JP2021117210A - Spectacle lens information acquisition unit and spectacle lens information acquisition program - Google Patents

Abstract

To provide a spectacle lens measuring device, with which it is possible to appropriately acquire the optical characteristics of a spectacle lens.SOLUTION: Provided is a spectacle lens information acquisition device comprising: optical characteristic acquisition means for acquiring the first optical characteristics of a spectacle lens fitted into a spectacle frame; camber angle acquisition means for acquiring the camber angle of the spectacle frame; correction means for correcting, on the basis of the camber angle of the spectacle frame, the first optical characteristics of the spectacle lens to second optical characteristics, in which the camber angle in the first optical characteristics is canceled; and output means for outputting the second optical characteristics.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a spectacle lens information acquisition device and a spectacle lens information acquisition program for acquiring information on spectacle lenses.

As information on the spectacle lens, a lens meter capable of acquiring the optical characteristics of the spectacle lens is known. For example, there is disclosed a lens meter that reproduces and holds the wearing state of the spectacle frame and acquires the optical characteristics of the spectacle lens framed in the spectacle frame (see Patent Document 1).

Japanese Unexamined Patent Publication No. 7-72038

In the lens meter of Patent Document 1, the refractive power of the spectacle lens framed in the spectacle frame can be obtained by reproducing the wearing state of the spectacle frame. In other words, when the wearer wears the spectacles, the refractive power applied to the wearer's eyes by the spectacle lens framed in the spectacle frame can be known. However, when a lens is formulated based on the refractive power of the spectacle lens obtained by reproducing the wearing state of the spectacle frame, the warp angle of the spectacle frame and the deviation of the optical axis of the spectacle lens have an effect. In some cases, the refractive power applied to the wearer's eyes changed, resulting in an unsuitable formulation.

In view of the above-mentioned prior art, it is a technical subject of the present disclosure to provide a spectacle lens measuring device capable of appropriately acquiring the optical characteristics of a spectacle lens.

In order to solve the above problems, the present disclosure is characterized by having the following configurations.

(1) The spectacle lens information acquisition device according to the first aspect of the present disclosure is a spectacle lens information acquisition device, which includes an optical characteristic acquisition means for acquiring the first optical characteristic of the spectacle lens framed in the spectacle frame. Based on the warp angle acquisition means for acquiring the warp angle of the spectacle frame and the warp angle of the spectacle frame, the first optical characteristic of the spectacle lens is canceled and the warp angle in the first optical characteristic is canceled. 2. It is characterized by including a correction means for correcting the optical characteristics and an output means for outputting the second optical characteristics.

(2) The spectacle lens information acquisition program according to the second aspect of the present disclosure is a spectacle lens information acquisition program used in the spectacle lens information acquisition device, and is executed by the processor of the spectacle lens information acquisition device. Based on the optical characteristic acquisition step for acquiring the first optical characteristic of the spectacle lens framed in the spectacle frame, the warp angle acquisition step for acquiring the warp angle of the spectacle frame, and the warp angle of the spectacle frame, the said The spectacle lens information includes a correction step of correcting the first optical characteristic of the spectacle lens to a second optical characteristic in which the warp angle in the first optical characteristic is canceled, and an output step of outputting the second optical characteristic. It is characterized by having the acquisition device execute it.

It is an external view of the spectacle lens measuring device. It is the schematic of the eyeglass support unit and the lens measurement unit. This is an example of an index pattern that can be displayed on a transmissive display. This is an example of an captured image obtained by displaying the first index pattern on the first transmissive display. This is an example of a captured image obtained by displaying the second index pattern on the second transmissive display. It is a figure which shows the control system of the spectacle lens measuring apparatus. It is a figure explaining the warp angle of a frame. It is a figure explaining the relationship between the optical axis of the measurement optical system, the optical axis of a lens, and the visual axis of a wearer. This is an example of the display screen of the monitor. This is an example of a correction table.

<Overview>
An outline of the spectacle lens information acquisition device according to the embodiment of the present disclosure will be described. The items classified by <> below can be used independently or in relation to each other.

<Means for acquiring optical characteristics>
The spectacle lens information acquisition device in the present embodiment includes optical characteristic acquisition means (for example, control unit 70). The optical characteristic acquisition means acquires the first optical characteristic of the spectacle lens framed in the spectacle frame. For example, the first optical characteristic of the spectacle lens may be the refractive power of the spectacle lens (for example, at least one of spherical power, cylindrical power, astigmatic axis angle, and the like).

The first optical characteristic of the spectacle lens may be the optical characteristic of the spectacle lens after the spectacle lens is framed in the spectacle frame. In other words, the first optical characteristic of the spectacle lens may be the optical characteristic of the spectacle lens in a state of reproducing the wearing state of the spectacles. For example, the optical characteristics of the spectacle lens after the spectacle lens is framed in the spectacle frame (the optical characteristics of the spectacle lens in a state of reproducing the wearing state of the spectacles) are the optical axis of the spectacle lens and the spectacle lens. It may be an optical characteristic acquired in a state where the optical axis of the measured light beam radiated to the eyeglasses is deviated from the optical axis. For example, the optical axis of the spectacle lens may be an axis that passes through the optical center of the spectacle lens and is perpendicular to the lens surface of the spectacle lens.

The optical characteristic acquisition means may acquire the first optical characteristic of the spectacle lens based on the operation signal input by the operator operating the operation means (for example, the monitor 4). Further, the optical characteristic acquisition means may acquire the first optical characteristic of the spectacle lens by using the lens measuring means described later, which can measure the first optical characteristic of the spectacle lens. Further, the optical characteristic acquisition means may acquire the first optical characteristic of the spectacle lens by using a device different from the spectacle lens information acquisition device (for example, a lens meter, etc.). For example, in this case, the optical characteristic acquisition means may acquire the first optical characteristic of the spectacle lens by receiving the first optical characteristic of the spectacle lens from a device different from the spectacle lens information acquisition device.

<Means for acquiring warpage angle>
The spectacle lens information acquisition device in the present embodiment may include a warp angle acquisition means (for example, a control unit 70). The warp angle acquisition means acquires the warp angle of the spectacle frame. For example, the warp angle of the spectacle frame may be expressed as an angle formed by a lens shape formed by the rim of the spectacle frame and a bridge of the spectacle frame when the spectacle frame is observed from above. In other words, when observing the spectacle frame from above, a line segment connecting the center of the bridge of the spectacle frame and the point on the earmost side of the rim, and a line segment extending in the left-right direction from the bridge of the spectacle frame as a base point. May be expressed as the angle formed by.

The warp angle acquisition means may acquire the warp angle of the spectacle frame based on an operation signal input by the operator operating the operation means (for example, the monitor 4). Further, the warp angle acquisition means may acquire the warp angle of the spectacle frame by using a device different from the spectacle lens information acquisition device. For example, in this case, the warp angle acquisition means may acquire the warp angle of the spectacle frame by receiving the warp angle of the spectacle frame from a device different from the spectacle lens information acquisition device. Further, the warp angle acquisition means may acquire the warp angle of the spectacle frame by using the data in which the warp angle of the spectacle frame is accumulated in advance. For example, in this case, the warp angle acquisition means may acquire the warp angle of the spectacle frame by calling the corresponding data from a memory, a server, a cloud, or the like.

<Correction means>
The spectacle lens information acquisition device in the present embodiment may include a correction means (for example, a control unit 70). The correction means corrects the first optical characteristic of the spectacle lens to the second optical characteristic in which the warp angle in the first optical characteristic is canceled, based on the warp angle of the spectacle frame. That is, the correction means corrects the first optical characteristic of the spectacle lens after the frame is placed in the spectacle frame to the second optical characteristic in which the warp angle in the first optical characteristic is canceled, based on the warp angle of the spectacle frame. For example, the second optical characteristic of the spectacle lens may be the refractive power of the spectacle lens (for example, at least one of spherical power, cylindrical power, astigmatic axis angle, and the like).

The second optical characteristic of the spectacle lens may be the optical characteristic of the spectacle lens before the spectacle lens is framed into the spectacle frame. In other words, the second optical characteristic of the spectacle lens may be the original optical characteristic of the spectacle lens in the non-wearing state of the spectacles. For example, the optical characteristics of the spectacle lens (optical characteristics of the spectacle lens in the non-wearing state of the spectacles) before the spectacle lens is framed into the spectacle frame are irradiated to the optical axis of the spectacle lens and the spectacle lens. It may be an optical characteristic acquired in a state where the optical axis of the measured light beam and the optical axis of the measured light beam match (substantially match).

That is, the correction means may correct the first optical characteristic of the spectacle lens after the frame is placed in the spectacle frame to the second optical characteristic before the frame is placed in the spectacle frame based on the warp angle of the spectacle frame. .. In other words, the correction means applies the first optical characteristic of the spectacle lens acquired in a state where the optical axis of the spectacle lens and the optical axis of the measured light beam applied to the spectacle lens are deviated to the warp angle of the spectacle frame. Based on this, the optical axis of the spectacle lens and the optical axis of the measured light beam applied to the spectacle lens may be corrected so as to have the second optical characteristic of the spectacle lens in a state of matching (substantially matching). As a result, even if the warp angle of the spectacle frame affects the first optical characteristics of the spectacle lens in a state where the optical axis of the spectacle lens and the optical axis of the measured light beam applied to the spectacle lens are deviated from each other. It is possible to appropriately acquire the second optical characteristics of the spectacle lens in a state where the respective optical axes are aligned.

The correction means may correct the first optical characteristic of the spectacle lens to the second optical characteristic when the warp angle of the spectacle frame is larger than the predetermined warp angle. In this case, the correction means may correct the first optical characteristic of the spectacle lens to the second optical characteristic based on whether or not the warp angle of the spectacle frame exceeds a predetermined threshold value. For example, the correction means may correct the first optical characteristic of the spectacle lens to the second optical characteristic when the warp angle of the spectacle frame exceeds a predetermined threshold value. Further, for example, when the warp angle of the spectacle frame is equal to or less than a predetermined threshold value, the correction means does not have to correct the first optical characteristic of the spectacle lens to the second optical characteristic. The predetermined threshold value for the warp angle of the spectacle frame may be set in advance from the results of experiments and simulations. For example, when the warp angle of the spectacle frame is at least large, the first optical characteristic of the spectacle lens is corrected to the second optical characteristic so that the original second optical characteristic of the spectacle lens that is not affected by the warp angle of the spectacle frame can be obtained. , Can be obtained properly.

The correction means may correct the first optical characteristic of the spectacle lens to the second optical characteristic by using an arithmetic expression based on the warp angle of the spectacle frame. As an example, the correction means uses a calculation formula based on the warp angle of the spectacle frame, the inclination of the spectacle lens that changes according to the warp angle of the spectacle frame, and the refractive index of the spectacle lens. 1 The optical characteristic may be corrected to the second optical characteristic. The calculation formula based on the warp angle of the spectacle frame may be preset from the results of experiments and simulations.

Further, the correction means may correct the first optical characteristic of the spectacle lens to the second optical characteristic by using a correction table based on the warp angle of the spectacle frame. As an example, the correction means uses a correction table in which the warp angle of the spectacle frame, the first optical characteristic of the spectacle lens, and the second optical characteristic of the spectacle lens are associated with each other, and the first optical characteristic of the spectacle lens is used. May be corrected to the second optical characteristic. The correction table based on the warp angle of the spectacle frame may be preset based on the results of experiments and simulations.

<Output means>
The spectacle lens information acquisition device of the present embodiment includes an output means (for example, a control unit 70). The output means outputs the optical characteristics of the spectacle lens. For example, the output means outputs the optical characteristics of the spectacle lens by display on the display means, output by saving in memory, output by transmission to a server or cloud, output by generation of voice guidance, output by printing to a printer. , Etc. may be output by at least one of them.

For example, the display on the display means by the output means may be the display on the display means (for example, the monitor 4) included in the spectacle lens information acquisition device. Further, for example, the display on the display means by the output means may be a display on the display means provided in a device different from the spectacle lens information acquisition device. Further, for example, the display on the display means by the output means may be the display on the display means of the mobile terminal (for example, a tablet terminal, etc.).

For example, the storage in the memory by the output means may be the storage in the memory provided in the spectacle lens information acquisition device. Further, for example, the storage in the memory by the output means may be the storage in an external memory that can be connected to the spectacle lens information acquisition device. Further, for example, the storage in the memory by the output means may be the storage in the memory provided in a device different from the spectacle lens information acquisition device. Further, for example, the storage in the memory by the output means may be the storage in the memory of the mobile terminal (for example, a tablet terminal, etc.).

The output means may output the second optical characteristic of the spectacle lens. That is, the output means may output the second optical characteristic of the spectacle lens before the frame is placed in the spectacle frame. Thereby, the original second optical characteristic of the spectacle lens, which is not affected by the warp angle of the spectacle frame, can be appropriately acquired.

The output means may output the first optical characteristic of the spectacle lens and the second optical characteristic of the spectacle lens in a comparable manner. That is, the output means may output the first optical characteristics of the spectacle lens after the frame is placed in the spectacle frame and the second optical characteristics of the spectacle lens before the frame is placed in the spectacle frame in a comparable manner.

For example, the output means may be able to compare the first optical characteristic and the second optical characteristic of the spectacle lens by switching between the first optical characteristic of the spectacle lens and the second optical characteristic of the spectacle lens. As an example, the output means causes the display means to display one of the first optical characteristic and the second optical characteristic of the spectacle lens, and based on the operation signal input by the operator operating the operation means. By switching and displaying the other of the first optical characteristic and the second optical characteristic of the spectacle lens, the first optical characteristic and the second optical characteristic of the spectacle lens may be comparable.

Further, for example, the output means may make it possible to compare the first optical characteristic and the second optical characteristic of the spectacle lens by arranging the first optical characteristic of the spectacle lens and the second optical characteristic of the spectacle lens in parallel. good. As an example, the output means may display the first optical characteristic and the second optical characteristic of the spectacle lens in parallel on the display means. In this case, the first optical characteristic and the second optical characteristic of the spectacle lens may be displayed in parallel in the horizontal direction. Further, in this case, the first optical characteristic and the second optical characteristic of the spectacle lens may be displayed in parallel in the vertical direction.

For example, in this way, the output means outputs the first optical characteristic of the spectacle lens and the second optical characteristic of the spectacle lens in a comparable manner, thereby reproducing the wearing state of the spectacle lens. The characteristics and the second optical characteristics of the spectacle lens in the non-wearing state of the spectacles can be easily confirmed and used properly according to the situation.

<Holding means>
The spectacle lens information acquisition device in the present embodiment may include holding means (for example, the spectacle support unit 10). The holding means holds the spectacle frame. The holding means may have a configuration capable of holding the spectacle frame in a predetermined state. For example, the holding means may be a mounting table for mounting the spectacle frame. Further, for example, the holding means may be a pin for supporting the spectacle frame.

The holding means may hold the spectacle frame in a state of reproducing the state of wearing the spectacles by the wearer. That is, the holding means is in a state in which the optical axis of the spectacle lens and the optical axis of the measurement light beam applied to the spectacle lens are deviated from each other when the spectacle frame is arranged at the measurement position in the lens measuring means described later. In addition, the spectacle frame may be held. In this case, the holding means may hold the spectacle frame so that the warp angle of the spectacle frame is the same (substantially the same) as the warp angle in the wearing state of the spectacles. That is, the holding means may hold the spectacle frame in a state where the optical axis of the spectacle lens and the optical axis of the measured luminous flux are deviated by adjusting the warp angle of the spectacle frame to the wearing state. Further, in this case, the holding means may hold the spectacle frame so that the forward tilt angle of the spectacle frame is the same (substantially the same) as the forward tilt angle in the wearing state of the spectacles. That is, the holding means may hold the spectacle frame in a state where the optical axis of the spectacle lens and the optical axis of the measured luminous flux are deviated by adjusting the forward tilt angle of the spectacle frame to the wearing state. Of course, in this case, the holding means may hold the spectacle frame so that the warp angle and the forward tilt angle of the spectacle frame are the same (substantially the same) as the warp angle and the forward tilt angle in the wearing state of the spectacles. That is, the holding means may hold the spectacle frame in a state where the optical axis of the spectacle lens and the optical axis of the measured luminous flux are deviated by adjusting the warp angle and the forward tilt angle of the spectacle frame to the wearing state.

<Lens measuring means>
The spectacle lens information acquisition device in the present embodiment may include a lens measuring means (for example, a measuring optical system 20). The lens measuring means measures the optical characteristics of the spectacle lens by irradiating the spectacle lens with the measured luminous flux from the light source and detecting the measured luminous flux passing through the spectacle lens with a detector. The lens measuring means irradiates the spectacle lens with the measured light beam from the light source, and detects the measured light beam passing through the spectacle lens with a detector to obtain the first optical characteristic of the spectacle lens (frame to the spectacle frame). It may be possible to measure the optical characteristics of the spectacle lens after the insertion (the optical characteristics of the spectacle lens in a state of reproducing the wearing state of the spectacles).

The lens measuring means may be configured to include at least a light source (for example, a display 21), an index plate, and a detector (for example, an image pickup device 27).
The light source irradiates the measured luminous flux toward the spectacle lens. The indicator board has an indicator pattern formed by an array of a plurality of indicators. For example, the index plate may be an index plate that expresses an index pattern by a light projecting unit that transmits the measured luminous flux from the light source and a light-shielding unit that blocks the measured luminous flux from the light source. Further, for example, the index board may be a display (for example, a transmissive display 24) capable of expressing an index pattern by arbitrarily displaying a plurality of indexes. The detector detects the measured luminous flux via the spectacle lens.

Of course, the lens measuring means may be configured to include various optical members in addition to the light source, the index plate, and the detector. As an example, the configuration may include an optical member (for example, a condenser lens 23) for shaping the measured luminous flux from the light source. Further, as an example, the configuration may include an optical path branching member (for example, a half mirror 22) for branching the measured luminous flux from the light source into a plurality of optical paths.

In the present embodiment, the spectacle lens information acquisition device holds the spectacle frame in a state where the holding means reproduces the wearing state of the spectacle frame, and the lens measuring means is the spectacles framed in such a spectacle frame. It may be configured to measure the optical characteristics of the lens. In this case, the warp angle of the spectacle frame affects the optical axis of the spectacle lens and the measurement optical axis of the lens measuring means, so that the first optical characteristic of the spectacle lens in the wearing state of the spectacle lens (to the spectacle frame). (Optical characteristics after frame placement) will be acquired.

However, determining a prescription lens based on the first optical property of the spectacle lens may be inappropriate for the wearer. More specifically, for example, when a prescription lens is framed in a new spectacle frame, the warp angle of the new spectacle frame affects the optical axis of the prescription lens and the visual axis of the wearer. , It may not be as expected.

Therefore, in the configuration in which the optical characteristics of the spectacle lens are measured in the state of reproducing the wearing state of the spectacles, the first optical characteristic of the spectacle lens (to the spectacle frame) in the state of reproducing the wearing state of the spectacles as described above. It is particularly important to correct the optical characteristics of the spectacle lens after the frame is placed to the second optical characteristic of the spectacle lens (optical characteristics of the spectacle lens before the frame is placed in the spectacle frame) in the non-wearing state of the spectacles. Become. For example, by determining the prescription lens based on the second optical characteristic of the spectacle lens, when the prescription lens is framed in a new spectacle frame, the light of the prescription lens is affected even if the warp angle of the new spectacle frame affects it. Since the axis and the visual axis of the wearer match (substantially match), it is possible to follow the assumed appropriate prescription.

The present disclosure is not limited to the apparatus described in the present embodiment. For example, the terminal control software (program) that performs the functions of the above embodiment is supplied to the system or device via a network or various storage media, and the control device (for example, CPU or the like) of the system or device reads the program. It is also possible to do it.

<Example>
In this embodiment, as a spectacle lens information acquisition device for acquiring information about a spectacle lens (hereinafter referred to as a lens), a spectacle lens measuring device (hereinafter referred to as a measuring device) including a lens measuring unit capable of measuring the optical characteristics of the lens. Will be described as an example. In this embodiment, the left-right direction of the measuring device 1 is represented by the X direction, the vertical direction (vertical direction) is represented by the Y direction, and the front-back direction is represented by the Z direction.

FIG. 1 is an external view of the measuring device 1. For example, the measuring device 1 includes a housing 2, a storage unit 3, a monitor 4, and the like.

The housing 2 has a storage unit 3 inside. The spectacle support unit 10, which will be described later, a lens measurement unit, which will be described later, and the like are stored in the storage unit 3. The monitor 4 displays various information (for example, the first optical characteristic of the lens LE, the second optical characteristic of the lens LE, and the like). The monitor 4 is a touch panel. That is, the monitor 4 also functions as an operation unit, and is used when the operator makes various settings (for example, start of measurement, etc.). The signal corresponding to the operation instruction input from the monitor 4 by the operator is output to the control unit 70 described later.

FIG. 2 is a schematic view of the eyeglass support unit 10 and the lens measurement unit.

<Support unit>
The spectacle support unit 10 is used for mounting the spectacle F. For example, the spectacle support unit 10 includes a positioning pin 11, a front support portion 12, a rear support portion 13, and the like.

The positioning pin 11 comes into contact with the rear surface of the lens LE in the spectacles F. The positioning pin 11 keeps the positional relationship between the lens LE and the transmissive display 24 described later constant. Further, the positioning pin 11 keeps the positional relationship between the lens LE and the image pickup device 27, which will be described later, constant.

The front support portion 12 supports a portion in front of the center of the spectacles F in the direction in which the temple FT of the frame extends. For example, the front support portion 12 supports the bridge FB of the frame. The front support portion 12 is not limited to this embodiment, and may support the rim of the frame as an example. The rear support portion 13 supports a portion rear of the center of the spectacles F in the direction in which the temple FT of the frame extends. For example, the rear support portion 13 supports the temple FT of the frame. The rear support portion 13 is not limited to this embodiment, and may support the modern FM of the frame as an example. For example, in this embodiment, the spectacles F are placed on the front support portion 12 and the rear support portion 13 with the upper end of the rim of the frame facing upward and the lower end of the rim of the frame facing downward.

The front support portion 12 and the rear support portion 13 may be movably arranged on the base 5. For example, the front support portion 12 may be arranged so as to be movable in the vertical direction (Y direction) by a drive mechanism (not shown). Further, for example, the rear support portion 13 may be arranged so as to be movable in the vertical direction (Y direction) by a drive mechanism (not shown). For example, by moving at least one of the front support portion 12 and the rear support portion 13 in the vertical direction, the forward tilt angle of the frame in the spectacles F can be adjusted. For example, the rear surface of the lens LE in the spectacles F and the bottom surface of the positioning pin 11 can be made parallel (substantially parallel). Further, for example, the angle formed by the optical axis N1 (described later) of the measurement optical system 20 and the lens LE when the spectacles F is viewed from the side is the angle formed by the general human line-of-sight direction and the lens LE. For example, it can be adjusted to 90 degrees). Further, for example, the angle in the vertical plane between the optical axis N2 (described later) of the lens LE and the horizontal visual axis of the wearer can be adjusted to the wearing state of the spectacles F. By moving the front support portion 12 and the rear support portion 13 to reproduce the wearing state of the spectacles F, it is possible to accurately obtain the optical characteristics of the lens LE close to that when the spectacles F is worn by the wearer.

<Lens measurement unit>
The lens measuring unit is used to measure the optical characteristics of the lens LE framed in the spectacle F. For example, the lens measuring unit includes a measuring optical system 20. For example, the measurement optical system 20 includes a display 21, a condenser lens 23, a transmissive display 24, an image pickup device 27, and the like.

The display 21 irradiates the measured luminous flux toward the lens LE of the spectacles F. For example, by turning on the backlight of the display 21 and hiding the display 21, the lens LE is illuminated by the measured luminous flux from the display 21.

The condenser lens 23 collects the measured luminous flux refracted parallel to (substantially parallel to) the optical axis N1 among the measured luminous flux radiated from the display 21 toward the lens LE.

The transmissive display 24 is a display having a high transmittance capable of transmitting the measured luminous flux from the display 21. The transmissive display 24 can display the index pattern 30 described later. For example, by displaying the index pattern 30 on the transmissive display 24, the measured luminous flux from the display 21 is transmitted through the transmissive display 24 to be formed in the shape of the index pattern 30, whereby the index pattern 30 is projected onto the lens LE. NS. For example, if the transmissive display 24 is hidden, the measured luminous flux from the display 21 is not formed in the shape of the index pattern 30 because it passes through the transmissive display 24, and the index pattern 30 is not projected on the lens LE.

In this embodiment, as the transmissive display 24, a first transmissive display 24a and a second transmissive display 24b are provided. The first transmissive display 24a and the second transmissive display 24b are arranged so that their vertical centers and left and right centers coincide with the optical axis L1. Further, the first transmissive display 24a and the second transmissive display 24b are arranged with a predetermined distance ΔD in the optical axis N1 direction.

The image sensor 27 is irradiated from the display 21 and captures the measured luminous flux via the transmissive display 24 (first transmissive display 24a and second transmissive display 24b) lens LE. The focus of the image sensor 27 is focused on the vicinity of the front surface of the lens LE. Therefore, for example, the index pattern 30 projected on the lens LE, the hidden mark formed on the lens LE, and the like are imaged in a substantially focused state.

For example, the measured light beam from the display 21 passes through the transmissive display 24 (the first transmissive display 24a and the second transmissive display 24b), and is converged or diverged by the refractive force of the lens LE, but the optical axis N1 Only the measured light beam refracted parallel to (substantially parallel to) the light beam is focused on the image pickup element 27 by the condenser lens 23. The image sensor 27 images the measured luminous flux passing through each member.

<Indicator pattern>
FIG. 3 is an example of the index pattern 30 that can be displayed on the transmissive display 24. Here, the first index pattern 30a that can be displayed on the first transmissive display 24a will be taken as an example. Since the second index pattern 30b that can be displayed on the second transmissive display 24b has the same configuration as the following, the description thereof will be omitted.

The first transmissive display 24a can display the index 31 on the screen. The index 31 includes a peripheral index 31a and a reference index 31b.

For example, the peripheral index 31a is provided in advance around the reference index 31b with a predetermined shape, a predetermined position, a predetermined number, and the like. In this embodiment, the peripheral index 31a is formed in a circular shape. Further, in the present embodiment, the peripheral index 31a is arranged in each of the right region 33a on the side where the left lens LEl is arranged and the left region 33b on the side where the right lens LEr is arranged. The peripheral index 31a is arranged in each of the right region 33a and the left region 33b so as to be symmetrical with respect to the vertical (Y direction) axis passing through the passing position I of the optical axis L1. Further, in this embodiment, a large number of peripheral indexes 31a are arranged.

For example, the reference index 31b may be distinguished from the peripheral index 31a, and is provided in advance with a predetermined shape, a predetermined position, a predetermined number, and the like. In this embodiment, the reference index 31b is formed in a circular shape larger than the peripheral index 31a. Further, in the present embodiment, the reference index 31b is symmetrical with respect to the vertical (Y direction) axis passing through the passing position I of the optical axis L1 in the right region 33a and the left region 33b, respectively. Be placed. Further, in this embodiment, four reference indexes 31b are arranged. For example, the reference index 31b makes it easier to identify the positional relationship of each peripheral index 31a.

For example, the first index pattern 30a of the first transmissive display 24a is formed by the arrangement of such indexes 31. Similarly, for example, the second index pattern 30b of the second transmissive display 24b is formed by the arrangement of such indexes 31.

In this embodiment, the first index pattern 30a of the first transmissive display 24a and the second index pattern 30b of the second transmissive display 24b are configured to have the same pattern. That is, the shape of the index 31 in the first index pattern 30a and the shape of the index 31 in the second index pattern 30b are configured to be the same. Further, the position of the index 31 in the first index pattern 30a and the position of the index 31 in the second index pattern 30b are configured to be the same. Further, the number of indexes 31 in the first index pattern 30a and the number of indexes 31 in the second index pattern 30b are configured to be the same.

<Index pattern image>
For example, when the measured luminous flux from the display 21 is imaged by the image pickup device 27, an electric signal is processed by the control unit 70 described later, and an image pickup image is obtained.

FIG. 4 is an example of an captured image obtained by displaying the first index pattern 30a on the first transmissive display 24a. FIG. 4A shows a state in which the spectacles F are not placed on the spectacle support unit 10. FIG. 4B shows a state in which the spectacles F are placed on the spectacle support unit 10. FIG. 5 is an example of an captured image obtained by displaying the second index pattern 30b on the second transmissive display 24b. FIG. 5A shows a state in which the spectacles F are not placed on the spectacle support unit 10. FIG. 5B shows a state in which the spectacles F are placed on the spectacle support unit 10.

In addition, in FIG. 4 and FIG. 5, the case where the lens LE framed in the spectacles F is a minus lens is taken as an example, and the captured image for the right lens LEr is illustrated. Further, in FIGS. 4 and 5, for convenience, the shape of the first index pattern 30a and the shape of the second index pattern 30 are shown as different shapes.

First, a reference state in which the spectacles F are not placed on the spectacle support unit 10 will be described. When the first index pattern 30a is displayed on the first transmissive display 24a in the reference state, the measured luminous flux from the display 21 is formed in the shape of the first index pattern 30a. Therefore, as shown in FIG. 4A, the reference image B1 including the image of the first index pattern 30a (hereinafter, the first index pattern image 41) is acquired as the captured image. Further, when the second index pattern 30b is displayed on the second transmissive display 24b in the reference state, the measured luminous flux from the display 21 is formed in the shape of the second index pattern 30b. Therefore, as shown in FIG. 5A, the reference image B2 including the image of the second index pattern 30b (hereinafter referred to as the second index pattern image 51) is acquired as the captured image.

The positions and numbers of the plurality of indexes 31 in the first index pattern 30a and the positions and numbers of the plurality of indexes 31 in the second index pattern 30b are the same. Therefore, in the reference state, the pixel position of each index image in the reference image B1 and the pixel position of each index image in the reference image B2 are the same position. As an example, in the first index pattern image 41, the pixel position of the point P1 corresponding to the fourth index image from the left and the third index image from the top, and in the second index pattern image 51, the fourth and fourth from the left. The pixel position of the point P2 corresponding to the third index image from the top is the same position.

Next, the measurement state in which the spectacles F are placed on the spectacle support unit 10 will be described. When the first index pattern 30a is displayed on the first transmissive display 24a in the measurement state, the measured luminous flux from the display 21 is formed in the shape of the first index pattern 30a, and the measured luminous flux from the display 21 is refracted by the lens LE. It is refracted by force and diverges. Therefore, as shown in FIG. 4B, as the captured image, at least a part of the first index pattern image 41 reduced to a circular shape from the reference state and an image of the right lens LEr (hereinafter, right lens). The measurement image M1 including the image 60) is acquired. Further, when the second index pattern 30b is displayed on the second transmissive display 24b in the measurement state, the measured luminous flux from the display 21 is formed in the shape of the second index pattern 30b, and the measured luminous flux from the display 21 is the lens LE. It is refracted by the refractive power of and diverges. Therefore, as shown in FIG. 5B, the captured image is a measurement image including at least a part of the second index pattern image 51 reduced to a circular shape from the reference state and the right lens image 60. M2 is acquired.

In this embodiment, each transmissive display is arranged so that the distance from the lens LE to the second transmissive display 24b is farther than the distance from the lens LE to the first transmissive display 24a. .. Therefore, in the measurement state, the second index pattern image 51 in the measurement image M2 appears as a smaller image than the first index pattern image 41 in the measurement image M1, and the pixel positions of the respective index images in the measurement image M1 and the pixel positions. The pixel positions of the respective index images in the measurement image M2 are different positions. As an example, in the first index pattern image 41, the pixel position of the point P1'corresponding to the fourth index image from the left and the third index image from the top, and in the second index pattern image 51, the fourth from the left. Moreover, the pixel position of the point P2'corresponding to the third index image from the top is different from the pixel position.

For example, in the above, the lens LE of the spectacle F is a minus lens, but if the lens LE is a plus lens, the measured light beam from the display 21 is refracted by the refractive power of the lens LE and converges. Therefore, in the measurement state, the first index pattern image 41 and the second index pattern image 51, which are at least partially enlarged in a circular shape from the reference state, are acquired. The second index pattern image 51 in the measurement image M2 appears as a larger image than the first index pattern image 41 in the measurement image M1. Further, if the lens LE is an astigmatism lens, the first index pattern image 41 and the second index pattern image 51 in which at least a part of the lens LE has changed to an elliptical shape from the reference state are acquired. If the lens LE is a progressive lens, the first index pattern image 41 and the second index pattern image 51 that change according to the refractive power of the progressive band are acquired.

<Control unit>
FIG. 6 is a diagram showing a control system of the measuring device 1. For example, a monitor 4, a display 21, a first transmissive display 24a, a second transmissive display 24b, an image sensor 27, a non-volatile memory 75 (hereinafter, memory 75), and the like are electrically connected to the control unit 70. ing.

For example, the control unit 70 is realized by a general CPU (processor), RAM, ROM, or the like. For example, the CPU controls the driving of each part in the measuring device 1. For example, RAM temporarily stores various types of information. For example, the ROM stores various programs executed by the CPU. The control unit 70 may be composed of a plurality of control units (that is, a plurality of processors).

The memory 75 may be a non-transient storage medium capable of retaining the storage contents even when the power supply is cut off. For example, as the memory 75, a hard disk drive, a flash ROM, a USB memory, or the like can be used. For example, the memory 75 stores the reference image B1 and the reference image B2 in the reference state, the measurement images M1 and M2 in the measurement state, and the like.

<Control operation>
The control operation of the measuring device 1 will be described.

The operator receives the spectacles F of the wearer and measures the warp angle θ of the spectacle frame (hereinafter, frame) and the refractive index n of the lens LE, respectively.

<Acquisition of the warp angle of the frame>
FIG. 7 is a diagram for explaining the warp angle θ of the frame. The operator measures the warp angle θ of the frame using a protractor, a chart on which an angle scale is drawn, and the like. For example, the warp angle θ of the frame is expressed as the angle formed by the horizontal line H and the line segment K. The horizontal line H is a horizontal line extending in the left-right direction from the center point C of the bridge FB in the frame. The line segment K is a line segment connecting the center point C of the bridge FB in the frame and the point E on the earmost side in the rim of the frame.

The operator operates the monitor 4 to input the warp angle θ of the frame on an input screen (not shown). The control unit 70 acquires the warp angle θ of the frame based on the input signal from the monitor 4, and stores the warp angle θ of the frame in the memory 75.

<Acquisition of refractive index of lens>
The operator measures the refractive index n of the lens LE by using the refractive index measuring device. For example, the refractive index n of the lens LE is a value used as an index indicating the thickness of the lens. For example, the larger the refractive index n of the lens, the thinner the lens, and the smaller the refractive index n of the lens, the thicker the lens.

The operator operates the monitor 4 to input the refractive index n of the lens LE on an input screen (not shown). The control unit 70 acquires the refractive index n of the lens LE based on the input signal from the monitor 4, and stores the refractive index n of the lens LE in the memory 75.

<Acquisition of the first optical characteristic of the lens>
The operator places the spectacles F on the spectacle support unit 10 and moves at least one of the front support portion 12, the rear support portion 13, and the positioning pin 11 to align the spectacles F with the measurement optical system 20. To complete.

The operator operates the monitor 4 to select a measurement button for measuring the first optical characteristic of the lens LE. The control unit 70 displays the first transmissive display 24a and the second transmissive display 24b in response to the input signal from the monitor 4, and projects the first index pattern 30a and the second index pattern 30b onto the lens LE. Thereby, the first optical characteristic of the lens LE is measured. As an example, the control unit 70 measures at least one of the spherical power, the cylindrical power, the astigmatic axis angle, and the like of the lens LE.

The control unit 70 turns on the display 21. Further, the control unit 70 causes the first transmissive display 24a to display a predetermined first index pattern 30a. The second transmissive display 24b is hidden, and the predetermined second index pattern 30b is not displayed. When the measured light beam from the display 21 passes through the second transmissive display 24b, passes through the first transmissive display 24a, and is formed in the shape of the first index pattern 30a, the left lens LEl and the right lens LEr each. It is refracted, condensed by the condenser lens 23, and reaches the image pickup element 27. The control unit 70 acquires the measurement image M1 including the first index pattern image 41, the left lens image, and the right lens image 60 based on the image pickup result of the image pickup device 27. Further, the control unit 70 stores the measurement image M1 in the memory 75.

Subsequently, the control unit 70 hides the first transmissive display 24a and causes the second transmissive display 24b to display a predetermined second index pattern 30b. The measured light beam from the display 21 passes through the second transmissive display 24b and is formed in the shape of a second index pattern 30b, and when it passes through the first transmissive display 24a, it is refracted by each of the left lens LEl and the right lens LEr. , The light is collected by the condenser lens 23 and reaches the image pickup element 27. The control unit 70 acquires the measurement image M2 including the second index pattern image 51, the left lens image, and the right lens image 60 based on the image pickup result of the image pickup device 27. Further, the control unit 70 stores the measurement image M2 in the memory 75.

The control unit 70 measures the optical characteristics of the left lens LEl and the right lens LEr by using the position information of the passing position where the measured luminous flux from the display 21 has passed two points in the optical axis direction. The control unit 70 detects where in the measurement image M1 the index image of the reference image B1 in the reference state in which the spectacles F is not mounted has moved to the measurement state with the spectacles F mounted. do. For example, the control unit 70 detects the pixel position of each index image constituting the first index pattern image 41 with respect to the measurement image M1 and compares it with the pixel position of each index image in the reference image B1. As a result, the position information of the passing position where the measured luminous flux from the display 21 passes through the first transmissive display 24a arranged at a predetermined position in the optical axis direction is acquired.

Similarly, the control unit 70 detects where in the measurement image M2 the index image of the reference image B2 has moved. For example, the control unit 70 detects the pixel position of each index image constituting the second index pattern image 51 with respect to the measurement image M2, and compares it with the pixel position of each index image in the reference image B2. As a result, the position information of the passing position where the measured luminous flux from the display 21 passes through the second transmissive display 24b arranged at a predetermined position in the optical axis direction is acquired.

In the control unit 70, the measured light beam from the display 21 is refracted by the lens LE based on the position information of the passing position where the measured light beam from the display 21 has passed through the first transmissive display 24a and the second transmissive display 24b. Calculate the refraction angle. Further, the control unit 70 determines the refraction angle at which the measured luminous flux from the display 21 is refracted by the lens LE, and the amount of change in the interval between the index images 41 forming the first index pattern image 41 and the second index pattern image 51. , The first optical characteristics of each of the left lens LEl and the right lens LEr are calculated. The control unit 70 acquires the first optical characteristic in this way and stores it in the memory 75.

<Acquisition of the second optical characteristic of the lens>
FIG. 8 is a diagram illustrating the relationship between the optical axis N1 of the measurement optical system 20, the optical axis N2 of the lens LE, and the visual axis N3 of the wearer. For example, the optical axis N1 of the measurement optical system 20 may pass through the center point C of the bridge FB in the frame. For example, the optical axis N2 of the lens LE passes through the optical center O of the lens LE and is represented as an axis perpendicular to the lens surface of the lens LE. For example, the visual axis N3 of the wearer passes through the optical center O of the lens LE and is represented as an axis parallel (substantially parallel) to the optical axis N1.

The first optical characteristic of the lens LE measured by placing the spectacle F on the spectacle support unit 10 is the first optical characteristic of the lens LE in the wearing state, which reflects the warp angle θ of the frame. In other words, it is the first optical characteristic of the lens LE measured in a state where the optical axis N1 of the measurement optical system 20 (the visual axis N3 of the wearer) and the optical axis N2 of the lens LE are displaced from each other. However, for example, if a prescription lens for correcting the wearer's eyes is selected based on the first optical characteristic of the lens LE in such a wearing state, the prescription may not be suitable for the wearer.

As an example, the spectacles F currently worn by the wearer have the same warp angle θ of the frame, and the spherical power of the lens LE (in other words, the spherical power of the lens LE before being framed) is the same. An example is given when a new pair of eyeglasses F'is manufactured. Here, the warp angle θ of the frame is 20 degrees, and the spherical power of the lens LE before being framed is −5.0D. The cylindrical power of the lens LE before being framed is 0D, and the astigmatic axis angle of the lens LE before being framed is 0 degrees.

The lens LE framed in the spectacles F is measured because the warp angle of the frame affects the optical axis N1 (wearer's visual axis N3) of the measurement optical system 20 and the optical axis N2 of the lens LE. The first spherical power is acquired as −5.2D by the optical system 20. That is, the first spherical power of the lens LE after being framed is acquired as −5.2D. When the operator selects and processes a prescription lens (first spherical power-5.2D) based on the acquisition result and frames the prescription lens in the frame of the new eyeglasses F', the wearer's eye warps the frame. Due to the influence of the angle, the visual axis N3 of the wearer and the optical axis N2 of the lens LE are displaced, so that the spherical power is actually corrected at -5.4D.

The wearer newly created the eye from the state in which the eye was actually corrected at the spherical power of -5.2D by the lens LE (spherical power-5.0D) framed in the spectacles F currently worn. The prescription lens (spherical power -5.2D) framed in the spectacles F'sets the eye into a state in which the eye is actually corrected at the spherical power -5.4D. For this reason, the wearer may feel uncomfortable with the appearance of the newly produced eyeglasses F'.

The optical characteristics of the lens LE before being framed (in other words, the optical characteristics of the lens LE in the non-wearing state) and the first optical characteristics of the lens LE after being framed (in other words, the wearing state of the lens LE) are reproduced. (Optical characteristics), the larger the value of the warp angle θ of the frame, the larger the difference. Further, the larger the absolute value of the optical characteristics before the frame of the lens LE and the first optical characteristics after the frame of the lens LE is, the larger the difference is. Become. As an example, the larger the absolute value of the refractive power (spherical power, cylindrical power, astigmatic axis angle, etc.) before framed in the lens LE, the more the refractive power before framed in the lens LE and the frame of the lens LE. The difference between the refractive power after insertion and the refractive power becomes large.

Therefore, in this embodiment, the first optical characteristic after the frame of the lens LE is corrected, and the second optical characteristic before the frame of the lens LE, in which the influence of the warp angle θ of the frame is canceled, is acquired. More specifically, the first optical characteristic of the lens LE is corrected based on the warp angle θ of the frame so that the optical axis N1 of the measurement optical system 20 and the optical axis N2 of the lens LE match (substantially match). By doing so, the second optical characteristic of the lens LE in which the influence of the warp angle θ of the frame is canceled is acquired. Hereinafter, acquisition of the second optical characteristic by correcting the first optical characteristic in the lens LE will be described in detail.

The control unit 70 calculates the angle α formed by the optical axis N1 of the measurement optical system 20 and the optical axis N2 of the lens LE based on the warp angle θ of the frame acquired as described above. In other words, the deviation angle α between the optical axis N1 of the measurement optical system 20 and the optical axis N2 of the lens LE is calculated. For example, the optical axis N2 of the lens LE can be regarded as coincident (substantially coincident) with the perpendicular line Q with respect to the line segment K connecting the center point C of the bridge FB in the frame and the point E on the ear side of the rim. Therefore, for example, the control unit 70 obtains the perpendicular line Q with respect to the line segment K, and further obtains the angle formed by the perpendicular line Q and the optical axis N1, so that the angle α (deviation) formed by the optical axis N1 and the optical axis N2 is obtained. Calculate the angle α).

Subsequently, the control unit 70 determines the first optical characteristic of the lens LE after the frame is set, based on the angle α formed by the optical axis N1 and the optical axis N2 and the refractive index n of the lens LE. Correct to the second optical characteristic before frame placement. For example, the control unit 70 sets the first spherical power S1 of the lens LE to the second spherical power S2 of the lens LE based on the angle α formed by the optical axis N1 and the optical axis N2 and the refractive index n of the lens LE. Correct to. For example, the second spherical power S2 of the lens LE can be calculated by the following mathematical formula.

If the value obtained by multiplying the first spherical power S1 of the lens LE and the first cylindrical power C1 of the lens LE (the first cylindrical power after the frame of the lens LE) is 0 or more, the equation 1 is used. You may. Further, if the value obtained by multiplying the first spherical power S1 of the lens LE and the first cylindrical power C1 of the lens LE is less than 0, the equation 2 may be used.

For example, for the spectacles F currently worn by the wearer, the warp angle θ of the frame is 20 degrees, the refractive index n of the lens LE is 1.67, and the first spherical power S1 after the lens LE is framed is −5. If it is 2D, the second spherical power S2 before the frame of the lens LE is calculated to be −5.0D.

The control unit 70 calculates the second optical characteristic (second spherical power S2) before the frame of the lens LE, in which the influence of the warp angle θ of the frame is canceled. Further, the control unit 70 acquires the second optical characteristic (second spherical power S2) before the frame of the lens LE and stores it in the memory 75.

<Display of the first optical characteristics and the second optical characteristics of the lens>
FIG. 9 is an example of the display screen of the monitor 4. The control unit 70 has a first optical characteristic after the lens LE is framed (an optical characteristic that reproduces the wearing state of the lens LE) and a second optical characteristic before the lens LE is framed (optical in the non-wearing state of the lens LE). (Characteristics) and are displayed on the monitor 4. For example, the control unit 70 displays in parallel a first image 90 showing the first optical characteristics after the lens LE is framed and a second image 91 showing the second optical characteristics before the lens LE is framed. You may. Further, for example, the control unit 70 may display a third image 93 showing the warp angle of the frame.

The operator can properly use these optical characteristics depending on the situation by comparing the first optical characteristics after the frame of the lens LE with the second optical characteristics before the frame of the lens LE. For example, the operator may check the first optical characteristic of the lens LE and determine whether or not the wearer's eyes are overcorrected due to the influence of the warp angle θ of the frame. Further, for example, the operator may select a prescription lens for correcting the wearer's eye based on the second optical characteristic of the lens LE.

Similar to the above example, the spectacles F currently worn by the wearer have the same warp angle θ of the frame, and the spherical power S of the lens LE (in other words, the spherical surface before the frame of the lens LE). An example is given when a new pair of eyeglasses F'with the same power S) is manufactured. The warp angle θ of the frame is 20 degrees, the spherical power of the lens LE before frame is -5.0D, the cylindrical power of the lens LE before frame is 0D, and the astigmatic axis angle of the lens LE before frame is 0 degrees. Is.

In the lens LE framed in the spectacles F, the first spherical power S1 after the frame is acquired as −5.2D due to the influence of the warp angle of the frame. However, by correcting the first spherical power S1 after the frame of the lens LE so as to cancel the influence of the warp angle of the frame, the second spherical power S2 before the frame of the lens LE becomes -5.0D. It is calculated. When the operator selects and processes a prescription lens based on the second spherical power (second spherical power-5.0D) and frames the prescription lens in the frame of the new spectacles F', the wearer's eye is framed. Due to the influence of the warp angle of the lens, the visual axis N3 of the wearer and the optical axis N2 of the lens LE are displaced, so that the spherical power is actually corrected at -5.2D.

The wearer newly created the eye from the state in which the eye was actually corrected at the spherical power of -5.2D by the lens LE (spherical power-5.0D) framed in the spectacles F currently worn. The prescription lens (spherical power-5.0D) framed in the spectacles F'makes the eye actually corrected at spherical power -5.2D. Since the appearance of the currently worn spectacles F and the appearance of the newly produced spectacles F'are the same, it is possible to obtain a comfortable prescription suitable for the eyes of the wearer.

As described above, for example, the spectacle lens information acquisition device in the present embodiment has the first optical characteristic of the lens framed in the frame based on the warp angle of the frame, and the lens in which the warp angle of the frame is cancelled. The second optical characteristic of the lens is corrected to the second optical characteristic of the lens, and the second optical characteristic of the lens is output. That is, based on the warp angle of the frame, the first optical characteristic of the lens after being framed into the frame is corrected to the second optical characteristic of the lens before being framed into the frame, which cancels the warp angle of the frame. Outputs the second optical characteristic of the lens. As a result, the operator can appropriately acquire the original optical characteristics of the lens that are not affected by the warp angle of the frame.

Further, for example, the spectacle lens information acquisition device in the present embodiment outputs the first optical characteristic of the lens after the frame is framed and the second optical characteristic of the lens before the frame is framed in the frame in a comparable manner. do. As a result, the operator can easily confirm the optical characteristics of the lenses in the worn state and the non-weared state of the spectacles, and can use them properly according to the situation. As an example, the lens worn by the wearer using the first optical characteristic of the lens after being framed into the frame (the first optical characteristic of the lens in the wearing state of the spectacles) is suitable for the wearer. You can check if there is one. Further, as an example, the prescription lens to be prescribed to the wearer can be determined by using the second optical characteristic of the lens (the original second optical characteristic of the lens in the non-wearing state of the spectacles) before the frame is placed in the frame. ..

Further, for example, the spectacle lens information acquisition device in the present embodiment obtains optical characteristics in a state where the optical axis of the lens and the optical axis of the measured light beam applied to the lens coincide with each other based on the warp angle of the frame. As obtained, the first optical characteristic of the lens after being framed in the frame is corrected to the second optical characteristic of the lens before being framed in the frame. As a result, even if the first optical characteristic of the lens is acquired in a state where the optical axis of the lens and the optical axis of the measured luminous flux applied to the lens are deviated due to the influence of the warp angle of the frame, the respective optical axes match. The second optical characteristic of the lens in this state can be appropriately acquired.

Further, for example, the spectacle lens information acquisition device in the present embodiment holds the frame, irradiates the measured luminous flux from the light source toward the lens framed in the frame, and detects the measured luminous flux through the lens with a detector. By detecting, the first optical characteristic of the lens after being framed into the frame is measured. For example, in a configuration in which the frame is held in a state of reproducing the wearing state, the warp angle of the frame affects the optical axis of the lens and the measurement optical axis, and the first optical of the lens in the wearing state of the spectacles occurs. The characteristics are acquired. However, determining a prescription lens based on the first optical property of the lens can be inappropriate for the wearer. For this reason, it is important to correct the first optical characteristic of the lens to the original second optical characteristic of the lens in the non-wearing state of the spectacles, particularly in a configuration in which the frame is held in a state of reproducing the wearing state. It becomes. The operator can make a prescription suitable for the wearer by determining the prescription lens based on the second optical characteristic of the lens.

<Example of transformation>
In this embodiment, the case where the operator measures the warp angle θ of the frame using a protractor, a chart on which an angle scale is drawn, or the like is described as an example, but the present invention is not limited to this. In this embodiment, it suffices if the warp angle θ of the frame can be acquired, and the operator may manually measure and input the warp angle θ, or the control unit 70 automatically acquires the warp angle θ. May be. For example, in the case of manual operation, an angle scale may be provided in advance on the mounting surface of the eyeglasses F (base 5 in this embodiment) in the eyeglass support unit 10 by printing or the like. The operator may place the spectacles F on the spectacle support unit 10 and measure the warp angle θ using the angle scale of the base 5. Further, for example, in the case of automatic operation, an image pickup element for photographing the eyeglasses F mounted on the eyeglass support unit 10 from above may be provided. The control unit 70 may acquire the warp angle θ of the frame by performing image processing on the captured image of the spectacles F captured by the image pickup element. Of course, in the case of automatic, the warp angle θ may be received from a device different from the measuring device 1, or the corresponding warp angle θ may be called from the data accumulated in advance.

Further, in this embodiment, the case where the operator measures the refractive power n of the lens LE has been described as an example, but the present invention is not limited to this. For example, the value of the refractive index of a general lens (for example, 1.67, etc.) may be stored in the memory 75 in advance. In this case, the control unit 70 can refer to the memory 75. The refractive index of the lens may be acquired.

In this embodiment, the configuration for acquiring the first optical characteristic at the optical center O of the lens LE has been described as an example, but the present invention is not limited to this. For example, the first optical characteristic may be acquired at a position where the measured value of the prism power of the lens LE becomes 0. Further, such a first optical characteristic may be corrected to obtain a second optical characteristic at a position where the measured value of the prism power becomes 0.

In this embodiment, the first image 90 showing the first optical characteristics after the lens LE is framed and the second image 91 showing the second optical characteristics before the lens LE is framed are arranged in parallel on the monitor 4. The configuration for displaying the image is described as an example, but the present invention is not limited to this. For example, the monitor 4 displays either the first image 90 showing the first optical characteristics after the lens LE is framed or the second image 91 showing the second optical characteristics before the lens LE is framed. May be. In this case, a switching button for switching between the first image 90 and the second image 91 may be displayed on the display screen of the monitor 4. The operator operates the monitor 4 to select a switching button, and the control unit 70 switches between the first image 90 and the second image 91 according to the input signal from the monitor 4, and the first image 90 and the first image 90 and the second image 91. Any one of the two images 91 may be displayed on the monitor 4.

In this embodiment, the spherical power is taken as an example of the optical characteristics of the lens LE, and the first spherical power after the frame of the lens LE (that is, the spherical power that reproduces the wearing state of the lens LE) is used as the lens LE. The configuration for correcting to the second spherical power before frame insertion (that is, the spherical power in the non-wearing state of the lens LE) has been described as an example, but the present invention is not limited to this. For example, with regard to the cylindrical power of the lens LE, similarly, the first cylindrical power after the frame of the lens LE (that is, the cylindrical power of the lens LE in the worn state) is set to the second cylindrical power before the frame of the lens LE (that is, the cylindrical power of the lens LE). That is, the configuration may be such that the lens LE is corrected to the cylindrical power) in the non-wearing state.

In this case, the control unit 70 sets the first cylindrical power C1 after the frame of the lens LE to the lens LE based on the angle α formed by the optical axis N1 of the measurement optical system 20 and the optical axis N2 of the lens LE. It is corrected to the second cylindrical frequency C2 before the frame is inserted. For example, the second cylindrical power C2 of the lens LE can be calculated by the following mathematical formula.

For example, for the spectacles F currently worn by the wearer, the warp angle θ of the frame is 20 degrees, the refractive index n of the lens LE is 1.67, and the first cylindrical power C1 after the lens LE is framed is −0. If it is 7D, the second cylindrical power C2 before the frame of the lens LE is calculated to be −0.0D.

In this embodiment, the first optical characteristic after the frame of the lens LE is corrected to the second optical characteristic before the frame of the lens LE by using the calculation formula based on the warp angle θ of the frame, and the lens is used. The configuration for acquiring the second optical characteristic before the LE is framed has been described as an example, but the present invention is not limited to this. For example, as a configuration for acquiring the second optical characteristic of the lens LE by using a correction table in which the warp angle θ of the frame, the first optical characteristic of the lens LE, and the second optical characteristic of the lens LE are associated with each other. May be good. For example, the correction table may be created in advance by an experiment or a simulation and stored in the memory 75. Further, the correction table may be provided for each first optical characteristic of the lens LE (for example, spherical power, cylindrical power, astigmatic axis angle, each).

FIG. 10 is an example of a correction table. Note that FIG. 10 shows a correction table in which the warp angle θ of the frame, the first spherical power S1 after the lens LE is framed, and the second spherical power S2 before the lens LE is framed are associated with each other. There is. For example, the correction table may be associated with the second spherical power S2 before the frame of the lens LE at a predetermined warp angle θ (for example, the warp angle in steps of 5 degrees) of the frame. Further, for example, the correction table may be associated with the second spherical power S2 before the frame of the lens LE at a predetermined first spherical power of the lens (for example, the first spherical power of the 5 degree step). .. The control unit 70 can acquire the second optical characteristic before the frame of the lens LE by referring to the warp angle θ of the frame and the first spherical power S1 after the frame of the lens LE.

In this embodiment, when the warp angle θ of the frame is larger than the predetermined warp angle, the first optical characteristic after the frame of the lens LE is set to the second optical characteristic before the frame of the lens LE. It may be configured to be corrected to the optical characteristics. For example, depending on the warp angle θ of the frame, the difference between the first optical characteristic after the frame of the lens LE and the second optical characteristic before the frame of the lens LE is small, so that the first optical characteristic of the lens LE It may not be necessary to correct the optical characteristics to the second optical characteristics. Therefore, a threshold value is set for the warp angle θ of the frame, and it is determined whether or not to correct the first optical characteristic of the lens LE to the second optical characteristic based on whether or not the warp angle θ of the frame exceeds the threshold value. May be done. The threshold value for the warp angle θ of the frame may be created in advance by an experiment or a simulation and stored in the memory 75. For example, in this way, at least when the warp angle of the frame is large, the original optical characteristics of the lens, which are not affected by the warp angle of the frame, can be appropriately adjusted by correcting the first optical characteristic of the lens to the second optical characteristic. Can be obtained in.

In this embodiment, when the first optical characteristic after the frame of the lens LE exceeds a predetermined value, the first optical characteristic after the frame of the lens LE is set to the second optical characteristic before the frame of the lens LE. It may be configured to correct the optical characteristics. For example, depending on the first optical characteristic after the frame of the lens LE, the difference between the first optical characteristic after the frame of the lens LE and the second optical characteristic before the frame of the lens LE is small. , It may not be necessary to correct the first optical characteristic of the lens LE to the second optical characteristic. Therefore, a threshold value is set for the first optical characteristic after the lens LE is framed, and the first optical characteristic of the lens LE is set to the second optical characteristic based on whether or not the first optical characteristic of the lens LE exceeds the threshold value. It may be decided whether or not to correct to. The threshold value for the first optical characteristic after the lens LE is framed may be created in advance by an experiment or a simulation and stored in the memory 75. For example, in this way, when at least the first optical characteristic after the frame of the lens LE exceeds a predetermined value, the warp angle of the frame is corrected by correcting the first optical characteristic of the lens to the second optical characteristic. It is possible to appropriately acquire the original optical characteristics of the lens that are not affected by the above.

The threshold value for the first optical characteristic of the lens LE after being framed may be set in a direction in which the value of the first optical characteristic of the lens LE becomes smaller. Further, the threshold value for the first optical characteristic after the lens LE is framed may be set in the direction in which the value of the first optical characteristic of the lens LE increases. Further, the threshold value for the first optical characteristic after the frame of the lens LE is set in the direction in which the value of the first optical characteristic of the lens LE decreases and the direction in which the value of the first optical characteristic of the lens LE increases. It may be provided as an allowable range.

Of course, in this embodiment, both a threshold value for the warp angle θ of the frame and a threshold value for the first optical characteristic after the lens LE is framed may be provided. For example, when the warp angle θ of the frame exceeds the threshold value and the first optical characteristic of the lens LE exceeds the threshold value, the first optical characteristic of the lens LE may be corrected to the second optical characteristic. Further, for example, if either the warp angle θ of the frame or the first optical characteristic of the lens LE does not exceed the threshold value, the first optical characteristic of the lens LE may not be corrected to the second optical characteristic. good. Further, for example, when both the warp angle θ of the frame and the first optical characteristic of the lens LE do not exceed the threshold value, it is not necessary to correct the first optical characteristic of the lens LE to the second optical characteristic.

In this embodiment, the first optical characteristic after the frame of the lens LE is corrected, and the influence of the warp angle θ of the frame is canceled, and the second optical characteristic before the frame of the lens LE is acquired. The explanation has been given as an example, but the present invention is not limited to this. For example, when the spectacles F are held by the spectacle support unit 10 and the forward tilt angle of the frame is adjusted, the first tilt angle of the lens LE in the wearing state reflects the forward tilt angle of the frame and the warp angle θ of the frame. Optical characteristics are acquired. Therefore, the first optical characteristic after the frame of the lens LE is corrected, and both the influence of the forward tilt angle of the frame and the influence of the warp angle θ of the frame are canceled, before the frame of the lens LE is framed. It may be configured to acquire the second optical characteristic.

In this embodiment, the configuration in which the second optical characteristic of the lens LE is displayed on the monitor 4 as it is has been described as an example, but the present invention is not limited to this. For example, lenses are generally made at predetermined intervals (eg, 0.25D intervals). Therefore, when the second optical characteristic of the lens LE does not reach the value of the predetermined interval, the control unit 70 sets the value of the second optical characteristic to the value of the predetermined interval (for example, -5.0D, -5.25D). , -5.5D, ...), And the value of the predetermined interval at which the difference is the smallest may be displayed on the monitor 4 as the second optical characteristic. This makes it easier to identify the original optical characteristics of the lens LE framed in the frame.

In this embodiment, the case where the lens LE is a single focus lens has been described as an example, but the present invention is not limited to this. For example, the lens LE may be a progressive focus lens. At this time, the control unit 70 hides the index patterns on the first transmissive display 24a and the second transmissive display 24b, and detects an image of a hidden mark applied to the progressive focus lens from the obtained measurement image. You may. Further, the control unit 70 may specify at least one of the distance measurement reference point and the near portion design reference point from the hidden mark of the progressive focus lens, and acquire the first optical characteristic at these positions. good. The control unit 70 estimates at least one of the distance measurement reference point and the near portion design reference point based on the distribution of the optical characteristics of the lens LE, and acquires the first optical characteristics at these positions. It may be configured to be used.

1 Eyeglass lens measuring device 10 Eyeglass support unit 20 Measuring optical system 21 Light source 24 Transmissive display 27 Imaging element 70 Control unit 75 Memory

Claims (6)

It is a spectacle lens information acquisition device.
An optical characteristic acquisition means for acquiring the first optical characteristic of the spectacle lens framed in the spectacle frame, and
A warp angle acquisition means for acquiring the warp angle of the spectacle frame, and
A correction means for correcting the first optical characteristic of the spectacle lens to a second optical characteristic in which the warp angle in the first optical characteristic is canceled based on the warp angle of the spectacle frame.
An output means for outputting the second optical characteristic and
A spectacle lens information acquisition device characterized by being equipped with. In the spectacle lens information acquisition device of claim 1,
The output means is a spectacle lens information acquisition device characterized in that the first optical characteristic of the spectacle lens and the second optical characteristic of the spectacle lens are output in a comparable manner. In the spectacle lens information acquisition device of claim 1 or 2.
The correction means is characterized in that when the warp angle of the spectacle frame is a warp angle larger than a predetermined warp angle, the first optical characteristic of the spectacle lens is corrected to the second optical characteristic. Eyeglass lens information acquisition device. In the spectacle lens information acquisition device according to any one of claims 1 to 3.
The correction means obtains optical characteristics in a state where the optical axis of the spectacle lens and the optical axis of the measured light beam applied to the spectacle lens coincide with each other based on the warp angle of the spectacle frame. , A spectacle lens information acquisition device, characterized in that the first optical characteristic is corrected to the second optical characteristic. In the spectacle lens information acquisition device according to any one of claims 1 to 4.
A holding means for holding the spectacle frame and
A lens measuring means for measuring the first optical characteristic of the spectacle lens by irradiating the spectacle lens with a measurement light beam from a light source and detecting the measurement light beam passing through the spectacle lens with a detector. A spectacle lens information acquisition device characterized by being provided. This is a spectacle lens information acquisition program used in the spectacle lens information acquisition device.
By being executed by the processor of the spectacle lens information acquisition device,
An optical characteristic acquisition step for acquiring the first optical characteristic of the spectacle lens framed in the spectacle frame, and
The warp angle acquisition step for acquiring the warp angle of the spectacle frame, and
A correction step of correcting the first optical characteristic of the spectacle lens to a second optical characteristic in which the warp angle in the first optical characteristic is canceled based on the warp angle of the spectacle frame.
An output step that outputs the second optical characteristic and
Is executed by the spectacle lens information acquisition device.

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