JP2021105572A - Spectacle lens measuring device - Google Patents

Abstract

To provide a spectacle lens measuring device that can accurately acquire, with a simple configuration, the optical characteristics of and lens information on a spectacle lens.SOLUTION: A spectacle lens measuring device measures a spectacle lens, and comprises: a light source that radiates a measurement light bundle toward the spectacle lens; a transmission type display that transmits the measurement light bundle from the light source and can display an index pattern formed by arranging a plurality of indices; display control means that controls the display of the index pattern; a detector that detects the measurement light bundle passing through the spectacle lens and the transmission type display; optical characteristics acquisition means that acquires the optical characteristics of the spectacle lens based on a result of detection performed by the detector; and lens information acquisition means that acquires lens information different from the optical characteristics of the spectacle lens based on the result of detection performed by the detector. When the index pattern is displayed, the optical characteristics are acquired, and when at least part of the index pattern is hidden, the lens information is acquired.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a spectacle lens measuring device for measuring the optical characteristics of a spectacle lens.

A spectacle lens measuring device including an optical system for measuring the optical characteristics of the spectacle lens and an optical system for detecting the lens information (hidden mark) of the spectacle lens is known (see, for example, Patent Document 1). ).

JP-A-2018-54454

By the way, in Patent Document 1, an optical system for obtaining the optical characteristics of the spectacle lens and an optical system for obtaining the lens information of the spectacle lens are provided for each, and there is a problem that the configuration of the apparatus becomes complicated. rice field. Further, the alignment between the spectacle lens and each optical system is troublesome, and the optical characteristics of the spectacle lens and the lens information cannot be easily obtained.

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 accurately acquiring optical characteristics and lens information of a spectacle lens with a simple configuration.

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

(1) The optical lens measuring device according to the first aspect of the present disclosure is an optical lens measuring device that measures an optical lens, and is a light source that irradiates a measurement light beam toward the optical lens and the measurement from the light source. A transmissive display that transmits a light beam and is capable of displaying an index pattern formed by arranging a plurality of indexes, a display control means for controlling the display of the index pattern, and the optics. A detector that detects the measured light beam via the lens and the transmissive display, an optical characteristic acquisition means that acquires the optical characteristics of the spectacle lens based on the detection result of the detector, and the detector. The optical characteristic acquisition means is provided with a lens information acquisition means for acquiring lens information different from the optical characteristics of the spectacle lens based on the detection result, and the index pattern is displayed by the display control means. The optical characteristics are acquired by the above means, and at least a part of the index pattern is hidden by the display control means, so that the lens information is acquired by the lens information acquisition means.

It is an external view of the 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 a measuring device. It is a schematic diagram which shows the measured luminous flux from a light source. It is a figure which shows the meridian direction of a lens. This is an example of a measurement image. This is an example of a measurement optical system including one transmissive display. This is an example of a configuration in which an optical path in which the measured luminous flux is guided by the left lens and an optical path guided by the right lens are different optical paths. This is an example of a configuration in which a display is used as a light source. This is an example of an irradiation pattern that can be displayed on a display.

<Overview>
An outline of the spectacle lens measuring 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.

<Measurement optical system>
The spectacle lens measuring device in the present embodiment includes a measuring optical system (for example, a measuring optical system 20). The measurement optical system includes a configuration for measuring the optical characteristics of the spectacle lens. For example, the optical characteristics of the spectacle lens may be at least one of spherical power, cylindrical power, astigmatic axis angle, prism amount, and the like. Further, the measurement optical system includes a configuration for acquiring lens information of the spectacle lens. For example, the lens information of a spectacle lens is information different from the optical characteristics. For example, the lens information of the spectacle lens may be different from the optical characteristics measured by the measurement optical system. As an example, the lens information of the spectacle lens includes information on the hidden mark formed on the spectacle lens, information on the mark point on the spectacle lens, information on the print mark on the spectacle lens, and information on the outer shape of the spectacle lens. Etc. may be at least one of them. For example, the measurement optical system may have at least a part of a configuration for measuring the optical characteristics of the spectacle lens and a configuration for acquiring lens information of the spectacle lens.

The measurement optical system may include at least a light source, a transmissive display, and a detector. For example, the optical characteristics of the spectacle lens are measured by projecting the measured luminous flux from the light source toward the spectacle lens and detecting the measured luminous flux passing through the spectacle lens and the transmissive display with a detector. May be good. The measurement optical system may include a retroreflective member capable of reflecting the measured luminous flux from the light source in the incident direction and returning it to illuminate the spectacle lens. Further, the measurement optical system may include an optical member (for example, a collimator lens 23) for shaping the measured luminous flux from the light source. Further, the measurement optical system 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.

<Light source>
The spectacle lens measuring device in the present embodiment includes a light source (for example, a light source 21). The light source irradiates the measured luminous flux toward the spectacle lens. The light source may be arranged at any position. The light source may be a point light source. In this case, for example, an LED (Light Emitting Diode) or the like may be used as the point light source. Further, the light source may be a surface light source. In this case, for example, a light emitting panel or the like may be used as the surface light source.

The light source may be a display capable of illuminating the spectacle lens by irradiating the measurement luminous flux toward the spectacle lens. In this case, for example, as the light source, at least one of a liquid crystal display, an organic EL display, a plasma display, and the like may be used. The display can project the irradiation pattern onto the spectacle lens by displaying an irradiation pattern different from the index pattern formed by arranging a plurality of indexes described later. Further, by illuminating the spectacle lens, the display obtains a spectacle lens image, an index pattern image (index image) projected on the spectacle lens, an irradiation pattern image projected on the spectacle lens, and the like in a high contrast state. This makes it possible to improve the detection accuracy of these images.

The light source may include a first light source and a second light source. For example, the first light source may be a light source for a left lens that irradiates a measured luminous flux toward the left lens of the spectacle lens. Further, for example, the second light source may be a light source for a right lens that irradiates a measurement luminous flux toward the right lens of the spectacle lens.

The first light source and the second light source may be used in combination. That is, the first light source (second light source) may irradiate the measured luminous flux toward the left lens of the spectacle lens and the right lens of the spectacle lens. For example, the first light source (second light source) may irradiate the left lens and the right lens in order with the measured luminous flux. In this case, a changing means (for example, a motor or the like) for changing the relative positional relationship between the first light source (second light source) and the spectacle lens may be provided. Further, for example, the first light source (second light source) may irradiate both the left lens and the right lens with the measured luminous flux. As an example, by arranging both the left lens and the right lens in the optical path where the measured luminous flux is emitted from the first light source (second light source), both the left lens and the right lens are irradiated with the measured luminous flux. May be good. As a result, the optical characteristics of the left lens and the right lens can be acquired at the same time. Further, by this, lens information can be acquired simultaneously in the left lens and the right lens.

The first light source and the second light source may be provided in pairs on the left and right. That is, the first light source may irradiate the measurement luminous flux toward the left lens of the spectacle lens, and the second light source may irradiate the measurement luminous flux toward the right lens of the spectacle lens. In this case, at least a part of the first optical path in which the measured light beam is guided from the first light source toward the left lens and the second optical path in which the measured light beam is guided from the second light source toward the right lens. The optical path may be a common optical path. Further, in this case, a first optical path in which the measured luminous flux is guided from the first light source toward the left lens, a second optical path in which the measured luminous flux is guided from the second light source toward the right lens, and different optical paths. May be done.

For example, the first light source and the second light source may be turned on at different timings, and the left lens and the right lens may be irradiated with the measured luminous flux in order. Further, for example, the first light source and the second light source may be turned on at the same (substantially the same) timing, and both the left lens and the right lens may be irradiated with the measured luminous flux. That is, the measured luminous flux may be applied to the left lens and the right lens at the same time (substantially at the same time).

<Transparent display>
The spectacle lens measuring device in the present embodiment includes a transmissive display (for example, a transmissive display 24). The transmissive display transmits the measured luminous flux from the light source. Further, the transmissive display makes it possible to display an index pattern (for example, index pattern 30) formed by arranging a plurality of indexes (for example, index 31).

In a transmissive display, an index pattern formed by arranging a plurality of indexes is used for measuring the optical characteristics of an spectacle lens. The plurality of indexes are formed by an arbitrary shape, an arbitrary position, an arbitrary number, and the like, whereby the index pattern is expressed. As an example, the plurality of indicators may have at least one shape such as a point (for example, a circular point, a quadrangular point, etc.), a line (for example, a solid line, a dotted line, a broken line, etc.). Further, as an example, the plurality of indexes may be arranged in at least one of a grid pattern, a radial pattern, a concentric pattern, and the like.

In the measurement of the optical characteristics of the spectacle lens, the position information indicating the passing position where the measured luminous flux from the light source has passed through the transmissive display may be acquired by using the index pattern. Therefore, it is preferable that the plurality of indexes are displayed so that the position information of the passing position of the transmissive display in the measured luminous flux from the light source can be grasped.

The transmissive display may include a first transmissive display and a second transmissive display. For example, the first transmissive display may be a transmissive display for a left lens that projects an index pattern image onto the left lens of the spectacle lens. Further, for example, the second transmissive display may be a transmissive display for a right lens that projects an index pattern image onto the right lens of the spectacle lens.

The first transmissive display and the second transmissive display may be used in combination. That is, the first transmissive display (second transmissive display) may project an index pattern image on the left lens of the spectacle lens and the right lens of the spectacle lens. For example, the first transmissive display (second transmissive display) may project an index pattern image on both the left lens and the right lens by displaying the index pattern. As a result, the index pattern can be projected onto the left lens and the right lens at the same time.

Further, for example, the first transmissive display (second transmissive display) may project an index pattern image onto the left lens and the right lens in order. In this case, the first transmissive display (second transmissive display) may have a first region for projecting the index pattern image on the left lens and a second region for projecting the index pattern image on the right lens. good. The first transmissive display (second transmissive display) may project the index pattern image to the left lens and the right lens in order by displaying the index pattern in each region at different timings.

The first transmissive display and the second transmissive display may be provided in pairs on the left and right. That is, the first transmissive display may project the index pattern image on the left lens of the spectacle lens, and the second transmissive display may project the index pattern image on the right lens of the spectacle lens. For example, the first transmissive display and the second transmissive display may project the index pattern image on both the left lens and the right lens by displaying the index pattern at the same (substantially the same) timing. .. That is, the vote pattern image may be projected onto the left lens and the right lens at the same time (substantially at the same time). Further, for example, the first transmissive display and the second transmissive display may project the index pattern image to the left lens and the right lens in order by displaying the index pattern at different timings.

For example, by displaying an index pattern on a transmissive display, position information of a passing position where the measured luminous flux from the light source has passed at least two points in the optical axis direction is acquired, and based on this, the optical characteristics of the spectacle lens are obtained. Be measured. As an example, the optics of the spectacle lens is used by using the position information indicating the passing position where the measured luminous flux from the light source has passed through the spectacle lens and the position information indicating the passing position where the measured luminous flux from the light source has passed through the transmissive display. Properties may be measured. More specifically, the position information indicating the passing position where the measured luminous flux from the light source has passed through the left lens of the spectacle lens and the position information indicating the passing position where the measured luminous flux from the light source has passed through the first transmissive display. It may be used to measure the optical characteristics of the left lens. Further, the position information indicating the passing position where the measured luminous flux from the light source has passed through the right lens of the spectacle lens and the position information indicating the passing position where the measured luminous flux from the light source has passed through the second transmissive display are used. The optical properties of the right lens may be measured.

Further, as an example, the optical characteristics of the spectacle lens may be measured by using only the position information indicating the passing position where the measured luminous flux from the light source has passed through the transmissive display. More specifically, the optical characteristics of the left lens may be measured by using only the position information indicating the passing position where the measured luminous flux from the light source has passed through the first transmissive display. Further, the optical characteristics of the right lens may be measured by using only the position information indicating the passing position where the measured luminous flux from the light source has passed through the second transmissive display. In such a case, a changing means (for example, a moving mechanism 28) for changing the relative positional relationship between the first transmissive display and the left lens may be provided. Further, in such a case, a changing means (for example, a moving mechanism 28) for changing the relative positional relationship between the second transmissive display and the right lens may be provided.

The first transmissive display may include a transmissive display capable of displaying the first index pattern and a transmissive display capable of displaying the second index pattern. That is, the transmissive display capable of displaying the first index pattern projects the first index pattern image on the left lens of the spectacle lens, and the transmissive display capable of displaying the second index pattern is the second on the left lens of the spectacle lens. A two-index pattern image may be projected. The transmissive display capable of displaying the first index pattern and the transmissive display capable of displaying the second index pattern are arranged at different positions in the optical axis direction. The first index pattern and the second index pattern may be the same index pattern. Of course, the first index pattern and the second index pattern may be at least partially different index patterns.

Further, the second transmissive display may include a transmissive display capable of displaying the first index pattern and a transmissive display capable of displaying the second index pattern. That is, the transmissive display capable of displaying the first index pattern projects the first index pattern image on the right lens of the spectacle lens, and the transmissive display capable of displaying the second index pattern is the first on the right lens of the spectacle lens. A two-index pattern image may be projected. The transmissive display capable of displaying the first index pattern and the transmissive display capable of displaying the second index pattern are arranged at different positions in the optical axis direction. The first index pattern and the second index pattern may be the same index pattern. Of course, the first index pattern and the second index pattern may be at least partially different index patterns.

For example, by displaying the index pattern on each of the transmissive display capable of displaying the first index pattern and the transmissive display capable of displaying the second index pattern, the measured luminous flux from the light source is at least at least in the optical axis direction. The position information of the passing position that has passed through the two points is acquired, the refraction angle of the measured luminous flux is obtained based on this, and the optical characteristics of the spectacle lens are measured. More specifically, in the first transmissive display, the position information indicating the passing position where the measured luminous flux from the light source has passed through the transmissive display capable of displaying the first index pattern and the measured luminous flux from the light source are the second index pattern. The optical characteristics of the left lens of the spectacle lens may be measured by using the position information indicating the passing position through the transmissive display capable of displaying. Further, in the second transmissive display, the position information indicating the passing position where the measured luminous flux from the light source has passed through the transmissive display capable of displaying the first index pattern and the measured luminous flux from the light source can display the second index pattern. The optical characteristics of the right lens of the spectacle lens may be measured by using the position information indicating the passing position through the transmissive display.

For example, by providing a transmissive display capable of displaying the first index pattern and a transmissive display capable of displaying the second index pattern at different positions in the optical axis direction, the measured luminous flux from the light source passes through the spectacle lens. Regardless of the position, the position information of the passing position where the measured luminous flux from the light source has passed at least two points in the optical axis direction can be obtained, whereby the optical characteristics of the spectacle lens are measured. The optical characteristics of the spectacle lens can be accurately acquired with a simple configuration without providing a changing means for changing the relative positional relationship between the spectacle lens and the transmissive display.

<Detector>
The spectacle lens measuring device in the present embodiment includes a detector (for example, an image pickup device 27). The detector detects the measured luminous flux via the spectacle lens and the transmissive display. For example, the detector may detect the measured luminous flux via the spectacle lens and the first transmissive display and the measured luminous flux via the spectacle lens and the second transmissive display. Further, for example, the detector may detect the reflected luminous flux in which the measured luminous flux emitted from the light source is reflected by the retroreflective member described later. Further, for example, the detector may detect the measured luminous flux from the display used as the light source.

The detector may be placed at any position on the spectacle lens. The detector may detect the measured luminous flux based on the signal (signal data). Further, the detector may detect the measured luminous flux based on the image (image data) obtained by converting the signal (signal data).

The detector may include a first detector and a second detector. For example, the first detector may be a left lens detector that detects a measured luminous flux that has passed through the left lens of the spectacle lens and the transmissive display. Further, for example, the second detector may be a detector for a right lens that detects a measured luminous flux passing through the right lens of the spectacle lens and the transmissive display.

The first detector and the second detector may be used in combination. That is, the first detector (second detector) detects the measured luminous flux via the left lens of the spectacle lens and the transmissive display and the measured luminous flux via the right lens of the spectacle lens and the transmissive display. You may. For example, the first detector (second detector) may detect the measured luminous flux via the left lens and the transmissive display and the measured luminous flux via the right lens and the transmissive display in order. In this case, a changing means (for example, a motor or the like) for changing the relative positional relationship between the first detector (second detector) and the spectacle lens may be provided. Further, for example, the first detector (second detector) detects both the measured luminous flux passing through the left lens and the transmissive display and the measured luminous flux passing through the right lens and the transmissive display. May be good. As a result, the optical characteristics of the left lens and the right lens can be acquired at the same time. Further, by this, lens information can be acquired simultaneously in the left lens and the right lens.

The first detector and the second detector may be provided in pairs on the left and right. That is, the first detector detects the measured luminous flux passing through the left lens of the spectacle lens and the transmissive display, and the second detector detects the measured luminous flux passing through the right lens of the spectacle lens and the transmissive display. You may. For example, the first detector and the second detector may detect the measured luminous flux via the left lens and the transmissive display and the measured luminous flux via the right lens and the transmissive display in order. Further, for example, the first detector and the second detector detect both the measured luminous flux via the left lens and the transmissive display and the measured luminous flux via the right lens and the transmissive display. May be good. That is, the measured luminous flux passing through the left lens and the transmissive display and the measured luminous flux passing through the right lens and the transmissive display may be detected at the same time.

When the first detector and the second detector are provided in pairs on the left and right, the number of pixels of the detector can be effectively used for each of the left lens and the right lens of the spectacle lens, and the index pattern image (index pattern image). The position of the index image) can be detected more accurately to improve the measurement accuracy of the optical characteristics. In addition, since it is not necessary to distinguish between the measured luminous flux via the left lens and the transmissive display and the measured luminous flux via the right lens and the transmissive display, the optical characteristics of the spectacle lens can be determined by simpler control. Lens information and can be obtained.

<Retroreflective member>
The spectacle lens measuring device in the present embodiment includes a retroreflective member (for example, a retroreflective member 25). The retroreflective member is irradiated from the light source toward the spectacle lens, and the measured luminous flux passing through the spectacle lens and the transmissive display is reflected back in the incident direction to irradiate the spectacle lens with the reflected luminous flux of the measured luminous flux. It is possible to do. That is, the retroreflective member irradiates the spectacle lens with the reflected luminous flux of the measured luminous flux by making the incident direction in which the measured luminous flux from the light source is incident and the reflection direction in which the measured luminous flux from the light source is reflected parallel (substantially parallel). It is possible to do. In other words, the retroreflective member can reflect the measured luminous flux from the light source to illuminate the spectacle lens. Thereby, the spectacle lens image and the index pattern image (index image) projected on the spectacle lens can be obtained in a state of high contrast, and the detection accuracy of these images can be improved.

For example, the retroreflective member may reflect the measured luminous flux from the light source and irradiate the front surface of the spectacle lens with the reflected luminous flux of the measured luminous flux. As an example, when the light source and the detector are arranged on the rear surface side of the spectacle lens, by arranging the retroreflective member on the front side of the spectacle lens, the measured luminous flux from the light source is reflected, and the spectacle lens The reflected luminous flux of the measured luminous flux may be irradiated on the front surface. Further, for example, the retroreflective member may reflect the measured luminous flux from the light source and irradiate the rear surface of the spectacle lens with the reflected luminous flux of the measured luminous flux. As an example, when the light source and the detector are arranged on the front side of the spectacle lens, the retroreflective member is arranged on the rear surface side of the spectacle lens to reflect the measured luminous flux from the light source and to reflect the measured luminous flux of the spectacle lens. The back surface may be irradiated with the reflected luminous flux of the measured luminous flux.

The retroreflective member may include a first retroreflective member and a second retroreflective member. For example, the first retroreflective member is irradiated from the light source toward the left lens of the spectacle lens, and the measured luminous flux passing through the left lens and the transmissive display is reflected back in the incident direction to the left lens. It may be a retroreflective member for a left lens that irradiates the reflected luminous flux of the measured luminous flux. Further, for example, the second retroreflective member is irradiated from the light source toward the right lens of the spectacle lens, and the measured light beam passing through the right lens and the transmissive display is reflected back in the incident direction to the right. It may be a retroreflective member for a right lens that irradiates a lens with a reflected light beam of a measured light beam.

The first retroreflective member and the second retroreflective member may be used in combination. That is, the first retroreflective member (second retroreflective member) reflects the measured light beam radiated from the light source toward the left lens of the spectacle lens in the incident direction and returns the measured light beam to the left lens. The right lens may be irradiated with the reflected light beam of the measured light beam by irradiating the reflected light beam and reflecting the measured light beam radiated from the light source toward the right lens of the spectacle lens in the incident direction.

The first retroreflective member and the second retroreflective member may be provided in pairs on the left and right. That is, the first retroreflective member irradiates the left lens with the reflected light beam of the measured light beam by reflecting the measured light beam emitted from the light source toward the left lens of the spectacle lens in the incident direction and returning the second lens. The retroreflective member may irradiate the right lens with the reflected light beam of the measured light beam by reflecting the measured light beam emitted from the light source toward the right lens of the spectacle lens in the incident direction and returning it.

If the spectacle lens can be sufficiently illuminated by reflecting the measured luminous flux from the light source, it is not always necessary to provide the retroreflective member. Further, when one of the light source and the detector is arranged on the front side of the spectacle lens and the other of the light source and the detector is arranged on the rear surface side of the spectacle lens, it is not always necessary to provide the retroreflective member. ..

<Optical arrangement of measurement optical system>
In the present embodiment, the measurement optical system may include a light source, a detector, a transmissive display, a retroreflective member, and the like. Further, in the present embodiment, in the measurement optical system, the light source and the detector may be arranged on the front surface side of the spectacle lens, and the transmissive display and the reflective member may be arranged on the rear surface side of the spectacle lens.

For example, in the measurement optical system, when the first light source and the second light source are used in combination and the first detector and the second detector are also used, the measured luminous flux emitted from the light source is the left lens of the spectacle lens. Both the right lens and the right lens are irradiated. It is reflected by the retroreflective member via the left lens and the transmissive display, and again becomes the measured light beam via the transmissive display and the left lens, and becomes the retroreflective member via the right lens and the transmissive display. Both the reflected light and the measured light beam passing through the transmissive display and the right lens are detected by the detector again.

For example, in a measurement optical system, when a first light source and a second light source are provided in a pair on the left and right, and a first detector and a second detector are provided in a pair on the left and right, the measured luminous flux emitted from the first light source is emitted. , It is reflected by the retroreflective member via the left lens of the spectacle lens and the transmissive display, and is detected again by the first detector via the transmissive display and the left lens. Further, the measured luminous flux emitted from the second light source is reflected by the retroreflective member via the right lens of the spectacle lens and the transmissive display, and is again detected via the transmissive display and the right lens. Detected by the vessel.

For example, in the measurement optical system, when the first light source and the second light source are used in combination and the first detector and the second detector are provided in pairs on the left and right, the measured luminous flux emitted from the light source is on the left side of the spectacle lens. Both the lens and the right lens are illuminated. The measured light beam that is reflected by the retroreflective member via the left lens and the transmissive display and again passes through the transmissive display and the left lens is detected by the first detector, and the right lens and the transmissive display are displayed. The measured light beam that is reflected by the retroreflective member via the above and again passes through the transmissive display and the right lens is detected by the second detector.

For example, in the measurement optical system, when the first light source and the second light source are provided in pairs on the left and right, and the first detector and the second detector are also used, the measured luminous flux emitted from the first light source is the spectacle lens. The left lens of the lens is irradiated, and the measured luminous flux emitted from the second light source is irradiated to the right lens of the spectacle lens. It is reflected by the retroreflective member via the left lens and the transmissive display, and again becomes the measured light beam via the transmissive display and the left lens, and becomes the retroreflective member via the right lens and the transmissive display. Both the reflected light and the measured light beam passing through the transmissive display and the right lens are detected by the detector again.

In any of the above configurations, the first transmissive display and the second transmissive display may be used in combination or may be provided in pairs on the left and right sides in the measurement optical system. The first transmissive display may include a transmissive display capable of displaying the first index pattern and a transmissive display capable of displaying the second index pattern, which are arranged at different positions in the optical axis direction. .. The second transmissive display may include a transmissive display capable of displaying the first index pattern and a transmissive display capable of displaying the second index pattern, which are arranged at different positions in the optical axis direction. .. Further, in any of the above configurations, in the measurement optical system, the first retroreflective member and the second retroreflective member may be used in combination, or may be provided in pairs on the left and right.

Further, in the present embodiment, the measurement optical system may include a display as a light source, a detector, a transmissive display, and the like. Further, in the present embodiment, in the measurement optical system, the detector may be arranged on the front side of the spectacle lens, and the display and the transmissive display may be arranged on the rear surface side of the spectacle lens.

For example, in the measurement optical system, when the first display and the second display are also used and the first detector and the second detector are also used, the measured luminous flux emitted from the display is the left lens of the spectacle lens. Both the right lens and the right lens are irradiated. Both the measured luminous flux passing through the left lens and the transmissive display and the measured luminous flux passing through the right lens and the transmissive display are detected by the detector.

For example, in the measurement optical system, when the first display and the second display are provided in a pair on the left and right, and the first detector and the second detector are provided in a pair on the left and right, the measurement light beam emitted from the first display is emitted. , It is detected by the first detector via the left lens of the spectacle lens and the transmissive display. Further, the measured luminous flux emitted from the second display is detected by the second detector via the right lens of the spectacle lens and the transmissive display.

For example, in the measurement optical system, when the first display and the second display are used in combination and the first detector and the second detector are provided in pairs on the left and right, the measured luminous flux emitted from the display is on the left side of the spectacle lens. Both the lens and the right lens are illuminated. The measured luminous flux passing through the left lens and the transmissive display is detected by the first detector, and the measured luminous flux passing through the right lens and the transmissive display is detected by the second detector.

For example, in the measurement optical system, when the first display and the second display are provided in pairs on the left and right, and the first detector and the second detector are also used, the measured luminous flux emitted from the first display is a spectacle lens. The left lens of the spectacle lens is irradiated, and the measured luminous flux emitted from the second display is irradiated to the right lens of the spectacle lens. Both the measured luminous flux passing through the left lens and the transmissive display and the measured luminous flux passing through the right lens and the transmissive display are detected by the detector.

In any of the above configurations, the first transmissive display and the second transmissive display may be used in combination or may be provided in pairs on the left and right sides in the measurement optical system. The first transmissive display may include a transmissive display capable of displaying the first index pattern and a transmissive display capable of displaying the second index pattern, which are arranged at different positions in the optical axis direction. .. The second transmissive display may include a transmissive display capable of displaying the first index pattern and a transmissive display capable of displaying the second index pattern, which are arranged at different positions in the optical axis direction. ..

<Indicator pattern image detecting means>
The spectacle lens measuring device in this embodiment includes index pattern image detecting means (for example, control unit 70). The index pattern image detecting means detects an image of the index pattern (index pattern image) projected on the spectacle lens based on the detection result of the detector. For example, the index pattern image detecting means may detect the index pattern image based on the signal (signal data) detected by the detector. As an example, the index pattern image detecting means may detect the index pattern image based on the intensity of the signal detected by the detector. Further, for example, the index pattern image detecting means may detect the index pattern image based on the image (image data) obtained by converting the signal detected by the detector. As an example, the index pattern image detecting means may acquire the index pattern image based on at least one of the luminance information, saturation information, hue information, and the like of the image.

For example, the index pattern image detecting means may detect the interval between a plurality of index images constituting the index pattern image based on the detection result of the detector. In this case, the interval between the plurality of index images may be detected by using the pixel position information of the plurality of index images. Further, for example, the index pattern image detecting means may detect the shape of the index image constituting the index pattern image based on the detection result of the detector. In this case, the shape of the index image may be detected by image processing (for example, binarization processing, contour extraction, edge detection, etc.). In this case, the area of the index image may be detected based on the shape of the index image.

<Judgment means>
The spectacle lens measuring device in the present embodiment includes a determination means (for example, a control unit 70). The determination means determines whether the spectacle lens is a minus lens or a plus lens based on the detection result of the detector. For example, the determination means determines whether the spectacle lens is a minus lens or a plus lens based on the change in the pixel position information of the index image constituting the index pattern image obtained as the detection result of the detector. May be good. As an example, the determination means may determine that the spectacle lens is a minus lens when the pixel positions of the index images are close to each other (in other words, when the interval between the index images is narrowed). Further, as an example, the determination means may determine that the spectacle lens is a plus lens when the pixel positions of the index images are separated from each other (in other words, when the interval between the index images is widened).

For example, the determining means may determine whether the spectacle lens is a strong minus lens or a strong plus lens. In this case, the determination means determines whether the spectacle lens is a strength minus lens or a strength plus lens based on the degree of change in the pixel position information of the index image obtained as the detection result of the detector. You may. For example, the degree of change in the pixel position information of the index image is the rate of change in the pixel position information of the index image (magnification rate or reduction rate), the amount of change in the pixel position information of the index image (magnification amount or reduction amount), etc. It may be represented by at least one of.

<Interval setting means>
The spectacle lens measuring device in this embodiment includes an interval setting means (for example, a control unit 70). The interval setting means makes it possible to set the interval between a plurality of indicators constituting the index pattern in the transmissive display. For example, the interval setting means may be able to set the interval of a plurality of indicators constituting the index pattern in the transmissive display to an arbitrary interval. Further, for example, the interval setting means may be able to set the interval of a plurality of indicators constituting the index pattern in the transmissive display to a predetermined interval. As a result, an appropriate index pattern image corresponding to the spectacle lens can be obtained, and the optical characteristics can be accurately acquired. Further, the optical characteristics can be accurately acquired even when measuring a wide range of optical characteristics of the spectacle lens or when acquiring the distribution of the optical characteristics of the spectacle lens.

For example, the interval setting means sets the interval of the plurality of indicators based on the instruction signal for setting the interval of the plurality of indicators. As an example, the interval setting means may set the interval of a plurality of indexes based on the instruction signal input by the operator operating the operation means (for example, the monitor 4). Further, as an example, the interval setting means may set the interval of a plurality of indexes based on the instruction signal output based on the detection result of the detector.

In this case, the interval setting means uses a table or the like in which the detection result detected by the detector and the interval of the plurality of indicators displayed on the transmissive display are associated with each other, and the interval between the plurality of indicators is used. May be set. That is, the interval setting means may set the interval of the plurality of indexes to different intervals according to the detection result detected by the detector. For example, the table may be preset based on the results of experiments and simulations.

Further, in this case, the interval setting means may set the interval of a plurality of indexes based on whether or not the detection result detected by the detector exceeds a predetermined threshold value. That is, the interval setting means may set the interval of a plurality of indicators to different intervals depending on whether the detection result detected by the detector exceeds a predetermined threshold value or is less than the predetermined threshold value. .. A predetermined threshold value may be set as an allowable range. At this time, the interval setting means may set the interval of the plurality of indicators to different intervals depending on whether the detection result detected by the detector is out of the permissible range or within the permissible range. .. For example, a predetermined threshold value may be set in advance based on the results of experiments and simulations.

As a result, the intervals between the plurality of indexes are automatically switched according to the spectacle lens, an appropriate index pattern image corresponding to the spectacle lens can be easily acquired, and the optical characteristics of the spectacle lens can be accurately acquired. It should be noted that such setting of the interval between a plurality of indexes can be particularly effectively used in a fully automated device that automatically performs from the start to the completion of the measurement of optical characteristics after mounting the spectacle lens. can.

The interval setting means may set the interval between a plurality of indexes displayed on the transmissive display based on the detection result of the index pattern image detecting means. As a result, the intervals between the plurality of indexes are automatically set, so that an appropriate index pattern image corresponding to the spectacle lens can be easily obtained.

For example, the interval setting means may set the interval between the plurality of indexes displayed on the transmissive display based on the interval between the plurality of index images constituting the index pattern detected by the index pattern image detecting means. In this case, a table or the like in which the intervals between the plurality of index images constituting the index pattern detected by the index pattern image detecting means and the intervals between the plurality of indexes displayed on the transmissive display are associated with each other is used. You may set the interval of the index. Further, in this case, the interval between the plurality of indexes may be set depending on whether or not the interval between the plurality of index images constituting the index pattern detected by the index pattern image detecting means exceeds a predetermined threshold value. For example, a predetermined threshold value may be set in a direction in which the interval between the index images becomes narrower. Further, for example, a predetermined threshold value may be set in a direction in which the interval between the index images becomes wide. Of course, the predetermined threshold value may be provided as an allowable range in the direction in which the interval between the index images is narrowed and the direction in which the interval between the index images is widened.

Further, for example, the interval setting means may set the interval of the index based on the shapes of a plurality of index images constituting the index pattern detected by the index pattern image detecting means. In this case, the interval between the plurality of indexes is set depending on whether or not the shapes of the plurality of index images detected by the index pattern image detecting means are deformed with respect to the shapes of the plurality of indexes displayed on the transmissive display. You may. Further, in this case, the interval between the plurality of indexes depends on whether or not the degree of deformation (for example, deformation rate, deformation amount, etc.) of the plurality of index images detected by the index pattern image detecting means exceeds a predetermined threshold value. May be set. For example, the deformation of the plurality of index images may be at least one of enlargement, reduction, distortion, chipping, and the like.

Further, for example, the interval setting means may set the interval of a plurality of indexes based on the areas of the plurality of index images constituting the index pattern detected by the index pattern image detecting means. In this case, the interval between the plurality of indexes is set depending on whether or not the area of the plurality of index images detected by the index pattern image detecting means has increased or decreased with respect to the area of the plurality of indexes displayed on the transmissive display. You may. Further, in this case, whether or not the degree of change in area (for example, rate of change, amount of change, etc.) in a plurality of index images constituting the index pattern detected by the index pattern image detecting means exceeds a predetermined threshold value. The interval between a plurality of indicators may be set depending on the above. For example, a predetermined threshold value may be set in a direction in which the area of the index image decreases. Further, for example, a predetermined threshold value may be set in a direction in which the area of the index image increases. Of course, a predetermined threshold value may be provided as an allowable range in the direction in which the area of the index image decreases and in the direction in which the area of the index image increases.

The interval setting means may set the interval of a plurality of indexes constituting the index pattern displayed on the transmissive display based on the acquisition result (calculation result of the calculation means) of the optical characteristic acquisition means. In this case, the interval between the plurality of indexes is set by using a table or the like in which the refractive power of the spectacle lens detected by the optical characteristic acquisition means and the interval between the plurality of indexes displayed on the transmissive display are associated with each other. You may. Further, in this case, the interval between a plurality of indexes may be set depending on whether or not the refractive power of the spectacle lens detected by the optical characteristic acquisition means exceeds a predetermined threshold value. For example, a predetermined threshold value may be set in a direction in which the refractive power of the spectacle lens increases (increases). Further, for example, a predetermined threshold value may be set in a direction in which the refractive power of the spectacle lens becomes smaller (lower). Of course, a predetermined threshold value may be provided as an allowable range in the direction in which the refractive power of the spectacle lens increases and in the direction in which the refractive power of the spectacle lens decreases.

The interval setting means may set the interval of a plurality of indexes constituting the index pattern displayed on the transmissive display based on the determination result of the determination means. In this case, the intervals of a plurality of indexes may be set by using a table or the like in which the type of the spectacle lens determined by the determination means and the intervals of the indexes displayed on the transmissive display are associated with each other.

In the present embodiment, at least one of the above-mentioned detection result of the index pattern image detecting means, the acquisition result of the optical characteristic acquisition means (calculation result of the calculation means), and the determination result of the determination means. The spacing between the plurality of indicators displayed on the transmissive display may be set based on the above.

The interval setting means may be able to set the interval of the plurality of indexes displayed on the transmissive display to two intervals, a first interval and a second interval different from the first interval. As an example, the interval setting means may set the second interval of the plurality of indicators displayed on the transmissive display to be shorter than the first interval of the plurality of indicators displayed on the transmissive display. Further, as an example, the interval setting means may set the second interval of the plurality of indicators displayed on the transmissive display to be longer than the first interval of the plurality of indicators displayed on the transmissive display. good.

Of course, for example, the interval setting means may be able to set the first interval, the second interval, and the third interval different from the first interval and the second interval of the plurality of indexes displayed on the transmissive display. good. As an example, the interval setting means sets the second interval of the plurality of indicators displayed on the transmissive display to be shorter than the first interval of the plurality of indicators displayed on the transmissive display, and the transmissive display. The third interval of the plurality of indicators displayed in may be set to a long interval.

The interval setting means may set the interval of at least a part of the indicators at different intervals in the first interval of the plurality of indicators and the second interval of the plurality of indicators. Further, the interval setting means sets the interval of at least a part of the indicators at different intervals in the first interval of the plurality of indicators, the second interval of the plurality of indicators, and the third interval of the plurality of indicators. You may. For example, the intervals of the plurality of indicators may be set to different intervals only near the center of the index pattern formed by the arrangement of the plurality of indicators.

<Interval switching means>
The spectacle lens measuring device in the present embodiment includes an interval switching means (for example, a control unit 70). The interval switching means includes a first mode in which the first interval of a plurality of indicators is set by the interval setting means (for example, a normal mode) and a second mode in which the second interval of the plurality of indicators is set by the interval setting means (for example, a normal mode). For example, wide interval mode) and. For example, the interval switching means switches between the first mode and the second mode based on an instruction signal for switching between the first mode and the second mode. As an example, the measurement switching means may switch between the first mode and the second mode based on the instruction signal input by the operator operating the operating means. Further, as an example, the interval switching means may switch between the first mode and the second mode based on the instruction signal output based on the detection result of the detector. For example, in this case, the interval switching means may switch between the first mode and the second mode based on the instruction signal output based on the detection result of the detector. More specifically, the interval switching means is output based on at least one of the detection result of the index pattern image detecting means, the acquisition result of the optical characteristic acquisition means (calculation result of the calculation means), the determination result of the determination means, and the like. The first mode and the second mode may be switched based on the instruction signal. Thereby, an appropriate mode can be applied according to the spectacle lens, and the optical characteristics of the spectacle lens can be easily acquired.

<Display control means>
The spectacle lens measuring device in the present embodiment includes display control means (for example, control unit 70). The display control means controls the display of a plurality of indicators on the transmissive display. That is, the display control means controls the display of the index pattern on the transmissive display. The display control means may express an index pattern by displaying a plurality of indexes at predetermined positions on the transmissive display. The predetermined position may be a position designated by the operator or a preset position. Further, the display control means may express the index pattern by displaying a plurality of indexes having the intervals set in the interval setting means. That is, the display control means may use the index pattern properly in correspondence with various spectacle lenses.

For example, the display control means can display an index pattern, which is an array of a plurality of indexes, on a transmissive display. Further, for example, the display control means can hide the index pattern, which is an array of a plurality of indexes, in the transmissive display. For example, the display control means partially displays a plurality of indexes and partially hides the plurality of indexes and partially displays the index pattern (or displays the index pattern) on the transmissive display. Can be partially hidden).

In the present embodiment, the display control means displays the index pattern on the transmissive display, and the optical characteristics of the spectacle lens are acquired by the optical characteristic acquisition means described later. For example, when the transmissive display is arranged at different positions in the optical axis direction, the display control means causes the transmissive display capable of displaying the first index pattern to display the first index pattern, and displays the second index pattern. By displaying the second index pattern on a displayable transmissive display, the optical characteristics of the spectacle lens are acquired by the optical characteristic acquisition means.

When the transmissive display is arranged at different positions in the optical axis direction, the display control means can display the first index pattern and the second index pattern on the transmissive display capable of displaying the first index pattern. The display of the second index pattern on the transmissive display may be controlled individually.

For example, in a transmissive display capable of displaying the first index pattern and a transmissive display capable of displaying the second index pattern, when displaying one of the first index pattern and the second index pattern, the first index is displayed. At least a part of the pattern and the other of the second index pattern may be hidden. As an example, the display control means may hide the second index pattern when displaying the first index pattern and display the second index pattern when hiding the first index pattern. Further, as an example, the display control means hides the second index pattern (in other words, some plurality of indexes) when displaying the first index pattern (in other words, all the plurality of indexes), and the first When the one index pattern (in other words, some plurality of indexes) is hidden, the second index pattern (in other words, all the plurality of indexes) may be displayed. As a result, the first index pattern image and the second index pattern image do not overlap, and the position of each index pattern image (index image) can be accurately detected, so that the optical characteristics can be measured accurately.

Further, when the transmissive display is arranged at different positions in the optical axis direction, the display control means can display the first index pattern and the second index pattern on the transmissive display capable of displaying the first index pattern. The display of the second index pattern on the transmissive display may be controlled at the same time (substantially at the same time). For example, both the first index pattern and the second index pattern may be displayed on the transmissive display capable of displaying the first index pattern and the transmissive display capable of displaying the second index pattern. As a result, the first index pattern image and the second index pattern image can be detected at one time, so that the measurement time is shortened.

In the present embodiment, the display control means hides at least a part of the index patterns of the transmissive display, so that the lens information of the spectacle lens is acquired by the lens information acquisition means described later. For example, when the transmissive display is arranged at different positions in the optical axis direction, the display control means hides at least a part of the first index pattern in the transmissive display capable of displaying the first index pattern. By hiding at least a part of the second index pattern in the transmissive display capable of displaying the two index pattern, the lens information of the spectacle lens is acquired by the lens information acquisition means.

In such a case, the display control means may hide the index pattern (in other words, all the plurality of indexes) on the transmissive display. Further, in such a case, the display control means may hide some index patterns (in other words, some plurality of indexes). For example, the index pattern may be hidden only in the area where the lens information of the spectacle lens can be obtained. As an example, only the index projected on the spectacle lens may be hidden, and the index projected on the outside of the spectacle lens may be displayed. Further, as an example, only the index projected near the hidden mark formed on the spectacle lens may be hidden, and the index projected outside the vicinity of the hidden mark formed on the spectacle lens may be displayed. good.

For example, in the present embodiment, when the index pattern is displayed on the transmissive display by the display control means, the optical characteristics of the spectacle lens are acquired by the optical characteristic acquisition means described later, and the index of the transmissive display is acquired by the display control means. By hiding at least a part of the pattern, the lens information of the spectacle lens is acquired by the lens information acquisition means described later. As a result, it is possible to acquire the optical characteristics of the spectacle lens and the lens information with a simple configuration without providing each optical system for obtaining the optical characteristics or the lens information or requiring complicated control. ..

In the present embodiment, the display control means is switched between the first mode in which the first interval of the plurality of indicators is set and the second mode in which the second interval of the plurality of indicators is set by the interval switching means. If this is the case, either the first index pattern formed by the index having the first interval or the second index pattern formed by the index having the second interval may be displayed on the transmissive display. For example, a spectacle lens capable of accurately acquiring optical characteristics by projecting an index pattern having a predetermined index interval by appropriately setting the first mode and the second mode, and a predetermined index. It is possible to deal with any spectacle lens, which is difficult to obtain optical characteristics accurately by projecting an index pattern having an interval of.

<Means for acquiring optical characteristics>
The spectacle lens measuring device in the present embodiment includes optical characteristic acquisition means (for example, control unit 70). The optical characteristic acquisition means acquires the optical characteristics of the spectacle lens based on the detection result of the detector. The optical characteristic acquisition means may acquire the distribution of the optical characteristics of the spectacle lens by acquiring the optical characteristics at a plurality of positions of the spectacle lens based on the detection result of the detector.

For example, the optical characteristic acquisition means may acquire the optical characteristics of the spectacle lens by performing a ray tracing process on the measured luminous flux from the light source. In this case, the optical characteristic acquisition means may acquire the optical characteristics of the spectacle lens by obtaining the position information of the passing position where the measured luminous flux from the light source has passed at least two points in the optical axis direction. Further, the optical characteristic acquisition means uses the position information of the passing position where the measured light beam from the light source has passed at least two points in the optical axis direction, and the refraction angle at which the measured light beam from the light source is refracted by the refractive power of the spectacle lens. May be calculated to obtain the optical characteristics of the spectacle lens.

As an example, the optical characteristic acquisition means is based on the position information of the passing position where the measured luminous flux from the light source passes through the spectacle lens and the position information of the passing position where the measured luminous flux from the light source passes through the transmissive display. The optical characteristics of the lens may be acquired. Further, as an example, the optical characteristic acquisition means uses a transmissive display capable of displaying the position information of the passing position where the measured luminous flux from the light source has passed through the transmissive display capable of displaying the first index pattern and the transmissive display capable of displaying the second index pattern. The optical characteristics of the spectacle lens may be acquired based on the position information of the passing position.

In the present embodiment, the optical characteristic acquisition means may acquire the refractive power of the spectacle lens as the optical characteristic of the spectacle lens based on the detection result of the detector. That is, in the present embodiment, the optical characteristic acquisition means may also serve as a calculation means for calculating the refractive power of the spectacle lens based on the detection result of the detector.

<Lens information acquisition means>
The spectacle lens measuring device according to the present embodiment includes lens information acquisition means (for example, control unit 70). The lens information acquisition means acquires lens information different from the optical characteristics of the spectacle lens based on the detection result of the detector. For example, the lens information acquisition means may acquire lens information based on a signal (signal data) detected by the detector. As an example, the lens information acquisition means may acquire lens information based on the intensity of the signal detected by the detector. Further, for example, the lens information acquisition means may acquire lens information based on an image (image data) obtained by converting a signal detected by the detector. As an example, the lens information acquisition means may acquire lens information based on at least one of brightness information, saturation information, hue information, and the like of an image.

<Measurement switching means>
The spectacle lens measuring device in the present embodiment includes measurement switching means (for example, a control unit 70). The measurement switching means are a first mode in which the optical characteristics of the spectacle lens are acquired by the optical characteristic acquisition means (for example, an optical characteristic measurement mode) and a second mode in which the lens information of the spectacle lens is acquired by the lens information acquisition means (for example). For example, the lens information acquisition mode) is switched. For example, the measurement switching means switches between the first mode and the second mode based on the instruction signal for switching between the first mode and the second mode. As an example, the measurement switching means may switch between the first mode and the second mode based on the instruction signal input by the operator operating the operating means. Further, as an example, the measurement switching means may switch between the first mode and the second mode based on the instruction signal output based on the detection result of the detector. For example, in this case, the measurement switching means may switch between the first mode and the second mode based on the instruction signal output by acquiring the optical characteristics of the spectacle lens based on the detection result of the detector. good. Further, for example, in this case, the measurement switching means determines the type of the spectacle lens based on the detection result of the detector, and the first mode and the second mode are based on the instruction signal output based on the determination result. You may switch between. Thereby, an appropriate mode can be applied according to the spectacle lens, and the optical characteristics of the spectacle lens and the lens information can be easily acquired.

The present disclosure can be applied to a spectacle lens measuring device provided with a measuring optical system (for example, a measuring optical system 20) for measuring the optical characteristics of the spectacle lens. As an example, the optical characteristics of the spectacle lens are measured and the peripheral edge of the spectacle lens is processed by projecting the measured luminous flux from the light source toward the spectacle lens and detecting the measured luminous flux passing through the spectacle lens with a detector. The cup used for this may be applied to a cup mounting device to be mounted based on the measurement result.

The present disclosure is not limited to the apparatus described in the present embodiment. For example, 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) of the system or device reads the program. It is also possible to do it.

<Example>
An embodiment of the spectacle lens measuring device (hereinafter, measuring device) in the present embodiment will be described. 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 optical characteristics of the lens LE, the distribution of the optical characteristics of the lens LE, the hidden mark image 65 of the lens LE, etc.). 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, change of index interval, start of measurement, mode switching, 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 in the front-rear direction (that is, the direction in which the temple FT of the spectacles F extends) when the spectacles F are worn. For example, the front support portion 12 supports the bridge FB of the spectacles F. The front support portion 12 is not limited to this embodiment, and may support the rim of the spectacles F as an example. The rear support portion 13 supports a portion rearward from the center in the front-rear direction in the state where the spectacles F are worn. For example, the rear support portion 13 supports the temple FT of the spectacles F. The rear support portion 13 is not limited to this embodiment, and may support the modern FM of the spectacles F 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 spectacles F facing upward and the lower end of the rim of the spectacles F 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 spectacles F in the state where the spectacles F is worn can be adjusted. Further, for example, by moving at least one of the front support portion 12 and the rear support portion 13 in the vertical direction, the rear surface of the lens LE of the spectacles F and the bottom surface of the positioning pin 11 are made parallel (substantially parallel). can do.

<Lens measurement unit>
The lens measuring unit is used to measure the optical characteristics of the lens LE framed in the spectacle F. Further, the lens measuring unit is used to detect information different from the optical characteristics of the lens LE framed in the spectacles F. For example, the lens measuring unit includes a measuring optical system 20.

In this embodiment, in the measurement optical system 20, the light source 21 that serves both as a light source for irradiating the left lens LEl of the spectacles F with the measurement luminous flux and a light source for irradiating the right lens LEr of the spectacles F with the measurement luminous flux. An example is given of a configuration using. Further, in the present embodiment, in the measurement optical system 20, in order to detect the image sensor for detecting the measurement light beam radiated to the left lens LEl of the spectacle F and the measurement light beam radiated to the right lens LEr of the spectacle F. As an example, a configuration using an image sensor 27 that also serves as the image sensor of the above will be given. The measurement optical system 20 is not limited to such a configuration, and various configurations can be used. For example, the measurement optical system 20 includes a light source 21, a half mirror 22, a collimator lens 23, a transmissive display 24, a retroreflective member 25, an image pickup element 27, and the like.

The light source 21 irradiates the measured luminous flux toward the lens LE of the spectacles F. The collimator lens 23 shapes the measured luminous flux from the light source 21 so as to be parallel (substantially parallel) to the optical axis N1.

The transmissive display 24 is a display having a high transmittance capable of transmitting the measured luminous flux from the light source 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, when the measured luminous flux from the light source 21 passes through the transmissive display 24, the index pattern 30 is formed on the measured luminous flux. For example, if the transmissive display 24 is hidden, the measured luminous flux from the light source 21 passes through the transmissive display 24, and the index pattern 30 is not formed on the measured luminous flux.

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 retroreflective member 25 reflects the measured luminous flux from the light source 21 in the same (substantially the same) direction as the incident direction, and illuminates the lens LE of the spectacle F from the rear surface. The retroreflective member 25 may be rotated at high speed by a drive mechanism 26 (for example, a motor or the like). Thereby, the reflection unevenness caused by the variation in the distribution of the glass globules (not shown), the reflective film (not shown), etc. of the retroreflective member 25 can be made uniform.

The image sensor 27 captures the reflected luminous flux in which the measured luminous flux from the light source 21 is reflected by the retroreflective member 25. The focus of the image sensor 27 is focused on the vicinity of the front surface of the lens LE of the spectacles F. Therefore, for example, a hidden mark formed on the lens LE of the spectacles F is imaged in a substantially focused state.

For example, the measured luminous flux from the light source 21 passes through the half mirror 22, is converted into a parallel luminous flux by the collimator lens 23, and reaches the lens LE of the spectacles F. Subsequently, when the measured luminous flux passes through the lens LE, it is converged or diverged by the refractive power of the lens LE, passes through the transmissive display 24, and reaches the retroreflective member 25. Further, the measured luminous flux is reflected by the retroreflective member 25, passes through the transmissive display 24, the lens LE, and the collimator lens 23 again, is reflected by the half mirror 22, and reaches the image pickup element 27. 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 the right region 33a on the side where the left lens LEl of the spectacles F is arranged and the left region 33b on the side where the right lens LEr of the spectacles F is arranged. Will be done. 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 this 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.

The first transmissive display 24a expresses the first index pattern 30a formed by the plurality of indexes 31 by displaying the plurality of indexes 31. As an example, as shown in FIG. 3A, it is possible to express the first index pattern 30a in which the distance between the plurality of indexes 31 is the distance S1. Further, as an example, as shown in FIG. 3B, it is possible to express the first index pattern 30a in which the distance between the plurality of indexes 31 is a distance S2 shorter than the distance S1. Further, as an example, as shown in FIG. 3C, it is possible to express the first index pattern 30a in which the distance between the plurality of indexes 31 is a distance S3 longer than the distance S1. For example, the display and non-display of the plurality of indexes 31 are controlled by the control unit 70 described later.

In the first transmissive display 24a, one index 31 is arranged at equal intervals as a display unit (segment), and the first index 31 is formed by a plurality of indexes 31 depending on whether or not a voltage is applied to each segment. The index pattern 30a may be expressed. In other words, the first transmissive display 24a may represent the first index pattern 30a formed by the plurality of indexes 31 by the segment display. For example, when a voltage is applied to the segment, the index 31 is displayed. For example, when no voltage is applied to the segment or when the application of voltage to the segment is stopped, the index 31 is hidden. For example, each index 31 may be formed by printing.

For example, if a voltage is applied to all the segments provided in the first transmissive display 24a, the index 31 is displayed in all the segments. In this case, the first index pattern 30a can be expressed in which the distance between the plurality of indexes 31 is a predetermined distance (that is, the shortest distance that can be represented by the plurality of indexes 31). Further, if a voltage is applied to a specific segment provided in the first transmissive display 24a, the index 31 is displayed only in the specific segment. In this case, as an example, the first index pattern 30a can be expressed in which a voltage is applied to every other segment and the distance between the plurality of indexes 31 is longer than the shortest distance described above. Of course, it is also possible to express the first index pattern 30a in which a voltage is applied to segments such as every two, three, four, etc. so that the distance between the plurality of indexes 31 is longer.

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.

However, 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 so that at least a part thereof has a different pattern. May be good. 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 may be configured to be different. 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 may be configured to be different. Further, the number of indexes 31 in the first index pattern 30a and the number of indexes 31 in the second index pattern 30b may be configured to be different.

<Index pattern image>
For example, when the measured luminous flux from the light source 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 FIGS. 4 and 5, the case where the lens LE of the spectacles F is a minus lens is taken as an example, and the captured image of the spectacles F with respect to 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 light source 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 light source 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.

In this embodiment, 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 light source 21 is formed in the shape of the first index pattern 30a, and the measured luminous flux from the light source 21 is refracted by the lens LE. It is refracted by force and converges. 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, the 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 light source 21 is formed in the shape of the second index pattern 30b, and the measured luminous flux from the light source 21 is the lens LE. It is refracted by the refractive power of and converges. 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 spectacles F is a minus lens, but if the lens LE is a plus lens, the measured luminous flux from the light source 21 is refracted by the refractive power of the lens LE and diverged. 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, the control unit 70 includes a monitor 4, a light source 21, a drive mechanism 26, an image sensor 27, a first transmissive display 24a, a second transmissive display 24b, a non-volatile memory 75 (hereinafter, memory 75), and the like. Is connected.

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 wearer's spectacles F and places the spectacles F on the spectacle support unit 10. Further, the operator moves at least one of the front support portion 12, the rear support portion 13, and the positioning pin 11 to complete the alignment between the spectacles F and the measurement optical system 20.

Subsequently, the operator has either an optical characteristic measurement mode for acquiring the optical characteristics of the lens LE of the spectacles F or a lens information acquisition mode for acquiring lens information different from the optical characteristics. To set. The operator operates the monitor 4 to select a mode setting button (not shown). The control unit 70 sets either the optical characteristic measurement mode or the lens information acquisition mode according to the input signal from the monitor 4.

<Acquisition of optical characteristics of lens>
Hereinafter, the optical characteristic measurement mode will be described in detail. In the optical characteristic measurement mode, the first transmissive display 24a and the second transmissive display 24b are displayed, and the first index pattern 30a and the second index pattern 30b are projected onto the lens LE to project the optical characteristics of the lens LE. Is obtained. In this embodiment, when the first transmissive display 24a is displayed, the second transmissive display 24b is hidden, and when the first transmissive display 24a is hidden, the second transmissive display 24b is hidden. Is displayed, and the first index pattern 30a and the second index pattern 30b are projected onto the lens LE in order to acquire the optical characteristics of the lens LE.

When the optical characteristic measurement mode is set, the control unit 70 turns on the light source 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. The measured luminous flux from the light source 21 is diverged, shaped in parallel by the collimator lens 23, and simultaneously irradiated to the left lens LEl and the right lens LEr. Further, the measured luminous flux from the light source 21 is refracted by each of the left lens LEl and the right lens LEr, and is formed in the shape of the first index pattern 30a by passing through the first transmissive display 24a, and is formed into the shape of the first index pattern 30a. Is reflected in the original direction by the retroreflective member 25 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. As a result, the measured luminous flux from the light source 21 is refracted by each of the left lens LEl and the right lens LEr, passes through the first transmissive display 24a, and passes through the second transmissive display 24b, whereby the second index pattern 30b is passed. It is formed in a shape, is reflected in the original direction by the retroreflective member 25, 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 M1 in the memory 75.

The control unit 70 acquires the optical characteristics of the left lens LEl and the right lens LEr based on the measurement image M1 and the measurement image M2. For example, the control unit 70 determines the optical characteristics of the left lens LEl and the right lens LEr based on the amount of change in the interval between the index images forming the first index pattern image 41 and the second index pattern image 51. To get.

FIG. 7 is a schematic view showing the measured luminous flux from the light source 21. For example, the measured luminous flux (light ray R1) from the light source 21 is refracted by passing through the position of the point Q1 on the lens LE. The position of the point Q1 in the lens LE in the XY direction is the pixel position of the predetermined index image in the reference image B1 (for example, the pixel position of the point P1) and the pixel position of the predetermined index image in the reference image B2 (for example). , Pixel position of point P2), it can be obtained based on either the reference image B1 or the reference image B2.

The control unit 70 detects where in the measurement image M1 the index image of the reference image B1 in the reference state has moved to the measurement state when the glasses F are placed. For example, the control unit 70 detects the pixel position of each index image forming the first index pattern image 41 for the measurement image M1. Further, for example, the control unit 70 compares the pixel position of each index image in the measurement image M1 with the pixel position of each index image in the reference image B1. Thereby, for example, it is detected that the light ray R1 has passed through the first transmissive display 24a and the point P1 of the reference image B1 has been moved to the point P1'of the measurement image M1.

Similarly, the control unit 70 detects where the index image of the reference image B2 in the reference state has moved to the measurement image M2 when the glasses F are placed and the measurement state is reached. For example, the control unit 70 detects the pixel position of each index image forming 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. Thereby, for example, it is detected that the light ray R1 has passed through the second transmissive display 24b and the point P2 of the reference image B2 has been moved to the point P2'of the measurement image M2.

Next, the control unit 70 calculates the refraction angle θ in which the light ray R1 from the light source 21 is refracted by the lens LE. For example, the refraction angle θ of the light ray R1 is the distance ΔD from the first transmissive display 24a to the second transmissive display 24b and the position of the point P1'in the XY direction in which the light ray R1 has passed through the first transmissive display 24a. , The position of the point P2'in the XY direction in which the light ray R1 has passed through the second transmissive display 24b, can be calculated from a trigonometric function using.

The control unit 70 is refracted by passing the measured luminous flux from the light source 21 through at least two points on the lens LE (in this embodiment, two points, a point Q1 and a point Q2 different from the point Q1). Each refraction angle (that is, angle θ1 and angle θ2) is calculated as described above. Further, the control unit 70 calculates the position of the focal length f of the lens LE and the position of the optical center O of the lens LE based on the positions of at least two points on the lens LE. For example, the position of the focal length f of the lens LE and the position of the optical center O of the lens LE can be obtained by the following mathematical formulas.

The position of the optical center O of the lens LE can also be obtained by using the position of the point Q2 at which the light ray R2 passes through the lens LE and the refraction angle θ2 at which the light ray R2 is refracted by the lens LE. ..

FIG. 8 is a diagram showing the meridian direction of the lens LE. The control unit 70 sets arbitrary two points (points C1 and C2 in FIG. 8) at positions separated by a predetermined distance in a predetermined meridian direction from the position of the optical center O of the lens LE. For example, the control unit 70 sets a predetermined meridian direction for each predetermined angle α. That is, if the predetermined angle α is 45 degrees, the meridian directions are set to 0 degrees, 45 degrees, 90 degrees, ..., 315 degrees, respectively. Further, for example, the control unit 70 sets a predetermined distance so that the distance from the optical center O to the point C1 is the same in each meridian direction. Further, for example, the control unit 70 sets a predetermined distance so that the distance from the optical center O to the point C2 is the same in each meridian direction.

Subsequently, the control unit 70 calculates the position of the focal length f in each meridian direction from arbitrary two points in each meridian direction, and obtains the refractive power E of the lens LE in each meridian direction. The refractive power E of the lens LE is expressed as the reciprocal of the focal length f. Further, the control unit 70 creates a graph in which the refractive power E of the lens LE is plotted on the vertical axis and a predetermined angle α is plotted on the horizontal axis, and an approximate curve using the least squares method is obtained. For example, such an approximate curve has the following formula. Note that a, b, and c in the equation are constants.

The control unit 70 acquires the optical characteristics of the lens LE (for example, spherical power, cylindrical power, astigmatic axis angle, etc.) based on the approximate curve. Further, the control unit 70 causes the monitor 4 to display the optical characteristics of the lens LE.

Even if the control unit 70 acquires the distribution of the optical characteristics of the lens LE by repeating the above-mentioned calculation of the refraction angle and the refractive power of the light beam at a plurality of positions other than the position of the optical center O of the lens LE. good. The control unit 70 may display a map image showing the distribution of the optical characteristics of the lens LE on the monitor 4. For example, the map image may be presented together with the image of the spectacle frame by superimposing the left lens image and the right lens image 60 on the measurement image M1 or the measurement image M2. By confirming this information, the operator can grasp the optical characteristics of the lens LE and the distribution of the optical characteristics of the lens LE.

<Acquisition of lens information of lens>
Hereinafter, the lens information acquisition mode will be described in detail. In the lens information acquisition mode, the lens information of the lens LE is acquired by hiding the first transmissive display 24a and the second transmissive display 24b. Here, as the lens information of the lens LE, a case where a hidden mark of the lens LE is detected will be taken as an example.

When the lens information acquisition mode is set, the control unit 70 turns on the light source 21. Further, the control unit 70 hides the first transmissive display 24a and the second transmissive display 24b. Further, the control unit 70 drives the drive mechanism 26 to rotate the retroreflective member 25 at high speed. The measured luminous flux from the light source 21 is diverged, shaped in parallel by the collimator lens 23, and simultaneously irradiated to the left lens LEl and the right lens LEr. Further, the measured luminous flux from the light source 21 is refracted by each of the left lens LEl and the right lens LEr, passes through the first transmissive display 24a and the second transmissive display 24b, and returns to the original direction by the retroreflective member 25. It is reflected and reaches the image pickup element 27. The control unit 70 processes an electric signal based on the image pickup result of the image pickup device 27 and acquires the measurement image M3.

FIG. 9 is an example of the measurement image M3. For example, the measurement image M3 is acquired as an image including a left lens image and a right lens image 60. In this embodiment, the measured luminous flux from the light source 21 is reflected by the retroreflective member 25 to illuminate the rear surfaces of the left lens LEl and the right lens LEr. Therefore, it is possible to obtain a measurement image M3 having high contrast and clearly showing a lens image (left lens image and right lens image 60), a hidden mark image 65 described later, and the like.

The control unit 70 detects an edge from the rising and falling edges of the brightness in the measurement image M3, and detects the hidden mark image 65. Further, the control unit 70 causes the monitor 4 to display the hidden mark image 65 of the lens LE. By confirming the hidden mark image 65, the operator can grasp the refractive index, the addition power, the progressive band length, and the like of the lens LE.

In this embodiment, the configuration in which the operator manually sets either the optical characteristic measurement mode or the lens information acquisition mode has been described as an example, but the present invention is not limited to this. Of course, the control unit 70 may be configured to automatically set either the optical characteristic measurement mode or the lens information acquisition mode. As an example, the control unit 70 may set the lens information acquisition mode based on the type of the lens LE.

The control unit 70 acquires the measurement image M1 including the first index pattern image 41, and determines the type of the lens LE based on the change in the interval between the index images forming the first index pattern image 41. For example, when the lens LE is a spherical lens (minus lens or plus lens) or an aspherical lens, the interval between each index image forming the first index pattern image 41 is enlarged or reduced at a constant rate. Therefore, the control unit 70 determines that the lens LE is a spherical lens or an aspherical lens when the distance K1 between the index images detected in the measurement image M1 is equidistant (substantially equidistant). can. Further, for example, when the lens LE is a progressive lens, the interval between the index images forming the first index pattern image 41 becomes narrower from a far point to a near point according to the refractive power of the progressive band. Therefore, the control unit 70 can determine that the lens LE is a progressive lens when the distance K1 of the interval between the index images detected in the measurement image M1 gradually becomes narrower (or wider). For example, when the control unit 70 determines that the lens LE is a progressive lens, the control unit 70 may set the lens information acquisition mode to detect the hidden mark image 65 of the lens LE.

<Change of index interval>
When acquiring the optical characteristics of the lens LE, the interval between the index images forming the index pattern image changes greatly depending on the refractive power of the lens LE. In particular, the higher the altitude of the lens LE, the stronger the refractive power of the lens LE, so that the interval between the index images changes significantly.

As an example, as the lens LE is a minus lens and has an altitude number, each index image is reduced to a circular shape, and the interval between the index images becomes narrower. In this case, in the measurement image, adjacent index images may overlap or adjacent index images may intersect, making it difficult to distinguish them from each other. For example, when the optical characteristics of the lens LE are measured in such a state, it is not possible to accurately obtain the position information that the measured luminous flux from the light source passes through the transmissive display, and it is difficult to maintain a constant measurement accuracy.

Further, as an example, as the lens LE is a plus lens and has an altitude number, each index image is enlarged in a circular shape and the interval between the index images becomes wider. In this case, a sufficient number of index images may not be obtained in the measured image. For example, when the optical characteristics of the lens LE are measured in such a state, the position information that the measured luminous flux from the light source passes through the transmissive display is insufficient, and it is difficult to maintain a constant measurement accuracy.

Therefore, in this embodiment, the interval between the index images in the measurement image is detected, and the application of the voltage to the specific segment provided in the transmissive display is controlled based on the detection result. Thereby, the interval of the index 31 can be changed according to the lens LE, and an appropriate index pattern can be expressed.

Hereinafter, a case where the lens LE of the spectacles F is a minus lens will be taken as an example, and the change of the interval of the index 31 will be described in detail. For example, in this embodiment, the control unit 70 displays a plurality of indexes 31 on the first transmissive display and the second transmissive display at predetermined intervals, and the plurality of indexes 31 are wider than the predetermined intervals. One of the wide-interval modes displayed on the first transmissive display and the second transmissive display at intervals is automatically set.

<Normal mode>
Hereinafter, the normal mode will be described in detail. When measuring the optical characteristics of the lens LE, the control unit 70 first sets the normal mode. For example, in the normal mode, a voltage is applied to every other segment displaying the plurality of indexes 31, and the interval between the plurality of indexes 31 is set to a predetermined distance S1 (FIG. 3 (FIG. 3). a)) is displayed on the first transmissive display 24a. At this time, the measurement image M1 including the first index pattern image 41 in which the interval between the index images (hereinafter, the first index image) is reduced by the refractive power of the lens LE is acquired. For example, the control unit 70 analyzes the measurement image M1 to detect the pixel position of the first index image, and based on the pixel position of the adjacent first index image, the distance K1 of the interval of the first index image (FIG. 4 (b)) is calculated.

The control unit 70 determines whether or not the distance K1 of the interval of the first index image exceeds the distance set as a predetermined threshold value. For example, the control unit 70 determines that the distance K1 is less than the threshold value when the distance K1 of the interval of the first index image is longer than the predetermined threshold value. Further, the control unit 70 determines that the distance K1 exceeds the threshold value when the distance K1 at the interval of the first index image is shorter than the predetermined threshold value. The predetermined threshold value may be stored in the memory 75 in advance by an experiment, a simulation, or the like.

When the control unit 70 determines that the distance K1 of the interval of the first index image is less than the threshold value, the control unit 70 stores the measurement image M1 including the first index pattern image 41 in which the interval of the first index image is the distance K1 in the memory 75. Remember. Subsequently, the control unit 70 applies a voltage to every other segment displaying the plurality of indexes 31, and sets the interval between the plurality of indexes 31 as a predetermined distance S1 in the second index pattern 30b. It is displayed on the second transmissive display 24b. As a result, the measurement image M2 including the second index pattern image 51 in which the distance between the index images (hereinafter, the second index image) is the distance K2 is acquired and stored in the memory 75. The control unit 70 acquires the optical characteristics of the lens LE based on the measurement image M1 and the measurement image M2.

<Wide interval mode>
Hereinafter, the wide interval mode will be described in detail. For example, the wide interval mode is set when it is determined in the above-mentioned normal mode that the distance K1 of the interval of the first index image exceeds the threshold value. For example, in the wide interval mode, the first index pattern 30a is a first index pattern 30a in which a voltage is applied to all the segments displaying the plurality of indexes 31 and the distance between the plurality of indexes 31 is longer than the predetermined distance S1. 1 Displayed on the transmissive display 24a.

For example, when the control unit 70 determines that the distance K1 of the interval between the first index images exceeds the threshold value, the control unit 70 changes the application of the voltage to each segment displaying the plurality of indexes 31 on the first transmissive display 24a. , A voltage is applied to all the segments displaying the plurality of indicators 31. As a result, for example, the first index pattern 30a (see FIG. 3C) in which the distance between the plurality of indexes 31 is a distance S3 longer than the predetermined distance S1 is displayed on the first transmissive display 24a. Become. At this time, due to the refractive power of the lens LE, the measurement image M1 including the first index pattern image 41 in which the distance between the first index images is longer than the distance K1 is acquired. The control unit 70 stores the measurement image M1 in the memory 75.

Subsequently, the control unit 70 applies a voltage to all the segments displaying the plurality of indexes 31, and sets the interval between the plurality of indexes 31 to a distance S3 longer than the predetermined distance S1 in the second index pattern 30b. , Displayed on the second transmissive display 24b. As a result, the measurement image M2 including the second index pattern image 51 in which the distance between the second index images is longer than the distance K2 is acquired. The control unit 70 stores the measurement image M2 in the memory 75.

In this way, the control unit 70 acquires an appropriate measurement image M1 and measurement image M2 by changing the interval of the plurality of indexes 31 according to the lens LE, and based on these measurement images, the lens LE. To acquire the optical characteristics of.

In the above description, the configuration in which the wide interval mode is set when it is determined that the distance K1 of the interval of the first index image exceeds the threshold value has been described as an example, but the present invention is not limited to this. For example, the wide interval mode may be set when the distance K1 of the interval between the first index images is not detected due to the overlap of the first index images or the like.

Further, in the above, the first index pattern 30a in which the distance between the plurality of indexes 31 is a predetermined distance S1 is displayed on the first transmissive display 24a, and the distance K1 of the distance between the first index images detected at this time is The configuration in which the normal mode is automatically switched to the wide interval mode based on whether or not the threshold value has been exceeded has been described as an example, but the present invention is not limited to this. Of course, the second index pattern 30b in which the distance between the plurality of indexes 31 is a predetermined distance S1 is displayed on the second transmissive display 24b, and the distance K2 of the distance between the second index images detected at this time is set in advance. The configuration may be such that the normal mode is automatically switched to the wide interval mode based on whether or not the threshold value is exceeded. For example, if the measurement image M1 is acquired in the normal mode and then the measurement image M2 is acquired in the wide interval mode, the measurement image M1 may be acquired again in the wide interval mode.

As described above, for example, the spectacle lens measuring device in the present embodiment is a transmissive display capable of transmitting a measured light beam from a light source and displaying an index pattern formed by arranging a plurality of indexes. By displaying the index pattern on the transmissive display, the optical characteristics of the spectacle lens are acquired, and by not displaying at least a part of the index pattern on the transmissive display, the lens information of the spectacle lens (hidden as an example). Mark information) is acquired. Thereby, for example, it is possible to acquire the optical characteristics and the lens information of the spectacle lens with a simple configuration without providing an optical system for obtaining the optical characteristics or the lens information for each or requiring complicated control. Can be done.

Further, for example, the spectacle lens measuring device in the present embodiment is a first transmissive display capable of displaying a first index pattern and a second transmissive display capable of displaying a second index pattern, and is a first transmissive type. It has a second transmissive display arranged at a position different from that of the display in the optical axis direction, and the measured light beam transmitted through the first transmissive display and further transmitted through the second transmissive display is detected by a detector. To detect. For example, by providing the transmissive display at different positions in the optical axis direction, the optical characteristics of the spectacle lens can be accurately adjusted with a simple configuration without providing a mechanism for moving the spectacle lens or the transmissive display in the optical axis direction. Can be obtained. More specifically, the refraction angle obtained by refracting the measured luminous flux from the light source by the refractive power of the spectacle lens can be obtained, and the optical characteristics of the spectacle lens can be accurately obtained based on this.

Further, for example, in the spectacle lens measuring device of the present embodiment, the first index pattern is displayed in the first transmissive display capable of displaying the first index pattern and the second transmissive display capable of displaying the second index pattern. Is displayed, at least a part of the second index pattern is hidden, and when at least a part of the first index pattern is hidden, the second index pattern is displayed. As a result, the first index pattern image and the second index pattern image do not overlap, and the position of each index pattern image (index image) can be accurately detected, so that the optical characteristics can be measured accurately.

Further, for example, the spectacle lens measuring device in the present embodiment reflects the spectacle lens from the light source toward the spectacle lens and reflects the measured light beam passing through the spectacle lens and the transmissive display in the incident direction to return the spectacle lens. A retroreflective member capable of illuminating is provided, and the reflected light beam reflected by the retroreflective member from the light source is detected by a detector. Thereby, the spectacle lens image and the index pattern image (index image) projected on the spectacle lens can be obtained in a state of high contrast, and the detection accuracy of these images can be improved.

Further, for example, the spectacle lens measuring device in the present embodiment switches between a first mode for acquiring the optical characteristics of the spectacle lens and a second mode for acquiring the lens information of the spectacle lens. Therefore, for example, an appropriate mode can be applied according to the spectacle lens, and the optical characteristics of the spectacle lens and the lens information can be easily acquired.

Further, the spectacle lens measuring device in the present embodiment irradiates the measured luminous flux from the light source toward both the left lens and the right lens of the spectacle lens, and the measured luminous flux passing through the left lens and the transmissive display and the right lens. And the measured luminous flux via the transmissive display are detected by the detector. Therefore, the measurement optical system has a simple configuration, and the optical characteristics of the spectacle lens and the lens information can be acquired by simple control. For example, in the case of a configuration in which the measurement light beam is simultaneously irradiated to both the left lens and the right lens of the spectacle lens, it is necessary in the configuration in which the measurement light beam is sequentially irradiated to the left lens and the right lens. It is not necessary to provide a mechanism for moving the spectacle lens. Therefore, the optical characteristics of the spectacle lens and the lens information can be acquired by the measurement optical system with a simpler configuration and simpler control.

Further, for example, the spectacle lens measuring device in the present embodiment allows the interval between a plurality of indexes to be arbitrarily set, and displays an index pattern formed by arranging a plurality of indexes having an arbitrary interval on a transmissive display. To display. As a result, an appropriate index pattern image corresponding to the spectacle lens can be obtained, and the optical characteristics can be accurately acquired. Further, the optical characteristics can be accurately acquired even when measuring a wide range of optical characteristics of the spectacle lens or when acquiring the distribution of the optical characteristics of the spectacle lens.

Further, for example, the spectacle lens measuring device in the present embodiment sets the interval of the index forming the index pattern based on the detection result of the detector that detects the measured luminous flux from the light source. As a result, the interval between the indexes is automatically set, and an appropriate index pattern image corresponding to the spectacle lens can be easily obtained.

Further, for example, the spectacle lens measuring device in the present embodiment detects an index pattern image in which an index is projected on the spectacle lens, and based on the detection result of the index pattern image, sets an interval between a plurality of indexes forming the index pattern. Set. For example, this makes it possible to appropriately set the index spacing according to the spectacle lens based on the spacing and shape of the plurality of index images in the index pattern image projected on the spectacle lens. Further, for example, by this, an appropriate index pattern image corresponding to the spectacle lens can be acquired, and the optical characteristics of the spectacle lens can be accurately acquired.

Further, for example, the spectacle lens measuring device in the present embodiment sets an interval between a plurality of indexes forming an index pattern based on whether or not the detection result of the detector exceeds a predetermined threshold value. As a result, the intervals between the plurality of indexes are automatically switched according to the spectacle lens, an appropriate index pattern image corresponding to the spectacle lens can be easily acquired, and the optical characteristics of the spectacle lens can be accurately acquired. It should be noted that such setting of the index interval can be particularly effectively used in a fully automated device that automatically performs from the start to the completion of the measurement of the optical characteristics after the spectacle lens is placed.

Further, for example, in the spectacle lens measuring device of the present embodiment, it is possible to set a first interval of a plurality of indexes forming an index pattern and a second interval different from the first interval of the plurality of indexes. Therefore, it is possible to use at least two index intervals properly in correspondence with various spectacle lenses.

Further, for example, the spectacle lens measuring device in the present embodiment includes a first index pattern formed by a plurality of indexes having a first interval, a second index pattern formed by a plurality of indexes having a second interval, and the like. Is displayed on the transmissive display according to the switched mode. Therefore, for example, by projecting an index pattern having a predetermined index interval, an spectacle lens capable of accurately acquiring optical characteristics, and by projecting an index pattern having a predetermined index interval, optical It can be applied to any spectacle lens, which is difficult to acquire characteristics accurately.

<Example of transformation>
In this embodiment, a configuration in which the measurement optical system 20 is used to measure the optical characteristics of the lens LE framed in the spectacle frame and detect the hidden mark image 65 will be described as an example. However, it is not limited to this. For example, in this embodiment, the measurement optical system 20 may be used to measure the optical characteristics of the raw lens that is not framed in the spectacle frame and detect the hidden mark image 65. .. In this case, as the lens information of the raw lens, in addition to the hidden mark image formed on the raw lens, the mark points on the raw lens, the print mark on the raw lens, and the like are detected. You may.

In this embodiment, the lens LE is used with the measurement optical system 20 including two transmissive displays (first transmissive display 24a and second transmissive display 24b) arranged at different positions in the optical axis direction. The configuration for acquiring the optical characteristics of the above has been described as an example, but the present invention is not limited to this. For example, in this embodiment, the optical characteristics of the lens LE may be acquired by using a measurement optical system in which one transmissive display is arranged at a predetermined position in the optical axis direction.

FIG. 10 is an example of a measurement optical system including one transmissive display. When the measurement optical system includes one transmissive display, a moving mechanism 28 (for example, a motor or the like) for moving the transmissive display 24'in the optical axis N1 direction may be provided. As a result, two measured images having different distances from the lens LE to the transmissive display can be obtained as in the case of using the two transmissive displays.

For example, the control unit 70 causes the transmissive display 24'to display a predetermined index pattern, and arranges the transmissive display 24'at the initial position T1 near the lens LE. In this state, the measurement image at the initial position T1 including the index pattern image, the left lens image, and the right lens image is acquired. Further, for example, the control unit 70 controls the moving mechanism 28 to move the transmissive display 24'by a distance ΔD while displaying a predetermined index pattern on the transmissive display 24', and causes the transmissive display 24'. It is arranged at the moving position T2 far from the lens LE. In this state, the measurement image at the moving position T2 including the index pattern image, the left lens image, and the right lens image is acquired. Based on these measured images, the control unit 70 obtains the optical characteristics of the lens LE by obtaining the position of the focal length f of the lens LE, the position of the optical center O of the lens LE, the refractive power E of the lens LE, and the like. can do.

In the above, the moving mechanism 28 for moving the transmissive display 24'in the optical axis N1 direction is provided, but a moving mechanism for moving the lens LE in the optical axis N1 direction may be provided. This also provides two measurement images with different distances from the lens LE to the transmissive display, so that the optical characteristics of the lens LE can be acquired based on these measurement images.

Further, in the above description, the moving mechanism 28 for moving the transmissive display 24'in the direction of the optical axis N1 is provided, but the transmissive display 24'may not be moved. In this case, the measured light beam from the light source 21 is a point in the XY direction that has passed through the lens LE, a point in the XY direction that has passed through the transmissive display 24', and a distance from the lens LE to the transmissive display 24'. Based on this, the optical characteristics of the lens LE can be acquired. For example, the point P1'of the first transmissive display 24a in FIG. 7 is replaced with the point Q1 of the lens LE, and the distance ΔD from the first transmissive display 24a to the second transmissive display 24b is changed from the lens LE to the second transmissive display. The optical characteristics of the lens LE can be obtained by substituting the distance up to 24b and performing the same processing.

In this embodiment, the configuration in which the optical path in which the measured luminous flux from the light source 21 is guided to the left lens LEl and the right lens LEr is used as a common optical path has been described as an example, but the present invention is not limited to this. For example, in this embodiment, the optical path in which the measured luminous flux from the light source is guided to the left lens LEl and the optical path in which the measured luminous flux from the light source is guided to the right lens LEr may be different optical paths. ..

FIG. 11 shows an example of a configuration in which the optical path in which the measured luminous flux from the light source is guided by the left lens LEl and the optical path guided by the right lens LEr are different optical paths. The measurement optical system may include a pair of left and right light sources (first light source 211 and second light source 212) and a pair of left and right image pickup elements (first image pickup element 271 and second image pickup element 272). For example, the measured luminous flux from the first light source 211 is applied to the left lens LEl, and the measured luminous flux reflected by the retroreflective member 25 via the left lens LEl and the transmissive display 24 is transmitted to the first imaging element 271. Have an image taken. Further, for example, the measured luminous flux from the second light source 212 is applied to the right lens LEr, and the measured luminous flux reflected by the retroreflective member 25 via the right lens LEr and the transmissive display 24 is transferred to the second imaging element. 272 is imaged.

For example, in the case where a pair of left and right light sources and a pair of left and right image pickup elements are provided in this way, at least one of the collimator lens, the transmissive display 24, the retroreflective member 25, and the like has the left and right optical paths. It may be arranged in each of them, or it may be shared in the left and right optical paths. As an example, as shown in FIG. 11, even if collimator lenses (collimator lens 231 and collimator lens 232) are arranged in the left and right optical paths, and the transmissive display 24 and the retroreflective member 25 are also used in the left and right optical paths. good.

For example, by providing a pair of left and right light sources and a pair of left and right collimator lenses, the measured luminous flux from the light source 211 passes near the center of the collimator lens 231 and the measured luminous flux from the light source 212 is near the center of the collimator lens 232. Pass through. Therefore, it is possible to suppress the aberration generated when the measured luminous flux from the light source passes through the collimator lens and reduce the influence on the measurement accuracy. Further, since a collimator lens having a small diameter can be used, the measurement optical system can be constructed at low cost.

For example, by providing a pair of left and right image pickup elements, the number of pixels of the detector can be effectively used for each of the left lens LEl and the right lens LEr, and the position of the index pattern image (index image) can be more accurately used. It can be detected to improve the measurement accuracy of optical characteristics. For example, in the case of a configuration including a pair of left and right image pickup elements, it is not necessary to distinguish between the measured luminous flux via the left lens LEl and the measured luminous flux via the right lens LEr, so that the lens LE can be controlled more easily. Optical characteristics and lens information can be obtained.

In the above description, the configuration in which the measurement optical system 20 includes a pair of left and right light sources and a pair of left and right image pickup elements has been described as an example, but the present invention is not limited to this. For example, one light source and a pair of left and right image pickup elements may be provided. For example, in this case, the measured luminous flux emitted from the light source is branched into an optical path for guiding the left lens LEl and an optical path for guiding the right lens LEr by a half mirror or the like, and the measured luminous flux passing through each optical path. May be imaged by the first imaging element 271 and the second imaging element 272. Further, for example, a pair of left and right light sources and one image sensor may be provided. For example, in this case, the measured luminous flux emitted from the light source 211 and guided to the left lens LEl and the measured luminous flux irradiated from the light source 212 and guided to the right lens LEr are combined by a half mirror or the like for imaging. The image may be taken by the element.

In this embodiment, the second transmissive display 24b is hidden when the first transmissive display 24a is displayed, and the second transmissive display 24b is hidden when the first transmissive display 24a is hidden. The configuration for acquiring the optical characteristics of the lens LE by displaying the lens LE has been described as an example, but the present invention is not limited to this. For example, in this embodiment, the optical characteristics of the lens LE may be acquired by displaying both the first transmissive display 24a and the second transmissive display 24b.

In this case, the measured luminous flux from the light source 21 forms the first index pattern 40a by passing through the first transmissive display 24a, and further passes through the second transmissive display 24b to form the second index pattern 40b. Is formed, one measurement image including both the first index pattern image 41 and the second index pattern image 51 is acquired. The index 31 forming the first index pattern 40a and the index 31 forming the second index pattern 40b are set to at least one of a different shape, a different position, and a different number, and the first index pattern in the measurement image is set. The image 41 and the second index pattern image 51 may be easily distinguished from each other.

For example, the control unit 70 displays one of the two transmissive displays and hides the other by detecting the first index pattern image 41 and the second index pattern image 51 from one measurement image, respectively. The measurement image M1 including the first index pattern image 41 and the measurement image M2 including the second index pattern image 51 can be obtained, respectively. Based on these measured images, the control unit 70 obtains the optical characteristics of the lens LE by obtaining the position of the focal length f of the lens LE, the position of the optical center O of the lens LE, the refractive power E of the lens LE, and the like. can do.

Further, in this embodiment, a configuration in which the hidden mark image 65 of the lens LE is detected by hiding both the first transmissive display 24a and the second transmissive display 24b has been described as an example. , Not limited to this. For example, in this embodiment, the hidden mark image 65 of the lens LE may be detected by hiding a part of the first transmissive display 24a and the second transmissive display 24b. In this case, a part of each transmissive display may be hidden so that the first index pattern image 41 and the second index pattern image 51 do not overlap with the hidden mark image 65. As an example, the control unit 70 detects the left lens image and the right lens image 60 from the measurement image, hides the index 31 corresponding to the index image located inside the left lens image and the right lens image 60, and hides the lens LE. The hidden mark image 65 of the lens may be detected.

In this embodiment, the configuration in which the hidden mark image 65 of the lens LE is detected by reflecting the measured luminous flux from the light source 21 by the retroreflective member 25 and illuminating the lens LE has been described as an example. , Not limited to this. For example, in this embodiment, a display is used as a light source, the display is turned on to illuminate the lens LE, and the display is displayed with an irradiation pattern different from the first index pattern 30a and the second index pattern 30b. The hidden mark image 65 of the lens LE may be detected by projecting the irradiation pattern onto the LE.

FIG. 12 is an example of a configuration in which the display 28 is used as the light source. For example, when the display 28 is used as the light source, the light source 28, the first transmissive display 24a, and the second transmissive display 24b are arranged on the rear surface side of the lens LE, and the light source 28 is arranged on the front surface side of the lens LE. The image sensor 27 may be arranged. The measured luminous flux emitted from the display 28 is imaged by the image sensor 27 via the two transmissive displays and the lens LE.

FIG. 13 is an example of the irradiation pattern 80 that can be displayed on the display 28. FIG. 13A is a measurement image M4 when the position of the irradiation pattern 80 displayed on the display 28 is moved. FIG. 13B is a processed image M5 obtained by processing a plurality of captured images. The irradiation pattern 80 may be any irradiation pattern having different brightness and darkness. In FIG. 13, a striped pattern irradiation pattern 80 is taken as an example, but a checkerboard pattern irradiation pattern or the like may be used.

For example, the control unit 70 causes the display 28 to display the irradiation pattern 80, and hides the first transmissive display 24a and the second transmissive display 24b. As a result, the measured luminous flux emitted from the display 28 passes through the two transmissive displays, is refracted by the lens LE, and reaches the image sensor 27. The control unit 70 processes an electric signal based on the image pickup result of the image pickup device 27 and acquires the measurement image M4. For example, the measured luminous flux emitted from the display 28 is scattered by a hidden mark (or a scratch on the lens LE, etc.) formed on the lens LE, and is not imaged by the image sensor 27. Therefore, in the measurement image M4, the hidden mark image 50 is partially observed at the portion where the irradiation pattern 80 and the hidden mark image 50 overlap. For example, the control unit 70 may control the display of the display 28, move the irradiation pattern 80 by a predetermined pixel position, and acquire a plurality of measurement images M4. Further, for example, the control unit 70 may analyze each of the plurality of measurement images M4 to acquire the processed image M5 and detect the entire shape of the hidden mark image 65.

When the display 28 is used as the light source, the lens LE can be illuminated without projecting the irradiation pattern on the lens LE by turning on the display 28 and hiding the irradiation pattern 80. In this state, the display and non-display of the first index pattern 30a on the first transmissive display 24a and the display and non-display of the second index pattern 30b on the second transmissive display 24b are controlled, and each measurement image is controlled. The optical characteristics of the lens LE may be obtained based on the above.

Further, when the display 28 is used as the light source, the second transmissive display 24b and the display 28 can be used in combination. That is, the first index pattern 30a is displayed on the first transmissive display 24a, the measurement image M1 including the first index pattern image 41 is acquired, the second index pattern 30b is displayed on the display 28, and the second index pattern image is displayed. The measurement image M2 including 51 may be acquired. Also from this, the optical characteristics of the lens LE can be obtained.

For example, by using the display 28 as a light source, a lens image and an index pattern image (index image) projected on the lens LE can be obtained in a state of high contrast, and the detection accuracy of these images is improved. be able to. In the configuration in which the lens LE is illuminated by the retroreflective member 25, it is necessary to branch the optical path of the measured luminous flux emitted from the light source 21 to guide the light to the image pickup element 27, and the amount of light is reduced. However, for example, when the lens LE is illuminated by the display 28, the light can be guided to the image sensor 27 without branching the measurement optical path emitted from the display 28, so that the decrease in the amount of light can be suppressed and these images can be detected. The accuracy can be further improved.

In this embodiment, in the first transmissive display 24a and the second transmissive display 24b, the index pattern is set so that the measured luminous flux from the light source 21 is shielded by the index 31 and passes through a region other than the index 31. The display configuration has been described as an example, but the present invention is not limited to this. For example, the index pattern may be displayed so that the measured luminous flux from the light source 21 passes through the index 31 and blocks a region other than the index 31. In this case, dust adhering to the lens LE or the transmissive display, reflection unevenness due to the retroreflective member 25, etc. can be suppressed from being reflected in the index pattern, so that the pixel position of the index image can be detected more accurately. Can be done.

In this embodiment, a transmissive display having polarization characteristics may be used. In this case, the transmissive display may be arranged so that the polarization direction in the lens LE is the Y direction in the measuring device 1. For example, polarized sunglasses allow only polarized light in the vertical direction of the lens (Y direction in the measuring device 1) to pass through, so by setting the transmissive display in this way, it is possible to measure the optical characteristics of polarized sunglasses. However, it is possible to efficiently pass the polarized measurement light beam by passing through the transmissive display.

In this embodiment, the configuration in which the interval of the index 31 in the first transmissive display 24a is changed based on the distance K1 of the interval of the first index image in the measurement image M1 has been described as an example. Not limited. In this embodiment, the interval of the index 31 on the first transmissive display 24a may be changed based on the shape of the first index image on the measurement image M1. For example, the control unit 70 may detect the shape of the first index image by detecting the edge from the rise and fall of the brightness in the measurement image M1.

For example, as the lens LE is a minus lens and has an altitude, the first index image is reduced by the refractive power of the lens LE, so that the number of pixels used by the image sensor 27 to express each first index image is small. Become. Therefore, the first index image in the measurement image M1 becomes coarse and the first index image is deformed. Therefore, when the control unit 70 uses the shape of the first index image in the measurement image M1 to determine whether or not to change the interval of the index 31, and detects that the first index image is deformed, the control unit 70 uses it. The interval of the index 31 may be changed.

In this embodiment, the interval of the index 31 on the first transmissive display 24a is the detection result of the first index image on the measurement image M1 (that is, the interval of the first index image or the shape of the first index image). The configuration to be changed based on the above has been described as an example, but the present invention is not limited to this. In this embodiment, the interval of the index 31 in the first transmissive display 24a may be changed based on the optical characteristics of the lens LE. In this case, the control unit 70 first acquires the measurement image M1 regardless of the interval or shape of the first index image in the measurement image M1, and measures the measurement regardless of the interval or shape of the second index image in the measurement image M2. Image M2 may be acquired. The control unit 70 acquires the optical characteristics of the lens LE based on the measurement image M1 and the measurement image M2. As an example, the refractive power of the lens LE is acquired.

Here, the control unit 70 determines whether or not the refractive power of the lens LE exceeds the refractive power set as a predetermined threshold value in advance. For example, the control unit 70 may determine that the refractive power of the lens LE is less than the predetermined threshold value when the refractive power of the lens LE is smaller than the predetermined threshold value. Further, for example, the control unit 70 may determine that the refractive power of the lens LE exceeds a predetermined threshold value when the refractive power of the lens LE is larger than a predetermined threshold value. For example, when the control unit 70 determines that the refractive index of the lens LE exceeds a predetermined threshold value, the control unit 70 changes the interval of the index 31 between the first transmissive display 24a and the second transmissive display 24b, and measures the distance again. The optical characteristics of the lens LE may be acquired by acquiring the image M1 and the measurement image M2.

For example, as described above, the spectacle lens measuring device in the present embodiment may calculate the refractive power of the spectacle lens and set the interval between a plurality of indexes forming the index pattern based on the calculation result of the refractive power. .. Thereby, the interval of the index according to the refractive power of the spectacle lens can be appropriately set. Further, as a result, an appropriate index pattern image corresponding to the spectacle lens can be acquired, and the optical characteristics of the spectacle lens can be accurately acquired.

Further, in this embodiment, the interval of the index 31 in the first transmissive display 24a may be changed based on the type of the lens LE. In this case, the control unit 70 acquires the measurement image M1 regardless of the interval and shape of the first index image in the measurement image M1. For example, the control unit 70 compares the reference image B1 with the measurement image M1 and determines the type of lens LE based on the change of the first index image in the measurement image M1 with respect to the index image in the reference image B1. do. As an example, the control unit 70 may determine that the lens LE is a minus lens when the first index image in the measurement image M1 is reduced with respect to the index image in the reference image B1. Further, as an example, the control unit 70 may determine that the lens LE is a plus lens when the first index image in the measurement image M1 is enlarged with respect to the index image in the reference image B1.

For example, when the control unit 70 determines that the lens LE is a minus lens, the control unit 70 may change the interval of the index 31 between the first transmissive display 24a and the second transmissive display 24b. For example, the interval of the index 31 between the first transmissive display 24a and the second transmissive display 24b may be changed widely. As a result, the measurement image M1 and the measurement image M2 may be acquired, and the optical characteristics of the lens LE may be acquired. Further, for example, when the control unit 70 determines that the lens LE is a plus lens, the control unit 70 may change the interval of the index 31 between the first transmissive display 24a and the second transmissive display 24b. For example, the interval between the indexes 31 on the first transmissive display 24a and the second transmissive display 24b may be changed to be narrower. As a result, the measurement image M1 and the measurement image M2 may be acquired, and the optical characteristics of the lens LE may be acquired.

For example, as described above, the spectacle lens measuring device in the present embodiment determines whether the spectacle lens is a minus lens or a plus lens, and based on the determination result, sets an interval between a plurality of indexes forming an index pattern. It may be set. Thereby, the interval of the index according to the type of the spectacle lens can be appropriately set. Further, as a result, an appropriate index pattern image corresponding to the spectacle lens can be acquired, and the optical characteristics of the spectacle lens can be accurately acquired.

In this embodiment, a configuration in which a predetermined threshold value for changing the interval of the index 31 in the first transmissive display 24a is provided and the interval of the index 31 is changed when the predetermined threshold value is exceeded is given as an example. Explained, but not limited to this. For example, in this embodiment, the interval of the index 31 is set by using a table or the like in which the imaging result detected by the image sensor and the interval of the index 31 displayed on the first transmissive display 24a are associated with each other. You may change it. That is, the interval of the index 31 may be changed according to the detection result detected by the image sensor. For example, the table may be preset based on the results of experiments and simulations.

In this embodiment, when the lens LE is a minus lens, a configuration for switching between the normal mode and the wide interval mode based on the distance K1 of the interval of the first index image has been described as an example. Not limited to. For example, in this embodiment, when the lens LE is a plus lens, the normal mode and the narrow interval mode may be switched based on the distance K1 of the interval of the first index image. For example, in the narrow interval mode, a voltage is applied to every other segment displaying a plurality of indexes 31, and the interval between the plurality of indexes 31 is set to a distance shorter than a predetermined distance S1. 30a may be displayed on the first transmissive display 24a. Of course, in this embodiment, even if a normal mode, a wide interval mode, and a narrow interval mode are provided and any of these modes is switched and applied based on the distance K1 of the interval of the first index image. good.

1 Eyeglass lens measuring device 10 Eyeglass support unit 20 Measuring optical system 21 Light source 24 Transmissive display 26 Retroreflective member 27 Imaging element 70 Control unit 75 Memory

Claims (10)

A spectacle lens measuring device that measures spectacle lenses.
A light source that irradiates the measurement luminous flux toward the spectacle lens,
A transmissive display that transmits the measured luminous flux from the light source, and a transmissive display capable of displaying an index pattern formed by arranging a plurality of indexes.
A display control means for controlling the display of the index pattern and
A detector that detects the measured luminous flux via the spectacle lens and the transmissive display, and
An optical characteristic acquisition means for acquiring the optical characteristics of the spectacle lens based on the detection result of the detector, and
A lens information acquisition means for acquiring lens information different from the optical characteristics of the spectacle lens based on the detection result of the detector.
With
When the display control means displays the index pattern, the optical characteristic acquisition means acquires the optical characteristics, and the display control means hides at least a part of the index pattern, whereby the lens information. A spectacle lens measuring device, characterized in that the acquisition means acquires the lens information. In the spectacle lens measuring device of claim 1,
The transmissive display is a first transmissive display capable of displaying a first index pattern and a second transmissive display capable of displaying a second index pattern, and the first transmissive display is in the optical axis direction. Has a second transmissive display, which is located at a different position,
The detector is a spectacle lens measuring device that transmits the first transmissive display and further transmits the measured luminous flux that has passed through the second transmissive display. In the spectacle lens measuring device of claim 2,
The display control means controls the display of the first index pattern and the display of the second index pattern, respectively.
When displaying the first index pattern, at least a part of the second index pattern is hidden, and when at least a part of the first index pattern is hidden, the second index pattern is displayed. A spectacle lens measuring device characterized by this. In the spectacle lens measuring device according to any one of claims 1 to 3.
The transmissive display displays a transmissive display for a left lens that displays the index pattern and projects an index pattern image onto the left lens of the spectacle lens, and displays the index pattern on the right lens of the spectacle lens. A spectacle lens measuring device characterized in that it also serves as a transmissive display for a right lens that projects an index pattern image. In the spectacle lens measuring device according to any one of claims 1 to 4.
The light source is a display capable of irradiating the spectacle lens with the measured luminous flux toward the spectacle lens.
The detector is a spectacle lens measuring device, which detects the measured luminous flux from the display. In the spectacle lens measuring device according to any one of claims 1 to 4.
Retrograde that can illuminate the spectacle lens by irradiating the spectacle lens from the light source and reflecting the measured luminous flux that has passed through the spectacle lens and the transmissive display in the incident direction and returning the light beam. Equipped with sex reflective members
The detector is a spectacle lens measuring device, characterized in that the measured luminous flux detects the reflected luminous flux reflected by the retroreflective member. In the spectacle lens measuring device according to any one of claims 1 to 6.
A measurement switching means for switching between a first mode in which the optical characteristics of the spectacle lens are acquired by the optical characteristic acquisition means and a second mode in which the lens information of the spectacle lens is acquired by the lens information acquisition means. A spectacle lens measuring device characterized by being provided. In the spectacle lens measuring device according to any one of claims 1 to 7.
The light source irradiates the measurement light beam toward both the left lens of the spectacle lens and the right lens of the spectacle lens.
The detector detects the measured light beam passing through the left lens of the spectacle lens and the transmissive display, and the measured light beam passing through the right lens of the spectacle lens and the transmissive display. A spectacle lens measuring device characterized by this. In the spectacle lens measuring device of claims 1 to 7,
The light sources are a pair of left and right light sources, a first light source that irradiates the measured luminous flux toward the left lens of the spectacle lens, and a second light source that irradiates the measured luminous flux toward the right lens of the spectacle lens. With a light source,
The detector was irradiated from the first light source and passed through the left lens and the transmissive display, the measured luminous flux, and was irradiated from the second light source and passed through the right lens and the transmissive display. A spectacle lens measuring device characterized by detecting the measured luminous flux. In the spectacle lens measuring device according to any one of claims 1 to 9.
The detectors are a pair of left and right detectors, the first detector for detecting the measured light beam passing through the left lens of the spectacle lens and the transmissive display, the right lens of the spectacle lens, and the detector. A spectacle lens measuring device comprising: a second detector for detecting the measured light beam via a transmissive display.

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