JPH0125936Y2 - - Google Patents

Description

[Detailed description of the invention] <<Industrial Application Field>> This invention relates to sunglasses that can compensate for visual acuity to some extent.

<<Conventional Technology>> There are several types of glasses (sunglasses) used to protect the eyes from glare. for example,
Some use colored balls, others change color depending on the surrounding brightness, and some use polarizing plates, where two polarizing plates are stacked one on top of the other, and one polarizing plate is rotated to adjust the brightness. There are some that allow you to adjust the

<<Problems to be solved by the invention>> By the way, sunglasses are difficult for people with poor eyesight to use. In other words, custom-made prescription glasses are expensive, and it is a pain to have to replace them with regular glasses each time.

The purpose of this invention is to provide sunglasses that can compensate for amblyopia to some extent.

≪Means for solving the problem≫ In the glasses of this invention, each of the left and right tabs, which are fitted into the temples, consists of two polarizing plates, front and back.
At least one of the polarizing plates is rotatably supported by a temple, and at least one of the polarizing plates has a small hole.

<<Operation>> If one of the polarizing plates is rotated to align the polarization axes of the two polarizing plates, the most light will pass through the lens, making it appear brighter. If the polarization axis is gradually shifted from this state, the amount of light passing through is restricted and the field of view gradually becomes darker. Therefore, the user can adjust the polarization axis according to the surrounding brightness and protect his eyes from glare.

If the polarization axes are orthogonal, almost no light will pass through the pores, and only the light that has passed through the pores will enter the eye. As a result, it becomes possible to see objects clearly due to the pinhole effect.

≪Example≫ An example of this invention will be explained based on the drawings.As shown in Fig. 1, these glasses consist of a temple (frame) 1 and left and right lenses (lenses) 2. Each of them is composed of two polarizing plates 3 and 4, front and rear, as shown in FIG.
Of these, the front polarizing plate 3 is fixed to the temple 1 so as not to rotate, and its polarization axis is oriented, for example, in the horizontal direction, so that only horizontally polarized light passes through. The rear polarizing plate 4 is rotatably fitted into the temple 1 so that the direction of its polarization axis can be changed. Code 5 is polarizing plate 4
This is a claw attached to it to make it easier to turn.

As shown in FIG. 3, the rear polarizing plate 4 can be rotated from a state in which the claw 5 is in the A position to a state in which it is in the B position. When the claw 5 is in the A position, the polarizing axis of the polarizing plate 4 is parallel to the polarizing axis of the front polarizing plate 3, and the amount of light passing through the tab 2 is the largest. When the claw 5 is in position B, the polarization axis of the polarizing plate 4 is vertical and perpendicular to the polarization axis of the front polarizing plate 3, so that the amount of light passing through the tab 2 is minimized.

Therefore, when the surroundings are dark, turn the claw 5 to position A to make it look brighter. When the surroundings are bright, turn the claw 5 from A to B as appropriate to narrow down the light passing through the tama 2 and prevent it from being dazzling.

These glasses are specially designed to help you see things that are far away or small. That is, the front polarizing plate 3 is provided with a hole 6 having a diameter of, for example, about 1 mm. This small hole 6 may actually be made in the polarizing plate, but it is necessary to make sure that the light passing through it is not polarized.
Only that part may be made transparent or semitransparent. Although the number of small holes 6 is two in the embodiment, it may be one or more.

When the claw 5 is in the B position, as described above, the 2
Since the polarization axes of the polarizing plates 3 and 4 are perpendicular to each other, almost no light passes through the polarizing plates 2. However, since the light passing through the small hole 6 is not polarized, it enters the eye through the polarizing plate 4 on the rear side. As a result, people who wear glasses see through a tiny part of the lens of their eyes, allowing them to see clearly (pinhole effect). This is the same logic as the smaller the aperture of the camera, the greater the depth of field. However, when looking through a small hole, it is inevitable that the field of view will be narrow and dark. Therefore, for example, a person with presbyopia
It is convenient to use them as sunglasses while playing golf, and when keeping score, put your nails in position B and look through the small holes.

When the claw 5 is in a position other than position B, light passes through the eyelet 2, so the presence of the small hole 6 is hardly noticeable to the eyeglass user. Also, other people do not notice that the hole is open.

In the above embodiment, the small holes 6 were provided in the front polarizing plate 3, but they may be provided in the rear polarizing plate 4, or in both polarizing plates. When making small holes in both polarizing plates, make the holes so that when the claw 5 is brought to position B so that the polarization axes of the front and rear polarizing plates 3 and 4 are perpendicular to each other, the small holes in the front and rear polarizing plates overlap. This way, the light passing through the small holes will not be attenuated, so things will appear brighter than if there were small holes in one of the polarizing plates.

≪Effects≫ These glasses not only allow you to freely change the brightness by rotating one polarizing plate, but if the polarizing axes are orthogonal, the field of vision and brightness will be limited, but the pinhole effect will allow you to see through the small hole. I can see things clearly. What's more, when used as sunglasses, light passes through the entire frame, making the holes less noticeable and looking great.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention; FIG. 1 is a perspective view of the glasses, FIG. 2 is a sectional view of the eyeglasses, and FIG. 3 is a front view of the eyeglasses. 1... Vine, 2... Tama, 3... Front polarizing plate,
4... Rear polarizing plate, 5... Claw, 6... Small hole.

Claims (1)

[Scope of utility model registration request] Each of the right and left balls fitted into the temple is made up of two front and back polarizing plates, at least one of the polarizing plates is rotatably supported by the temple, and at least one of the polarizing plates has a small hole. Glasses that have