CN105676463A - Double-inlet beam splitter enabling any beam splitting ratios - Google Patents
Double-inlet beam splitter enabling any beam splitting ratios Download PDFInfo
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- CN105676463A CN105676463A CN201610195451.4A CN201610195451A CN105676463A CN 105676463 A CN105676463 A CN 105676463A CN 201610195451 A CN201610195451 A CN 201610195451A CN 105676463 A CN105676463 A CN 105676463A
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- light
- pbs
- speculum
- goes out
- beam splitter
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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
- G02B27/1006—Beam splitting or combining systems for splitting or combining different wavelengths
-
- 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
-
- 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
- G02B27/286—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising for controlling or changing the state of polarisation, e.g. transforming one polarisation state into another
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a double-inlet beam splitter enabling any beam splitting ratios. With the double-inlet beam splitter adopted, it can be ensured that the optical paths of split H light and V light are exactly equal, and therefore, the coherence of incident light can be ensured; since the separate H light and V light pass through similar paths and the identical reflectors, excellent stability can be ensured; with half wave plates adopted, the polarization of the light can be controlled, and therefore, control on the beam splitting ratios can be realized; beam splitting and combination unrelated polarization can be realized, or beam splitting and combination related to a certain proportion of polarization can be realized.
Description
Technical field
The present invention relates to optical technical field, particularly relate to the light beam beam splitter/combiner of the two entrance of a kind of arbitrary proportion.
Background technology
Modern optical system there are many places need to use beam splitter occasion, existing many conventional beam splitters, the PBS of such as film-coating type, light can be assigned to both sides, but this kind of beam splitter is to polarisation of light, and angle has and compares high requirement, and the opticinstrument effect for high precision is not fine, certainly the various beam splitter also having other, have various can not overcome get a little.
Given this, it is necessary to a kind of high precision of research, the beam splitter that polarization is unrelated, completes the optical tasks of some high precision.
Summary of the invention
It is an object of the invention to provide the light beam beam splitter/combiner of the two entrance of a kind of arbitrary proportion, regulate beam splitting to close bundle higher than precision, and polarization-independent, it is possible to it is widely used in various optical device
It is an object of the invention to be achieved through the following technical solutions:
A light beam beam splitter/combiner for the two entrance of arbitrary proportion, comprising: light beam polarization beam splitter PBS, three pieces of speculums and two pieces of half-wave plate HWP giving directions wavelength; Wherein:
Three pieces of speculums are designated as speculum 1, speculum 2, speculum 3; Two pieces of HWP are designated as HWP1, HWP2;
The a mouth of incident light on the left of PBS and/or inject PBS from the b mouth on PBS top, described incident light is the light beam of random polarization;
When a mouth of incident light on the left of PBS is injected after PBS, the H Transmission light in incident light goes out PBS, and the V luminous reflectance in incident light goes out PBS; Wherein, the H light of transmission is back to PBS successively after speculum 1, HWP1, speculum 2 and speculum 3; The V light of reflection is back to PBS successively after speculum 3, speculum 2, HWP2 and speculum 1; H Transmission light in Returning beam goes out PBS, and V luminous reflectance goes out PBS;
When incident light is injected after PBS from the b mouth on PBS top, the horizontal polarized light H Transmission light in incident light goes out PBS, and the vertical polarized light V luminous reflectance in incident light goes out PBS; Wherein, the H light of transmission is back to PBS successively after speculum 3, speculum 2, HWP2 and speculum 1; The V light of reflection is back to PBS successively after speculum 1, HWP1, speculum 2 and speculum 3; H Transmission light in Returning beam goes out PBS, and V luminous reflectance goes out PBS.
Further, by regulating HWP1 and HWP2 to control polarisation of light, reach the control of beam splitting ratio.
Further, described PBS is the polarization beam apparatus of artificial plated film polarized light beam splitter or other structures.
Further, also comprise: the speculum 4 for reflecting the H light from PBS outgoing or V light being arranged on PBS exit.
As seen from the above technical solution provided by the invention, first, can ensure that the light path of H light and the V light being divided into is completely equal, thus ensure that the coherency of emergent light, secondly, owing to the H light that separates and V light are through close path and identical speculum, so satisfactory stability can be ensured, wherein half-wave plate, it is also possible to control polarisation of light, reaches the control that beam splitting is closed bundle ratio in this way; In addition, it is also possible to the beam splitting conjunction realizing polarization unrelated is restrainted, or bundle is closed in the beam splitting that certain proportion polarization is correlated with.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, below the accompanying drawing used required in embodiment being described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for the those of ordinary skill of this area, under the prerequisite not paying creative work, it is also possible to obtain other accompanying drawings according to these accompanying drawings.
The structural representation of the light beam beam splitter/combiner of the two entrance of a kind of arbitrary proportion that Fig. 1 provides for the embodiment of the present invention;
The PBS spectroscopic processes schematic diagram that Fig. 2 provides for the embodiment of the present invention;
The structural representation of the light beam beam splitter/combiner of the two entrance of another arbitrary proportion that Fig. 3 provides for the embodiment of the present invention.
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 clearly and completely described, it is clear that described embodiment is only the present invention's part embodiment, instead of whole embodiments. Based on embodiments of the invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to protection scope of the present invention.
The embodiment of the present invention provides the light beam beam splitter/combiner of the two entrance of a kind of arbitrary proportion, and as shown in Figure 1, it mainly comprises: light beam polarization beam splitter PBS, three pieces of speculums and two pieces of half-wave plate HWP giving directions wavelength; Wherein: three pieces of speculums are designated as speculum 1, speculum 2, speculum 3; Two pieces of HWP are designated as HWP1, HWP2;
Build light path according to the structure in Fig. 1, utilize above-mentioned all optics, it is to construct stable sagnac ring structure.
In the embodiment of the present invention, light beam can a mouth on the left of PBS and/or inject PBS from the b mouth on PBS top; Meanwhile, incident light is the light beam of random polarization.
As shown in Figure 2, the H Transmission light in the light beam of described random polarization goes out PBS to PBS spectroscopic processes, and V luminous reflectance goes out PBS. In the embodiment of the present invention, the light beam of described random polarization can resolve into the superposition of H light, V light, and is H light, V light by incident light after PBS by beam splitting.
When a mouth of incident light on the left of PBS is injected after PBS, the H Transmission light in incident light goes out PBS, and the V luminous reflectance in incident light goes out PBS; Wherein, the H light of transmission is back to PBS successively after speculum 1, HWP1, speculum 2 and speculum 3; The V light of reflection is back to PBS successively after speculum 3, speculum 2, HWP2 and speculum 1; H Transmission light in Returning beam goes out PBS (from c mouth outgoing), and V luminous reflectance goes out PBS (from d mouth outgoing);
When incident light is injected after PBS from the b mouth on PBS top, the horizontal polarized light H Transmission light in incident light goes out PBS, and the vertical polarized light V luminous reflectance in incident light goes out PBS;Wherein, the H light of transmission is back to PBS successively after speculum 3, speculum 2, HWP2 and speculum 1; The V light of reflection is back to PBS successively after speculum 1, HWP1, speculum 2 and speculum 3; H Transmission light in Returning beam goes out PBS (from d mouth outgoing), and V luminous reflectance goes out PBS (from c mouth outgoing).
If two-beam is simultaneously incident from a, b two ends, by regulating HWP1, with HWP2, it is also possible to realize the conjunction bundle of two-beam arbitrary proportion, and after closing bundle, emergent light keeps good coherency.
In the embodiment of the present invention, by regulate three speculums can so that emergent light line overlap; Certainly, it is also possible to regulate three speculums to change the distance of outgoing light according to demand.
In the construction shown in fig. 1, the light beam being back in PBS can comprise H light and V light, it is also possible to is only H light or V light; Specifically by regulating HWP1 and HWP2 to control polarisation of light, the control of beam splitting ratio can be reached. Exemplary, H light splitting ratio can be 2:1, V light splitting ratio can be 3:1.
In the embodiment of the present invention, described PBS is artificial plated film polarized light beam splitter can also be the polarization beam apparatus of similar structures.
In addition, if there is requirement in the direction of emergent light, it is possible at c, a d outlet speculum that respectively adds, so just can regulate arbitrarily the direction of emergent light, complete the optical tasks of complexity. Exemplary, as shown in Figure 3, it is possible at the newly-increased speculum 4 of d outlet, for reflecting the H light from PBS outgoing or V light, thus change the direction of emergent light. Can certainly arranging a speculum 5 in outlet, concrete set-up mode, the angle of speculum can be determined according to demand.
The main tool of beam splitter that the embodiment of the present invention provides has the following advantages:
1) the sagnac ring structure used, the natural parallel and equivalent optical path of the two-beam separated in ring, the distance that light beam is walked is basically identical, so emergent light has good coherency.
2) using half-wave plate that the beam splitting ratio of light beam carries out beam splitting and close bundle, the beam splitting conjunction bundle that so just can carry out arbitrary proportion regulates.
3) can being integrated in one piece of less region, the effect that bundle is closed in beam splitting will be better.
4) the unrelated beam splitting of polarization can be realized and close bundle, it is also possible to bundle is closed in the beam splitting realizing the relevant arbitrary proportion of polarization.
The above; it is only the present invention's preferably embodiment, but protection scope of the present invention is not limited thereto, any it is familiar with those skilled in the art in the technical scope of present disclosure; the change that can expect easily or replacement, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should be as the criterion with the protection domain of claim book.
Claims (4)
1. the light beam beam splitter/combiner of the two entrance of arbitrary proportion, it is characterised in that, comprising: light beam polarization beam splitter PBS, three pieces of speculums and two pieces of half-wave plate HWP giving directions wavelength; Wherein:
Three pieces of speculums are designated as speculum 1, speculum 2, speculum 3; Two pieces of HWP are designated as HWP1, HWP2;
The a mouth of incident light on the left of PBS and/or inject PBS from the b mouth on PBS top, described incident light is the light beam of random polarization;
When a mouth of incident light on the left of PBS is injected after PBS, the H Transmission light in incident light goes out PBS, and the V luminous reflectance in incident light goes out PBS; Wherein, the H light of transmission is back to PBS successively after speculum 1, HWP1, speculum 2 and speculum 3; The V light of reflection is back to PBS successively after speculum 3, speculum 2, HWP2 and speculum 1;H Transmission light in Returning beam goes out PBS, and V luminous reflectance goes out PBS;
When incident light is injected after PBS from the b mouth on PBS top, the horizontal polarized light H Transmission light in incident light goes out PBS, and the vertical polarized light V luminous reflectance in incident light goes out PBS; Wherein, the H light of transmission is back to PBS successively after speculum 3, speculum 2, HWP2 and speculum 1; The V light of reflection is back to PBS successively after speculum 1, HWP1, speculum 2 and speculum 3; H Transmission light in Returning beam goes out PBS, and V luminous reflectance goes out PBS.
2. the light beam beam splitter/combiner of the two entrance of a kind of arbitrary proportion according to claim 1, it is characterised in that, by regulating HWP1 and HWP2 to control polarisation of light, reach the control of beam splitting ratio.
3. the light beam beam splitter/combiner of the two entrance of a kind of arbitrary proportion according to claim 1, it is characterised in that, described PBS is the polarization beam apparatus of artificial plated film polarized light beam splitter or other structures.
4. the beam splitter of the two entrance of a kind of arbitrary proportion according to claim 1, it is characterised in that, also comprise: the speculum 4 for reflecting the H light from PBS outgoing or V light being arranged on PBS exit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195451.4A CN105676463B (en) | 2016-03-29 | 2016-03-29 | The double-entry beam splitter bundling device of arbitrary proportion |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610195451.4A CN105676463B (en) | 2016-03-29 | 2016-03-29 | The double-entry beam splitter bundling device of arbitrary proportion |
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| CN105676463A true CN105676463A (en) | 2016-06-15 |
| CN105676463B CN105676463B (en) | 2018-04-10 |
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| CN201610195451.4A Active CN105676463B (en) | 2016-03-29 | 2016-03-29 | The double-entry beam splitter bundling device of arbitrary proportion |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018113424A1 (en) * | 2016-12-22 | 2018-06-28 | 深圳市光峰光电技术有限公司 | Light source system, automotive illuminating system and control method |
| CN108873164A (en) * | 2018-06-19 | 2018-11-23 | 上海交通大学 | The broadband waveguide beam splitter for polarizing unrelated |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018113424A1 (en) * | 2016-12-22 | 2018-06-28 | 深圳市光峰光电技术有限公司 | Light source system, automotive illuminating system and control method |
| CN108873164A (en) * | 2018-06-19 | 2018-11-23 | 上海交通大学 | The broadband waveguide beam splitter for polarizing unrelated |
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| Publication number | Publication date |
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| CN105676463B (en) | 2018-04-10 |
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