CN105467582B - A kind of Beam switching device and switching method - Google Patents
A kind of Beam switching device and switching method Download PDFInfo
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- CN105467582B CN105467582B CN201511018352.0A CN201511018352A CN105467582B CN 105467582 B CN105467582 B CN 105467582B CN 201511018352 A CN201511018352 A CN 201511018352A CN 105467582 B CN105467582 B CN 105467582B
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- light beam
- laser light
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/0816—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements
- G02B26/0833—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light by means of one or more reflecting elements the reflecting element being a micromechanical device, e.g. a MEMS mirror, DMD
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
- G02B27/285—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining comprising arrays of elements, e.g. microprisms
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a kind of Beam switching device and switching method, which includes the photoelectric device for being internally provided with the box body of cavity and being arranged in cavity, and photoelectric device includes：First laser device, second laser, DMD micro mirrors device, the first polarization splitting prism, the second polarization splitting prism, the first half-wave plate and the second half-wave plate.A kind of Beam switching device of the present invention and switching method, the switching of light beam are realized using DMD micro mirrors device, its is simple in structure, cost is low and switching efficiency is high.
Description
Technical field
The invention belongs to field of photoelectric technology, and in particular to a kind of Beam switching device and switching method.
Background technology
Two-photon fluorescence micro-imaging technique, can be to thicker biological group by the use of the femtosecond laser of near-infrared as light source
Knit and carry out biology microscope imaging, have the characteristics that imaging depth is big, light injury is small, spatial resolution and contrast are high, while again
Coordinate the light stimulus of another wavelength laser to test, can be used for the kinetic characteristic and molecule dynamic for studying protein in living cells.
However, the Beam switching device in existing fluorescence microscope is complicated, and switching efficiency is low.A kind of therefore structure
Simply, simple operation, the high Beam switching device of switching efficiency and switching method urgently propose.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention proposes a kind of Beam switching device and switching method, utilizes DMD micro mirrors
Device realizes the switching of light beam, its is simple in structure, cost is low and switching efficiency is high.
In order to achieve the above object, technical scheme is as follows：
A kind of Beam switching device, including it is internally provided with the box body of cavity and the photoelectric device being arranged in cavity, light
Electrical part includes：First laser device, for launching first laser light beam；Second laser, for launching second laser light beam；
DMD micro mirror devices, for realizing reflection and refraction to first laser light beam and second laser light beam；First polarization splitting prism, if
The side of DMD micro mirror devices is placed in, for realizing refraction and transmission to first laser light beam and/or second laser light beam；Second is inclined
Shake Amici prism, is arranged at the side of the first polarization splitting prism, and the first polarization splitting prism is arranged at DMD micro mirrors device and
Between two polarization splitting prisms, the second polarization splitting prism is used to realize folding to first laser light beam and/or second laser light beam
Penetrate and transmit；First half-wave plate, is arranged between the first polarization splitting prism and DMD micro mirror devices, for adjusting first laser light
The polarization angle of beam；Second half-wave plate, is arranged between the first polarization splitting prism and the second polarization splitting prism, for adjusting
The polarization angle of second laser light beam.
A kind of simple in structure its of Beam switching device of the present invention realizes first laser light beam and second using DMD micro mirrors device
The switching of laser beam, switching efficiency are high.
Based on the above technical solutions, following improvement can also be done：
As preferable scheme, Beam switching device further includes：3rd half-wave plate, the 3rd half-wave plate are arranged at first laser
Between device and the first polarization splitting prism, the polarization angle of the first laser light beam sent for adjusting first laser device so that
Can all it be reflected by the first laser light beam of the 3rd half-wave plate by the first polarization splitting prism.
Using the above preferred scheme, ensureing can be by all by the first polarization by the first laser light beam of the 3rd half-wave plate
Amici prism reflects.
As preferable scheme, Beam switching device further includes：4th half-wave plate, the 4th half-wave plate are arranged at second laser
Between device and the second polarization splitting prism, the polarization angle of the second laser light beam sent for adjusting second laser so that
Can all it be reflected by the second laser light beam of the 4th half-wave plate by the second polarization splitting prism.
Using the above preferred scheme, ensureing can be by all by the second polarization by the second laser light beam of the 4th half-wave plate
Amici prism reflects
As preferable scheme, Beam switching device further includes dichroscope, and dichroscope is used to that DMD micro mirror devices will to be passed through
Reflection and refraction first laser light beam with by DMD micro mirrors device reflect and reflect second laser light beam carry out conjunction beam couple.
Using the above preferred scheme, it is simple in structure, the conjunction beam coupling effect of first laser light beam and second laser light beam
It is good.
As preferable scheme, anti-dazzling screen is equipped with box body, cavity is divided into switching chamber and coupler by anti-dazzling screen, in shading
On piece is equipped with the first perforated hole and the second perforated hole, and the first perforated hole is used for first laser light beam and is incident upon coupler from switching chamber,
Second perforated hole is used for second laser light beam and is incident upon coupler from switching chamber.
Using the above preferred scheme, the veiling glare that anti-dazzling screen will effectively can produce in switching intracavitary, handoff procedure
Isolated, prevent it from entering coupler, ensure the light beam in coupler
As preferable scheme, first laser device, second laser, DMD micro mirrors device, the first polarization splitting prism, second
Polarization splitting prism, the first half-wave plate, the second half-wave plate, the 3rd half-wave plate and the 4th half-wave plate are arranged at switching intracavitary.
Using the above preferred scheme, switching chamber is used for realization the switching of light beam.
As preferable scheme, dichroscope is arranged in coupler.
Using the above preferred scheme, coupler is used for realization the coupling and injection of light beam.
A kind of light beam switching method, carries out light beam switching using Beam switching device, comprises the following steps：
S1 first laser devices launch first laser light beam, second laser transmitting first laser light beam；
S2 first lasers light beam and second laser light beam pass through the first polarization splitting prism and the second polarization spectro rib respectively
Mirror is reflected；
First laser light beams of the S3 after the refraction of the first polarization splitting prism is incident upon DMD micro mirror devices by the first half-wave plate
Reflecting part；
S4 judges whether the reflecting part of DMD micro mirror devices is reflective condition,
If reflective condition, then after former road reflection is carried out to first laser light beam, into S5,
If not reflective condition, then first laser light beam is not reflected；
First laser light beams of the S5 by the reflection of DMD micro mirrors device carries out polarization angle adjustment by the first half-wave plate so that
The first laser light beam is transmitted from the first polarization splitting prism and the second polarization splitting prism successively, is entered by the first perforated hole
Coupler；
Second laser light beams of the S6 after the refraction of the second polarization splitting prism carries out polarization angle by the second half-wave plate
Adjustment so that the second laser light beam is transmitted from the second polarization splitting prism, is incident upon the refraction part of DMD micro mirror devices；
S7 judges whether the refraction part of DMD micro mirror devices is refractive status,
If refractive status, then second laser light beam is reflected, the second laser light beam is passed through the second perforated hole
Into coupler,
If not refractive status, then second laser light beam is not reflected.
A kind of light beam switching method transition effect of the present invention is good, and switching efficiency is high.
As preferable scheme, step S1 further includes step in detail below：
S1.1 first laser devices launch first laser light beam, and first laser light beam carries out polarization angle by the 3rd half-wave plate
Adjustment；
S1.2 second lasers launch second laser light beam, and second laser light beam carries out polarization angle by the 4th half-wave plate
Adjustment.
Using the above preferred scheme, ensureing can be by all by the first polarization by the first laser light beam of the 3rd half-wave plate
Amici prism reflects, and ensures all to be reflected by the second polarization splitting prism by the second laser light beam of the 4th half-wave plate.
As preferable scheme, light beam switching method further includes：
S8 is into the first laser light beam in coupler and/or second laser light beam by entering optical fiber after dichroscope.
Using the above preferred scheme, ensure that light beam can be with efficient coupling or injection.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of Beam switching device provided in an embodiment of the present invention.
Wherein：1 first laser device, 2 second lasers, 3 DMD micro mirrors devices, 31 reflecting parts, 32 refraction parts, 4 first polarizations
Amici prism, 5 second polarization splitting prisms, 6 first half-wave plates, 7 second half-wave plates, 8 the 3rd half-wave plates, 9 the 4th half-wave plates, 10
Dichroscope, 11 anti-dazzling screens, 12 switching chambers, 13 couplers, 14 first perforated holes, 15 second perforated holes, 16 speculums, 17 couplings
Object lens.
Embodiment
The preferred embodiment that the invention will now be described in detail with reference to the accompanying drawings.
In order to reach the purpose of the present invention, in a kind of some of embodiments of Beam switching device and switching method,
As shown in Figure 1, a kind of Beam switching device, including be internally provided with the box body 1 of cavity and be arranged in cavity
Photoelectric device, photoelectric device include：
First laser device 1, for launching first laser light beam；
Second laser 2, for launching second laser light beam；
DMD micro mirrors device 3, for realizing reflection and refraction to first laser light beam and second laser light beam；
First polarization splitting prism 4, is arranged at the side of DMD micro mirrors device 3, for first laser light beam and/or second
Laser beam realizes refraction and transmission；
Second polarization splitting prism 5, is arranged at the side of the first polarization splitting prism 4, and the first polarization splitting prism 4 is set
Be placed between DMD micro mirrors device 3 and the second polarization splitting prism 5, the second polarization splitting prism 5 be used for first laser light beam and/
Or second laser light beam realizes refraction and transmission；
First half-wave plate 6, is arranged between the first polarization splitting prism 5 and DMD micro mirrors device 3, for adjusting first laser
The polarization angle of light beam；
Second half-wave plate 7, is arranged between the first polarization splitting prism 4 and the second polarization splitting prism 5, for adjusting the
The polarization angle of dual-laser light beam.
3rd half-wave plate 8, the 3rd half-wave plate 8 are arranged between 1 and first polarization splitting prism 4 of first laser device, are used for
The polarization angle for the first laser light beam that adjustment first laser device 1 is sent so that by the first laser light beam of the 3rd half-wave plate 8
Can all it be reflected by the first polarization splitting prism 4；
4th half-wave plate 9, the 4th half-wave plate 9 are arranged between 2 and second polarization splitting prism 5 of second laser, are used for
The polarization angle for the second laser light beam that adjustment second laser 2 is sent so that by the second laser light beam of the 4th half-wave plate 9
Can all it be reflected by the second polarization splitting prism 5；
Dichroscope 10, dichroscope 10 are used for the first laser light beam reflected by DMD micro mirrors device 3 and pass through DMD
The second laser light beam that micro mirror device 3 reflects carries out closing beam coupling.
Anti-dazzling screen 11 is equipped with box body 1, cavity is divided into by anti-dazzling screen 11 switches chamber 12 and coupler 13, first laser device 1,
Second laser 2, DMD micro mirrors device 3, the first polarization splitting prism 4, the second polarization splitting prism 5, the first half-wave plate 6, the second half
Wave plate 7, the 3rd half-wave plate 8 and the 4th half-wave plate 9 are arranged in switching chamber 12, and dichroscope 10 is arranged in coupler 13.
The first perforated hole 14 and the second perforated hole 15 are equipped with anti-dazzling screen 11, the first perforated hole 14 is used for first laser light
Beam is incident upon coupler 13 from switching chamber 12, and the second perforated hole 15 is used for second laser light beam and is incident upon coupler 13 from switching chamber 12.
Some speculums 16 are additionally provided with box body 1.
A kind of light beam switching method, carries out light beam switching using Beam switching device, comprises the following steps：
S1 first laser devices 1 launch first laser light beam, and second laser 2 launches first laser light beam；
S2 first lasers light beam and second laser light beam pass through the first polarization splitting prism 4 and the second polarization spectro rib respectively
Mirror 5 is reflected；
First laser light beams of the S3 after the refraction of the first polarization splitting prism 4 is incident upon DMD micro mirrors by the first half-wave plate 6
The reflecting part 31 of device 3；
S4 judges whether the reflecting part 31 of DMD micro mirrors device 3 is reflective condition,
If reflective condition, then after former road reflection is carried out to first laser light beam, into S5,
If not reflective condition, then first laser light beam is not reflected；
S5 carries out polarization angle adjustment by the first laser light beam that DMD micro mirrors device 3 reflects by the first half-wave plate 6, makes
Obtain the first laser light beam to transmit from the first polarization splitting prism 4 and the second polarization splitting prism 5 successively, pass through the first perforated hole
14 enter coupler 13；
Second laser light beams of the S6 after the refraction of the second polarization splitting prism 5 carries out the angle of polarization by the second half-wave plate 7
Degree adjustment so that the second laser light beam is transmitted from the second polarization splitting prism 5, is incident upon the refraction part 32 of DMD micro mirrors device 3；
S7 judges whether the refraction part 32 of DMD micro mirrors device 3 is refractive status,
If refractive status, then second laser light beam is reflected, deflect the beam angle of the second laser light beam
24 °, coupler 13 is entered by the second perforated hole 15,
If not refractive status, then second laser light beam is not reflected；
After S8 enters the first laser light beam in coupler and/or second laser light beam by dichroscope 10, then pass through
Couple object lens 17 and carry out light beam coupling, enter back into optical fiber.It is the position for connecing optical fiber that arrow is signified in Fig. 1.
Step S1 further includes step in detail below：
S1.1 first laser devices 1 launch first laser light beam, and first laser light beam carries out the angle of polarization by the 3rd half-wave plate 8
Degree adjustment；
S1.2 second lasers 2 launch second laser light beam, and second laser light beam carries out the angle of polarization by the 4th half-wave plate 9
Degree adjustment.
A kind of Beam switching device of the present invention and switching method have the advantages that：
First, the reflecting part 31 of control DMD micro mirrors device 3 realizes first laser light beam and second laser light with refraction part 32
The switching of beam, switching efficiency are high.
First by the 3rd half-wave plate 8 can be effectively ensured in the setting of the second, the three half-wave plate 8 and the 4th half-wave plate 9
Laser beam can be reflected all by the first polarization splitting prism 4, ensure the second laser light beam energy quilt by the 4th half-wave plate 9
All by 5 refraction by prism of the second polarization spectro.
3rd, cavity is divided into switching chamber 12 and coupler 13 by anti-dazzling screen 11, can be switched effectively by switching chamber 12
During the veiling glare that produces isolated, prevent it from entering coupler 13, ensure that the light beam in coupler 13 is interference-free.
New preferred embodiment, it is noted that for those of ordinary skill in the art, do not departing from this hair
On the premise of bright creation design, various modifications and improvements can be made, these belong to protection scope of the present invention.
Claims (4)
1. a kind of Beam switching device, including the box body of cavity and the photoelectric device being arranged in the cavity are internally provided with,
It is characterized in that, the photoelectric device includes：
First laser device, for launching first laser light beam；
Second laser, for launching second laser light beam；
DMD prays for mirror device, for realizing reflection and refraction to the first laser light beam and the second laser light beam；
First polarization splitting prism, is arranged at the side of the DMD micro mirrors device, for the first laser light beam and/or institute
State second laser light beam and realize refraction and transmission；
Second polarization splitting prism, is arranged at the side of first polarization splitting prism, and first polarization splitting prism
It is arranged between the DMD micro mirrors device and second polarization splitting prism, second polarization splitting prism is used for described
First laser light beam and/or the second laser light beam realize refraction and transmission；
First half-wave plate, is arranged between first polarization splitting prism and the DMD micro mirrors device, for adjusting described first
The polarization angle of laser beam；
Second half-wave plate, is arranged between first polarization splitting prism and second polarization splitting prism, for adjusting
The polarization angle of the second laser light beam；
3rd half-wave plate, the 3rd half-wave plate are arranged between the first laser device and first polarization splitting prism,
The polarization angle of the first laser light beam sent for adjusting the first laser device so that pass through the 3rd half-wave plate
The first laser light beam can by all by the first polarization splitting prism reflect；
4th half-wave plate, the 4th half-wave plate are arranged between the second laser and second polarization splitting prism,
The polarization angle of the second laser light beam sent for adjusting the second laser so that pass through the 4th half-wave plate
The second laser light beam can by all by the second polarization splitting prism reflect；
Dichroscope, the dichroscope are used to that the first laser light beam of the reflection of mirror device and refraction will to be prayed for by the DMD
The second laser light beam for reflecting and reflecting with by the DMD micro mirrors device carries out conjunction beam and couples；
Anti-dazzling screen is equipped with the box body, the cavity is divided into switching chamber and the coupler by the anti-dazzling screen, in the screening
Mating plate is equipped with the first perforated hole and the second perforated hole, and first perforated hole is used for the first laser light beam from the switching
Chamber is incident upon the coupler, and second perforated hole is used for the second laser light beam and is incident upon the coupling from the switching chamber
Chamber, the first laser device, the second laser, the DMD micro mirrors device, first polarization splitting prism, described second
Polarization splitting prism, first half-wave plate, second half-wave plate, the 3rd half-wave plate and the 4th half-wave plate are set
The switching intracavitary is placed in, the dichroscope is arranged in the coupler.
2. a kind of light beam switching method, it is characterised in that carry out light beam using the Beam switching device described in claim 1 and cut
Change, comprise the following steps：
S1 first laser devices launch first laser light beam, second laser transmitting second laser light beam；
S2 first lasers light beam and second laser light beam respectively by the first polarization splitting prism and the second polarization splitting prism into
Row refraction；
First laser light beams of the S3 after the refraction of the first polarization splitting prism is incident upon the anti-of DMD micro mirror devices by the first half-wave plate
Penetrate portion；
S4 judges whether the reflecting part that DMD prays for mirror device is reflective condition,
If reflective condition, then after former road reflection is carried out to first laser light beam, into S5,
If not reflective condition, then first laser light beam is not reflected；
The first laser light beam that S5 prays for the reflection of mirror device by DMD passes through the first half-wave plate and carries out polarization angle adjustment so that this
One laser beam is transmitted from the first polarization splitting prism and the second polarization splitting prism successively, is entered by the first perforated hole and coupled
Chamber；
Second laser light beams of the S6 after the refraction of the second polarization splitting prism carries out polarization angle adjustment by the second half-wave plate,
So that the second laser light beam is transmitted from the second polarization splitting prism, the refraction part of DMD micro mirror devices is incident upon；
S7 judges whether the refraction part that DMD prays for mirror device is refractive status,
If refractive status, then second laser light beam is reflected, the second laser light beam is entered by the second perforated hole
Coupler,
If not refractive status, then second laser light beam is not reflected.
3. light beam switching method according to claim 2, it is characterised in that the step S1 is further included to be walked in detail below
Suddenly：
First laser device described in S1.1 launches first laser light beam, and the first laser light beam is polarized by the 3rd half-wave plate
Angle adjusts；
Second laser described in S1.2 launches second laser light beam, and the second laser light beam is polarized by the 4th half-wave plate
Angle adjusts.
4. light beam switching method according to claim 2, it is characterised in that the light beam switching method further includes：
S8 is laggard by dichroscope into the first laser light beam in the coupler and/or the second laser light beam
Enter optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018352.0A CN105467582B (en) | 2015-12-30 | 2015-12-30 | A kind of Beam switching device and switching method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511018352.0A CN105467582B (en) | 2015-12-30 | 2015-12-30 | A kind of Beam switching device and switching method |
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| CN105467582A CN105467582A (en) | 2016-04-06 |
| CN105467582B true CN105467582B (en) | 2018-04-17 |
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| CN114459342B (en) * | 2022-01-25 | 2023-07-04 | 华南师范大学 | On-axis and off-axis digital holographic switching device based on parallel beam splitting prism |
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| US6980280B2 (en) * | 2001-10-12 | 2005-12-27 | Eastman Kodak Company | Two level image writer |
| JP2003161888A (en) * | 2001-11-26 | 2003-06-06 | Inst Of Physical & Chemical Res | Microscope illuminable with light of specific wavelength |
| JP2004309702A (en) * | 2003-04-04 | 2004-11-04 | Olympus Corp | Microscope |
| CN101884001A (en) * | 2007-11-30 | 2010-11-10 | 3M创新有限公司 | Comprise toric optical element and preparation method thereof |
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