KR200471540Y1 - Apparatus For Measuring The Optical Center - Google Patents

Abstract

The present invention relates to a pupil-center measuring instrument for detecting a relationship between an optical center point and a pupil center of a subject wearing glasses. His composition is; A pedestal 10 of an area capable of covering the lens 102 of the spectacles; Clamp means (20) for allowing the pedestal (10) to be fixed to the front surface of the lens (102) of the glasses; Moving plates (30, 30 ') mounted to the pedestal (10) to move up and down or left and right on the pedestal (10); Slit portions (32, 32 ') which are provided in a line shape in the center of the moving plate 30, the light transmittance is different from the moving plate (30, 30'); It characterized in that it comprises a; guide means for allowing the movable plate (30, 30 ') to move up and down or left and right on the pedestal (10).

Description

Pupil Center Measuring Apparatus {Apparatus For Measuring The Optical Center}

The present invention relates to a measuring device, and more particularly, to a pupil-center measuring device for detecting a relationship between an optical center point and a pupil center of a subject wearing glasses.

The eyeglasses are completed by measuring a user's eyesight, selecting a lens, and then cutting the lens onto the eyeglass frame selected by the user and fitting the lens to the eyeglass frame. Here, the optical center of the lens and the pupil center of the wearer should coincide with each other to protect the wearer's eyesight, such as to obtain a clear view and to eliminate problems such as dizziness and stiff neck. That is, the focal point of the lens should be located within the direction of the user's eyes.

In order to match the optical center of the lens and the pupil center of the wearer, the focus of the lens and the direction of the user's eyes should be measured and compared. The focus of the lens is easily known and can be indicated on the lens by dots or lines. However, since the user's gaze is due to the physical characteristics of the individual, a separate measurement is required. The eye direction of the individual can be displayed on the glasses worn as the optical center point (OH) and the pupil center distance (PD). Then, it is possible to determine where the pupil center is on the currently selected eyeglass frame. By cutting and fitting the lens accordingly, the optical center of the lens and the wearer's pupil center can be matched, and the distance between the pupil center points can be measured. do.

Korean Patent Publication No. 10-2012-0049605 has been proposed as a conventional technique for determining the position of the pupil center of a subject. It relates to a system that automatically detects pupil position through mathematical algorithms and computer systems. In addition, the construction of such a system is very costly, and a mechanism for easy measurement of the pupil center point is required.

Eyeglasses have been an important function as a part of fashion beyond function, and accordingly, eyeglass frames of various sizes and shapes are spreading. Therefore, further efforts are needed to accurately identify the pupil center and to focus the lens. In particular, in the design of progressive lenses, the distance between the pupil center distance (PD) and the optical center point (OH) is different from each other. Therefore, a means for accurately and easily measuring them is required.

Republic of Korea Patent Publication No. 10-2012-0049605

An object of the present invention for the above problems is to provide a tool for matching the optical center of the lens and the pupil center of the wearer so as to protect the eyesight of the user of the glasses and to properly demonstrate the function of the glasses. More specifically, an object of the present invention is to provide a simple mechanism for accurately and easily detecting at which point the pupil center point is located on the spectacle frame being worn.

The above object is, as an area to cover the lens of the eyeglasses having a form of plate or rim (rim); Clamp means for fixing the pedestal to the front surface of the lens of the glasses; A moving plate installed on the pedestal so as to move vertically or horizontally on the pedestal; A slit portion provided in a line shape at the center of the moving plate and having a light transmittance different from the moving plate; And a guide means for allowing the movable plate to move up and down or left and right on the pedestal.

According to a feature of the present invention, the moving plate is an opaque or translucent plate material, the slit portion may be in the form of a hole that is narrowly drilled in the moving plate.

According to another feature of the present invention, the movable plate is transparent or translucent, and the slit portion may be an opaque line formed on the upper surface of the movable plate.

According to another feature of the present invention, the pupil center measuring mechanism is configured in a pair to be respectively installed on both lenses of the glasses, it may be connected to each other by a connecting table.

The pedestal may be provided with a scale for measuring the position of the moving plate.

According to yet another feature of the present invention, the guide means includes a side plate and a rear plate which are integrally installed at the edge of the movable plate so that the cross section becomes U-shaped so that the guide can be fitted into the pedestal. can do.

According to the above configuration, the slit portion is positioned at the moment when the subject is not visible at any moment by using the slit portion while moving the movable plate up and down or left and right while the support plate is fixed on the lens of the glasses. By marking the points, a means for measuring the pupil center is provided. This is a self-contained measurement method with the help of the examinee. The measurement process is not difficult and the configuration of the instrument is very simple, so that the pupil center can be measured easily and accurately. Therefore, it helps to make the glasses accurately, and furthermore, it is possible to determine and correct the abnormality of the focus of the glasses currently worn.

1 is a perspective view of a pupil center measuring instrument according to an embodiment of the present invention, Figure 2 is a front view of its use state.
Figure 3 is a longitudinal sectional view of the state of use of the pupil center measurement mechanism according to an embodiment of the present invention.
4 is a front view of a state of use of the pupil center measuring instrument according to another embodiment of the present invention.
5 is a front configuration diagram of a state of use of the pupil center measuring mechanism according to another embodiment of the present invention.
Figure 6 is a perspective view of the pupil center measurement mechanism according to another embodiment of the present invention.
Figure 7 is a front configuration diagram illustrating a moving plate guide means of the pupil center measuring mechanism according to another embodiment of the present invention.
8 is a perspective view of a pupil center measuring instrument according to another embodiment of the present invention.
9 is a partial perspective view of the pupil center measurement apparatus according to another embodiment of the present invention.
10 is a perspective view of a moving plate of the pupil center measuring apparatus according to another embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings attached hereto. First, an embodiment of the present invention will be described with reference to FIGS. 1 to 4, and FIGS. 5 to 10 will be referred to where necessary.

The spectacles 100 include a spectacle frame 101 and a spectacles leg 102 for fixing the lens 102. The present invention relates to a mechanism for determining the point of pupil center in the glasses 100 he is currently wearing through the cooperation of the subject.

By finding the pupil center, the focal position of the lens 102 installed in the glasses can be determined. Furthermore, it is also possible to determine whether the focus of the lens 102 of the glasses currently being worn is correct.

The pupil center measuring device of the present invention is selectively fixed to the front of the lens 102 to cover the lens 102 of the glasses. As shown in FIG. 1, the pupil center measuring mechanism is configured in pairs and installed at both lenses simultaneously (both eyes), but as shown in FIG. 6, it may be installed only at one side (monocular). In the case shown in Figure 6, one side should be measured first and then moved to the other side. As shown in FIG. 1, when the pupil center measuring apparatus is configured in a pair, they may be connected to each other by the connecting table 11 to have a shape similar to glasses.

The pupil center measuring mechanism includes a pedestal 10 in which the moving plates 30 and 30 'are movable up, down, left and right, and clamp means 20 for fixing the pedestal 10 to the glasses 100. Include. The moving plates 30 and 30 'are provided with slit portions 32 and 32'.

The pedestal 10 has an area that can completely cover the lens 102 of the glasses. The pedestal 10 is preferably in the form of a rectangular rim in which the hole 15 is provided at the center as shown in each drawing. This is because the closer the distance between the lens 102 and the moving plate 30, 30 'is, the more accurate the measurement value can be obtained. However, the present invention is not limited thereto, and may be a plate having no hole curved to a curvature similar to that of the lens 102.

The clamp means 20 allows the pedestal 10 to be fixed to the front of the lens 102 of the glasses. A wide variety of clamp means 20 can be envisioned. It is shown that it includes two levers 21 and 22 which are elastically retracted by springs 24, like conventional clamps or tongs. The pedestal 10 may be fixed to one lever 21. Holding the other lever 22 by hand and spreading it, inserting the spectacle frame 101 between the levers 21 and 22, and then releasing the hand, the levers 21 and 22 grip the spectacle frame 101 with elastic force, and thus the pedestal ( 10) is fixed to the front of the lens 102 of the glasses. The lens 102 may or may not be present in pupil center measurement. In each of the drawings, only the case where the lens 102 is fitted is illustrated.

Although the clamp means 20 in the form of tongs is shown in the accompanying drawings, it is not necessarily limited thereto, and may be used by binding with a rubber band to fix it or attaching it with an adhesive tape. In addition, the shape of the clamp means 20, the installation position and the number of installation may vary.

The moving plates 30 and 30 'are installed on the pedestal 10 so as to move up and down or left and right on the pedestal 10. 1 to 2 illustrate a state in which the moving plate 30 moves up and down, and FIG. 4 illustrates a state in which the moving plate 30 'moves left and right. In either direction, the principle is the same. When moving up and down, it is to measure the vertical height of the pupil center, and moving to the left and right is to measure the center position in the left and right direction of the pupil center.

First, the movable plate 30 for height measurement is installed on the pedestal 10 to measure the height, and then the movable plate 30 'for measuring the center position in the left and right directions is installed and replaced on the pedestal 10. Measure the center position in the direction.

The guide means allows the movable plates 30 and 30 'to be moved up and down or left and right on the pedestal 10. The guide means is formed integrally with the front plates 31 and 31 'at the edges of the front plates 31 and 31' so that the cross section becomes U-shaped so that the guide 10 can be fitted into the pedestal 10 by a clip. It may include a side plate 33. As shown in FIG. 6, the pressing protrusion 33a protrudes inward to press the pedestal 10 to the rear plate 33a connected to the side plate 33 so as not to slide easily. 1 to 2, the side plate 33 is provided with a protrusion 37 in the form of a protrusion for easily moving the moving plate 30. The handle 37 of FIG. 4 is also for the same function.

In another embodiment of the guide means is rotatably installed on one side plate 33 of the moving plate 30, as shown in Figure 7, which is in contact with the side portion 16 provided on the side of the pedestal 10 It may include a wheel 35. The wheel shaft 36 serving as the center of rotation of the wheel 35 is provided on the side plate 33. The wheel shaft 36 is connected to the handle 37 of the roller shape that can be held by the finger. When the handle 37 is used, the movable plate 30 can be moved up and down easily and precisely. Gears may be provided on the circumferential surface of the wheel 35 and the side portions 16 of the pedestal, respectively, like racks and pinions. According to this configuration, it is possible to raise and lower the moving plate 30 more easily and stably.

In this manner, various methods for linearly moving the moving plates 30 and 30 'on the pedestal 10 may be employed. For example, a rail may be provided on the pedestal 10 and the movable plates 30 and 30 'may be moved along the extension direction of the rail while being coupled to the rail. For example, as shown in FIG. 9, the rail groove 17 is installed on the inner wall surface of the hole 15 so that the movable plate 30 can be started up and down in a state of being fitted into the rail groove 17. It may be. In this case, it is possible to obtain the effect that the moving plate 30 is in close contact with the lens.

On the other hand, the slit portions 32, 32 'and slit portions are provided in the form of lines in the center of the moving plates 30 and 30'. The slit portions 32 and 32 'are different in light transmittance from the movable plates 30 and 30' so that they can be visually identified. For example, when the moving plates 30 and 30 'are translucent or opaque, the slit portions 32 and 32' may be transparent. In addition, when the moving plates 30 and 30 'are transparent, the slit portions 32 and 32' may be opaque. According to each embodiment of the present invention, the former case is used. That is, the moving plates 30 and 30 'are opaque or translucent, and the slit portions 32 and 32' are formed to be thin through. The width of the slit portions 32 and 32 'may be 0.5 to 5 mm. As shown in FIG. 3, when the pupil E of the subject coincides with the height of the slit part 32, the line of sight L passes through the gap of the slit part 32, so that the examinee passes over the lens 102. Be able to identify objects or lights.

8 shows another embodiment of the present invention, and moving plates 30 and 30 'may be installed at the same time. In this case, the height of the pupil center and the center of the pupil center in the left and right directions can be more conveniently measured.

In addition, the movable plate 30 may distinguish the fixing part 30a and the front plate 31 as separate materials as shown in FIG. 10. The front plate 31 is in the form of a thin film, the fixing portion 30a may be made of a synthetic resin having a rigidity and thickness. This is for enhancing the measurement accuracy by bringing the front plate 31 into close contact with the lens. Other reference numerals may be referred to as described above.

Referring to the actual measurement process according to this embodiment is as follows.

The measurer installs the pupil center measuring device of the present invention on the glasses or the frame. And as shown by the arrow (W) in FIG. 2, the moving plate 30 is slowly moved from the bottom to the top or top to bottom. Then, the object located in front of the subject is made invisible or blurred by the opaque or translucent moving plate 30. Subsequently, if the moving plate is moved in the same direction, the subject moves the object forward through the slit part 32 at the moment when the height of the slit part 32 and the pupil E coincides (that is, the moment corresponding to FIG. 3). Can be identified. At this moment, when the subject gives a signal to the measuring person, the measuring person checks the height of the slit part 32 at that moment. Thereby, the height of the pupil E of one eye is measured. Check the pupil height of the other eye using the same method.

And as shown in Figure 4 is installed on the base 10 to replace the moving plate 30 for measuring the center position in the left and right direction of the pupil. Then, the moving plate 30 is gradually moved from left to right or from right to left. Then, at some point, the field of view is obscured by the moving plate 30 'so that the front object may be invisible or blurry. ') Allows you to identify things in front of you. At this moment, the subject sends a signal to the operator to measure the position. Similarly, check the central position of the pupil of the opposite eye in the right and left directions.

In this case, a horizontal line is obtained by measuring the height of the pupil using the slit part 32 in the horizontal direction, and a vertical line is obtained by measuring the left and right centers of the pupil using the vertical slit part 32 '. The intersection point of the horizontal line and the vertical line (K, see FIG. 5) is the position of the pupil center. It is desirable that the position of the pupil center coincide with the focal point of the glasses currently worn.

The horizontal scale 12 and the vertical scale 13 may be provided on the support plate 10 so as to measure the position of the horizontal line and the vertical line, respectively. The measurer may read the horizontal scale 12 and the vertical scale 13, respectively, and record the position of the horizontal line and the vertical line, or mark the moving plate 30 with an aqueous pen or a pencil.

As shown in FIG. 6, a pen may be inserted into the slit part 32 having a hole shape and displayed directly on the lens of the glasses. In this case, the moving plate shall be provided in the form of a frame with a hole in the center. In the absence of the lens 102, the intersection point K may be obtained by marking the bar bars 101a, 101b, 101c, and 101d constituting the spectacle frame 101.

The above description is only a few examples based on the technical idea of the present invention. Those skilled in the art will recognize that various modifications may be made by those skilled in the art without departing from the scope and spirit of the invention as expressed in the claims. For example, all of the above-described embodiments may be freely combined and practiced by those skilled in the art, and any combination thereof should be construed as being included in the scope of the present invention.

10: pedestal 11: connecting rod
12, 13: Scale 20: Clamping means
21, 22: lever 30, 30 ': moving plate
31, 31 ': Front panel 32, 32': Slit section
33: side plate 34: pressing protrusion
35: wheel 37: handle
100: glasses 101: glasses frame
102 lens 103 glasses leg
E: pupil K: intersection

Claims (4)

A rectangular stand having a hole formed in a center thereof, the area of which covers the lens of the glasses;
Clamp means for fixing the pedestal to the front surface of the lens of the glasses;
It is installed on the pedestal so as to move up and down from one side of the pedestal, the front plate which is in contact with the front of the pedestal, and formed on both side ends of the front plate, respectively, and formed in a direction orthogonal to the front plate side of the pedestal A moving plate having a side plate in contact with the side plate and a rear plate formed at one end of the side plate and being formed parallel to the front plate to be in contact with both rear ends of the pedestal; And
A slit portion provided in a line shape at the center of the moving plate and having a light transmittance different from the moving plate; Lt; / RTI >
The inner side of the back plate is provided with a pressing protrusion protrudes to provide an anti-slip function,
The pupil center measuring mechanism, characterized in that the light transmittance is different from the moving plate for easy visual identification of the slit.
A pedestal having gear teeth formed at both sides thereof in a quadrangular shape having a hole formed at a center thereof as an area capable of covering the lens of the glasses;
Clamp means for fixing the pedestal to the front surface of the lens of the glasses;
It is installed on the pedestal so as to move up and down from one side of the pedestal, the front plate which is in contact with the front of the pedestal, and formed on both side ends of the front plate, respectively, and formed in a direction orthogonal to the front plate side of the pedestal A moving plate having a side plate spaced apart from and a rear plate formed at one end of the side plate, the rear plate being formed parallel to the front plate and contacting both rear ends of the pedestal;
A slit portion provided in a line shape at the center of the moving plate and having a light transmittance different from the moving plate;
A wheel disposed through the side plate of one of the side plates, the wheel shaft being the center of rotation being rotatably coupled to the side plate, and having a gear tooth formed on an outer circumferential surface thereof so as to rotatably contact the gear tooth of the pedestal; And
A handle coupled to the wheel shaft; Pupil center measuring apparatus comprising a.
An area for covering the lens of the glasses and having a hole formed at the center thereof, a pedestal having rail grooves formed at both inner wall surfaces of the inner wall surfaces of the hole;
Clamp means for fixing the pedestal to the front surface of the lens of the glasses;
A moving plate having both sides coupled to the rail grooves to be elevated; And
A slit portion provided in a line shape at the center of the moving plate and having a light transmittance different from the moving plate; Pupil center measuring apparatus comprising a.
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