JPS5918431Y2 - device for adjusting eyeglasses - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an eyeglass adjustment device for processing and correctly inserting an eyeglass lens determined as a result of an eye examination into an eyeglass frame selected by a person who desires to wear eyeglasses.

Conventionally, in the case of distance spectacle lens adjustment, glasses are made that align the center of the subject's pupil with the center of the spectacle lens while the subject is looking at infinity.

Therefore, the position of the unshaped lens for processing is determined by the eyeglass adjustment device based on the misalignment between the geometric center of the eyeglass lens insertion portion of the eyeglasses and the center of the subject's pupil or the center of the eyeglass lens.

Conventionally, when adjusting the lenses of near vision glasses, a full-size photo is taken that shows the position of the pupil when gazing at a point at a certain working distance while wearing a frame that matches the face, and based on this photo, Alternatively, adjustment is performed using a correction plate for adjusting near vision glasses that has a central optotype for near vision determined in advance based on the interpupillary distance and working distance.

Through such adjustment, the unshaped lens is positioned for processing.

However, these adjustments have the disadvantage that they are troublesome to operate and lack sufficient accuracy.

The present invention was made to overcome the drawbacks of conventional eyeglass adjustment devices of this type, and by using optotypes consisting of a central optotype for near vision and a central optotype for left and right near vision. ,
To provide a spectacle adjustment device that is easy to operate, highly accurate, and more efficient.

The invention will now be described with reference to the accompanying drawings showing preferred embodiments thereof.

1 and 2 are a plan view and a side view showing the optical system of the eyeglass adjustment device according to the present invention, respectively, and FIG. 3 is a 1
A plan view of an optotype disk in which different types of central optotypes for near vision and seven types of central optotypes for near vision are arranged in a circular shape. Figure 4 is an enlarged plan view of one of the optotypes in Figure 3. It is.

In the figure, E is the subject's eye, E' is the examiner's eye, ■ is the optical axis of the observation system,
1 is a beam splitter, 2 is a fixation lamp that allows the subject's eye E to see far, 3 is a condenser lens, 4 is a mirror that diverts the optical path to the beam splitter 1, 5 is a relay lens, and 6 and 7 are A mirror 8 rotates around a vertical axis to selectively direct the light from the left and right eyes EL and ER to the examiner's eye E', which receives the light from the left and right eyes EL and ER that has passed through the beam splitter 1 and changes the optical path. Mirror to send to, 9
10 is a parallel plane plate that rotates around the horizontal axis and vertically moves the optical axis of the observation system, and 10 is a beam splitter that transmits light from the subject and reflects light from the unshaped spectacle lens holding device. , 11 is an objective lens, 12 is a Porro prism for erecting normal images, 13 is an optotype disk, 14 is an eyepiece lens, 15 is an unshaped spectacle lens holding device, 16 is a holder for a peripheral processing machine, 1
7 is an unshaped lens, and 17' is an upper mold for a peripheral processing machine.

The subject observation optical system includes the subject's eye E, a beam splitter 1, a mirror 6.7, a left/right switching mirror 8, a parallel plane plate 9, a beam splitter 10, an objective lens 11. It is composed of a Porro prism 12, an optotype disk 13, an eyepiece 14, and an examiner's eye E'.

In addition, the unshaped eyeglass lens observation optical system includes an unshaped lens 1
7 or an upper mold 17' for a peripheral processing machine, a beam splitter 10, an objective lens 11. It is composed of a Porro prism 12, an optotype disk 13, an eyepiece 14, and an examiner's eye E'.

The use of the eyeglass adjustment device configured as described above will be explained.

A test subject who wishes to wear glasses is placed in the eyeglass frame at the position of the test subject's eye E of the spectacle adjustment device shown in FIGS. 1 and 2. Fixed to.

When the right subject's eye ER performs distance viewing, the mirror 4, relay lens 5, and mirror 7 are moved together in the horizontal direction, and the mirror 4, relay lens 5, and mirror 7 are moved together in the vertical direction so that the line of sight of the pupil matches the optical axis I of the observation system. Now move the subject support frame.

When this adjustment is completed, the light from the fixation lamp 2 is reflected by the condenser lens 3, mirror 4, relay lens 5, and beam splitter 1, and reaches the pupil of the subject's eye ER.

Further, light from the pupil of the subject's eye ER passes through the beam splitter 1, is reflected by the mirror 7.8, passes through the parallel plane plate 9, the beam splitter 10, the objective lens 11, and passes through the Porro prism 12.
The image is then erected, a pupil image is formed on the optotype disc 13, and the image passes through the eyepiece 14 to reach the examiner's eye E'.

On the optotype disk 13, eight types of optotypes as shown in FIG. 3 are arranged radially as shown in FIG.

For example, the optotype shown in FIG.
1 Central visual target for left and right near vision OL, OR, lens radius scale R
1 and an astigmatism direction angle scale are drawn on a transparent or translucent sheet and can be used for both left and right eyes.

It is stated in Utility Model Application Publication No. 12509 of 1971 that it can be applied to almost everyone by making seven types of optotypes as shown in Figure 4 by adjusting near vision glasses, so please refer to the detailed information. The detailed explanation will be omitted.

The working distance of a person who desires to wear glasses varies depending on the job, and the line of sight also differs between a distance vision state and a near vision state.

Therefore, the correction position when adjusting the near vision glasses, that is, the central optotype OL for near vision, is determined based on the interpupillary distance and working distance of the subject.

An OR is determined.

Therefore, at the line of sight passing position from the center of the subject's pupil,
It is necessary to align the off-center of the spectacle lens, and the optimum optotype is selected from the interpupillary distance and working distance by rotating the optotype disk 13.

The pupil image of the subject's eye ER is adjusted so that it matches the optimal optotype, the central optotype for right near vision OR.

Next, the examiner sets the upper mold 17' for the peripheral processing machine, which is the same type of lens as the lens to be inserted into the eyeglass frame worn by the subject, in a predetermined position on the unshaped eyeglass lens holding device 15, and then While observing through the lens 14, the holding device 15 is moved to match the upper image and the image of the spectacle frame worn by the subject.

The peripheral edge processing machine holder 16 of this holding device 15 is rotated so as to always be at a fixed position when holding the unshaped lens 17.

This position is the geometric center position of the upper mold 17' when the upper mold 17' is set on the holding device 15.

At this time, the required size of the unshaped lens 17 is read by the lens radius scale R.

Next, the upper mold 17' is removed, and an unshaped spectacle lens 17, which has markings indicating the optical axis position and astigmatic axis direction and which can be removed from the material, is placed there.

The mark image indicating the optical axis position of the unshaped spectacle lens 17 is matched with the central optotype OR for right near vision of the optimal optotype, and the mark point indicating the astigmatism axis direction is aligned with the astigmatism angle scale.

Therefore, by these operations, the pupil of the eye to be examined for near vision can be made to coincide with the optical axis of the unshaped spectacle lens.

In this state, attach the peripheral edge processing machine holder 16 to the unshaped lens 1.
7, for example, by suction means, and the upper mold 1
By passing the lens along with 7' to a peripheral processing machine (not shown), a correct lens that can be inserted into an eyeglass frame is obtained.

Above, we have described the right subject's eye ER, but the left subject's eye E
L can also be prepared in exactly the same manner.

Furthermore, in the case of distance vision glasses adjustment, it is easy to understand that the necessary spectacle lenses can be obtained by aligning the pupil image with the distance vision central optotype O.

As is clear from the above description, according to the present invention, an optotype consisting of a central optotype for distance vision and a central optotype for left and right near vision, and an optotype disk in which the optotypes are arranged radially. By using this method, it is possible to adjust distance and near spectacle lenses, and the number of optotypes can be reduced, making it possible to provide an easy-to-operate, highly accurate, and more efficient spectacle adjustment device. .

[Brief explanation of drawings]

1 and 2 are a plan view and a side view respectively showing the optical system of the eyeglass adjustment device according to the present invention, FIG. 3 is a plan view of an optotype disk, and FIG. 4 is an optotype in FIG. 3. FIG.

Claims (2)

[Scope of utility model registration request] (1) A test subject observation optical system consisting of an objective lens and an eyepiece, and a light beam splitter installed on the optical axis of the test subject observation optical system to the clay mold for the peripheral processing machine and the unshaped spectacle lens. Eyeglasses comprising: an unshaped eyeglass lens observation optical system that forms an image of the applied mark on the objective lens imaging surface; and an unshaped eyeglass lens holding device that holds the unshaped eyeglass lens in a holder for an edge processing machine. What is claimed is: 1. A device for adjusting eyeglasses, characterized in that an optotype consisting of a central optotype for near vision and a central optotype for left and right near vision is placed on the imaging plane of the objective lens. (2) A number of types of optotypes, consisting of a central optotype for near vision and a central optotype for left and right near vision, are prepared depending on the interpupillary distance and working distance, and these are arranged in a disk shape. A device for adjusting eyeglasses according to claim (1) of the utility model registration claim.