CN109905583A - Multi-angle illumination ultrahigh speed imaging device - Google Patents
Multi-angle illumination ultrahigh speed imaging device Download PDFInfo
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- CN109905583A CN109905583A CN201910236367.6A CN201910236367A CN109905583A CN 109905583 A CN109905583 A CN 109905583A CN 201910236367 A CN201910236367 A CN 201910236367A CN 109905583 A CN109905583 A CN 109905583A
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Abstract
The embodiment of the present invention provides a kind of multi-angle illumination ultrahigh speed imaging device, belongs to ultrahigh speed technical field of imaging.It include: wide range light-pulse generator, time delay device, multi-angle illuminating device, lens group and charge-coupled device；Wherein, object under test is placed in lens group；The single pulse light that wide range light-pulse generator issues is after time delay device, it is divided into the frequency component of different moments, after the frequency component of different moments passes through multi-angle illuminating device, the object under test in lens group is passed through according to different angles, it focuses on the different location of charge-coupled device, charge-coupled device is for recording object under test in the power spectral information of different moments.Since the power spectral information of object under test different moments is mapped on the different location of charge-coupled device by the method that multi-angle illumination can be used, and then data collected on different location are handled, so that strength information and phase information of the object under test under ultrahigh speed motion state can be obtained.
Description
Technical field
The present embodiments relate to ultrahigh speed technical field of imaging more particularly to a kind of multi-angle illumination ultrahigh speed imaging dresses
It sets.
Background technique
In fields such as science, industry, national defence, the energy and medicine, high speed optical imaging is object observing object dynamic process
Indispensable technology.The parameter for measuring optical system time performance superiority and inferiority is imaging frame rate and time for exposure.It is traditional at
For picture system usually using CCD or CMOS as sensor devices, imaging frame rate is limited by sensitivity and the influence of the time of integration, leads to
Normal only up to MHz, this is far from being enough for the object of ultrahigh speed movement.It is existing in order to capture this superfast movement
As the imaging frame rate of system is required in THZ or more, and the time for exposure requires in hundred femtosecond magnitudes.
In the related art, imaging method used in ultrahigh speed imaging system is broadly divided into two classes: pumping detecting probe method
And single exposure method.Wherein, pumping detecting probe method have some limitations, it be only used for capture occur repeatedly it is ultrafast
Event.However, many ultrafast phenomenas are not reproducible.For example, the light in irreversible crystallochemical reaction, living tissue scatter,
Impact in Laser Induced Damage involves chaotic laser light dynamics etc..Therefore, in terms of detecting non-repetitive ultrafast phenomena, pumping
Detecting probe method can not be applicable in.And the appearance of single exposure method, the exactly limitation in order to overcome pumping detecting probe method.Single
The representative art of exposure includes: the full light mapping imaging (STAMP) of serial time and the multichannel exposure based on frequency identification algorithm
It is imaged (FRAME).Although both have reached the requirement of THZ, hundred femtoseconds at system in terms of time performance, increase significantly
The complexity of imaging system is added.In addition, complex value object cannot be imaged in they, i.e., do not have phase-detection ability, and
Phase information is particularly significant in the research fields such as biology and physics.
Summary of the invention
To solve the above-mentioned problems, the embodiment of the present invention provides one kind and overcomes the above problem or at least be partially solved
State the multi-angle illumination ultrahigh speed imaging device of problem.
One side according to an embodiment of the present invention provides a kind of multi-angle illumination ultrahigh speed imaging device, comprising:
Wide range light-pulse generator, time delay device, multi-angle illuminating device, lens group and charge-coupled device；Wherein, determinand
Body is placed in lens group；The single pulse light that wide range light-pulse generator issues is divided into different moments after time delay device
Frequency component, the frequency components of different moments according to different angles by passing through in lens group after multi-angle illuminating device
Object under test, focus on the different location of charge-coupled device, charge-coupled device is for recording object under test in difference
The power spectral information at moment.
Multi-angle illumination ultrahigh speed imaging device provided in an embodiment of the present invention, will by using the method for multi-angle illumination
The power spectral information of object under test different moments is mapped on the different location of charge-coupled device, and then to charge-coupled device
Different location on collected data handled, thus can be obtained object under test under ultrahigh speed motion state intensity letter
Breath and phase information.
It should be understood that above general description and following detailed description be it is exemplary and explanatory, can not
Limit the embodiment of the present invention.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of structural schematic diagram of multi-angle illumination ultrahigh speed imaging device provided in an embodiment of the present invention；
Fig. 2 is a kind of structural schematic diagram of multi-angle illumination ultrahigh speed imaging device provided in an embodiment of the present invention；
Fig. 3 is a kind of structural schematic diagram of multi-angle illumination ultrahigh speed imaging device provided in an embodiment of the present invention.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
For the problems in the relevant technologies, the embodiment of the invention provides a kind of multi-angle illumination ultrahigh speed imaging devices.
Referring to Fig. 1, the device include: wide range light-pulse generator 101, time delay device 102, multi-angle illuminating device 103, lens group 104 and
Charge-coupled device 105；Wherein, object under test is placed in lens group 104；The single arteries and veins that wide range light-pulse generator 101 issues
It washes off after time delay device 102, is divided into the frequency component of different moments, the frequency component of different moments is shone by multi-angle
After bright device 103, the object under test in lens group 104 is passed through according to different angles, focuses on charge-coupled device 105 not
With on position, charge-coupled device 105 is for recording object under test in the power spectral information of different moments.
In Fig. 1, lens group 104 is that the black columnar object comprising two lens, between two lens is as to be measured
Object.Lens group 104 can also include three or more lens in actual implementation, and the embodiment of the present invention does not limit this specifically
It is fixed.It should be noted that the sum of lens is even number in lens group 104.
Multi-angle illumination ultrahigh speed imaging device provided in an embodiment of the present invention, will by using the method for multi-angle illumination
The power spectral information of object under test different moments is mapped on the different location of charge-coupled device, and then to charge-coupled device
Different location on collected data handled, thus can be obtained object under test under ultrahigh speed motion state intensity letter
Breath and phase information.
Content based on the above embodiment, as a kind of alternative embodiment, lens group 104 includes that the first lens and second are saturating
Mirror, object under test are placed between the first lens and the second lens.Wherein, the case where lens group 104 includes two lens can
To refer to Fig. 1.
Content based on the above embodiment, as a kind of alternative embodiment, lens group 104 includes three or more lens；
Object under test is placed between the two of them lens in lens group 104, and other lens in lens group 104 are placed wherein
The left side or the right of two lens.Wherein, the case where other lens in lens group 104 are placed on the left side of two of them lens
It can refer to Fig. 2, the case where other lens in lens group 104 are placed on the left side of two of them lens can refer to Fig. 3.
Content based on the above embodiment, as a kind of alternative embodiment, time delay device 102 is time domain dispersor；Time domain
Dispersor obtains the frequency component of different moments for broadening in time to single pulse light.Specifically, when use
It is to broaden wide range pulse in time that domain Dispersive Devices, which carry out time delay, and pulse is after broadening, different frequency components
At the time of corresponding to different, and then object under test is illuminated using different frequency components, ultrahigh speed imaging can be realized.Wherein,
Time domain dispersor can be optical fiber, and due to the component for the different frequency for including in single pulse light, transmission speed is in a fiber
Different, thus in the output port of optical fiber, the component of different frequency in single pulse light can be in different moments from output port
Output, so as to obtain the frequency component of different moments.
Content based on the above embodiment, as a kind of alternative embodiment, time delay device 102 includes multiple and different output
Port；Wherein, the frequency component that single pulse light passes through different output port exportable different moments.Specifically, single arteries and veins
It washes off when propagating, can serially pass through each output port.Since single pulse light one can be exported from each output port
The component of a frequency, and there are optical path difference between different output ports, optical path difference has corresponded to time delays, namely by more
The frequency component of a output port available different moments.
Content based on the above embodiment, as a kind of alternative embodiment, charge-coupled device 105, in different positions
Set power spectrum of the record object under test in different moments, by Phase Retrieve Algorithm to the power spectrum of different moments at
Reason, obtains object under test in the power spectral information of different moments.
Specifically, by taking lens group 104 includes two lens as an example, after time delay device 102, the illumination of different moments
The frequency component of light namely different moments can be emitted to free space from different output ports, by lens group 104
After one lens (lens play collimating effect), different output can be collimated into directional light, illuminate at different angles to be measured
Object.After object under test, the incident light for carrying the different angle of object information can be by second lens in lens group 104
It focuses on the different location of charge-coupled device 105.At this point, the letter recorded on the different location of charge-coupled device 105
Breath is the power spectrum of object under test different moments.It is collected to charge-coupled device 105 by using Phase Retrieve Algorithm
Power spectrum is handled, and the power spectral information of object under test different moments can be obtained.
The apparatus embodiments described above are merely exemplary, wherein unit can be as illustrated by the separation member
Or may not be and be physically separated, component shown as a unit may or may not be physical unit, i.e.,
It can be located in one place, or may be distributed over multiple network units.It can select according to the actual needs therein
Some or all of the modules achieves the purpose of the solution of this embodiment.Those of ordinary skill in the art are not paying creative labor
In the case where dynamic, it can understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each embodiment can
It realizes by means of software and necessary general hardware platform, naturally it is also possible to pass through hardware.Based on this understanding, on
Stating technical solution, substantially the part that contributes to existing technology can be embodied in the form of software products in other words, should
Computer software product may be stored in a computer readable storage medium, such as ROM/RAM, magnetic disk, CD, including several fingers
It enables and using so that a computer equipment (can be personal computer, server or the network equipment etc.) executes each implementation
Method described in certain parts of example or embodiment.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (6)
1. a kind of multi-angle illumination ultrahigh speed imaging device characterized by comprising wide range light-pulse generator, time delay device, polygonal
Spend lighting device, lens group and charge-coupled device；Wherein, object under test is placed in the lens group；The wide range arteries and veins
The single pulse light of source sending is washed off after the time delay device, is divided into the frequency component of different moments, different moments
After frequency component passes through the multi-angle illuminating device, the object under test in the lens group is passed through according to different angles, is gathered
Coke is on the different location of the charge-coupled device, and the charge-coupled device is for recording the object under test when different
The power spectral information at quarter.
2. the apparatus according to claim 1, which is characterized in that the lens group includes the first lens and the second lens, institute
Object under test is stated to be placed between first lens and second lens.
3. the apparatus according to claim 1, which is characterized in that the lens group includes three or more lens；It is described to
It surveys object to be placed between the two of them lens in the lens group, other lens in the lens group are placed on described
The left side or the right of two of them lens.
4. the apparatus according to claim 1, which is characterized in that the time delay device is time domain dispersor；The time domain color
It dissipates device and obtains the frequency component of different moments for broadening in time to the single pulse light.
5. the apparatus according to claim 1, which is characterized in that the time delay device includes multiple and different output port；
Wherein, the frequency component that the single pulse light passes through different output port exportable different moments.
6. the apparatus according to claim 1, which is characterized in that the charge-coupled device, for remembering on different location
The object under test is recorded in the power spectrum of different moments, is handled by power spectrum of the Phase Retrieve Algorithm to different moments,
The object under test is obtained in the power spectral information of different moments.
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