CN208026895U - Terahertz reflects aplanatic lens - Google Patents
Terahertz reflects aplanatic lens Download PDFInfo
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- CN208026895U CN208026895U CN201820547079.3U CN201820547079U CN208026895U CN 208026895 U CN208026895 U CN 208026895U CN 201820547079 U CN201820547079 U CN 201820547079U CN 208026895 U CN208026895 U CN 208026895U
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- aplanatic lens
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Abstract
The utility model is related to a kind of Terahertzs to reflect aplanatic lens, including two surfaces, at least one surface is convex surface, another surface is plane or convex surface, and the shape at least one surface is aspherical shape.Terahertz wave beam focuses terahertz wave beam by the high quality that the shaping of the utility model refraction aplanatic lens can be obtained close to even up to diffraction limit, can also be collimated to terahertz wave beam with it, obtains plane THz wave；The imaging system that aplanatic lens is reflected using the Terahertz of the utility model compares traditional terahertz imaging system with better stability, and imaging resolution higher can meet the demands such as high-resolution terahertz imaging, Spectrum Analysis and biology sample detection.
Description
Technical field
The utility model is related to Terahertz Technology field, specifically a kind of Terahertz reflects aplanatic lens.
Background technology
THz wave is the electromagnetic wave band that frequency is 0.1~10 Terahertz range, is between microwave and infra-red radiation, together
When be also at macroscopic classical theories and the transition region of Bcs Theory.Therefore, THz wave has transient state, broadband property, phase
The peculiar properties such as dryness, low energy.Application of the THz wave in fields such as medical imaging, non-destructive testing and national defense industry in recent years
More extensively, Terahertz Technology has been proved to have bright prospects in more deep physical study and practical application.
Terahertz wave beam shaping device is the core in terahertz imaging system, for terahertz wave beam collimation and
It focuses, performance directly affects terahertz imaging quality.Terahertz wave band wavelength is much larger than visible wavelength, in imaging resolution
On there are intrinsic disadvantages, therefore the performance of terahertz wave beam shaping device seems more important.Terahertz imaging common at present
In system, terahertz wave beam shaping is realized by off-axis parabolic mirror, although can effectively eliminate aberration, its wave beam weight
Folded, the disadvantage of system stability difference is difficult to ignore.Commercial Terahertz refractor at present, nonreentrant surface shape is mostly spherical surface, this
So that spherical aberration influences seriously, to cause system imaging resolution ratio not high enough, it is difficult to meet high-resolution imaging, Spectrum Analysis and biology
The demand of the applications such as sample detection.
Utility model content
In view of the deficiencies of the prior art, the utility model provides a kind of Terahertz refraction aplanatic lens, can be to terahertz
Hereby wave beam carries out the collimation of high quality and focuses shaping, is suitable for terahertz imaging system, is ultimately imaged resolution ratio and system is steady
The qualitative terahertz imaging system far above using parabolic mirror or commercial Terahertz lens.
The utility model technical solution used for the above purpose is：
A kind of Terahertz refraction aplanatic lens, including two surfaces, at least one surface are convex surface, another surface
Shape for plane or convex surface, and at least one surface is aspherical shape.
The convex surface includes spherical surface, aspherical and Irregular Boundary Surface.
Described two surfaces all can serve as THz wave incidence surface.
The surface passes through polishing treatment.
The material of lens is polyethylene, high density polyethylene (HDPE), polytetrafluoroethylene (PTFE) or poly- 4- methylpentenes.
Edge thickness ranging from 0.5mm~2mm.
The utility model has the advantages that and advantage：
Spread out 1. terahertz wave beam can obtain close be even up to by the shaping of the utility model refraction aplanatic lens
The high quality of emitter-base bandgap grading limit focuses terahertz wave beam, can also be collimated to terahertz wave beam with it, obtains plane THz wave.
2. comparing traditional terahertz imaging system using the imaging system of the Terahertz refraction aplanatic lens of the utility model
There is system better stability, imaging resolution higher can meet high-resolution terahertz imaging, Spectrum Analysis and biological sample
The demands such as product examine survey.
Description of the drawings
Fig. 1 is the Terahertz refraction aplanatic lens schematic diagram that the utility model embodiment 1 provides；
Fig. 2 is the Terahertz refraction aplanatic lens collimation and focus schematic diagram that the utility model embodiment 2 provides；
Wherein 10 be in embodiment 1 Terahertz refraction aplanatic lens, 11 be embodiment 1 lens one surface, 12
For embodiment 1 cylindrical surface, 13 be another surface of 1 lens of embodiment；20 is saturating for the Terahertz refraction aplanasia in embodiment 2
Mirror collimates and focusing system, 21 and 22 reflect aplanatic lens for two Terahertzs.
Specific implementation mode
The utility model is described in further detail with reference to the accompanying drawings and embodiments.
Embodiment 1：
As shown in Figure 1, a kind of Terahertz refraction aplanatic lens 10 provided in this embodiment, surface 11 and surface 13
Shape can be respectively convex surface and plane, and can also be is convex surface.Cylindrical surface 12 is that Terahertz reflects aplanatic lens 10
Edge surface, edge thickness te.Terahertz reflects aplanatic lens 10 along 14 rotational symmetry of symmetry axis.
In the present embodiment, surface 11 is aspherical, and surface 13 is plane.The aspherical shadow that can eliminate spherical aberration
It rings.Surface 11 and 13 all can serve as the incidence surface or exit surface of THz wave.
In a particular application, surface 11 and surface 13 can be convex surface, but wherein at least one surface be it is aspherical, this
Sample could realize the purpose that spherical aberration is eliminated.
Terahertz reflects 10 edge thickness t of aplanatic lenseTypically larger than 1mm, in order to which Terahertz refraction aplanasia is saturating
Mirror 10 is loaded.But edge thickness teAlso it should not be too large, cross the decaying that conference increases THz wave, influence THz wave detection
Sensitivity.
The collimation of THz wave had both may be implemented in Terahertz refraction aplanatic lens 10, can also realize the poly- of THz wave
It is burnt.
The material that Terahertz reflects aplanatic lens 10 is polyethylene (PE), high density polyethylene (HDPE) (HDPE), polytetrafluoroethyl-ne
One kind in alkene (PTFE), poly- 4- methylpentenes (TPX).These types is all the common material of Terahertz refractor, and advantage exists
In cheap, easy to process, material physical chemistry stability is good, is absorbed to THz wave smaller.
After Terahertz reflects aplanatic lens 10 by numerically controlled lathe accurate modeling, automatic cutting is processed to be formed.To ensure
THz wave collimation focusing shaping effect in practical application, it is also necessary to be polished by surface.The surface essence of usual micron level
Degree can meet application demand.
In a particular application, Terahertz refraction aplanatic lens 10 can also be molded by pressing mold and the modes such as 3D printing add
Work is formed.
Terahertz wave beam can obtain close be even up to by refraction aplanatic lens shaping provided in this embodiment and spread out
The high quality of emitter-base bandgap grading limit focuses terahertz wave beam, can be used for the terahertz imaging research of sample to be tested.It is reflected using the Terahertz
The imaging system of aplanatic lens, which compares traditional terahertz imaging system, has better stability, and imaging resolution higher can
To meet the demands such as high-resolution terahertz imaging, Spectrum Analysis and biology sample detection.
Embodiment 2：
As shown in Fig. 2, a kind of Terahertz refraction aplanatic lens collimation provided in this embodiment and focusing system 20.In reality
On the basis of applying example 1, the shaping that aplanatic lens 21 and 22 realizes THz wave is reflected using two Terahertzs.Solid line arrow in figure
Head indicates THz wave transmission direction.
The THz wave of diverging is incident by the non-spherical surface of lens 21, and integer is parallel plane after being emitted by plane surface
THz wave, then it is incident through 22 plane surface of lens, non-spherical surface outgoing forms the high quality for being close to or up to diffraction limit
Terahertz focus beam.
In a particular application, sample to be tested can be placed on THz wave focussing plane.Sample to be tested transmission is anti-
The THz wave penetrated is received using collimating and focusing shaping by terahertz detector, and terahertz imaging detection may be implemented and answer
With.
Claims (6)
1. a kind of Terahertz reflects aplanatic lens, it is characterised in that：Including two surfaces, at least one surface is convex surface,
Another surface is plane or convex surface, and the shape at least one surface is aspherical shape.
2. Terahertz according to claim 1 reflects aplanatic lens, it is characterised in that：The convex surface includes spherical surface, non-
Spherical surface and Irregular Boundary Surface.
3. Terahertz according to claim 1 reflects aplanatic lens, it is characterised in that：Described two surfaces can be made
For THz wave incidence surface.
4. reflecting aplanatic lens according to claims 1 to 3 any one of them Terahertz, it is characterised in that：The surface is logical
Cross polishing treatment.
5. Terahertz according to claim 1 reflects aplanatic lens, it is characterised in that：The material of lens be polyethylene,
High density polyethylene (HDPE), polytetrafluoroethylene (PTFE) or poly- 4- methylpentenes.
6. Terahertz according to claim 1 reflects aplanatic lens, it is characterised in that：Edge thickness ranging from 0.5mm
~2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820547079.3U CN208026895U (en) | 2018-04-17 | 2018-04-17 | Terahertz reflects aplanatic lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820547079.3U CN208026895U (en) | 2018-04-17 | 2018-04-17 | Terahertz reflects aplanatic lens |
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| Publication Number | Publication Date |
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| CN208026895U true CN208026895U (en) | 2018-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201820547079.3U Active CN208026895U (en) | 2018-04-17 | 2018-04-17 | Terahertz reflects aplanatic lens |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389397A (en) * | 2018-04-17 | 2019-10-29 | 中国科学院沈阳自动化研究所 | A kind of Terahertz refraction aplanatic lens |
| CN114527524A (en) * | 2022-02-28 | 2022-05-24 | 中国科学院沈阳自动化研究所 | Terahertz edge expanding lens with edge expanding structure |
-
2018
- 2018-04-17 CN CN201820547079.3U patent/CN208026895U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110389397A (en) * | 2018-04-17 | 2019-10-29 | 中国科学院沈阳自动化研究所 | A kind of Terahertz refraction aplanatic lens |
| CN114527524A (en) * | 2022-02-28 | 2022-05-24 | 中国科学院沈阳自动化研究所 | Terahertz edge expanding lens with edge expanding structure |
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