CN107748444A - A kind of polarised light wide visual field transmission-type convergence lighting device and method - Google Patents
A kind of polarised light wide visual field transmission-type convergence lighting device and method Download PDFInfo
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- CN107748444A CN107748444A CN201711250226.7A CN201711250226A CN107748444A CN 107748444 A CN107748444 A CN 107748444A CN 201711250226 A CN201711250226 A CN 201711250226A CN 107748444 A CN107748444 A CN 107748444A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/281—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for attenuating light intensity, e.g. comprising rotatable polarising elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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Abstract
Technical solution of the present invention is disclosed in a kind of polarised light wide visual field transmission-type convergence transparent unit and method, and incident laser is separated into vertical the first beam polarised light and the second beam polarised light in polarization direction by polarization beam splitting part；The first beam polarised light is subjected to polarization rotation by polarizing optically-active part so that the polarization direction of the first beam polarised light is identical or opposite with the polarization direction of the second beam polarised light；By polarizing closing light part by the second beam polarised light and carrying out polarizing a postrotational first beam polarization light compositing coaxial synthesis light beam in the same direction；Convergence part is expanded by the laser beam merging that synthesizes into the illumination light for meeting visual field requirement by transmission-type.It can be seen that technical solution of the present invention can carry out polarized illumination using the vertical two parts polarised light in polarization direction in incident laser, the waste of laser energy is avoided.
Description
Technical field
The present invention relates to technical field of laser illumination, in particular, is related to a kind of polarised light wide visual field transmission-type convergence
Lighting device and method.
Background technology
Under water during object detection, laser illuminator can effectively be suppressed using the imaging of bluish-green polarization laser active illumination
The caused back scattering in water, immersed body image contrast is improved, improve image quality, high quality is provided for graphical analysis
Data；In addition, the surfaces characteristic such as immersed body refractive index, roughness can be analyzed by degree of polarization, measurement is provided for target identification
Data.
Laser is mostly partial poolarized light, by that will produce the orthogonal two parts of direction of vibration after the polarizer in laser
Polarised light, in the prior art using polarized illumination when, typically just using the polarised light of one of polarization direction, cause to swash
The waste of light energy.
The content of the invention
In order to solve the above problems, technical solution of the present invention provides a kind of polarised light wide visual field transmission-type convergence illumination dress
Put and method, polarized illumination can be carried out using the vertical two parts polarised light in polarization direction in incident laser, avoided
The waste of laser energy.
To achieve these goals, the present invention provides following technical scheme：
A kind of polarised light wide visual field transmission-type converges transparent unit, and the polarised light wide visual field transmission-type converges transparent unit
Including：
Polarized light beam splitting part, polarised light optically-active part, polarization actinic light part and transmission-type expand convergence part；
The polarized light beam splitting part be used for by incident laser be separated into the first vertical beam polarised light of polarization direction and
Second beam polarised light, the incident polarised light optically-active part of the first beam polarised light, described in the second beam polarised light incidence
Polarize actinic light part；
The polarised light optically-active part is used to the first beam polarised light carrying out polarization rotation so that first beam is inclined
Shake light polarization direction it is identical or opposite with the polarization direction of the second beam polarised light；Polarize postrotational first beam
The incident polarization actinic light part of polarised light；
The polarization actinic light part is used for the first beam polarised light of incidence and second beam polarization is photosynthetic
As a synthesis Shu Guang coaxial in the same direction, the incident transmission-type of synthesis light expands convergence part；
The transmission-type expands the illumination light that convergence part is used to meeting the synthesis finishing synthesis into visual field requirement.
Preferably, in above-mentioned polarised light wide visual field transmission-type converges transparent unit, the polarized light beam splitting part is fertile
Lars prism.
Preferably, in above-mentioned polarised light wide visual field transmission-type converges transparent unit, the polarised light optically-active part includes：
Speculum and optically-active part；
The incident speculum of the first beam polarised light, reflexes to the optically-active part by the speculum, passes through
The optically-active part carries out the incident polarization actinic light part after polarization rotation.
Preferably, in above-mentioned polarised light wide visual field transmission-type converges transparent unit, the polarization actinic light part includes
First transflection mirror；
The second beam polarised light is perpendicular through the first transflection mirror；
The postrotational first beam polarised light polarize with the incident first transflection mirror in Brewster angular direction, is hung down
Directly it is emitted the first transflection mirror.
Preferably, in above-mentioned polarised light wide visual field transmission-type converges transparent unit, the transmission-type expands convergence part
Including：
With the second transflection mirror, the first convex lens, concavees lens, the second convex lens and the 3rd convex lens of optical axis；The conjunction
Cheng Guang passes sequentially through the second transflection mirror, first convex lens, the concavees lens, second convex lens and described
Three convex lens.
Preferably, in above-mentioned polarised light wide visual field transmission-type converges transparent unit, the second transflection mirror is positioned at described
The focal position of first convex lens incident side；
The focus of the focus of the concavees lens incident side and the second convex lens incident side overlaps.
Preferably, in above-mentioned polarised light wide visual field transmission-type converges transparent unit, field number D calculation formula is：
D=d*L/f3
Wherein, d be the 3rd convex lens diameter, f3For the focal length of the 3rd convex lens；L is the 3rd convex lens
For the focus of mirror light emission side to the distance of illumination region, illumination region is border circular areas.
Present invention also offers a kind of polarised light wide visual field transmission-type to converge clearing method, the polarised light wide visual field transmission
Formula convergence clearing method includes：
Incident laser is separated into by vertical the first beam polarised light and the second beam in polarization direction by polarization beam splitting part
Polarised light；
The first beam polarised light is subjected to polarization rotation by polarizing optically-active part so that the first beam polarised light
Polarization direction is identical or opposite with the polarization direction of the second beam polarised light；
By polarizing closing light part by the second beam polarised light and carrying out polarizing the postrotational first beam polarization
A light compositing coaxial synthesis light beam in the same direction；
Convergence part is expanded by the laser beam merging that synthesizes into the illumination light for meeting visual field requirement by transmission-type.
By foregoing description, polarised light wide visual field transmission-type convergence transparent unit that technical solution of the present invention provides with
And in method, incident laser is separated into by vertical the first beam polarised light and the second beam in polarization direction by polarization beam splitting part
Polarised light；The first beam polarised light is subjected to polarization rotation by polarizing optically-active part so that the first beam polarised light
Polarization direction is identical or opposite with the polarization direction of the second beam polarised light；By polarizing closing light part by second beam
Polarised light and carrying out polarizes a postrotational first beam polarization light compositing coaxial synthesis light beam in the same direction；Pass through transmission-type
Convergence part is expanded by the laser beam merging that synthesizes into the illumination light for meeting visual field requirement.It can be seen that technical solution of the present invention can be with
Polarized illumination is carried out using the vertical two parts polarised light in polarization direction in incident laser, avoids the waste of laser energy.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can also basis
The accompanying drawing of offer obtains other accompanying drawings.
Fig. 1 is the structural representation that a kind of polarised light wide visual field transmission-type provided in an embodiment of the present invention converges transparent unit
Figure；
Fig. 2 is the First partial enlarged drawing that polarised light wide visual field transmission-type shown in Fig. 1 converges transparent unit；
Fig. 3 is the second partial enlarged drawing that polarised light wide visual field transmission-type shown in Fig. 1 converges transparent unit；
Fig. 4 is the 3rd partial enlarged drawing that polarised light wide visual field transmission-type shown in Fig. 1 converges transparent unit；
Fig. 5 is the flow signal that a kind of polarised light wide visual field transmission-type provided in an embodiment of the present invention converges clearing method
Figure.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
With reference to figure 1- Fig. 4, Fig. 1 converges transparent unit for a kind of polarised light wide visual field transmission-type provided in an embodiment of the present invention
Structural representation, Fig. 2 is the First partial enlarged drawing that polarised light wide visual field transmission-type shown in Fig. 1 converges transparent unit, and Fig. 3 is
The transmission-type of polarised light wide visual field shown in Fig. 1 converges the second partial enlarged drawing of transparent unit, and Fig. 4 regards for polarised light shown in Fig. 1 is wide
3rd partial enlarged drawing of field transmission-type convergence transparent unit.Polarised light wide visual field transmission-type convergence transparent unit includes：Partially
Light beam splitting means 11, polarised light optically-active part 12, polarization actinic light part 13 and the transmission-type of shaking expand convergence part 14.
The polarized light beam splitting part be used for by incident laser be separated into the first vertical beam polarised light L1 of polarization direction with
And the second beam polarised light L2, the incident polarised light optically-active parts 12 of the first beam polarised light L1, the second beam polarised light
The incident polarization actinic light parts 13 of L2.Incident laser has two polarization direction A1 and A2, A1 and A2 vertical.
The polarised light optically-active part 12 is used to the first beam polarised light L1 carrying out polarization rotation so that described first
Beam polarised light L1 polarization direction is identical or opposite with the polarization direction of the second beam polarised light L2；Polarize postrotational institute
State the incident polarization actinic light parts 13 of the first beam polarised light L1.
The polarization actinic light part 13 is used to polarize the first beam polarised light L1 of incidence and second beam
Light L2 synthesizes a synthesis Shu Guang coaxial in the same direction, and the incident transmission-type of synthesis light expands convergence part 14.It is described inclined
The synthesis light beam of the actinic light part 13 that shakes outgoing is polarised light, and the polarization direction of light is identical or opposite in the synthesis light beam.
The transmission-type expands the illumination light that convergence part 14 is used to meeting the synthesis finishing synthesis into visual field requirement.
Optionally, the polarized light beam splitting part 11 is Wollaston (Wollaston) prism 110.Incident laser is first
The the first beam polarised light L1 and the second beam polarised light L2 that angle is Φ are separated into by Wollaston prisms 110.
Wollaston prisms 110 are made by the transparent uniaxial crystal such as calcite or quartz, using the orthogonal two pieces of right-angled edges of optical axis
Mirror, formed along prism hypotenuse/facet surfaces with adhesive gluing.The optical axis 111 of one of right-angle prism and the optical axis of another right-angle prism
112 is vertical.
The angle, φ separated first beam polarised light L1 and the second beam polarised light L2 is calculated as follows：
Φ≈2arcsin[(no-ne)tanθ]
θ is that right-angle prism sets angle, noAnd neFor the refractive index of two beam polarised lights.
It is because this prism can increase the discrete of two kinds of linearly polarized lights to separate polarised light from Wollaston prisms 110
Angle, while two bunch polarised lights can be emitted.
Optionally, the polarised light optically-active part 12 includes：Speculum 121 and optically-active part 122；First beam is inclined
The incident speculums 121 of the light L1 that shakes, reflex to the optically-active part 122 by the speculum 121, pass through the optically-active portion
Part 122 carries out the incident polarization actinic light part 13 after polarization rotation.The polarization actinic light part 13 includes the first transflection
Mirror 131；The second beam polarised light L2 is perpendicular through the first transflection mirror 131；Carry out polarizing postrotational first beam
Polarised light L1 is with the incident first transflection mirror 131 in Brewster's angle δ directions, the first transflection mirror described in vertical exit.
Specifically, the first beam polarised light L1 and second beam through the separation outgoing of Wollaston prisms 110 are inclined
Shake light L2, wherein the second beam polarised light L2 keeps former direction, the first transflection of vertical incidence mirror 131 and vertical exit, with the
The optical axis horizontal infection of one transflection mirror 131.Speculum 121 is completely reflecting mirror, changes the first beam polarised light L1 direction of propagation, and
The first beam polarised light L1 is set to be incided with Brewster's angle δ directions on the first transflection mirror 131, to ensure the first beam polarised light L1
After the first transflection mirror 131, to be propagated parallel to the optical axis direction of the first transflection mirror 131, so, the two beam difference directions of propagation
Polarised light a branch of synthesis light beam of propagating co-axial in the same direction can be synthesized by the first transflection mirror 131.First beam polarised light L1 is inclined
The change method in direction of shaking is：Optically-active is installed from the light path of the transflection of speculum 121 to the first mirror 131 in the first beam polarised light L1
Part 122, polarization directions of the first beam polarised light L1 after optically-active part 122 is rotated by 90 °, is changed into and is polarized with the second beam
Light L2 polarization direction is parallel (in the same direction or reversely).So, incident laser is by beam splitting, optically-active, conjunction beam, by two beam polarization sides
The parallel a branch of polarised light in polarization direction is synthesized to vertical polarised light.
The selection of optically-active part 122：Because wave plate only changes the polarization state of incident light, do not change light intensity, therefore and laser
Wavelength identical optically-active part is the first choice of optically-active part, and this measure farthest reduces the damage of laser energy during optically-active
Lose.In the embodiment of the present invention, the optically-active part 122 can be half-wave plate.
It is the parallel a branch of polarised light in polarization direction to synthesize light beam, and expanding convergence part 14 by transmission-type forms wide visual field
Illumination light.
Optionally, the transmission-type expands convergence part 14 and included：With the second transflection mirror 141, the first convex lens of optical axis
142nd, concavees lens 143, the second convex lens 144 and the 3rd convex lens 145；The synthesis light passes sequentially through second transflection
Mirror, first convex lens, the concavees lens, second convex lens and the 3rd convex lens.Wherein, described second is saturating
Anti- mirror 141 is located at the focal position of the incident side of the first convex lens 142；The focus of the incident side of concavees lens 143 and institute
The focus for stating the incident side of the second convex lens 144 overlaps.
Synthesize beam orthogonal and pass through the second transflection mirror 141, the light of the incident second transflection mirror 141 in other directions
Reflected, avoid light disturbance.Optionally, first concavees lens 142 are planoconvex spotlight, and its planar side is incident side, its
Convex surface side is light emission side；The concavees lens 143 are plano-concave lens, and its planar side is incident side, and its concave surface side is light extraction
Side；Second convex lens 144 are planoconvex spotlight, and its convex surface side is incident side, and its planar side is light emission side；Described 3rd
Convex lens 145 are planoconvex spotlight, and its planar side is incident side, and its convex surface side is light emission side.First concavees lens 142
Focal length is f1, the focal length of second convex lens 144 is f2。
By the second transflection mirror 141 polarised light parallel to the second transflection mirror 141 optical axis, due to the second transflection mirror 141
Be placed in the focus of the first concavees lens 142, then through the directional light of the second transflection mirror 141 outgoing after the first concavees lens 142, with
Maximum exit face is on concavees lens 143, because concavees lens 143 overlap with the focus of the second convex lens 144, so by recessed
The polarised light that lens 143 are emitted on the second convex lens 144 is emitted to the 3rd convex lens parallel to the optical axis of the second convex lens 144
On 1453, the focus of the light emission side of the 3rd convex lens 145 is then converged to, wide visual field illumination light is re-formed, is irradiated to search coverage,
Reach wide visual field illuminating effect.
Two kinds of the embodiment of the present invention, field number D calculation formula are：
D=d*L/f3
Wherein, d be the 3rd convex lens 145 diameter, f3For the focal length of the 3rd convex lens 145；L is described the
For the focus of the light emission side of three convex lens 145 to the distance of illumination region, illumination region is border circular areas.
In polarised light wide visual field transmission-type convergence transparent unit described in the embodiment of the present invention, convergence is carried out to synthesis light and expanded
Processing, wide visual field illumination can be formed, can be polarized using the vertical two parts polarised light in polarization direction in incident laser
Optical illumination, avoid the waste of laser energy.
Based on above-described embodiment, it is transparent that another embodiment of the present invention additionally provides a kind of polarised light wide visual field transmission-type convergence
Method, the polarised light wide visual field transmission-type converge clearing method as shown in figure 5, Fig. 5 is one kind provided in an embodiment of the present invention
Polarised light wide visual field transmission-type converges the schematic flow sheet of clearing method, and this method includes：
Step S11：By polarization beam splitting part by incident laser be separated into the first vertical beam polarised light of polarization direction with
And the second beam polarised light.
Step S12：The first beam polarised light is subjected to polarization rotation by polarizing optically-active part so that first beam
The polarization direction of polarised light is identical or opposite with the polarization direction of the second beam polarised light.
Step S13：By polarizing closing light part by the second beam polarised light and carrying out polarizing postrotational described
An a branch of polarization light compositing coaxial synthesis light beam in the same direction.
Step S14：Convergence part is expanded by the laser beam merging that synthesizes into the illumination for meeting visual field requirement by transmission-type
Light.
Polarised light wide visual field transmission-type convergence clearing method carries out convergence to synthesis light and expands place described in the embodiment of the present invention
Reason, wide visual field illumination can be formed, polarised light can be carried out using the vertical two parts polarised light in polarization direction in incident laser
Illumination, avoids the waste of laser energy.
Each embodiment is described by the way of progressive in this specification, what each embodiment stressed be and other
The difference of embodiment, between each embodiment identical similar portion mutually referring to.For polarization disclosed in embodiment
For light wide visual field transmission-type convergence clearing method, due to its with embodiment disclosed in the convergence of polarised light wide visual field transmission-type it is transparent
Device is corresponding, so description is fairly simple, related part is corresponding referring to polarised light wide visual field transmission-type convergence clearing method
Part illustrates.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and features of novelty phase one
The most wide scope caused.
Claims (8)
1. a kind of polarised light wide visual field transmission-type converges transparent unit, it is characterised in that the polarised light wide visual field transmission-type is converged
Poly- transparent unit includes：
Polarized light beam splitting part, polarised light optically-active part, polarization actinic light part and transmission-type expand convergence part；
The polarized light beam splitting part is used to incident laser being separated into vertical the first beam polarised light and second in polarization direction
Beam polarised light, the incident polarised light optically-active part of the first beam polarised light, the incident polarization of the second beam polarised light
Actinic light part；
The polarised light optically-active part is used to the first beam polarised light carrying out polarization rotation so that the first beam polarised light
Polarization direction it is identical or opposite with the polarization direction of the second beam polarised light；Polarize the postrotational first beam polarization
The incident polarization actinic light part of light；
The polarization actinic light part is used to synthesize the first beam polarised light of incidence and the second beam polarised light
A coaxial synthesis Shu Guang, the incident transmission-type of synthesis light expand convergence part in the same direction；
The transmission-type expands the illumination light that convergence part is used to meeting the synthesis finishing synthesis into visual field requirement.
2. polarised light wide visual field transmission-type according to claim 1 converges transparent unit, it is characterised in that the polarised light
Beam splitting means are Wollaston prism.
3. polarised light wide visual field transmission-type according to claim 1 converges transparent unit, it is characterised in that the polarised light
Optically-active part includes：Speculum and optically-active part；
The incident speculum of the first beam polarised light, reflexes to the optically-active part, by described by the speculum
Optically-active part carries out the incident polarization actinic light part after polarization rotation.
4. polarised light wide visual field transmission-type according to claim 1 converges transparent unit, it is characterised in that the polarised light
Closing light part includes the first transflection mirror；
The second beam polarised light is perpendicular through the first transflection mirror；
The postrotational first beam polarised light polarize with the incident first transflection mirror in Brewster angular direction, is vertically gone out
Penetrate the first transflection mirror.
5. polarised light wide visual field transmission-type according to claim 1 converges transparent unit, it is characterised in that the transmission-type
Expanding convergence part includes：
With the second transflection mirror, the first convex lens, concavees lens, the second convex lens and the 3rd convex lens of optical axis；The synthesis light
Pass sequentially through the second transflection mirror, first convex lens, the concavees lens, second convex lens and described 3rd convex
Lens.
6. polarised light wide visual field transmission-type according to claim 5 converges transparent unit, it is characterised in that described second is saturating
Anti- mirror is located at the focal position of the first convex lens incident side；
The focus of the focus of the concavees lens incident side and the second convex lens incident side overlaps.
7. polarised light wide visual field transmission-type according to claim 6 converges transparent unit, it is characterised in that field number D
Calculation formula be：
D=d*L/f3
Wherein, d be the 3rd convex lens diameter, f3For the focal length of the 3rd convex lens；L is that the 3rd convex lens go out
For the focus of light side to the distance of illumination region, illumination region is border circular areas.
8. a kind of polarised light wide visual field transmission-type converges clearing method, it is characterised in that the polarised light wide visual field transmission-type is converged
Poly- clearing method includes：
Incident laser is separated into by the first vertical beam polarised light of polarization direction by polarization beam splitting part and the second beam polarizes
Light；
The first beam polarised light is subjected to polarization rotation by polarizing optically-active part so that the polarization of the first beam polarised light
Direction is identical or opposite with the polarization direction of the second beam polarised light；
By polarize closing light part by the second beam polarised light and carrying out polarize postrotational first beam polarize it is photosynthetic
Into a synthesis light beam coaxial in the same direction；
Convergence part is expanded by the laser beam merging that synthesizes into the illumination light for meeting visual field requirement by transmission-type.
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| CN201711250226.7A CN107748444B (en) | 2017-12-01 | 2017-12-01 | Polarized light wide-field transmission type convergent illumination device and method |
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| CN201711250226.7A CN107748444B (en) | 2017-12-01 | 2017-12-01 | Polarized light wide-field transmission type convergent illumination device and method |
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| CN2593219Y (en) * | 2003-01-10 | 2003-12-17 | 中国科学院上海光学精密机械研究所 | High-efficiency high-power pulse laser polarization device |
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| CN102096293A (en) * | 2011-01-30 | 2011-06-15 | 河南科技大学 | Optical engine for three-piece liquid crystal on silicon (LCOS) laser projection display |
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| CN107748444B (en) | 2020-07-24 |
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