CN105487237B - A kind of beam splitter, the device and method of multiple laser radar - Google Patents
A kind of beam splitter, the device and method of multiple laser radar Download PDFInfo
- Publication number
- CN105487237B CN105487237B CN201511016383.2A CN201511016383A CN105487237B CN 105487237 B CN105487237 B CN 105487237B CN 201511016383 A CN201511016383 A CN 201511016383A CN 105487237 B CN105487237 B CN 105487237B
- Authority
- CN
- China
- Prior art keywords
- light
- optical elements
- light splitting
- incidence surface
- dichroic optical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/106—Beam splitting or combining systems for splitting or combining a plurality of identical beams or images, e.g. image replication
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/12—Beam splitting or combining systems operating by refraction only
- G02B27/123—The splitting element being a lens or a system of lenses, including arrays and surfaces with refractive power
-
- 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
- G02B27/10—Beam splitting or combining systems
- G02B27/12—Beam splitting or combining systems operating by refraction only
- G02B27/126—The splitting element being a prism or prismatic array, including systems based on total internal reflection
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The present invention relates to a kind of beam splitter, the device and methods of multiple laser radar, belong to beam splitter, device and method field.The light-dividing device that the present invention protects includes laser light source, collimates cylindrical lens and multi-panel column prism；The laser light source and the collimation cylindrical lens composition collimated light path, the light path form the strong point hot spot of a focusing in far field；The Dichroic Optical Elements that the multi-panel column prism is protected for the present invention.Beneficial effects of the present invention are：Be divided it is easy to implement, it is at low cost, do not need to beam splitter of high cost, it is simply easy using the design of part of the method for the present invention.Overcome the problem of capacity usage ratio of the prior art is low.It realizes light beam and penetrates energy separation, have the characteristics that integrated level is high, capacity usage ratio is high.Compared with prior art, this distribution can save the number of light source LD, realize low cost.
Description
Technical field
The present invention relates to beam splitter, device and method, particularly a kind of beam splitter of multiple laser radar, device and
Method.
Background technology
Light splitting technology is a kind of important technology of optical technology, according to optical principle, has plated film light splitting, prismatic decomposition, dissipates
Penetrate light splitting etc., the characteristics of different light-dividing principles has its respectively.Existing laser radar Laser emission light path, some is to light source
Carry out two points, some regardless of but be transformed into lines hot spot outgoing.In the laser radar for realizing multi-thread detection, receiving portion one
As completed by reception object lens, detected with multiple detection members, each detection member is split detected visual field, due to
It is each detection member between there are certain gap, although therefore inherently some light is not utilized into receiving lens,
Therefore this scheme energy loss is serious.
Invention content
In order to overcome the deficiencies of the prior art, patent of invention devises a kind of based on multifaceted prism refraction light splitting part, sets
Meter principle is the radiation flux point in emission space solid angle to light source, particularly semiconductor laser or laser diode
Cut the subregions such as N.The present invention is intended to provide a kind of multi beam light-dividing device and method, take technical solution as described below：
A kind of Dichroic Optical Elements in multiple laser radar installations, comprising：First light splitting unit：The first noumenon
One incidence surface and the first exit surface；The area of first incidence surface is less than the area of first exit surface；
First exit surface is discontinuously adjacent to first incidence surface；The Dichroic Optical Elements include two or two
More than first light splitting unit.
Under preferred embodiment, the Dichroic Optical Elements include four first light splitting units, first incidence surface and the
One incidence surface continuously abuts, and first exit surface is continuously abutted with first exit surface；Described first enters firing table
The height of face and the first exit surface in vertical direction is more than the wavelength for the wave that is split.
Under further preferred embodiment, the Dichroic Optical Elements further include：Second light splitting unit：Second ontology, second
Incidence surface and the second exit surface；The area of second incidence surface is equal to the area of second exit surface；Institute
It states the second exit surface and is discontinuously adjacent to second incidence surface；The Dichroic Optical Elements include one or one with
The upper second light splitting unit.
Under further preferred embodiment, the Dichroic Optical Elements include two first light splitting units and one second light splitting
Unit, first incidence surface continuously abut respectively with second incidence surface, first exit surface respectively with institute
The second exit surface is stated continuously to abut；The Dichroic Optical Elements include four first light splitting units and one second light splitting is single
Position；The second incidence surface and the first incidence surface of two first light splitting units of the second light splitting unit continuously abut, the
Two exit surfaces are continuously abutted with two the first exit surfaces；Other two first is divided the first incidence surface and first of unit
Incidence surface continuously abuts, and the first exit surface is continuously abutted with the first exit surface；First incidence surface, the first outgoing
Surface, the height of the second incidence surface and the second exit surface in vertical direction are more than the wavelength for the wave that is split.
Under further preferred embodiment, first incidence surface, the first exit surface, the second incidence surface and second
Exit surface is plane.
The present invention also invented a kind of light-dividing device of multiple laser radar, including：Laser light source, collimate cylindrical lens and
Multi-panel column prism；The laser light source and the collimation cylindrical lens composition collimated light path, the light path form one in far field and gather
Burnt strong point hot spot；The multi-panel column prism is the Dichroic Optical Elements of any one multiple laser radar described above.
The present invention also invented a kind of light-splitting method of multiple laser radar, and this method uses multiple laser described above
The light-dividing device of radar.
The advantages and positive effects of the present invention are：Light splitting scheme light splitting is easy to implement, at low cost, does not need to spectro-film etc.
Technique, also without grating beam splitting element of high cost, it is simply easy using the design of part of the method for the present invention.The present invention overcomes
The problem of capacity usage ratio of the prior art is low, if radar needs light path carrying out N beam splitting, then the achievable N of the present invention
Beam decile can form the facular point of N number of concentration in detection plane after beam splitting.It realizes light beam and penetrates energy separation, have integrated
The characteristics of degree is high, capacity usage ratio is high.Compared with prior art, this distribution can save the number of light source LD, realize it is low into
This.
Description of the drawings
Fig. 1 is light-dividing principle schematic diagram；
Fig. 2 is Dichroic Optical Elements outline drawing；
Fig. 3 is that four tunnels of the invention are divided one schematic diagram of embodiment；
Fig. 4 is that four tunnels of the invention are divided two schematic diagram of embodiment；
Fig. 5 is the remote irradiation degree collimated before not being divided；
Fig. 6 is the remote irradiation degree after the light splitting of four beam constant powers.
Reference sign：
1- laser light sources, 2,3- collimation cylindrical lens, 4,5,6- Dichroic Optical Elements.
Specific embodiment
Below in conjunction with the accompanying drawings, by specific embodiment, the invention will be further described.Following embodiment is descriptive
, it is not limited, it is impossible to which protection scope of the present invention is limited with this.
Patent of invention devises a kind of based on multifaceted prism refraction light splitting part, and design principle is to light source, particularly
The subregion such as semiconductor laser or laser diode, the radiation flux segmentation N in emission space solid angle.
Φi=∫ I (θx, θy)dΩi
In above formula, represent light source direction in space light intensity, be horizontally oriented angle, vertical direction angle function,
Represent the surface of sphere solid angle in cut zone, above formula integration is shown to be the radiation flux in divided i-th of subregion.Together
When, also it is Gaussian Profile in any plane light distribution perpendicular to transmitting axis, the distribution of light intensity can also be retouched with following formula
It states:
In above formula, coordinate system is established by origin of laser emission point, Kx is the inverse of x-axis direction laser beam divergence；Ky
Inverse for y-axis direction laser beam divergence；θxThe angle deflected along the x-axis direction for laser；θyIt is deflected along the y-axis direction for laser
Angle；I0Prolong the radiation intensity of axis direction for light source.A1, a2 be respectively x-axis deflection angle integration bound, b1,
B2 is respectively the bound in the integration of y-axis deflection angle.
Physical significance of the Dichroic Optical Elements based on above-mentioned two formula of the present invention is divided, and light-dividing principle is as schemed
Shown in 1.
Incident light first collimates it before entering Dichroic Optical Elements, then enters Dichroic Optical member by incidence surface
Part, since multifaceted prism has different deviation angle α, i.e., in face of the solid angle of light source, emergent light is divided into N point, and these N
Son is respectively directed to different angles, is projected towards the direction being pre-designed.The Dichroic Optical Elements of the present invention can also be regarded as
To be accumulated by multiple bucking ladders and/or one or more four-prisms, each bucking ladder has certain height h and the deviation angle
α, the radiation flux of each beam splitting of the two structural parameter controls.H is higher, towards light source solid angle it is bigger, by adjusting h
The decile of realization light beam or not decile.The height of h is much larger than the wavelength for being divided light wave, thus be excluded that the optics based on diffraction principle
Element.Deviation angle α is the solid angle towards light source, and the deviation angle of each N point after beam splitting is determined by the α of each bucking ladder.
The shape that Dichroic Optical Elements may have is as shown in Figure 2.
The Dichroic Optical Elements protected of the present invention are not limited to the shape described in embodiment or description of the drawings, and the present invention protects
The Dichroic Optical Elements of shield can realize two points three points four points five points or more points to light, and realize decile to light splitting or differ
Point.
Below specific embodiment party is illustrated so that the first light splitting unit is bucking ladder, the second light splitting unit is four-prism as an example
Formula.
(1) embodiment 1
Dichroic Optical Elements are made of two first light splitting units, are selected according to the principle of above-mentioned physical equation by light splitting demand
Height is taken as two first of h1 and h2 light splitting units, realizes bisection or the two not deciles of light beam.Direction is deflected by emergent light
Need choose deviation angle α 1 and α 2.The incidence surface of two first light splitting units continuously abuts, and two first are divided unit
Exit surface continuously abuts.Dichroic Optical Elements can realize two points of light beam.
(2) embodiment 2
Dichroic Optical Elements are made of two first light splitting units and one second light splitting unit, according to above-mentioned physical equation
Principle choose height as two first of h1, h2, h3 light splitting units and one second light splitting unit by light splitting demand, realize light
The decile of beam or not decile need selection deviation angle α 1, α 2, α 3 by emergent light deflection direction.Two first are divided unit
Incidence surface of the incidence surface respectively with the second light splitting unit continuously abuts, and the exit surfaces of two light splitting units are respectively with second
Light splitting 1 exit surface of unit continuously abuts.Dichroic Optical Elements can realize three points of light beam.
(3) embodiment 3
Dichroic Optical Elements are made of four first light splitting units, are selected according to the principle of above-mentioned physical equation by light splitting demand
Height is taken as four first of h1, h2, h3, h4 light splitting units, realizes the quartering or four not deciles of light beam.It is deflected by emergent light
Direction needs selection deviation angle α 1, α 2, α 3, α 4.The incidence surface of four first light splitting units continuously abuts, four first point
The exit surface of light unit continuously abuts, and four first light splitting units are symmetrical with intermediate crest line.Dichroic Optical Elements can realize light
Four points of beam.
(4) embodiment 4
Dichroic Optical Elements are applied in combination by the element of embodiment 1 with the element in embodiment 2, realize 5 beam splitting, and combination makes
Used time, the element of embodiment 1 are combined with the element in embodiment 2, and the part to connect is just in the plane of light source optical axis.Such as
The element of fruit embodiment 1 realizes light source and halves that the original paper of embodiment 2 realizes trisection to light source, then rear shape is applied in combination
The light splitting ratio of pairs of light source 1/6,1/6,1/6,1/4,1/4.
The present invention has carried out the quartering by taking quartering Dichroic Optical Elements as an example to laser light source LD, and realization method has following
Two kinds.The Dichroic Optical Elements protected of the present invention are not limited to the shape described in embodiment or description of the drawings, present invention protection
Dichroic Optical Elements can realize two points three points four points five points or more points to light, and decile is realized to light splitting or is differed
Point.
(5) embodiment 5
As shown in figure 3, first way is to carry out four-quadrant method, including laser light source 1, cylindrical lens 2,3 are collimated, point
Light optical element 4,5.Wherein light source 1 and collimation cylindrical lens 2,3 form collimated light path, which forms a collimation in far field
Laser beam.The results are shown in Figure 5.Dichroic Optical Elements 4,5 are the combination of two Dichroic Optical Elements described in embodiment 1,
The two is placed side by side, forms a decile four sides, each of this four faces is equal in face of the solid angle α of light source 1, and four faces
Intersection point be located on the axis of light source, Dichroic Optical Elements 4,5 form adjoin each other first entering for four homalographics after combining
The first exit surface to adjoin each other of reflective surface and four homalographics, therefore the power sent out to light source 1 carries out four etc.
Point, the reached spectrophotometric result of this arrangement is that the equal bright spot of four energy is formed in far field.
(6) embodiment 6
As shown in figure 4, light-dividing device includes laser light source 1, cylindrical lens 2,3 and Dichroic Optical Elements 6 are collimated.Wherein light
Source 1 forms collimated light path with collimation cylindrical lens 2,3, which forms a collimated laser beam in far field.The results are shown in Figure 5.
Dichroic Optical Elements 6 are the Dichroic Optical Elements described in embodiment 3, light splitting surface by four adjoin each other first enter firing table
Face forms, and symmetrical with intermediate crest line, the h and α of two unilateral spectrophotometric units are unequal, apart from optical axis it is near first enter firing table
Face is because the light intensity received is big, and the h of spectrophotometric unit is smaller, and the first incidence surface area is smaller.Therefore, four spectrophotometric units
The solid angle α towards light source 1 it is also unequal.Light radiant flux according to each face of integral and calculating is equal.
Case study on implementation 5 and case study on implementation 6 can reach light splitting result as shown in Figure 6.
Claims (6)
1. a kind of Dichroic Optical Elements in multiple laser radar installations, comprising：
First light splitting unit：The first noumenon, the first incidence surface and the first exit surface；The area of first incidence surface
Not equal to the area of first exit surface；First exit surface is discontinuously adjacent to first incidence surface；
It is characterized in that, the Dichroic Optical Elements include two or more the first light splitting units；The Dichroic Optical member
Part includes the second light splitting unit：Second ontology, the second incidence surface and the second exit surface；The face of second incidence surface
Product is equal to the area of second exit surface；Second exit surface is discontinuously adjacent to second incidence surface；
The Dichroic Optical Elements include one or more the second light splitting units；
The Dichroic Optical Elements include two first light splitting units and one second light splitting unit, first incidence surface point
It is not abutted continuously with second incidence surface, first exit surface continuously abuts respectively with second exit surface；
The height of first incidence surface and the first exit surface in vertical direction is more than the wavelength for the wave that is split；
First incidence surface, the first exit surface, the second incidence surface and the second exit surface are in vertical direction
Highly it is more than the wavelength for the wave that is split.
2. a kind of Dichroic Optical Elements according to claim 1, which is characterized in that the Dichroic Optical Elements include four
First light splitting unit, first incidence surface continuously abut, and first exit surface continuously abuts.
3. a kind of Dichroic Optical Elements according to claim 1, which is characterized in that the Dichroic Optical Elements include four
First light splitting unit and one second light splitting unit；Second incidence surface of the second light splitting unit and two first light splitting
First incidence surface of unit continuously abuts, and the second exit surface is continuously abutted with two the first exit surfaces；Other two
First incidence surface of one light splitting unit is continuously abutted with the first incidence surface, and the first exit facet and the first exit surface are continuously adjacent
It connects.
4. according to a kind of Dichroic Optical Elements described in claim 1-3 any claims, which is characterized in that described first enters
Reflective surface, the first exit surface, the second incidence surface and the second exit surface are plane.
5. a kind of light splitting dress of the multiple laser radar of the Dichroic Optical Elements comprising described in claim 1-4 any claims
It puts, including：Laser light source collimates cylindrical lens and multi-panel column prism；The laser light source and the collimation cylindrical lens composition
Collimated light path, the light path form the strong point hot spot of a focusing in far field；
It is characterized in that, the multi-panel column prism is any one Dichroic Optical Elements described in claim 1-4.
6. a kind of light-splitting method of multiple laser radar, which is characterized in that use the multiple laser radar described in claim 5
Light-dividing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016383.2A CN105487237B (en) | 2015-12-29 | 2015-12-29 | A kind of beam splitter, the device and method of multiple laser radar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511016383.2A CN105487237B (en) | 2015-12-29 | 2015-12-29 | A kind of beam splitter, the device and method of multiple laser radar |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105487237A CN105487237A (en) | 2016-04-13 |
| CN105487237B true CN105487237B (en) | 2018-06-12 |
Family
ID=55674316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511016383.2A Active CN105487237B (en) | 2015-12-29 | 2015-12-29 | A kind of beam splitter, the device and method of multiple laser radar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105487237B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105182549B (en) * | 2015-08-28 | 2018-01-12 | 南方科技大学 | A kind of optical spectroscopic device |
| CN106684694A (en) * | 2017-02-17 | 2017-05-17 | 北京工业大学 | Laser beam splitting device used for multi-line laser radar |
| CN107843987A (en) * | 2017-10-27 | 2018-03-27 | 中国科学院上海光学精密机械研究所 | Combine rectangular pyramid mirror light-dividing device |
| CN108845407A (en) * | 2018-07-03 | 2018-11-20 | 苏州闻道电子科技有限公司 | Based on polyhedral prism and warbled high-velocity scanning imaging method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908731A (en) * | 2006-08-29 | 2007-02-07 | 上海微电子装备有限公司 | Wavelength beam splitter/combiner |
| CN102347035A (en) * | 2010-07-30 | 2012-02-08 | 三洋电机株式会社 | Optical pickup device |
| EP2437038A1 (en) * | 2010-10-01 | 2012-04-04 | Raytheon Company | Two material achromatic prism |
| CN203178508U (en) * | 2013-03-20 | 2013-09-04 | 常州华达科捷光电仪器有限公司 | Trapezoid prism and spectral device provided with trapezoid prism |
| CN104536069A (en) * | 2015-01-06 | 2015-04-22 | 京东方科技集团股份有限公司 | Splitting film, backlight module and display device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2009806A (en) * | 2011-12-05 | 2013-06-10 | Asml Netherlands Bv | Lithographic apparatus and device manufacturing method. |
-
2015
- 2015-12-29 CN CN201511016383.2A patent/CN105487237B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908731A (en) * | 2006-08-29 | 2007-02-07 | 上海微电子装备有限公司 | Wavelength beam splitter/combiner |
| CN102347035A (en) * | 2010-07-30 | 2012-02-08 | 三洋电机株式会社 | Optical pickup device |
| EP2437038A1 (en) * | 2010-10-01 | 2012-04-04 | Raytheon Company | Two material achromatic prism |
| CN203178508U (en) * | 2013-03-20 | 2013-09-04 | 常州华达科捷光电仪器有限公司 | Trapezoid prism and spectral device provided with trapezoid prism |
| CN104536069A (en) * | 2015-01-06 | 2015-04-22 | 京东方科技集团股份有限公司 | Splitting film, backlight module and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105487237A (en) | 2016-04-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105487237B (en) | A kind of beam splitter, the device and method of multiple laser radar | |
| US9742155B2 (en) | Modular laser apparatus | |
| US7079566B2 (en) | Semiconductor laser apparatus capable of routing laser beams emitted from stacked-array laser diode to optical fiber with little loss | |
| WO2017121000A1 (en) | Semiconductor laser | |
| KR102229320B1 (en) | Modular laser apparatus | |
| CN104007558B (en) | A kind of polarization of semiconductor laser beam merging apparatus and coupling process | |
| US10401635B2 (en) | Laser array beam combiner | |
| CN107121781B (en) | Beam shaping device | |
| KR20150143436A (en) | Device for homogenizing laser radiation | |
| CN103944067B (en) | A kind of high-power semiconductor laser closes beam system | |
| US7986461B2 (en) | Device for shaping laser radiation | |
| CN102809823A (en) | Beam combining, irradiating and receiving system of lasers | |
| CN203871649U (en) | High-power semiconductor laser beam expanding system | |
| CN103944059B (en) | High-power semiconductor laser beam expanding system | |
| RU2632254C2 (en) | Lighting device | |
| US9625727B2 (en) | Device for homogenizing a laser beam | |
| US20170299875A1 (en) | Single-emitter line beam system | |
| US11982841B2 (en) | Laser beam delivery system | |
| CN214899327U (en) | Multi-tube semiconductor laser | |
| US20140263222A1 (en) | Laser machining device for machining netted dots | |
| CN114094444B (en) | Laser diode area array system for realizing uniform flat-top distribution | |
| KR101457516B1 (en) | Apparatus for beam splitting | |
| TW201821825A (en) | Optical design of modular laser radar sensor comprising a laser projection system and a laser radar detection system | |
| US10295831B2 (en) | Light-conducting device, device having a light-conducting device, and means for emitting linear parallel light beams | |
| Selvas-Aguilar et al. | Power combiner for high-power diode lasers |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |