CN106483076B - Two-dimension spectrum device - Google Patents
Two-dimension spectrum device Download PDFInfo
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- CN106483076B CN106483076B CN201510535266.0A CN201510535266A CN106483076B CN 106483076 B CN106483076 B CN 106483076B CN 201510535266 A CN201510535266 A CN 201510535266A CN 106483076 B CN106483076 B CN 106483076B
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Abstract
The present invention provides a kind of two-dimension spectrum devices, including the first beam splitting chip, for the light being incident on the first beam splitting chip to be divided into the first incident light and the second incident light；First reflection unit obtains third incident light for reflecting the first incident light along first direction；Second reflection unit obtains and non-coplanar 4th incident light of third incident light for reflecting the second incident light in a second direction；Second beam splitting chip, for the 4th incident light to be divided into the first light beam and the second light beam in a second direction along first direction, and for third incident light to be divided into third light beam in a second direction and along the 4th light beam of first direction；Focusing device；Third reflection unit, for the first light beam to the 4th light beam to be incident on focusing device in same direction；And regulating device, the time interval of focusing device is incident on for adjusting the first light beam and the second light beam.Two-dimension spectrum device of the invention is small to the loss of light, and device is simple, light weight and small in size.
Description
Technical field
The present invention relates to optical instruments, and in particular to a kind of two-dimension spectrum device.
Background technique
Two-dimension spectrum is by monitoring some electronic state of molecule or the bands of a spectrum of vibration mode in one section of ultrafast time interval
Initial time and the degree of correlation of frequency of end time monitor the ultrafast dynamic change of molecule.By obtaining in different time
A series of two-dimension spectrums at interval, can monitor the dynamic change of molecular system on-line.Two-dimension spectrum technology is by first, second
It is successively incident on sample with three-beam, by constantly changing between the time that light beam and the second beam light are incident on sample
Every, and do Fourier transformation in the time domain to obtain the phase information of stimulating frequency.By spectrometer measurement sample at first three
The signal of the radiant light generated under the action of Shu Guang, and Fourier transformation is done to obtain the information in look-in frequency domain.In third
Four bundles light is incident on sample, the radiant light of electromagnetic radiation and the 4th beam by (usual several hundred femtoseconds) after Shu Guang is incident on sample
Light interferes, and the power spectrum and frequency plot of interference light are obtained by the signal of spectrometer measurement interference light.Therefore two
Spectrum is tieed up as a kind of emerging spectral technique, is widely used in the measurement of biology and the coupling of semiconductor samples energy level.
Existing two-dimension spectrum device generallys use grating or spatial light modulator and two beam laser is divided into four Shu Jiguang.But
That grating is very big to the loss of incident light, require in addition that incident light spectrum cannot too wide (within 200nm), therefore limit
Its application range commercially.And the at high cost of spatial light modulator, device are complicated, therefore also limit it commercially
Application range.
Summary of the invention
Above-mentioned technical problem existing for two-dimension spectrum device for the prior art, An embodiment provides
A kind of two-dimension spectrum device, comprising:
First beam splitting chip, for the light being incident on first beam splitting chip to be divided into the first incident light and the second incidence
Light；
First reflection unit obtains third incident light for reflecting first incident light along first direction；
Second reflection unit, it is incident with the third for reflecting to obtain second incident light in a second direction
Non-coplanar 4th incident light of light；
Second beam splitting chip, for being divided into the 4th incident light along the first light beam of the first direction and along described
Second light beam in two directions, and for being divided into the third incident light along the third light beam of the second direction and along described
4th light beam of first direction；
Focusing device；
Third reflection unit, for first light beam to the 4th light beam to be incident on the focusing device in same direction
On；And
Regulating device is incident on the time interval of the focusing device for adjusting first light beam and the second light beam.
Preferably, the third reflection unit is used for first light beam to the 4th light beam along the light of the focusing device
Axis is reflected on the focusing device, and makes the light path of first light beam equal to the light path of second light beam.
Preferably, the third reflection unit includes: the first reflecting mirror, is used for second light beam and third light beam edge
The optical axis of the focusing device is reflected on the focusing device；And second reflecting mirror and third reflecting mirror, for will be described
First light beam and the 4th light beam are reflected on the focusing device along the optical axis of the focusing device.
Preferably, the optical axis of the focusing device first direction in parallel, second reflecting mirror and third reflecting mirror
In parallel.
Preferably, the regulating device includes the first wedge pair in the optical path of first light beam and/or is located at
The second wedge pair in the optical path of second light beam.
Preferably, second reflection unit includes: hollow angle mirror, for receiving described in first beam splitting chip separates
Second incident light；And the 4th reflecting mirror, it is described for reflexing to the emergent light of the hollow angle mirror along the second direction
Second beam splitting chip.
Preferably, the first direction is parallel to the second party perpendicular to the second direction, first incident light
To, and second incident light is parallel to the first direction.
Preferably, first reflection unit include the 5th reflecting mirror for successively reflecting first incident light, it is the 6th anti-
Mirror and the 7th reflecting mirror are penetrated, the 5th reflecting mirror is vertical with first beam splitting chip, the 6th reflecting mirror and the described 5th
Reflecting mirror is vertical, the 7th reflecting mirror and the 5th mirror parallel.
Preferably, the focusing device is concave mirror.
Preferably, the two-dimension spectrum device further includes the 8th reflecting mirror, for reflecting that the focusing device focuses
One light beam to the 4th light beam.
There is no restriction for the spectrum of two-dimension spectrum device of the invention to incident light, and small to the loss of light；Mirror can be eliminated
Piece shakes the change to phase, to improve the stability of two-dimension spectrum device；In addition device is simple, light weight and small in size.
Detailed description of the invention
Embodiments of the present invention is further illustrated referring to the drawings, in which:
Fig. 1 is the index path of the two-dimension spectrum device of one embodiment according to the present invention.
Fig. 2 is the stereoscopic schematic diagram of a beam splitting chip in the two-dimension spectrum device in Fig. 1.
Fig. 3 is the index path of the two-dimension spectrum device of second embodiment according to the present invention.
Fig. 4 is the index path of the two-dimension spectrum device of third embodiment according to the present invention.
Fig. 5 is the index path of the two-dimension spectrum device of the 4th embodiment according to the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, pass through below in conjunction with attached drawing specific real
Applying example, the present invention is described in more detail.
Fig. 1 is the index path of the two-dimension spectrum device of one embodiment according to the present invention.As shown in Figure 1, two-dimension spectrum
Device 100 includes beam splitting chip 110, the first reflection unit 120, the second reflection unit 130, beam splitting chip 140, third reflection unit
150 and regulating device 160.
Femtosecond laser is divided into the first incident light 111 and the second incident light 112 after being incident to beam splitting chip 110.First is incident
Light 111 and the second incident light 112 are incident to the first reflection unit 120 and the second reflection unit 130 respectively.
First reflection unit 120 includes the reflecting mirror 121, reflecting mirror 122 and reflecting mirror for successively reflecting the first incident light 111
123.First incident light 111 successively projects after the reflection of reflecting mirror 121,122,123 along first direction D1, to obtain third
Incident light 111 '.
Second reflection unit 130 includes hollow angle mirror 131 and reflecting mirror 132.Hollow angle mirror 131 is one mutual by three
The reflecting system of vertical reflecting mirror composition, the light beam incident thereon exiting parallel after two secondary reflections, therefore it can have
Effect offsets the left and right shake and influence of the shake to optical path up and down of translation stage, to effectively improve the noise of entire measuring system
Than.Second incident light 112 is incident in hollow angle mirror 131, is incident to reflecting mirror from the light of hollow 131 exiting parallel of angle mirror
On 132, by the second incident light 112, D2 reflects reflecting mirror 132 in a second direction, to obtain the 4th incident light 112 '.Due in
The incident light and emergent light of empty angle mirror 131 are different at a distance from the platform (Fig. 1 is not shown) of fixed two-dimension spectrum device 100, because
This reflects the 4th obtained incident light 112 ' by reflecting mirror 132 and reflects obtained third incident light with by reflecting mirror 123
111 ' not in the same plane.
First direction D1 in the present embodiment is perpendicular to second direction D2, and the first incident light 111 and the 4th incident light
112 ' parallel second direction D2, the second incident light 112 and third incident light 111 ' are parallel to first direction D1.In this way on platform
It can conveniently adjust angle and the position of optical device, such as the angle of beam splitting chip 110 and second direction D2 is 45 °, reflection
Mirror 121 is perpendicular to beam splitting chip 110,122 vertical reflector 121 of reflecting mirror, 123 parallel mirror 121 of reflecting mirror.
Fig. 2 is the stereoscopic schematic diagram of the beam splitting chip 140 in the two-dimension spectrum device in Fig. 1.As shown in Fig. 2, beam splitting chip 140
It is equal to the angle of itself and the 4th incident light 112 ' with the angle of third incident light 111 '.Therefore beam splitting chip 140 is by the 4th incident light
112 ' are divided into the first light beam 141 and the second light beam 142 of D2 in a second direction along first direction D1, and by third incident light
111 ' are divided into the third light beam 143 of D2 in a second direction and the 4th light beam 144 along first direction D1.
Referring again to FIGS. 1, third reflection unit 150 includes reflecting mirror 151, reflecting mirror 152 and reflecting mirror 153.Reflecting mirror
151 reflex to the second light beam 142 on concave mirror 170 with third light beam 143 with parallel 170 optical axis of concave mirror；152 He of reflecting mirror
Reflecting mirror 153 reflexes to the first light beam 141 on concave mirror 170 with the 4th light beam 144 with parallel 170 optical axis of concave mirror.This reality
The optical axis for applying the concave mirror 170 of example is parallel to first direction D1, to facilitate the position of fine adjustment third reflection unit 150.
The light that concave mirror 170 can avoid femtosecond laser deforms, so that being parallel to the 141~the 4th light beam of the first light beam of its optical axis
144 focus on same point.
Regulating device 160 includes wedge in 141 optical path of the first light beam to 161 and is located at 142 optical path of the second light beam
On wedge to 162.By adjusting wedge to 161,162 thickness in optical path, the first light beam 141 and the are adjusted to realize
Two light beams 142 arrive the time interval of concave mirror 170.
Two-dimension spectrum device 100 further includes reflecting mirror 171, the first light beam the 141~the 4th for focusing concave mirror 170
Light beam 144 reflexes to the same position of sample 180.
The time interval of first light beam 141 and the second light beam 142 is usually between 0-120 femtosecond, therefore the maximum of the two
Optical path difference is only 36 microns.Due to a wedge to can to the range that light is postponed be 0-400 femtosecond, experiment or
By adjusting the angle of reflecting mirror 152 and reflecting mirror 153 in test process, so that the light of the second light beam 142 and the first light beam 141
Journey is equal or approximately equal.
Hollow angle mirror 131 in second reflection unit 130 of the present embodiment increases the second incident light 112 to beam splitting chip
140 light path, therefore another effect of the first reflection unit 120 in the present embodiment is to increase by 111 incidence of the first incident light
To the light path of beam splitting chip 140, so that the light path that the first incident light 111 is incident on beam splitting chip 140 arrives greater than the second incident light 112 and divides
The light path of beam piece 140, and then realize that third light beam 143 is incident on sample 180 after the first light beam 141.Therefore when hollow
D1 is moved to increase the light path of the first light beam 141 or along a first direction the opposite direction movement of D1 angle mirror 131 along a first direction
During light path to reduce the first light beam 141, the light path of the 4th light beam 144 as detection light does not change, advantageous in this way
Stability is measured in improving.
The first incident light 111 and the second incident light 112 in two-dimension spectrum device 100 of the invention are issued from laser
Same a branch of femtosecond laser, and the first light beam 141 and the second light beam 142 both are from the 4th incident light 112 ', 143 He of third light beam
4th light beam 144 both is from third incident light 111 ', and the first light beam 141 and the 4th light beam 144 share eyeglass, the second light after beam splitting
Beam 142 and third light beam 143 share eyeglass, therefore the phase of optical signal after the radiant light of sample and the interference of the 4th light beam 144
Knots modification is zero.Therefore eyeglass shake can be eliminated using beam splitting chip 110 and beam splitting chip 140 and shared eyeglass to change phase
Become, to improve the stability of two-dimension spectrum device 100.Two-dimension spectrum device of the invention is simultaneously not present to light progress diffraction,
Therefore to the spectrum of incident light, there is no restriction, and small to the loss of light；In addition device is simple, light weight and small in size.
Fig. 3 is the index path of the two-dimension spectrum device of second embodiment according to the present invention.It is essentially identical with Fig. 1, area
It is not, the first reflection unit 220 in two-dimension spectrum device 200 is a reflecting mirror, is used for 111 edge of the first incident light
First direction D1 reflection, to obtain third incident light 111 '.Since the light path of the first incident light 111 to beam splitting chip 140 is less than
Second incident light 112 arrives the light path of beam splitting chip 140, therefore the wedge in regulating device 160 is located at third to 161,162 and enters
Light 111 ' is penetrated in the optical path after beam splitting chip 140 transmits and reflects.
Fig. 4 is the index path of the two-dimension spectrum device of third embodiment according to the present invention.It is essentially identical with Fig. 1, area
It is not, the optical axis of concave mirror 170 and the angle of second direction D2 are not equal to 0 ° or 90 ° and in two-dimension spectrum device 300
Third reflection unit includes reflecting mirror 351 and reflecting mirror 352, and wherein reflecting mirror 351 is used for the second light beam 142 and third light beam
143 reflex on concave mirror 170 along the optical axis of concave mirror 170, and reflecting mirror 352 is used for the first light beam 141 and the 4th light beam 144
Optical axis along concave mirror 170 reflexes on concave mirror 170.By adjusting reflecting mirror 351,352 at a distance from beam splitting chip 140 and folder
Angle, so that the first light beam 141 and the second light beam 142 arrive the equivalent optical path or approximately equal of concave mirror 170.
Fig. 5 is the index path of the two-dimension spectrum device of the 4th embodiment according to the present invention.It is essentially identical with Fig. 1, area
It is not, the optical axis of the concave mirror 170 in two-dimension spectrum device 400 is parallel to second direction D2, and reflecting mirror 152,153 is used for will
D2 is reflexed on concave mirror 170 in a second direction for second light beam 142 and third light beam 143, and reflecting mirror 151 is by the first light beam 141
It is reflexed on concave mirror 170 with the 4th light beam 144 along first direction D1.
In other examples, the angle of first direction D1 and second direction D2 can be not equal to 90 °.
In other embodiments of the invention, it can also be replaced in above-described embodiment using the reflecting mirror of two exact verticals
Hollow angle mirror 131.
In other embodiments of the invention, can not have reflecting mirror 171, be carried out in test process to sample, it will
Sample 180 is directly placed at the focal point of concave mirror 170.
Focusing device of the invention is not limited to concave mirror 170, can also be that other can fill the focusing of parallel light focusing
It sets.
Regulating device 160 of the invention may include more or less than two wedges pair, for example, positioned at the first light beam 141 or
A wedge pair in the optical path of second light beam 142.
Although the present invention has been described by means of preferred embodiments, the present invention is not limited to described here
Embodiment, without departing from the present invention further include made various changes and variation.
Claims (9)
1. a kind of two-dimension spectrum device characterized by comprising
First beam splitting chip, for the light being incident on first beam splitting chip to be divided into the first incident light and the second incident light；
First reflection unit obtains third incident light for reflecting first incident light along first direction；
Second reflection unit, it is non-with the third incident light for reflecting to obtain second incident light in a second direction
The 4th coplanar incident light；
Second beam splitting chip, for being divided into the 4th incident light along the first light beam of the first direction and along the second party
To the second light beam, and for being divided into the third incident light along the third light beam of the second direction and along described first
4th light beam in direction；
Focusing device；
Third reflection unit, it is described poly- for first light beam to the 4th light beam to be reflected into along the optical axis of the focusing device
On coke installation, and make the light path of first light beam equal to the light path of second light beam；And
Regulating device is incident on the time interval of the focusing device for adjusting first light beam and the second light beam.
2. two-dimension spectrum device according to claim 1, which is characterized in that the third reflection unit includes:
First reflecting mirror, for second light beam and third light beam to be reflected into the focusing along the optical axis of the focusing device
On device；And
Second reflecting mirror and third reflecting mirror, for first light beam and the 4th light beam is anti-along the optical axis of the focusing device
It is mapped on the focusing device.
3. two-dimension spectrum device according to claim 2, which is characterized in that the optical axis of the focusing device parallel described the
One direction, second reflecting mirror and third mirror parallel.
4. two-dimension spectrum device according to claim 2, which is characterized in that the regulating device includes being located at described first
The first wedge pair in the optical path of light beam and/or the second wedge pair in the optical path of second light beam.
5. two-dimension spectrum device according to any one of claim 1 to 4, which is characterized in that second reflection unit
Include:
Hollow angle mirror, second incident light separated for receiving first beam splitting chip；And
4th reflecting mirror, for the emergent light of the hollow angle mirror to be reflexed to second beam splitting chip along the second direction.
6. two-dimension spectrum device according to any one of claim 1 to 4, which is characterized in that the first direction is vertical
In the second direction, first incident light is parallel to the second direction, and second incident light is parallel to described
One direction.
7. two-dimension spectrum device according to claim 6, which is characterized in that first reflection unit includes successively reflecting
The 5th reflecting mirror, the 6th reflecting mirror and the 7th reflecting mirror of first incident light, the 5th reflecting mirror with described first point
Beam piece is vertical, and the 6th reflecting mirror is vertical with the 5th reflecting mirror, and the 7th reflecting mirror and the 5th reflecting mirror are flat
Row.
8. two-dimension spectrum device according to any one of claim 1 to 4, which is characterized in that the focusing device is recessed
Face mirror.
9. two-dimension spectrum device according to any one of claim 1 to 4, which is characterized in that the two-dimension spectrum device
It further include the 8th reflecting mirror, the first light beam to the 4th light beam focused for reflecting the focusing device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510535266.0A CN106483076B (en) | 2015-08-27 | 2015-08-27 | Two-dimension spectrum device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510535266.0A CN106483076B (en) | 2015-08-27 | 2015-08-27 | Two-dimension spectrum device |
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| CN106483076B true CN106483076B (en) | 2019-10-25 |
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| US9001320B2 (en) * | 2010-08-16 | 2015-04-07 | The University Of Chicago | Real-time mapping of electronic structure with single-shot two-dimensional electronic spectroscopy |
| CN102723660B (en) * | 2012-05-02 | 2014-11-26 | 清华大学 | Electro-optic Q-switched pulse laser device with repeat frequency being variable in wide range |
| CN103091260A (en) * | 2013-02-01 | 2013-05-08 | 中国科学院化学研究所 | System for controlling femtosecond laser two-dimensional infrared spectroscopy device |
| CN204439547U (en) * | 2014-12-22 | 2015-07-01 | 中国科学院苏州生物医学工程技术研究所 | A kind of super-resolution microscope fluorescent material being carried out to imaging |
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