JPS63500964A - sunglasses lenses - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] TECHNICAL FIELD The present invention relates primarily to sunglass lenses, and particularly to lenses that normally occur when wearing sunglasses. removes potentially harmful UV rays without leaving the usual markings around the eyes. This lens relates to a lens that provides appropriate shielding. However, the present invention in its broadest aspect In addition, it would be recognized that it has currency for other things, In this specification, sunglass lenses and their manufacture, and other related items are described. A number of unique features are also disclosed.

With respect to the main aspects of this disclosure, ultraviolet rays such as benzophenone coatings Sunglass lenses with a shielding agent protect you from the possible harmful effects of UV radiation. It is known to protect the wearer's eyes. However, such screening agents Not only does it limit the exposure of external radiation to sensitive areas of the eye, but it also protects the sensitive parts of the eye. Also limit exposure to other parts of the body. In particular, sunglass lenses are different from normal eyes. The large size of the eye protects the skin around the eye. As a result, The skin in the contact area receives less UV radiation than the rest of the face.

When I take off my sunglasses, sometimes even when I'm wearing them, my face looks sunburned. The skin around the eyes appears white compared to the skin around the eyes. This looks bad.

Place the UV-blocking agent only in the central area of the lens, for example, in the area corresponding to the pupil of the eye. It was found that a sufficient protective effect for protecting the eyes can be obtained by . Of course, the skin around the eyes should be sufficiently tanned, and the radial direction of this central area should be The shielding agent can be placed at a relatively low concentration in the surrounding area to provide protection to the outer area. is desirable. In this way, in one embodiment, the light-transmitting ultraviolet screening agent In a lens for protecting the eye from harmful radiation, the central area of the lens is the concentration of the shielding agent in is higher than the concentration in the peripheral region surrounding this central region. A lens characterized by the following is disclosed.

Outside the central region, little or no screening agent may be present, or is insufficient to provide complete protection to the eyes and prevents the skin from tanning properly. The shielding agent may be applied at a sufficiently low concentration without causing any damage. In the latter case, its concentration may increase radially inwardly toward the central region. within the central area Also, the concentration may vary, for example with a maximum at the center. central territory The boundary between a region and its surrounding region can be discontinuous with abrupt changes in concentration. Alternatively, it may change gradually. In the latter case, the change in concentration The density is generally constant from the periphery to the center so that there are no sharp boundaries in the area. Increase the concentration with a degree gradient. In that case, the amount of screening agent exceeds the threshold value. It is necessary to consider all boundaries, that is, there is a threshold at which the shielding effect occurs. . The dimensions of the central area can vary, for example, from a diameter of 5III11 to 30 or 40 mm. on average 10 or 15 II for normal purposes. It is I11. This large dimension can protect the sensitive eyelids.

The shape of the central area can be circular, oval, polygonal, or Other shapes can be used that produce the desired effect of protecting the eye while allowing the eye to be protected. Re It may also be in the form of a narrow strip across the lenses. This area does not necessarily depend on the geometry of the lens. Alternatively, it may not coincide with the optical center.

Screening agents are often substantially colorless and are applied uniformly across the lens or from the top down, for example. other substances to create a gradient color across the area, or by tricking polarized light or light. Other substances may be used to impart a color change or the like. lens as desired Although it may be more optically corrective, the term lens refers to some kind of covering over the eye. It should be recognized that it means covering the

Due to the broad aspects clearly outlined above, the ability to substantially screen ultraviolet light UV-screening agent and ordinary coloring agent or it that mainly limits wavelengths in visible region. Distinguished from those close to . Suitable UV screening agents include stable and effective absorbers. It is an astringent and widely used (preferably a colorless one to avoid interference with colorants). It is better. In particular, it is desirable that the extinction coefficient drops sharply at the edges of the visible region. These requirements are met in many applications using 0-hydroxyphenyl ketones. Of these, 0-hydroxybenzophenone is particularly useful. 2- (2 -hydroxyphenyl)-benzotriazole also shows good properties as a screening agent. have. As a special drug, 2,2"-dihydroxy-4,4"-dimethoxy Sea-benzophenone (Ubinol) or 2-(2-hydroxy-4-methyl-fluoride) (tinuvin P).

Generally, the screening agents are applied by coating the lens with a solution of the screening agent dye, such as by spraying or dipping. applied by

In this coating process, the central region is an adhesive layer placed over the lens. Or clearly demarcated by an opening in a cover such as adhesive tape, film, etc. be done. This results in a well-defined central region. If the coating melts As the liquid seeps into the lens, the clarity of the border decreases, but this may be may be desirable.

Particularly when using immersion, it is necessary to place a covering on both sides of the lens. child An aperture is formed in only one of the covers, or in both. cover both If the apertures are formed in a straight line, arrange the apertures in a straight line and make the aperture dimensions the same. Alternatively, the dimensions may be different. In the latter case, the length of the soaking time, the lens With a change in the concentration of the shielding agent depending on the thickness of the Change is brought about.

A more gradual change can be achieved using a novel immersion technique, in which the lens is uniformly coated with a shielding agent. and then reduce the amount of masking agent removed radially inward. This can be achieved by solution treatment in the following manner. This is the lens Rotate and immerse into the solution, and the outer areas will remain in the solution for a longer period than the center area. This is achieved by gradually raising the lens so that it is held in place. suitable Adjustments are made to the initial immersion depth, rotation speed, withdrawal speed, etc.

Lenses are usually used in pairs in frames to form sunglasses be done. However, lenses are commonly used in eyeglasses, ski goggles, face mask Also used for glasses, driving goggles, safety glasses, etc.

The present invention, which is intended to be protected, is applicable not only to lenses and sunglasses, etc. , extending to their manufacture by any of the processes outlined above.

Some of the concepts mentioned above are relevant to other fields with more general applicability. It will be clear that protection is similarly sought in these embodiments.

For example, coating methods for the purpose of surface treatment of objects, especially lenses, Please keep this in mind.

As mentioned above, sunglasses lenses, whether it depends on polarization or other factors Regardless of whether it is true or not, it is well known that it can be colored. or, It is also well known that optically corrected ophthalmic lenses can be colored. many In some cases, coloring is done for the purpose of reducing glare, for example, but for purely decorative purposes. Coloring is becoming increasingly common.

In fact, you can even get tinted glasses that have no optical function at all.

It is known to impart graded color intensities to tinted lenses. For example, with the Lord to reduce glare from the sun above the wearer. It is also possible to have a darker color at the top than at the bottom. skier on snow For use, both top and bottom to reduce glare from both sun and snow The lens is dark, but the central part is brightened to improve visibility straight ahead. is known. In general, there is a gradual change from dark to bright areas. It is desirable that

The current common method of tinting lenses is to dip them in dye and then pull them up. This is a method to increase The bottom area will remain in the dye the longest and will be the darkest part. . Other areas become progressively lighter in color the shorter the time they remain in the dye. This process is Repeat as necessary to obtain lenses with darker upper and lower parts. The lens can be flipped over before being immersed in the dye.

Although such a process has limitations in terms of the coloring effect that can be obtained, it is It has the advantage of being simple to implement according to requests.

A new type of coating that changes coating properties from all directions toward the center of the lens. A new type of lens is being introduced. Such lenses are new and e.g. Darken the entire periphery and brighten the center, or darken the center and lighten the surroundings. You can also make it easier. This coating can, for example, This is done for specific optical purposes, such as shielding, but not just glare. to provide shade and/or to create a decorative effect; It may be.

The shielding is uniform at any position in the radial direction from the center of the lens, and its radius It can be gradually changed as the distance in the direction changes.

This type of lens has excellent optical effects, especially when the peripheral area is dark. shows. The wearer is protected from unwanted glare from all directions, but Even so, visibility straight ahead remains good. This has the ability to block ultraviolet rays. Particularly useful in combination with the central region.

This kind of lens is not feasible due to the many steps that have to be carried out beforehand. However, new processes have now been developed to treat the surfaces of objects such as lenses. In the process, the object is placed approximately perpendicular to the surface of the processing liquid. Performs reversible relative movement, and the area of the object in contact with the processing liquid at any point in time also increases or decreases, and also increases or decreases the process of such movements. In both cases, the object extends transversely to the direction of movement and penetrates the object. It is made to rotate around an axis 64.

In this way, if the rotating shaft is separated from the processing liquid, it will not come into contact with the processing liquid and will There are surface areas where the distance is short.

However, the rotation of the object is not equal to the distance from the surface of the processing liquid to the axis of rotation. or a greater distance from the axis of rotation. etc. will be processed accordingly. If this distance gradually increases, the object gradually It will no longer come into contact with the processing liquid. During the treatment that the surface has undergone as a result of such treatment The spacing will gradually decrease from all radial directions towards the axis of rotation.

If the treatment liquid is a dye and the length of treatment changes the intensity of the color, the effect will be more It will be brought to the dense periphery. In such cases, the object is preferably The axis of rotation passes through the center of the lens. If this process is the center of the lens If the area is not in contact with the processing liquid, this area will be completely transparent.

-i, objects such as lenses must be treated first for the process to be effective. It is only necessary to touch the liquid to half the depth, and if there is more than that, the transparent center area will be removed. is less likely to occur.

In some cases, for example to protect the eyes, it is necessary to lighten the periphery and darken the center. It is desirable to do so. This involves first uniformly coloring the object by appropriate means, Then treat it as described above, e.g. with a solution that removes the dye. This can be achieved by The periphery is processed for a longer time and therefore has a lighter color. Ru.

As mentioned earlier, if the first coating is a UV-screening coating, Similar treatment procedures are available for similar treatment procedures, whether in the form of colored dyes or not. This is particularly important for First a normal uniform coating, then , by performing the above processing, the center of the lens receives higher ultraviolet rays than the periphery. A line shielding effect is provided. This protects the eye from the possible harmful effects of ultraviolet radiation. Protect sensitive areas. On the other hand, good peripheral vision is maintained. Such an outline Nen is suitable for various processing solutions and for various objects, regardless of whether or not a coloring effect can be obtained. It can be used for things.

For example, to place a dark color at the top of the lens while maintaining the overall effect, Intermittent rotation may be used, but rotation must be gradual and continuous. It is essential. Similarly, even though intermittent movements may be used, relative movements needs to be gradual and continuous.

Relative motion can be achieved by moving the object itself, or by keeping the object stationary and moving the processing liquid. by raising and lowering the container, or by pumping process liquid into and out of the container. This can be achieved by supplying and changing the liquid level of the processing liquid. this movement may be executed or controlled automatically or manually. Similarly, rotation can also be done automatically or It is performed or controlled manually and typically involves the use of an electric motor.

Particularly preferred forms of the disclosed apparatus broadly refer to a carrier used to support the surface to be means for rotating the carrier about a generally horizontal axis passing through the object; and means for effecting relative vertical movement between the surface of the processing liquid in the tank and It includes.

When the object is a lens, if they are used together, the pair is processed at the same time. It is preferable to do so. In this way, the carrier aligns the two lenses. Alternatively, two carriers may be provided.

As an example of some of the broad principles outlined above, the concave surface attached below Some of the equipment will be described with reference to: Figure 1 is a conceptual elevational view of the preferred equipment; , Figure 2 is a front view of the lens manufactured using this device, and Figure 3 is the inside of the lens. How the lens is prepared for the UV screening agent applied to the heart area The fourth figure is a sectional view of FIG. 3.

As shown in Fig. 1, the device consists of a frame 1 and a tank 2 containing a coloring dye 3. . A support member 4 is slidably attached to the frame l by a guide 5. This allows the support member 4 to move upwards or downwards. This operation is performed on rack 8 An electric motor 6 that drives a pinion 7 that meshes with the electric motor 6 and is controlled by a changeover switch 9. carried out by. A second electric motor 10 is attached to the support member 4. The motor lO drives a vertical shaft 11 connected to a gearbox 12, 11 drives two horizontal shafts 13 disposed within bearings 14. each shaft 1 The end of 3 is formed with a carrier 15 into which the lens to be processed is mounted. It is. In this way, when the switch 17 is operated, the carrier 15 and the lens 16 are rotates around a horizontal axis. At this time, the support member is moved by operating switch 9. gradually move upward.

FIG. 2 shows typical surface effects produced on lens 16. dark like this A surrounding area 18, bright areas 19 and 20, and a relatively transparent central area 21 are shown. be.

With respect to Figures 3 and 4, tinted lenses have a cover sheet on both sides. ports 22 and 23 are arranged, respectively. These have openings 24 and 25 in their centers. The opening 24 is slightly smaller than the opening 25. representative The dimensions are 12 and 15 mm in diameter, respectively. The sheet is a suitable adhesive plastic. Examples include materials used to protect lenses during polishing.

The lens is then dipped into a solution of a suitable UV-screening agent such as benzophenone. be done. The shielding agent penetrates into the lens and once the central area is properly coated. Once removed, the lens is cleaned and the protective sheet is removed.

The result is a decorative, peripheral, eye-relaxing coloration that provides good forward vision and protects the eyes. Has a central unpigmented area with a UV screening agent within this central area that protects from damage A thin glass lens can be obtained. For different sized openings in protective membranes used in manufacturing There is a more clearly demarcated concentration gradient at the edges of the central region.

Decorative colored dyes have no substantial UV-screening ability and/or are poorly colored. If it is not dark, tanning can occur through the surrounding area.

Another desirable embodiment having the UV screening agent only in the central region is that the entire region is colored. or, for example, only the upper or lower part is colored, or contains no coloration at all. I'm here. In such cases, rotating the coating equipment is not required. stomach.

Variations exist to this particular embodiment and to the broader aspects disclosed herein. It is clear that Furthermore, - in the configuration, e.g. Whereas we mentioned rotating around the axis through which it passes, this axis is completely geometric. It is recognized that there is no need to be at the target or optical center.

Eccentric rotation produces the desired effect and in any case the target to be processed Standard lenses may be cut according to user requirements after processing. stomach.

Submission of translation of written amendment (Article 184-7, Paragraph 1 of the Patent Act) May 13, 1986

Claims (10)

[Claims] 1. The lenses are coated with UV-screening agents to protect your eyes from harmful rays. Therefore, the concentration of the shielding agent in the central region (21) of the lens is The concentration of the lens is higher than that in the surrounding area (18, 19, 20). Z (16). 2. A claim characterized in that the shielding agent is disposed only in the central region (21). The lens described in item 1 of the desired scope. 3. characterized in that there is a concentration gradient of the screening agent at the edge of the central region (21); A lens (16) according to claim 2, characterized in that it is characterized by: 4. the screening agent is in the form of a coating of benzophenone UV screening agent; A lens according to any one of claims 1 to 3, characterized in that: 5. Furthermore, a claim characterized in that the lens (16) is colored. The lens according to any one of the ranges 1 to 4. 6. Claim 5, wherein the coloring has a concentration gradient in the radial direction. Lenses listed. 7. The width of the central region (21) in which the shielding agent is arranged is in the range of 5 to 40 mm. A lens according to any one of claims 1 to 6, characterized in that: 8. The width of the central region (21) where the shielding agent is arranged is in the range of 10 to 15 mm. 8. A lens according to claim 7, characterized in that: 9. Claims 1 or 2, characterized in that the central region (21) is approximately circular. to the lens according to any one of item 8. 10. A set of lenses incorporating the lenses according to any one of claims 1 to 9. sunglasses or glasses.