CN1160853A - Combined multifocal toric lens designs - Google Patents
Combined multifocal toric lens designs Download PDFInfo
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- CN1160853A CN1160853A CN 96106294 CN96106294A CN1160853A CN 1160853 A CN1160853 A CN 1160853A CN 96106294 CN96106294 CN 96106294 CN 96106294 A CN96106294 A CN 96106294A CN 1160853 A CN1160853 A CN 1160853A
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Abstract
Combined multifocal toric lens designs are disclosed which combine a correction for astigmatism, either corneal or lenticular, with a correction for presbyopia. One of the front and back surfaces of the lens defines a toric surface for an astigmatic optical correction, and one of the front and back surfaces, which can be the same surface or the opposite surface, defines a multifocal surface for a presbyopic optical correction, to provide visual acuity for astigmatic presbyopes. Embodiments are disclosed wherein one surface of the lens design has a combined concentric annular ring, multifocal toric surface, and the other surface of the lens design has a spherical or aspherical surface.
Description
In general, the present invention relates to the combined multifocal toric lens design, relate in particular to proofreading and correct the combined multifocal toric lens design that cornea or crystal astigmatism and correct presbyopia combine.
In more detail, the invention provides the presbyopia with many focuses concentric ring lens, wherein in the preceding minute surface of lens or the back minute surface limits the double-curved surface that optics of astigmatism is proofreaied and correct usefulness, and, one before the lens in minute surface or the back minute surface limits many focuses face that the presbyopia optical correction is used, so that provide visual acuity for the presbyopia.
Traditional soft contact lens of many focuses and intraocular lens not only provide long distance but also low coverage sphere dioptric power are provided.But many patients are because cornea or crystal astigmatism can not obtain enough visual acuities.
The present invention relates to have the ophthalmic lens of combined multifocal toric lens design, relate in particular to and have more than one dioptric powers or focal length, be in particular the contact lens of presbyopia's design, for example soft hydrogel plaster eyelens, and intraocular lens.
As is generally known along with the age increases, the adaptive faculty of eyes weakens, so-called adaptive faculty is exactly the natural lens bending that makes in the eyes, so that focus on the nearer object of observer.This situation is called presbyopia, and past presbyopia patient relies on glasses or the lens with different dioptric powers zone, makes the people who wears glasses move his sight line, finds suitable dioptric power for he wants the one or more objects that focus on.
Similarly, replace the people of intraocular lens because catastrophic situation has to extract the natural lens in the eyes, completely lose and adjust lens to adapt to the ability of the object distance of desiring to look.In this case, the lens that provide normally are arranged on the focusing power of single limited distance, wear glasses, so that provide required extra forward dioptric power with interior nearer vision for focus again.For such patient, functional multi-focus lens can be useful especially.
Prior art also knows, in some cases, the image that brain can be accepted to focus on, and repel out-of-focus image, thus identification separate several images of vying each other.
The double-curved surface contact lens has cylindrical optic surface/dioptric power, in order to proofread and correct patient's astigmatism.By statistics, people's astigmatism at first occurs near the transverse axis or Z-axis of eye, but also may occur in any position.In prior art, for every kind of contact lens different double-curved surface dioptric power and for each different orientation of double-curved surface cylinder axis, all need independent a kind of double-curved surface contact lens, this is that the different astigmatism that adapt on the different axis of different patients are necessary.
So the plastic pattern casting die that the stock of double-curved surface contact lens or molded double-curved surface contact lens are used will comprise the multiple various combination of double-curved surface shaft position and double-curved surface dioptric power.
Be entitled as ' pupil fine setting multifocal eye section lens ' application number is 07/988,088 application for patent (attorney docket VTN56) has disclosed the concentric ophthalmic lens of many focuses that a kind of presbyopia patient uses, partly constitute by three general lens rings, adopt many focus designs.The central circular shaped section of lens has only the distance correction ability to patient, the outside is around first annular inner portion, it is made up of a plurality of gardens ring, radially improve patient's low coverage focusing ability by the garden ring of lining, the outside is around long distance dioptric power and the variable radial component of low coverage dioptric power convergence correction semi-invariant to the patient.Their outside is again around the second outer garden loop section, and it also is made up of one or more gardens ring, at the circumferential section near the ophthalmic lens optical surface region, has additional telefocus ability.Each garden ring is not to have the low coverage dioptric power to have the long distance dioptric power exactly, works together in conjunction with the lens remainder, and just this part at lens produces the focus ratio that requires.
So first purpose of the present invention provides a kind of proofreading and correct the combined multifocal toric lens design that cornea or crystal astigmatism and correct presbyopia combine.
Open below several embodiments of the present invention, wherein:
A minute surface of this lens design contains the double-curved surface calibration function, and another minute surface of lens design provides the presbyopia calibration function, it can comprise that as application number be 07/988,088 and 07/988, the described concentric multi-focus lens design of 071 U.S. Patent application book (attorney docket VTN56 and VTN57), perhaps comprise other presbyopia lens design that contain more than one sphere or aspheric surface dioptric power (such as aspheric surface, segmental arc, gradual change aspheric surface, diffraction, birefringence or other concentric faces), comprise in general:
Minute surface combines with minute surface after many focuses before the double-curved surface, or
Mirror combines with minute surface behind the face double-curved surface before many focuses, or in other embodiments,
A minute surface of lens design contains compound concentric multifocal toric, and another minute surface of lens design contains sphere or aspheric surface calibration function, and generally comprises:
Minute surface combines with minute surface before the sphere after the many focuses of double-curved surface, and this is a most preferred embodiment, perhaps
Minute surface combines with amplifying the preceding minute surface of minute surface (booster) or aspheric surface after the many focuses of double-curved surface, and this is second most preferred embodiment, perhaps
Minute surface combines with minute surface before the many focuses of double-curved surface behind the sphere, perhaps
Minute surface combines with minute surface before the many focuses of double-curved surface after amplifying minute surface or aspheric surface.
The position stability that above-mentioned all embodiment may require to relate to ballast and slab-off characteristics at the preceding minute surface or the back minute surface of lens, this is that prior art is known, so these known characteristics no longer illustrate in the accompanying drawings.
According to the instruction here, the invention provides many focuses concentric ring lens that a kind of presbyopia uses, wherein in the preceding minute surface of lens and the back minute surface limits the double-curved surface that astigmatism correction is used, and in the minute surface another of the preceding minute surface of lens and back limits many focuses face that presbyopia is proofreaied and correct usefulness, so that provide visual acuity for the presbyopia.In certain embodiments, an independent minute surface just can contain two kinds of calibration functions, and has compound many focuses of the double-curved surface minute surface with a plurality of double-curved surfaces garden ring.
In more detail, double-curved surface can limit a center, and this center comprises having the toric double-curved surface garden dish corresponding with the long distance dioptric power.This center by a plurality of double-curved surfaces garden ring around, these double-curved surface annulus comprise at least one ring of the double-curved surface garden with low coverage dioptric power and at least one has the double-curved surface garden ring of long distance dioptric power.The double-curved surface garden ring that described a plurality of double-curved surfaces garden ring preferably includes the double-curved surface garden ring with low coverage dioptric power alternately and has the long distance dioptric power, and innermost double-curved surface garden ring has the low coverage dioptric power, and innermost next double-curved surface garden ring has the long distance dioptric power.In addition, can also change the width of each double-curved surface garden ring, to produce the dioptric power curve of a long distance dioptric power to the different ratios of low coverage dioptric power.The double-curved surface minute surface can comprise the preceding minute surface or the back minute surface of lens, and same back minute surface or preceding minute surface, perhaps its reverse side that can comprise lens of many focuses minute surface.
In several embodiment, many focuses minute surface limits a center, and this center comprises the sphere garden dish with sphere corresponding with the long distance dioptric power.A plurality of gardens are encircled around this center, and comprise that at least one ring of the garden with low coverage dioptric power and at least one have the garden ring of long distance dioptric power.The garden ring that described a plurality of gardens ring preferably includes the garden ring with low coverage dioptric power alternately and has the long distance dioptric power, and innermost garden ring has the low coverage dioptric power, innermost next garden ring has the long distance dioptric power.In addition, the width of each garden ring can be different, to produce the dioptric power curve of a long distance dioptric power to the different ratios of low coverage dioptric power.In the ring embodiment of these gardens, double-curved surface is at the reverse side (preceding minute surface is to the back minute surface) of many focuses minute surface.These lens can comprise the contact lens that is worn on the cornea, and for example soft hydrogel plaster eyelens also can be an intraocular lens.
In conjunction with the accompanying drawings, with reference to the detailed description to several optimum examples of carrying out below in conjunction with accompanying drawing, the professional and technical personnel can be more readily understood above-mentioned purpose and the advantage of the present invention about the combined multifocal toric lens design.In all several views of accompanying drawing, similarly parts are marked with identical label.Wherein:
Fig. 1 and 2 is respectively planar rear view and the side view of first embodiment of combined multifocal toric lens of the present invention design, and in a most preferred embodiment, these lens have minute surface behind the concentric ring multifocal toric, combine with minute surface before the sphere; And in second most preferred embodiment, described back minute surface combines with minute surface before magnifier (booster) or the aspheric surface.
Fig. 3 and 4 is respectively front plan view and the side view of second embodiment of combined multifocal toric contact lens of the present invention, and these lens have spherical back minute surface or the non-spherical back minute surface that combines with minute surface before the concentric ring multifocal toric.
Fig. 5 and 6 is respectively forward sight and the planar rear view of the 3rd embodiment of combined multifocal toric contact lens of the present invention, and these lens have minute surface before the double-curved surface that combines with minute surface after the many focuses of concentric ring.
Fig. 7 and 8 is respectively forward sight and the planar rear view of the 4th embodiment of combined multifocal toric contact lens of the present invention, and these lens have minute surface before the many focuses of the concentric ring that combines with minute surface behind the double-curved surface.
In first general embodiment, a minute surface of lens design contains the double-curved surface corrective action, and another minute surface of lens design provides the presbyopia corrective action, it comprises that as application number be 07/988,088 and 07/988, the described concentric multi-focus lens design of 071 U.S. Patent application book (attorney docketVTN56 and VTN57), perhaps other contain the presbyopia lens design of more than one sphere or aspheric surface dioptric power (for example aspheric surface, segmental arc, gradual change aspheric surface, diffraction, birefringence or other concentric gardens), and generally comprise:
Minute surface combines with minute surface after the focus more than before the double-curved surface, or
Minute surface combines with minute surface behind the double-curved surface before the focus more than.
In second general embodiment, a minute surface of lens design contains a concentric multifocal toric minute surface, and another minute surface of lens design contains sphere or aspheric surface is proofreaied and correct, and generally comprises:
In most preferred embodiment, minute surface combines with minute surface before the sphere after the many focuses of double-curved surface, or
In second most preferred embodiment, minute surface combines with minute surface before the magnifier aspheric surface after the many focuses of double-curved surface, or
Minute surface combines with minute surface before the multifocal toric behind the sphere, or
Minute surface combines with minute surface before the multifocal toric after the aspheric surface.
Fig. 1 and 2 is respectively planar rear view and the side view of first embodiment of combined multifocal toric contact lens of the present invention 10 designs, and in most preferred embodiment, these lens have minute surface 12 behind the concentric ring multifocal toric, combine with minute surface before the sphere 14; And in second most preferred embodiment, described back minute surface combines with minute surface 14 before magnifier (boost) aspheric surface.This non-spherical minute surface can be any selected aspheric surface that is suitable for the wearer is carried out vision correction.
Minute surface 12 limits a center behind the double-curved surface, and this center comprises having and the corresponding toric double-curved surface of long distance dioptric power (being masked as D) garden dish 16.A plurality of double-curved surfaces garden ring 18,20,22,24 is around center 16, and double-curved surface garden ring 18 and 22 has low coverage dioptric power (being masked as N), and double-curved surface garden ring 20 and 24 has long distance dioptric power (being masked as D).The double-curved surface garden ring that this a plurality of double-curved surfaces garden ring preferably includes the double-curved surface garden ring with low coverage dioptric power alternately and has the long distance dioptric power, and innermost double-curved surface garden ring 18 has the low coverage dioptric power, and innermost next double-curved surface garden ring 20 has the long distance dioptric power.In addition, as shown in Figure 1, the width of each double-curved surface garden ring can be different, to produce the dioptric power curve of a long distance dioptric power to the different ratios of low coverage dioptric power.
In more detail, one as an example and among the embodiment of design, double-curved surface garden, center dish 16 and garden ring 20 and 24 have 8.4 millimeters of long distance dioptric power radiuses, and garden ring 18 and 22 has 8.694 millimeters of low coverage dioptric power radiuses.Middle radius-of-curvature is 8.380 millimeters, and the circumferential curvature radius is 9.82 millimeters, to provide-the right cylinder dioptric power of 1.25D.
Double-curved surface garden, center dish 16 has 2.00 millimeters of horizontal widths, 1.7828 millimeters of vertical heights, double-curved surface garden ring 18 has 3.3 millimeters of horizontal widths, 2.9279 millimeters of vertical heights, double-curved surface garden ring 20 has 4.25 millimeters of horizontal widths, 3.7968 millimeters of vertical heights, double-curved surface garden ring 22 has 5.2 millimeters of horizontal widths, 4.6265 millimeters of vertical heights, double-curved surface garden ring 24 has 8.0 millimeters of horizontal widths, 7.1745 millimeters of vertical heights.
Double-curved surface garden, center dish 16 and the recombination region of forming around its annulus 18 to 24 comprise effective optical zone of lens, around it be a lens (non-optical) district 26, zone 26 is in its excircle 28 places attenuation gradually, until the cylindrical periphery of lens.In the embodiment that designs as an example of Fig. 1 and 2, the diameter that begins to locate until weakened section 28 of lens annulus 26 is 13.0 millimeters, 14.0 millimeters of lens excircle diameters.
Fig. 3 and 4 is respectively front plan view and the side view of second embodiment of combined multifocal toric contact lens 30 of the present invention, and these lens have spherical back minute surface 32 or the non-spherical back minute surface 32 that combines with minute surface 34 before the concentric ring multifocal toric.Minute surface 34 limits the center before the concentric ring multifocal toric, and this center has the double-curved surface garden dish 36 with the corresponding double-curved surface minute surface of long distance dioptric power.A plurality of double-curved surfaces garden ring 38,40,42,44 is around described center, and wherein double-curved surface garden ring 38 and 42 has the low coverage dioptric power, and double-curved surface garden ring 40 and 44 has the long distance dioptric power.Except the limit be opposite, double-curved surface minute surface 34 is similar to the double-curved surface minute surface 14 in Fig. 1 and 2 basically, is applicable to the embodiment of Fig. 3 and 4 for the explanation that embodiment did, diameter and the dioptric power etc. of Fig. 1 and 2.
Fig. 5 and 6 is respectively forward sight and the planar rear view of the 3rd embodiment of combined multifocal toric contact lens 30 of the present invention, and these lens have minute surface 52 before the double-curved surface that combines with minute surface 54 after the many focuses of concentric ring.Minute surface 52 comprises big double-curved surface minute surface 56 before the double-curved surface, and double-curved surface minute surface 56 has the transverse axis among Fig. 5, its area covered with lens reverse side 54 on the substantially the same area of each concentric ring.The orientation of right cylinder dioptric power and cylinder axis is followed patient's astigmatic prescription.Double-curved surface minute surface 56 by lens (non-optical) district 58 around, the latter begins attenuation at 59 places, until the cylindrical periphery of lens.
Minute surface 54 limits the center after many focuses, and this center comprises the sphere garden dish 60 with sphere corresponding with the long distance dioptric power.A plurality of gardens ring 62,64,66,68,70 and 72 is around center 60, and wherein garden ring 62,66 and 70 has the low coverage dioptric power, and garden ring 64,68 and 72 has the long distance dioptric power.The double-curved surface garden ring that described a plurality of gardens ring preferably includes the garden ring with low coverage dioptric power alternately and has the long distance dioptric power, and innermost garden ring 62 has the low coverage dioptric power.In addition, as shown in Figure 6, the width of each garden ring can be different, to produce the dioptric power curve of a long distance dioptric power to the different ratios of low coverage dioptric power.The lens light school district that overall diameter surrounded of garden ring 72 by 74 in a lens (non-optical) district around, until the lens circumference edge.
Fig. 7 and 8 is respectively forward sight and the planar rear view of the 4th embodiment of combined multifocal toric contact lens 80 of the present invention, and these lens have minute surface 82 before the many focuses of concentric ring that combine with minute surface 84 behind the double-curved surface.Fig. 7 is similar with 6 embodiment to Fig. 5 substantially with 8 embodiment, but many focuses minute surface is the preceding minute surface of lens here, and the double-curved surface minute surface is the back minute surface of lens.But the orientation of the cylinder axis of Fig. 8 is vertical now, and the orientation of the cylinder axis of Fig. 6 is a level.Therefore, the embodiment that is equally applicable to Fig. 7 and 8 for explanation and the explanation of Fig. 5 and 6 embodiment.
Lens can be the contact lenses that is worn on the eyes cornea, and for example soft hydrogel plaster eyelens perhaps can be an intraocular lens.Center and a plurality of garden are encircled on the back minute surface that is preferably in contact lens and are formed, so that the dazzling problem of flash of light is reduced to minimum.
The size of human eye pupil is one and depends on the function with light intensity, and at ophthalmic lens, especially is an important parameters in the design of contact lens and intraocular lens.
In addition, (INVIVO) image quality measurement instrument can be used for making that the eye image quality in the concentric ring lens design reaches optimum in the eyes body, to produce further improved design.This adopts following method to realize, promptly, use interior (INVIVO) image quality measurement instrument of body to measure and reduce total aberration of the lens on the patient's eye that designs the first time, so that measurement residual aberration, then from new design lens, with the residual aberration that reduces to measure, improve visual acuity and performance.Lens can comprise and limit the relative minute surface aspherisation of minute surface of center and a plurality of garden ring from new design, perhaps with concentric ring minute surface aspherisation.In addition, preferably also utilize aberration instrument and MTF point distribution instrument to measure the modulation transfer function of lens-eyes combination.
Obviously, by the number of change garden ring, the width and the arrangement of garden ring, and the dioptric power of giving each garden ring, the present invention can have many different embodiment.
Described the several embodiment and the variation thereof of combined multifocal toric lens design of the present invention here in detail, but discovery of the present invention and instruction for the people who is familiar with one's own profession, have been pointed out many different designs, this should be very clearly.
Claims (18)
1. many focuses concentric ring lens that astigmatic presbyopia uses is characterized in that:
A. these lens have preceding minute surface and relative back minute surface, and one in preceding minute surface and the back minute surface limits the double-curved surface minute surface that astigmatism correction is used, and
B. in the minute surface another of preceding minute surface and back limits many focuses minute surface that presbyopia is proofreaied and correct usefulness, so that provide visual acuity for astigmatic presbyopia patient.
2. many focuses concentric ring lens of using of the astigmatic presbyopia who proposes as claim 1, it is characterized in that: the double-curved surface minute surface limits a center, this center comprises having the toric double-curved surface garden dish corresponding with the long distance dioptric power, a plurality of double-curved surfaces garden ring is around described center, have at least a double-curved surface garden ring to have the low coverage dioptric power in described a plurality of double-curved surface annulus, and have at least a double-curved surface garden ring to have the long distance dioptric power.
3. many focuses concentric ring lens of using of the astigmatic presbyopia who proposes as claim 1, it is characterized in that: described many focuses minute surface comprises a plurality of spherical minute surfaces.
4. as weighing the many focuses concentric ring lens that must ask the 1 astigmatic presbyopia who proposes to use, it is characterized in that: described many focuses minute surface comprises amplification minute surface or non-spherical minute surface.
5. many focuses concentric ring lens of using of the astigmatic presbyopia who proposes as claim 2 is characterized in that: described a plurality of double-curved surface annulus comprise that alternately low coverage dioptric power double-curved surface garden ring and long distance dioptric power double-curved surface garden encircle.
6. many focuses concentric ring lens of using of the astigmatic presbyopia who proposes as claim 2, it is characterized in that: innermost double-curved surface garden ring has the low coverage dioptric power, and innermost second double-curved surface garden ring has the long distance dioptric power.
7. as many focuses concentric ring lens of claim 2 proposition, it is characterized in that: the width difference of each double-curved surface garden ring, so that produce the dioptric power curve of long distance dioptric power to the different ratios of low coverage dioptric power.
8. many focuses concentric ring lens of using of the astigmatic presbyopia who proposes as claim 1, it is characterized in that: described double-curved surface minute surface comprises the preceding minute surface of lens, and many focuses minute surface also comprises the preceding minute surface of lens.
9. many focuses concentric ring lens of using of the astigmatic presbyopia who proposes as claim 1, it is characterized in that: described double-curved surface minute surface comprises the back minute surface of lens, many focuses minute surface also comprises the back minute surface of lens.
10. many focuses concentric ring lens of using of the astigmatic presbyopia who proposes as claim 1, it is characterized in that: described many focuses minute surface limits a center, described center comprises the sphere garden dish with long distance dioptric power, a plurality of gardens ring is around this center, and have at least a garden ring to have the low coverage dioptric power in described a plurality of annulus, have at least a garden ring to have the long distance dioptric power.
11. many focuses concentric ring lens that the astigmatic presbyopia who proposes as claim 10 uses is characterized in that: described a plurality of gardens ring comprises garden ring with long distance dioptric power alternately and the garden ring with low coverage dioptric power.
12. many focuses concentric ring lens that the astigmatic presbyopia who proposes as claim 10 uses is characterized in that: described innermost garden ring has the low coverage dioptric power, and innermost second garden ring has the long distance dioptric power.
13. the many focuses concentric ring lens as claim 10 proposes is characterized in that: the width difference of each garden ring, so that produce the dioptric power curve of long distance dioptric power to the different ratios of low coverage dioptric power.
14. as many focuses concentric ring lens that claim 10 proposes, it is characterized in that: described double-curved surface minute surface comprises the preceding minute surface of lens, and described many focuses minute surface comprises the back minute surface of lens.
15. as many focuses concentric ring lens that claim 10 proposes, it is characterized in that: described double-curved surface minute surface comprises the back minute surface of lens, and described many focuses minute surface comprises the preceding minute surface of lens.
16. as many focuses concentric ring lens that claim 1 proposes, it is characterized in that: described lens comprise the contact lens that is worn on the eyes cornea.
17. as many focuses concentric ring lens that claim 13 proposes, it is characterized in that: described contact lens comprises soft hydrogel plaster eyelens.
18. as many focuses concentric ring lens that claim 1 proposes, it is characterized in that: described lens comprise intraocular lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96106294 CN1160853A (en) | 1995-05-04 | 1996-05-03 | Combined multifocal toric lens designs |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US433843 | 1995-05-04 | ||
| CN 96106294 CN1160853A (en) | 1995-05-04 | 1996-05-03 | Combined multifocal toric lens designs |
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| CN1160853A true CN1160853A (en) | 1997-10-01 |
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| CN 96106294 Pending CN1160853A (en) | 1995-05-04 | 1996-05-03 | Combined multifocal toric lens designs |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401317C (en) * | 2000-10-12 | 2008-07-09 | 里巴贝鲁株式会社 | Information terminal |
| CN108205194A (en) * | 2017-12-13 | 2018-06-26 | 北京华航无线电测量研究所 | A kind of visible ray based on spherical concentric primary mirror and infrared hybrid system |
-
1996
- 1996-05-03 CN CN 96106294 patent/CN1160853A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100401317C (en) * | 2000-10-12 | 2008-07-09 | 里巴贝鲁株式会社 | Information terminal |
| CN108205194A (en) * | 2017-12-13 | 2018-06-26 | 北京华航无线电测量研究所 | A kind of visible ray based on spherical concentric primary mirror and infrared hybrid system |
| CN108205194B (en) * | 2017-12-13 | 2020-07-17 | 北京华航无线电测量研究所 | Visible light and infrared composite system based on spherical concentric primary mirror |
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