured. In the power measurement of the position where the lens 8 to be inspected is first placed,
It is possible to determine whether it is a toric surface or a spherical surface based on the frequency Sy obtained using the LED2 and the frequency Sx obtained using the LEDs 1 and 3. For example, when Sy = Sx, it is a spherical surface, and Sy and Sx are When they are not equal, it is toric. FIG. 7 shows the case where the back surface of the lens 8 to be inspected is a toric surface. In FIG. 7, reference numeral 22 indicates the strong main meridian direction (x direction) and 23 indicates the weak main meridian direction (y direction). Based on the power at the reference position measured by the optical system of the lens meter and the surface shape measured by the three-dimensional shape measuring means, the relative power at each position of the lens 8 to be measured is calculated. As a result, the relative frequency distribution of each part of the lens 8 to be inspected is obtained.

That is, assuming that the radius of curvature on the back side is constant, S = 1 / f = (N-1) (C1i-C2i) ... (6) S '= 1 / f' = (N-1) (C1i '-C2i) ... (7) Taking the difference between S and S', S-S '= (N-1) (C1i-C1i') ... (8) On the other hand, if the formula (6) is transformed, N −1 = S / (C1i−C2i) (9) Therefore, S−S ′ = S * (C1i−C1i ′) / (C1i−C2i) (10) Therefore, the spherical power S at the reference position and the front side If the three-dimensional surface shape of the subject lens 8 is obtained, the relative frequency distribution at any position can be obtained.

In this embodiment, the curvatures C1i and C2 are
Since there is an inverse relationship between i, C1i ′, C2i ′ and the radius of curvature, the formula of the thin lens is expressed by the curvature.

In the case of Example 1, the refractive index can be obtained from the shape, thickness, and dioptric power of the lens 8 to be tested in one meridian direction (for example, the x direction), and the diopter in the other meridian directions (for example, the y direction) can be determined. , The shape and the thickness in the y direction are obtained by three-dimensional measurement of both surfaces, and therefore can be calculated.
In the case of, the shape of the back surface is unknown, that is, it is unknown whether the lens 8 to be inspected is spherical or toric. Therefore, the shape of the back surface is estimated and calculated from the respective diopters of the two meridians (x, y directions). It is necessary to do
Three or more light sources are required.

(Embodiment 3) In the embodiment described above, the information such as the manufacturer and model name of the lens 8 to be inspected is obtained by accessing the host computer 50 from the spectacle store 70, but this configuration is not always necessary. It is not limited to.
For example, the personal computer 71 of the spectacle store 70 is provided with the above-described function of the host computer 50, and the personal computer 71 is provided with the same information recording / reproducing device 54 'as the information recording / reproducing device 54 as shown in FIG. After connection, information such as the manufacturer and model name of the lens 8 to be inspected may be obtained at the spectacle store 70.

Also in this case, as described above, the spectacle store 70
By operating the personal computer 71 of the spectacle store 70 in consideration of the case where the same manufacturer as the lens 8 to be measured measured in 1 is not handled, or the customer wants a lens of a manufacturer other than the manufacturer, Used to explain to customers by displaying a list of manufacturers and model names that have lenses with data similar to the measured lens 8 to be measured, or displaying a diagram showing the distribution of the refractive power of this list. You can do it.

(Embodiment 4) FIGS. 10 and 10 show a lens meter 30 which can be used in place of the lens meter 60 (71) in FIG.

In FIG. 10, the lens meter 30
Is a measuring device main body 31 and a monitor television (display device (display means)) 3 provided on the front upper part of the measuring device main body 31.
2. Located under the monitor TV 32, the device main body 31
The optical characteristic measuring unit 33 is provided on the front surface of the. 32
a is a display unit of the monitor television 31.

The optical characteristic measuring section 33 is provided with an illumination light source storage section 34 which is projected (bulged) toward the center of the front surface of the measurement apparatus main body 31, and is spaced below the illumination light source storage section 34 of the apparatus main body 31. It has a measurement optical system housing projection 35 which is projected (bulged) to the front, and a frustoconical cylindrical lens receiver 36 which is projected and fixed on the upper surface of the measurement optical system housing projection 35. Further, the optical characteristic measuring section 33 has a frame supporting means 37 used when measuring the optical characteristic of the lens (test lens) of the spectacle frame.

The frame supporting means 37 is a rectangular plate-shaped contact member 38 (see FIG. 11) arranged between the illumination light source section 34 and the measurement optical system housing section 35 as shown in FIG.
And a slider 39 held by the contact member 38 so as to be movable left and right, and a nose pad support member 40 held by the slider 39 so as to be movable up and down and biased upward by a spring (not shown).

The contact member 38 is held in the measuring device main body 31 so as to be able to move forward and backward, and is moved forward and backward by a lever 41 provided on the right side of the measuring device main body 31 in a forward and backward direction. It is supposed to be moved.

The amount of movement of the contact member 38 in the front-rear direction is determined by the linear sensor (linear encoder) shown in FIG.
A longitudinal movement distance measuring means 42 such as a rotary encoder, a magnetic scale, and a potentiometer is provided so as to be able to measure, and a lateral movement amount of the slider 39 is a lateral movement distance measuring means 43 such as a linear sensor (linear encoder), a magnetic scale, and a potentiometer. It is provided so that it can be measured.

The outputs from the measuring means 42 and 43 are input to the arithmetic control circuit 44. The arithmetic control circuit 44 includes a CCD, which is a measurement light receiving section in the measurement optical system housing projection 35.
The output from 35a is input. Further, the arithmetic control circuit 4
4 displays refraction information on the monitor television 32 based on the detection signal from the CCD 35a. Since this configuration is well known, its detailed description is omitted. Also,
The arithmetic control circuit 44 controls the light emission of the illumination light source 34a when the power of the apparatus main body 31 is turned on.

Next, the lens meter 30 having such a configuration
The case of measuring the refractive power (refractive power) of the lens 8 to be inspected of the glasses 45 of FIG.

The nose pad 45a of the glasses 45 is supported by the nose pad support member 40 as shown in FIG. 11, the slider 39 is moved left and right to move the nose pad support member 40 left and right, and the lever 41 is moved back and forth. By moving the contact member 38 back and forth by movably operating it, the glasses 45 can be moved left and right and front and back.

Therefore, first, the nose pad 45a of the spectacles 45 is supported by the nose pad support member 40, and the spectacles 45 are moved together with the nose pad support member 40 in the left / right and front / back directions as described above. One of the lenses to be inspected 8 is placed on the lens receiver 36. After this, the glasses 45 are pushed downward against the upward biasing force of the nose pad support member 40 to bring one of the lenses 8 to be inspected 45 into contact with the lens receiver 36. The nose pad support member 40 and the nose pad support member 40 are moved left and right and front and back to position an arbitrary point Q1 on the side of the one edge 8a of the lens 8 to be measured at the center of the lens receiver 36.

From this position, a measurement start switch (not shown) is turned on, and the lever 41 is rotated to the front side, so that from the point Q1 to the other edge of the lens 8 to be inspected along the line L1 in FIG. 13 (a). Move to point Q2 on the 8b side. Along with this movement, the arithmetic control circuit 44 measures the refractive power of the lens 8 to be inspected for each predetermined movement distance based on the movement distance information signal from the front-back movement distance measuring means 42, and stores this measured value in the memory. 46. Then, after the measurement is completed, the arithmetic control circuit 44 uses the refractive power information stored in the memory 46 to obtain a refraction characteristic curve (addition curve) F1 as shown in FIG.
Is displayed on the monitor TV 32.

Such measurement is performed at a plurality of points, for example, in FIG.
3 (a) is performed on lines L2, L3, etc. from arbitrary points R1, S1 to R2, S2 to obtain refraction characteristic curves F32, F3 in FIGS. 13 (c) and 13 (d). 13 (b) and 13 (d), the ranges f1 and f3 indicated by broken lines of the refraction characteristic curves (addition curves) F1 and F3 are the areas (side unused areas) 19 of FIG. 13 (a). Since it is a portion located at, the smooth value as shown by the broken line cannot be obtained, and therefore it is shown by a broken line to show that it is a portion corresponding to the region 19.

Then, the arithmetic control circuit 44 obtains the refracting power of the distance portion 18 and the near portion of the lens 8 to be inspected from the plurality of refraction characteristic curves (addition curves) F1 to F3. From the boundary on the distance portion 18 side of the lens 8 to be inspected to the near portion 1
Lens refraction characteristics up to 7 and distance portion 18 to near portion 17
It is possible to roughly judge the shape of the bent portion in the middle portion up to.
Therefore, by comparing this data with the lens information data recorded in the information recording / reproducing device 54 of the host computer 50 as in the first embodiment, the maker and model of the lens 8 to be inspected can be obtained as in the first embodiment. It is possible to easily and quickly know the name or the usage type of the lens 8 to be inspected.

The lens meter meter shown in Embodiment 1 is not limited to the one described above, and a lens meter as described below can also be used.

(Embodiment 5) FIG. 14 shows an optical system showing another example of the lens meter. In FIG.
Is a light source including a tungsten lamp, 102 is a collimator lens, 103 is a microlens array, 104 is a lens to be inspected, 105 is a lens receiver, 106 is a relay lens, 107 is a CCD camera, 107a is a CCD camera 7
, 108 is a light receiving sensor of the CCD camera 107. A diaphragm 10 is provided in front of the tungsten lamp 101.
9, a filter 109 ′ is provided, and the tungsten lamp 101, the diaphragm 109, the filter 109 ′, and the collimator lens 102 form 101 light source units.

The filter 109 'transmits light having a wavelength near the e-line and blocks light rays other than the e-line. The luminous flux emitted from the tungsten lamp 101 is collimator lens 10
The parallel light flux is converted by 2 and the microlens array 10
It is led to 3. The microlens array 103 has a large number of microlenses 103a arranged two-dimensionally.
The minute lens 103a may be a spherical lens as shown in FIG. 15A or a Fresnel lens as shown in FIG. 15D, and the outer shape of the minute lens 103a is circular as shown in FIG. The hexagonal shape shown in () and the rectangular shape shown in (c) may be used.

Each microlens 103a has substantially the same focal length, and the number of each microlens 103a is about 100.
The number is 0 and the condensed light flux Pi corresponding to this is generated based on the parallel light flux. The lens 104 to be inspected is located in the vicinity of the rear focus position of the microarray lens 103. Here, the front surface 104a of the lens 104 to be inspected means a surface farther from the eye when worn when it means a spectacle lens. The surface 104b on the back side means a surface on the side close to the eye when worn when the spectacle lens is meant. When manufacturing a spectacle lens, a marking point is formed on the front surface 104a.

The microlens 10 is attached to the lens 104 to be inspected.
A light source image corresponding to 3a is formed. This test lens 1
Each light beam Pi transmitted through 04 is guided to the lens 107a of the CCD camera 107 via the relay lens 106, and CC
An image is formed on the light receiving sensor 108 made of D. The principal ray Ps of the condensed light flux from each microlens 3a which enters the lens 4 to be inspected is parallel to the optical axis O. The principal ray Ps is deflected after passing through the lens 104 to be inspected, and the degree of the deflection depends on the incident height h (the principal ray Ps of the surface 104a of the lens 104 to be inspected).
Incident position) and the lens 104 to be inspected at the incident position
It depends on the frequency and.

The frequency S at each point on the surface 104a (unit:
The diopter is S = tan θ / (10h) (1) where θ is the deflection angle of the principal ray Ps after transmission.

The chief ray Ps based on each minute lens 103a
Is known, and the height on the light receiving sensor 108 is h
i, relay magnification β, surface 10 on the back side of the lens 104 to be tested
When the distance from 4b to the relay lens 106 is Z, there is a relational expression of θ = tan-1 {(h-βhi) / Z} (2), and therefore the unknown height hi on the light receiving sensor 108 is If it is obtained, the deflection angle θ is obtained, and thus the frequency S is finally obtained by the equation (1).

For example, the lens 1 to be measured is attached to the lens receiver 105.
If 04 is not set, the light receiving sensor 108
As shown in FIG. 16A, each minute lens 103a
The respective light spot images 103a 'corresponding to are formed.

Each light spot image 103a shown in FIG.
When the lens 104 to be inspected has a positive spherical power based on the interval d ′ of ′, each light spot image 103a ′ having an interval smaller than the interval d ′ is received as shown in FIG. Formed on the sensor 108. When the lens 104 to be inspected has a negative spherical power, each light spot image 113a 'having an interval larger than the interval d'is formed as shown in FIG. In the case of a lens, as shown in FIG. 15 (a), the overall shape of each light spot image 103a 'formed by the minute lenses 103a arranged at the vertex positions of a square as a whole is as shown in FIG. 16 (d). Distorted into a parallelogram.

When the subject lens 104 is a progressive multifocal lens, each light spot image 103a 'is a mixture of FIG. 16 (b) and FIG. 16 (d) as shown in FIG. 16 (e). When the lens 104 to be inspected is decentered and the lens 104 to be inspected is a prism, the entire shape of the light spot image 103a 'is received as shown in FIG. The test lens 10 is displaced from the center of the sensor 108.
When 4 is a lens having a negative intensity, as shown in FIG. 16G, the intervals between the respective light spot images 103a ′ are widened, and the respective light spot images 103a ′ around the light spot images 103a ′ protrude from the light receiving sensor 8. It will be.

When the power of the lens 104 to be inspected is large, in other words, in the case of the lens 104 to be inspected having a short focal length, the distance (inter-lens distance) d (the distance between the lenses) from the center of each minute lens 103a to the center 15 (a)) to increase the density of the minute lenses 103a per unit area, or to arrange the relay lens 106 close to the lens 104 to be inspected (relay lens 106 is set to the optical axis O). If the arrangement is such that they are movable close to each other and arranged close to each other, it is possible to guide one condensed light beam Pi and the other condensed light beam Pi onto the light receiving sensor 108 without intersecting each other. 16), the condensed light flux of the (n, m) -th minute lens 103a can be reliably made to correspond to the (n, m) -th position of the light receiving sensor 108 shown in FIG. Since the interval d of the gaps 103a is a known value, the incident position (height h) on the front surface 104a of the lens 104 to be measured can be known even if a plurality of light beams are simultaneously incident on the light receiving sensor 108. . That is, the dynamic range is increased by making the relay lens 106 movable along the optical axis O.

(Embodiment 6) FIG. 17 shows an optical system showing still another example of a lens meter. In Embodiment 6 of the present invention, a liquid crystal shutter 110 as a light beam selecting means is provided with a microlens array 103 and a tungsten lamp. 10
1 between the collimator lens 102 and the microlens array 103 in this case. The liquid crystal shutter 10 is, as shown in FIG.
It has a transmission / blocking region 110a that transmits / blocks each light beam emitted from each microlens 103a. The liquid crystal shutter 110 is opened / closed in a predetermined order in a transparent / light-shielding area 110a by a drive circuit (not shown). The area of the transmission / light-shielding area 110a is substantially equal to the area of each microlens 103a. Figure 18
In, the shaded area indicated by reference numeral 110b indicates that the transmission / light shielding area is closed.

When the power of the lens 104 to be inspected is large, if the distance d between the centers of the microlenses 103a (distance between lenses) is reduced and the density of the microlenses 103a per unit area is increased, In some cases, the condensed light flux Pi intersects and is guided to the light receiving sensor 108, and the light flux of the (n, m) th minute lens 103a does not correspond to the (n, m) th position of the light receiving sensor 108. By using this liquid crystal shutter 110, transmission and
The light-blocking area 110a is opened in the direction of the arrow, and the light receiving sensor 1
If the light flux is made incident on 08, the lens 10
4 and the distance Z between the relay lens 106 and the minute lens 1
Even if the distance d between 03a is not changed, the light receiving sensor 108
The position of the upper light flux and the front surface 104a of the lens 104 to be inspected
It is possible to establish a correspondence with the incident position at.

Particularly, the lens 104 to be inspected and the relay lens 1
If the distance Z between the light spot image 103 and the light spot image 06 is reduced, the amount of displacement of the light spot image 103a ′ on the surface of the light receiving sensor 108 per unit frequency is reduced and the measurement accuracy is reduced, but according to the second embodiment of the present invention. For example, even when the power of the lens 104 to be inspected is large, the distance Z between the lens 104 to be inspected and the relay lens 106 is kept large to the extent that the measurement accuracy is not lowered, and the position of the light flux on the light receiving sensor 108 and the inspected light are detected. Correspondence can be established with the incident position on the front surface 104a of the lens 104. Also, the distance d between the minute lenses 103a
When is increased, the light spot image 10 within the measurement range (measurement field of view)
Since the number of 3a 'is reduced, the measurement accuracy is similarly reduced, but according to the second embodiment of the present invention, this can be eliminated.

Transparent / light-shielding area 1 of liquid crystal shutter 110
The opening of 10a can be performed in order as described above, or by the method described below.

For example, as shown in FIG. 19A, the transmission / light-shielding regions 110a are simultaneously opened in a checkered pattern, then the transmission / light-shielding regions 110a are closed, and the shaded regions 110b are formed.
Are simultaneously opened to form an all-optical point image 1 on the light receiving sensor 108.
You may collect 03a '. Further, as shown in FIG. 19B, the interval between the transmission / light-shielding regions 110a may be widened, and the lens 4 to be inspected may be a negative lens having strength shown in FIG. In this case, when the peripheral light spot image 103a 'is protruding from the light receiving sensor 108, as shown in FIG. 19C, the central transmission / shield area 110a is once opened to correspond to this light spot image 103a'. The position of the minute lens 103a to be checked is confirmed, and the measurement may be performed with the position of the minute lens 103a checked as a reference or fully opened or as shown in FIGS. 19 (a) and 19 (b).

Further, when the lens 104 to be inspected is +25 diopters, the transmission / blocking regions 110a are opened at intervals so that the condensed light beams do not intersect, and then, as shown in FIG. It is also possible to tentatively measure more than one transmission / blocking region 110a and change the opening / closing method of the liquid crystal shutter 110 according to the tentatively measured dioptric power of the lens 104 to be tested.

For example, when the lens 104 to be inspected is a strong positive spherical lens, the opening / closing method shown in FIG. 19B is adopted, and the medium positive spherical lens and the weak medium positive spherical lens are used. 19A, the opening / closing method shown in FIG. 19A is adopted, and in the case of a weak positive spherical lens and a negative spherical lens, the entire transmission / blocking area 110a of the liquid crystal shutter 110 is opened at once. In short, it suffices that the incident position of the light beam on the surface 104a of the lens 104 to be inspected and the light beam position on the light receiving sensor 108 can be associated with each other temporally and spatially.

According to the sixth embodiment of the present invention, the liquid crystal shutter 110 is arranged between the microlens array 103 and the collimator lens 102, but between the microlens array 103 and the lens 104 to be inspected. It may be arranged immediately after the microlens 103.

The transparent / blocking area 110a is shown in FIG.
As shown in (II), when four symmetric shapes are opened with the center (corresponding to the optical axis O) as a boundary, it can be used as a normal lens meter.

Example 7 FIG. 20 shows an optical system of a lens meter according to Example 7 of the present invention. In the third embodiment of the present invention, a space between the collimator lens 102 and the lens 104 to be inspected is shown. Two microlens array 10
3, 111 are arranged with a space between each other, and the liquid crystal shutter 110 is provided at the rear focal position of the microlens array 103.
Are arranged. Here, the microlens array 111 has microlenses 111a, each microlens 111a corresponds to each microlens 103a, and the array lens 111 is arranged so that the light source unit and the lens 104 to be tested are conjugated. .

According to the seventh embodiment of the present invention, since the transmission / light-shielding region 110a is provided at the focal point of the light beam,
The area of the transmission / light-shielding region 110a can be made smaller than that in the case of the second embodiment of the invention, so that there is an effect that the transmission / blocking can be switched quickly.

(Embodiment 8) FIG. 21 is shown in FIGS.
The microlens array shown in FIG. 0 is provided with a diaphragm 112, and the diaphragm 112 has each opening 112a corresponding to each microlens 113a. The diaphragm 112 is a light-shielding portion except for each opening 112a. In the case of the optical system shown in FIG. 14, the diaphragm 112 is provided with the microlens array 103 and the collimator lens 10 as shown in FIG.
2 may be provided immediately before the microlens array 103, or as shown in FIG. 21B, between the microlens array 103 and the lens 104 to be inspected immediately after the microlens array 103. Is also good. Also, aperture 1
Reference numeral 12 denotes a liquid crystal shutter 1 in the case of the optical system shown in FIG.
10 or between the microlens array 103,
Alternatively, it is provided immediately after the microlens array 103. Further, in the case of the optical system shown in FIG. 20, it is provided near the microlens array 103 and the microlens array 111. When the microlens array 103 is formed by the photoetching method, the light blocking portion 11 of the diaphragm 112 is formed.
2b (see FIG. 21C) may be directly formed on the microlens array 103 during the photoetching process.

According to this lens meter, it is possible to prevent scattered light from the adjacent microlenses 103a from reaching the light receiving sensor 108 and forming a point image of the light beam on the light receiving sensor 108. That is, it is possible to prevent point images of light rays that do not comply with the image forming conditions of the minute lens 103a from being mixed in the light receiving sensor 108.

(Embodiment 9) FIG. 22 shows an optical system of a lens meter according to Embodiment 9 of the present invention. In Embodiment 5 of the present invention, a plurality of light source parts (for example, 100
The number of LEDs 113 is 0, and each LED 113 is arranged corresponding to the microlens 103a of the microlens array 103.

According to this embodiment, the LEDs 113 can be sequentially turned on to measure the position of the light spot image 103a '. Therefore, even if the liquid crystal shutter 110 is not used, it is possible to measure the positions of the minute spots as in the case where the liquid crystal shutter 110 is provided. A correspondence relationship between the lens 103a and the light spot image 103a 'can be established.
Since the liquid crystal shutter 110 is not used, a light amount loss can be prevented.

(Embodiment 10) FIG. 23A or FIG.
(B) shows the optical system of the lens meter according to the tenth embodiment of the present invention. In the sixth embodiment of the present invention, the number of the microlenses 103a is set to three, and the five lenses near the measurement optical axis are provided.
The light flux is projected in the mm range to determine the average frequency of the measurement optical axis center as in the conventional case.
In (a), the tungsten lamp 101 is provided in the light source section, the light flux emitted through the diaphragm 109 and the filter 110 ′ is emitted as a parallel light flux by the relay lens, and the three light fluxes are inspected by the microlens 103a ′. FIG. 23B shows an example in which the light source unit includes three Ls.
An example in which the ED 113 is made to correspond to each of the three microlenses 103a 'and the test lens 104 is irradiated with three light beams by the microlenses 103a' is shown.

According to this lens meter, the cost of the optical element is significantly lower than that of the conventional lens meter, and the size can be reduced. In the sixth embodiment of the present invention, the light flux transmission range on the lens 104 to be inspected is set to 5 mm or less, but in the case of a contact lens, it is preferably 3 mm or less. The number of the minute lenses 103a is not limited to three and may be four or more.

When the optical characteristics of the lens to be inspected are measured using the lens meters of Examples 5 to 10,
Since the power distribution of each position on the surface of the lens to be inspected can be measured in a short time, when the lens meter of the first embodiment is used to determine which lens information the measured lens to be measured corresponds to The time can be further shortened.

[0112]

As described above, according to the first aspect of the invention, the lens measuring means for measuring and obtaining the distribution of the lens refraction characteristics of the lens to be inspected, the information recording means for recording a lot of lens information, The distribution of the lens refraction characteristics of the lens to be measured measured by the lens measuring means is compared with a large number of pieces of lens information recorded in the information recording means, and the measured lens to be measured corresponds to any lens information. Since the lens determining means for determining whether or not is provided, it is possible to easily and quickly know the lens information.

According to the second aspect of the present invention, the information recording means records lens information corresponding to the lens refraction characteristics, model name, manufacturer, etc., and the lens determining means is the lens measuring means. Since the measured lens to be measured is of which manufacturer and type, it is possible to quickly know the manufacturer, model name, etc. even when the lens needs to be replaced.

Further, the invention of claim 3 has subject information input means for inputting the refraction characteristic or prescription value of the eye to be inspected, and the information recording means has a purpose of using the subject lens corresponding to the refraction characteristic. Information is recorded, and the lens determining unit considers the refractive characteristics of the lens to be measured measured by the measuring unit and the refractive characteristics of the eye to be examined input by the subject information input unit, and the lens to be examined is considered. Since it is configured to determine which purpose the lens is used for, even if the type of glasses currently used is unknown, the type of use can be easily known. In addition, when it is found that the glasses are not suitable for the purpose of use, it is possible to easily prescribe the glasses according to the purpose of use.

The invention according to claim 4 is to use purpose input means for inputting the purpose of use such as indoor use, sports use, driving, etc., and optometry data input means for inputting optometry data such as eye refraction information of the subject's eye. And a lens measuring unit that measures lens information such as a distribution of the refractive power of the eyeglasses, and a comparing unit that compares the optometry data and the lens information to determine whether or not the eyeglasses are suitable for the purpose of use. And the notifying means for notifying the result obtained by the comparing means, it is possible to easily know whether or not the glasses currently used are suitable for the purpose of use.

[Brief description of drawings]

FIG. 1A is a schematic explanatory view of a lens identifying device according to the present invention, FIG. 1B is a circuit diagram showing the connection relationship of FIG. 1A, and FIG.
It is a circuit diagram of the lens meter of (a), (b).

FIG. 2 is a diagram showing an example of an optical system of the lens meter shown in FIG.

FIG. 3 is a schematic diagram showing a modified example of the three-dimensional shape measuring apparatus for a lens meter according to the present invention.

FIG. 4 shows an example of a shape obtained by the three-dimensional shape measuring apparatus according to the present invention, (a) shows an example of the shape of the front side of the lens to be inspected, and (b) shows an example of the shape of the back side of the lens to be inspected. .

FIG. 5 is a plan view showing an example of a spectacle lens as a test lens.

FIG. 6 is a side view of a lens to be inspected.

FIG. 7 is a perspective view showing an example of power measurement by the optical system of the lens meter of Example 2.

8A to 8D are explanatory diagrams showing another example of the distribution of the refractive power of the lens to be inspected.

FIG. 9 is an explanatory diagram showing another control circuit of the lens meter.

FIG. 10 is a perspective view showing another example of a lens meter.

FIG. 11 is a diagram illustrating the use of the lens meter shown in FIG.

12 is an explanatory diagram showing a control circuit of the lens meter shown in FIG.

13A is a refraction characteristic curve diagram along the lines L1 to L3 in FIG. 13A, and FIGS.

FIG. 14 is an explanatory diagram of an optical system showing another example of a lens meter.

FIG. 15 is a plan view for explaining the shape of the microlens array shown in FIG. 14, in which all the lenses are convex lenses;
If the micro lens is a circular spherical convex lens, (b)
Is a hexagonal spherical convex lens,
(C) is a diagram showing a case where the microlens is a rectangular spherical convex lens, and (D) is a diagram showing a case where the microlens is a Fresnel lens.

16 is an explanatory view of a light spot image formed on a light receiving sensor by the optical system shown in FIG. 14, (a) is an explanation view of the light spot image when the lens is not set, and (b) is a covered image. Explanatory drawing of the light spot image when the inspection lens is a positive spherical lens,
(C) is an explanatory view of the light spot image when the lens to be inspected is a negative spherical lens, (D) is an explanatory view of the light spot image when the lens to be inspected is an astigmatism lens, and (E) is Explanatory drawing of the light spot image when the inspection lens is a progressive multifocal lens, (f) is an explanatory view of the light spot image when the subject lens is eccentric, and is a prism, (g) is the subject lens FIG. 3 is an explanatory diagram of a light spot image when is a lens having a negative intensity.

FIG. 17 is an explanatory diagram of an optical system showing another example of a lens meter.

FIG. 18 is a plan view of the liquid crystal shutter shown in FIG.

FIG. 19 is an explanatory diagram of the opening / closing method of the liquid crystal shutter shown in FIG. 17, in which (a) shows a state in which the transmission / blocking region is opened / closed in a checkered pattern, and (b) shows the transmission / blocking region opened / closed at intervals. In the figure, (c) shows a state in which only the central transmission / blocking region is opened / closed, and (d) shows a state in which the four transmission / blocking regions at the central left / right symmetrical positions are opened / closed. is there.

FIG. 20 is an explanatory diagram showing an optical system such as a lens meter.

FIG. 21 shows a microlens array of the lens meter of FIG. 20, (a) shows an example in which a diaphragm is provided immediately in the vicinity of the microlens array, and (b) shows a diaphragm in the vicinity of immediately after the microlens array. An example is shown, and (c) is a diagram showing an example in which a diaphragm is provided in the microlens array itself.

FIG. 22 is an explanatory diagram of an optical system showing another example of a lens meter.

23 is an explanatory diagram of the lens meter shown in FIG. 22,
(A) shows an example in which a tungsten lamp is provided in the light source section, a light beam emitted through a diaphragm and a filter is emitted as a parallel light beam by a relay lens, and three light beams are applied to a lens under test by a minute lens. (B) is a diagram showing an example in which three light fluxes are applied to the test lens by the microlenses in a configuration in which three LEDs are associated with the light source unit and three microlenses, respectively.

[Explanation of symbols]

 8 ... Lens to be inspected (spectacle lens) 30, 60, 71 ... Lens meter (lens measuring means) 51a ... Arithmetic control circuit (lens determining means) 54 ... Information recording / reproducing device 54 (information recording means)

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 22, 1995

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of drawings]

FIG. 1A is a schematic explanatory view of a lens identifying device according to the present invention, FIG. 1B is a circuit diagram showing the connection relationship of FIG. 1A, and FIG.
It is a circuit diagram of the lens meter of (a), (b).

FIG. 2 is a diagram showing an example of an optical system of the lens meter shown in FIG.

FIG. 3 is a schematic diagram showing a modified example of the three-dimensional shape measuring apparatus for a lens meter according to the present invention.

FIG. 4 shows an example of a shape obtained by the three-dimensional shape measuring apparatus according to the present invention, (a) shows an example of the shape of the front side of the lens to be inspected, and (b) shows an example of the shape of the back side of the lens to be inspected. .

FIG. 5 is a plan view showing an example of a spectacle lens as a test lens.

FIG. 6 is a side view of a lens to be inspected.

FIG. 7 is a perspective view showing an example of power measurement by the optical system of the lens meter of Example 2.

8A to 8D are explanatory diagrams showing another example of the distribution of the refractive power of the lens to be inspected.

FIG. 9 is an explanatory diagram showing another control circuit of the lens meter.

FIG. 10 is a perspective view showing another example of a lens meter.

FIG. 11 is a diagram illustrating the use of the lens meter shown in FIG.

12 is an explanatory diagram showing a control circuit of the lens meter shown in FIG.

13 is a refraction characteristic curve diagram of the test lens shown in FIG.

FIG. 14 is an explanatory diagram of an optical system showing another example of a lens meter.

FIG. 15 is a plan view for explaining the shape of the microlens array shown in FIG. 14, in which all the lenses are convex lenses;
If the micro lens is a circular spherical convex lens, (b)
Is a hexagonal spherical convex lens,
(C) is a diagram showing a case where the microlens is a rectangular spherical convex lens, and (D) is a diagram showing a case where the microlens is a Fresnel lens.

16 is an explanatory view of a light spot image formed on a light receiving sensor by the optical system shown in FIG. 14, (a) is an explanation view of the light spot image when the lens is not set, and (b) is a covered image. Explanatory drawing of the light spot image when the inspection lens is a positive spherical lens,
(C) is an explanatory view of the light spot image when the lens to be inspected is a negative spherical lens, (D) is an explanatory view of the light spot image when the lens to be inspected is an astigmatism lens, and (E) is Explanatory drawing of the light spot image when the inspection lens is a progressive multifocal lens, (f) is an explanatory view of the light spot image when the subject lens is eccentric, and is a prism, (g) is the subject lens FIG. 3 is an explanatory diagram of a light spot image when is a lens having a negative intensity.

FIG. 17 is an explanatory diagram of an optical system showing another example of a lens meter.

FIG. 18 is a plan view of the liquid crystal shutter shown in FIG.

FIG. 19 is an explanatory diagram of the opening / closing method of the liquid crystal shutter shown in FIG. 17, in which (a) shows a state in which the transmission / blocking region is opened / closed in a checkered pattern, and (b) shows the transmission / blocking region opened / closed at intervals. In the figure, (c) shows a state in which only the central transmission / blocking region is opened / closed, and (d) shows a state in which the four transmission / blocking regions at the central left / right symmetrical positions are opened / closed. is there.

FIG. 20 is an explanatory diagram showing an optical system such as a lens meter.

FIG. 21 shows a microlens array of the lens meter of FIG. 20, (a) shows an example in which a diaphragm is provided immediately in the vicinity of the microlens array, and (b) shows a diaphragm in the vicinity of immediately after the microlens array. An example is shown, and (c) is a diagram showing an example in which a diaphragm is provided in the microlens array itself.

FIG. 22 is an explanatory diagram of an optical system showing another example of a lens meter.

23 is an explanatory diagram of the lens meter shown in FIG. 22,
(A) shows an example in which a tungsten lamp is provided in the light source section, a light beam emitted through a diaphragm and a filter is emitted as a parallel light beam by a relay lens, and three light beams are applied to a lens under test by a minute lens. (B) is a diagram showing an example in which three light fluxes are applied to the test lens by the microlenses in a configuration in which three LEDs are associated with the light source unit and three microlenses, respectively.

[Explanation of Codes] 8 ... Lens to be inspected (spectacle lens) 30, 60, 71 ... Lens meter (lens measuring means) 51a ... Arithmetic control circuit (lens determining means) 54 ... Information recording / reproducing device 54 (information recording means)

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Yukio Ikezawa 75-1 Hasunumacho, Itabashi-ku, Tokyo Topcon Co., Ltd. (72) Inventor Kenyuki Kato 75-1 Hasunumacho, Itabashi-ku, Tokyo Topcon Co., Ltd. Within

Claims (4)

[Claims] 1. A lens measuring means for obtaining a distribution of lens refraction characteristics of a lens to be measured, an information recording means for recording a lot of lens information, and a lens refraction of the lens to be measured measured by the lens measuring means. A lens determining unit is provided for comparing the distribution of characteristics with a large number of lens information recorded in the information recording unit to determine which lens information the measured lens to be measured corresponds to. Lens identification device. 2. The information recording means includes a lens refraction characteristic,
Lens information corresponding to a model name, a maker, and the like is recorded, and the lens determining means obtains which maker and what kind of the subject lens measured by the lens measuring means. The lens identifying device according to claim 1. 3. A subject information input unit for inputting a refraction characteristic or a prescription value of an eye to be inspected, and the information recording unit records intended use information of the lens to be inspected corresponding to the refraction characteristic. The determining means considers the refraction characteristics of the lens to be measured measured by the measuring means and the refraction characteristics of the eye to be inspected input by the subject information input means, and the lens to be inspected for any purpose The lens identifying device according to claim 1, wherein the lens identifying device determines whether or not 4. A purpose-of-use input means for inputting purpose of use such as indoor, sports, driving, etc., optometry data input means for inputting optometry data such as ocular refraction information of an eye to be inspected, Lens measuring means for measuring lens information such as distribution, comparing means for comparing the optometry data and the lens information, and comparing means for making a comparative judgment as to whether or not the glasses are suitable for the intended purpose, and the comparing means. And a notification means for notifying the obtained result.