JP2002311396A - Layout mark of progressive multifocus lens and method for checking the lens - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the layout mark of a progressive multifocus lens and a method for checking the progressive multifocus lens which can be used for progressive multifocus lenses having different inset values in common and prevents a mark from obstructing the measurement of frequency, etc. SOLUTION: A distal part measurement area mark 7 and a proximal part measurement area mark 9 consist of a distal part circular arc mark 72 obtained by removing a part of a circle for showing a frequency measurement area and the mark of composite figures obtained by respectively composing the height position mark of a distal eye point consisting of a straight line and the height position mark of a proximal eye point.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to a layout mark of a progressive multifocal lens used for spectacles and a method of checking the progressive multifocal lens using the layout mark.

[0002]

2. Description of the Related Art Generally, a progressive multifocal lens for spectacles is provided with a layout mark process after a manufacturing process on a lens manufacturing side, and a mark indicating an optical layout is made on the lens. This is usually erasable paint that clearly indicates the distance measurement position or near measurement position by the lens meter on the convex surface of the lens, or specifies various reference indices for framing the frame. Will be implemented as

Therefore, the display method is different depending on the lens manufacturing side and the type of the progressive multifocal lens except for the predetermined items of the distance power measuring position and the near power measuring position defined by JIS, and various marking methods are used. Have been. In particular, in recent years, progressive multifocal lenses have emerged in various types of lenses based on various design concepts that take into account eye physiological functions.
There have been proposed layout marks that can cope with the variety of optical designs.

FIG. 5 is a diagram showing an example of a layout mark of a conventional progressive multifocal lens. The layout mark shown in FIG. 5 includes a cross line 22 indicating a footing point serving as a reference when the progressive multifocal lens 21 is framed, and a circular distance measurement reference area indicating a measurement location of the power of the distance portion. A mark 24 and an oval or elliptical near-portion measurement reference area mark 26 indicating the measurement location of the power of the near portion are provided (see JP-A-2001-51241).

This layout mark has a common layout for lenses having different measurement areas because the near vision measurement reference area mark 26 has a long oval or elliptical shape extending in the left-right direction. Just by attaching a mark, the function of the mark can be demonstrated. That is, even if the progressive power lens has the same design concept, if the power is different, the inset amount (the amount of inset) is different due to the difference in the power. For this reason, the near power measurement position also changes accordingly, and when a circular mark that matches the near power measurement area is used, it is necessary to change the marking position for each lens, which is complicated. By making this into an ellipse or an ellipse, a change in the position can be absorbed while indicating the approximate area position, and the mark can be shared.

[0006]

However, it has been found that it is difficult to sufficiently meet recent various requirements even with the use of the layout mark described in Japanese Patent Application Laid-Open No. 2001-51241. That is, in order to secure the function of the near portion measurement reference area mark 26, it is not possible to make the ellipse excessively large. Then, the range of change of the inset amount is naturally regulated by it, and if it is out of the range, it cannot be applied.

A conventional layout mark is usually
Both the distance-use measurement reference area mark 24 and the near-use measurement reference area mark 26 are formed by a substantially closed curve such as a circle. The footing point is formed by the crosshair 22. Here, depending on the lens design,
In some cases, the distance measurement reference area mark 24 and the crosshair 22 at the footing point are close enough to overlap. Then, it has been found that the cross line and the line of the area mark may overlap with each other to make identification difficult, or that the cross line may enter the lens power measurement area and cause a measurement error. The present invention is to solve such a problem, and can be used in common for progressive multifocal lenses having different inset values, and in addition, a progressive multifocal lens in which a mark does not interfere with power measurement or the like. An object of the present invention is to provide a method of checking a layout mark of a lens and a progressive multifocal lens.

[0008]

Means for Solving the Problems As means for solving the above-mentioned problems, a first means is a progressive multifocal lens layout mark provided on a lens surface of the progressive multifocal lens. It has a distance measurement area mark indicating the measurement location of the power of the distance portion, and a near measurement area mark indicating the measurement location of the power of the near portion, and has the distance measurement area mark and the near portion. The measurement area mark specifies an arc-shaped curve obtained by removing a part of a circle for indicating the frequency measurement area, and a straight line indicating the height position of the distance eye point and the height position of the near eye point or this straight line. And a mark indicating two or more positions for the multi-focal lens. The second means is that the near portion measurement area mark is a wide area in which an area indicated by an arc-shaped curve for indicating the frequency measurement area can include most of a possible change range of the inset amount. It is a layout mark of the progressive multifocal lens according to the first means. The third means is that the straight line indicating the height position of the distance eye point and the height position of the near eye point is a straight line parallel to a reference horizontal line. This is a layout mark of such a progressive multifocal lens. The fourth means may be a reference vertical line mark orthogonal to the reference horizontal line and indicating a reference vertical line passing through the geometric center of the progressive multifocal lens. The layout mark of the progressive multifocal lens according to any one of the first to third means, wherein the layout mark is provided outside a region where is provided. The fifth means may be a mark indicating the position of at least two points specifying a straight line indicating the height position of the center of the near power measurement location, an arc-shaped curve of the near portion measurement area mark or the near portion. First to first features provided outside the measurement area
14 is a layout mark of a progressive multifocal lens according to any one of the fourth means. The sixth means is a progressive multifocal lens checking method for checking a progressive multifocal lens manufactured according to a prescription, wherein the progressive multifocal lens manufactured according to the prescription is any one of claims 1 to 5. With the layout mark of the progressive multifocal lens described in
Attach or correlate the layout information including the inset amount to the progressive multifocal lens, and when checking the near power of the progressive multifocal lens at the time of framing or the like, a power measuring means, The layout mark is located in the near power measurement area, and the inset amount is read from the attached layout information or the associated layout information, and the position of the power measurement unit is accurately determined according to the inset amount. This is a method for checking a progressive multifocal lens, characterized in that it is determined and measured.

[0009]

1 and 2 are explanatory views of a layout mark of a progressive multifocal lens according to an embodiment of the present invention. Hereinafter, a layout mark of a progressive multifocal lens and a method of checking the progressive multifocal lens according to the embodiment will be described with reference to FIGS. 1 and 2. The layout mark shown in FIG. 1 is obtained by painting a layout mark for indicating an optical layout on the convex surface of the progressive multifocal lens 1 for the right eye (R).

This progressive multifocal lens 1 has a distance spherical power of 0.00 (D), a near power of +3.00 (D), an addition power of 3.00 (D), and an outer diameter of 75 mm. is there. still,
The lens refractive index is 1.50.

In FIGS. 1 and 2, reference numeral 2 denotes a geometric center dot indicating the geometric center of the lens. Also,
On the left and right of the geometric center dot 2, horizontal reference lines 3 indicating a geometric horizontal position are provided by broken lines. Vertical reference line marks 4a and 4b of about 2 mm, which indicate the geometric vertical position, are respectively indicated by solid lines on the upper and lower portions in the distance portion and the near portion, respectively.

Further, above the left horizontal reference line 3,
There is an index 4 for "R", which indicates that this is a right eye lens. Also, below the index 4 of this “R”,
The character mark 5 of "V3P" is written, which is the product name of the lens maker. That is, the order lens can be confirmed by indicating the left and right sides of the lens and the lens product name.

On the distance portion 6, a distance portion measurement area mark 7 approximated to an Ω shape is displayed between the one vertical reference line mark 4a and the geometric center dot 2. The distance portion measurement area mark 7 includes distance eye point height position marks 71a and 71b indicating the height position of the distance eye point formed by a broken line, and an arc shape drawn by a part of a circle formed by a broken line. And a far-end portion arc-shaped mark 72.

The area surrounded by the distance portion arc-shaped mark 72 indicates a distance measuring point or position. The distance eye point height position marks 71a and 71b indicate the distance eye point height position. In the present embodiment, the distance eye point height position marks 71a and 71b are arranged so as to be located 4 mm above the geometric center dot 2. Further, the far-portion arc-shaped mark 72 is constituted by a part of a circle having a diameter of 8 mm.

As shown in FIG. 2, the distance portion measurement area mark 7 indicates a distance power measurement position and is written so that the height position of the distance eye point position Ie can be recognized. Then, as shown in the figure, the distance eye point position Ie can be found in combination with the vertical reference line mark 4a provided above the distance measurement area mark 7. I have.

Here, the distance eye point position Ie is said to be the most important optical index of the eyeglasses that creates one optical system by matching with the pupil of the wearer when framing the lens. For this reason, conventionally, marking has been generally performed by a direct notation method using a cross line or the like. However, as described in the section of the prior art, progressive multifocal lenses of various designs have been proposed in recent years. Among them, a lens of a design in which the distance eye point position is close to the distance power measurement position is included. Has appeared. In that case, in a direct notation such as a cross line, in distance measurement,
This mark or the like may enter the measurement area of the aperture of the lens meter having the reference aperture diameter of 6 mm specified in JIS of the spectacles, and it is assumed that the mark may interfere with the measurement.

In the present embodiment, the distance vision eye is indirectly used using the distance vision measurement area mark 7 and another vertical reference line mark 4a provided above the distance vision measurement area mark 7. The point Ie is shown. Therefore, the possibility that an obstacle such as a mark enters the measurement area of the aperture is completely eliminated.

Similar to the distance portion 6, the near portion 8 has a near shape approximate to an Ω shape larger than the distance portion 6 between the vertical reference line mark 4 b and the geometric center dot 2. The part measurement area mark 9 is marked. This near portion measurement area mark 9
Are near eyepoint height position marks 91a and 91b indicating the height positions of near eyepoints indicated by broken lines.
And near-end portion arc-shaped marks 92a and 92b drawn by arc marks having slits 10a and 10b in the center. The midpoint Ik of the straight line connecting the near eye point height position marks 91a and 91b is the near eye point position. The midpoint Ko of the straight line connecting the slits 10a and 10b is the center of the near measurement area.

The near eye point height position mark 91
In the present embodiment, a and 91b are arranged 10 mm below the geometric center dot 2. The near portion arc-shaped marks 92a and 92b are apart from the left arc 92a and the right arc by a maximum of 11.2 mm. The radius of curvature R of the arc is 4.5 mm. A relatively large area surrounded by the arc mark indicates a near power measurement location.

That is, the near portion arcuate marks 92a, 9
The near power measurement location surrounded by 2b is 6 mm in diameter.
Is considerably larger than the size of the aperture of the lens meter having the reference aperture diameter of Therefore, this mark is used to roughly determine the position of the aperture. The exact position is separately determined by the inset amount acquired as numerical information.

That is, in the present embodiment, the information of the accurate inset amount is not shown by the layout mark, but is prepared separately by the manufacturer so as to be obtained as numerical information. For example, a method of displaying the information on a lens bag or printing together with lens layout paper and placing the lens in the lens bag may be adopted. Also,
For example, the information may be read online corresponding to the serial number of the lens. This inset information can be indicated by a numerical value or the like representing a distance from the reference line, with a vertical line passing through the geometric center 2 of the lens as a reference line.

As described above, in the layout mark according to the present embodiment, the near power measuring point surrounded by the near portion arc-shaped marks 92a and 92b is located at the aperture of the lens meter having a reference aperture diameter of 6 mm in diameter. It is quite large compared to its size. Therefore, it can be used in common for lenses having significantly different inset amounts. In that case, the specific inaccuracy of the location due to the mark,
Since the correction can be made by an accurate inset amount obtained by a numerical value, accurate positioning is also possible. Furthermore, as the mark, instead of writing the whole circle, a part of it was used, or a mark that could be displayed with the minimum necessary painting, such as showing two or more points to show a straight line, was used. Thus, it is possible to effectively prevent the mark from hindering the measurement at the time of frequency measurement or the like.

Next, a method of checking the progressive multifocal lens using the layout marks according to the above embodiment will be described. First, from the lens manufacturing factory, based on the order conditions from the eyeglass shop, through the process of surface treatment, such as sanding, polishing, etc., in the state where the concave and convex surfaces are finally processed,
A circular order lens is sent with the lens power and inset amount specified in the lens bag. When shipping,
Layout marks shown in FIGS. 1 and 2 are marked on the convex side of the lens with white erasable paint.

At the spectacle shop, first, the notation (distance power, near power, addition power, etc.) of the lens bag is checked to determine whether the lens is the same as the contents of the order. Next, the lens is taken out of the lens bag, and the contents of the lens are measured with a lens meter.
The lens meter first checks the distance power. The lens is moved to the aperture section of the lens meter while looking through the lens meter, and is adjusted to the distance measuring position in the distance measuring area mark 7 of the present embodiment. Then, the distance power is checked. Next, the near power is checked.

Similarly, while looking into the lens meter, the lens is moved upward to the aperture of the lens meter,
The geometric center position is detected, and the lens is further moved in the horizontal direction by the inset amount of the lens bag, and moved in the vertical direction, and the mark of the near power measurement position within the near portion measurement area mark 9 is aligned. Then, the near power is checked. Next, edge processing is performed, and the edged processed lens is framed in a predetermined spectacle frame.

The fitting adjustment for wearing the frame is performed, and the customer wears glasses. Then, it is checked whether the lens is laid out optically correctly and the eyeglasses are completed and the distance eyepoint and the near eyepoint. The distance eye point makes the wearer look at infinity, and checks whether the pupil position is at the position of Ie. The near vision eye point allows the wearer to look near at the near work distance,
It is checked whether the pupil position is at the position of Ik. After this check is completed, wipe off the paint mark with ether or the like.

FIG. 3 and FIG. 4 are views showing modified examples of the distance measurement area mark 7 and the near measurement area mark 9. In the above-described embodiment, an example has been described in which the distance portion measurement region mark 7 and the near portion measurement region mark 9 have a shape approximate to a substantially Ω shape. However, as shown in FIGS. 3 and 4, the eye point height position marks 71a, 71
b, 91a, 91b and an arc-shaped distance part arc mark 7
The second and near portion arc-shaped marks 92a and 92b may be separated from each other. Also, the near portion arc mark 92
Instead of providing the slits 90a, 90b in the a, 92b, protrusions 90c, 90d may be provided. Further, the straight line or the curve constituting each mark may be a solid line, a dotted line, or a broken line. In this case, the straight line can be specified by two or more points.

[0028]

As described above in detail, according to the present invention, the distance measurement area mark and the near measurement area mark are formed by an arc-shaped curve obtained by removing a part of a circle for indicating the power measurement area, A straight line indicating the height position of the distance eye point and the height position of the near eye point or 2 for specifying this straight line
The mark indicating the above position and the mark of the combined figure which are respectively combined with each other make it possible to use the mark in common for progressive multifocal lenses having different inset values. And so on.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of a layout mark of a progressive multifocal lens according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a layout mark of a progressive multifocal lens according to the embodiment of the present invention.

FIG. 3 is a view showing a modification of the distance portion measurement area mark 7.

FIG. 4 is a diagram showing a modification of the near portion measurement area mark 9.

FIG. 5 is an explanatory diagram of a conventional layout mark.

[Explanation of symbols]

 Reference Signs List 1 progressive multifocal lens 2 geometric center 3 horizontal reference line 7 distance measuring area mark 9 near measuring area mark Ie distance eye point Ik near eye point

Claims (6)

[Claims] 1. A layout mark of a progressive multifocal lens applied to a lens surface of a progressive multifocal lens, wherein at least a far vision measuring area mark indicating a measurement location of a power of a far vision part, and a near vision part And a near portion measurement area mark indicating a measurement site of the power, wherein the distance measurement area mark and the near measurement area mark have an arc shape obtained by removing a part of a circle for indicating the frequency measurement area. It is a mark of a composite figure in which a curve and a straight line indicating the height position of the distance eye point and the height position of the near eye point or a mark indicating two or more positions for specifying the straight line are combined. A progressive multifocal lens layout mark characterized by the following: 2. The near portion measurement area mark is a wide area in which an area indicated by an arc-shaped curve for indicating the frequency measurement area can include most of a possible change range of the inset amount. 2. The method according to claim 1, wherein
Layout mark of progressive multifocal lens described. 3. The progressive power according to claim 1, wherein the straight line indicating the height position of the distance eye point and the height position of the near eye point is a straight line parallel to a horizontal reference line. Layout mark of multifocal lens. 4. A distance reference area mark and a near distance measurement area mark which are perpendicular to the horizontal reference line and indicate a vertical reference line passing through the geometric center of the progressive multifocal lens. The layout mark of the progressive multifocal lens according to claim 1, wherein the layout mark is provided outside a region where is provided. 5. A mark indicating at least two points for specifying a straight line indicating a height position at the center of the near power measurement location, the arc shape curve of the near portion measurement area mark or the near portion measurement. 2. The device according to claim 1, wherein the device is provided outside the region.
4. The layout mark of the progressive multifocal lens according to any one of 4. 6. A progressive multifocal lens checking method for checking a progressive multifocal lens manufactured according to a prescription, wherein the progressive multifocal lens manufactured according to the prescription is one of claims 1 to 5. Attaching or associating layout information including an inset amount to the progressive multifocal lens with the layout mark of the described progressive multifocal lens, and in the case of framing, etc. When the frequency is checked, the frequency measuring means is positioned in the near power measuring area of the layout mark, and the inset amount is read from the attached layout information or the associated layout information. Wherein the position of the power measuring means is accurately determined and measured in accordance with the set amount. Check method.