CN108871220A - A kind of time-phase displacement device - Google Patents
A kind of time-phase displacement device Download PDFInfo
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- CN108871220A CN108871220A CN201810425874.XA CN201810425874A CN108871220A CN 108871220 A CN108871220 A CN 108871220A CN 201810425874 A CN201810425874 A CN 201810425874A CN 108871220 A CN108871220 A CN 108871220A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/16—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge
- G01B11/161—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by interferometric means
- G01B11/162—Measuring arrangements characterised by the use of optical techniques for measuring the deformation in a solid, e.g. optical strain gauge by interferometric means by speckle- or shearing interferometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B9/00—Measuring instruments characterised by the use of optical techniques
- G01B9/02—Interferometers
- G01B9/02001—Interferometers characterised by controlling or generating intrinsic radiation properties
- G01B9/0201—Interferometers characterised by controlling or generating intrinsic radiation properties using temporal phase variation
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Abstract
This application discloses a kind of time-phase displacement devices, including：Drive module and at least three phase shift modules；The medium refraction index of at least three phase shift module is n, if at least three phase shift module is arranged from big to small by thickness, the thickness difference between two neighboring phase shift module isWherein, Δ φ is the phaseshift step size of the time-phase displacement device, and λ is optical source wavelength；Drive module introduces different phase-shift phases in different moments by the position of change at least three phase shift module.The application is based on the time-phase displacement device for being provided with the different phase shift module of at least three thickness, phase-shift phase can be accurately introduced in time-phase displacement process, effectively avoid the problem that there are errors for the characteristics bring such as piezoelectric ceramics creep properties, hysteresis, non-linear introducing phase-shift phase.
Description
Technical field
This application involves phase-shifting technique field more particularly to a kind of time-phase displacement devices.
Background technique
Digital speckle interference technology is the optical means that the deformation on a kind of pair of rough object surface measures.It is shone in laser
It penetrates in the speckle field of rough object surface generation and introduces another coherent beam, form the new interference speckle comprising measured object information
?.When object such as is subjected to displacement, deforms or vibrates at the variation, interference speckle field can also change therewith, change us according to this
The deformation of object can be measured.
Since the deformation information of object is directly related with phase distribution, and it is speckle that digital speckle interference technology is collected
The intensity distribution of figure it is therefore possible to use time-phase displacement technology is extracted from speckle pattern obtains phase distribution information, and then obtains
The deformation information of object.
In time-phase displacement technology, realize that the key of phase shift is time-phase displacement device.Currently, common time-phase displacement device is pressure
Electroceramics.Piezoelectric ceramics pushes the mobile light to change reference light in digital speckle interference optical path of plane mirror as driving element
Journey to introduce fixed phase difference between the every width speckle pattern acquired in time series, and is mentioned using specific algorithm
Take phase distribution.
But since piezoelectric ceramics has the characteristics such as creep properties, hysteresis, non-linear, lead to the driving of piezoelectric ceramics
Journey generates error, so that there are errors for the phase-shift phase of dephasing processes introducing.
Summary of the invention
The embodiment of the present application provides a kind of time-phase displacement device, introduces phase to solve existing piezoelectric ceramics time-phase displacement device
Inaccurate problem is measured in shifting.
The embodiment of the present application provides a kind of time-phase displacement device, including：Drive module and at least three phase shift modules；
The medium refraction index of at least three phase shift module be n, if will at least three phase shift module press thickness from
Minispread is arrived greatly, and the thickness difference between two neighboring phase shift module isWherein, Δ φ is the time phase
The phaseshift step size of device is moved, λ is optical source wavelength；
Drive module introduces different phase shifts in different moments by the position of change at least three phase shift module
Amount.
Optionally, the phase shift step number of the time-phase displacement device is 4, phaseshift step sizeWhen, the time-phase displacement device packet
Include four phase shift modules：First phase shift module, the second phase shift module, third phase shift module and the 4th phase shift module；
Wherein, the thickness size of four phase shift modules is：First phase shift module<Second phase shift module<
The third phase shift module<4th phase shift module；
Thickness difference between first phase shift module and second phase shift module isDescribed second
Thickness difference between phase shift module and the third phase shift module isThe third phase shift module and described
Thickness difference between four phase shift modules is
Optionally, the material for constituting the phase shift module is the crystalline material for not absorbing laser.
Optionally, the crystalline material includes one of the following：
Quartz glass, tempered glass, crystal, jewel.
Optionally, at least three phase shift module constitutes disc-shaped structure；
The drive module is by controlling at least three phase shift modules rotation, to change at least three phases shifting formwork
The position of block.
The embodiment of the present application also provides a kind of time-phase displacement devices, including：Drive module and at least three phase shift modules；
At least three phase shift module with a thickness of L, if by least three phase shift module by medium refraction index from
Minispread is arrived greatly, and the medium refraction index difference between two neighboring phase shift module isWherein, Δ φ is the time
The phaseshift step size of phase-shifter, λ are optical source wavelength；
Drive module introduces different phase shifts in different moments by the position of change at least three phase shift module
Amount.
Optionally, the phase shift step number of the time-phase displacement device is 4, phaseshift step sizeWhen, the time-phase displacement device packet
Include four phase shift modules：First phase shift module, the second phase shift module, third phase shift module and the 4th phase shift module；
Wherein, the medium refraction index size of four phase shift modules is：First phase shift module<Second phase shift
Module<The third phase shift module<4th phase shift module；
Medium refraction index difference between first phase shift module and second phase shift module isDescribed
Medium refraction index difference between two phase shift modules and the third phase shift module isThe third phase shift module and institute
The medium refraction index difference stated between the 4th phase shift module is
Optionally, the material for constituting the phase shift module is the crystalline material for not absorbing laser.
Optionally, the crystalline material includes one of the following：
Quartz glass, tempered glass, crystal, jewel.
Optionally, at least three phase shift module constitutes disc-shaped structure；
The drive module is by controlling at least three phase shift modules rotation, to change at least three phases shifting formwork
The position of block.
At least one above-mentioned technical solution that the embodiment of the present application uses can reach following beneficial effect：
Time-phase displacement device includes drive module and at least three phase shift modules, the medium refraction of at least three phase shift module
Rate is n, if at least three phase shift module is arranged from big to small by thickness, the thickness difference between two neighboring phase shift module isWherein, Δ φ is the phaseshift step size of time-phase displacement device, and λ is optical source wavelength；Drive module should by changing
The position of at least three phase shift modules introduces different phase-shift phases in different moments.It is different based at least three thickness are provided with
Phase shift module time-phase displacement device, can accurately introduce phase-shift phase in dephasing processes, effectively avoid piezoelectric ceramics creep properties,
The characteristics bring such as hysteresis, non-linear, which introduces phase-shift phase, has error.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present application for explaining the application.In the accompanying drawings：
Fig. 1 is a kind of structural schematic diagram for the time-phase displacement device that can be realized three step phase shifts provided by the embodiments of the present application；
Thickness gradient figure of the Fig. 2 between the first phase shift module, the second phase shift module and third phase shift module；
Fig. 3 is a kind of structural schematic diagram for the time-phase displacement device that can be realized four-step phase-shifting provided by the embodiments of the present application；
Thickness ladder of the Fig. 4 between the first phase shift module, the second phase shift module, third phase shift module and the 4th phase shift module
Degree figure；
Fig. 5 is the structural representation for the time-phase displacement device that another kind provided by the embodiments of the present application can be realized three step phase shifts
Figure；
Medium refraction index gradient map of the Fig. 6 between the first phase shift module, the second phase shift module and third phase shift module；
Fig. 7 is the structural representation for the time-phase displacement device that another kind provided by the embodiments of the present application can be realized four-step phase-shifting
Figure；
Medium folding of the Fig. 8 between the first phase shift module, the second phase shift module, third phase shift module and the 4th phase shift module
Penetrate rate gradient map.
Specific embodiment
Technical scheme is clearly and completely retouched below with reference to the application specific embodiment and corresponding attached drawing
It states.Obviously, the described embodiments are only a part but not all of the embodiments of the present application.Based in the application
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts,
It shall fall in the protection scope of this application.
Below in conjunction with attached drawing, the technical scheme provided by various embodiments of the present application will be described in detail.
Embodiment 1
The embodiment of the present application provides a kind of time-phase displacement device, including：Drive module and at least three phase shift modules；
The medium refraction index of at least three phase shift module be n, if by least three phase shift module by thickness from greatly to
Minispread, the thickness difference between two neighboring phase shift module areWherein, Δ φ is the phase of time-phase displacement device
Walk is long, and λ is optical source wavelength；
Drive module introduces different phase-shift phases in different moments by the position of change at least three phase shift module.
In practical application, when two-beam is interfered, the phase distribution of speckle interference figure is：
Wherein, λ is optical source wavelength, and n is medium refraction index, and β is phase constant, and geometric path of the L between two-beam is poor.
By being inserted with the time-phase displacement device of the phase shift module of at least three different-thickness in the optical path, according to difference
The phase shift module of thickness introduces different phase-shift phases.
According to different phase shifting methods, the number of phase shift module and thickness can be different in time-phase displacement device.
Two different time-phase displacement devices are described in detail below.
The first, can be realized the time-phase displacement device of three step phase shifts：
The embodiment of the present application provides a kind of time-phase displacement device, including：Drive module and three phase shift modules：First phase shift
Module, the second phase shift module and third phase shift module；
The phase shift step number of time-phase displacement device is 3, phaseshift step size
The medium refraction index of three phase shift modules is n, and the thickness size of three phase shift modules is：First phase shift module<The
Two phase shift modules<Third phase shift module；
Thickness difference between first phase shift module and the second phase shift module isSecond phase shift module and
Thickness difference between three phase shift modules is
Drive module introduces different phase-shift phases in different moments by the position of three phase shift modules of change.
Fig. 1 is a kind of structural schematic diagram for the time-phase displacement device that can be realized three step phase shifts provided by the embodiments of the present application.
As shown in Figure 1, time-phase displacement device 100 includes drive module 101 and three phase shift modules：First phase shift module 102,
Second phase shift module 103 and third phase shift module 104；
Wherein, the medium refraction index of three phase shift modules be n, the first phase shift module 102 with a thickness of L0, the second phase shifting formwork
Block 103 with a thickness of L0+ΔL1, third phase shift module 104 with a thickness of L0+2ΔL1,
Thickness gradient figure of the Fig. 2 between the first phase shift module, the second phase shift module and third phase shift module.
As can be seen from FIG. 2,
Laser is by the second phase shift module 103, compared with laser is by the first phase shift module 102, generates same distance Δ L1
Air and phase shift module between the phase difference φ that is formed1：
Laser is by third phase shift module 104, compared with laser is by the first phase shift module 102, generates 2 Δ L of same distance1
Air and phase shift module between the phase difference φ that is formed2：
It follows that being based on time-phase displacement device 100, drive module 101 is by changing the first phase shift module 102, the second phase
The position of shifting formwork block 103 and third phase shift module 104, so that laser passes sequentially through the first phase shift module 102, the second phase shift module
103 and when third phase shift module 104, can successively introduce 0,Phase-shift phase, realize three step phase shifts.
Second, it can be realized the time-phase displacement device of four-step phase-shifting：
The embodiment of the present application provides a kind of time-phase displacement device, including：Drive module and four phase shift modules：First phase shift
Module, the second phase shift module, third phase shift module and the 4th phase shift module；
The phase shift step number of time-phase displacement device is 4, phaseshift step size
The medium refraction index of four phase shift modules is n, and the thickness size of four phase shift modules is：First phase shift module<The
Two phase shift modules<Third phase shift module<4th phase shift module；
Thickness difference between first phase shift module and the second phase shift module isSecond phase shift module and
Thickness difference between three phase shift modules isThickness difference between third phase shift module and the 4th phase shift module is
Drive module introduces different phase-shift phases in different moments by the position of four phase shift modules of change.
Fig. 3 is a kind of structural schematic diagram for the time-phase displacement device that can be realized four-step phase-shifting provided by the embodiments of the present application.
As shown in figure 3, time-phase displacement device 300 includes drive module 301 and four phase shift modules：First phase shift module 302,
Second phase shift module 303, third phase shift module 304 and the 4th phase shift module 305；
Wherein, the medium refraction index of four phase shift modules be n, the first phase shift module 302 with a thickness of L0', the second phase shift
Module 303 with a thickness of L0'+ΔL2, third phase shift module 304 with a thickness of L0'+2ΔL2, the thickness of the 4th phase shift module 305
For L0'+3ΔL2,
Thickness ladder of the Fig. 4 between the first phase shift module, the second phase shift module, third phase shift module and the 4th phase shift module
Degree figure.
As can be seen from FIG. 4,
Laser is by the second phase shift module 303, compared with laser is by the first phase shift module 302, generates same distance Δ L2
Air and phase shift module between the phase difference φ that is formed1：
Laser is by third phase shift module 304, compared with laser is by the first phase shift module 302, generates 2 Δ L of same distance2
Air and phase shift module between the phase difference φ that is formed2：
Laser is by the 4th phase shift module 305, compared with laser is by the first phase shift module 302, generates 3 Δ L of same distance2
Air and phase shift module between the phase difference φ that is formed3：
It follows that being based on time-phase displacement device 300, drive module 301 is by changing the first phase shift module 302, the second phase
The position of shifting formwork block 303, third phase shift module 304 and the 4th phase shift module 305, so that laser passes sequentially through the first phase shift module
302, when the second phase shift module 303, third phase shift module 304 and four phase shift modules 305, can successively introduce 0,π、Phase-shift phase, realize four-step phase-shifting.
It should be noted that above-mentioned L0And L0' size can be identical, can not also be identical, specific value can be according to reality
Border situation determines, is not specifically limited here.
In the embodiment of the present application, the material for constituting phase shift module is the crystalline material for not absorbing laser.
Specifically, crystalline material includes one of the following：
Quartz glass, tempered glass, crystal, jewel.
In the embodiment of the present application, at least three phase shift modules constitute disc-shaped structure；
Drive module is by control at least three phase shift modules rotation, to change the position of at least three phase shift modules.
Still by taking above-mentioned Fig. 3 as an example, as shown in figure 3, the first phase shift module 302, the second phase shift module 303, third phase shifting formwork
Block 304 and the 4th phase shift module 305 constitute disc-shaped structure, and drive module passes through control the first phase shift module 302, the second phase shift
Module 303, third phase shift module 304 and the 4th phase shift module 305 rotation so that laser pass sequentially through the first phase shift module 302,
When the second phase shift module 303, third phase shift module 304 and four phase shift modules 305, can successively introduce 0,π、Phase
Shifting amount realizes four-step phase-shifting.
The technical solution that the embodiment of the present application is recorded, time-phase displacement device include drive module and at least three phase shift modules,
The medium refraction index of at least three phase shift module is n, if at least three phase shift module is arranged from big to small by thickness, phase
Thickness difference between adjacent two phase shift modules isWherein, Δ φ is the phaseshift step size of time-phase displacement device, and λ is
Optical source wavelength；Drive module introduces different phase-shift phases in different moments by the position of change at least three phase shift module.
Based on the time-phase displacement device for being provided with the different phase shift module of at least three thickness, phase shift can be accurately introduced in dephasing processes
Amount effectively avoids the problem that there are errors for the characteristics bring such as piezoelectric ceramics creep properties, hysteresis, non-linear introducing phase-shift phase.
Embodiment 2
The embodiment of the present application provides a kind of time-phase displacement device, including：Drive module and at least three phase shift modules；
At least three phase shift module with a thickness of L, if by least three phase shift module by medium refraction index from greatly to
Minispread, the medium refraction index difference between two neighboring phase shift module areWherein, Δ φ is time-phase displacement device
Phaseshift step size, λ are optical source wavelength；
Drive module introduces different phase-shift phases in different moments by the position of change at least three phase shift module.
In practical application, when two-beam is interfered, the phase distribution of speckle interference figure is：
Wherein, λ is optical source wavelength, and n is medium refraction index, and β is phase constant, and geometric path of the L between two-beam is poor.
It is identical by being inserted at least three thickness in the optical path, but the different phase shift module of medium refraction index
Time-phase displacement device introduces different phase-shift phases according to the phase shift module of different medium refractive index.
According to different phase shifting methods, the number of phase shift module and medium refraction index can be different in time-phase displacement device.
Two different time-phase displacement devices are described in detail below.
The first, can be realized the time-phase displacement device of three step phase shifts：
The embodiment of the present application provides a kind of time-phase displacement device, including：Drive module and three phase shift modules：First phase shift
Module, the second phase shift module and third phase shift module；
The phase shift step number of time-phase displacement device is 3, phaseshift step size
Three phase shift modules with a thickness of L, the medium refraction index size of three phase shift modules is：First phase shift module<The
Two phase shift modules<Third phase shift module；
Medium refraction index difference between first phase shift module and the second phase shift module isSecond phase shift module and
Medium refraction index difference between third phase shift module is
Drive module introduces different phase-shift phases in different moments by the position of three phase shift modules of change.
Fig. 5 is the structural representation for the time-phase displacement device that another kind provided by the embodiments of the present application can be realized three step phase shifts
Figure.
As shown in figure 5, time-phase displacement device 500 includes drive module 501 and three phase shift modules：First phase shift module 502,
Second phase shift module 503 and third phase shift module 504；
Wherein, three phase shift modules with a thickness of L1, the medium refraction index of the first phase shift module 502 is n0, the second phase shifting formwork
The medium refraction index of block 503 is n0+Δn1, the medium refraction index of third phase shift module 504 is n0+2Δn1,
Medium refraction index gradient map of the Fig. 6 between the first phase shift module, the second phase shift module and third phase shift module.
As can be seen from FIG. 6,
Laser is by the second phase shift module 503, compared with laser is by the first phase shift module 502, generates medium refraction index
n0With medium refraction index n0+Δn1Between the phase difference φ that is formed1：
Laser is by third phase shift module 504, compared with laser is by the first phase shift module 502, generates medium refraction index
n0With medium refraction index n0+2Δn1Between the phase difference φ that is formed2：
It follows that being based on time-phase displacement device 500, drive module 501 is by changing the first phase shift module 502, the second phase
The position of shifting formwork block 503 and third phase shift module 504, so that laser passes sequentially through the first phase shift module 502, the second phase shift module
503 and when third phase shift module 504, can successively introduce 0,Phase-shift phase, realize three step phase shifts.
Second, it can be realized the time-phase displacement device of four-step phase-shifting：
The embodiment of the present application provides a kind of time-phase displacement device, including：Drive module and four phase shift modules：First phase shift
Module, the second phase shift module, third phase shift module and the 4th phase shift module；
The phase shift step number of time-phase displacement device is 4, phaseshift step size
Four phase shift modules with a thickness of L, the medium refraction index size of four phase shift modules is：First phase shift module<The
Two phase shift modules<Third phase shift module<4th phase shift module；
Medium refraction index difference between first phase shift module and the second phase shift module isSecond phase shift module and
Medium refraction index difference between third phase shift module isMedium between third phase shift module and the 4th phase shift module
Refringence is
Drive module introduces different phase-shift phases in different moments by the position of four phase shift modules of change.
Fig. 7 is the structural representation for the time-phase displacement device that another kind provided by the embodiments of the present application can be realized four-step phase-shifting
Figure.
As shown in fig. 7, time-phase displacement device 700 includes drive module 701 and four phase shift modules：First phase shift module 702,
Second phase shift module 703, third phase shift module 704 and the 4th phase shift module 705；
Wherein, four phase shift modules with a thickness of L2, the medium refraction index of the first phase shift module 702 is n0', the second phase shift
The medium refraction index of module 703 is n0'+Δn2, the medium refraction index of third phase shift module 704 is n0'+2Δn2, the 4th phase shift
The medium refraction index of module 705 is n0'+3Δn2,
Medium folding of the Fig. 8 between the first phase shift module, the second phase shift module, third phase shift module and the 4th phase shift module
Penetrate rate gradient map.
As can be seen from FIG. 8,
Laser is by the second phase shift module 703, compared with laser is by the first phase shift module 702, generates medium refraction index
n0' and medium refraction index n0'+Δn2Between the phase difference φ that is formed1：
Laser is by third phase shift module 704, compared with laser is by the first phase shift module 702, generates medium refraction index
n0' and medium refraction index n0'+2Δn2Between the phase difference φ that is formed2：
Laser is by the 4th phase shift module 705, compared with laser is by the first phase shift module 702, generates medium refraction index
n0' and medium refraction index n0'+3Δn2Between the phase difference φ that is formed3：
It follows that being based on time-phase displacement device 700, drive module 701 is by changing the first phase shift module 702, the second phase
The position of shifting formwork block 703, third phase shift module 704 and the 4th phase shift module 705, so that laser passes sequentially through the first phase shift module
702, when the second phase shift module 703, third phase shift module 704 and four phase shift modules 705, can successively introduce 0,π、
Phase-shift phase, realize four-step phase-shifting.
It should be noted that above-mentioned L1And L2Size can be identical, can not also be identical；Above-mentioned n0And n0' size can
It, can not also be identical with identical；L1、L2、n0、n0' specific value can not do specific limit here determines according to actual conditions
It is fixed.
In the embodiment of the present application, the material for constituting phase shift module is the crystalline material for not absorbing laser.
Specifically, crystalline material includes one of the following：
Quartz glass, tempered glass, crystal, jewel.
In the embodiment of the present application, at least three phase shift modules constitute disc-shaped structure；
Drive module is by control at least three phase shift modules rotation, to change the position of at least three phase shift modules.
Still by taking above-mentioned Fig. 7 as an example, as shown in fig. 7, the first phase shift module 702, the second phase shift module 703, third phase shifting formwork
Block 704 and the 4th phase shift module 705 constitute disc-shaped structure, and drive module passes through control the first phase shift module 702, the second phase shift
Module 703, third phase shift module 704 and the 4th phase shift module 705 rotation so that laser pass sequentially through the first phase shift module 702,
When the second phase shift module 703, third phase shift module 704 and four phase shift modules 705, can successively introduce 0,π、Phase
Shifting amount realizes four-step phase-shifting.
The technical solution that the embodiment of the present application is recorded, time-phase displacement device include drive module and at least three phase shift modules,
At least three phase shift module with a thickness of L, if at least three phase shift module is arranged from big to small by medium refraction index, phase
Medium refraction index difference between adjacent two phase shift modules isWherein, Δ φ is the phaseshift step size of time-phase displacement device, λ
For optical source wavelength；Drive module introduces different phase shifts in different moments by the position of change at least three phase shift module
Amount.It, can be in phase based on the time-phase displacement device for being provided with the phase shift module that at least three thickness are identical but medium refraction index is different
It moves past journey and accurately introduces phase-shift phase, the characteristics bring such as piezoelectric ceramics creep properties, hysteresis, non-linear is effectively avoided to introduce phase
There is error in shifting amount.
It should be understood by those skilled in the art that, the embodiment of the present invention can provide as method, system or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the present invention
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the present invention, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The present invention be referring to according to the method for the embodiment of the present invention, the process of equipment (system) and computer program product
Figure and/or block diagram describe.It should be understood that every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or block diagram or
The function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device, so that counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
In a typical configuration, calculating equipment includes one or more processors (CPU), input/output interface, net
Network interface and memory.
Memory may include the non-volatile memory in computer-readable medium, random access memory (RAM) and/or
The forms such as Nonvolatile memory, such as read-only memory (ROM) or flash memory (flash RAM).Memory is computer-readable medium
Example.
Computer-readable medium includes permanent and non-permanent, removable and non-removable media can be by any method
Or technology come realize information store.Information can be computer readable instructions, data structure, the module of program or other data.
The example of the storage medium of computer includes, but are not limited to phase change memory (PRAM), static random access memory (SRAM), moves
State random access memory (DRAM), other kinds of random access memory (RAM), read-only memory (ROM), electric erasable
Programmable read only memory (EEPROM), flash memory or other memory techniques, read-only disc read only memory (CD-ROM) (CD-ROM),
Digital versatile disc (DVD) or other optical storage, magnetic cassettes, tape magnetic disk storage or other magnetic storage devices
Or any other non-transmission medium, can be used for storage can be accessed by a computing device information.As defined in this article, it calculates
Machine readable medium does not include temporary computer readable media (transitory media), such as the data-signal and carrier wave of modulation.
It should also be noted that, the terms "include", "comprise" or its any other variant are intended to nonexcludability
It include so that the process, method, commodity or the equipment that include a series of elements not only include those elements, but also to wrap
Include other elements that are not explicitly listed, or further include for this process, method, commodity or equipment intrinsic want
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including described want
There is also other identical elements in the process, method of element, commodity or equipment.
It will be understood by those skilled in the art that embodiments herein can provide as method, system or computer program product.
Therefore, complete hardware embodiment, complete software embodiment or embodiment combining software and hardware aspects can be used in the application
Form.It is deposited moreover, the application can be used to can be used in the computer that one or more wherein includes computer usable program code
The shape for the computer program product implemented on storage media (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
Formula.
The above description is only an example of the present application, is not intended to limit this application.For those skilled in the art
For, various changes and changes are possible in this application.All any modifications made within the spirit and principles of the present application are equal
Replacement, improvement etc., should be included within the scope of the claims of this application.
Claims (10)
1. a kind of time-phase displacement device, which is characterized in that including：Drive module and at least three phase shift modules；
The medium refraction index of at least three phase shift module be n, if will at least three phase shift module press thickness from greatly to
Minispread, the thickness difference between two neighboring phase shift module areWherein, Δ φ is the time-phase displacement device
Phaseshift step size, λ is optical source wavelength；
Drive module introduces different phase-shift phases in different moments by the position of change at least three phase shift module.
2. time-phase displacement device as described in claim 1, which is characterized in that the phase shift step number of the time-phase displacement device is 4, phase shift
Step-lengthWhen, the time-phase displacement device includes four phase shift modules：First phase shift module, the second phase shift module, third phase
Shifting formwork block and the 4th phase shift module；
Wherein, the thickness size of four phase shift modules is：First phase shift module<Second phase shift module<It is described
Third phase shift module<4th phase shift module；
Thickness difference between first phase shift module and second phase shift module isSecond phase shift
Thickness difference between module and the third phase shift module isThe third phase shift module and the 4th phase
Thickness difference between shifting formwork block is
3. such as the described in any item time-phase displacement devices of claim 1-2, which is characterized in that the material for constituting the phase shift module is
The crystalline material of laser is not absorbed.
4. time-phase displacement device as claimed in claim 3, which is characterized in that the crystalline material includes one of the following：
Quartz glass, tempered glass, crystal, jewel.
5. time-phase displacement device as described in claim 1, which is characterized in that at least three phase shift module constitutes disc knot
Structure；
The drive module is by controlling at least three phase shift modules rotation, to change at least three phase shift module
Position.
6. a kind of time-phase displacement device, which is characterized in that including：Drive module and at least three phase shift modules；
At least three phase shift module with a thickness of L, if by least three phase shift module by medium refraction index from greatly to
Minispread, the medium refraction index difference between two neighboring phase shift module areWherein, Δ φ is the time-phase displacement
The phaseshift step size of device, λ are optical source wavelength；
Drive module introduces different phase-shift phases in different moments by the position of change at least three phase shift module.
7. time-phase displacement device as claimed in claim 6, which is characterized in that the phase shift step number of the time-phase displacement device is 4, phase shift
Step-lengthWhen, the time-phase displacement device includes four phase shift modules：First phase shift module, the second phase shift module, third phase
Shifting formwork block and the 4th phase shift module；
Wherein, the medium refraction index size of four phase shift modules is：First phase shift module<Second phase shift module
<The third phase shift module<4th phase shift module；
Medium refraction index difference between first phase shift module and second phase shift module isSecond phase
Medium refraction index difference between shifting formwork block and the third phase shift module isThe third phase shift module and described
Medium refraction index difference between four phase shift modules is
8. such as the described in any item time-phase displacement devices of claim 6-7, which is characterized in that the material for constituting the phase shift module is
The crystalline material of laser is not absorbed.
9. time-phase displacement device as claimed in claim 8, which is characterized in that the crystalline material includes one of the following：
Quartz glass, tempered glass, crystal, jewel.
10. time-phase displacement device as claimed in claim 6, which is characterized in that at least three phase shift module constitutes disc
Structure；
The drive module is by controlling at least three phase shift modules rotation, to change at least three phase shift module
Position.
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| CN201810425874.XA CN108871220A (en) | 2018-05-07 | 2018-05-07 | A kind of time-phase displacement device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021102539A1 (en) * | 2019-11-26 | 2021-06-03 | Petróleo Brasileiro S.A. - Petrobras | Shearography and interferometry sensor with multidirectional dynamic phase-shifting and method for inspecting and measuring modes of vibration |
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| CN102853761A (en) * | 2012-08-28 | 2013-01-02 | 广州华工百川科技股份有限公司 | Space phase shifter |
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| US5289314A (en) * | 1992-03-25 | 1994-02-22 | Hughes Aircraft Company | Coatings for laser detector etalons |
| US5262889A (en) * | 1992-04-21 | 1993-11-16 | Hughes Aircraft Company | Optical frequency shifter |
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| WO2021102539A1 (en) * | 2019-11-26 | 2021-06-03 | Petróleo Brasileiro S.A. - Petrobras | Shearography and interferometry sensor with multidirectional dynamic phase-shifting and method for inspecting and measuring modes of vibration |
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