CN109100872A - Beam splitter and optical device comprising identical beam splitter - Google Patents
Beam splitter and optical device comprising identical beam splitter Download PDFInfo
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- CN109100872A CN109100872A CN201711479294.0A CN201711479294A CN109100872A CN 109100872 A CN109100872 A CN 109100872A CN 201711479294 A CN201711479294 A CN 201711479294A CN 109100872 A CN109100872 A CN 109100872A
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- light
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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
- G02B27/10—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
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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
Beam splitter provided by the invention, including several light beam splitting units, each smooth beam splitting unit is made of the light refraction face of several different directions, each light refraction face meets following relationships: each light refraction face is by incident parallel anaclasis to different directions, form beam splitting, beam splitting angle [alpha] meets following relationship: sin θ o=n sin θ i, α=θ o- θ i is wherein, n is the Refractive Index of Material for constituting the light refraction face, θ i is the angle in the light refraction face and incident light vertical plane, θ o is refraction angle of the light behind the light refraction face, beam splitter provided by the invention, its beam splitting angle is only related with Refractive Index of Material by the tilt angle of plane of refraction, and it is unrelated with its characteristic size, therefore it is easier to realize wide-angle beam splitting.
Description
Technical field
A kind of a kind of optics the present invention relates to optical device more particularly to beam splitter and comprising identical beam splitter is set
It is standby.
Background technique
Beam splitter is one of the device largely used in the optical applications such as optical communication, light shaping and optical detection, beam splitting
The hot spot uniformity and dispersion characteristics after angle, beam splitting in target face are the key indexes for determining device performance.
Currently used beam splitter is constituted using diffractive optical structure, using the principle of optical grating diffraction, is carried out to grating
It is two dimensional pixelated, then by the permutation and combination of pixel, laser is made to form the phase distribution of coding after optical grating diffraction structure,
Due to the coherence that incident laser is strong, the phase distribution after coding will generate interference, and the shape after light beam is transferred to far field
At specific light splitting result.
However, the central zero order light intensity of this beam splitting structure is very sensitive to the depth of optical grating construction, grating depth is slightly
Error can generate very strong zero order light, cause beam splitting uneven；Secondly, the characteristic size and its beam splitting angle after its pixelation are close
Cut phase is closed, and the characteristic size of pixelation is smaller, and beam splitting angle is bigger, but too small characteristic size is very tired in device fabrication
It is difficult；In addition, diffraction structure is very sensitive to lambda1-wavelength, and it is a kind of strong dispersion structure, after different wave length is incident, light beam splitting
Angle difference is very big.
Therefore, this kind of devices are very limited in the application.
Summary of the invention
Have in view of that, it is necessary to which a kind of beam splitter is provided, it is intended to which answering for the beam splitter provided in the prior art is provided
With limitation.
To achieve the above object, the present invention adopts the following technical solutions:
On the one hand, beam splitter provided by the invention, the beam splitter include several light beam splitting units, each described
Light beam splitting unit is made of the light refraction face of several different directions, and each light refraction face meets following relationships:
Incident parallel anaclasis to different directions, is formed beam splitting light beam, the beam splitting light by each light refraction face
The beam splitting angle [alpha] of beam meets following relationship:
Sin θ o=n sin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is that the light refraction face is vertical with incident light
The angle of plane, θ o are refraction angle of the light behind the light refraction face.
In some preferred embodiment, each light refraction face is by incident parallel anaclasis to behind different directions
Formed beam splitting light beam be incident to the energy size plane of refraction corresponding with the beam and focus of the beam and focus in target face with institute
The projected area for stating incident light vertical plane is proportional.In some preferred embodiment, the material of the beam splitter is optics
Plastics or optical glass.
In some preferred embodiment, the lateral dimension of each smooth beam splitting unit is less than incident beam spot size,
So that the smooth beam splitting unit is at least completely covered in the incident beam.
In some preferred embodiment, each smooth beam splitting unit is in periodicity arrangement.
In some preferred embodiment, the light beam after the beam splitter beam splitting in target face can formation rule point
Beam arrangement.
In some preferred embodiment, the light beam after the beam splitter beam splitting can form random point in target face
Beam arrangement.
On the other hand, the present invention has also mentioned a kind of optical device comprising the beam splitter.
The present invention by adopting the above technical scheme, can be realized it is following the utility model has the advantages that
Beam splitter provided by the invention, including several light beam splitting units, each smooth beam splitting unit is by several
The light refraction face of different directions forms, and each light refraction face meets following relationships: each light refraction face will be incident
Parallel anaclasis to different directions, form beam splitting, beam splitting angle [alpha] meets following relationship:
Sin θ o=n sin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is that the light refraction face is vertical with incident light
The angle of plane, θ o are refraction angle of the light behind the light refraction face, beam splitter provided by the invention, splitting angle
Degree is only related with Refractive Index of Material by the tilt angle of plane of refraction, and unrelated with its characteristic size, therefore is easier to realize big angle
Spend beam splitting.
In addition, beam splitter provided by the invention, each light refraction face is by incident parallel anaclasis to difference
Direction after formed beam splitting light beam be incident to the beam and focus in target face energy size it is corresponding with the beam and focus reflect
Face is proportional with the projected area of the incident light vertical plane, so that beam splitting energy of the beam splitter in target face
Than only being determined by corresponding plane of refraction in the angle with incident light vertical plane, no longer by the depth limit of micro-structure, therefore do not deposit
In very strong central zero order light.
In addition, beam splitter provided by the invention, due to using optical plastic or optical glass material, dispersion characteristics are remote
Less than the dispersion characteristics of diffraction structure, degree of dispersion is far below diffraction type beam splitter, and the applicable light wave segment limit of device is wider.
Detailed description of the invention
Fig. 1 is the operation schematic diagram for the beam splitter that the embodiment of the present invention 1 provides.
Fig. 2 is the sectional view for the beam splitter that the embodiment of the present invention 1 and 4 provides.
The top view of each smooth beam splitting unit in the beam splitter that Fig. 3 provides for the embodiment of the present invention 1.
Fig. 4 is the top view for the beam splitter that the embodiment of the present invention 1 provides.
Fig. 5 is the sectional view for the beam splitter that the embodiment of the present invention 2 and 3 provides.
The top view of each smooth beam splitting unit in the beam splitter that Fig. 6 provides for the embodiment of the present invention 2.
Fig. 7 is the top view for the beam splitter that the embodiment of the present invention 2 provides.
The top view of each smooth beam splitting unit in the beam splitter that Fig. 8 provides for the embodiment of the present invention 3.
The top view of each smooth beam splitting unit in the beam splitter that Fig. 9 provides for invention the present embodiment 4.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, the working principle diagram of beam splitter provided by the invention, the beam splitter 11 includes several light
Beam splitting unit (not shown), each smooth beam splitting unit are made of the light refraction face of several different directions, each described
Light refraction face meets following relationships:
Each light refraction face reflects incident directional light 13 to different directions, forms beam splitting light beam 14, and described point
The beam splitting angle [alpha] of light beams 14 meets following relationship:
Sin θ o=n sin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is that the light refraction face is vertical with incident light
The angle of plane, θ o are refraction angle of the light behind the light refraction face.
Beam splitter provided by the invention is appreciated that, since its beam splitting angle is only by the tilt angle of plane of refraction and material
Expect that refractive index is related, and it is unrelated with its characteristic size, therefore be easier to realize wide-angle beam splitting.
In some preferred embodiment, each light refraction face reflects incident directional light 13 to different directions
The energy size folding corresponding with the beam and focus 15 that beam splitting light beam 14 is incident to the beam and focus 15 in target face 12 is formed afterwards
Face is penetrated proportional with the projected area of the incident light vertical plane, so that beam splitting of the beam splitter in target face 12
Energy ratio only determines by corresponding plane of refraction in the angle with incident light vertical plane, no longer by the depth limit of micro-structure, therefore
There is no very strong central zero order light.
In some preferred embodiment, the material of the beam splitter is optical plastic or optical glass.
It is appreciated that dispersion characteristics are much smaller than diffraction since beam splitter uses optical plastic or optical glass material
The dispersion characteristics of structure, degree of dispersion are far below diffraction type beam splitter, and the applicable light wave segment limit of device is wider.
In some preferred embodiment, the lateral dimension of each smooth beam splitting unit is less than incident beam spot size,
So that the smooth beam splitting unit is at least completely covered in the incident beam.
In some preferred embodiment, each smooth beam splitting unit is in periodicity arrangement.
It is appreciated that the three dimensional diffraction unit does not limit to periodicity arrangement, it in practice can also be random
The arrangement of property.
In some preferred embodiment, the light beam after the beam splitter beam splitting in target face can formation rule point
Beam arrangement.
In some preferred embodiment, the light beam after the beam splitter beam splitting can form random point in target face
Beam arrangement.
Beam splitter provided by the invention, including several light beam splitting units, each smooth beam splitting unit is by several
The light refraction face of different directions forms, and each light refraction face meets following relationships: each light refraction face will be incident
Parallel anaclasis to different directions, form beam splitting, beam splitting angle [alpha] meets following relationship:
Sin θ o=n sin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is that the light refraction face is vertical with incident light
The angle of plane, θ o are refraction angle of the light behind the light refraction face, and due to beam splitter, beam splitting angle is only by rolling over
The tilt angle for penetrating face is related with Refractive Index of Material, and unrelated with its characteristic size, therefore is easier to realize wide-angle beam splitting.
In addition, the present invention also provides a kind of optical devices including above-mentioned beam splitter.
Specific implementation of the invention is described in detail below in conjunction with specific embodiment:
Embodiment 1:
Referring to Fig. 2, the sectional view of the beam splitter provided for the present embodiment 1, wherein upper surface is expressed as different inclinations
The light refraction face of angle, S0-S5 is the beam splitting light beam for the different directions that collimated light beam is formed after the beam splitter, described
The material of beam splitter is optical glass quartz, refractive index n=1.45.
Fig. 3 and Fig. 4 is please referred to, is the top view of each smooth beam splitting unit in beam splitter provided in this embodiment.
In the present embodiment, the plane of refraction in each smooth beam splitting unit is tilted towards different directions, constitutes 2*2 beam splitter,
The tilt angle theta i in each light refraction face is 43 degree in each smooth beam splitting unit, according to following formula, obtains its light beam splitting half
Angle α is 38.45 degree, and the 2*2 beam splitting full-shape of formation is 76.9 degree, is applicable in wave band near ultraviolet near infrared band
Sin θ o=n sin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is that the light refraction face is vertical with incident light
The angle of plane, θ o are refraction angle of the light behind the light refraction face.
Embodiment 2:
Referring to Fig. 5, the sectional view of the beam splitter provided for the present embodiment 2, wherein upper surface is expressed as different inclinations
The light refraction face of angle, S0-S5 is the beam splitting light beam for the different directions that collimated light beam is formed after the beam splitter, described
The material of beam splitter is optical glass D-ZK3, refractive index n=1.59.
Fig. 6 and Fig. 7 is please referred to, is the top view of each smooth beam splitting unit in beam splitter provided in this embodiment.
In the present embodiment, the plane of refraction in each smooth beam splitting unit is tilted towards different directions, constitutes 3*3 beam splitter,
The tilt angle theta i in each light refraction face is 38 degree in each smooth beam splitting unit, according to following formula, obtains its light beam splitting half
Angle α is 40.2 degree, and the 3*3 beam splitting full-shape of formation is 80.4 degree, is applicable in wave band near ultraviolet near infrared band.
Sin θ o=n sin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is that the light refraction face is vertical with incident light
The angle of plane, θ o are refraction angle of the light behind the light refraction face.
Embodiment 3:
Referring to Fig. 5, the sectional view of the beam splitter provided for the present embodiment 3, wherein upper surface is expressed as different inclinations
The light refraction face of angle, S0-S5 is the beam splitting light beam for the different directions that collimated light beam is formed after the beam splitter, described
The material of beam splitter is optical plastic polycarbonate, refractive index n=1.585.
Referring to Fig. 8, for the top view of each smooth beam splitting unit in beam splitter provided in this embodiment.
In the present embodiment, the plane of refraction in each smooth beam splitting unit is tilted towards different directions, constitutes 4*4 beam splitter,
The tilt angle theta i in each light refraction face is 39 degree in each smooth beam splitting unit, according to following formula, obtains its light beam splitting half
Angle α is 46.92 degree, and the 4*4 beam splitting full-shape of formation is 93.84 degree, and being applicable in wave band is visible light and near infrared band.
Sin θ o=n sin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is that the light refraction face is vertical with incident light
The angle of plane, θ o are refraction angle of the light behind the light refraction face.
Embodiment 4:
Referring to Fig. 2, the sectional view of the beam splitter provided for the present embodiment 4, wherein upper surface is expressed as different inclinations
The light refraction face of angle, S0-S5 is the beam splitting light beam for the different directions that collimated light beam is formed after the beam splitter, described
The material of beam splitter is optical plastic polymethyl methacrylate, refractive index n=1.49.
Referring to Fig. 9, for the top view of each smooth beam splitting unit in beam splitter provided in this embodiment.
In the present embodiment, the plane of refraction in each smooth beam splitting unit is tilted towards different directions, constitutes 5*5 beam splitter,
The tilt angle theta i in each light refraction face is 42 degree in each smooth beam splitting unit, according to following formula, obtains its light beam splitting half
Angle α is 43.56 degree, and the 5*5 beam splitting full-shape of formation is 87.12 degree, and being applicable in wave band is visible light and near infrared band.
Sin θ o=n sin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is that the light refraction face is vertical with incident light
The angle of plane, θ o are refraction angle of the light behind the light refraction face.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (8)
1. a kind of beam splitter, which is characterized in that the beam splitter includes several light beam splitting units, each smooth beam splitting
Unit is made of the light refraction face of several different directions, and each light refraction face meets following relationships:
Incident parallel anaclasis to different directions, is formed beam splitting light beam by each light refraction face, the beam splitting light beam
Beam splitting angle [alpha] meets following relationship:
Sin θ o=nsin θ i
α=θ o- θ i
Wherein, n is the Refractive Index of Material for constituting the light refraction face, and θ i is the light refraction face and incident light vertical plane
Angle, θ o be refraction angle of the light behind the light refraction face.
2. beam splitter according to claim 1, which is characterized in that each light refraction face is by incident directional light
Reflect the energy size and the light beam light that the beam and focus that beam splitting light beam is incident in target face is formed behind different directions
Spot corresponds to plane of refraction proportional with the projected area of the incident light vertical plane.
3. beam splitter according to claim 1, which is characterized in that the material of the beam splitter is optical plastic or light
Learn glass.
4. beam splitter according to claim 1, which is characterized in that the lateral dimension of each smooth beam splitting unit is less than
Incident beam spot size, so that the smooth beam splitting unit is at least completely covered in the incident beam.
5. beam splitter according to claim 1, which is characterized in that each smooth beam splitting unit is arranged in cyclic array
Cloth.
6. beam splitter according to claim 1, which is characterized in that the light beam after the beam splitter beam splitting is in target
On face can formation rule beam splitting arrangement.
7. beam splitter according to claim 1, which is characterized in that the light beam after the beam splitter beam splitting is in target
Random beam splitting arrangement can be formed on face.
8. a kind of optical device comprising beam splitter according to claim 1.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479294.0A CN109100872A (en) | 2017-12-29 | 2017-12-29 | Beam splitter and optical device comprising identical beam splitter |
| PCT/CN2018/075936 WO2019127858A1 (en) | 2017-12-29 | 2018-02-09 | Optical beam splitter and optical device comprising optical beam splitter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711479294.0A CN109100872A (en) | 2017-12-29 | 2017-12-29 | Beam splitter and optical device comprising identical beam splitter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109100872A true CN109100872A (en) | 2018-12-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711479294.0A Pending CN109100872A (en) | 2017-12-29 | 2017-12-29 | Beam splitter and optical device comprising identical beam splitter |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109100872A (en) |
| WO (1) | WO2019127858A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111880312A (en) * | 2020-03-27 | 2020-11-03 | 西安炬光科技股份有限公司 | Optical device, beam shaping method and application module |
| CN111880765A (en) * | 2020-08-05 | 2020-11-03 | 中国航天科工集团第二研究院 | Quantum random number generation method based on pendulum operator |
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| CN205404863U (en) * | 2015-12-29 | 2016-07-27 | 大连楼兰科技股份有限公司 | Arbitrary proportion beam splitting divides optical element |
| CN107167856A (en) * | 2017-04-25 | 2017-09-15 | 欧普照明股份有限公司 | Prism diffuser plate, prism diffuser plate preparation method and light fixture |
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2017
- 2017-12-29 CN CN201711479294.0A patent/CN109100872A/en active Pending
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| CN2655271Y (en) * | 2003-09-19 | 2004-11-10 | 中国科学院上海光学精密机械研究所 | Laser energy uniform distributing device |
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| CN104614864A (en) * | 2015-02-15 | 2015-05-13 | 张家港康得新光电材料有限公司 | Three-dimensional display device |
| CN205404863U (en) * | 2015-12-29 | 2016-07-27 | 大连楼兰科技股份有限公司 | Arbitrary proportion beam splitting divides optical element |
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| CN111880312A (en) * | 2020-03-27 | 2020-11-03 | 西安炬光科技股份有限公司 | Optical device, beam shaping method and application module |
| CN111880312B (en) * | 2020-03-27 | 2022-09-16 | 西安炬光科技股份有限公司 | Optical device, beam shaping method and application module |
| CN111880765A (en) * | 2020-08-05 | 2020-11-03 | 中国航天科工集团第二研究院 | Quantum random number generation method based on pendulum operator |
| CN111880765B (en) * | 2020-08-05 | 2023-08-15 | 中国航天科工集团第二研究院 | Quantum random number generation method based on pendulum operator |
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| Publication number | Publication date |
|---|---|
| WO2019127858A1 (en) | 2019-07-04 |
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