CN104570327B - A kind of light filter of multi-strobe pattern high light beam quality - Google Patents
A kind of light filter of multi-strobe pattern high light beam quality Download PDFInfo
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Abstract
The present invention provides a kind of light filter of multi-strobe pattern high light beam quality, including：First dispersion element, being used for dissipating incipient beam of light is divergent beams, and for reduction gating light beam；Second dispersion element, for being converged to collimated light beam by described divergent beams and will gate beam convergence；Filter element, for the described collimated light beam from described second dispersion element, the light beam of wavelength needed for gating obtains described gating light beam, and described gating light beam is reflexed to described second dispersion element；Controller, for controlling the light beam of wavelength needed for described filter element gating；And light beam gateway, for controlling described incipient beam of light to be incident to described first dispersion element and for controlling the described gating beam exit of described first dispersion element reduction to described light filter.The light filter of the present invention can carry out 2nd order chromatic dispersion compensation, has long logical, short logical, band logical and band four kinds of gated mode of resistance and Wavelength tunable.
Description
Technical field
The invention belongs to optical spectra control, measurement, analysis field and fiber optic component field, it is related to the optical filtering of light beam, divides
The fields such as light, 2nd order chromatic dispersion compensation, more particularly, to a kind of light filter of multi-strobe pattern high light beam quality.
Background technology
At present, the filter element used in biochemistry spectrum analyses is mainly optical filter and monochromator, these yuan
The each have their own limitation of part.For optical filter, the wavelength of common optical filter select non-adjustable it is difficult to carry out spectrum control；
In spectrum analyses, multiple required optical filters to be prepared, frequently change optical filter and also increase workload to spectrum analyses.Its
Secondary；When the energy of light source is stronger, optical filter is easily damaged or greatly reduces use time.
For monochromator, its export as slit that is to say, that can only obtain band logical light it is impossible to obtain long logical or
Short logical light.Secondly, if the energy of flashlight is stronger, the contrast of the light that monochromator obtains will be relatively low.In low light signals
In quick measurement, the usual very little of photosensitive area of detector, the photosensitive area radius of such as avalanche photodide (APD) only has
Tens microns are even more little, conventional monochromatic process after just by slit outgoing, form bar shaped laser spot, be difficult to be focused into very
Little hot spot, this adds increased the difficulty of the quick measurement of the low light level.In addition, the bar shaped laser spot of monochromator outgoing also is difficult to be coupled to light
In fibre, this reduces the propagation efficiency of light beam.
In addition, above-mentioned optical filter and monochromator also can make pulse optical dispersion make pulse stretcher.
Therefore, need badly a kind of be easy to focus on, be easy to spectrum control, high light beam quality and dispersion compensation can be carried out
Filtering device.
Content of the invention
It is an object of the invention to providing a kind of high light beam quality for spectrum control, measurement, analysis, 2nd order chromatic dispersion can be carried out
Compensate, there is long logical, short logical, band logical and the light filter with hindering four kinds of gated mode and Wavelength tunable, the present invention can extensively apply
In biology, the signal detection and signal analysis of chemical analysis field.
The light filter of the multi-strobe pattern high light beam quality of the present invention, including：First dispersion element, is used for dissipating initial light
Restraint as divergent beams, and for reduction gating light beam；Second dispersion element, for being converged to directional light by described divergent beams
Restraint and beam convergence will be gated；Filter element, for the described collimated light beam from described second dispersion element, gating is required
The light beam of wavelength obtains described gating light beam, and described gating light beam is reflexed to described second dispersion element；Controller, is used for
Control the light beam of wavelength needed for described filter element gating；And light beam gateway, for controlling described incipient beam of light to be incident to
Described first dispersion element and the described gating beam exit extremely described optical filtering for controlling described first dispersion element reduction
Outside device.
Preferably, described first dispersion element and described second dispersion element constitute dispersion element pair, described dispersion element
To for waiting girdle prism pair, or grating pair.
Preferably, described girdle prism is waited to be to be suitable for the Brewster angle of gating wavelength to base angle size it is adaptable to initial
Light beam is line polarized light.
Preferably, described wait girdle prism to base angle size be suitable for the Brewster angle of gating wavelength and surface be coated with suitable
Close the anti-reflection film of this wavelength it is adaptable to incipient beam of light is non-line polarized light.
Preferably, described filter element can be in the light plate modulator and reflecting mirror, transmissive spatial photomodulator and
Reflecting mirror, reflective spatial light modulator.
Preferably, described controller is used for the wavelength controlling filter element to gate light beam.
Preferably, the described plate modulator that is in the light, including the first light barrier, the second light barrier, the first translation stage, the first rotation
Turntable, the second translation stage.The first described light barrier is fixed on the first translation stage, can be in level on beam direction
Mobile；On the first fixing turntable of the second described light barrier, can rotate in the horizontal plane；Described the first translation stage and
First turntable is fixed on the second translation stage, and can move horizontally on beam direction again.
Preferably, described filter element is if transmissive spatial photomodulator or reflective spatial light modulator,
Described controller is used for the distribution controlling the transmitance and reflectance of spatial light modulator in space.
Preferably, there are spatial light diaphragm formula and optical fiber optical coupling interface type in described replaceable gateway, including spatial light
Incident diaphragm, outgoing diaphragm and optical fiber light coupled light interface, outgoing coupling interface, can arbitrarily switch as needed.
The present invention, compared with existing filtering apparatus, has advantages below：
1st, the present invention adopts dispersion element pair, by regulation dispersion element pair apart from resolution-adjustable, by changing
The angle of incidence of the insertion of dispersion element or regulation initial light can carry out 2nd order chromatic dispersion compensation to incipient beam of light, reduces initial light
The pulsewidth of bundle；
2nd, the present invention has four wavelength gated mode it is easy to carry out spectrum control, can be in long logical, short logical, band logical and band resistance
Free switching between four kinds of gated mode, it is to avoid frequently change optical filter in spectral measurement and analysis；
3rd, the present invention can be used for the optical filtering of high power light source, for common optical filter in high-power shorter the asking of lower service life
Topic provides solution, also relatively low provides solution for the resolution of high-power lower monochromator；
4th, the present invention is compared to monochromator, and the hot spot of the high light beam quality of acquisition is circular light spot it is easy to focus on it is easy to coupling
Close in optical fiber；
5th, the present invention is simple and easy to do, can carry out the Electronic control of four gated mode one, also dependent on user need into
The easy control of row single-mode.
Brief description
Fig. 1 is the structural representation of the light filter of the multi-strobe pattern high light beam quality according to the present invention；
Fig. 2 is the structural representation according to first embodiment of the invention based on the prism light filter of the plate modulator that is in the light；
Fig. 3 is according to the prism light filter gating element based on the plate modulator that is in the light for the second embodiment of the invention and four kinds
The schematic diagram of filter element position under gated mode, (a) is short logical pattern, (b) is long logical pattern, (c) is bandpass mode, (d)
For bandstop mode, (e) is the structural representation of gating element；
Fig. 4 is the reflective gratings light filter according to second embodiment of the invention based on transmissive spatial photomodulator
Structural representation；
Fig. 5 is the knot according to third embodiment of the invention based on the transmission-type grating light filter of reflective spatial light modulator
Structure schematic diagram.
Specific embodiment
Specific embodiments of the present invention are further described in detail with reference to the accompanying drawings and examples, but should be with
This limits the scope of the invention.
Fig. 1 is the structural representation of the light filter according to multi-strobe pattern high light beam quality of the present invention, and this light filter 10 wraps
Include the first dispersion element 1, the second dispersion element 2, filter element 3, controller 4, beam inlet 5 and beam outlet 6.
First dispersion element 1, being used for dissipating incipient beam of light is divergent beams, and is derived from the second dispersion element for reduction
2 gating light beam.Second dispersion element 2, for the divergent beams from the first dispersion element 1 are converged to collimated light beam, with
And by the gating beam convergence from filter element.First dispersion element 1 and the second dispersion element 2 constitute dispersion element pair.Filter
Optical element 3, needed for for gating to the collimated light beam from the second dispersion element 2, the light beam of wavelength is thus obtain this gated optical
Bundle, and this gating light beam is reflexed to the second dispersion element 2.Controller 4, for controlling filter element 3 to gate required wavelength
Light beam.Beam inlet 5, for controlling incipient beam of light to be incident to described first dispersion element 1.Beam outlet 6 is used for control first
The gating beam exit of dispersion element 1 reduction is to light filter 10.
Explanation below obtains the process of gating wavelength light beam by this light filter 10.First, incipient beam of light is entered by light beam
Mouth 5 is parallel to be incided in the first dispersion element 1, forms divergent beams after reflection, refraction or diffraction.Here, if initial light
Bundle is space directional light, then beam inlet 5 is spatial light incidence diaphragm 5；If incipient beam of light is optical fiber light, beam inlet 5
For optical fiber light coupled light interface 5.
Then, this divergent beams incides the second dispersion element 2, reflect through the second dispersion element 2, reflect or diffraction after
Form collimated light beam.The section of this collimated light beam is strip, is arranged in order by wavelength order in space.This parallel beam incident
To in filter element 3, controller 4 controls filter element to select the component of required wavelength, and light (the i.e. gated optical by this component
Bundle) it is reflected back the second dispersion element 2.
The reflected beams (gating light beam) reflect through the second dispersion element 2, reflect or diffraction after form the light beam of convergence,
Assemble gating light beam reflect through the first dispersion element 1 again, reflect or diffraction after formation collimated light beam, the gating that will assemble
Light beam is reduced to parallel gating light beam.
Finally, parallel gating light beam passes through beam outlet 6 outgoing to this light filter 10.Here, the feelings of spatial light
Under condition, beam outlet 6 is spatial light outgoing diaphragm 6, and obtaining hot spot is circular and the collimated light beam consistent with incident illumination.Optical fiber light
In the case of, beam outlet 6 is optical fiber light outgoing coupling interface 6, and gating light beam is coupled to by optical fiber light outgoing coupling interface 6
In optical fiber.
Can be cut as needed between above-mentioned spatial light diaphragm formula gateway and optical fiber optical coupling interface type gateway
Change.
With reference to Fig. 2 and Fig. 3, the first embodiment of the present invention is described in detail.
Fig. 2 is the structural representation according to first embodiment of the invention based on the prism light filter of the plate modulator that is in the light,
Fig. 3 is according to the prism light filter gating element based on the plate modulator that is in the light for the first embodiment of the invention and four kinds of gated mode
The schematic diagram of lower filter element position, (a) is short logical pattern, (b) is long logical pattern, (c) is bandpass mode, (d) is band resistance mould
Formula, (e) is the structural representation of gating element.
As shown in Fig. 2 being included based on the prism light filter 20 of the plate modulator that is in the light：First grade girdle prism 11 and the second isosceles
Prism 12 (i.e. the first dispersion element and the second dispersion element), be in the light plate modulator 13, controller 14 and reflecting mirror 15, is in the light
Plate modulator 13 and reflecting mirror 15 constitute filter element.The girdle prisms 12 such as the first grade girdle prism 11 and second constitute dispersion element pair
(prism to).As Fig. 3 (e) show the structural representation of gating element (be in the light plate modulator 13 and controller 14).It is in the light
Plate modulator 13 includes the first light barrier 131, the second light barrier 132, and the first translation stage 133, the first turntable 134 and second are flat
Moving stage 135, wherein said first light barrier 131 is fixed on the first translation stage 133, and the second light barrier 132 is fixed on the first rotation
On turntable 134, the first translation stage 133 and the first turntable 134 are fixed on the second translation stage 135.Controller 14 passes through to control
First translation stage 133, the first turntable 134 and the second translation stage 135, can move the first light barrier 131 and the second light barrier
132 position, you can realize to dissimilar and wavelength light gating.In the present embodiment, translation stage 133,135 or turntable
134 include motor and guide rail.Controller 14 is e.g. mounted with the computer equipment of control software/control module.Controller 14
Control the movement of translation stage and the rotation of turntable by sending the action of instruction controlled motor.First mobile station 133, second
Translation stage 135 can move horizontally (planar moving horizontally) in drawing on the direction of light beam.First rotation
Turntable 134 planar can horizontally rotate in drawing.By mobile second translation stage 135, first gear can be moved simultaneously
Tabula rasa 131 and the second light barrier 132.
In addition, in Fig. 2, d1For the insertion of the first grade girdle prism 11, d2For the insertion of the second grade girdle prism 12, L is the
The distance in the adjacent, parallel faces of girdle prism 12 such as first-class girdle prism 11 and second.Adjust L, it is possible to achieve the regulation to resolution,
To the first grade girdle prism 11 amount of being suitably inserting d1, choose suitable L, by adjusting insertion d of the second grade girdle prism 122, that is,
The regulation and control that achievable 2nd order chromatic dispersion compensates.For continuous light it is not necessary to carry out dispersion compensation, as long as choose suitable resolution being
Can；For pulsed light, if required to pulsewidth, you can by adjusting L and d2Realizing dispersion can from positive to negative, from small to large
Change, thus the pulsewidth of light pulse is minimized.
The following detailed description of first embodiment of the invention based on the plate modulator that is in the light can dispersion compensation prism filter
Device realize process.
As shown in Fig. 2 the girdle prism 12 base angle size such as first grade girdle prism 11 and second is to be suitable for the Bu Lu of gating wavelength
This special angle is it is adaptable to incipient beam of light is line polarized light.Prism surface can also be coated with the anti-reflection film of this wavelength suitable.And it is described
Prism antiparallel placement to bottom surface, L is the distance in the adjacent, parallel faces of girdle prism 12 such as the first grade girdle prism 11 and second.Give
First grade girdle prism 11 amount of being suitably inserting d1, choose suitable L, by adjusting insertion d of the second grade girdle prism 122, you can
Realize dispersion can from positive to negative, change from small to large, thus the pulsewidth of light pulse is minimized.
(1) realization of short logical optical filtering
As shown in Fig. 3 (a), mobile first translation stage 133, so that the first light barrier 131 is close to the second light barrier 132, moves
Dynamic second translation stage 135 arrives long wave side so that outside (away from the side of the first light barrier 131) position of the second light barrier 132
In the cutoff wavelength position of gating wavelength, this allows for the partly screened out of the following wavelength of cutoff wavelength.For example, initially
The spectral region of light is 550-650nm, and the spectral region of needs is the short logical part of 600nm, as described above, mobile first translation
So that the first light barrier 131 is close to the second light barrier 132, mobile second translation stage 135 arrives 650nm side so that the to platform 133
The outside (away from side of the first light barrier 131) of two light barriers 132 be located at 600nm locate, wavelength more than 600nm part just by
Second light barrier 132 blocks, and the part of below 600nm is just screened out.
(2) the long logical realization filtering
As shown in Fig. 3 (b), mobile first translation stage 133, so that the first light barrier 131 is close to the second light barrier 132, moves
Dynamic second translation stage 135 arrives shortwave side so that outside (away from the side of the second light barrier 132) position of the first light barrier 131
In the cutoff wavelength position of gating wavelength, this allows for the partly screened out of cutoff wavelength wavelengths above.For example, initially
The spectral region of light is 550-650nm, and the spectral region of needs is the part that 600nm length is led to, as described above, mobile first translation
So that the first light barrier 131 is close to the second light barrier 132, mobile second translation stage 135 makes the second light barrier 132 move to platform 133
Move 650nm side so that the outside (away from side of the second light barrier 132) of the first light barrier 131 is located at 600nm, ripple
The long part less than 600nm is just blocked by the first light barrier 131, and the part of more than 600nm is just screened out.
(3) realization of bandpass filter
As shown in Fig. 3 (c), mobile first translation stage 133 is so that shape between the first light barrier 131 and the second light barrier 132
Become a slit, and determine the width of slit according to the bandwidth of required gating wavelength.Mobile second translation stage 135 is so that narrow
The center of seam is located at the centre wavelength position of gating wavelength, and this has just filtered out the wavelength of band logical.For example, the light of initial light
Spectral limit is 550-650nm, and the spectral region of needs is 595-605nm bandpass part, as described above, mobile first translation stage
133, make to form a slit between the first light barrier 131 and the second light barrier 132 according to this bandpass part, mobile second is flat
So that slit is centrally located at 600nm position, the wavelength bandwidth of the width gating of slit is 10nm to moving stage 135, and this just filters out
Centre wavelength is in a width of 10nm band thang-kng (i.e. 595-605nm bandpass part) of 600nm band.
(4) realization filtering with resistance
As shown in Fig. 3 (d), mobile first translation stage 133 is so that the spacing of the first light barrier 131 and the second light barrier 132
Away from enough, will not stop that light is preferred with the first light barrier 131, mobile second translation stage 135 is so that light barrier 132 center
Position is located at the central wavelength with resistance, and the first turntable 134 is rotated to an angle so that the light of part wavelength is by second gear
Tabula rasa 132 blocks, and this has just filtered out the wavelength with resistance.For example, the spectral region of initial light is 550-650nm, needs to filter
The part of 595-605nm, as described above, mobile first translation stage 133 is so that the spacing of light barrier 131 and the second light barrier 132
Away from enough, make the first light barrier 131 mobile to the position that will not stop light, mobile second translation stage 135 is so that light barrier
132 centers are located at 600nm, the first turntable 134 are rotated to an angle so that the light quilt of the part of 595-605nm
Second light barrier 132 blocks, and this has just filtered out the light of the wavelength of 550-595nm and 605nm-650nm.
With reference to Fig. 4 and Fig. 5, second and third embodiment of the present invention is described in detail.
Fig. 4 is the knot of the reflective gratings light filter 40 based on transmissive spatial photomodulator of second embodiment of the invention
Structure schematic diagram.This light filter 40 includes the first reflecting grating 21 and the second reflecting grating 22 (i.e. the first dispersion element and the second color
Scattered element), this first reflecting grating 21 and the second reflecting grating 22 constitute dispersion element to (reflecting grating to).Described reflected light
The diffraction plane of grid pair is parallel to each other.It is empty that incipient beam of light forms banding after the first reflecting grating 21 and the second reflecting grating 22
Between distribution light beam.This light filter 40 also includes constituting transmissive spatial optical modulation element 23 and the reflecting mirror 231 of filter element.
The light beam forming banding spatial distribution after the first reflecting grating and the second reflecting grating passes through transmissive spatial optical modulating element
Part 23.This light filter 40 also includes controller 24, and this controller 24 passes through to control transmissive spatial optical modulation element 23 saturating in light
Penetrate region transmitance distribution to can achieve to dissimilar and wavelength light gating.In the present embodiment, transmissive spatial light modulation
Element 23 can form as one with controller 24, for example commercially available transmissive spatial photomodulator.
In Fig. 4, θ is the angle of incidence in the first reflecting grating 21 for the initial light, and L is the first reflecting grating 21 and the second reflected light
The distance of grid 22 parallel surface.Adjust L, it is possible to achieve the regulation to resolution.Choose suitable L, by adjusting initial light the
The incidence angle θ of one reflecting grating 21, you can realize the regulation and control of 2nd order chromatic dispersion compensation.For continuous light it is not necessary to carry out dispersion benefit
Repay, as long as choosing suitable resolution, for pulsed light, if required to pulsewidth, you can realized by adjusting L and θ
Dispersion can from positive to negative, change from small to large, thus the pulsewidth of light pulse is minimized.
The reflective gratings dispersion compensation based on transmissive spatial photomodulator of second embodiment of the invention is described below
Light filter realize process.
As shown in figure 4, the diffraction plane of the first reflecting grating 21 and the second reflecting grating 22 is parallel to each other, incipient beam of light warp
Form the light beam of banding spatial distribution, θ is initial light in the first reflecting grating after crossing the first reflecting grating and the second reflecting grating
21 angle of incidence, L is the first reflecting grating 21 and the distance of the second reflecting grating 22 parallel surface.Adjust L, it is possible to achieve to resolution
The regulation of rate.Choose suitable L, by adjusting the incidence angle θ in the first reflecting grating 21 for the initial light, you can realize dispersion from just
To negative, change from small to large, thus the pulsewidth of light pulse is minimized.
Controller 24 passes through to control transmissive spatial optical modulation element 23 to be distributed in the transmitance of light transmission region, for example logical
Cross control transmissive spatial optical modulation element 23 Electric Field Distribution come to control absorbance be distributed.For example, will be big for light beam regional transmission
Transmitance in the region of 500nm is adjusted to 0, you can realize the short logical optical filtering of 500nm；Likewise, by the region less than 500nm
Transmitance is adjusted to 0, you can realizes 500nm length and leads to optical filtering；The transmitance of 480nm-500nm two side areas is adjusted to 0, you can
Realize 480nm-500nm bandpass filter；The transmitance in 480nm-500nm region is adjusted to 0, you can realize 480nm-500nm
Band resistance filters.
Fig. 5 is the knot of the transmission-type grating light filter 50 based on reflective spatial light modulator of third embodiment of the invention
Structure schematic diagram.This light filter 50 includes the first transmission grating 31 and the second transmission grating 32 (i.e. the first dispersion element and the second color
Scattered element), the first transmission grating 31 and the second transmission grating 32 constitute dispersion element to (transmission grating to).Described transmission grating
To diffraction plane be parallel to each other.Incipient beam of light forms banding space after the first transmission grating 31 and the second transmission grating 32
The light beam of distribution.This light filter 50 also includes constituting the Reflective spatial optical modulation element 33 of filter element.Through the first transmission
The light beam forming banding spatial distribution after grating and the second transmission grating passes through Reflective spatial optical modulation element 33.This light filter
40 also include controller 34.This controller 34 passes through to control Reflective spatial optical modulation element 33 in incident area reflectivity distribution
Can achieve to dissimilar and wavelength light gating.In the present embodiment, Reflective spatial optical modulation element 33 and controller 34
Can form as one, for example commercially available reflective spatial light modulator.
In Fig. 5, θ is the angle of incidence in the first transmission grating 31 for the initial light, and L is the first transmission grating 31 and the second transmitted light
The distance of grid 32 parallel surface.Adjust L, it is possible to achieve the regulation to resolution.Choose suitable L, by adjusting initial light the
The incidence angle θ of one transmission grating 31, you can realize the regulation and control of 2nd order chromatic dispersion compensation.For continuous light it is not necessary to carry out dispersion benefit
Repay, as long as choosing suitable resolution, for pulsed light, if required to pulsewidth, you can realized by adjusting L and θ
Dispersion can from positive to negative, change from small to large, thus the pulsewidth of light pulse is minimized.
The transmission-type grating dispersion compensation based on reflective spatial light modulator of third embodiment of the invention is described below
Light filter realize process.
As shown in figure 5, the diffraction plane of the first transmission grating 31 and the second transmission grating 32 is parallel to each other, incipient beam of light warp
Form the light beam of banding spatial distribution, θ is initial light in the first transmission grating after crossing the first transmission grating and the second transmission grating
31 angle of incidence, L is the first transmission grating 31 and the distance of the second transmission grating 32 parallel surface.Adjust L, it is possible to achieve to resolution
The regulation of rate.Choose suitable L, by adjusting the incidence angle θ in the first transmission grating 31 for the initial light, you can realize dispersion from just
To negative, change from small to large, thus the pulsewidth of light pulse is minimized.
Controller 34 passes through to control the reflectivity distribution in light entrance area for the Reflective spatial optical modulation element 33, for example logical
Cross the Electric Field Distribution controlling Reflective spatial optical modulation element 33 controlling reflectivity distribution.For example, beam feeding sputtering area is big
Reflectance in the region of 500nm is adjusted to 0, you can realize the short logical optical filtering of 500nm；Likewise, by the region less than 500nm
Reflectance is adjusted to 0, you can realizes 500nm length and leads to optical filtering；The reflectance of 480nm-500nm two side areas is adjusted to 0, you can
Realize 480nm-500nm bandpass filter；The reflectance in 480nm-500nm region is adjusted to 0, you can realize 480nm-500nm
Band resistance filters.
In the above-described embodiments although first embodiment is prism pair and the combining of the plate modulator that is in the light, second and third enforcement
Example be grating to and spatial light modulator combination, but, those skilled in the art can also realize prism to and spatial light adjust
The combination of device processed, or grating, to the combination with the plate modulator that is in the light, can reach same technique effect.
In addition, it is necessary to explanation, after the first installation of light filter of the present invention, need the calibration operation being filtered,
I.e. according to whether dispersion compensation, the resolution needing, gating element position is corrected.Concrete correcting mode is as follows.
First, the position of initial incident light to be fixed is it is ensured that enter light filter from a position every time；Afterwards, according to
Necessary resolution determines the distance between the first dispersion element 1 and the second dispersion element 2 L that is to say, that realizing the most suitable resolution
Need while rate to ensure by changing the insertion of dispersion element or angle of incidence can be changed to light beam dispersion compensation；To filter
The position of optical element is corrected, for example, when filter element is for light barrier, need to correct light barrier modulation under each gated mode
The position of device (including light barrier, translation stage and turntable), when filter element is for spatial optical modulation element, needs correction light to enter
Penetrate wavelength and the position of each film micro area of region.Finally, these positional informationes are stored controller, you can realize to gating ripple
Long control.
Embodiment described above is only presently preferred embodiments of the present invention, is not used for limiting the practical range of the present invention.Appoint
What those of ordinary skill in the art, without departing from the spirit and scope of the present invention, when can make various change with
Retouching, the scope of the present invention should be defined by the protection domain that claims are defined.
Claims (10)
1. a kind of light filter of multi-strobe pattern high light beam quality, its special type is, including：
First dispersion element, being used for dissipating incipient beam of light is divergent beams, and for reduction gating light beam；
Second dispersion element, for being converged to collimated light beam by described divergent beams and will gate beam convergence；
Filter element, for the described collimated light beam from described second dispersion element, the light beam of wavelength needed for gating obtains
Described gating light beam, and described gating light beam is reflexed to described second dispersion element；Described filter element is modulated for light barrier
Device, the described plate modulator that is in the light includes：
First light barrier and the second light barrier, for gating the light of required wavelength；
First translation stage, is used for fixing the first light barrier, with the position of mobile first light barrier；
First turntable, is used for fixing the second light barrier, to rotate the angle of the second light barrier；And
Second translation stage, is used for fixing the first translation stage and the first turntable, with mobile described first light barrier and described second
The position of light barrier；
Controller, for controlling the light beam of wavelength needed for described filter element gating；And
Light beam gateway, for controlling described incipient beam of light to be incident to described first dispersion element and being used for controlling described
The described gating beam exit of one dispersion element reduction is to described light filter.
2. the light filter of multi-strobe pattern high light beam quality according to claim 1 is it is characterised in that described first dispersion
Element constitutes dispersion element pair with described second dispersion element, and described dispersion element is to for waiting girdle prism pair, or grating pair.
3. the light filter of multi-strobe pattern high light beam quality according to claim 2 is it is characterised in that described wait girdle prism
To base angle size be suitable for gating wavelength Brewster angle.
4. the light filter of multi-strobe pattern high light beam quality according to claim 2 is it is characterised in that described wait girdle prism
To surface be coated be suitable for gating wavelength anti-reflection film.
5. the light filter of multi-strobe pattern high light beam quality according to claim 2 is it is characterised in that described grating is to bag
Include reflective gratings to and transmission-type grating pair, the diffraction plane of described grating pair is parallel to each other.
6. the light filter of multi-strobe pattern high light beam quality according to claim 1 is it is characterised in that described light barrier is adjusted
Device processed manually controls or carries out Electronic control by controller.
7. the light filter of multi-strobe pattern high light beam quality according to claim 1 is it is characterised in that needed for described gating
The gated mode of the light beam of wavelength includes long logical, short logical, band logical and band four kinds of gated mode of resistance.
8. the light filter of multi-strobe pattern high light beam quality according to claim 1 is it is characterised in that described light beam comes in and goes out
Mouth is changeable gateway, including spatial light diaphragm formula gateway and optical fiber optical coupling interface type gateway；Described spatial light light
Late formula gateway is spatial light incidence diaphragm, outgoing diaphragm；Described optical fiber optical coupling interface type gateway is optical fiber light incidence coupling
Splice grafting mouth, outgoing coupling interface, can root between described spatial light diaphragm formula gateway and optical fiber optical coupling interface type gateway
Switch over according to needs.
9. the light filter of multi-strobe pattern high light beam quality according to claim 2 is it is characterised in that described wait girdle prism
To including the girdle prisms such as the first grade girdle prism and second, by setting the first grade girdle prism amount of being suitably inserting d1, choose first
Deng suitable distance L between the adjacent, parallel face of the girdle prisms such as girdle prism and second, adjust insertion d of the second grade girdle prism2,
The regulation and control that achievable 2nd order chromatic dispersion compensates.
10. the light filter of multi-strobe pattern high light beam quality according to claim 2 is it is characterised in that described grating pair
Including the first grating and the second grating, by choosing suitable distance L between the first grating and the parallel surface of the second grating, adjust
The regulation and control that initial light compensates in the incidence angle θ of the first grating, achievable 2nd order chromatic dispersion.
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| CN201410828618.7A CN104570327B (en) | 2014-12-22 | 2014-12-22 | A kind of light filter of multi-strobe pattern high light beam quality |
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| CN104570327B true CN104570327B (en) | 2017-03-01 |
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| CN112098378A (en) * | 2020-08-05 | 2020-12-18 | 中国科学院深圳先进技术研究院 | Optical filter, optical filtering method and multispectral imaging system |
Citations (5)
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|---|---|---|---|---|
| US3907430A (en) * | 1973-08-13 | 1975-09-23 | Northrop Corp | Optical bandpass filter |
| US6204941B1 (en) * | 1992-07-09 | 2001-03-20 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Optical filtering device |
| CN1359173A (en) * | 2000-12-15 | 2002-07-17 | 中国科学院西安光学精密机械研究所 | Three-wavelength femtosecond laser cross pumping beam splitting and orienting device |
| CN1564051A (en) * | 2004-04-06 | 2005-01-12 | 中国科学院上海光学精密机械研究所 | Chirp pulse compressor |
| CN201107474Y (en) * | 2007-11-14 | 2008-08-27 | 中国科学院上海光学精密机械研究所 | Femtosecond pulse compression device |
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2014
- 2014-12-22 CN CN201410828618.7A patent/CN104570327B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3907430A (en) * | 1973-08-13 | 1975-09-23 | Northrop Corp | Optical bandpass filter |
| US6204941B1 (en) * | 1992-07-09 | 2001-03-20 | The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland | Optical filtering device |
| CN1359173A (en) * | 2000-12-15 | 2002-07-17 | 中国科学院西安光学精密机械研究所 | Three-wavelength femtosecond laser cross pumping beam splitting and orienting device |
| CN1564051A (en) * | 2004-04-06 | 2005-01-12 | 中国科学院上海光学精密机械研究所 | Chirp pulse compressor |
| CN201107474Y (en) * | 2007-11-14 | 2008-08-27 | 中国科学院上海光学精密机械研究所 | Femtosecond pulse compression device |
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