CN109143597A - Laser depolarization light-dividing device - Google Patents
Laser depolarization light-dividing device Download PDFInfo
- Publication number
- CN109143597A CN109143597A CN201811339716.9A CN201811339716A CN109143597A CN 109143597 A CN109143597 A CN 109143597A CN 201811339716 A CN201811339716 A CN 201811339716A CN 109143597 A CN109143597 A CN 109143597A
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- depolarization
- prism
- light
- film
- spectro
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Links
- 230000028161 membrane depolarization Effects 0.000 title claims abstract description 51
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 5
- 229910001635 magnesium fluoride Inorganic materials 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 7
- 230000003287 optical effect Effects 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 3
- 239000002356 single layer Substances 0.000 abstract description 3
- 239000000463 material Substances 0.000 description 10
- 230000005540 biological transmission Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002178 crystalline material Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Polarising Elements (AREA)
Abstract
The present invention relates to optical field, in particular to a kind of laser depolarization light-dividing device.A kind of laser depolarization light-dividing device, it is characterized by comprising the depolarization spectro-films between right-angle prism, the Dove prism being set to above right-angle prism and the light splitting inclined-plane one for being located in right-angle prism and the light splitting inclined-plane two of Dove prism, the right-angle prism is identical with the refractive index of Dove prism, and the refractive index of the depolarization spectro-film is lower than the refractive index of right-angle prism and Dove prism.The purpose of the present invention is to provide a kind of laser depolarization light-dividing devices, the device is combined using Dove prism and right-angle prism, Dove prism can realize big incidence angle, the effect of depolarization can be realized using single layer for depolarization spectro-film, and furthermore the device also has many advantages, such as that structure is simple, preparation is easy, depolarization is high-efficient.
Description
Technical field
The present invention relates to optical field, in particular to a kind of laser depolarization light-dividing device.
Background technique
When light oblique incidence, since effective refractive index of the film layer to two polarization states (P-polarized light and S polarized light) is different,
Caused reflected light, transmitted light and phase difference are all different, therefore inevitably result from polarization effect, outstanding in cemented prism
It is obvious.This phenomenon is all negative effect factor in the optical system that many laser are applied, and needs to be eliminated.
General depolarization Amici prism mostly uses the form of two right-angle prisms gluing, i.e., first process two same sizes etc.
Then waist right-angle prism plates multilayer depolarization spectro-film, finally two right-angle prisms on the light splitting inclined-plane of one right-angle prism
Inclined-plane carries out glued scheme.The depolarization spectro-film of the program is the structure of multilayer film, is usually repeated by a variety of dielectric materials
Stack combinations form, and the membrane system number of plies is more, structure is complicated, it is desirable that precision is high, production difficulty is big；Film layer is thick, high production cost.
Summary of the invention
The purpose of the present invention is to provide a kind of laser depolarization light-dividing device, which uses Dove prism and right-angled edge
Mirror is combined, and Dove prism can realize big incidence angle, and the effect of depolarization can be realized using single layer for depolarization spectro-film, this
The outer device also has many advantages, such as that structure is simple, preparation is easy, depolarization is high-efficient.
The present invention is implemented as follows: a kind of laser depolarization light-dividing device, it is characterised in that: including right-angle prism, set
The light splitting inclined-plane of the Dove prism that is placed in above right-angle prism and the light splitting inclined-plane one and Dove prism that are located in right-angle prism
Depolarization spectro-film between two, the right-angle prism is identical with the refractive index of Dove prism, the folding of the depolarization spectro-film
Penetrate the refractive index that rate is lower than right-angle prism and Dove prism.
Preferably, the depolarization spectro-film is made of monofilm, the depolarization spectro-film with a thickness of 138~
590nm。
Preferably, inclined-plane two and the angle of the plane of incidence are divided in the Dove prism is 30 °~85 °.
Preferably, the right-angle prism and Dove prism are made of vitreous silica, and the depolarization spectro-film uses
MgF2It is made.
For the prior art, the invention has the following advantages that
(1) it is combined using Dove prism and right-angle prism, Dove prism can realize big incidence angle, depolarization spectro-film
The effect of depolarization can be realized using single layer, furthermore the device also has structure is simple, preparation is easy, depolarization is high-efficient etc.
Advantage；
(2) spectro-film is only monofilm, and structure is simple, is substantially reduced convenient for design, production difficulty and cost.
Detailed description of the invention
The invention will be further described in conjunction with the embodiments with reference to the accompanying drawings:
Fig. 1 is the structural schematic diagram of laser depolarization light-dividing device of the present invention；
Fig. 2 is the light transmission rate figure of the embodiment of the present invention 1；
Fig. 3 is the light transmission rate figure of the embodiment of the present invention 2；
Fig. 4 is the light transmission rate figure of the embodiment of the present invention 3.
Symbol description in figure: 1, right-angle prism, 11, light splitting inclined-plane one, 2, Dove prism, 21, light splitting inclined-plane two, 22, enter
Penetrate face, 3, depolarization spectro-film, θ, the angle for being divided inclined-plane two and the plane of incidence.
Specific embodiment
The content of present invention is described in detail with specific embodiment with reference to the accompanying drawings of the specification:
As shown in Figure 1, being a kind of laser depolarization light-dividing device provided by the invention, it is characterised in that: including right-angled edge
Mirror 1, the Dove prism 2 for being set to 1 top of right-angle prism and the light splitting inclined-plane 1 and Dove prism for being located in right-angle prism 1
Depolarization spectro-film 3 between 2 light splitting inclined-plane 2 21, the right-angle prism 1 is identical with the refractive index of Dove prism 2, described
The refractive index of depolarization spectro-film 3 is lower than the refractive index of right-angle prism 1 and Dove prism 2.2 institute of right-angle prism 1 and Dove prism
Material selection need to be provided with the low absorptivity of good transmitance in laser application band, containing glass material, crystalline material, infrared
Material etc..3 selected materials of depolarization spectro-film need to be provided with the low absorptivity of good transmitance in laser application band.
Preferably, the depolarization spectro-film 3 is made of monofilm, the depolarization spectro-film 3 with a thickness of 138~
590nm。
In the present embodiment, the angle theta that inclined-plane 2 21 and the plane of incidence 22 are divided in the Dove prism 2 is 75 °.
Manufacturing process of the invention is as follows: in vacuum coating equipment, using vacuum coating technology on light splitting inclined-plane 1
Or the monofilm that accurate deposition specific thickness requires on light splitting inclined-plane 2 21, it then will be terraced by optical glue or optical cement technology
Shape prism 2 and right-angle prism 1 bond, and ultimately form the depolarization light-dividing device.
Embodiment 1:
The ultraviolet laser for being 355nm for wavelength:
The material of the right-angle prism 1 and Dove prism 2 is vitreous silica, and refractive index is 1.48@355nm, described depolarized
The material of vibration spectro-film 3 is MgF2, refractive index is 1.39@355nm；The depolarization spectro-film 3 with a thickness of 138nm.Such as Fig. 2
It is shown, it is the light transmission rate figure of the present embodiment, as can be seen from the figure: laser depolarization light-dividing device provided by the invention is high
355nm laser is equably divided into two-beam by effect ground, while guaranteeing the impartial (separation of S light and P light of the energy of S component and P component
Tp-Ts < 1.0%).
Embodiment 2:
The green laser for being 532nm for wavelength:
The material of the right-angle prism 1 and Dove prism 2 is vitreous silica, and refractive index is 1.47@532nm, described depolarized
The material of vibration spectro-film 3 is MgF2, refractive index is 1.38@532nm；The depolarization spectro-film 3 with a thickness of 250nm.Such as Fig. 3
It is shown, it is the light transmission rate figure of the present embodiment, it can be seen from the figure that laser depolarization light-dividing device provided by the invention is high
The green laser of 532nm is equably divided into two-beam by effect ground, while guaranteeing impartial (point of S light and P light of the energy of S component and P component
From Tp-Ts < 1.0%).
Embodiment 3:
The infrared laser for being 1064nm for wavelength:
The material of the right-angle prism 1 and Dove prism 2 is vitreous silica, and refractive index is 1.46@1064nm, described depolarized
The material of vibration spectro-film 3 is MgF2, refractive index is 1.37@1064nm；The depolarization spectro-film 3 with a thickness of 590nm.Such as figure
It is the light transmission rate figure of the present embodiment, it can be seen from the figure that laser depolarization light-dividing device provided by the invention shown in 4
1064nm infrared laser is equably efficiently divided into two-beam, while guaranteeing energy equalization (S light and the P of S component and P component
Separation Tp-Ts < 1.0% of light).
Above-mentioned specific embodiment is only explained in detail technical solution of the present invention, the present invention not only only office
It is limited to above-described embodiment, all any improvement or replacement according to the principle of the invention should all be within protection scope of the present invention.
Claims (4)
1. a kind of laser depolarization light-dividing device, it is characterised in that: including right-angle prism (1), be set to above right-angle prism (1)
Dove prism (2) and be located in the light splitting inclined-plane one (11) of right-angle prism (1) and the light splitting inclined-plane two of Dove prism (2)
(21) the depolarization spectro-film (3) between, the right-angle prism (1) is identical with the refractive index of Dove prism (2), the depolarization
The refractive index of spectro-film (3) is lower than the refractive index of right-angle prism (1) and Dove prism (2).
2. laser depolarization light-dividing device according to claim 1, it is characterised in that: the depolarization spectro-film (3) by
Monofilm composition, the depolarization spectro-film (3) with a thickness of 138~590nm.
3. laser depolarization light-dividing device according to claim 1, it is characterised in that: light splitting in the Dove prism (2)
The angle (θ) of inclined-plane two (21) and the plane of incidence (22) is 30 °~85 °.
4. laser depolarization light-dividing device according to claim 1, it is characterised in that: the right-angle prism (1) and trapezoidal
Prism (2) is made of vitreous silica, and the depolarization spectro-film (3) uses MgF2It is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811339716.9A CN109143597A (en) | 2018-11-12 | 2018-11-12 | Laser depolarization light-dividing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811339716.9A CN109143597A (en) | 2018-11-12 | 2018-11-12 | Laser depolarization light-dividing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109143597A true CN109143597A (en) | 2019-01-04 |
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ID=64808239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811339716.9A Pending CN109143597A (en) | 2018-11-12 | 2018-11-12 | Laser depolarization light-dividing device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112526656A (en) * | 2020-12-25 | 2021-03-19 | 福建福晶科技股份有限公司 | Four-direction depolarization beam splitter prism and preparation method thereof |
| CN112630985A (en) * | 2020-12-28 | 2021-04-09 | 福建福特科光电股份有限公司 | Color separation device and color separation method of black light lens |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401916A (en) * | 2011-11-30 | 2012-04-04 | 福建福晶科技股份有限公司 | Polarization beam splitting prism with high extinction ratio |
| CN102495437A (en) * | 2011-12-06 | 2012-06-13 | 福建福晶科技股份有限公司 | Ultraviolet high-performance polarization light splitting prism |
| CN209086573U (en) * | 2018-11-12 | 2019-07-09 | 福建福特科光电股份有限公司 | Laser depolarization light-dividing device |
-
2018
- 2018-11-12 CN CN201811339716.9A patent/CN109143597A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102401916A (en) * | 2011-11-30 | 2012-04-04 | 福建福晶科技股份有限公司 | Polarization beam splitting prism with high extinction ratio |
| CN102495437A (en) * | 2011-12-06 | 2012-06-13 | 福建福晶科技股份有限公司 | Ultraviolet high-performance polarization light splitting prism |
| CN209086573U (en) * | 2018-11-12 | 2019-07-09 | 福建福特科光电股份有限公司 | Laser depolarization light-dividing device |
Non-Patent Citations (1)
| Title |
|---|
| 林永昌, 江绍基, 卢维强: "全介质宽波段消偏振分光镜", 北京理工大学学报, no. 04, 30 August 1991 (1991-08-30), pages 10 - 15 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112526656A (en) * | 2020-12-25 | 2021-03-19 | 福建福晶科技股份有限公司 | Four-direction depolarization beam splitter prism and preparation method thereof |
| CN112630985A (en) * | 2020-12-28 | 2021-04-09 | 福建福特科光电股份有限公司 | Color separation device and color separation method of black light lens |
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