CN208255572U - Image adjusting device - Google Patents
Image adjusting device Download PDFInfo
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- CN208255572U CN208255572U CN201820603333.7U CN201820603333U CN208255572U CN 208255572 U CN208255572 U CN 208255572U CN 201820603333 U CN201820603333 U CN 201820603333U CN 208255572 U CN208255572 U CN 208255572U
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Abstract
A kind of image adjusting device, comprising: polarizing film, for forming mutually perpendicular control light and detection light by rear by an imaging；Acousto-optic crsytal, the control light pass through detuning after acousto-optic crsytal；Holographic grating, it is detuning after control light by the holographic grating, the diffracted wave of ± 1 grade of output；± 1 grade of the diffracted wave is converted to left or right rotation circularly polarized light beam by the first quarter wave plate；The detection light is converted to the circularly polarized light beam opposite with the light beam optical activity of the first quarter wave plate conversion by the second quarter wave plate；Rubidium steam chamber, the light beam by the first quarter wave plate passes through rubidium steam chamber from one end, the light beam by the second quarter wave plate passes through rubidium steam chamber from the other end, light is controlled by applying, the indoor rubidium atom of gas forms immaterial convex lens or concavees lens, makes to detect the image on light by being reduced or amplifying after rubidium chamber.The creative immaterial lens made in atom gas of the device of the utility model generate true picture.
Description
Technical field
The utility model relates to optical imaging fields, further to a kind of image adjusting device.
Background technique
With the development of science and technology, the requirement to image such as biology imaging, medical imaging is higher and higher, optical imagery is controlled
Ability it is also more and more important for biology imaging, medical imaging etc., and mainly any print the reason of image fault
Paraxial diffraction can all occur when the image on light is propagated in free space.Accordingly, with respect to the resolution ratio for how improving image
It is an important issue.Have several technologies at present and propose solution, such as is a kind of based on electromagnetic induced transparency and phase
The technology of dry i on population imprison (CPT) is used to the figure that protection is imprinted in search coverage by the special space structure of pump field
Picture.And all these schemes and experiment, physical thought are all based on using the medium with spatial variations magnetic susceptibility.Due to
The spatial distribution of close coupling light beam makes medium transversely uneven distribution, and the absorption of medium and dispersion is caused to depend primarily on
The intensity and shape of close coupling light, imaging effect are unstable.
Utility model content
(1) technical problems to be solved
In view of this, the purpose of this utility model is to provide a kind of image adjusting device, more than at least partly solving
The technical problem.
(2) technical solution
One side according to the present utility model provides a kind of image adjusting device, comprising:
Polarizing film, for forming mutually perpendicular control light and detection light by rear by an imaging；
Acousto-optic crsytal, the control light pass through detuning after acousto-optic crsytal；
Holographic grating, it is detuning after control light by the holographic grating, the diffracted wave of ± 1 grade of output；
± 1 grade of the diffracted wave is converted to Left-hand circular polarization light beam by the first quarter wave plate；
The detection light is converted to right-hand circular polarization light beam by the second quarter wave plate；
Rubidium steam chamber, the Left-hand circular polarization light beam is from one end by rubidium steam chamber, and the right-hand circular polarization light beam is from another
One end controls light by rubidium steam chamber, by applying, and the indoor rubidium atom of gas forms immaterial convex lens or concavees lens, makes to detect
Image on light after rubidium chamber by being reduced or amplifying.
In further embodiment, image adjusting device further include: change the reflection group mirror of the detection light optical path direction,
It is parallel with the axis of the rubidium steam chamber for adjusting the detection light optical path direction.
In further embodiment, image adjusting device further includes half-wave plate and the first polarization beam apparatus, is set to described
It detects on light to the optical path of rubidium steam chamber, for controlling the power of the detection light.
In further embodiment, image adjusting device further includes the second polarization beam apparatus, is set to the control light extremely
In the optical path of rubidium steam chamber, for controlling the power of the control light.
In further embodiment, image adjusting device further includes aperture, is set to the reflection group mirror and holographic grating
Between.
In further embodiment, image adjusting device further includes camera, can receive the one of detection light positioned at rubidium steam chamber
Side is received through the control light image after rubidium steam chamber.
In further embodiment, the rubidium steam chamber has a central axis, first quarter wave plate and the 2nd 1/4 wave
Piece is respectively positioned on the central axis.
(3) beneficial effect
(1) method that the image modulation device of utility model passes through lens modulation image immaterial in rubidium atom air cavity.
(2) the creative proposition of the utility model generates the modulation methods of true picture by the immaterial lens in atom gas
Method.
(3) utility model is widely used, and can be used to improve the resolution ratio of image and be overcome the limitation of image diffraction, be
Realize the key of the full optical treatment of information.
Detailed description of the invention
Fig. 1 is what the utility model embodiment used85The energy diagram of Rb atom；
Fig. 2 is the image modulation device figure (PBS: polarization beam apparatus schematic diagram) that the utility model embodiment simplifies.
Fig. 3 is the result of the image in the different detuning situation modulateds of two-photon and single photon of the utility model embodiment
Figure (without control light beam in a and c, has control light beam in b and d.)
Specific embodiment
For the purpose of this utility model, technical solution and advantage is more clearly understood, below in conjunction with specific embodiment, and
Referring to attached drawing, the utility model is described in further detail.
Different from previous technology, the utility model does not use the control light beam with any special space structure, only
Use a kind of light beam with normal Gaussian mode.It is described in the utility model a kind of new non-by passing through in atom air cavity
The method of substance lens modulation image experimentally demonstrates a tool in the atomic system of the Λ type structure of large detuning
There is the strong control light beam of gaussian model that can be used to change the refractive index at look-in frequency.It by this method, can be easily
Zoom in or out optical imagery, but its shape is kept without significant change simultaneously.The utility model can be used to improve image
Resolution ratio and the limitation for overcoming image diffraction, these are all the key that realize the full optical treatment of information.
The purpose of this utility model is for existing based on the modulated optical for using the medium with spatial variations polarizability
The method of image provides one kind by atom without using the control light beam with any special space structure
The method of immaterial lens modulation image in gas chamber.Immaterial lens are former using the Λ type structure in large detuning in atomic air chamber
The strong control light beam with normal Gaussian mode in subsystem, control make along the refractive index in the radial direction of detection light beam
Obtaining the refractive index at beam center becomes bigger than the refractive index at beam edge place or small, to form convex lens in atomic air chamber
Mirror or concavees lens.In this way, the image on weak detection light beam can be zoomed in or out easily, and its shape energy
Enough while keeping without apparent variation.
Hereinafter, it will thus provide some embodiments are to be described in detail the embodiments of the present invention.The utility model
Advantage and effect will be more significant by the utility model following the description.Illustrate that appended attached drawing simplified and as example herein
Show use.Component count, shape and size shown in the drawings can modify according to actual conditions, and the configuration of component may
It is increasingly complex.Otherwise practice or application can also be carried out in the utility model, and without departing from defined in the utility model
Under conditions of spirit and scope, various change and adjustment can be carried out.
The utility model embodiment proposes a kind of image tune by lens modulation image immaterial in atomic air chamber
Engagement positions.The device is described by the D2 transition spectral line of Rb85, will be former using a control light beam and a detection light beam
What son was established as interacting with two lasers has ground state 5S1/2(F=3) and excitation state 5P3/2(F=4) two Zeemans
One three-level Λ system of sub- energy level.
As shown in Figure 1, | 1 > state, | 3 > state and | 2 > state respectively indicates ground state, metastable state and excitation state.Weak detection light action
In | 3 > arrive | 2 > transition on；Strong control light action in | 1 > arrive | 2 > transition on.ΔcBe control the frequency of light beam with | 1 > arrive |
2 > jump frequency between it is detuning；ΔpBe detect light beam frequency and | 3 > arrive | 2 > jump frequency between it is detuning.
In Δp=-1110MHz and ΔcIn the case where=- 1GHz, detecting the refractive index at beam center becomes than in light beam
The refractive index of edge is big, and the intracavitary rubidium atom of rubidium forms immaterial convex lens, leads to the focusing on detection light beam.
In Δp=1110MHz and ΔcIn the case where=1GHz, detecting the refractive index at beam center becomes than on light beam side
Refractive index at edge is small, and the rubidium atom in gas chamber forms immaterial concavees lens, leads to defocusing on detection light beam.
The image adjusting device of the utility model embodiment is as shown in Figure 2.As shown in Fig. 2, image adjusting device includes:
Polarizing film, for forming mutually perpendicular control light and detection light by rear by an imaging；
Acousto-optic crsytal, the control light pass through detuning after acousto-optic crsytal；
Holographic grating, it is detuning after control light by the holographic grating, the diffracted wave of ± 1 grade of output；
± 1 grade of the diffracted wave is converted to left or right rotation circularly polarized light beam by the first quarter wave plate；
It is inclined to be converted to the circle opposite with the light beam optical activity of the first quarter wave plate conversion by the second quarter wave plate for the detection light
Shake light beam；
Rubidium steam chamber, the light beam by the first quarter wave plate passes through rubidium steam chamber from one end, described to pass through the 2nd 1/4
The light beam of wave plate, by rubidium steam chamber, controls light by applying, the indoor rubidium atom of gas forms immaterial convex lens from the other end
Or concavees lens, make to detect the image on light by being reduced or amplifying after rubidium chamber.
As shown in Fig. 2, laser (imaging) is issued from stable outer lumen type diode laser (DL100, Toptica)
(Rb85The 5S of atom1/2(F=3) → 5P3/2(F=4) transition), wavelength 780nm, and it is divided into the orthogonal line of two beams
Polarised light (control light beam and detection light beam).Wherein two quarter wave plates (the first quarter wave plate and the 2nd 1/4 wave before gas chamber
Piece) will control light beam and detection light beam be converted into Left-hand circular polarization light beam and right-hand circular polarization light beam respectively.The function of two light beams
Rate is controlled by half-wave plate (HWP) and the first polarization beam apparatus (PBS) and the second polarization beam apparatus (PBS).
Detect light beam by fixed modulation frequency be 110MHz AOM transmission after, make its for control the detuning δ of light=±
110MHz passes through self-control second order holographic grating with ± 1 grade of diffracted probe beam.+ 1 grade of diffracted wave of holographic grating is input into gas
In room.85The operating temperature of Rb gas chamber is about 200 DEG C, length 5cm, includes pure isotope Rb 85.
By adjusting laser PZT deviate to obtain control light beam frequency and | 1 > arrive | 2 > jump frequency between mistake
Humorous Δc=± 1GHz.Simultaneously there is the control light beam of gaussian model to propagate by gas chamber to reduce noise.
Detection light beam is separated when leaving chamber by polarization beam apparatus, is monitored finally by common camera.Due to
ΔpThe relatively large detuning of=± 1110MHz, rubidium atom pair detection light beam do not absorb, and make to control light beam and detect that light beam is parallel leads to
Cross gas chamber.
In the utility model embodiment in certain control light beam and under detecting the power of light beam, lost by setting two-photon
Humorous δ and the detuning Δ of single photonpValue, after applying certain detuning control light beam, so that the indoor rubidium atom of gas forms non-object
Matter convex lens or concavees lens, so as to cause the image on detection light by being reduced or amplifying after rubidium chamber, but its shape is kept
Without significant change.The effective focal length of immaterial lens can control light beam and single photon by changing atomic density or Rabi frequency
It is detuning to adjust.
In the utility model embodiment, the power of control light beam is controlled by adjusting half-wave plate, also will affect the ruler of image
It is very little.Wherein, with the increase of control power, picture size becomes smaller；But when control light beam power it is larger when, picture size variation compared with
It is small.
When the detuning δ=110MHz of setting, ΔpWhen=1110MHz, quilt in the case where no control light as shown in Figure 3a
The effective diameter of the detection light beam of CCD record is 554 μm.As shown in Figure 3b, when applying control light, the image on light beam is detected
It significantly dissipates, effective diameter is 886 μm, corresponds to effective focal length 240mm.
Opposite, when the detuning δ=- 110MHz of setting, ΔpWhen=- 1110MHz, as shown in Figure 3c in no control light
In the case of by the effective diameter of detection light beam of CCD record be still 554 μm.If applying control light shown in Fig. 3 d, light is detected
Image on beam is to focus, and the effective diameter of image is 329 μm, and corresponding effective focal length is 220mm.
In addition, from Fig. 3 it will be clear that during light propagation passes through room, although detecting the shape of light beam
It is exaggerated or minimized, but its shape saves very well.
Tables of data shown in Fig. 3 is illustrated by passing through the feasible of the method for immaterial lens modulation image in atom air cavity
Property.Optical imagery can be made to zoom in or out easily by the utility model, while not change its shape.It can be used to mention
The resolution ratio of hi-vision and the limitation for overcoming image diffraction are the key that realize the full optical treatment of information.
Particular embodiments described above has carried out into one the purpose of this utility model, technical scheme and beneficial effects
Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, are not limited to this reality
With novel, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all include
It is within the protection scope of the utility model.
Claims (7)
1. a kind of image adjusting device, characterized by comprising:
Polarizing film, for forming mutually perpendicular control light and detection light by rear by an imaging；
Acousto-optic crsytal, the control light pass through detuning after acousto-optic crsytal；
Holographic grating, it is detuning after control light by the holographic grating, the diffracted wave of ± 1 grade of output；
± 1 grade of the diffracted wave is converted to left or right rotation circularly polarized light beam by the first quarter wave plate；
The detection light is converted to the circularly polarized light opposite with the light beam optical activity of the first quarter wave plate conversion by the second quarter wave plate
Beam；
Rubidium steam chamber, the light beam by the first quarter wave plate passes through rubidium steam chamber from one end, described to pass through the second quarter wave plate
Light beam from the other end by rubidium steam chamber, control light by applying, the indoor rubidium atom of gas forms immaterial convex lens or recessed
Lens make to detect the image on light by being reduced or amplifying after rubidium chamber.
2. image adjusting device according to claim 1, which is characterized in that further include: change the detection light optical path side
To reflection group mirror, it is parallel with the axis of the rubidium steam chamber for adjusting the detection light optical path direction.
3. image adjusting device according to claim 1, which is characterized in that further include half-wave plate and the first polarization beam splitting
Device is set on the detection light to the optical path of rubidium steam chamber, for controlling the power of the detection light.
4. image adjusting device according to claim 1, which is characterized in that further include the second polarization beam apparatus, be set to
On the control light to the optical path of rubidium steam chamber, for controlling the power of the control light.
5. image adjusting device according to claim 2, which is characterized in that further include aperture, be set to the reflection group
Between mirror and holographic grating.
6. image adjusting device according to claim 1, which is characterized in that further include camera, can be connect positioned at rubidium steam chamber
The side of detection light is received, is received through the control light image after rubidium steam chamber.
7. image adjusting device according to claim 1, which is characterized in that the rubidium steam chamber has a central axis, institute
It states the first quarter wave plate and the second quarter wave plate is respectively positioned on the central axis.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820603333.7U CN208255572U (en) | 2018-04-25 | 2018-04-25 | Image adjusting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820603333.7U CN208255572U (en) | 2018-04-25 | 2018-04-25 | Image adjusting device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398813A (en) * | 2018-04-25 | 2018-08-14 | 中国科学技术大学 | Image adjusting device and imaging method |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398813A (en) * | 2018-04-25 | 2018-08-14 | 中国科学技术大学 | Image adjusting device and imaging method |
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