CN109696241A - Polarization state detection device, its detection method and application - Google Patents
Polarization state detection device, its detection method and application Download PDFInfo
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- CN109696241A CN109696241A CN201910132698.5A CN201910132698A CN109696241A CN 109696241 A CN109696241 A CN 109696241A CN 201910132698 A CN201910132698 A CN 201910132698A CN 109696241 A CN109696241 A CN 109696241A
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- 230000010287 polarization Effects 0.000 title claims abstract description 59
- 238000001514 detection method Methods 0.000 title claims abstract description 52
- 230000003287 optical effect Effects 0.000 claims abstract description 12
- 238000005259 measurement Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 5
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 3
- ORUIBWPALBXDOA-UHFFFAOYSA-L magnesium fluoride Chemical compound [F-].[F-].[Mg+2] ORUIBWPALBXDOA-UHFFFAOYSA-L 0.000 claims description 2
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims description 2
- 239000011159 matrix material Substances 0.000 claims description 2
- 229910052594 sapphire Inorganic materials 0.000 claims description 2
- 239000010980 sapphire Substances 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 230000003595 spectral effect Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000003902 lesion Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000011017 operating method Methods 0.000 description 1
- 230000005622 photoelectricity Effects 0.000 description 1
- 238000000711 polarimetry Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000009738 saturating Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0224—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using polarising or depolarising elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/447—Polarisation spectrometry
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- Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Polarising Elements (AREA)
Abstract
The present invention provides polarization state detection device, the detection device includes: beam expander, wave plate and wave plate fixed structure, diaphragm array structure, polarization beam splitter prism and two four-quadrant photo detectors；Additionally provide its detection method and application.Apparatus of the present invention all use fixing element to while realizing higher stability, also quick polarization state detection may be implemented, it is smaller that compact optical design accomplishes this plant bulk, to realize miniaturization, it is made to can satisfy the requirement that occasion is more widely applied.
Description
Technical field
The invention belongs to light measurement fields, and in particular to a kind of polarization state detection device and its detection method and application.
Background technique
The polarization state information of light is one of essential attribute of light field, and being measured by the polarization state to light can be from
It is middle to obtain a large amount of valuable information.Such as the variation of polarization state can before and after through sample for acquisition incident light in spectral measurement
It is relevant physically or chemically to obtain sample；Specific lesion tissue can be detected applied on imaging of medical；
In astronomical surveing, the spectrum polarizing information for obtaining remote celestial body can obtain the related substances attribute of celestial body.If cooperating phase
The polarization state controllers answered carry out real-time measurement to output light polarization state, and can be realized pair by feedback control
Any control of output light polarization state, this has very important meaning in the application such as some communications or accurate measurement.
Generally use four Stokes' parameter (S0, S1, S2, S3) the random polarization state of light is described, therefore it is right
The measurement of polarization state translates into the measurement to Stokes' parameter.The method for detecting any light field polarization state has very much
It plants, such as after the quarter-wave plate for making incident light pass through a rotation first, then after the polarizing film for passing through a fixed-direction,
Measurement changes through light beam light intensity, this is a kind of panel detector structure generallyd use in commercial Polarization Detection instrument, by spy
The analysis for surveying light intensity is obtained with the Stokes' parameter of incident light, since rotating wave plate is mechanical part, it is difficult to acquisition compared with
High stability, while the use of mechanical part is but also the speed of polarization state detection is relatively slow, it is difficult to it is fast for needing
The application of fast detecting polarization state.And for example voltage-controlled liquid crystal of phase delay device is used, electro-optic crystal or light ball modulator etc.
The polarization detector of composition, usually make incident light pass sequentially through two independent modulation respectively and phase main shaft at 45 degree of angles phase
After the delayer of position, then by the polarizing film of fixed-direction, measurement penetrates the light intensity signal of light beam, passes through phase-locked link demodulation and calculating
It is obtained with the corresponding Stokes' parameter of incident light, although the rapid survey to polarization state may be implemented in this method,
But system is relative complex, and cost of manufacture is higher.And other polarization detector is by being multi beam by incident light beam splitting
Light intensity signal hereafter is detected by different resolution elements again respectively after light, to obtain the polarization state of incident light, it can
To realize higher data acquisition rate, and cost of manufacture is lower, but element is more is unfavorable for integrated and realizes miniaturization.
The prior art is primarily present problem: one, using the detector of rotating wave plate, due to using mechanical part, stability
It is poor, while being difficult to realize higher speed of detection.Two, it is needed by the polarization detector of phase modulation delayer using locking phase
Ring, and structure is relatively complicated, and manufacturing cost is higher.Three, by being made up of respectively different resolution elements after beam splitting
Polarization detector structure is more complex, it is difficult to realize miniaturization.
Summary of the invention
Therefore, the purpose of the present invention is to overcome the defects in the prior art, provides a kind of polarization state detection device, and
Its detection method and application.
To achieve the above object, the first aspect of the present invention provides a kind of polarization state detection device, the detection dress
Set includes: that beam expander, wave plate and wave plate fixed structure, diaphragm array structure, polarization beam splitter prism and two four-quadrant photoelectricity are visited
Survey device；
Wherein, light beam passes through beam expander, then passes sequentially through wave plate fixed structure and diaphragm array equipped with wave plate, via
It is detected respectively by vertical distribution in the four-quadrant photo detector in both direction after polarization beam splitter prism beam splitting.
Detection device according to a first aspect of the present invention, wherein the beam expander includes: concavees lens and convex lens；It is preferred that
Ground, the amplified spot size of beam expander are matched with the 4 quadrant detector size.
Detection device according to a first aspect of the present invention, wherein the wave plate fixed structure and beam orthogonal are placed；
Preferably, the wave plate fixed structure has 4 circular openings, and the circular opening is arranged in 2 × 2 matrix.
Detection device according to a first aspect of the present invention, wherein in four circular openings, under beam orthogonal direction
Optical element is not placed in two apertures in side, places quarter-wave plate and two points respectively with two apertures above beam orthogonal direction
One of wave plate；
Preferably, the fast axis direction of the quarter-wave plate and light beam be at 45 degree of angles, the half wave plate it is fast
Axis direction and light beam are at 22.5 degree of angles.
Detection device according to a first aspect of the present invention, wherein diaphragm arrangement and the wave of the diaphragm array structure
The aperture of piece fixed structure is adapted, the diaphragm of the quadrant distribution and the diaphragm array structure of the four-quadrant photo detector
Arrangement is adapted.
Detection device according to a first aspect of the present invention, wherein the wave plate is selected from one or more of: polymerization object wave
The THREE-IN-ONE COMPOSITE ACHROMATIC wave plate of piece, quartz wave-plate, quartz plate and birefringent magnesium fluoride or ultraviolet sapphire sheet；
Preferably, the wave plate is polymer wave plate.
Detection device according to a first aspect of the present invention, wherein the wave plate is the polymerization object wave grown on same substrate
Piece；
Preferably, the part that phase delay is not needed in wave plate is the wave plate of wavelength phases delay.
The second aspect of the present invention provides a kind of polarization state detection method, and the method is using as described in relation to the first aspect
Detection device detect polarization state；
Preferably, it the described method comprises the following steps:
(1) transformational relation of the measurement voltage and light intensity to be measured of each quadrant of four-quadrant photo detector is measured；
(2) after light beam to be measured is by the detection device, the voltage of two each quadrants of four-quadrant photo detector is measured
Signal calculates the polarization state information that can be obtained light beam to be measured according to measurement result.
The third aspect of the present invention provides a kind of optical instrument, and the optical instrument includes as described in relation to the first aspect inclined
Shake condition checkout gear.
The fourth aspect of the present invention provides polarization state detection device described in first aspect in preparing optical instrument
Application.
Present inventors have proposed it is a kind of minimize polarization state detection device design, it all use fixing element to
While realizing higher stability, quick polarization state detection also may be implemented, compact optical design makes this dress
Setting size can accomplish smaller, to realize miniaturization, it be made to can satisfy the requirement that occasion is more widely applied.Of the invention
The design of miniaturization polarization state detection device all uses fixing element so as to realize very high stability, improves
The anti-interference ability of system, while quick polarization state detection may be implemented.
The device of the invention can have but be not limited to it is following the utility model has the advantages that
1. the stability of system can be improved using miniaturization polarization state detection device, reliability, and meanwhile it is higher inclined
Vibration state detection rate can satisfy the application for needing high speed measurement, and it is more square that lesser device volume installs it
Just, be conducive to the integrated of system.
2. the invention is mainly used in the application for needing to measure to polarization state, such as spectral measurement, light is logical
Polarization state detection and some relevant medical detection fields in letter, while can guarantee system stability, provide higher
Polarization state detection rates, and be conducive to the integrated of system.
Detailed description of the invention
Hereinafter, carrying out the embodiment that the present invention will be described in detail in conjunction with attached drawing, in which:
Fig. 1 shows polarimeter structural schematic diagram of the present invention.
Fig. 2 shows wave plate fixed structure schematic diagrames.
Fig. 3 shows diaphragm array schematic diagram.
Fig. 4 shows 4 quadrant detector schematic diagram.
Description of symbols:
1, concavees lens；2, convex lens；3, wave plate fixed structure；4, diaphragm array structure；5, polarization beam splitter prism；7, four-quadrant
Limit photodetector one；6, four-quadrant photo detector two.
Specific embodiment
Present invention will be further explained by specific examples below, it should be understood, however, that, these embodiments are only
It is used, is but should not be understood as present invention is limited in any form for specifically describing in more detail.
This part carries out general description to the material and test method that arrive used in present invention test.Although being
It realizes many materials used in the object of the invention and operating method is it is known in the art that still the present invention still uses up herein
It may detailed description.It will be apparent to those skilled in the art that within a context, if not specified, material therefor of the present invention and behaviour
It is well known in the art as method.
Material and instrument used in the following embodiment are as follows: material:
Polarization beam splitter prism is purchased from ThorLab company.
Instrument:
4 quadrant detector is purchased from Bin Song company, model S5980.
Embodiment 1
In view of the above-mentioned problems, it is an object of the invention to propose a kind of miniaturization polarization shape by compact optical design
The design of state detection device, it all uses fixing element so as to realize very high stability, and may be implemented fast
The polarization state detection of speed.It is logical below in conjunction with attached drawing in order to which the purpose of the present invention, technical solution and principle is more clearly understood
Crossing specific embodiment, the present invention is described in more detail.
The structure of polarization state detection device is as shown in Figure 1, wherein element 1 is concavees lens, and 2 be convex lens, and 1 and 2 is common
It constitutes beam expander to expand incident ray, 3 be wave plate fixed structure (structure is as shown in Figure 2), and 4 be diaphragm array structure
(structure is as shown in Figure 3), 5 be one piece of polarization beam splitter prism, wherein 7 and 6 be four-quadrant photo detector (structure such as Fig. 4 institute
Show).Light beam to be measured is propagated from left to right in the direction z as shown in figure, becomes section after first passing around the beam expander of 1 and 2 compositions
After biggish light beam, then after passing sequentially through and forming four beam light pencils after fixed structure and the diaphragm array equipped with wave plate, every Shu Guang
All respectively via being visited respectively by a pair of of quadrant of the four-quadrant photo detector in both direction after polarization beam splitter prism beam splitting
It surveys, to obtain corresponding voltage signal, the four Stokes ginseng that can be obtained by incident light is calculated by corresponding algorithm
Number relationship, to obtain the polarization state information of incident light.
Wherein the schematic diagram of wave plate fixed structure is not as shown in Fig. 2, wherein optical element, phase are placed in the position of C and D
It answers, only circular opening allows light beam to penetrate.Wherein the position of a placed a piece of quarter-wave plate, and the fast axle side of wave plate
To with x-axis at 45 degree of angles, be a piece of half wave plate, fast axis direction and x-axis into 22.5 degree of angular dependences at the B of position.Light beam is saturating
It crosses after these apertures and to form four bundles light via diaphragm again, every Shu Guang passes through after polarization beam splitter prism by photodetector corresponding one
Quadrant is detected, before assembling structure, needs to obtain the measurement of each quadrant of two panels four-quadrant photo detector by measurement
The transformational relation of voltage and detection light light intensity.It only needs to obtain in actual polarimetry in Fig. 2 through A, B, the light of location of C
Six detectable signals corresponding to beam are obtained with complete polarization state information.It is wherein corresponding by the light beam after A
The voltage signal of two pairs of quadrants is respectively V1xWith V1y, they meet relationship V known to relevant calculation1x=k1(S0+S3), V1y=k2
(S0-S3), wherein S0,S1,S2, S3For four Stokes' parameters (describing the polarization state information of incident light) of incident light,
K is a proportionality coefficient, need to be by specifically measuring to obtain, and corresponding k is proportional to the light intensity voltage turn of corresponding quadrant detector
Change coefficient.And k1With k2Proportionate relationship can be turned as measuring light intensity voltage corresponding to resulting this object limit detector
It changes coefficient to be obtained, and counts this ratio and be
It can then be obtained by calculation
Voltage signal for the corresponding two pairs of quadrants of light beam by B is respectively V2xWith V2y, and meet relationship V2x
=k3(S0-S2), V2y=k4(S0+S2), the relative size of the same corresponding proportion coefficient is it is known that be denoted as
It can then be calculated
Voltage signal for the corresponding two pairs of quadrants of light beam by C is respectively V3xWith V3y, meet relationship V3x=k5
(S0+S1), V3y=k6(S0-S1), it is the same to count
It can then be calculated
Then byMeasurement result can be obtained by four Stokes' parameters relative scale close
System, to obtain the polarization state information of incident beam, and since a pair of of quadrant corresponding to every Shu Guang is obtained
It is the proportionate relationship of corresponding Stokes' parameter, and each pair of proportionate relationship all contains S0, so that not needing corresponding three-beam
Light intensity has determining Splitting intensity ratio, and system is made to have higher Stability and adaptability.
Wherein the wave plate on wave plate fixed structure can be made of polymerizable material wave plate, its size and fast axis direction is all
It can customize, while in order to meet the needs of miniaturization, corresponding wave plate can be grown on same substrate, for the side of processing
Just, the polymer wave plate replacement of a wavelength phases delay can be used in the part for not needing phase delay, so that
The simpler stabilization of structure.
Although present invention has been a degree of descriptions, it will be apparent that, do not departing from the spirit and scope of the present invention
Under the conditions of, the appropriate variation of each condition can be carried out.It is appreciated that the present invention is not limited to the embodiments, and it is attributed to right
It is required that range comprising the equivalent replacement of each factor.
Claims (10)
1. a kind of polarization state detection device, which is characterized in that the detection device includes: that beam expander, wave plate and wave plate are fixed
Structure, diaphragm array structure, polarization beam splitter prism and two four-quadrant photo detectors；
Wherein, light beam passes through beam expander, then passes sequentially through wave plate fixed structure and diaphragm array equipped with wave plate, via polarization
It is detected respectively by vertical distribution in the four-quadrant photo detector in both direction after beam splitter prism beam splitting.
2. detection device according to claim 1, which is characterized in that the beam expander includes: concavees lens and convex lens；It is excellent
Selection of land, the amplified spot size of beam expander are matched with the 4 quadrant detector size.
3. detection device according to claim 1 or 2, which is characterized in that the wave plate fixed structure is put with beam orthogonal
It sets；
Preferably, the wave plate fixed structure has 4 circular openings, and the circular opening is arranged in 2 × 2 matrix.
4. detection device according to claim 3, which is characterized in that in four circular openings, with beam orthogonal side
Optical element is not placed in two apertures downwards, with beam orthogonal direction above two apertures place respectively quarter-wave plate and
Half wave plate；
Preferably, the fast axis direction of the quarter-wave plate and light beam are at 45 degree of angles, the fast axle side of the half wave plate
To with light beam at 22.5 degree of angles.
5. detection device according to claim 3 or 4, which is characterized in that the arrangement of the diaphragm of the diaphragm array structure with
The aperture of the wave plate fixed structure is adapted, quadrant distribution and the diaphragm array structure of the four-quadrant photo detector
Diaphragm arrangement be adapted.
6. detection device according to any one of claim 1 to 5, which is characterized in that the material of the wave plate be selected from
One or more of: polymer wave plate, quartz wave-plate, quartz plate and birefringent magnesium fluoride or the compound of ultraviolet sapphire sheet disappear
Color difference wave plate；
Preferably, the wave plate is polymer wave plate.
7. detection device according to any one of claim 1 to 6, which is characterized in that the wave plate is on same substrate
The polymer wave plate of growth；
Preferably, the part that phase delay is not needed in wave plate is the wave plate of wavelength phases delay.
8. a kind of polarization state detection method, which is characterized in that the method is used as described in any one of claims 1 to 7
Detection device detect polarization state；
Preferably, it the described method comprises the following steps:
(1) transformational relation of the measurement voltage and light intensity to be measured of each quadrant of four-quadrant photo detector is measured；
(2) after light beam to be measured is by the detection device, the voltage signal of two each quadrants of four-quadrant photo detector is measured,
The polarization state information that can be obtained light beam to be measured is calculated according to measurement result.
9. a kind of optical instrument, which is characterized in that the optical instrument includes inclined as described in any one of claims 1 to 7
Shake condition checkout gear.
10. polarization state detection device described in any one of claims 1 to 7 is preparing the application in optical instrument.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910132698.5A CN109696241B (en) | 2019-02-22 | 2019-02-22 | Polarization state detection device, detection method and application thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910132698.5A CN109696241B (en) | 2019-02-22 | 2019-02-22 | Polarization state detection device, detection method and application thereof |
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| CN109696241B CN109696241B (en) | 2021-02-26 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294894A (en) * | 2008-05-27 | 2008-10-29 | 杭州电子科技大学 | Continuous locking mold near-field optical cavity ring-down spectrum analysis device |
| CN103592030A (en) * | 2013-10-24 | 2014-02-19 | 西安交通大学 | Snapshot integral view field imaging full-polarization hyperspectral detection device |
| CN104457995A (en) * | 2014-12-15 | 2015-03-25 | 清华大学深圳研究生院 | Fast polarization detector and detecting method |
| CN107271041A (en) * | 2017-07-24 | 2017-10-20 | 河南师范大学 | A kind of laser polarization state measuring instrument |
| CN107367329A (en) * | 2017-06-22 | 2017-11-21 | 西安交通大学 | A kind of image, spectrum, polarization state integration acquisition device and detection method |
-
2019
- 2019-02-22 CN CN201910132698.5A patent/CN109696241B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101294894A (en) * | 2008-05-27 | 2008-10-29 | 杭州电子科技大学 | Continuous locking mold near-field optical cavity ring-down spectrum analysis device |
| CN103592030A (en) * | 2013-10-24 | 2014-02-19 | 西安交通大学 | Snapshot integral view field imaging full-polarization hyperspectral detection device |
| CN104457995A (en) * | 2014-12-15 | 2015-03-25 | 清华大学深圳研究生院 | Fast polarization detector and detecting method |
| CN107367329A (en) * | 2017-06-22 | 2017-11-21 | 西安交通大学 | A kind of image, spectrum, polarization state integration acquisition device and detection method |
| CN107271041A (en) * | 2017-07-24 | 2017-10-20 | 河南师范大学 | A kind of laser polarization state measuring instrument |
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