JPS6391623A - New glasses combination lens composed of two portions for making multifocus synthetic lens without grinding - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a laminated multifocal lens, and more particularly to a monolithic minus cylindrical lens of positive or negative refractive power used as one component to make a multifocal composite lens without polishing. The present invention relates to a new ll11 mirror-coupled lens consisting of two parts.

Correctly fixing bifocal lenses is one of the most difficult and expensive problems for those skilled in the art.

For each composite bifocal lens, various conflicting conditions must be matched and mutually satisfied.The cost of a bifocal lens is determined by the permutations and combinations of synthetic bifocal prescriptions, as each lens has conflicting conditions. They are expensive because there are a large number of them, there are cosmetic requirements, and they have to be polished to fit the order. Therefore, it is impossible to standardize prescriptions for synthetic bifocal lenses, which would require keeping thousands of lenses in stock.

Laminated lenses, both monofocal and multifocal, are known in the prior art, but suffer from a number of drawbacks. It is known that a positive cylindrical lens is generally used for a laminated lens because there is no system that uses a negative cylindrical lens for a positive laminated lens.

However, using a plus cylinder presents a disadvantage because the prescription uses a minus cylinder, and as a result a conversion is required for the prescription to be satisfied.

Prior art laminated lenses, particularly bifocal lenses, typically used one of the lenses simply to position the bifocal segment, or alternatively as a carrier for bifocal segment Y. This increases the thickness and weight of the bifocal lens, which is undesirable in terms of appearance.

The object of the present invention is to provide a new spectacle combination lens consisting of two parts for making a multifocal composite lens without polishing, which overcomes the deficiencies of the prior art mentioned above.

The invention particularly relates to a manufacturing method in which two factory finished components are joined together to obtain a composite bifocal finish or multifocal lens assembly of a desired focal length, one of the components being a minus cylinder. . Laminated lenses can be produced with either positive or negative refractive power, with a negative cylinder, by the correct selection of the other components. Generally, the minus cylindrical lens section itself is a composite lens or a spherical cylindrical lens, and has, for example, spherical refractive power in addition to cylindrical refractive power.

FIG. 1 shows a laminated negative synthetic bifocal lens 10 of the present invention. The laminated negative lens 10 has an inner concave surface 1
2 and an outer convex surface 14. The lens 10 is formed by laminating a single minus cylindrical part 16 on a spherical bifocal part 18 via an optical system adhesive 20.

Bifocal section 18 includes a factory-finished minus spherical focus lens having a bifocal addition 22 associated therewith. The minus spherical finish bifocal section 18 with bifocal addition n22 can be made in the factory in a conventional manner known in the art. The spherical bifocal portion 18 has an outer convex surface 14 and an inner concave surface 24.
The bifocal adder 22 is embedded in the convex surface 14.

Uniform portion 16 has a negative or concave cylindrical surface 12 and a convex spherical surface 26 that is complementary to the concave surface of spherical bifocal portion 18 . The unitary minus cylinder 16 is typically a composite lens, but can be dedicated to astigmatism correction if desired. This unitary portion 16 is also finished at the factory. Generally, the inner lens portion 16 is a monomer composite lens having a negative cylinder on its inner surface 12 and having a fixed cylinder axis and having a positive or negative refractive power.

FIG. 2 shows an embodiment of the present invention that includes a monomer portion 16 having an inner negative cylindrical surface 12 and an outer convex spherical surface 26, just like the monomer portion used in the laminated lens 10 of FIG. A laminated finish plus synthetic bifocal lens 30 is shown. The laminated plus synthetic bifocal lens 30 has four inner surfaces 44 and an outer convex surface 3.
There is an outer plus spherical finished bifocal lens portion 38 having a diameter of 4.

The outer surface 34 of the positive spherical finished bifocal section 38 has a bifocal reading segment 42 . As in the case of the laminated minus lens 10 shown in FIG.

! FIG. R3 is another embodiment of a laminated plus composite bifocal lens 30' having an essentially sparse structure as the lens 30 of FIG. However, the bifocal readout portion 42' of the lens 30' includes an extension from the standard curvature of the convex surface 34'; in this embodiment, the refractive index of the bifocal readout portion 42' of the lens is the bifocal finish. It is the same as the other parts of 38. The π-shaped reading section 42' of the bifocal lens is
This is particularly effective when the lens 38 is made of plastic.

It goes without saying that the bulging bifocal segment can also be used for minus lenses.

One important aspect of the invention uses two factory finished components. Factory-finished components do not need to be polished in a polishing shop; they can simply be selected and laminated according to a predetermined recipe. The components are therefore finished in a mass-produced manner at the factory, which excludes flat polishing (as is normally done in polishing shops). The segmented lens components can be made of glass, plastic, or any other material that is transparent to light and can be bonded.

Generally, in forming an optical lens, many conditions must be satisfied in addition to forming an image at a predetermined position. The lens can be polished in an almost infinite number of different ways, provided that the only requirement is to image in place.

Since a lens has two surfaces, regardless of the curvature of one surface, the other surface can be polished to have a predetermined refractive power that is the sum of the curvatures of both surfaces. , consists of two lens components with two surfaces each, so there are four surfaces in total. Two of these four faces must be complementary. The radius of curvature of this complementary surface is approximately 6 diopters, preferably 5.
It is 75 to 6.50 diopters. This complementary surface is referred to as the standard curvature for lamination in this book.
ture forlamination). In any case, set a prescription in which the remaining two surfaces are "best 7 ohms" in a laminated or assembled lens.

The lens assembly of the present invention is particularly advantageous because it has a bifocal segment on the outer or convex surface and a cylindrical surface on the inner or concave surface. This has optical and cosmetic advantages: the laminated lens can be thin and has two laminated surfaces (eg 26 in FIG. 1).
24) has a standard curvature for lamination and the surface is cylindrical or includes bifocal segments, so it can be formed without introducing complicated conditions.

The outer spherical lens portion 18 or 38 may have a bifocal or multifocal segment associated with the outer convex surface 14 or 34, respectively. Bifocal segment 22 shown
Although and 42 are fused, the segments can be of any desired design or form, and cutting segments may be provided. Read segment is 42'
Like or fused, molded, laminated or vacuum shaped in or on its segments! The substrate 18 or 38 to be used can have an unusual refractive index, such as 42 and 22.

Lens portions 16 with varying curvature surfaces 12 and 34, all with the same curvature or surfaces 26, 24 and 44
．． 18 and 38 may be stocked in an optical polishing shop; once a prescription is provided, one skilled in the art can select the appropriate lens portion and apply any number of optical adhesives known in the art to the mating surfaces. do. This application is accomplished by applying a thin coat to one or both lens portions by spraying or other suitable method. The selected inner negative cylindrical lens portion 16 is coaxially aligned with the patient's field of view as stated in the prescription, and the two lens components are bonded to provide the desired 7 ohm negative cylindrical laminated synthetic bifocal or multifocal lens. be done.

The minus cylinder is one characteristic advantage and is used in the present invention to contribute to the "best 7 ohms" because the prescription is written in a minus cylinder.

In the laminated lenses used so far, prescriptions written with a minus cylinder had to be converted to a plus cylinder. In the present invention, the patient is able to see through the lens in the same way that he or she would be seen during an examination.

In general, the invention is only 100! ! ! type outer lens part 1
It can be implemented with 8 or 38 stocks, thus having 10 types of outer curvature (14, 34), each with 10 different bifocal additions 22° 42 or 42'
There is one of these. The inner lens part of only 480 types, which is a preferable stock, is +20 (1 sphere) -3 (1 circle) --
8(l[)-3(trB)yt is required using the "best form" to encompass the entire range of pigs. 1
Using 0,000 types of side lens parts and 480 types of inner lens parts, different 13°44,081 types of "best 7 ohm" prescriptions are possible before taking into account 36 types of axial rotation.

In other inventory systems, the present invention can be implemented with only 99 mg outer lens portion 18 or 38, so there are 10 different outer curves (14°34), some of which have 11 different complexities. Focus addition section 22.4
2 or 42'; one has only 6 additions. In this stock, only 481
type of inner lens portion 16 is required to cover the entire range of +15 to -20 diopters using "best 7 ohms". With 99 types of outer lens parts and 481 types of inner lens parts, a total of 48,000 combinations are possible before taking into account the 36 types of axial rotation. Even if 36 types of axis rotations are taken into account, 580
With a lens section of 11 g, approximately 1°728.000 combinations are possible, but many of these combinations are optically identical.

Theoretically, the number of inner lens parts 16 can be reduced to 104N. Even in that case, it is possible to obtain 80 levels of spherical refractive power, which is equal to the product of the 10 levels of spherical refractive power of the outer lens and the 8 levels of spherical refractive power of the inner lens. It is also possible to perform 13 steps of cylindrical correction in the inner lens portion. In such a reduction method, the number of outer lens parts is looms and is equal to the product of 10 levels of myopic correction and 10 levels of hyperopic refractive power. The 1104Jffi inner lens is equal to 8 steps of myopic power multiplied by 13 steps of astigmatism correction. Theoretically, the assembly of one outer lens part and one inner lens part of this small number of components provides 80 steps of distance vision power, 13 steps of cylindrical correction, or 10 steps of reading power. be able to.

Theoretically, the number of combinations that can be generated is the value obtained by multiplying the number of outer lenses by the number of inner lenses, assuming that circle a correction is always performed with one pongee, that is, 100 x 104 = 10,40
Equal to 0. If the cylindrical shaft is rotated in 36 steps, the theoretically possible number of combinations is 10,400 x 3.
6, or 374.400.

By practicing with a relatively small number of standard lenses in accordance with the teachings of the present invention, one skilled in the art can create numerous lens prescriptions by selecting the desired spherical bifocals and the desired monochromatic #J corrective lenses. be able to. The correct prescription can be created simply by aligning the single cylindrical lens with the patient's visual axis. Colored lenses can be made by uniformly coloring the lens lamination adhesive.

Another advantage of the invention is that plastic lenses can be used. Bifocal plastic lenses have heretofore not been used due to the inability of those skilled in the art to mount plastic bifocal segments and to make laminated lenses.

Plastic lenses have the advantage that they can be tinted either before or after lamination.

By "optical adhesive" is meant any adhesive that is transparent to light, has the desired adhesive properties, and is capable of maintaining the lens parts in a laminated state. Although a number of optical lamination materials have been used in the prior art, one that is particularly suitable for the present invention is clear epoxy-based U. However, all conventional optical lamination adhesives may be used in the present invention. Yes, it is possible to make extremely strong lenses using epoxy-based U (fat).

The present invention is not limited to bifocals, but can also be applied to professional multifocals. In some cases, it may be desirable to stack three or more lens components.
According to the present invention, it can be carried out suitably.

According to the present invention, typically only two series of components are required, with one off-the-shelf bifocal lens, each having a different optical power, and one stock bifocal lens, each having a different optical power, and all radii of curvature of the laminated surfaces. The "best 7 ohms" over the entire range can be obtained with one stock monocylindrical lens (preferably 5.75-6.50 diopters). Therefore, the number of lenses for creating a laminated composite bifocal lens can be significantly reduced using a minus cylinder for a given correction. The present invention also provides a greatly simplified component series capable of achieving a wide range of optical power from +15.00 to -20.00 diopters.

The system of stock factory-finished lens components has an optical power range of about +6.00 to about -12,00 diopters for regular lenses and about + for biconvex lenses.
Up to 15.00 diopters. Thus, according to the present invention, a wider range can be covered with fewer lens components than in conventional systems.

The examples set forth below are given as one implementation and are not intended to limit the methods and products of the invention.

Example I Prescription: +1.00 0,50X13S°A dd(A
ddi-tion) + 2, O0 t52 The lens as shown in Figure 52 has a positive spherical finished bifocal lens portion 38 having a positive convex surface 34 of +6.50 diopters and a negative four surface 44 of -6,25 diopters.
and a plus spherical lens portion 38 having a bifocal addition portion 42 of +2.00 diopters. The monocylindrical lens 16 with a minus cylinder is
Convexity 26 of +6.25 and +0.75-0.50
is selected to have a refractive power of . Mark the bifocal portion 38 as the desired segment position. The marking is done on the convex surface 34 and on the unisex part 16 at 135 degrees.
are marked, and the markings are located on all four sides 12. The concave surface 44 of the bifocal section 38 and the convex surface 26 of the monofocal section 16 are uniformly overcoated with epoxy resin, which is applied by spraying a thin layer and pressing both surfaces to dry. The original markings are available for etching.

Example II Prescription knee 3.00-0.50X135°Add+2.2
Following the procedure of Example I, +4. Convex surface 1 of OO diopter
It is stated that a spherical minus lens 18 having a concave surface 24 of 4 and -6,25 diopters is used to produce the lens shown in figure plS1, with a convex surface 14 of +2.25 diopters.
It has a diopter bifocal addition. The unitary part 16 with a minus cylinder has a convex surface 26 of -6,25 geoffri and a -7
, 00-0,50. Monosexual part tsumugi 1
Rotating it by 35 degrees will result in the prescribed prescription.

EXAMPLE III Following the procedure of Example I, a +2.
A positive spherical finish lens similar to the lens shown in FIG. 2 with an addition of 0.00 diopters has a -6.25 diopter convex surface 26 of the lens 30, -6.00 diopters x 1
It is laminated to a unitary part 16 with a minus cylinder having a concavity of −7,00 diopters at 80°, as well as a concavity of −7,00 diopters at 90°. The resulting prescription is O, S, (○culus
S 1nister) +0.50-1.00X180
°Add+2.00.

Example ■ Prescription: +3.00-0.75x45°Add+2.50
Following the procedure of Example I, a similar lens shown in FIG.
0 diopter convex surface 34 and -6,25 diopter concave surface 44
Prepare a plus spherical finish bifocal part 38 having +
6.25 diopter convex spherical surface 26 and -5 at 45 degrees,
It is produced by laminating the acetic part 16 with a negative cylinder having 00 diopters and four sides 12 of -5,75 diopters at 135 degrees.

Example V A lens similar to that of FIG. 2 is produced according to the procedure of Example I. Prescription is +5.00-0゜50X180
” Add+2.00.+2.+10,25 with the addition part 42 of the OO nojiota The convex surface 34 of the It pig
and a positive spherical finish bifocal part 38 having an inner concave surface 44 of -6.25 diopters, and a monofocal part 16 (using a negative cylinder having a convex surface of +6.25 diopters and a concave surface of -5.75 diopters). However, the monosexual part 16 is +i, oo-
o, 5oxt with a total refractive power of 80°),
As a result, a convex surface 14 of +2.00 diopters, a concave surface 24 of -6,25 diopters, and an additional portion 42 of +3.00 diopters.
becomes. The unitary part 16 using a minus cylinder is +6.2
5 diopter convex surface 26 and -9,25 diopter four surface 12
This unitary part 16 has -3゜00-1.0OX
It has a refractive power of 180''.

Example IX A laminated negative synthetic bifocal lens has a +2°OO diopter addition and a +6.25 diopter and -6 diopter, respectively.
, 25 diopters convex and concave, according to the procedure of Example I. This section is laminated to create a unitary section using a minus cylinder with a convex side of +6.25 diopters and a concave side of -8.25 diopters. The refractive power of its monomorphic part is −
It is 2,00 cylinders x 90 degrees. The resulting prescription is -2
,00 cylinder x 90'' +2,0OAdd.

Example
．． Formed according to the procedure of Example I by providing an outer spherical finished lens with a convexity of 00 and a concavity of -6,25, the diameter of the outer spherical lens component is only 38 mm. The outer lens part is laminated and +6
．． 25 convex surface, -4゜oox iaoo and -5,0
A monolithic finished lens part is made using a minus cylinder with a concave surface of OX90°, and the typical diameter of this inner lens is 58alI6.

Example V ■ Prescription is +2.50 + with additional part? ,50-0゜50
A lens having the overall configuration as shown in Figure @2 at X180° was prepared using a positive spherical surface having a front surface of +8° 25 diopters and a rear surface of -6° 257 diopters with a +2.50 addition. It is made by laminating a bifocal portion 38 and a monofocal portion 16 using a minus cylinder having a front surface 26 of +6.25 diopters and a rear surface 12 of -5.75 diopters, and the total refractive power of the monofocal portion is +0. .50-0,50X18
0'.

Example V ■ A lens of the same construction somewhat similar to the lens shown in FIG.
The minus spherical finish bifocal lens portion 18 having a convex surface 14 of +4.25 and a concave surface 24 of -6.25 is
By laminating with a unitary part 26 using a minus cylinder having a convex surface 26 of 5 and a convex surface 12 of -8,25,
Given a prescription of -2,00 -2,00 x 90° Acl, l + 2.00, the monomorphic section 16 produced according to the procedure of Example I has an optical power of -2,00 flat disc x 90°. have

Example V■ The laminated minus composite bifocal lens in Fig. 1 has a diameter of -7,25
-1,0OX180°Add+3.00 and is produced according to the method of Example 2. The minus spherical finished bifocal parts 1 and 8 have convex area layered biconvex lenses, and the prescription is +12.00-1.00x180°Add+
It is 3.00.

It will be readily understood by those skilled in the art that the present invention is not limited to the embodiments introduced in this document, and that various other embodiments are possible within the scope of the claims. .

The present invention can be implemented in the following manner.

Includes correction for hyperopia, myopia and astigmatism, +15 to -
Laminated finish multifocal composite 1liLI with thicknesses that can be performed either positive or negative within the range of 12 diopters! In a lens assembly, the assembly has a spherical outer lens part farther from the eye and an inner lens part closer to the eye, the outer lens part having refractive power and being a multifocal lens; having an outer surface further away from the eye and an inner surface closer to the eye, the inner lens portion being a monolithic lens having an outer surface farther away from the eye and an inner surface closer to the eye; An inner surface and an outer surface of the inner lens section are bonded together, and the lens assembly includes: a, the outer surface of the outer lens section is a convex spherical surface, and the outer surface of the outer lens section has a bifocal addition section; b. The inner surface of said outer lens portion is a single concave surface with a standard predetermined spherical curvature equivalent to about 6 diopters; c. The outer surface of said inner lens portion is a convex spherical surface, typically complementary to the inner side of the single outer lens portion of a predetermined spherical curvature, d1 the inner surface of the inner lens portion includes a cylindrical correction, and the inner lens portion has a non-uniform peripheral thickness; , e, said multi-purpose, spherical outer lens part having the ability and possibility to work in superposition by algebraically adding one of a series of diopter values of each of said unilateral inner lens parts of spherical cylindrical character. to produce said laminated finished multifocal synthetic ophthalmic lenses of any value within the range of +15 to -12 diopters. New II!L mirror combination lens consisting of two parts.

[Brief explanation of the drawing]

tpJ1 is a cross-sectional view of a laminated minus synthetic bifocal lens of the present invention, Fig. 2 is a cross-sectional view of a laminated plus synthetic bifocal lens of the present invention, and Fig. 3 is a laminated plus synthetic bifocal lens of another embodiment of the present invention. FIG. 3 is a cross-sectional view of the lens.

Claims (1)

[Claims] Includes correction for hyperopia, myopia and astigmatism, +15 to -
In a laminated finish multifocal synthetic ophthalmic lens assembly of thicknesses that can be implemented either positive or negative in the range of 12 diopters, said assembly comprises a spherical outer lens part farther from the eye and an inner lens part closer to the eye. and the outer lens portion has refractive power and is a multifocal lens and has an outer surface farther from the eye and an inner surface closer to the eye, and the inner lens portion is a monofocal lens. , having an outer surface farther away from the eye and an inner surface closer to the eye, the inner surface of the outer lens section and the outer surface of the inner lens section being bonded together, the lens assembly comprising: a. an outer surface of the outer lens section; is a convex spherical surface and has a bifocal addition on the outer surface of the outer lens portion, and b. c. the outer side of said inner lens portion is a convex spherical surface and is complementary to the inner side of said single outer lens portion of standard predetermined spherical curvature; d. said inner side The inner surface of the lens portion includes a cylindrical correction, said inner lens portion is of non-uniform circumferential thickness, and e is an algebraic one of a series of values for each diopter value of said monolithic inner lens portion of spherical-cylindrical character. One of the series of diopter values of each of the multifocal spherical outer lens sections having the ability and possibility to work together by additively adding up the stack of any value within the range of +15 to -12 diopters. A new eyeglass combination lens consisting of two parts for making a multifocal composite lens without polishing, characterized in that it produces a finished multifocal composite eyeglass lens.