CN209327694U - A kind of vortex beams generating device - Google Patents
A kind of vortex beams generating device Download PDFInfo
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- CN209327694U CN209327694U CN201920146668.5U CN201920146668U CN209327694U CN 209327694 U CN209327694 U CN 209327694U CN 201920146668 U CN201920146668 U CN 201920146668U CN 209327694 U CN209327694 U CN 209327694U
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- phase plate
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- spiral phase
- vortex beams
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Abstract
A kind of vortex beams generating device, including light-beam generator, the light beam of light-beam generator outgoing, which is incident in the polarizer, obtains linearly polarized light, and the linearly polarized light of polarizer outgoing is incident in spiral phase plate after collimator and extender device and diaphragm obtains vortex beams.A kind of vortex beams generating device provided by the embodiment of the utility model, design advantages of simple, diaphragm and collimator and extender device are equipped with, effectively improve the diffraction efficiency of single-stage vortex diffraction light, spatial light modulator is replaced with spiral phase plate, so that the vortex beams generating device effectively reduces cost on the basis of guaranteeing that topological charge number is adjustable.
Description
Technical field
The utility model relates to field of photoelectric technology more particularly to a kind of vortex beams generating devices.
Background technique
Vortex beams refer to a kind of with continuous helical shape Wave-front phase and with the special of determining photon trajectory angular momentum
Light beam.Light intensity at its helical phase center is zero, and the phase at center can not determine, feature the most general is its electric field
Expression formula contains phase factor exp (im θ), and wherein m is known as topological charge number.Due to vortex beams optics trapping, manipulate it is micro-
The application of small particles, super-resolution optical microscope and astronomy etc., so that people are more next to the research of vortex beams
More pay close attention to.It is used to generate at present relatively common in the method for vortex beams in laboratory and is efficiently using spatial light modulator
(Spatical Light Modulators, SLM), various spatial light modulators and the combination for calculating holography make this method exist
Become more convenient in terms of generating optical eddy.However, a use of main problem for calculating holography method being that there are multiorder diffractives.
Although the optical eddy of different topology lotus can be generated simultaneously, the diffraction efficiency of every level-one vortex diffraction light is all not high enough, and
Spatial light modulator structure is complicated, and the setting of support device is also costly.
Utility model content
The utility model provides a kind of vortex beams generating device, effectively improves the diffraction effect of single-stage vortex diffraction light
Rate effectively reduces cost on the basis of guaranteeing that topological charge number is adjustable, solves problems of the prior art.
Used technical solution is the utility model to solve above-mentioned technical problem:
A kind of vortex beams generating device, including light-beam generator, the light beam of light-beam generator outgoing, which is incident to, to be polarized
Linearly polarized light is obtained in device, the linearly polarized light of polarizer outgoing is incident in spiral phase plate after collimator and extender device and diaphragm
Obtain vortex beams；The spiral phase plate includes the sealing drum with cavity, which is transparent, in the cavity side
It is fixed with the first transparent spiral phase plate, the side of the close first spiral phase plate helicoid is full of medium in the cavity
Solution, the medium solution form the second spiral phase plate of liquid by spiral phase plate, first spiral phase plate and second
Spiral phase plate is complementary.
Preferably, which uses K9 glass.
Preferably, which includes pedestal, is equipped with lead screw and guide rail on the pedestal in parallel, slides and set on the guide rail
There is collimating mirror, which is fixedly mounted on the nut of the lead screw；It should be also fixed with beam expanding lens on/35, the expansion
Shu Jing is arranged close to diaphragm.
Preferably, which is He-Ne laser.
Preferably, which is equipped with inlet.
A kind of vortex beams generating device provided by the embodiment of the utility model, designs advantages of simple, and diaphragm and collimation expand
Beam device is equipped with, and effectively improves the diffraction efficiency of single-stage vortex diffraction light, replaces spatial light modulator with spiral phase plate,
So that the vortex beams generating device effectively reduces cost on the basis of guaranteeing that topological charge number is adjustable.
Detailed description of the invention
Fig. 1 is a kind of vortex beams generating device structural schematic diagram provided by the embodiment of the utility model.
In figure, 1, light-beam generator, 2, the polarizer, 3, collimator and extender device, 31, pedestal, 32, lead screw, 33, nut, 34, lead
Rail, 35, collimating mirror, 36, beam expanding lens, 4, diaphragm, 5, spiral phase plate, 51, sealing drum, the 52, first spiral phase plate, 53,
Two spiral phase plates, 54, inlet.
Specific embodiment
In order to clarify the technical characteristics of the invention, below by specific embodiment, and its attached drawing is combined, to this reality
It is described in detail with novel.
As shown in Figure 1, the utility model embodiment provides a kind of vortex beams generating device.The vortex beams fill
It sets including light-beam generator 1, the light beam of the light-beam generator 1 outgoing, which is incident in the polarizer 2, obtains linearly polarized light, the polarizer 2
The linearly polarized light of outgoing is incident in spiral phase plate 5 after collimator and extender device 3 and diaphragm 4 and obtains vortex beams.
The light-beam generator 1 is He-Ne laser.He-Ne laser is shaken equipped with helium-neon gas in electronics in quartz ampoule
Under the excitation of device, inelastic collision occurs, makes electron transition, releases infrared ray.
The collimator and extender device 3 includes pedestal 31, is equipped with lead screw 32 and guide rail 34 on the pedestal 31 in parallel, slides on the guide rail 34
Dynamic to be equipped with collimating mirror 35, which is fixedly mounted on the nut 33 of the lead screw 32；Also fixation is set on the pedestal 31
There is beam expanding lens 36, which is arranged close to diaphragm 4.
The laser beam that beam expanding lens 36 is used to issue laser expands, and the spot size of laser is become larger；Collimating mirror
35 for maintaining the collimation of the light beam between two optical elements, and collimating mirror 35 is arranged on the nut 33 of lead screw 32, so that work
Make personnel by adjusting screw 32, can accurately adjust the distance between collimating mirror 35 and beam expanding lens 36, collimating mirror 35 with expand
It is accurate to focus between mirror 36, and the precision of the vortex beams of the injection of spiral phase plate 5 can be improved.
The diaphragm 4 is used to control the effective area on the parallel beam incident to the spiral phase plate 5.
The spiral phase plate 5 includes the sealing drum 51 with cavity, which is transparent, in the cavity side
It is fixed with the first transparent spiral phase plate 52, is full of in the cavity close to the side of 52 helicoid of the first spiral phase plate
Medium solution, the medium solution form the second spiral phase plate 53 of liquid, first spiral phase plate by spiral phase plate 5
52 is complementary with the second spiral phase plate 53.
First spiral phase plate 52 uses K9 glass.K9 glass is a kind of optical glass, it is glittering and translucent, is very suitable to
For in optical application.
The sealing drum 51 is equipped with inlet 54.For replacing medium solution, different medium solution has different refractive index,
Staff can change the topological charge number of the optical eddy of the injection of spiral phase plate 5 by changing medium solution, therein
Relationship is:
Wherein: Δ nm=nx-ny, nxFor the refractive index of the first spiral limit plate, nyFor the refractive index of the second spiral limit plate,
M is the topological charge number of optical eddy；
Δ a=amax-amin, amaxFor the width in 52 thickness of the first spiral phase plate, aminFor the first spiral phase plate 52
The width of thinnest part；
λ is the wavelength of light wave.
Being coupled between optical beam generating device, the polarizer 2, collimator and extender device 3, diaphragm 4 and spiral phase plate 5 sets
It sets, light channel structure is simple, and it is easy to operate, on the basis of cost is greatly lowered, the setting of lead screw 32 in collimator and extender device 3,
Improve the precision that staff adjusts distance between collimating mirror 35 and beam expanding lens 36；The design of spiral phase plate 5, even more increases
Spiral phase plate 5 projects the use scope of vortex beams, by replacing medium solution, i.e., the ginseng of adjustable spiral phase plate 5
Number, flexibly control generates the topological charge number of optical eddy.
Above-mentioned specific embodiment cannot function as the limitation to scope of protection of the utility model, for the skill of the art
For art personnel, any alternate modification or transformation made to the utility model embodiment all fall within the guarantor of the utility model
It protects in range.
Place is not described in detail for the utility model, is the well-known technique of those skilled in the art of the present technique.
Claims (5)
1. a kind of vortex beams generating device, it is characterised in that: including light-beam generator, the light beam of the light-beam generator outgoing
It is incident in the polarizer and obtains linearly polarized light, the linearly polarized light of polarizer outgoing is incident to spiral shell after collimator and extender device and diaphragm
Vortex beams are obtained in rotation phase-plate；The spiral phase plate includes the sealing drum with cavity, the sealing drum be it is transparent,
Side in the cavity is fixed with the first transparent spiral phase plate, close first spiral phase plate in the cavity
The side of helicoid is full of medium solution, and the medium solution forms the second spiral phase plate of liquid by spiral phase plate,
First spiral phase plate is complementary with the second spiral phase plate.
2. a kind of vortex beams generating device according to claim 1, it is characterised in that: first spiral phase plate is adopted
With K9 glass.
3. a kind of vortex beams generating device according to claim 1, it is characterised in that: the collimator and extender device includes bottom
, lead screw and guide rail are equipped on the pedestal in parallel, sliding is equipped with collimating mirror on the guide rail, and the collimating mirror bottom is fixed to pacify
On the nut of the lead screw；Beam expanding lens is also fixed on the pedestal, the beam expanding lens is arranged close to diaphragm.
4. a kind of vortex beams generating device according to claim 1, it is characterised in that: the light-beam generator is He-Ne
Laser.
5. a kind of vortex beams generating device according to claim 1, it is characterised in that: the sealing drum is equipped with feed liquor
Mouthful.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920146668.5U CN209327694U (en) | 2019-01-28 | 2019-01-28 | A kind of vortex beams generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920146668.5U CN209327694U (en) | 2019-01-28 | 2019-01-28 | A kind of vortex beams generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209327694U true CN209327694U (en) | 2019-08-30 |
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ID=67731949
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920146668.5U Expired - Fee Related CN209327694U (en) | 2019-01-28 | 2019-01-28 | A kind of vortex beams generating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111370994A (en) * | 2020-03-18 | 2020-07-03 | 长春理工大学 | Vertical cavity surface emitting semiconductor laser with upper electrode and middle electrode pair distributed in angle |
| CN112125506A (en) * | 2020-09-23 | 2020-12-25 | 苏州大学 | Preparation method of spiral phase modulation sheet and method for generating vortex light beam by using spiral phase modulation sheet |
-
2019
- 2019-01-28 CN CN201920146668.5U patent/CN209327694U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111370994A (en) * | 2020-03-18 | 2020-07-03 | 长春理工大学 | Vertical cavity surface emitting semiconductor laser with upper electrode and middle electrode pair distributed in angle |
| CN112125506A (en) * | 2020-09-23 | 2020-12-25 | 苏州大学 | Preparation method of spiral phase modulation sheet and method for generating vortex light beam by using spiral phase modulation sheet |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190830 Termination date: 20200128 |