CN202614974U - Hexagonal columnar optical band cloaking device constructed by using anisotropic medium - Google Patents
Hexagonal columnar optical band cloaking device constructed by using anisotropic medium Download PDFInfo
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- CN202614974U CN202614974U CN 201120549114 CN201120549114U CN202614974U CN 202614974 U CN202614974 U CN 202614974U CN 201120549114 CN201120549114 CN 201120549114 CN 201120549114 U CN201120549114 U CN 201120549114U CN 202614974 U CN202614974 U CN 202614974U
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- anisotropic medium
- medium unit
- optical band
- stealthy
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Abstract
The utility model discloses a hexagonal columnar optical band cloaking device constructed by using an anisotropic medium. The device is a shell with a cavity, wherein the shell is formed by six transparent anisotropic medium units in an encircling mode. The anisotropic medium units are cylinders, wherein cross sections of the cylinders are isosceles trapezoids. A side surface where a waist of the cross section of the each anisotropic medium unit is located is jointed with the side surface where the corresponding waist of the cross section of the adjacent anisotropic medium unit is located. The side surfaces where lower bottom edges of the cross sections of all the anisotropic medium units are located form an outer wall of the shell. The side surfaces where upper bottom edges of the cross sections of all the anisotropic medium units are located form an inner wall of the shell. The cavity of the shell is used to place an object to be cloaked. When light passes through the device of the utility model, through using the anisotropic medium to control a propagation direction of the light and make the light bypass the intermediate cavity and through making that the direction of emergent light is the same with the direction of original incident light, six direction cloaking effects are possessed. And the device is suitable for the whole visible optical band.
Description
Technical field
The utility model relates to a kind of stealthy device of hexagonal cylindrical optical band that utilizes the anisotropic medium structure, belongs to the stealthy field of visible light.
Background technology
Stealthy is human a kind of ideal for a long time always, but stealth technology never realizes for a long time.Existing stealth technique mainly is in the microwave section, body surface smear can absorbing radar wave material, prevent that target from being found by radar, thus realize stealthy, yet this technology is not real stealthy, and at visible light wave range, it is visible that object remains.In optical band, existing stealth technology still is a military camouflage color etc. mainly, yet this also is a kind of camouflage rather than real from sight line, disappearing.A kind of concealed device is arranged,, be presented at opposite side after the object of a side taken, but its effect receives the quality influence of image, and need extra energy, install also more complicated through camera and display screen.Also have a kind of mode, through optical fiber, with light from one side directed to opposite side, thereby the object in the middle of walking around, but such device is higher to the technological requirement of optical fiber, and can only realize stealthy on the direction.
The utility model content
The purpose of the utility model is to provide a kind of stealthy device of hexagonal cylindrical optical band that utilizes the anisotropic medium structure.
Anisotropic medium is meant electromagnetic parameter different material on all directions, and the utility model utilizes this special nature of anisotropic medium, and it is applied to stealth technology.The utility model is with the material of anisotropic media as the stealthy device of structure overall optical wave band; Through the optical transform method; And carry out suitable simplification; Choose suitable anisotropic media electromagnetic parameter, thereby the simple structure of obtaining, be easy to realize, stable performance, have the six direction stealth effect, be applicable to the stealthy device of whole visible light wave range.
For realizing above-mentioned purpose; The technical scheme that the utility model is taked is: the stealthy device of the utility model optical band is the housing of the band cavity that surrounded by six transparent anisotropic medium unit; Said anisotropic medium unit is the cylinder that xsect is isosceles trapezoid, and the side at each waist place of the xsect of each anisotropic medium unit fits together with the side that corresponding waist with the xsect of its adjacent anisotropic medium unit belongs to.The side at the place, bottom of the xsect of all anisotropic medium unit surrounds the outer wall of said housing; The side at the place, last base of the xsect of all anisotropic medium unit surrounds the inwall of said housing, and the cavity of said housing is desired by stealthy object in order to placement.
Further, the electromagnetic parameter of the said anisotropic medium of the utility model unit is electrical anisotropy medium and/or magnetic anisotropy medium.
Further, if said anisotropic medium unit is the electrical anisotropy medium, then the stealthy device of the said optical band of the utility model is used for stealthy to the light of TM (magnetic direction is perpendicular to the xsect of anisotropic medium unit) polarization; If said anisotropic medium unit is the magnetic anisotropy medium, then the stealthy device of the said optical band of the utility model is used for stealthy to the light of TE (direction of an electric field is perpendicular to the xsect of anisotropic medium unit) polarization; If said anisotropic medium unit is when being electrical anisotropy medium and magnetic anisotropy medium simultaneously, the stealthy device of then said optical band is used for stealthy to the light of complete polarization direction.
Further, the said anisotropic medium of the utility model unit has birefraction.
Further, the optical axis direction of the said anisotropic medium of the utility model unit is according to the refractive index n of its used birefraction material for ordinary light
oRefractive index n with extraordinary ray
eConfirm, work as n
o＞n
eThe time, the optical axis direction of said anisotropic medium unit is vertical with last base with the bottom of its xsect, works as n
o＜n
eThe time, the optical axis direction of anisotropic medium unit is parallel with last base with the bottom of its xsect.
Further, the stealthy device of the said optical band of the utility model is immersed in the transparent index-matching fluid, works as n
o＞n
eThe time, the refractive index of said index-matching fluid
And the ratio on the bottom of the xsect of anisotropic medium unit and last base
Work as n
o＜n
eThe time, the refractive index of said index-matching fluid
And the ratio on the bottom of the xsect of anisotropic medium unit and last base
Further, the angle of the waist of the xsect of the said anisotropic medium of the utility model unit and bottom is 60 °.
The beneficial effect of the utility model is:
The utility model is with the material of anisotropic medium as the stealthy device of structure optical band; When light passes through this device; Utilize the direction of propagation of anisotropic medium control light; Make light walk around the device center and be used to place the cavity of desiring by hidden substance, and the direction that outgoing radiation direction and former incident ray are propagated is identical, thereby play stealthy effect.The utility model surrounds the stealthy device of overall optical wave band, simple structure through the anisotropic medium unit; Do not need external energy, do not need higher technology yet, be easy to realize stable performance; And the stealthy device of the utility model optical band has the six direction stealth effect, is applicable to whole visible light wave range.
Description of drawings
Fig. 1 is the anisotropic medium cell schematics of the stealthy device of the utility model optical band;
Fig. 2 is the one-piece construction synoptic diagram of the stealthy device of the utility model optical band;
Fig. 3 is the light of the Theoretical Calculation trajectory diagram during through the stealthy device of the said optical band of the utility model;
Among the figure,
1. the upper bottom surface of anisotropic medium unit;
2. the bottom surface of anisotropic medium unit;
3. the side at waist of the xsect that is isosceles trapezoid of anisotropic medium unit place;
4. the side at another waist of the xsect that is isosceles trapezoid of anisotropic medium unit place;
5. the side at the bottom of the xsect that is isosceles trapezoid of anisotropic medium unit place;
6. the side at place, the last base of the xsect that is isosceles trapezoid of anisotropic medium unit;
7. the cavity of the stealthy device of optical band;
8. one of them anisotropic medium unit of the stealthy device of optical band;
9. one of them anisotropic medium unit of the stealthy device of optical band;
10. one of them anisotropic medium unit of the stealthy device of optical band;
A 3a. side of anisotropic medium unit 8;
4a. another side of anisotropic medium unit 8;
A 3b. side of anisotropic medium unit 9;
4b. another side of anisotropic medium unit 9;
A 3c. side of anisotropic medium unit 10;
4c. another side of anisotropic medium unit 10;
11. index-matching fluid region;
12. the interface of index-matching fluid and anisotropic medium unit;
13. the faying face of adjacent two anisotropic medium unit;
14. the faying face of adjacent two anisotropic medium unit;
15. the interface of anisotropic medium unit and index-matching fluid;
16a. the track of the light of a branch of incident wherein;
16b. the track after the refraction for the first time takes place in light;
16c. the track after the refraction for the second time takes place in light;
16d. the track after the refraction for the third time takes place in light;
16e. the track after the refraction takes place the 4th time in light.
Embodiment
Shown in Figure 1 for constituting the anisotropic medium unit of the stealthy device of the utility model optical band, this anisotropic medium unit is the cylinder that xsect is isosceles trapezoid.Shown in Fig. 2 is the one-piece construction synoptic diagram of the stealthy device of the utility model optical band; It is to be made up of six anisotropic medium unit, and promptly the side at each waist of the xsect that is isosceles trapezoid of each anisotropic medium unit place fits together with the side that corresponding waist with the xsect that is isosceles trapezoid of its adjacent anisotropic medium unit belongs to.Specifically; As shown in Figure 2; The side 4b of the side 3a of anisotropic medium unit 8 and adjacent anisotropic medium unit 9 is fit together; Another side 4a of anisotropic medium unit 8 and side 3c with its adjacent anisotropic medium unit 10 are fit together; By that analogy, thereby form that an adjacent side by six anisotropic medium unit is joined successively and the housing of the regular hexagon column structure that surrounds, this housing is the stealthy device of optical band of the utility model.Thereby; The side 5 at the place, bottom of the xsect that is isosceles trapezoid of all anisotropic medium unit surrounds the outer wall of the stealthy device of the utility model optical band; The side 6 at the place, last base of the xsect that is isosceles trapezoid of all anisotropic medium unit surrounds the inwall of the stealthy device of the utility model optical band, then is used for placing the object of desiring by stealthy by the cavity 7 that inwall surrounded.
As everyone knows, when light incides the interface of two different objects, can reflect, the direction of refraction is relevant, also relevant with the refractive index of two objects with the angle of light incident, specifically follows Snell's law.The refractive index of common objects is all identical on all directions; And anisotropic medium is because the difference of its electromagnetic parameter on all directions, so the refractive index of anisotropic medium is also inequality on all directions, its ray refraction track is different fully with the ray refraction track of common objects.Utilize this special nature of anisotropic medium, can be used for controlling the track of light refraction, reach the effect that common material cannot reach.
The stealthy device of the optical band of the utility model need be immersed in the stealthy device of optical band in the index-matching fluid in when work, thus the refraction angle when adjustment light passes the anisotropic medium unit that constitutes the stealthy device of optical band.The refractive index of index-matching fluid by the electromagnetic parameter of anisotropic medium through calculating.
The concrete electromagnetic parameter and the structural parameters of the stealthy device of the utility model optical band are provided with as follows: it is material that the anisotropic medium unit is selected the birefraction material for use; The xsect of anisotropic medium unit is an isosceles trapezoid, and the waist of isosceles trapezoid and the angle of bottom are 60 °.The birefraction material is n for the refractive index of ordinary light
o, the birefraction material is n for the refractive index of extraordinary ray
e, work as n
o＞n
eThe time, the optical axis direction of anisotropic medium unit is vertical with last base with the bottom of its xsect, and the refractive index of index-matching fluid is according to formula
Come to confirm the ratio on the bottom of the xsect of anisotropic medium unit and last base
Work as n
o＜n
eThe time, the optical axis direction of anisotropic medium unit is parallel with last base with the bottom of its xsect, and the refractive index of index-matching fluid is according to formula
Come to confirm the ratio on the bottom of the xsect of anisotropic medium unit and last base
Fig. 3 is the trajectory diagram (overlooking) during through the stealthy device of the utility model optical band for the light of Theoretical Calculation.Among the embodiment shown in Figure 3, the stealthy device of this hexagon optical band is immersed in the index-matching fluid; Wherein, it is raw material that the anisotropic medium unit is selected the birefringece crystal kalzit for use, and kalzit is the electrical anisotropy medium, and its refractive index is n
o=1.66, n
e=1.49, the optical axis direction of anisotropic medium unit is vertical with last base with the bottom of its xsect, and the refractive index of index-matching fluid is chosen for n
1=1.718, the bottom of the xsect of anisotropic medium unit is 6.67 with the ratio on last base.
Below like Fig. 3 to be the principle of work of the stealthy device of the bright the utility model optical band of as an exampleBSEMGVR takeN-PSVSEMOBJ.As shown in Figure 3, the stealthy device of the utility model optical band is in when work, the light 16a of a branch of TM (magnetic direction is perpendicular to the xsect of anisotropic medium unit) polarization from the left side level to the stealthy device direction incident of optical band.When light 16a incides the outer wall of the stealthy device of this optical band from index-matching fluid region 11 (following interface 12 with index-matching fluid and anisotropic medium unit is that example describes); According to Snell's law; The wave vector of light equates on the tangential direction of interface 12, so light 16a upwards is offset to the position at light 16b place.When light 16b process interface 13 (being the faying face of adjacent two anisotropic medium unit); Because the optical axis direction of each anisotropic medium unit is different; According to Snell's law; Light 16b is offset to the position at light 16c place once again downwards, and the direction of the light 16c after the skew just can be parallel with the incident direction of former light 16a but the displacement of a level is arranged.
When the light 16c next interface 14 of process (being the faying face of adjacent two anisotropic medium unit), according to Snell's law, light 16d squints downwards.When light 16d passed through interface 15 (interface of index-matching fluid and anisotropic medium unit) forward, according to Snell's law, light 16d reflected, and the direction of the light 16e after the refraction is identical with the direction of propagation of incident ray 16a.As shown in Figure 3, light 16a and other light pass through corresponding anisotropic medium unit successively along its light path, carry out four refractions, the cavity 7 in the middle of walking around thus, thus make invisible in the cavity 7 by hidden substance, play stealthy effect.
For the stealthy device of the utility model optical band; If the anisotropic medium unit is the electrical anisotropy medium, then the stealthy device of the utility model optical band is used for stealthy to the light of TM (magnetic direction is perpendicular to the xsect of anisotropic medium unit) polarization; If the anisotropic medium unit is the magnetic anisotropy medium, then the stealthy device of the utility model optical band is used for stealthy to the light of TE (direction of an electric field is perpendicular to the xsect of anisotropic medium unit) polarization; If the anisotropic medium unit is when possessing the characteristic of electrical anisotropy medium and magnetic anisotropy medium simultaneously, then the stealthy device of the utility model optical band is used for stealthy to the light of complete polarization direction.
Though only drawn among Fig. 3 light from the left side situation during glancing incidence; But the direction that light can parallel from the faying face with any adjacent two anisotropic medium unit is to the stealthy device incident of optical band; And has same effect; Therefore, embodiment as shown in Figure 3 can be implemented in effect stealthy on the six direction.
Claims (7)
1. stealthy device of hexagonal cylindrical optical band that utilizes anisotropic medium structure; It is characterized in that: it is the housing of the band cavity that surrounded by six transparent anisotropic medium unit; Said anisotropic medium unit is the cylinder that xsect is isosceles trapezoid, and the side at each waist place of the xsect of each anisotropic medium unit fits together with the side that corresponding waist with the xsect of its adjacent anisotropic medium unit belongs to; The side at the place, bottom of the xsect of all anisotropic medium unit surrounds the outer wall of said housing; The side at the place, last base of the xsect of all anisotropic medium unit surrounds the inwall of said housing, and the cavity of said housing is desired by stealthy object in order to placement.
2. a kind of stealthy device of hexagonal cylindrical optical band that utilizes the anisotropic medium structure according to claim 1, it is characterized in that: said anisotropic medium unit is electrical anisotropy medium and/or magnetic anisotropy medium.
3. a kind of stealthy device of hexagonal cylindrical optical band that utilizes the anisotropic medium structure according to claim 2; It is characterized in that: if said anisotropic medium unit is the electrical anisotropy medium, the stealthy device of then said optical band is used for stealthy to the light of TM polarization; If said anisotropic medium unit is the magnetic anisotropy medium, the stealthy device of then said optical band is used for stealthy to the light of TE polarization; If said anisotropic medium unit is when being electrical anisotropy medium and magnetic anisotropy medium simultaneously, the stealthy device of then said optical band is used for stealthy to the light of complete polarization direction.
4. a kind of stealthy device of hexagonal cylindrical optical band that utilizes the anisotropic medium structure according to claim 1, it is characterized in that: said anisotropic medium unit has birefraction.
5. a kind of stealthy device of hexagonal cylindrical optical band that utilizes the anisotropic medium structure according to claim 4 is characterized in that: work as n
o＞n
eThe time, the optical axis direction of said anisotropic medium unit is vertical with last base with the bottom of its xsect; Work as n
o＜n
eThe time, the optical axis direction of anisotropic medium unit is parallel with last base with the bottom of its xsect; Wherein, n
oRepresent the refractive index of said anisotropic medium unit, n for ordinary light
eRepresent the refractive index of said anisotropic medium unit for extraordinary ray.
6. a kind of stealthy device of hexagonal cylindrical optical band that utilizes the anisotropic medium structure according to claim 5, it is characterized in that: the stealthy device of said optical band is immersed in the transparent index-matching fluid, works as n
o＞n
eThe time, the refractive index of said index-matching fluid
And the ratio on the bottom of the xsect of anisotropic medium unit and last base
Work as n
o＜n
eThe time, the refractive index of said index-matching fluid
And the ratio on the bottom of the xsect of anisotropic medium unit and last base
7. according to each described a kind of stealthy device of hexagonal cylindrical optical band that utilizes the anisotropic medium structure in the claim 1 to 6, it is characterized in that: the waist of the xsect of said anisotropic medium unit and the angle of bottom are 60 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120549114 CN202614974U (en) | 2011-12-22 | 2011-12-22 | Hexagonal columnar optical band cloaking device constructed by using anisotropic medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120549114 CN202614974U (en) | 2011-12-22 | 2011-12-22 | Hexagonal columnar optical band cloaking device constructed by using anisotropic medium |
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| Publication Number | Publication Date |
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| CN202614974U true CN202614974U (en) | 2012-12-19 |
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|---|---|---|---|
| CN 201120549114 Expired - Fee Related CN202614974U (en) | 2011-12-22 | 2011-12-22 | Hexagonal columnar optical band cloaking device constructed by using anisotropic medium |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9588325B2 (en) | 2014-10-14 | 2017-03-07 | Huawei Technologies Co., Ltd. | Optical imaging processing system |
| CN108615445A (en) * | 2018-06-15 | 2018-10-02 | 陕西师范大学 | The open smooth concealed device of large scale and its stealthy scale adjustment method |
| CN108877436A (en) * | 2018-06-15 | 2018-11-23 | 陕西师范大学 | Open stealthy room and stealthy Extend Methods of Spatial Distribution |
| CN109283615A (en) * | 2018-10-18 | 2019-01-29 | 山东师范大学 | A kind of comprehensive stealthy shield based on fiber optic communication mechanism |
-
2011
- 2011-12-22 CN CN 201120549114 patent/CN202614974U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9588325B2 (en) | 2014-10-14 | 2017-03-07 | Huawei Technologies Co., Ltd. | Optical imaging processing system |
| CN108615445A (en) * | 2018-06-15 | 2018-10-02 | 陕西师范大学 | The open smooth concealed device of large scale and its stealthy scale adjustment method |
| CN108877436A (en) * | 2018-06-15 | 2018-11-23 | 陕西师范大学 | Open stealthy room and stealthy Extend Methods of Spatial Distribution |
| CN108615445B (en) * | 2018-06-15 | 2019-10-25 | 陕西师范大学 | The open smooth concealed device of large scale and its stealthy scale adjustment method |
| CN108877436B (en) * | 2018-06-15 | 2020-10-16 | 陕西师范大学 | Open type stealth house and stealth space expansion method |
| CN109283615A (en) * | 2018-10-18 | 2019-01-29 | 山东师范大学 | A kind of comprehensive stealthy shield based on fiber optic communication mechanism |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20141222 |
|
| EXPY | Termination of patent right or utility model |