JP6805594B2 - Lens meter and eyeglass measuring device - Google Patents

Description

The present disclosure relates to a lens meter for measuring the optical characteristics of a lens and a spectacle measuring device for measuring an optical center distance (PD) of a spectacle frame.

There is known a lens meter having a measuring optical system that projects a measured luminous flux onto a lens and receives the measured luminous flux transmitted through the lens with a light receiving element to measure optical characteristics such as the refractive index of the lens. Such a lens meter is provided with a PD measuring mechanism (PD measuring means) for measuring PD between the optical center of the left lens and the optical center of the right lens attached to the left and right rims (lens frame) of the spectacle frame. There is something that is. For example, PD is measured by displaying a scale on the screen of the display for the examiner to visually read the position of the stamp point on the lens surface of the left lens and the right lens in the left-right direction, and reading the scale. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2013-134240

When the wearer wears spectacles (spectacle frames), the wearer spreads the temple part of the spectacle frame and wears it on the face. When the spectacle frame is attached to the wearer, the temple portion of the spectacle frame grips the wearer's head, and the reaction force causes the spectacle frame itself to be deformed. As a result, the spectacle frame has a different shape depending on the shape when the spectacle frame is worn by the wearer and the shape before the spectacle frame is worn by the wearer.

However, conventionally, since the PD of the spectacle frame is measured in a state where the spectacle frame is not worn, the PD of the spectacle frame in which the deformation of the spectacle frame is not considered has been acquired. Therefore, when the spectacles are manufactured by processing the spectacle lens using this PD, there is a problem that it is not good when the wearer actually wears the spectacles.

In view of the above-mentioned prior art, it is a technical subject of the present disclosure to provide a lens meter and a spectacle measuring device capable of acquiring a PD in consideration of deformation of the spectacle frame.

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

(1) The lens meter according to the first aspect of the present disclosure is a lens meter including a measurement optical system for measuring the optical characteristics of a lens and a display for displaying the measurement results, and is spectacles worn by the wearer. It is a holding means for holding the spectacle frame in the shape in the wearing state , and positions at least one of the left and right abutting portions that abut on at least a part of the left and right temples of the spectacle frame and the left and right abutting portions. A holding means having a contact portion moving means for moving and setting at least one position of the left and right contact portions to a predetermined position, and for measuring the PD of the spectacle frame held by the holding means. It has a PD measuring means, and is characterized in that the width between the left and right temples is changed to a width based on the predetermined position by bringing the left and right temples into contact with the left and right contact portions. To do.
(2) The lens meter according to the second aspect of the present disclosure is a spectacle measuring device provided with a display and measuring PD of the spectacle frame, and holds the spectacle frame in a shape in the spectacle wearing state worn by the wearer. The holding means for the spectacle frame, the left and right contact portions that come into contact with at least a part of the left and right temples, and the left and right contact portions are moved by moving at least one position of the left and right contact portions. a contact portion moving means for setting at least one of the position at a predetermined position and holding means having a PD measurement means for displaying a scale to measure a PD of the spectacle frame on the screen of the display, the ,
By bringing the left and right temples into contact with the left and right contact portions, the width between the left and right temples is changed to a width based on the predetermined position .

It is a schematic appearance of the lens meter which concerns on this Example. It is a figure which looked at the spectacle frame F from the upper end side of the rim FRL and FRR. It is a schematic block diagram of a temple adjustment unit. It is a figure which shows typically the operation of the temple adjustment unit. It is a figure which shows an example of a temple adjustment unit. It is a schematic block diagram of an optical system and a control system of a lens meter. It is a figure which shows the scale used at the time of PD measurement. It is a figure which shows an example of the scale display screen displayed on the screen of a display. It is the figure which matched the mark point of a lens LE with the scale displayed on the screen of a display. It is a figure which shows an example of the structure which provided the mechanism which can install the spectacle frame F more stably.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In the present disclosure, the depth direction of the lens meter 1 (the direction in which the temple FTL and FTR of the eyeglass frame F in FIG. 1 extend) is the Z direction, and the horizontal direction on a plane perpendicular to the depth direction (the eyeglass frame F in FIG. 1). The left and right end directions) will be described as the X direction, and the vertical direction (the upper and lower end directions of the eyeglass frame F in FIG. 1) will be described as the Y direction. Further, in the present disclosure, in a state where the display 2 is arranged perpendicular to the ground plane of the lens meter 1, the horizontal direction (the above X direction) is defined as the vertical direction with respect to the ground plane (the above Y direction). It will be described as the horizontal direction. In this disclosure, L and R attached to the reference numerals indicate left-handed and right-handed, respectively.

<Overview>
The lens meter (for example, lens meter 1) in the present embodiment includes a measurement optical system (for example, measurement optical system 20), a display (for example, display 2), a holding means (for example, a temple adjustment unit 10), and a PD. A measuring means (for example, a control unit 30) is provided.

For example, a measuring optical system measures the optical properties of a lens. For example, the display shows the measurement result. For example, displays of various shapes may be used as the display. For example, the display may be configured such that the vertical length of the display screen of the display is longer than the horizontal length of the display screen of the display. Further, for example, the display may be configured such that the horizontal length of the display screen of the display is longer than the vertical length of the display screen of the display. Further, for example, the display may be configured such that the vertical length of the display screen of the display and the horizontal length of the display screen of the display are the same length.

For example, the holding means is a holding means for holding the spectacle frame, and abuts on at least one of the left and right temples of the spectacle frame (for example, the left temple FTL and the right temple FTR), and the holding means of at least one of the left and right temples. By moving the position, the width between the left and right temples is changed. For example, changing the width includes a configuration in which the width is widened, a configuration in which the width is narrowed, and the like.

For example, the holding means can be placed at any position on the lens meter. For example, it may be arranged on the back side of the display. Further, for example, it may be arranged on the front side of the display. Further, for example, it may be arranged on the upper side of the display. Further, for example, it may be arranged on the lower side of the display.

For example, as the holding means, the positions of the left and right contact portions (for example, the contact portion 14) that abut on at least a part of each of the left and right temples and the position of at least one of the left and right contact portions. It may be configured to include a contact portion moving means for moving the above. Further, for example, the holding means is a left and right contact portion that contacts at least a part of each of the left and right temples, and the left and right contact portions in which the distance between the left and right contact portions is set at a predetermined distance. It may be configured to include.

For example, the contact portion moving means may be configured to be manually adjusted. In this case, for example, a configuration may be used in which the operator has an operation unit (for example, a rotary knob, a slider, a drive switch, etc.) and the position of the contact portion is moved by operating the operation unit. ..

Further, for example, the contact portion moving means may be configured to be automatically adjusted. In this case, for example, the head width information of the subject (wearer) who wears the spectacle frame is provided, and the contact portion moving means (for example, the control unit 30) is the head acquired by the acquisition means. A configuration may be used in which at least one of the left and right contact portions is moved in the left-right direction based on the width information. In addition, for example, the acquisition means may have a configuration in which head width information can be input, or may have a configuration in which head width information acquired by another device is received.

For example, the abutting portion may be arranged so as to abut the ear hook portions of the left and right temples of the spectacle frame.

For example, the PD measuring means is used to measure the PD of the spectacle frame held by the holding means.

For example, the PD measuring means may be configured to display a scale for measuring the PD of the spectacle frame on the screen of the display. In this case, for example, the PD measuring means displays a scale for the examiner to visually read the positions of the marking points on the lens surfaces of the left lens and the right lens attached to the spectacle frame in the left-right direction. It may be configured to be displayed on.

Further, the PD measuring means may be configured to calculate PD by automatically reading the stamp point. In this case, for example, an image acquisition means for acquiring images of the left and right lenses, a detection means for detecting the left and right marking points by analyzing the acquired images of the left and right lenses, and a detection means between the detected left and right marking points. The configuration may include a calculation means for measuring PD by calculating the distance between the two. For example, a measurement optical system may be used as the image acquisition means. For example, the image acquisition means may be configured to acquire a lens image by separately providing a photographing optical system. Further, the image acquisition means may be configured to acquire an image by receiving a lens image acquired by another device.

For example, the PD measuring means may be configured to measure PD by detecting the optical centers of the left and right lenses by the measuring optical system 20 of the lens meter and calculating the distance between the left and right optical centers. For example, when detecting the position of the optical center of the lens, the examiner may detect the optical center by moving (aligning) the lens LE, or the lens and the measurement optical system are automatically connected. The relative position may be adjusted to detect the optical center.

<Example>
Hereinafter, it will be described in this Example. FIG. 1 is a schematic external view of the lens meter device. In this embodiment, for example, the lens meter 1 includes a display (monitor) 2, an input switch 3, a nose piece 4, a lens retainer 5, a lens table 6, a lever 7, a marking mechanism 8, a READ switch 9, and a temple adjustment unit. It is equipped with 10 mag. The lens meter 1 in this embodiment has a configuration having the above configuration, but is not limited thereto. The lens meter 1 in this embodiment may be configured to include at least a temple adjustment unit 10.

For example, an LCD (Liquid Crystal Display) is used for the display 2. In this embodiment, the display 2 has been described with an example of a configuration using an LCD, but the present invention is not limited to this. For example, the display 2 may be configured to use an organic EL (Electro Luminescence) display or a plasma display.

For example, the display 2 is a touch panel. That is, in this embodiment, the display 2 functions as an operation unit (controller). Of course, the display 2 does not have to be a touch panel type. Further, for example, the display 2 may use a plurality of displays in combination.

For example, the display 2 outputs a signal corresponding to the input operation instruction to the control unit 30 (see FIG. 6) described later. Of course, the display 2 and the operation unit may be provided separately. For example, as the operation unit, a configuration using at least one of a mouse, a joystick, a keyboard, a mobile terminal, and the like can be mentioned.

For example, various information is displayed on the display 2. For example, the various information includes the measurement result measured by the lens meter, the scale 40 (see FIG. 7) required for measuring the optical center distance (that is, the interpupillary distance) of the left and right lens LEs, and the like. The distance between the optical centers and the distance between the pupils will be described later.

In this embodiment, for example, the display 2 has a shape in which at least the length of the display screen in the vertical direction (Y direction) is longer than the length of the display screen in the horizontal direction (X direction). That is, the display 2 is a display in which the display screen of the display has a vertically long shape. Of course, the shape of the display 2 is not limited to this embodiment. For example, as the display 2, a display in which the vertical length of the display screen has the same shape as the horizontal length of the display screen may be used. Further, for example, as the display 2, a display having a shape in which the horizontal length of the display screen is longer (that is, horizontally long) than the vertical length of the display screen may be used.

For example, the input switch 3 is used for the lens meter 1 to input an input signal for executing various processes (for example, switching of various measurement modes, changing the display position of the scale 40 on the screen of the display 2, etc.). .. For example, in this embodiment, the input switch 3 is displayed on the screen of the display 2. That is, for example, the input switch 3 can be operated by touching the screen of the display 2. In this embodiment, the configuration in which the input switch 3 is electronically displayed on the screen of the display 2 is described as an example, but the present invention is not limited to this. For example, the input switch 3 may be installed on the lens meter 1, the display cover 2a, or the like.

For example, the nosepiece 4 is a base point for measuring the optical characteristics of the lens LE (for example, spherical power S, columnar power C, astigmatic axis angle A, prism amount Δ, etc.). For example, the lens retainer 5 is for pressing the lens LE from above and holding it stably. For example, the lens table 6 is used when measuring the optical characteristics of the lens LE with a spectacle frame. In this case, for example, the lower ends of the left and right rims of the spectacle frame F are brought into contact with the lens table 6. For example, the lever 7 is for moving the lens table 6 in the Z direction. For example, the stamping mechanism 8 applies a stamping point to the optical center of the lens LE. For example, the READ switch 9 is used when reading the optical characteristics of the lens LE.

For example, the temple adjusting unit 10 is a holding means for holding the spectacle frame F. Further, for example, the temple adjustment unit 10 is used for measuring PD. Further, for example, the temple adjustment unit 10 is used to deform the shape of the spectacle frame F. For example, the temple adjustment unit 10 is arranged on the back side (for example, the back side of the display 2) of the lens meter 1. In this embodiment, a configuration in which the temple adjustment unit 10 is arranged on the back side of the lens meter 1 will be described as an example, but the present invention is not limited to this. For example, the temple adjustment unit 10 can be arranged at any position as long as it holds the spectacle frame F and the width between the temples can be changed. For example, the temple adjustment unit 10 may be arranged on the front side of the lens meter 1.

Hereinafter, the interpupillary distance of the spectacle wearer (hereinafter referred to as PD (Pupil Distance)) and the distance between the optical centers of the lens LE (hereinafter referred to as OCD (Optical Center Distance)) will be described. For example, PD is indicated by the distance of a straight line connecting the center of the pupil of the left eye and the center of the pupil of the right eye. For example, OCD is indicated by the distance of a straight line connecting the optical center of the left lens of the lens LE and the optical center of the right lens.

For example, the spectacles are made so that the PD of the spectacle wearer and the OCD of the lens LE attached to the spectacle frame F match.

For example, when calculating the PD of a spectacle wearer, the PD can be calculated by detecting the optical centers of the left and right lenses attached to the spectacles and obtaining the distance between the optical centers. For example, the examiner uses the marking mechanism 8 to detect the optical center of the left and right lenses attached to the spectacles by the lens meter 1. The examiner assigns the stamp points PLc and PRc (see FIG. 9) indicating the optical centers of the left and right lenses to the detected optical center positions by using the stamp point mechanism 8. Then, the examiner measures the distance between the marking points PLc and PRc indicating the optical centers of the left and right lenses LE. This allows the examiner to determine the PD of the spectacle wearer.

Here, when the wearer wears the spectacles (spectacle frame), the wearer spreads the temple portion of the spectacle frame and wears it on the face. When the spectacle frame is attached to the wearer, the temple portion of the spectacle frame grips the wearer's head, and the reaction force causes the spectacle frame itself to be deformed. As a result, the spectacle frame has a different shape between the shape in the spectacles worn state worn by the wearer and the shape in the spectacles non-wearing state before being worn by the wearer. As a result, the PD of the spectacles changes depending on whether the spectacles are worn or not. For this reason, there is a problem that it is not good when the wearer actually wears the spectacles when the spectacle lens is processed by using the PD measured in the non-wearing state of the spectacles to manufacture the spectacles. In particular, for spectacles having a high curve frame (a spectacle frame having a large warp angle), the change in PD becomes larger due to the deformation of the spectacles when the spectacles are worn and when the spectacles are not worn.

Hereinafter, the effects of deformation of the spectacles on the spectacles worn state and the spectacles non-wearing state will be described in more detail. FIG. 2 is a view of the spectacle frame F viewed from the upper end side of the left rim (hereinafter referred to as rim) FRL and the right rim (hereinafter referred to as rim) FRR. FIG. 2A shows a spectacle frame in a state where the spectacles are not worn. FIG. 2B shows a spectacle frame in a spectacle-wearing state. For example, the spectacle frame F in the spectacles non-wearing state has a shape in which the left temple FTL and the right temple FTR) are inserted into the inside of the spectacles (the temple portion is rounded) as shown in FIG. 2A. On the other hand, as shown in FIG. 2B, the spectacle frame F in the spectacles worn state has a shape in which the left temple FTL and the right temple FTR are curved outward from the spectacles (the temple portion is not rounded).

For example, in this embodiment, as shown in FIG. 2, the distance between the optical centers of the left and right lenses in the state of wearing spectacles (PD when wearing spectacles) d2 is the distance between the optical centers of the left and right lenses in the state of not wearing spectacles. (PD when wearing eyeglasses) Longer than d1.

The conventional lens meter measures the PD of the lens LE without wearing the spectacles, and the above-mentioned change in the shape of the spectacle frame F is not taken into consideration. In this case, in the spectacles produced by processing the lens LE using the PD in the non-wearing state of the spectacles, the position of the optical center of the lens LE and the position of the pupil of the spectacle wearer do not match. In such a case, the position of the image seen through the spectacles deviates from the position of the originally visible image due to the generation of the prism. Further, even if a spectacle wearer wears spectacles (spectacle frame), it is not possible to obtain the optical characteristics necessary for obtaining a good field of view through the spectacles. For this reason, when a spectacle wearer wears spectacles (spectacle frames) produced by using PD in a state where the spectacles are not worn, eyestrain, discomfort, difficulty in viewing, and the like occur.

For example, the lens meter in this embodiment has a configuration in which the temple adjustment unit 10 is used to hold the spectacle frame F and change the width between the left temple FTL and the right temple FTR of the spectacle frame F. For example, the shape of the spectacle frame F can be deformed according to the head width of the spectacle wearer and the like. In other words, it is possible to reproduce the state in which the spectacle wearer wears the spectacle frame F.

Hereinafter, the temple adjustment unit 10 will be described in detail. FIG. 3 is a schematic configuration diagram of the temple adjustment unit 10. For example, the temple adjusting unit 10 abuts on at least one of the left temple FTL and the right temple FTR of the spectacle frame F, and moves the position of at least one of the left and right temples to move the width W between the left and right temples (FIG. 4). (See) is to be changed.

For example, in this embodiment, the temple adjusting unit 10 holds the spectacle frame F by contacting both the inside and the outside of the temple in each of the left temple FTL and the right temple FTR. explain. Of course, the temple adjusting unit 10 is not limited to a configuration that contacts both the inside and the outside of the temple. For example, the temple adjusting unit 10 may hold the spectacle frame F only on the inside of the temple at each of the left and right temples, or may abut only on the outside of the temple at each of the left and right temples. May be retained. Further, for example, the temple adjusting unit 10 may have a configuration in which one of the left and right temples is in contact with the inside and the other is in contact with the outside.

In this embodiment, the temple adjusting unit 10 is described by taking as an example a configuration in which the temples are in contact with both the left and right temples, but the present invention is not limited to this. For example, the temple adjusting unit 10 may be configured to hold the spectacle frame F by abutting on either the left temple FTL or the right temple FTR as described above. In this case, for example, the temple adjusting unit 10 may abut only on the inside of either the left or right temple to hold the spectacle frame F. Further, in this case, for example, the temple adjusting unit 10 may abut only on the outside of either the left or right temple to hold the spectacle frame F.

For example, the temple adjusting unit 10 includes a rotary knob 11, a support column 12, a moving portion 13, a contact portion 14, a gear 15, a guide portion 16, a support portion 17, and the like. The temple adjustment unit 10 has a configuration having the above configuration, but is not limited to this. The temple adjusting unit 10 in this embodiment may be configured to include at least the contact portion 14. For example, the rotary knob 11 is for moving the moving portion 13. For example, a rotary knob 11 is fixed above the support column 12, and a gear 15 is fixed below the support column 12.

For example, the moving portion 13 includes a left moving portion 13L for use in the left temple FTL of the spectacle frame F and a right moving portion 13R for use in the right temple FTR. For example, the moving portions 13L and 13R are formed with gear portions that mesh with the gear 15. In this embodiment, the gear portion of the moving portion 13 and the gear 15 are meshed with each other to move the moving portion 13, but the present invention is not limited to this. For example, a mechanism for directly sliding the slider may be used instead of the gear 15. In this case, a grip portion for directly moving the moving portion 13 may be provided in the moving portion 13, and the moving portion 13 may be moved by the examiner putting a finger on the grip portion and moving the grip portion.

For example, the abutting portion 14 includes a left abutting portion 14L that abuts at least a part of the left temple FTL of the spectacle frame F, and a right abutting portion 14R that abuts at least a part of the right temple FTR of the spectacle frame F. To be equipped with. For example, the left side moving portion 13L is fixed to the left side contact portion 14L, and the right side moving portion 13R is fixed to the right side contact portion 14R.

For example, in this embodiment, the contact portions 14L and 14R are configured to hold the temple by sandwiching the temple. That is, in this embodiment, the temple adjusting unit 10 is configured to abut on both the inside and the outside of the temple. For example, the contact portions 14L and 14R are each composed of two members. For example, the two members that make up the abutting portion are connected by a spring (not shown) and attract each other. For example, in the present embodiment, the two members are attracted by the spring and the spectacle frame F is held by abutting the two members constituting the contact portion 14 so as to sandwich the temple of the spectacle frame F. To. That is, the contact portion 14 holds the spectacle frame F by abutting on both the inside and the outside of the temple of the spectacle frame F. For example, the number of members constituting the contact portion 14 is not limited to the above configuration.

In this embodiment, when the temple adjusting means contacts at least one of the inside and the outside of the temple of the spectacle frame F, for example, the contact portion 14 is on the upper side and the lower side of the temple of the spectacle frame F. Including the case of contact.

In this embodiment, an example in which the moving portion 13 and the contact portion 14 are formed of different members will be described, but the present invention is not limited to this. For example, the moving portion 13 and the contact portion 14 may be integrally formed. Further, for example, the contact portion 14 may be in contact with at least a part of the left and right temples of the spectacle frame F. That is, for example, the contact portion 14 may contact the entire left and right temples in the spectacle frame F. Further, for example, the abutting portion 14 may abut on a part of the left and right temples in the spectacle frame F (for example, the ear hook portion FML and FMR of the temple). For example, when the contact portion 14 is brought into contact with the ear hook portions FML and FMR of the left and right temples, when the spectacle frame F is installed on the lens meter 1, when the spectacle wearer wears the spectacle frame F. It is possible to reproduce a state close to (that is, when the spectacle frame F is held by the ear of the spectacle wearer). Of course, the configurations of the contact portions 14L and 14R may differ between the left temple FTL and the right temple FTR.

For example, the guide unit 16 is for making the moving units 13L and 13R movable in the lateral direction (X direction) of the temple adjusting unit 10. For example, the guide portion 16 includes a left side guide portion 16L to which the left side moving portion 13L is attached and a right side guide portion 13R to which the right side moving portion 13R is attached. For example, the guide portion 16 is fixed to the support portion 17. For example, the support portion 17 is fixed inside the lens meter 1. In this embodiment, for example, the guide portion 16 is a mechanism for sliding the moving portions 13L and 13R, but the guide portion 16 is not limited thereto. For example, the moving unit 13 may be configured to be movable in a predetermined direction. In this case, for example, a gear mechanism or the like that meshes with the moving portions 13L and 13R can be used.

FIG. 4 is a diagram schematically showing the operation of the temple adjustment unit 10. 4 (a) and 4 (b) are diagrams showing an example in which the adjustment states of the temple adjustment unit 10 are different from each other. For example, in the lens meter 1 of the present embodiment, the examiner rotates the rotation knob 11 to rotate the support column 12 and the gear 15 fixed to the support column 12. For example, the moving portions 13L and 13R that mesh with the gear 15 move in the X direction along the guide portions 16L and 16R by the rotation of the gear 15. As a result, the distance W between the contact portions 14L and 14R is changed. That is, when the temples FTL and FTR of the spectacle frame F are in contact with the contact portions 14L and 14R, the width W between the left and right temples can be adjusted. The configuration of the transmission mechanism that moves the moving unit 13 by operating the rotary knob 11 is not limited to this. For example, the configuration may be such that the rotation of the rotary knob 11 is transmitted to the moving portion 13. In this case, for example, a configuration using a belt, an elastic member, or the like can be mentioned as the transmission mechanism.

For example, in this embodiment, the moving directions of the contact portions 14L and 14R (or the moving portions 13L and 13R) are changed by switching the rotation direction of the rotary knob 11. For example, when the rotary knob 11 is rotated clockwise, the left moving portion 13L moves in the left direction (A direction), and the right moving portion 13R moves in the right direction (B direction) (that is, FIG. 4A). ) Is changed to the state shown in FIG. 4 (b)). Further, for example, when the rotary knob 11 is rotated counterclockwise, the left moving portion 13L moves in the right direction (B direction), and the right moving portion 13R moves in the left direction (A direction) (that is, the figure). The state of 4 (b) is changed to the state of FIG. 4 (a)). Of course, the moving direction of the moving portion 13 with respect to the rotating direction of the rotary knob 11 may have a configuration different from that of the present embodiment.

For example, the distance W between the left side contact portion 14L and the right side contact portion 14R, that is, the width W between the left and right temples in the spectacle frame F is determined from the amount of rotation of the rotation knob 11. For example, the spectacle frame holding unit 10 may include a sensor that detects the amount of rotation of the rotary knob 11. When the examiner rotates the rotary knob 11, the control unit 30 (see FIG. 6) calculates the width W between the left and right temples from the amount of rotation of the rotary knob 11 and displays the value on the screen of the display 2. .. For example, a variable resistor (potentiometer) can be used as a sensor for detecting the amount of rotation of the rotary knob 11. In this case, for example, the resistance value of the potentiometer increases or decreases according to the rotation of the rotary knob 11, and the amount of current flowing in the lens meter 1 changes. For example, the amount of rotation of the rotary knob 11 can be obtained from the amount of change in this current. Further, for example, a photodetector (optical sensor) can be used as a sensor for detecting the amount of rotation of the rotary knob 11. In this case, for example, the slit plate is rotated according to the rotation of the rotary knob 11. For example, the amount of rotation of the rotary knob 11 can be determined by detecting the number of times the light has passed through the slit plate.

In this embodiment, the configuration in which the distance W between the left side contact portion 14L and the right side contact portion 14R is displayed on the screen of the display 2 has been described as an example, but the present invention is not limited to this. For example, the distance W between the contact portions 14L and 14R may not be displayed on the screen of the display 2. In this case, for example, as shown in FIG. 5, the lens meter 1 may be provided with an index 18, and the rotary knob 11 may be provided with a scale 19 indicating the distance W between the left side contact portion 14L and the right side contact portion 14R. The examiner rotates the rotary knob 11 so that the desired scale is aligned with the index 18. More specifically, for example, when the examiner wants to set the width W between the left and right temples to 16 cm, the numerical value of 16 of the scales 19 written on the rotary knob 11 is set as the index 18 written on the lens meter 1. It should be adjusted to. As a result, the distance W between the left side contact portion 14L and the right side contact portion 14R is set to 16 cm, and the width W between the left and right temples in the spectacle frame F is set to 16 cm.

In this embodiment, a configuration in which the temple adjustment unit 10 is manually operated has been described as an example, but the present invention is not limited to this. For example, the distance W between the contact portions 14L and 14R may be automatically adjusted by using an electric mechanism such as a motor. For example, there is a configuration in which the movement of at least one of the contact portions 14L and 14R (or the moving portions 13L and 13R) is controlled by detecting the positions of the moving portions 13L and 13R with a position detection sensor or the like. Further, for example, there is a configuration in which the movement of at least one of the contact portions 14L and 14R (or the moving portions 13L and 13R) is controlled by detecting the rotation amount of the motor or the like.

In this embodiment, the case where the distance W between the contact portions 14L and 14R of the temple adjusting unit 10 is adjusted by the operation of the examiner has been described as an example, but the present invention is not limited to this. For example, the distance W between the contact portions 14L and 14R may be adjusted via another device. In this case, for example, the width W between the contact portions 14L and 14R may be adjusted by receiving the head width information of the spectacle wearer acquired by another device by the lens meter 1. For example, the lens meter 1 includes a receiving unit that receives a signal from another device, and receives a signal transmitted from the other device. The control unit 30 moves the contact unit 14 based on the received signal. As a result, the distance W between the contact portions 14 is adjusted. In this way, the width W between the left and right temples is automatically changed based on the head width information of the spectacle wearer, so that the width W between the left and right temples can be easily adjusted to the head width of the spectacle wearer. ..

Further, in this embodiment, in order to change the distance W between the contact portions 14L and 14R, both the contact portions 14L and 14R (moving portions 13L and 13R) move as an example. Not limited. For example, the position of the contact portion of at least one of the contact portions 14L and 14R may be moved. That is, only one of the contact portions 14L and 14R may be moved. In this case, for example, the temple adjusting unit 10 has a configuration in which the contact portion 14 holds the left and right temple FTs, and at least one of the left and right temples is moved inward (for example, the temples are inside). The configuration that is pushed into, etc.) can be mentioned. Further, for example, a configuration in which the contact portion 14 holds the left and right temple FTs and at least one of the left and right temples is moved outward (for example, a configuration in which the temples are pulled outward) can be mentioned. Be done.

In this embodiment, the configuration in which the distance W between the contact portions 14L and 14R is changed by moving the contact portion 14 (moving portion 13) by a predetermined distance has been described as an example. Not limited to this. For example, the distance W between the contact portions 14L and 14R may be changed by moving the contact portions 14 in the left-right direction in predetermined steps (for example, 0.5 cm intervals). Further, for example, the distance W between the contact portions 14L and 14R may be changed to the average head width of the spectacle wearer. In this case, for example, an average head width of a man, a woman, a child, or the like is set, and the contact portion 14 moves in the left-right direction by arbitrarily switching the head width. In this embodiment, the distance W between the contact portions 14L and 14R can be changed, but the present invention is not limited to this. For example, the distance W between the contact portions 14L and 14R may be fixed in advance to a predetermined distance (for example, the average head width of a person).

FIG. 6 is a schematic configuration diagram showing an optical system and a control system of the lens meter. For example, the measurement optical system 20 includes a measurement light source 21, a collimating lens 22, a mirror 23, a grid plate 24, a two-dimensional light receiving sensor 25, and the like. For example, the measurement light source 21 is composed of an LED (Light Emitting Diode). For example, the measurement light source 21 is arranged on the measurement optical axis L1. For example, the measurement optical axis L1 is arranged perpendicular to the plane of the opening 4a (circular shape having a diameter of 8 mm) of the nose piece 4. For example, a large number of measurement indexes are formed on the grid plate 24 in order to measure the optical characteristics at a plurality of locations of the lens LE at one time. For example, the grid plate 24 is held by the holding member 26 of the lens meter 1. Since a well-known technique is applied to the configuration of the measurement index and the measurement of the optical characteristics of the test lens LE using the measurement index, refer to Japanese Patent Application Laid-Open No. 2008-241694 for details.

For example, a display 2, a READ switch 9, a measurement light source 21, a two-dimensional light receiving sensor 25, a memory 31, and the like are connected to the control unit 30. The control unit 30 may be composed of a plurality of control units (that is, a plurality of processors). For example, the control unit 30 performs arithmetic processing for calculating the optical characteristics of the lens LE. Further, for example, the control unit 30 performs display control for switching various measurement modes. In this embodiment, for example, the control unit 30 changes the display position of the scale 40 on the screen of the display 2 (details will be described later). For example, the memory 31 stores scale information and the like to be displayed when measuring the PD of the lens LE.

Hereinafter, as a PD measuring means, a scale for the examiner to visually read the positions of the marking points on the lens surfaces of the left lens and the right lens attached to the spectacle frame in the left-right direction is displayed on the screen of the display. The case of using the configuration will be described as an example. Of course, the PD measuring means is not limited to the above configuration.

FIG. 7 is a diagram showing an example of the scale 40 used at the time of PD measurement. For example, the scale 40 is for measuring the distance between the stamp points PLc and PRc (see FIG. 9) attached to the optical center of the lens LE. That is, the scale 40 is for measuring PD. For example, the scale 40 is composed of a vertical line 41, a horizontal line 42, a guide mark 43, and the like. For example, the vertical line 41 is a straight line perpendicular to the vertical direction (Y direction) of the display 2. For example, the vertical lines 41 are arranged at equal intervals with respect to the horizontal direction (X direction) of the display 2 at predetermined measurement unit distances (for example, 1.0 mm of the actual size). For example, above the vertical line 41, distance values "20", "30", "40", and "50" as actual size distances are displayed in the left-right direction from the reference line 44 described later. For example, below the vertical line 41, reference distance numerical values "0", "10", "50" ... "80" for reading the PD are displayed. The distance values "10" to "80" below the vertical line 41 are actual distances (unit: mm) from the distance value "0" below the vertical line 41. For example, the horizontal line 42 is a straight line that intersects the center of the vertical line 41 perpendicularly. For example, the horizontal line 42 is used to align the vertical positions of the stamp points PLc and PRc (see FIG. 9) attached to the left and right lenses LE.

For example, the guide mark 43 is for confirming whether or not the center of the bridge FB in the spectacle frame F is located at the center of the scale 40. For example, the guide mark 43 is composed of a reference line 44, a first guide mark 45, a second guide mark 46, and the like. For example, the reference line 44 is a straight line perpendicular to the vertical direction (Y direction) of the display 2. For example, the reference line 44 is located at the center of the left and right sides of the scale 40. For example, the first guide mark 45 is composed of a triangular mark and a figure inclined toward the reference line 44. For example, the first guide mark 45 is located below the horizon 42. For example, the second guide mark 46 is composed of straight lines arranged at intervals of 1.0 mm in the same manner as the vertical line 41 in the left-right direction of the reference line 44. For example, the second guide mark 46 is located above the horizontal line 42. For example, the guide mark 43 and the first guide mark 45 and the second guide mark 46 constituting the guide mark 43 are symmetrical figures centered on the reference line 44.

The display of figures constituting the scale 40, such as the vertical line 41, the horizontal line 42, and the guide mark 43, is not limited to this embodiment. For example, in this embodiment, vertical lines 41 at intervals of 1.0 mm are displayed at a distance of 15-50 mm in the left direction and a distance of 15-50 mm in the right direction with respect to the reference line 44. For example, although the vertical line 41 is not provided at a distance of 1 to 14 mm in the left and right directions with respect to the reference line 44, a vertical line 41 may be provided between these distances. Further, for example, although the horizontal line 54 is displayed so as to be divided around the guide mark 43, it may be displayed as one continuous line. Further, for example, the guide mark 43 may have a configuration that makes it easy to determine the left-right center of the scale 40, and various figures can be applied to the figure.

FIG. 8 is a diagram showing an example of a scale display screen displayed on the screen of the display 2. The scale display screen is displayed on the screen of the display 2 when measuring the PD of the lens LE. For example, the scale 40, the input switch 3, and the like are displayed on the scale display screen. Of course, the scale display screen is not limited to the above configuration.

For example, the input switch 3 provided on the scale display screen includes scale display position change switches 51a and 51b, a display display color inversion switch 52, a PD reference index movement switch 53, and the like.

For example, the scale display position change switch 51a is used when the scale 40 is moved to the upper part of the screen of the display 2. Further, for example, the scale display position change switch 51b is used when the scale 40 is moved to the lower side of the screen of the display 2. For example, when the scale display position change switch 51 is selected, a signal for integrally moving the scale 40 including the vertical line 41, the horizontal line 54, the distance value, the guide mark 43, etc. is controlled to move upward or downward on the scale display screen. It is transmitted to the unit 30. For example, the control unit 30 controls the display of the display 2 based on these input signals.

For example, the control unit 30 moves the scale 40 one step at a time upward or downward each time the input signal transmitted by the selection of the scale display position change switch 51 is received. For example, one step corresponds to one pixel of the display. For example, one pixel in the vertical direction of the display is 0.2 mm. That is, for example, each time the scale display position change switch 51 is selected, the position of the scale 40 displayed on the screen of the display 2 moves upward or downward by 0.2 mm.

For example, the display display color inversion switch 52 is used when switching the background of the display 2 to white or black. For example, when the display display color inversion switch 52 is selected, a signal for inverting the black and white (luminance) of the display color on the display 2 is transmitted to the control unit 30. For example, in this embodiment, the display 2 has a white background and the scale 40 has a black display. For example, by selecting the display display color inversion switch 52, the display 2 can be displayed on a black background and the scale 40 can be displayed on a white background. Therefore, the examiner can read the positions of the stamp points PLc and PRc given to the left and right lens LE under favorable conditions for the examiner. For example, with a colored lens or the like, it may be easier to read the position of the stamp point if the display 2 is displayed in black and the scale 40 is displayed in white. In this embodiment, a configuration in which the background color of the display 2 is inverted from white to black and the display color of the scale 40 is inverted from black to white will be described as an example, but the present invention is not limited to this. For example, the background color of the display 2 and the display color of the scale 40 may be any display that is easy for the examiner to see. In this case, for example, a switch for changing the color scheme of the display 2 or the scale 40 may be separately provided so that the examiner can arbitrarily change the color balance of the display 2.

For example, the PD reference index movement switch 53 is used when measuring the distance between the stamp points PLc and PRc given to the left and right lens LE. For example, when the PD reference index movement switch 53 is selected, the PD reference line 54 moves on the scale 40. For example, the PD reference line 54 has a PD reference line 54L for aligning with the stamp point PLc given to the left lens LE and a PD reference line 54R for aligning with the stamp point PRc given to the right lens LE. And. For example, the control unit 30 calculates the distance between the PD reference lines 54L and 54R and displays them on the screen of the display 2. The details of the PD reference line 54 will be described later.

The operation of the lens meter having the above configuration will be described. For example, in this embodiment, an operation of measuring PD using the scale 40 after measuring the optical characteristics of the left and right lens LEs will be described. Of course, only PD measurement may be performed.

For example, the examiner installs spectacles on the nose piece 4 and measures the optical characteristics of the left and right lenses LE. For example, first, the left lens of the spectacles is measured. Of course, the measurement may be performed from the right lens. In the case of a lens meter capable of simultaneously measuring the left and right lens LEs, the left and right lenses may be measured at the same time. The examiner arranges the left lens so as to be located on the nose piece 4 and starts the measurement. For example, when the measurement of the optical characteristics of the left lens LE is completed, the examiner uses the marking mechanism 8 to add a marking point to the optical center of the left lens. After the stamping point is given to the left lens, the stamping point is given to the optical center of the right lens by using the marking mechanism 8 in the same manner as for the left lens.

For example, the stamp points are a center stamp point (PLc and PRc) indicating the optical center of the lens LE, and a stamp point (PL1 and PL2, and PR1 and PR2) located horizontally on the right and left sides of the center stamp point. (See FIG. 9). The number and positions of stamp points may be different from those in this embodiment.

The examiner then selects a scale display mode selector switch (not shown) displayed on the display 2. When the examiner selects a scale display mode changeover switch (not shown), the control unit 30 switches the measurement mode from the optical characteristic measurement mode to the scale display mode. Further, the control unit 30 causes the display 2 to display a scale display screen for measuring the PD of the lens LE. In this embodiment, a configuration in which the scale display mode is switched by selecting a scale display mode changeover switch (not shown) is given as an example, but the present invention is not limited to this. For example, both the left lens and the right lens may be configured to automatically switch from the optical characteristic measurement mode to the scale display mode after acquiring the optical characteristics of each and giving a mark.

For example, when the lens meter 1 is switched to the scale display mode, the scale display screen is displayed on the screen of the display 2.

For example, the examiner installs the spectacle frame F to which the left and right lens LEs are attached in the temple adjustment unit 10. For example, in this embodiment, the left temple FTL of the spectacle frame F is brought into contact with the left side contact portion 14L so as to be sandwiched between them. Further, for example, in this embodiment, the right temple FTR is brought into contact with the right temple FTR so as to be sandwiched between the right side contact portions 14R. As a result, the spectacle frame F is held by the lens meter 1, and the lens LE of the spectacle frame F is kept horizontal with respect to the screen of the display 2.

For example, the examiner adjusts the temple adjustment unit 10. For example, the control unit 30 calculates the distance W between the left side contact portion 14L and the right side contact portion 14R from the amount of rotation of the rotation knob 11. Further, for example, the control unit 30 displays the calculated distance W on the screen of the display 2. As a result, the examiner can change the distance W between the contact portions 14 by adjusting the value displayed on the display 2 while looking at the screen of the display 2. For example, the examiner operates the rotary knob 11 of the temple adjustment unit 10 while checking the width W displayed on the display 2, and determines the head width of the spectacle wearer and the width W between the left and right temples of the spectacle frame F. match. In this way, the lens meter 1 in this embodiment can reproduce the shape of the spectacle frame F when the spectacle wearer wears the spectacle frame F.

Next, the examiner acquires the PD by measuring the distance between the stamp points PLc and PRc attached to the left and right lenses LE in the left-right direction using the scale display screen. The examiner measures PD using the scale display screen displayed on the display 2.

For example, FIG. 9 is a diagram in which the mark point of the lens LE is aligned with the scale 40 displayed on the screen of the display 2. The spectacle frame F to which the lens LE with a mark is attached is installed so that the left and right temple FTs face the back direction of the lens meter 1 and the lower ends of the left and right rim FRs face the lower side of the display 2.

For example, the examiner appropriately selects the scale display position change switch 51 so that the height of the horizontal line 42 of the scale 40 displayed on the display 2 matches the heights of the mark points PLc and PRc of the left and right lenses LE. Adjust. When the scale display position change switch 51 is selected by the examiner, the control unit 30 moves the display position of the scale 40 upward or downward by one step (0.2 mm). For example, each time the change switch 51a is selected by the examiner, the control unit 30 integrally sets the scale 40 including the vertical line 41, the horizontal line 54, the distance numerical value, the guide mark 43, etc. to 0 above the scale display screen. . Move 2 mm. Further, for example, each time the change switch 51b is selected by the examiner, the control unit 30 integrally lowers the scale 40 including the vertical line 41, the horizontal line 54, the distance numerical value, the guide mark 43, etc. on the lower part of the scale display screen. Move 0.2 mm to. In this embodiment, the configuration in which the scale 40 moves upward or downward for each step has been described, but the present invention is not limited to this. For example, the scale 40 may be moved to a position where the examiner presses and holds on the screen of the display 2. Further, for example, the scale 40 may be configured to detect the position of the spectacle frame F and automatically move to that position.

For example, when measuring PD, the examiner confirms that the center of the bridge FB of the spectacle frame F is located at the reference line 44 of the guide mark 43. More specifically, the left-right symmetry of the first guide mark 45 and the second guide mark 46 is compared, and it is confirmed that the center of the bridge FB is located at a position where each figure is left-right symmetric. For example, although not described in the configuration of the lens meter 1 in this embodiment, the lens meter 1 may be provided with a mechanism for aligning the center of the bridge FB with the reference line 44. In this case, for example, the lens meter 1 may be provided with a change switch capable of moving the position of the scale 40 displayed on the screen of the display 2 in the left-right direction. Alternatively, the spectacle frame F may be configured to be movable in the left-right direction.

Next, for example, the examiner selects the PD reference index movement switch 53 for moving the PD reference line 54, and positions the PD reference line 54L used for the left lens LE at a position where it intersects the mark point PLc of the left lens LE. Move. Similarly, for example, the PD reference index movement switch 53 is selected to move the PD reference line 54R used for the right lens LE to a position where it intersects the marking point PRc of the right lens LE.

For example, the control unit 30 calculates the distance between the PD reference line 54L and the PD reference line 54R. The control unit 30 displays the calculated distance as a PD on the screen of the display 2. As a result, the examiner can easily obtain the PD.

Further, for example, the control unit 30 displays the one-eye PD on the screen of the display 2. The single-eye PD is the distance between the left-right center of the spectacle frame F (that is, the left-right center of the bridge FB) and the optical center of the lens LE on one side. For example, the control unit 30 calculates the distance from the reference line 44 of the scale 40 to the PD reference line 54L. The control unit 30 displays the calculated distance as a left PD on the screen of the display 2. Similarly, for example, the control unit 30 calculates the distance from the reference line 44 of the scale 40 to the PD reference line 54R. The control unit 30 displays the calculated distance as the right PD on the screen of the display 2. As a result, the examiner can also acquire one-eye PD for each of the left and right lens LEs.

As described above, in the present embodiment, for example, in the lens meter, by providing the configuration for changing the width between the left and right temples, the spectacle frame is deformed when the wearer wears the spectacles (spectacle frame). It is possible to measure PD in consideration of the above. As a result, it is possible to acquire the PD in a state close to the wearing state, and it is possible to acquire the PD in consideration of the deformation of the spectacle frame. In particular, in the case of a high-curve frame (a spectacle frame having a large warp angle), the deformation of the spectacle frame becomes large when the wearer wears the spectacles. Therefore, the technique of the present disclosure is particularly useful.

Further, for example, in the present embodiment, by providing a configuration in which the widths of the left and right temples can be changed to various widths, the deformed state of the spectacle frame according to the individual face width of the wearer is reproduced. It becomes possible. As a result, even if the deformed state of the spectacle frame when wearing the spectacles differs depending on the wearer, it is possible to easily reproduce the deformed state of the spectacle frame for each wearer.

Further, for example, in the present embodiment, by providing a configuration in which the widths of the left and right temples are changed to a predetermined width, a deformed state of the spectacle frame in a state close to the state in which the wearer wears the spectacles (spectacle frame) can be obtained. It can be easily reproduced.

Further, for example, in the present embodiment, by providing a configuration in which the widths of the left and right temples are automatically changed based on the head width information, the measurement can be easily and smoothly performed.

Further, for example, in the present embodiment, the contact portion is arranged so as to be in contact with the ear hook portion, so that when the spectacle frame is installed on the lens meter, the wearer actually wears the spectacle (glass frame). It is possible to reproduce a state close to that of the eyeglasses. Under this condition, the measurer can reproduce the deformed state of the spectacle frame in a state closer to the state in which the wearer actually wears the spectacles by changing the width of the left and right temples.

Further, for example, in the present embodiment, at least the vertical length of the display screen of the display is configured to be longer than the horizontal length of the display screen of the display, so that the horizontal width of the display is increased. Since the size can be reduced, the eyeglass frame can be held by the holding means (temple adjustment unit) without touching the display portion even if the distance between the left and right temples is small. That is, more specifically, for example, in the case where the temple adjustment unit is arranged on the back side of the display, if the width of the display 2 is larger than the width between the left and right temples of the spectacle frame, the temple adjustment unit I can't put my glasses on. In particular, when measuring PD in a spectacle frame having a short width between the left and right temples, the width of the left and right temples is often smaller than the width of the display 2, and the spectacles cannot be arranged in the temple adjustment unit. Therefore, it is possible to measure PD when wearing eyeglasses. Since the vertical length of at least the display screen of the display is longer than the horizontal length of the display screen of the display, the horizontal width of the display can be reduced, so that the width between the left and right temples can be reduced. Even if the distance is small, the eyeglass frame can be held by the holding means (temple adjustment unit) without touching the display portion. This makes it possible to measure PD.

In addition, for example, in this embodiment, the lens meter 1 may be provided with a mechanism capable of more stably installing the spectacle frame F. FIG. 10 is a diagram showing an example of a configuration in which a mechanism capable of installing the spectacle frame F more stably is provided. For example, FIG. 10A shows a configuration in which the bottom of the display cover 2a is provided with a pedestal 60 capable of contacting the left and right rims FRL and the lower ends of the FRR in the spectacle frame F. Further, for example, FIG. 10B has a configuration in which a pedestal 61 on which a pad of the spectacle frame F can be placed is provided on the bottom of the display cover 2a. As described above, for example, a display cover provided with a pedestal in which the spectacle frame F can be installed more stably may be used. Of course, these pedestals may have a removable configuration. Alternatively, for example, a pedestal capable of contacting the left and right rims and pads of the spectacle frame F may be configured to be usable as needed. In this case, for example, as shown in FIG. 10C, a configuration in which a pedestal for abutting the left and right rims and pads of the spectacle frame F is attached to the lens meter 1 can be mentioned. For example, the examiner slides such a pedestal in the direction of the arrow only when measuring the distance between the marking points given to the left and right lenses LE. If the spectacle frame F is held by both the temple adjusting unit 10 and the pedestal or the like, the spectacle frame F can be stably installed by the lens meter 1.

In this embodiment, the temple adjustment unit 10 has the lower end of the spectacle frame F below the display 2, the upper end of the spectacle frame F above the display 2, and the left and right temples of the spectacle frame F on the back side of the display. The configuration that is arranged in is described as an example, but the present invention is not limited to this. The installation direction of the spectacle frame F may be different from that of the present embodiment. For example, the lower end of the spectacle frame F is above the display 2, the upper end of the spectacle frame F is below the display 2, and the left and right temples of the spectacle frame F are arranged in the temple adjustment unit 10 arranged on the back side of the display 2. It may be. Further, for example, the lower end of the spectacle frame F is arranged below (or above) the display 2, the upper end of the spectacle frame F is above (or below) the display 2, and the left and right temples of the spectacle frame F are arranged on the front side of the display 2. It may be configured so that it is arranged in the temple adjusting unit 10 (the temple is arranged so as to face the examiner side).

In this embodiment, it is more preferable that the layout of the display screen of the display 2 can be changed when the temple adjustment unit is provided on the front side. In this case, for example, the lens meter 1 may include a configuration including a layout change switch. The layout change switch is used to input a change signal for changing the layout on the display screen of the display 2. For example, when the examiner selects the layout change switch, the layout change switch sends a change signal. For example, the control unit 30 changes the layout of the display screen of the display 2 based on the received change signal. For example, as a layout change on the display screen of the display 2, the control unit 30 integrally inverts the front and back of the scale 40, the PD reference index movement switch 53, the PD reference lines 54L, 54R, and the like. As a result, the examiner can align the left PD reference line 54L with the left lens LE side and the right PD reference line 54R with the right lens LE side regardless of the installation direction of the spectacle frame F.

More specifically, for example, when the spectacle frame F is installed in the temple adjusting unit 10 so that the left and right temples face the back of the lens meter 1 and the lower ends of the left and right rims face the upper side of the display 2, the left lens LE side. The right PD reference line 54R must be aligned with the right lens LE side, and the left PD reference line 54L must be aligned with the right lens LE side. In this state, there is a possibility of causing an erroneous operation such as misreading the one-eye PD of the left lens LE and the one-eye PD of the right lens LE. Therefore, the examiner selects the layout change switch and inverts the front and back of the scale 40 and the like displayed on the screen of the display 2. As a result, the left PD reference line 54L is displayed on the left lens LE side, and the right PD reference line 54R is displayed on the right lens LE side. As described above, if the lens meter has a configuration for changing the layout on the display screen of the display 2, it is possible to prevent an erroneous operation by the examiner. In addition, for example, the layout change of the display screen on the display 2 may be performed by the examiner operating the layout change switch or the like as described above. Further, for example, the layout of the display screen on the display 2 may be changed automatically by the lens meter 1 detecting the installation direction of the spectacle frame F.

In this embodiment, a marking point is given to the optical centers of the left and right lens LEs, and PD is measured using the scale 40 (based on the reference line), but the present invention is not limited to this. For example, as a method for measuring PD, the examiner may read the PD by referring to the vertical line 41 of the scale 40 and the distance values displayed above and below the vertical line 41. In this case, for example, the examiner reads the respective marking point positions given to the left and right lens LEs by using the distance numerical value displayed below the vertical line 41. Alternatively, for example, the distance numerical value displayed above the vertical line 41 is used to read the respective mark point positions given to the left and right lens LEs. In this way, the examiner can acquire the PDs of the left and right lens LEs.

Further, for example, as a PD measuring method, a PD may be calculated by automatically reading a stamp point. In this case, for example, the examiner installs the spectacle frame F to which the lens LE with the stamp point is attached on the temple adjustment unit 10. Then, for example, by adjusting the width between the contact portions 13, the distance between the temples in the spectacle frame F is adjusted to the distance in the spectacle wearing state. For example, in the above state, the control unit 30 detects the left and right marking points by analyzing the images of the left and right lens LEs, and calculates the distance between the detected left and right marking points to obtain the PD. You may measure. For example, as a configuration for acquiring an image of the lens LE, the image may be acquired by the measurement optical system 20. In this case, for example, the temple adjusting unit 10 may be arranged below the nose piece 4. Further, for example, as a configuration for acquiring an image of the lens LE, a photographing optical system may be separately provided.

Further, for example, as a PD measurement method, PD is measured by detecting the optical centers of the left and right lens LEs with the measurement optical system 20 of the lens meter 1 and calculating the distance between the left and right optical centers. It may be. In this case, for example, the control unit 30 detects the optical centers of the left and right lens LEs by the measurement optical system 20. More specifically, for example, when measuring the optical characteristics of the lens LE with the spectacle frame, the spectacles so that the lower ends of the left and right rims of the spectacle frame F abut on the lens table 6 and the left and right temples face downward. The frame F is placed on the nose piece 4. In this case, for example, the temple adjusting unit 10 may be arranged below the nose piece 4. With a lens meter having such a configuration, it is possible to obtain the optical characteristics of the lens LE in a state where the frame shape is deformed into a state of wearing spectacles, and it is possible to detect the position of the optical center. For example, when detecting the position of the optical center of the lens LE, the examiner may detect the optical center by moving (aligning) the lens LE, or the lens LE and the measurement optics are automatically detected. The optical center may be detected by adjusting the relative position of the system 10. For example, when the control unit 30 detects the position of the optical center of the left and right lens LE, the control unit 30 obtains the PD based on the positional relationship of the respective optical centers. For example, the distance between the optical center position of the left lens and the optical center position of the right lens is calculated.

In this embodiment, a lens meter including a temple adjusting means and a PD measuring means has been described as an example, but the present invention is not limited to this. The technique of the present disclosure is applicable to any device including a temple adjusting means and a PD measuring means. For example, an spectacle measuring device provided with a display and measuring PD of the spectacle frame, a holding means for holding the spectacle frame, which abuts on at least one of the left and right temples of the spectacle frame and at least one of the left and right temples. A device including a holding means for changing the width between the left and right temples by moving the position of the temple, and a PD measuring means for displaying a scale for measuring PD of the spectacle frame on the screen of the display. There may be. For example, as a scale for measuring PD, a scale for the examiner to visually read the positions of the marking points on the lens surfaces of the left lens and the right lens attached to the spectacle frame in the left-right direction. It may be. Further, the scales may have different configurations.

The technique in the present disclosure is not limited to the case where it is applied to the lens meter in the present embodiment. For example, a measurement optical system for measuring optical characteristics by a phase difference method can be applied to the measurement optical system of the lens meter in this embodiment. Further, for example, a measurement optical system for measuring optical characteristics over a wide range of the lens LE can be applied to the measurement optical system of the lens meter in this embodiment (for example, Japanese Patent Application Laid-Open No. 2002-534665). See publication).

1 Lens meter 2 Display 10 Temple adjustment unit 11 Rotating knob 13 Moving part 14 Contact part 30 Control part 31 Memory 40 Scale

Claims (3)

A measurement optical system that measures the optical characteristics of a lens,
A display that displays the measurement results and
It is a lens meter equipped with
A holding means for holding the spectacle frame in the shape of the spectacles worn by the wearer, the left and right abutting portions that abut at least a part of the left and right temples of the spectacle frame, and the left and right abutting portions. A holding means having a contact portion moving means for moving at least one position of the portion and setting at least one position of the left and right contact portions to a predetermined position.
A PD measuring means for measuring the PD of the spectacle frame held by the holding means, and
Have,
A lens meter characterized in that the width between the left and right temples is changed to a width based on the predetermined position by bringing the left and right temples into contact with the left and right contact portions . In the lens meter of claim 1,
An acquisition means for acquiring the head width information of the wearer is provided.
The contact portion moving means moves at least one position of the left and right contact portions based on the head width information acquired by the acquisition means, and the width between the left and right temples is set by the wearer. A lens meter characterized by changing to the head width . A spectacle measuring device equipped with a display and measuring the PD of the spectacle frame.
A holding means for holding the spectacle frame in the shape of the spectacles worn by the wearer, the left and right abutting portions that abut at least a part of the left and right temples of the spectacle frame, and the left and right abutting portions. A holding means having a contact portion moving means for moving at least one position of the portion and setting at least one position of the left and right contact portions to a predetermined position.
A PD measuring means for displaying a scale for measuring the PD of the spectacle frame on the screen of the display, and
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An eyeglass measuring device characterized in that the width between the left and right temples is changed to a width based on the predetermined position by bringing the left and right temples into contact with the left and right contact portions .