JPS627284Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a measuring device for measuring the distance between pupils and the relative position between the eyeglass frame and the pupil when the eyeglass frame is worn.

Generally, when glasses are worn, it is necessary that the optical center of the glasses lens is aligned with the center of the wearer's pupil. For this reason, when attaching eyeglass lenses to eyeglass frames, the distance between the pupils is measured,
Conventionally, a method has been used to determine the positional relationship between the eyeglass frame and the center of the pupil from this value and the size of the eyeglass frame. Another method is to take a photograph of both eyes while wearing a spectacle frame, and then measure the position between the spectacle frame and the center of the pupil from this photograph. Although the former method is simple, the measurement accuracy is insufficient and conversion is time-consuming and troublesome, while the latter method is highly accurate but time-consuming and cannot be easily measured.

An object of the present invention is to provide a device that can easily and accurately measure the interpupillary distance and the positional relationship between the eyeglass frame and the center of the pupil.

Hereinafter, the present invention will be explained based on examples. FIG. 1 is a schematic cross-sectional view of a first embodiment of the present invention.

The box body 1 has a first wall surface 11 and a second wall surface 12 that face each other in parallel. A nose pad 22 is provided in the center of the first wall surface 11 for regulating the position of the subject's face 21, and on both side walls of the nose pad 22, the nose pad 22 is provided for observing both eyes of the subject. Two openings are provided, into which transparent dustproof plates 23 and 24 are fitted, respectively.
Further, an observation opening 36 for observation by the examiner 38 is provided in the center of the second wall surface 12, and a transparent dustproof plate is also fitted here. And box 1
Two collimator lenses 30 and 31 that respectively converge the light beams from the two apertures on the first wall surface 11 are provided inside the lens, and their respective optical axes are perpendicular to the first wall surface 11 and parallel to each other. and a first reflecting mirror 3 for reflecting the light beams that have passed through these collimator lenses and guiding them to the observation aperture 36.
2, 33 and second reflecting mirrors 34, 35 are provided. The observation aperture 36 has two collimator lenses 3
This almost coincides with the focal positions of 0 and 31. Furthermore, a first scale plate 2 is provided between the first wall surface 11 and the two collimator lenses 30 and 31.
5 and the second scale plate 26 are respectively connected to the first wall surface 1
1, and both can be moved parallel to the first wall surface by operating from the outside of the box 1 using knobs 25a and 26a, respectively, i.e., left and right (up and down in the figure) as seen from the examiner. It is.

In addition, as shown in the plan view of FIG. 2 and the elevation view of FIGS. 3 and 4, a nose pad 22 is provided on the top surface of the box 1 to align the box 1 and the subject's face. In addition, a forehead rest is provided. The left and right forehead rests 45 and 46 provided on the two arms 43 and 44 supported by shafts 41 and 42, respectively, are fitted into the grooves 48 by rotating the knob 47 to loosen the tightening by the screws (not shown). By moving the box 1 with
It is adjustable. FIG. 3 shows how only the interpupillary distance of the subject is measured, and FIG. 4 shows how the positional relationship between the center of the pupil and the spectacle frame 20 is measured with the subject wearing the spectacle frame 20. It shows the state of time. As shown in FIG. 4, the nose pad 22 has a shaft 22a.
It is rotatable around the center, and can be retracted to the bottom surface of the box 1 so as not to interfere with the eyeglass frame.

Now, one of the two dustproof plates 23 and 24 provided on the first wall surface 11, here the dustproof plate 23 on the right side as seen from the examiner 38, is located from the center of the nose pad 22 as shown in the plan view of FIG. It has a pupil distance scale S ₀ of . As shown in the plan view of FIG. 6, the first scale plate 25 has a first vertical cursor line K ₁ and a first horizontal cursor line K ₁ ' perpendicular thereto, and also has a first vertical cursor line K _{1 .} The first vertical cursor line K ₁ is the same as the interpupillary distance scale S ₁₀ indicating the horizontal distance of
the first horizontal cursor line to indicate the horizontal distance from
It has a distance scale _S11 for eyeglass frames provided on _K1 '. As shown in the plan view of FIG. 7, the second scale plate 26 has a second vertical cursor line K ₂ ′ and a second horizontal cursor line K ₂ ′ perpendicular thereto, and further includes a second horizontal cursor line K 2 ′. ₂ ', a distance scale _S21 for the eyeglass frame is provided for indicating the horizontal distance from the second vertical cursor line _K2 . Here, the first and second horizontal cursor lines K ₁ ′ and K ₂ ′ of the first scale plate 25 and the second scale plate 26 are observed redundantly by the examiner, and are substantially the same. It can be considered as a straight line.

In such a configuration, the examiner first aligns both the pupil centers of the subject 21 with the first and second horizontal cursor lines K ₁ ', K ₂ ' using the forehead rests 45, 46 and, if necessary, the nose rest 22. Align the device to match the top. At this time, since the observation aperture 36 is approximately at the focal point of the two collimator lenses 30 and 31, the examiner observes both eyes of the subject from approximately infinity. And the examiner is the knob 25a
Move the first scale plate 25 left and right to align the first vertical cursor _K1 with the center of the pupil of the subject on the right side, and then use the knob 26a to move the second vertical cursor K1 on the second scale plate 26. The second scale plate 26 is moved so that the line _K2 coincides with the center of the pupil of the subject on the left side. It goes without saying that the order in which the first scale plate and second scale plate are operated does not matter. When these operations are completed,
The condition of the examinee's eyes and eyeglass frames, as well as each distance scale within the field of view observed by the examiner, is as shown in FIG. 8, for example.

In the state shown in Fig. 8, if the position of the second vertical cursor line _K2 on the interpupillary distance scale _S10 is read, this is the interpupillary distance of the subject, and the second vertical cursor line K2 on the interpupillary distance scale _S10 is read. 1. If the position of the vertical cursor line _K1 is read, this is the distance from the center of the subject's nose (face) to the center of the right pupil. The distance from the center of the nose to the center of the left pupil can be immediately determined from the above two values. Furthermore, on the right and left sides of the observation field,
By reading the position of the eyeglass frame on the eyeglass frame distance scale (S ₁₁ and S ₂₁ ), you can calculate the horizontal distance between the right and left pupil centers of the subject and the nose side of the eyeglass frame on each side. You can know.

In this embodiment, two collimator lenses 30 and 31 are provided to observe the left and right eyes of the subject, and these observation lights are guided to the observation aperture 36 by being reflected twice. Because of this, the device is small and lightweight. Also, the first and second
The knobs 25a and 26a of the scale plates 25 and 26 partially protrude from the bottom of the box 1 as shown in FIGS. 3 and 4, respectively, and the examiner moves each scale with his thumb while holding this device with both hands. Easy to operate.

When grinding the periphery of a spectacle lens, generally the geometric center of the spectacle frame is determined and the rotation axis of the peripheral material is set on the corresponding lens surface. It is necessary to measure the positional relationship with the center, and for this purpose the relative position between the eyeglass frame and the pupil center, that is, the optical center, is measured. As in the above-mentioned embodiment, it is possible to attach the lens accurately by measuring only the horizontal distance between the eyeglass frame and the center of the pupil.
Accuracy can be increased by also measuring the vertical distance.

Such a device is the second embodiment, and here, as shown in the plan view of FIG. 9, the first scale plate 25' has each distance scale S ₁₀ , In addition to S ₁₁ , a distance scale S ₁₂ is provided along the first vertical cursor line K ₁ indicating the vertical distance from the first horizontal cursor line K ₁ '. Further, as shown in the plan view of FIG. 10, in addition to the distance scale _S21 of the second scale plate 26 of the first embodiment, the second scale plate 26' also has a second vertical cursor line _K2 . A distance scale _S22 is provided which indicates the vertical distance from the horizontal cursor line _K2 '. According to this embodiment, the observation field is as shown in Fig. 11, and if the positions of the eyeglass frames on the distance scales _S12 and _S22 are read in the right and left fields of view, respectively, the positions of the eyeglass frames in the right and left fields can be determined in the vertical direction. You can find out the distance between the center of the pupil and the eyeglass frame.

Two movable scale plates are installed, so
The interpupillary distance can be easily measured by simply aligning the centers of the left and right crosshairs with the pupils.

Since the measurement can be performed with the subject wearing the eyeglass frame, the positional relationship between the eyeglass frame and the center of the pupil can be easily measured.

Since the collimator lens is installed, the examiner can see the eye to be examined, the pupil distance scale S ₀ , and the first vertical cursor line.
K ₁ , first horizontal cursor line K ₁ ′, interpupillary distance scale S ₁₀ , distance scale for eyeglass frames S ₁₁ , second vertical cursor line K ₂ , second horizontal cursor line K ₂ ′, distance scale for eyeglass frames S ₂₁ can be clearly seen.

Since the examinee can see the examiner's eyes appearing in the observation aperture through each collimator lens, the viewpoint is fixed and measurement accuracy is increased.

Even if the body frame is removed from the position where the subject's left and right eyes are observed, the pupil distance and interpupillary distance are preserved.

[Brief explanation of the drawing]

Fig. 1 is a schematic sectional view of the first embodiment of the present invention, Fig. 2 is a plan view of the first embodiment, Figs. 3 and 4 are elevational views of the first embodiment, and Fig. 5 is a schematic cross-sectional view of the first embodiment. FIG. 6 is a plan view of one of the dustproof plates of the first embodiment, FIG. 6 is a plan view of the first scale plate of the first embodiment, FIG. 7 is a plan view of the second scale plate of the first embodiment, and FIG. FIG. 9 is a plan view of the first scale plate of the second embodiment of the present invention;
FIG. 10 is a plan view of the second scale plate of the second embodiment, and FIG. 11 is a diagram similar to FIG. 8 regarding the second embodiment. Explanation of the symbols of the main parts, first wall...11, dustproof plate...23, 24, nose pad...22, second wall...12, observation aperture...36, collimator lens...30, 31 , first scale plate...2
5. Second scale plate...26.

Claims (1)

[Claims for Utility Model Registration] A first wall surface in which two openings for observing the right and left eyes of a subject are each provided with a transparent dustproof plate, and a first wall surface provided substantially parallel to the first wall surface; a second wall surface having observation openings for the examiner to observe the left and right eyes of the subject through the dustproof plate; two collimator lenses having a back focal position are disposed in the observation aperture so as to face each of the two openings of the first wall surface between the two collimator lenses and the first wall surface; A first scale plate and a second scale plate are superimposed parallel to the first wall surface and movably in the direction in which the two openings are arranged side by side, and further, on one of the dustproof plates, A pupil distance scale _S0 provided to indicate the distance from the center of the two apertures, a first vertical cursor line _K1 provided on the first scale plate, and a horizontal line from the first vertical cursor line An interpupillary distance scale S ₁₀ and an eyeglass frame distance scale S ₁₁ provided on the first scale plate to indicate distance; a second vertical cursor line K provided on the second scale plate; and the second vertical cursor line K provided on the second scale plate. A pupil position measuring device comprising: a distance scale _S21 for eyeglass frames provided on the second scale plate so as to indicate a horizontal distance from a vertical cursor line.