CN209514200U - The adjustable optical trap of optical pressure forms device - Google Patents
The adjustable optical trap of optical pressure forms device Download PDFInfo
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- CN209514200U CN209514200U CN201822242494.0U CN201822242494U CN209514200U CN 209514200 U CN209514200 U CN 209514200U CN 201822242494 U CN201822242494 U CN 201822242494U CN 209514200 U CN209514200 U CN 209514200U
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- modulator
- splitter
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Abstract
The utility model discloses a kind of adjustable optical traps of optical pressure to form device, including laser, optics collimator, optical beam-splitter, optical modulator module and the focusing objective len set gradually according to optical path direction, the optical modulator module includes spatial light modulator and gradual change light intensity attenuation piece, the spatial light modulator receives the light reflected by the optical beam-splitter and modulation, the light modulated by the spatial light modulator enter the focusing objective len after the gradual change light intensity attenuation piece.The utility model can realize that the hot spot phase distribution of optical trap, Strength Space are adjusted, and can not only be used to capture sample, but also can carry out the operation such as rotating to captured particle.
Description
Technical field
The utility model relates to a kind of optical traps to form device, more particularly to a kind of adjustable optical trap shape of optical pressure
At device.
Background technique
The light of existing optical tweezer technology, laser emitting amplifies after beam expanding lens, the incident high times magnification after beam splitter
The object lens of rate, object lens focus parallel hot spot, and a focal spot, i.e. photo potential trap are formed on object space focal plane.In entire optical path only
Spot size can be adjusted by beam expanding lens, and can not change light pressure size, potential well width, potential well spatial distribution.Traditional
Optical tweezer is a very accurate optical instrument, and after producer's design, precision assembly optical system, being integrally formed equipment is to eventually
End subscriber uses.In modern Application optics teaching, student can not effectively know from experience the formation of optical pressure, how use the power control of light potential well
Microcosmic particle processed only grabs microcosmic particle, discharges the two simple functions, and sometimes it is desirable that institute's trapped particle into
Row rotation.
Utility model content
For above-mentioned prior art defect, the task of the utility model is to provide a kind of adjustable optical trap shape of optical pressure
At device, realize that the hot spot phase distribution of optical trap, intensity can Space adjustments.
Technical solutions of the utility model are such that a kind of adjustable optical trap of optical pressure forms device, including according to light
Laser, optics collimator, optical beam-splitter, optical modulator module and the focusing objective len that road direction is set gradually, the light modulation
Module includes spatial light modulator and gradual change light intensity attenuation piece, and the spatial light modulator reception is reflected by the optical beam-splitter
Light and modulation, the light modulated by the spatial light modulator after the gradual change light intensity attenuation piece enter the conglomeration
Mirror.
Further, the spatial light modulator includes frame and several modulation units, and the modulation unit is with two-dimentional battle array
Column mode arranges and is fixed on the frame, and the modulation unit receives the control of control signal to being irradiated in the modulation unit table
The light wave in face carries out phase, polarization state, amplitude or intensity modulated.
Further, the light of the optical beam-splitter reflection is flat with the array of the two-dimensional array perpendicular to the modulation unit
The incident spatial light modulator in face.
Further, the gradual change light intensity attenuation piece is the different filter plate of each region absorption coefficient of light.
The utility model compared with prior art the advantages of be: due to using spatial light modulation technology, after object lens focus
Hot spot not only intensity controlled, distribution also can control, not only can be used to capture sample, but also can use generation
Vortex light, captured particle is carried out the operation such as to rotate.
Detailed description of the invention
Fig. 1 is that the adjustable optical trap of optical pressure forms apparatus structure schematic diagram.
Fig. 2 is spatial light modulator structure schematic diagram.
Fig. 3 is the light-field effects schematic diagram modulated by spatial light modulator.
Specific embodiment
Below with reference to embodiment, the utility model is described in further detail, but not as the restriction to the utility model.
Incorporated by reference to shown in Fig. 1 to Fig. 3, the adjustable optical trap of the optical pressure that the present embodiment is related to forms device, including according to
Laser 1, optics collimator 2, optical beam-splitter 3, optical modulator module 4 and the focusing objective len 5 that optical path direction is set gradually.Laser
The light that device 1 emits is by the way that after optics collimator 2, hot spot is amplified and collimates, and amplified light is incident on optical beam-splitter 3
On, it is reflected to down by optical modulator module 4, after the intensity of hot spot, phase space distribution are modulated at this time, by focusing objective len
The photo potential trap of various customization is formed after 5.Optical modulator module 4 includes a spatial light modulator 4a and gradual change light intensity attenuation piece
4b。
Optical modulator module 4 consists of two parts: spatial light modulator 4a and gradual change light intensity attenuation piece 4b.Space light modulation
Device 4 is containing there are many independent modulation unit 4a1, these independent pixel modulation unit 4a1 to be fixed on the frame of spatial light modulator
On 4a2, it is spatially arranged in two-dimensional array, each modulation unit 4a1 can independently received optical signalling or electricity letter
Number control, and change by this signal itself optical property, can be at any time to be modulated to the light wave of illumination on it
Between under the control of electric drive signal or other signals that changes, change the spatially amplitude of light distribution or intensity, phase, polarization
State.The light-field effects modulated by spatial light modulator 4a are as shown in Figure 3.
By light that optical beam-splitter 3 reflects with the array plane incidence space of the two-dimensional array perpendicular to modulation unit 4a1
Optical modulator 4a is incident on gradual change light intensity attenuation after passing through spatial light modulator 4a by the modulated light of spatial light modulator 4a
On piece 4b, the different zones of gradual change light intensity attenuation piece 4b have different absorption coefficients.Gradual change light intensity attenuation piece appearance is circle,
Attenuation distribution formula is divided into 10 parts of evenly sized regions at 36 degree of uniform fans, by entire light pass surface, every part of corresponding decaying 0%,
10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, 100%, the shaft of light intensity attenuation piece is led at center
It crosses and rotates adjustable different light intensity attenuation ratios.The position of gradual change light intensity attenuation piece 4b is adjusted by rotation, the intensity of light can
Further to adjust.
Claims (4)
1. a kind of adjustable optical trap of optical pressure forms device, which is characterized in that swash including what is set gradually according to optical path direction
Light device, optics collimator, optical beam-splitter, optical modulator module and focusing objective len, the optical modulator module include space light modulation
Device and gradual change light intensity attenuation piece, the spatial light modulator receives the light reflected by the optical beam-splitter and modulation, by described
The light of spatial light modulator modulation enters the focusing objective len after the gradual change light intensity attenuation piece.
2. the adjustable optical trap of optical pressure according to claim 1 forms device, which is characterized in that the space light modulation
Device includes frame and several modulation units, and the modulation unit arranges in a manner of two-dimensional array and be fixed on the frame, described
Modulation unit receive control signal control to be irradiated in the modulation unit surface light wave carry out phase, polarization state, amplitude or
Intensity modulated.
3. the adjustable optical trap of optical pressure according to claim 2 forms device, which is characterized in that the optical beam-splitter
The light of reflection is with the incident spatial light modulator of the array plane of the two-dimensional array perpendicular to the modulation unit.
4. the adjustable optical trap of optical pressure according to claim 1 forms device, which is characterized in that the gradual change light intensity declines
Subtracting piece is the different filter plate of each region absorption coefficient of light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822242494.0U CN209514200U (en) | 2018-12-29 | 2018-12-29 | The adjustable optical trap of optical pressure forms device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822242494.0U CN209514200U (en) | 2018-12-29 | 2018-12-29 | The adjustable optical trap of optical pressure forms device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209514200U true CN209514200U (en) | 2019-10-18 |
Family
ID=68198303
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822242494.0U Active CN209514200U (en) | 2018-12-29 | 2018-12-29 | The adjustable optical trap of optical pressure forms device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209514200U (en) |
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2018
- 2018-12-29 CN CN201822242494.0U patent/CN209514200U/en active Active
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