CN207318823U - A kind of magnified image device of augmented reality - Google Patents
- ️Fri May 04 2018
CN207318823U - A kind of magnified image device of augmented reality - Google Patents
A kind of magnified image device of augmented reality Download PDFInfo
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- CN207318823U CN207318823U CN201721007699.XU CN201721007699U CN207318823U CN 207318823 U CN207318823 U CN 207318823U CN 201721007699 U CN201721007699 U CN 201721007699U CN 207318823 U CN207318823 U CN 207318823U Authority
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Abstract
The utility model discloses a kind of magnified image device of augmented reality, the magnified image device includes left eye microscope group and right eye microscope group, the left eye microscope group and the right eye microscope group include the first speculum group, second speculum group, first speculum group is set along the optical axis of its own, and first speculum group is used to receive the incident light that image is sent out, second speculum group is set along the optical axis of its own, second speculum group is on the reflected light path of first speculum group, second speculum group is used to receive the reflected light reflected through first speculum group, second speculum group can partial light permeability, first speculum group is sequentially arranged with second speculum group along the eyes direction from screen to beholder.The utility model realizes the effect of augmented reality on the basis of virtual reality.
Description
Technical field
It the utility model is related to video image display technology field, and in particular to a kind of magnified image dress of augmented reality.
Background technology
With people material life is pursued it is higher and higher so that people are to various products such as consumables, electronic equipments Usage experience require it is higher and higher.For example, using mobile phone or tablet computer when to watch video, it is desirable to output regards Frequency is enough big and clear.At the same time, with the quickening pace of modern life, for especially for working clan, using television set etc. come The probability of viewing video is fewer and fewer, some small-sized portability equipment such as mobile phone meet the demand of the types of populations on the contrary.
At present, user, which watches mobile video image, mainly two ways：A kind of mode is human eye direct viewing Mobile phone screen Curtain, but need both hands to help, and viewing angle is smaller, influences viewing effect；Another kind is virtual for image left-right format 3D auxiliary Real device, it is that same object is individually imaged respectively by the eyes of people, after lens enlarged drawing obtained by right and left eyes Image has minute differences (parallax), then is obtained through brain system processing, but their functions are single, can only realize that virtual reality is imitated Fruit, can not realize augmented reality effect, can not realize that real-time, interactive is experienced.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of magnified image device of augmented reality, for solving The problem of virtual reality device function certainly of the prior art is single.
For this reason, according to an embodiment of the present application, which includes：
First speculum group, first speculum group are set along the optical axis of its own, and first speculum group is used In the incident light that reception image is sent out；
Second speculum group, second speculum group are set along the optical axis of its own, and second speculum group is in On the reflected light path of first speculum group, second speculum group is used to receive to reflect through first speculum group Reflected light；
Wherein, second speculum group can partial light permeability, first speculum group and the second speculum group edge Eyes direction from screen to beholder is sequentially arranged.
As the further alternative of the magnified image device, the reflection optics of second speculum group facing to The eyes.
As the further alternative of the magnified image device, optical axis and the eyes of second speculum group Oculopupillary optical axis be in same plane.
As the further alternative of the magnified image device, first speculum group and the optical axis of the screen Extending direction it is inconsistent, first speculum group and the extending direction of the optical axis of second speculum group are inconsistent, institute State the second speculum group and the extending direction of the oculopupillary optical axis of the eyes is inconsistent.
As the further alternative of the magnified image device, the first reflection group includes multiple first speculums Piece, second speculum group include multiple second reflecting optics.
As the further alternative of the magnified image device, the focal power of first speculum group is selected from just Number, negative or one or more of zero, the focal power of second speculum group is selected from positive number and/or negative.
As the further alternative of the magnified image device, first speculum group and second speculum The focal power of group meets relational expression：
-0.55<(Φ1+Φ2-(Φ1*Φ2)*d12)<0.55；
Wherein, Φ 1 and Φ 2 is respectively the focal power of first speculum group and second speculum group, and d12 is institute State the equivalent gap between the first speculum group and second speculum group.
As the further alternative of the magnified image device, the surface configuration of first reflecting optics, which is selected from, puts down Face, sphere or it is aspherical in one kind, the surface configurations of second reflecting optics selected from sphere or it is aspherical in one kind.
As the further alternative of the magnified image device, first reflecting optics and second speculum The aspherical surface configuration of piece meets relational expression：
Wherein, z is eyeglass rise, and c is lens curvature, and k is circular cone coefficient, and y is eyeglass bore, and a1~a8 is aspherical height Secondary term coefficient.
As the further alternative of the magnified image device, first reflecting optics and second speculum Piece is made by glass or plastic material.
The beneficial effects of the utility model：
According to the magnified image device in above example, since the eyes direction from screen to beholder has been sequentially arranged First speculum group and the second speculum group, image is sent out the anti-of incident light by the first speculum group and the second speculum group Penetrating realizes the amplification effect of image, then realizes virtual reality with being superimposed for right eye microscope group by left eye microscope group.Simultaneously because the Two-mirror group is partial light permeability, and the transmitted light of such second speculum group adds the real world images effect of external environment condition Fruit, realizes interaction effect, namely realizes the effect of augmented reality.
Brief description of the drawings
, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment Attached drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the utility model, therefore should not be by Regard the restriction to scope as, for those of ordinary skill in the art, without creative efforts, may be used also To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 shows a kind of schematic diagram of the magnified image device of the augmented reality provided according to the embodiment of the present application.
Main element symbol description：
The first speculum groups of 100-；The second speculum groups of 200-；1000- screens；2000- eyes.
Embodiment
The embodiment of the utility model is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning Same or similar element is represented to same or similar label eventually or there is same or like element.Below by ginseng The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and it is not intended that to the utility model Limitation.
In the description of the utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width Degree ", " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer ", The orientation or position relationship of the instruction such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " are based on shown in the drawings Orientation or position relationship, are for only for ease of description the utility model and simplify description, rather than indicate or imply signified dress Put or element there must be specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to the utility model Limitation.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed or Implicitly include one or more this feature.In the description of the utility model, " multiple " are meant that two or two More than, unless otherwise specifically defined.
In the utility model, unless otherwise clearly defined and limited, term " installation ", " connected ", " connection ", " Gu It is fixed " etc. term should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integrally；Can be Mechanically connect or be electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two The interaction relationship of connection or two elements inside element.For the ordinary skill in the art, can basis Concrete condition understands concrete meaning of the above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, fisrt feature is "above" or "below" second feature Can be that the first and second features directly contact, or the first and second features pass through intermediary mediate contact.Moreover, first is special Sign second feature " on ", " top " and " above " can be fisrt feature directly over second feature or oblique upper, or only Represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be with Be fisrt feature immediately below second feature or obliquely downward, or be merely representative of fisrt feature level height and be less than second feature.
Embodiment
A kind of magnified image device of augmented reality is present embodiments provided, referring to Fig. 1, the magnified image device includes Left eye microscope group and right eye microscope group, left eye microscope group include the first speculum group 100 and the second speculum group 200 with right eye microscope group.
First speculum group 100 is set along the optical axis of its own, and the first speculum group 100 is used to receive what image was sent out Incident light.Second speculum group 200 is set along the optical axis of its own, and the second speculum group 200 is in the first speculum group 100 On reflected light path, the second speculum group 200 is used to receive the reflected light reflected through the first speculum group 100.Wherein, second is anti- Penetrate microscope group 200 can partial light permeability, the first speculum group 100 and the second speculum group 200 along double from screen 1000 to beholder 2000 directions of eye are sequentially arranged.
In this way, due to 2000 direction of eyes from screen 1000 to beholder be sequentially arranged the first speculum group 100 with Second speculum group 200, the reflection that incident light is sent out image by the first speculum group 100 and the second speculum group 200 are real The amplification effect of image is showed, then virtual reality is realized with being superimposed for right eye microscope group by left eye microscope group.Simultaneously because second is anti- It is partial light permeability to penetrate microscope group, and the transmitted light of such second speculum group adds the real world images effect of external environment condition, real Existing interaction effect, namely realize the effect of augmented reality.
In addition, in above process and traditional lens are not used to be amplified, therefore conventional lenses are broken away from Many disadvantages, improve the real experiences effect of user.It is at the same time in the above-mentioned reflection process to incident light and unused traditional Lens, broken away from the step of needing the optical aberrations such as software processing aberration, deformation, the present apparatus uses even principle of reflection, because This has been broken away from the step of needing software to carry out mirror image processing, therefore the utility model is realizing the basis that is amplified to image On, also reduce power consumption and software processing difficulty.
The composition letter of the left eye microscope group of device for image in the utility model embodiment and right eye microscope group
It is single, the cost input in production process can be substantially reduced, shortens the production cycle.
User can utilize the video image or double screen that this device for image can be after direct viewing such as mobile phone screen split screen Full-size video image, add viewing effect.
It should be noted that the center line of light beam (light beam) or the symmetry axis of optical system are optical axis.Light beam turns around this axis It is dynamic, there should not be the change of any optical characteristics.For example, when finding the optical axis of jewel, when light leads to from some special direction When crossing heterogeneous body jewel, birefringent phenomenon does not occur.This particular orientation is exactly the optical axis of jewel.
In the utility model embodiment, by the first speculum group 100 and the second speculum group 200 along respective optical axis The amplification quality of image can be improved to a certain extent by setting.Specifically, for the first speculum group 100, first is anti- Microscope group 100 is penetrated when the incident light sent out image is launched, since the first speculum group 100 is set along the direction of its optical axis Put, thus can cause incident light that the change of any optical characteristics will not occur, keep the intrinsic essence of incident light, prevent shadow Picture goes bad.For the second speculum group 200, the second speculum group 200 is being received through the reflection of the first speculum group 100 During reflected light, similarly, since the second speculum group 200 is set along the direction of its optical axis, it can thus cause anti-through first The change of any optical characteristics will not be occurred by penetrating when the reflected light that microscope group 100 reflects passes through the second speculum group 200, keep it solid There is essence, when most entering the eyes of beholder through 200 secondary reflection of the second speculum group afterwards, image will not except after becoming larger Any other change is produced, ensure that the effect of image, ensure that the user experience of user.
In the utility model embodiment, glasses, eyeshade or mask etc. can be made in magnified image device, and some are made Type or the product only wrapped up by crust.At this time, when user puts on above-mentioned glasses, eyeshade or mask viewing mobile phone etc. , it can be achieved that the amplification effect of image during screen.
In some embodiments, the reflection optical surface of the second speculum group 200 can be towards the eyes of beholder, so Amplification effect of the magnified image device to image can be further improved, further increases the visual experience of user.
In some embodiments, the light of the second speculum group 200 of magnified image device left eye microscope group and right eye microscope group Axis is located at corresponding to beholder in the same plane of pupil of human optical axis respectively.Two reflections in left eye microscope group and right eye microscope group Eyeglass can be made separated two panels eyeglass and two panels eyeglass using two eyeglasses and made with double in an actual embodiment The integrative lens of optical axis.So can be according to the actual use demand of different user, it is further provided the experience in user's use Effect.
Further, the first speculum group 100 and the extending direction of the optical axis of screen 1000 are inconsistent, the first speculum group 100 is inconsistent with the extending direction of the optical axis of the second speculum group 200, the second speculum group 200 and the eye pupil hole of eyes 2000 Optical axis extending direction it is inconsistent.
In this way, it on the one hand can ensure the stability of light propagation path come out from screen.Specifically, work as to go out from screen The light come is in the reflection process by the first speculum group 100 and the second speculum group 200, due to the extension side of each optical axis To inconsistent two-by-two, interference will not be produced between light, so as to ensure the quality of amplified image.On the other hand, by first Speculum group 100, the second speculum group 200 are arranged to optical axis and screen 1000, eyes 2000 inconsistent mode two-by-two, can be with The first speculum group 100 and the space occupied by the second speculum group 200 are reduced to a certain extent, so when by the amplification shadow , can be with when foregoing glasses, the eyeshade product that either mask when some moulding or is only wrapped up by crust is made as device So that the overall dimensions of the said goods diminish, to facilitate user to carry or use.
In the utility model embodiment, the first speculum group 100 includes multiple first reflecting optics, the second speculum Group 200 includes multiple second reflecting optics.
Multiple first reflecting optics combine to form the first speculum group 100, are made by the reflection of multiple first reflecting optics With can be overlapped to the incident light come out from screen, so that the intensity or bright of incident light can be improved to a certain extent Degree, ensures the quality of the light Jing Guo the first speculum group 100；Similarly, multiple second reflecting optics combine to form the second reflection Microscope group 200, can be further to the light from the first speculum group 100 out by the reflex of multiple second reflecting optics It is overlapped, so that intensity is obtained after being come out from the second speculum group 200 for light or the further of brightness is strengthened, finally Improve amplification effect of the whole magnified image device to image.
It is understood that in some embodiments, the first speculum group 100 can also be only by a reflecting optics It is made, the second speculum group 200 can also only be made of a reflecting optics, and it is anti-so to reduce by first to a certain extent The manufacture difficulty of 100 and second speculum group 200 of microscope group is penetrated, reduces the input of cost.
In the utility model embodiment, the focal power of the first speculum group in positive number, negative or zero one A or multiple, the focal power of the second speculum group is selected from positive number and/or negative.
Thus, using above-mentioned first speculum group 100 and above-mentioned second speculum group 200 so that the first speculum group 100 and second speculum group 200 possess a variety of collocation modes, it is real to meet the needs of different use groups such as distant vision, myopia The use that a set of magnified image device can meet various different user colonies is showed.
It is understood that when user for myopia when, it is clear that the first speculum group with positive light coke and with positive light Second speculum group of focal power is combined with magnified image, and amplified image can be clearly watched for such user.Work as user For long sight when, it is clear that the first speculum group with negative power is combined to amplify with the second speculum group with negative power Image, amplified image can be clearly watched for such user.
Here, it is necessary to illustrate, due to needing to realize the amplification effect influenced, the second speculum group is unsuitable Using zero focal power.
Further, in order to ensure the first speculum group can be combined correctly with the second speculum group, in some embodiment party In formula, the focal power of the first speculum group and second speculum group meets relational expression：
-0.55<(Φ1+Φ2-(Φ1*Φ2)*d12)<0.55；
Wherein, Φ 1 and Φ 2 is respectively the focal power of first speculum group 100 and second speculum group 200, Equivalent gaps of the d12 between first speculum group 100 and second speculum group 200.
It can be standardized according to the first reflecting optics that relation above formula produces and the second reflecting optics so that producing During first reflecting optics and the second reflecting optics, production efficiency is improved, shortens the production cycle.
In the utility model embodiment, the surface configurations of the first reflecting optics selected from plane, sphere or it is aspherical in One kind, the surface configurations of the second reflecting optics selected from sphere or it is aspherical in one kind.
It is appreciated that the first reflecting optics and the second reflecting optics is that the selection of surface configuration should be with hereinbefore light focus The selection of degree is adapted.For example, plane corresponds to zero focal power, convex surface (sphere is aspherical) corresponding positive light coke or concave surface (sphere is aspherical) corresponds to negative power.
When the surface configuration of the first reflecting optics and the second reflecting optics is chosen for plane or sphere, according to usual tool The eyeglass for having such shape is manufactured.
It should be noted that when the first reflecting optics and the second reflecting optics selection it is aspherical when, the first reflecting optics with The aspherical surface configuration of second reflecting optics can meet relational expression：
Wherein, z is eyeglass rise, and c is lens curvature, and k is circular cone coefficient, and y is eyeglass bore, and a1~a8 is aspherical height Secondary term coefficient.
It can be standardized according to the first reflecting optics that relation above formula produces and the second reflecting optics so that producing During first reflecting optics and the second reflecting optics, production efficiency is improved, shortens the production cycle.
In some embodiments, the first reflecting optics and the second reflecting optics are more than 50 low dispersion by abbe number Optical material is made.
In addition to the above, in some embodiments, the first speculum group 100 is set with 200 activity of the second speculum group Put between screen and the eyes of beholder.
In this way, sending out image the reflection of incident light with the second speculum group 200 by the first speculum group 100 realizes The amplification effect of image, simultaneously because the first speculum group 100 and the second speculum group 200 are movably arranged on screen and beholder Eyes between, so allow for the first speculum group 100 and screen 1000, the first speculum group 100 and the second speculum group 200 and second speculum group 200 and the distance between eyes 2000 it is adjustable, it is achieved thereby that the reality to magnified image effect When adjust, substantially increase user experience.
In order to realize that the activity of the first speculum group 100 and the second speculum group 200 is set, in some embodiments, Hereinbefore glasses, eyeshade either some moulding such as mask or only by crust bag can be made in magnified image device During the product wrapped up in, set in glasses, eyeshade either mask or shell anti-for the first speculum group 100 and second The slideway of the movement of microscope group 200 is penetrated, is the activity that the first speculum group 100 and the second speculum group 200 can be achieved by the slideway Set., can also be by either some moulding such as mask or only by crust of glasses, eyeshade in other embodiments The form of retractable is made in the product of parcel, and the first speculum group 100 and second is realized by freely stretching for they The activity of speculum group 200.
The first speculum group 100, the second speculum group 200 of the magnified image device an of the utility model is set forth below Cases of design, such as following table：
Table one：Optical component parameter table
Description more than to each embodiment of the utility model, the utility model at least possess following technology Effect：
1st, possesses magnified image function；
2nd, virtual reality is realized, improves the real experiences effect of user；
3rd, realize that real-time, interactive is experienced, realize the effect of augmented reality；
4th, various use groups are applicable in；
5th, overall dimensions can accomplish smaller；
6th, it is simple in structure, cost is low.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term State and be necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with Combine in an appropriate manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this area Technical staff can by the different embodiments or example described in this specification and different embodiments or exemplary feature into Row combines and combination.
Although the embodiment of the utility model has been shown and described above, it is to be understood that above-described embodiment is Exemplary, it is impossible to the limitation to the utility model is interpreted as, those of ordinary skill in the art are in the scope of the utility model It is interior above-described embodiment to be changed, changed, replaced and modification.
Claims (10)
1. the magnified image device of a kind of augmented reality, it is characterised in that including left eye microscope group and right eye microscope group, the left eyeglass Group and the right eye microscope group include：
First speculum group, first speculum group are set along the optical axis of its own, and first speculum group is used to connect Receive the incident light that image is sent out；
Second speculum group, second speculum group are set along the optical axis of its own, and second speculum group is in described On the reflected light path of first speculum group, second speculum group is used to receive through the anti-of first speculum group reflection Penetrate light；
Wherein, second speculum group can partial light permeability, first speculum group and second speculum group are along from screen Curtain is sequentially arranged to the eyes direction of beholder.
2. magnified image device as claimed in claim 1, it is characterised in that the reflection optics of second speculum group faces To the eyes.
3. magnified image device as claimed in claim 2, it is characterised in that the optical axis of second speculum group and described pair The oculopupillary optical axis of eye is in same plane.
4. magnified image device as claimed in claim 1, it is characterised in that first speculum group and the light of the screen The extending direction of axis is inconsistent, and first speculum group and the extending direction of the optical axis of second speculum group are inconsistent, Second speculum group and the extending direction of the oculopupillary optical axis of the eyes are inconsistent.
5. such as claim 1-4 any one of them magnified image devices, it is characterised in that the first reflection group includes multiple First reflecting optics, second speculum group include multiple second reflecting optics.
6. magnified image device as claimed in claim 5, it is characterised in that the focal power of first speculum group is selected from just Number, negative or one or more of zero, the focal power of second speculum group is selected from positive number and/or negative.
7. magnified image device as claimed in claim 6, it is characterised in that first speculum group and the described second reflection The focal power of microscope group meets relational expression：
-0.55<(Φ1+Φ2-(Φ1*Φ2)*d12)<0.55；
Wherein, Φ 1 and Φ 2 is respectively the focal power of first speculum group and second speculum group, and d12 is described the Equivalent gap between one speculum group and second speculum group.
8. magnified image device as claimed in claim 5, it is characterised in that the surface configuration of first reflecting optics is selected from Plane, sphere or it is aspherical in one kind, the surface configurations of second reflecting optics selected from sphere or it is aspherical in one kind.
9. magnified image device as claimed in claim 8, it is characterised in that first reflecting optics and the described second reflection The aspherical surface configuration of eyeglass meets relational expression：
<mrow> <mi>Z</mi> <mo>=</mo> <mfrac> <mrow> <msup> <mi>cy</mi> <mn>2</mn> </msup> </mrow> <mrow> <mn>1</mn> <mo>+</mo> <mi>s</mi> <mi>q</mi> <mi>r</mi> <mi>t</mi> <mrow> <mo>(</mo> <mn>1</mn> <mo>-</mo> <mo>(</mo> <mrow> <mn>1</mn> <mo>+</mo> <mi>k</mi> </mrow> <mo>)</mo> <msup> <mi>c</mi> <mn>2</mn> </msup> <msup> <mi>y</mi> <mn>2</mn> </msup> <mo>)</mo> </mrow> </mrow> </mfrac> <mo>+</mo> <msub> <mi>a</mi> <mn>1</mn> </msub> <msup> <mi>y</mi> <mn>2</mn> </msup> <mo>+</mo> <msub> <mi>a</mi> <mn>2</mn> </msub> <msup> <mi>y</mi> <mn>4</mn> </msup> <mo>+</mo> <msub> <mi>a</mi> <mn>3</mn> </msub> <msup> <mi>y</mi> <mn>6</mn> </msup> <mo>+</mo> <msub> <mi>a</mi> <mn>4</mn> </msub> <msup> <mi>y</mi> <mn>8</mn> </msup> <mo>+</mo> <msub> <mi>a</mi> <mn>5</mn> </msub> <msup> <mi>y</mi> <mn>10</mn> </msup> <mo>+</mo> <msub> <mi>a</mi> <mn>6</mn> </msub> <msup> <mi>y</mi> <mn>12</mn> </msup> <mo>+</mo> <msub> <mi>a</mi> <mn>7</mn> </msub> <msup> <mi>y</mi> <mn>14</mn> </msup> <mo>+</mo> <msub> <mi>a</mi> <mn>8</mn> </msub> <msup> <mi>y</mi> <mn>16</mn> </msup> <mo>;</mo> </mrow>
Wherein, z is eyeglass rise, and c is lens curvature, and k is circular cone coefficient, and y is eyeglass bore, and a1~a8 is aspherical high-order term Coefficient.
10. magnified image device as claimed in claim 5, it is characterised in that first reflecting optics and described second anti- Eyeglass is penetrated to be made by low dispersion optical material of the abbe number more than 50.
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* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107247326A (en) * | 2017-08-11 | 2017-10-13 | 深圳市辰羿科技有限公司 | A kind of magnified image device of augmented reality |
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2017
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Cited By (1)
* Cited by examiner, † Cited by third party| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107247326A (en) * | 2017-08-11 | 2017-10-13 | 深圳市辰羿科技有限公司 | A kind of magnified image device of augmented reality |
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| 2020-07-24 | CF01 | Termination of patent right due to non-payment of annual fee |
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