CN105842761B - Well word stacked THz wave optical focusing lens - Google Patents
Well word stacked THz wave optical focusing lens Download PDFInfo
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- CN105842761B CN105842761B CN201610407926.1A CN201610407926A CN105842761B CN 105842761 B CN105842761 B CN 105842761B CN 201610407926 A CN201610407926 A CN 201610407926A CN 105842761 B CN105842761 B CN 105842761B
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- becket
- thz wave
- focusing lens
- optical focusing
- wave optical
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0037—Arrays characterized by the distribution or form of lenses
- G02B3/0056—Arrays characterized by the distribution or form of lenses arranged along two different directions in a plane, e.g. honeycomb arrangement of lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B2003/0093—Simple or compound lenses characterised by the shape
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- Optics & Photonics (AREA)
- Aerials With Secondary Devices (AREA)
Abstract
A kind of well word stacked THz wave optical focusing lens are claimed in the present invention; it is related to optical element technology field; the THz wave optical focusing lens are transmission-type lens; transmission-type lens are engraved structure and have at least three " well " font beckets, wherein center alignment is close between " well " font becket and maximum caliber size is successively decreased along the direction of propagation of THz wave.The THz wave optical focusing lens realize focusing function using the stacked structure of hollow out, absorption loss is significantly reduced, improves intensity of the transmitted THz wave after lens, reduces the angle of divergence of the transmitted THz wave after lens, it is easy to implement, application easy to spread.
Description
Technical field
The present invention relates to optical element technology field, is specifically related to a kind of THz wave optical focusing lens.
Background technology
It is 0.1THz to 10THz that THz wave, which is in microwave to the wave band of far infrared transition, frequency range, and wavelength corresponds to model
Enclose for 3mm to 30 μm.Compared to the electromagnetic wave of other frequency ranges, THz wave show it is many itself the characteristics of and advantage, this
A little features and advantage can be applied to multiple subjects and field, be mainly shown as the following aspects：(1) Terahertz communicates, and utilizes
THz wave carries out battlefield secret communication as the antenna size of carrier wave compared with I, and THz wave to the penetrability of smog more
By force.(2) terahertz imaging, because terahertz emission is non-ionized, the concussion state for the molecule that only sets out, therefore when radiation is withdrawn
The morphosis of molecule will not change afterwards.Nevertheless, THz wave is mainly in the application also by a variety of limitations：
(1) understood according to the transmissivity of THz wave spectrum, when THz wave transmits in free space, run into hydrone and easily inhaled
Receive, so as to cause the significantly decay of Terahertz energy.(2) for THz wave in free space transmission, the angle of divergence of wave beam is very big,
Energy radiation is very scattered.Energy is very low when 2 points of the above causes the THz wave to transmit in an atmosphere and transmission range is very short, pole
The earth limits the application of THz wave.
Detected etc. in THz wave system in Terahertz radio communication, terahertz imaging, THz wave propagate and
Control is very crucial.Because THz wave absorbs seriously in an atmosphere, cause THz wave angle of divergence in free-space propagation
Greatly, propagation distance is short, therefore THz wave is focused particularly important.Generally use lens arrangement realizes the poly- of THz wave
Jiao, at present THz wave lens can be divided into the reflective and major class of transmission-type two, wherein reflective lens structure is complex, size
It is larger, it is unsuitable for applying in compact system, therefore the research to transmission-type lens more has a wide range of applications.Inventor
It has been investigated that transmission-type THz wave optical lens of the prior art is di-lens, dielectric structure is in itself to Terahertz
The absorbing phenomenon of ripple is fairly obvious, cause THz wave after such lens arrangement intensity significantly reduce, to THz wave
Application generate adverse effect.
The content of the invention
Present invention seek to address that in the prior art because THz wave optical lens is di-lens, dielectric structure is to terahertz
Hereby the absorbing phenomenon of ripple is fairly obvious, so as to cause THz wave after lens intensity significantly reduce, to THz wave
The problem of using adverse effect is generated.Innovatively propose a kind of well word stacked THz wave optical focusing lens.This hair
Bright technical scheme is as follows：
A kind of well word stacked THz wave optical focusing lens, including transmission-type lens, the transmission-type lens are to engrave
Space time opticses structure, transmission-type lens are made up of M becket, and M is the positive integer more than 3, and the becket is groined type, described
M becket stacks placement and caliber size successively decreases along the direction of propagation of THz wave, and the center of the becket is same
On straight line；It is bonded between the becket and forms transmission-type lens.
Further, the groined type structure of the becket is included around the square loop and square loop that are disposed therein
Eight rectangular block architectures composition.
Further, the number of the becket is 4, is followed successively by the first becket (1), the second metal from front to back
Ring, the 3rd becket and the 4th becket.
Further, the thickness of first becket, the second becket, the 3rd becket and the 4th becket is according to luxuriant and rich with fragrance
Nie Er-Kirchhoff's diffraction theory, which is drawn, is followed successively by 2.2mm, 1.5mm, 1.1mm, 1.0mm；The inner edge of the square loop of becket
The heart is away from being followed successively by 5.07mm, 8.78mm, 11.34mm, 13.42mm；The square outer apothem of becket is followed successively by 7.17mm,
10.14mm,12.42mm,14.34mm；, apothem refers to the center and the distance between side of square, inside and outside apothem pin
To be that square interior border and the distance of square outside, the rectangular block on the groined type ring are arrived in the center of square loop respectively
Length be followed successively by 8.04mm, 5.07mm, 2.79mm, 0.87mm；The width of rectangular block is followed successively by 2.10mm, 1.36mm,
1.08mm,0.93mm。
Further, the length of 8 rectangular block architectures, width, thickness difference are equal, and thickness is and square loop
Thickness it is equal.
Further, the material of the groined type becket is rigid material, including copper or gold or copper-gold alloy.
Further, the bonding between the groined type becket employs the organosilicon for having strong permeability to THz wave
Pressure sensitive adhesive SiPSA, main composition are raw-silastic continuously, MQ resins and organic solution.
Further, the groined type becket is cut using the technique of short-pulse laser cutting.
Advantages of the present invention and have the beneficial effect that：
Lens arrangement focusing performance when the 1st, testing 3,4,5,6 layers in simulation process, find to focus on effect during 4 Rotating fields
Fruit is relatively best；Why the length of 8 L-type structures, width, thickness difference are equal, and thickness of the thickness with square loop
It is equal, it is making and processing for the ease of structure；Be using short-pulse laser cutting because the simple process, quick, and
It can be good at the requirement for meeting machining accuracy.
Brief description of the drawings
Fig. 1 is that the present invention provides the THz wave optical focusing lens structural representation that preferred embodiment proposes；
Fig. 2 is Fig. 1 S11 parameters, focusing gain, half-power beam width simulation curve.
Embodiment
The example of the embodiment is shown in the drawings, wherein same or similar label represents identical or class from beginning to end
As element or with same or like function element.The embodiments described below with reference to the accompanying drawings are exemplary, only
For explaining the present invention, it is impossible to be interpreted as limitation of the present invention.
In the description of the embodiment of the present invention, it is to be understood that term " on ", " under ", "front", "rear", " interior ",
" outer ", " orientation or position relationship indicated by " center ", " alignment " etc. are based on orientation shown in the drawings or position relationship, be only for
It is easy to simplify the description embodiment of the present invention, rather than instruction or implies that signified device or element there must be specific side
Position, with specific azimuth configuration and operation, therefore it is not intended that limitation to the embodiment of the present invention.
, it is necessary to explanation, regulation unless otherwise specified or restriction, term in the description of the embodiment of the present invention
" connected ", " connection " should be interpreted broadly, for example, it may be mechanically connect, or two element internals connection or
It is joined directly together；Term " being close to ", " stacking " should be also interpreted broadly, below by for example bright specific embodiment party of the invention
Formula and advantage.
Example 1：It is THz wave optical focusing lens structural representation proposed by the present invention as shown in Figure 1, it uses 4
" well " font becket, stacks according to center alignment and places, and blend compounds are close to bonding and form engraved structure, reduce to greatest extent too
The transmission loss of Hertz wave.
" well " the font becket is made up of 1 square loop and 8 rectangular blocks, the length of 8 rectangular blocks, width,
Thickness difference is equal, and thickness is equal with the thickness of square loop.The first ring 1, the second ring the 2, the 3rd are followed successively by from front to back
Ring 3 and Fourth Ring 4, the thickness of described four " well " font rings are followed successively by 2.2mm, 1.5mm, 1.1mm, 1.0mm；Square loop
Interior apothem is followed successively by 5.07mm, 8.78mm, 11.34mm, 13.42mm；The outer apothem of square is followed successively by 7.17mm,
10.14mm,12.42mm,14.34mm；The length of rectangular block is followed successively by 8.04mm, 5.07mm on " well " the font ring,
2.79mm,0.87mm；Width is followed successively by 2.10mm, 1.36mm, 1.08mm, 0.93mm.The technique cut using short-pulse laser,
Technique is simple, it is easy to accomplish.
The material of " well " the font becket is copper or gold or alloy combination.The material is easy to obtain and is advantageous to protect
Demonstrate,prove the rigidity of lens arrangement.
Glue used in bonding between " well " the font becket is organic pressure-sensitive gel (SiPSA), main composition
For raw-silastic continuously, MQ resins and organic solution.The material is easy to obtain and has very strong permeability to THz wave.
Example 1 is tested using CST2015 electromagnetic simulation softwares, operating frequency range 320GHz-380GHz, also
It is THz wave the first atmospheric propagation window, center operating frequency 350GHz.
Fig. 2 (a) is the return loss plot of example 1, and return loss is more than in the range of 320GHz-380GHz as seen from the figure
20dB, at 340GHz, return loss reaches 52dB, at center operating frequency 350GHz, return loss 30dB.
Fig. 2 (b) is the frequency sweep gain of example 1, and as seen from the figure in 320GHz-380GHz frequency ranges, focusing gain is higher than
27.1dB, at center operating frequency, focusing gain 27.7dB, at 380GHz, size is maximum focusing gain
28.4dB.THz wave optical focusing lens proposed by the present invention have good focusing performance.
Fig. 2 (c) is the half-power main lobe width of example 1, as seen from the figure in 320GHz-380GHz, through proposed by the present invention
The half-power main lobe width excursion of THz wave after lens transmission is 4.3 ° to 5.4 °, in center operating frequency 350GHz
The half-power main lobe width at place is 4.3 °.THz wave optical focusing lens proposed by the present invention substantially reduce THz wave biography
The angle of divergence during broadcasting, there is good directionality.
In embodiments of the present invention, the tradition side for using polymeric material di-lens in the prior art is abandoned
Case, metal material is dexterously selected, the technique cut using short-pulse laser, and lens are made using gluing mode, obtaining
While obtaining good focusing performance and directionality, there is relatively low production cost and flexible structure composition mode again, to carry
The intensity transmission of high THz wave, the angle of divergence for reducing THz wave provide new approaches, be THz wave system development and
Using laying a good foundation.
In the present embodiment, Mei Gehuan, including the width of square loop and rectangular block are defined by X-direction, Mei Gehuan, bag
The length for including square loop and rectangular block is defined by Y direction；Using the positive direction of X-axis as the right side, using the positive direction of Z axis before.
3rd, it is as shown in Figure 3 for the simulation result of the number of plies.
3 (a) focusing gain when number of plies is respectively 3,4,5,6；3 (b) half-power beam width
(gain is the higher the better, illustrates the good condensing performance of lens, and THz wave intensity after lens improves more；Half
Powerbeam width is the smaller the better, illustrates the THz wave good directionality propagated by lens, and energy radiation is concentrated.)
The above embodiment is interpreted as being merely to illustrate the present invention rather than limited the scope of the invention.
After the content for having read the record of the present invention, technical staff can make various changes or modifications to the present invention, these equivalent changes
Change and modification equally falls into the scope of the claims in the present invention.
Claims (8)
1. a kind of well word stacked THz wave optical focusing lens, including transmission-type lens, it is characterised in that the transmission-type
Lens are hollow out optical texture, and transmission-type lens are made up of M becket, and M is the positive integer more than 3, and the becket is well
Font, the M becket stacks placement and caliber size successively decreases along the direction of propagation of THz wave, the center of the becket
On the same line；It is bonded between the becket and forms transmission-type lens.
2. well word stacked THz wave optical focusing lens according to claim 1, it is characterised in that the becket
Groined type structure include eight rectangular block architectures composition around the square loop and square loop that are disposed therein.
3. well word stacked THz wave optical focusing lens according to claim 1 or 2, it is characterised in that the gold
The number for belonging to ring is 4, is followed successively by the first becket (1), the second becket (2), the 3rd becket (3) and the 4th from front to back
Becket (4).
4. well word stacked THz wave optical focusing lens according to claim 3, it is characterised in that first gold medal
The thickness for belonging to ring (1), the second becket (2), the 3rd becket (3) and the 4th becket (4) spreads out according to Fresnel-kirchhoff
Penetrate theory and draw and be followed successively by 2.2mm, 1.5mm, 1.1mm, 1.0mm；The interior apothem of the square loop of becket is followed successively by
5.07mm,8.78mm,11.34mm,13.42mm；The square outer apothem of becket is followed successively by 7.17mm, 10.14mm,
12.42mm,14.34mm；Apothem refers to the distance between center and side of square, and inside and outside apothem is directed to just
Square interior border and the distance of square outside are arrived in the center of Q-RING respectively, the length of the rectangular block on the groined type ring according to
Secondary is 8.04mm, 5.07mm, 2.79mm, 0.87mm；The width of rectangular block is followed successively by 2.10mm, 1.36mm, 1.08mm,
0.93mm。
5. well word stacked THz wave optical focusing lens according to claim 2, it is characterised in that described eight
Length, width, the thickness difference of rectangular block architecture are equal, and thickness is equal with the thickness of square loop.
6. the well word stacked THz wave optical focusing lens according to claim 1 or 2 or 5, it is characterised in that described
The material of groined type becket is rigid material, including copper or gold or copper-gold alloy.
7. well word stacked THz wave optical focusing lens according to claim 1, it is characterised in that the groined type
Bonding between becket employs the organic pressure-sensitive gel SiPSA for having strong permeability to THz wave, and main composition is
Raw-silastic continuously, MQ resins and organic solution.
8. well word stacked THz wave optical focusing lens according to claim 1, it is characterised in that the groined type
Becket is cut using the technique of short-pulse laser cutting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610407926.1A CN105842761B (en) | 2016-06-08 | 2016-06-08 | Well word stacked THz wave optical focusing lens |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610407926.1A CN105842761B (en) | 2016-06-08 | 2016-06-08 | Well word stacked THz wave optical focusing lens |
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| Publication Number | Publication Date |
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| CN105842761A CN105842761A (en) | 2016-08-10 |
| CN105842761B true CN105842761B (en) | 2018-02-27 |
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| CN201610407926.1A Active CN105842761B (en) | 2016-06-08 | 2016-06-08 | Well word stacked THz wave optical focusing lens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106896429B (en) * | 2017-04-19 | 2018-05-18 | 中国计量大学 | A kind of Terahertz lens based on metal plate |
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| US6656373B1 (en) * | 1999-07-09 | 2003-12-02 | Wavefront Sciences, Inc. | Apodized micro-lenses for Hartmann wavefront sensing and method for fabricating desired profiles |
| CN100514093C (en) * | 2007-10-25 | 2009-07-15 | 南京大学 | Controllable electromagnetic wave transmittance structure based on sub-wave length metal double gratings and its preparation method |
| CN101281297B (en) * | 2008-03-13 | 2010-06-09 | 中国科学院光电技术研究所 | High permeation rate three-dimensional second wavelength metallic structure lens |
| US7888663B2 (en) * | 2008-04-16 | 2011-02-15 | Nanyang Technological University | Plasmonic structure lens and its application for online inspection |
| CN101276057A (en) * | 2008-04-22 | 2008-10-01 | 中国科学院光电技术研究所 | Lens for deeply modulating three-dimensional second wavelength metallic structure |
| JP6041349B2 (en) * | 2013-03-15 | 2016-12-07 | 国立大学法人茨城大学 | Metal plate lens |
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