CN206114935U - Electromagnetic wave collimating element and subassembly - Google Patents
Electromagnetic wave collimating element and subassembly Download PDFInfo
- Publication number
- CN206114935U CN206114935U CN201621171307.9U CN201621171307U CN206114935U CN 206114935 U CN206114935 U CN 206114935U CN 201621171307 U CN201621171307 U CN 201621171307U CN 206114935 U CN206114935 U CN 206114935U
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- electromagnetic wave
- wave
- source
- metal mirror
- collimating element
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Abstract
The utility model provides an electromagnetic wave collimating element and subassembly. This electromagnetic wave collimating element includes the metal plane of reflection, the metal plane of reflection is used for carrying out the collimation reflection with the electromagnetic wave of wave source transmission, the curved surface that the angle formed is predetermine for predetermineeing the curve around its symmetry axis rotation to the metal plane of reflection, it does to predetermine curved expression formula: Y2=2cx+c2, the opening radius r and the collimation reflection back of metal plane of reflection 2 theta of the electromagnetic angle of divergence satisfy: (Imgfile='DDA0001141484970000011. TIF'wi='478'he='119' /) wherein, c is the constant, the wave source is located on the symmetry axis. The utility model provides an electromagnetic wave collimating element not only can carry out the reflection of low -loss collimation to the electromagnetic wave, can also design the opening radius of metal plane of reflection according to the electromagnetic angle of divergence after the collimation reflection for but electromagnetic wave collimation angle scope is adjustable, brings very big convenience for the actual production application.
Description
Technical field
This utility model is related to collimating element technical field, more particularly to a kind of electromagnetic wave collimating element and component.
Background technology
Electromagnetic wave is shear wave, and it can be applied in fields such as detection, positioning, communications.Terahertz wave band is electromagnetic wave application
In a more important wave band.Typically in terahertz wave band application, it is often necessary to which THz wave is collimated.It is right at present
The device that THz wave is collimated mainly includes lens and off axis paraboloidal mirror.However, two kinds of collimating elements can only be to diverging
THz wave of the angle in the range of positive and negative 2arctan (rf) is collimated, wherein, r is the half of lens or off axis paraboloidal mirror
High level, f is wave source and lens or the distance of off axis paraboloidal mirror.The collimation angle scope very little of above two collimating element, receives
To the impact of lens and off axis paraboloidal mirror size；And when being collimated to THz wave using lens, lens can be to too
Hertz wave produces larger loss, wherein, these losses mainly include：It is saturating that THz wave is produced when propagating in lens medium
Penetrate the reflection loss that loss and THz wave are produced in reflextion from lens surface.
Therefore, it is necessary to a kind of electromagnetic wave collimating element and component are provided, to solve above-mentioned technical problem.
Utility model content
This utility model embodiment provides a kind of electromagnetic wave collimating element and component；Collimation angle in solve prior art
The technical problem such as scope is little.
This utility model provides a kind of electromagnetic wave collimating element, and it includes metal mirror, and the metal mirror is used for
The electromagnetic wave that wave source is launched is carried out into collimated reflected；The metal mirror is pre-programmed curve around its axis of symmetry rotation predetermined angle
Curved surface, the expression formula of the pre-programmed curve is:y2=2cx+c2；Opening radius r of the metal mirror are anti-with collimation
The θ of the angle of divergence 2 of the electromagnetic wave after penetrating meets：Wherein, c is constant, and the wave source is located at institute
State on axis of symmetry.
In electromagnetic wave collimating element described in the utility model, the constant c is more than the electromagnetic wavelength, described to open
The electromagnetic wavelengths of the port radius r more than 5 times.
In electromagnetic wave collimating element described in the utility model, the span of the predetermined angle is more than 0 ° and little
In equal to 180 °.
In electromagnetic wave collimating element described in the utility model, the metal mirror includes：Golden metal mirror, silver
Metal mirror, copper metal reflecting surface and/or aluminum metal reflecting surface.
This utility model also provides a kind of electromagnetic wave collimator assembly, and it includes：Wave source and electromagnetic wave collimating element, the ripple
Source is used to launch electromagnetic wave to the electromagnetic wave collimating element；The electromagnetic wave collimating element includes metal mirror, the gold
Category reflecting surface is used to for the electromagnetic wave that the wave source is launched to carry out collimated reflected, and the metal mirror is that pre-programmed curve is right around its
Axle is claimed to rotate the curved surface of predetermined angle, the expression formula of the pre-programmed curve is:y2=2cx+c2, the metal mirror
The θ of the angle of divergence 2 of the electromagnetic wave after opening radius r and collimated reflected meets：Wherein, c is normal
Number, the wave source is located on the axis of symmetry.
In electromagnetic wave collimator assembly described in the utility model, the constant c is more than the electromagnetic wavelength, described to open
The electromagnetic wavelengths of the port radius r more than 5 times.
In electromagnetic wave collimator assembly described in the utility model, the span of the predetermined angle is more than 0 ° and little
In equal to 180 °.
In electromagnetic wave collimator assembly described in the utility model, the metal mirror includes：Golden metal mirror, silver
Metal mirror, copper metal reflecting surface and/or aluminum metal reflecting surface.
In electromagnetic wave collimator assembly described in the utility model, the wave source includes terahertz wave band wave source, microwave ripple
Duan Boyuan or light-wave band wave source.
In electromagnetic wave collimator assembly described in the utility model, the wave source is point source.
This utility model provides a kind of electromagnetic wave collimating element and component.Metal mirror in the electromagnetic wave collimating element
For the curved surface that pre-programmed curve rotates predetermined angle around its axis of symmetry, the expression formula of the pre-programmed curve is:y2=2cx+c2；Gold
The θ of the angle of divergence 2 of the electromagnetic wave after opening radius r and collimated reflected of category reflecting surface meets：This reality
With the electromagnetic wave collimating element in new can not only low-loss collimated reflected be carried out to electromagnetic wave, can be with anti-according to collimation
The angle of divergence of the electromagnetic wave after penetrating is designing the opening radius of metal mirror so that electromagnetic wave can collimation angle scope it is adjustable,
Give bringing great convenience property of production application.
Description of the drawings
Fig. 1 is the position relationship schematic diagram of pre-programmed curve and wave source in this utility model preferred embodiment；
Fig. 2 is the structural representation of metal mirror in this utility model preferred embodiment；
Fig. 3 is when electromagnetic wave is located on the left of y-coordinate axle with metal mirror intersection point in this utility model preferred embodiment
Light path schematic diagram；
Fig. 4 is when electromagnetic wave is located on the right side of y-coordinate axle with metal mirror intersection point in this utility model preferred embodiment
Light path schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawing in this utility model embodiment, the technical scheme in this utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of this utility model, rather than the reality of whole
Apply example.Based on the embodiment in this utility model, those skilled in the art are obtained under the premise of creative work is not made
Every other embodiment, belong to this utility model protection scope.
Refer to Fig. 1 and Fig. 2, Fig. 1 is that pre-programmed curve shows with the position relationship of wave source in this utility model preferred embodiment
It is intended to；Fig. 2 is the structural representation of metal mirror in this utility model preferred embodiment.Electromagnetic wave in this preferred embodiment
Collimating element includes metal mirror 11.Metal mirror 11 is pre-programmed curve 10 around its axis of symmetry rotation predetermined angle
Curved surface, the expression formula of pre-programmed curve 10 is:y2=2cx+c2, easily learnt by the expression formula of pre-programmed curve 10, pre-programmed curve 10
Axis of symmetry is x coordinate axle.
In the preferred embodiment, predetermined angle value is 180 °, and such pre-programmed curve 10 rotates 180 ° around its axis of symmetry
The structural representation of the metal mirror 11 shown in Fig. 2 can be obtained.Certainly, in other embodiments, predetermined angle can also be
Arbitrary value in the range of more than 0 ° and less than or equal to 180 °, the concrete value of predetermined angle can be set according to practical situations
Put, here is not particularly limited.
In the preferred embodiment, wave source 20 is located on the axis of symmetry of pre-programmed curve 10, i.e., on x coordinate axle.Wave source
20 send the electromagnetic wave of diverging to the metal mirror 11, and the metal mirror 11 carries out the electromagnetic wave of diverging to collimate instead
Penetrate.Because electromagnetic wave through metal mirror without the need for being collimated, therefore the electromagnetic wave collimating element in the present embodiment
Transmission loss will not be produced to electromagnetic wave.
Metal mirror 11 in order to reflectance of the metal mirror 11 to electromagnetic wave can be improved, in this preferred embodiment
For copper metal reflecting surface.In other preferred embodiments, metal mirror 11 can also be anti-using golden metal mirror, silver metal
The reflecting surface of other metal materials such as face and/or aluminum metal reflecting surface is penetrated, as long as there is higher reflectance to electromagnetic wave,
Here is not particularly limited.
In addition, the production method of metal mirror 11 can be formed using metal in-mould injection, it would however also be possible to employ in device
The modes such as surface spraying metal material make, as long as meeting the requirement of the metal mirror 11 in this preferred embodiment.
In the preferred embodiment, metal mirror 11 is one side closed, the device of another side opening, as shown in Figure 2.
In Fig. 2, the left side of wave source 20 is enclosed construction, and the right side of wave source 20 is hatch frame.According to opening radius r of metal mirror 11
The length of metal mirror 11 on the right side of wave source is set with the relation of the θ of the angle of divergence 2 of the electromagnetic wave after collimated reflected, wherein, metal
The θ of the angle of divergence 2 of the electromagnetic wave after opening radius r and collimated reflected of reflecting surface 11 meets：Its
In, c is constant.In order to reduce the impact of diffraction effect, constant c need to be more than electromagnetic wavelength, and opening radius r need to be more than 5 times
Electromagnetic wavelength.Here, electromagnetic wavelength is preferably the centre wavelength of wave source.
It should be noted that if wave source 20 to all the winds launches electromagnetic wave, i.e., wave source 20 is equivalent to preferable point source.By
In the metal mirror 11 positioned at the right side of wave source 20 be a hatch frame, therefore, from the hatch frame outgoing of metal mirror 11
Collimated reflected electromagnetic wave in, a part is the electromagnetic wave through the surface collimated reflected of metal mirror 11, a part be without
Cross the electromagnetic wave of the collimated reflected of metal mirror 11.Wherein without the collimated reflected of metal mirror 11 electromagnetic wave the angle of divergence
It is defined as the θ of the angle of divergence 2 of the electromagnetic wave after collimated reflected.From another interpretation, without the collimated reflected of metal mirror 11
Electromagnetic wave it can be appreciated that the electromagnetic wave of collimated reflected need not be carried out in the electromagnetic wave of the transmitting of wave source 20.
For example, in two dimensional surface, wave source 20 launches electromagnetic wave into 360 ° of angular ranges, but according to actual need
Ask, the electromagnetic wave in positive and negative 10 ° of angular ranges need not carry out collimated reflected, then can arrange the electromagnetic wave after collimated reflected
The θ of the angle of divergence 2 is equal to 20 °, so as to anti-opening radius r for releasing metal mirror 11.Thus can produce only positive and negative 10 °
Electromagnetic wave in angular range does not carry out collimated reflected, and other direction electromagnetic waves are collimated the metal mirror 11 of reflection.
Therefore, what the metal mirror 11 in the present embodiment can be according to actual demand regulation electromagnetic wave can collimation angle scope.
The accuracy and feasibility of the expression formula of pre-programmed curve, is presented below the table in order to illustrate this preferred embodiment
Up to the derivation of formula.
Derive for convenience and calculate, the wave source 20 in this preferred embodiment is placed on the position of x=0, it is to be understood that
Wave source 20 can be not limited to the position of x=0 in the optional position of x coordinate axle.
Fig. 3 is refer to, Fig. 3 is that electromagnetic wave is located at y-coordinate with metal mirror intersection point in this utility model preferred embodiment
Light path schematic diagram during axle left side.Incident electromagnetic wave 21 is α, collimated reflected electromagnetic wave 22 and normal 23 with the angle of y-coordinate axle
Angle be β, collimated reflected electromagnetic wave 22 is γ with the angle of the tangent line 24 of metal mirror 11.In the preferred embodiment,
Collimated reflected electromagnetic wave 22 is parallel to x coordinate axle outgoing.
From geometric triangulation relation：
Both the above equation is solved can be obtained：
Can be obtained with the relation of coordinate according to angle：
Wherein x, y are respectively the abscissa and vertical coordinate of light and minute surface point of intersection,For point of intersection metal mirror 11
Slope.
WillY '=tan γ are expressed as, abbreviation will be carried out to y '=tan γ below：
Thus, y '=last abbreviations of tan γ into：
Fig. 4 is refer to, Fig. 4 is that electromagnetic wave is located at y-coordinate with metal mirror intersection point in this utility model preferred embodiment
Light path schematic diagram during axle right side.Incident electromagnetic wave 21 and the folder that the angle of y-coordinate axle is α, incident electromagnetic wave 21 and normal 23
Angle is β, and collimated reflected electromagnetic wave 22 is γ with the angle of the tangent line 24 of metal mirror 11.In the preferred embodiment, collimate
Reflection electromagnetic wave 22 is parallel to x coordinate axle outgoing.
Can be obtained by geometric triangulation relation：
Abbreviation is carried out to two formulas above to obtain：
WillY '=tan γ are expressed as, abbreviation will be carried out to y '=tan γ below：
Thus, y '=last abbreviations of tan γ into：
In summary, no matter incident electromagnetic wave 21 intersects at y-coordinate axle left side or right side with metal mirror 11, finally
What the expression formula of y '=tan γ abbreviations was just as, that is, it is
Using the relation abbreviation between trigonometric functionEquation, process is as follows：
Following equation group is obtained to the derivation of above formula both sides：
I.e.And due toWith reference to two sides
Journey is readily available：
Equation is carried out solving can be obtained：
γdα(cosα+cos2α-sinαcosα+sinα+sinαcosα+sin2α)
=d γ (cos α+cos2α+sinαcosα-sinα-sinαcosα+sin2α)
The equation with regard to γ is finally obtained,
γ=(1+sin α+cos α) d α=(1+cos α-sin α) d γ
The equation of γ will be analyzed below：
WhenWhen, can be obtained by deriving,
And becauseAnd γ sin α=x, so can abbreviation be further：
y2=2cx+c2
WhenWhen, the equation of γ can abbreviation be：
And becauseAnd γ sin α=x, y can be obtained2=2cx+c2。
In summary, no matterWithMagnitude relationship how, do not affect y2=2cx+c2Expression formula.
In the preferred embodiment, the metal mirror in electromagnetic wave collimating element is pre-programmed curve around its axis of symmetry rotation
The curved surface of predetermined angle, the expression formula of the pre-programmed curve is:y2=2cx+c2；Opening radius r of metal mirror and collimation
The θ of the angle of divergence 2 of the electromagnetic wave after reflection meets：Electromagnetic wave collimating element in this utility model
Can not only low-loss collimated reflected be carried out to electromagnetic wave, can be being set according to the angle of divergence of the electromagnetic wave after collimated reflected
Meter metal mirror opening radius so that electromagnetic wave can collimation angle scope it is adjustable, bring greatly to production application
Convenience.
This utility model preferred embodiment also provides a kind of electromagnetic wave collimator assembly, and it includes wave source and electromagnetic wave collimation unit
Part.Wave source is used to launch electromagnetic wave to electromagnetic wave collimating element.In the preferred embodiment, wave source is point source, and wave source is for too
Hertz wave band wave source, certainly, in other embodiments, wave source can also be microwave band wave source, light-wave band wave source etc., here
It is not particularly limited.
Electromagnetic wave collimating element includes metal mirror, and metal mirror is used to be collimated the electromagnetic wave that wave source is launched
Reflection.Metal mirror is the curved surface that pre-programmed curve rotates predetermined angle around its axis of symmetry, and the expression formula of pre-programmed curve is:
y2=2cx+c2, the θ of the angle of divergence 2 satisfactions of the electromagnetic wave after opening radius r and collimated reflected of metal mirror：Wherein, c is constant, and wave source is located on axis of symmetry.
Due to having explained to electromagnetic wave collimating element before description, for the terseness of description,
Will not be described here.
Electromagnetic wave collimator assembly in this preferred embodiment, because it adopts the electromagnetic wave collimation that this utility model is provided first
Part so that the electromagnetic wave of diverging can be converted to electromagnetic wave collimator assembly the electromagnetic wave of collimation, while can be anti-according to collimation
The angle of divergence of the electromagnetic wave after penetrating designs the opening radius of metallic mirror, realizes that electromagnetic wave can collimation angle range-controllable.
In sum, although this utility model is disclosed above with preferred embodiment, but above preferred embodiment is not used
To limit this utility model, one of ordinary skill in the art in without departing from spirit and scope of the present utility model, can make
Various changes are defined with retouching, therefore protection domain of the present utility model by the scope that claim is defined.
Claims (10)
1. a kind of electromagnetic wave collimating element, it is characterised in that including metal mirror, the metal mirror is used to send out in wave source
The electromagnetic wave penetrated carries out collimated reflected；The metal mirror is the song that pre-programmed curve rotates predetermined angle around its axis of symmetry
Face, the expression formula of the pre-programmed curve is:y2=2cx+c2；Institute after opening radius r and collimated reflected of the metal mirror
The θ of the angle of divergence 2 for stating electromagnetic wave meets：Wherein, c is constant, and the wave source is located at the axis of symmetry
On.
2. electromagnetic wave collimating element according to claim 1, it is characterised in that the constant c is more than the electromagnetic wave ripple
It is long, the electromagnetic wavelength of opening radius r more than 5 times.
3. electromagnetic wave collimating element according to claim 2, it is characterised in that the span of the predetermined angle is big
In 0 ° and less than or equal to 180 °.
4. electromagnetic wave collimating element according to claim 1, it is characterised in that the metal mirror includes：Metal
Reflecting surface, silver metal reflecting surface, copper metal reflecting surface and/or aluminum metal reflecting surface.
5. a kind of electromagnetic wave collimator assembly, it is characterised in that include：Wave source and electromagnetic wave collimating element, the wave source be used for
The electromagnetic wave collimating element launches electromagnetic wave；The electromagnetic wave collimating element includes metal mirror, the metal mirror
For the electromagnetic wave that the wave source is launched to be carried out into collimated reflected, the metal mirror is pre-programmed curve around its axis of symmetry rotation
The curved surface of predetermined angle, the expression formula of the pre-programmed curve is:y2=2cx+c2, opening radius r of the metal mirror
Meet with the θ of the angle of divergence 2 of the electromagnetic wave after collimated reflected：Wherein, c is constant, the ripple
Source is located on the axis of symmetry.
6. electromagnetic wave collimator assembly according to claim 5, it is characterised in that the constant c is more than the electromagnetic wave ripple
It is long, the electromagnetic wavelength of opening radius r more than 5 times.
7. electromagnetic wave collimator assembly according to claim 6, it is characterised in that the span of the predetermined angle is big
In 0 ° and less than or equal to 180 °.
8. electromagnetic wave collimator assembly according to claim 5, it is characterised in that the metal mirror includes：Metal
Reflecting surface, silver metal reflecting surface, copper metal reflecting surface and/or aluminum metal reflecting surface.
9. electromagnetic wave collimator assembly according to claim 5, it is characterised in that the wave source includes terahertz wave band ripple
Source, microwave band wave source or light-wave band wave source.
10. electromagnetic wave collimator assembly according to claim 5, it is characterised in that the wave source is point source.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621171307.9U CN206114935U (en) | 2016-10-26 | 2016-10-26 | Electromagnetic wave collimating element and subassembly |
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| CN201621171307.9U CN206114935U (en) | 2016-10-26 | 2016-10-26 | Electromagnetic wave collimating element and subassembly |
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| CN206114935U true CN206114935U (en) | 2017-04-19 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324735A (en) * | 2016-10-26 | 2017-01-11 | 深圳大学 | Electromagnetic wave collimating element and electromagnetic wave collimating component |
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2016
- 2016-10-26 CN CN201621171307.9U patent/CN206114935U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324735A (en) * | 2016-10-26 | 2017-01-11 | 深圳大学 | Electromagnetic wave collimating element and electromagnetic wave collimating component |
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