CN110596884A - Device with adjustable polarization-preserving reflection angle and adjusting method thereof - Google Patents
Device with adjustable polarization-preserving reflection angle and adjusting method thereof Download PDFInfo
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- CN110596884A CN110596884A CN201911000380.8A CN201911000380A CN110596884A CN 110596884 A CN110596884 A CN 110596884A CN 201911000380 A CN201911000380 A CN 201911000380A CN 110596884 A CN110596884 A CN 110596884A
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- wave plate
- polarization
- angle
- maintaining
- rotating device
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical 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
- G02B27/286—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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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Abstract
The invention discloses a device with an adjustable polarization-maintaining reflection angle, which comprises a base, wherein a first 1/4 wave plate is arranged on the base, a rotating device is arranged above a first 1/4 wave plate, a reflecting device is arranged above the rotating device, the reflecting device and the rotating device are relatively fixed, a second 1/4 wave plate is arranged at the top of the rotating device, and a second 1/4 wave plate is arranged opposite to a first 1/4 wave plate and is positioned right above a first 1/4 wave plate. The invention also discloses an adjusting method of the device with adjustable polarization-maintaining reflection angle. The invention can carry out polarization-preserving reflection on incident light and deflect the polarization state of reflected light at any angle.
Description
Technical Field
The invention belongs to the field of optics, and particularly relates to a device with adjustable polarization-maintaining reflection angle and an adjusting method thereof.
Background
In some optical systems, the optical path is often deflected, and in some systems with polarization requirements, a phase delay is often generated when the optical path is deflected, so that the polarization state of the deflected optical path changes. If it is necessary to ensure that the polarization state is unchanged, the polarization state of incident light and the reflection mirror need to be at a specific angle to realize polarization retention, which causes many limitations when building a system and prevents free deflection of an optical path under many circumstances.
The 1/4 wave plate can change the polarization state of incident light, for example, in the Chinese patent with publication No. CN105182457B, three lambda/4 wave plates are used, the lambda/4 wave plates are installed at a certain angle or optically glued on the light-passing surface of the pyramid prism, and the lambda/4 wave plates modulate the polarization state of the incident light or the emergent light to convert the polarization state into linearly polarized light. The patent utilizes the lambda/4 wave plate to adjust the polarization state of incident light or emergent light, but the lambda/4 wave plate is only applied to the field with requirements on polarization maintaining characteristics of a pyramid prism, and the emergent angle of the emergent light is limited.
Therefore, for a system with a requirement for polarization maintaining and a requirement for the emission direction of the emitted light, a device and a method for adjusting the polarization maintaining reflection angle are needed.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides a device with adjustable polarization-preserving reflection angle and an adjusting method thereof, which can carry out polarization-preserving reflection on incident light and deflect the polarization state of the reflected light at any angle.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a device of polarization maintaining reflection angle adjustable, includes the base, set up first 1/4 wave plates on the base, first 1/4 wave plate top sets up rotating device, the rotating device top sets up reflecting device, reflecting device and rotating device relatively fixed, the rotating device top sets up the second 1/4 wave plate, second 1/4 wave plate sets up with first 1/4 wave plate relatively and is located directly over first 1/4 wave plate.
Preferably, the optical axis of the first 1/4 wave plate forms an angle of 45 ° with the polarization state of incident light.
Preferably, the rotating device is fixed on the first bearing through a first fixing piece and is connected with the base in a sliding mode through the first bearing.
Further, the connection mode between the rotating device and the base is not limited to the bearing connection.
Preferably, the reflecting means comprises a mirror and a mirror support.
Preferably, the mirror comprises a plane mirror, a right angle mirror or other mirror with equal function.
Preferably, an 1/2 wave plate is arranged on the emergent light path of the reflecting device, the 1/2 wave plate is fixed in the 1/2 wave plate bracket, and the 1/2 wave plate bracket is connected with the mirror bracket in a sliding manner.
Further, the connection mode between the 1/2 wave plate bracket and the mirror bracket is not limited to a bearing connection.
Preferably, the 1/2 wave plate bracket is fixed on the second bearing through a second fixing piece and is connected with the mirror bracket in a sliding mode through the second bearing.
A method for adjusting a device with adjustable polarization maintaining reflection angle is realized by adopting the device, and the method comprises the following steps:
adjusting the direction of the optical axis of the first 1/4 wave plate so that the polarization state of incident light forms an included angle of 45 degrees with the optical axis of the first 1/4 wave plate;
adjusting the second 1/4 wave plate so that the optical axis of the second 1/4 wave plate forms an angle of 45 degrees with the direction reflected by the reflecting device;
the incident light sequentially passes through the first 1/4 wave plate, the second 1/4 wave plate and the reflecting device to obtain polarization-maintaining reflected light;
the rotating device drives the second 1/4 wave plate and the reflecting device to rotate around the axis of incident light, so as to obtain the emergent polarization-maintaining reflected light with any angle.
Preferably, an 1/2 wave plate is arranged on the light path emitted by the reflection device, and after the polarization-maintaining reflected light passes through the 1/2 wave plate, the polarization state of the reflected light is deflected at any angle.
Compared with the prior art, the invention has the beneficial effects that: in the invention, the incident linearly polarized light is changed into circularly polarized light after passing through the first 1/4 wave plate and then is reduced into linearly polarized light after passing through the second 1/4 wave plate, and the polarization direction of the linearly polarized light is parallel or vertical to the direction reflected by the reflecting device at the moment; meanwhile, the second 1/4 wave plate is fixed relative to the reflection device, and is driven by the rotation device to rotate around the axis of the incident light, so that polarization-preserving reflection in any direction is realized. The invention also changes the polarization state direction of the emergent light by adding 1/2 wave plate on the light path of the reflected light, thereby realizing the deflection of the polarization state of the reflected light at any angle.
Drawings
Fig. 1 is a schematic structural diagram of a device with adjustable polarization-maintaining reflection angle according to an embodiment of the present invention.
In the figure: 1: a first 1/4 wave plate; 2: a base; 3: a first snap ring; 4: a first bearing; 5: a rotating device; 6: a second 1/4 wave plate; 7: a mirror support; 8: a second bearing; 9: a second snap ring; 1/2 wave plates; 11: a mirror; 1/2 wave plate support.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the present invention provides a device with adjustable polarization maintaining reflection angle, which includes a base 2, wherein a first 1/4 wave plate 1 is disposed on the base 2, a rotating device 5 is disposed above the first 1/4 wave plate 1, a reflecting device is disposed above the rotating device 5, the reflecting device and the rotating device 5 are relatively fixed, a second 1/4 wave plate 6 is disposed at the top of the rotating device 5, and the second 1/4 wave plate 6 is disposed opposite to the first 1/4 wave plate 1 and is located right above the first 1/4 wave plate 1. In the invention, the incident linearly polarized light is changed into circularly polarized light after passing through the first 1/4 wave plate 1 and then is reduced into linearly polarized light after passing through the second 1/4 wave plate 6, and the polarization direction of the linearly polarized light is parallel or vertical to the direction reflected by the reflecting device at the moment; meanwhile, the second 1/4 wave plate 6 and the reflection device are relatively fixed, and are driven by the rotation device 5 to rotate around the axis of the incident light, so that polarization-preserving reflection in any direction is realized.
Specifically, the optical axis of the first 1/4 wave plate 1 forms an angle of 45 ° with the polarization state of incident light.
In one embodiment, the rotating device 5 is fixed on the first bearing 4 by a first snap ring 3, and is slidably connected with the base 2 by the first bearing 4. In practical applications, the rotating device 5 and the base 2 are not limited to be connected and matched by a bearing, and other conventional matching methods are also possible.
As an embodiment, the reflecting means comprise a mirror 11 and a mirror 11 holder 7. The reflector 11 may be a right triangular prism or other type of reflector 11.
In one embodiment, an 1/2 wave plate 10 is disposed on the exit light path of the reflection device, the 1/2 wave plate 10 is fixed in the 1/2 wave plate holder 12, and the 1/2 wave plate holder 12 is slidably connected to the mirror 11 holder 7. The purpose of this is: the polarization state of the reflected light is deflected at any angle by changing the polarization state direction of the outgoing light by adding 1/2 wave plate 10 on the optical path of the reflected light.
In one embodiment, the 1/2 wave plate bracket 12 is fixed on the second bearing 8 through a second snap ring 9, and is slidably connected with the bracket 7 of the reflector 11 through the second bearing 8. In practical applications, the 1/2 wave plate holder 12 and the reflector 11 holder 7 are not limited to be coupled and matched by bearings, and other conventional matching methods are also possible.
The invention also provides an adjusting method of the device with the adjustable polarization-maintaining reflection angle, which is realized by adopting the device with the adjustable polarization-maintaining reflection angle, and the method comprises the following steps:
adjusting the direction of the optical axis of the first 1/4 wave plate 1 so that the polarization state of incident light forms an included angle of 45 degrees with the optical axis of the first 1/4 wave plate 1;
adjusting the second 1/4 wave plate 6 so that the optical axis of the second 1/4 wave plate 6 forms an angle of 45 ° with the direction of reflection by the reflection device;
the incident light sequentially passes through the first 1/4 wave plate 1, the second 1/4 wave plate 6 and the reflecting device to obtain polarization-maintaining reflected light;
the rotating device 5 drives the second 1/4 wave plate 6 and the reflecting device to rotate around the axis of the incident light, so as to obtain the polarization-maintaining reflected light emitted at any angle.
Furthermore, an 1/2 wave plate 10 is arranged on the light emitting path of the reflection device, and after the polarization-preserving reflected light passes through the 1/2 wave plate 10, the polarization state of the reflected light is deflected at any angle.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. The utility model provides a device of polarization maintaining reflection angle adjustable, its characterized in that, includes the base, set up first 1/4 wave plates on the base, first 1/4 wave plate top sets up rotating device, the rotating device top sets up reflecting device, reflecting device and rotating device relatively fixed, the rotating device top sets up the second 1/4 wave plate, second 1/4 wave plate sets up with first 1/4 wave plate relatively and is located directly over first 1/4 wave plate.
2. The apparatus according to claim 1, wherein the optical axis of the first 1/4 wave plate forms an angle of 45 ° with the polarization state of the incident light.
3. The apparatus according to claim 1, wherein the rotating device is fixed on a first bearing by a first fixing member, and is slidably connected to the base by the first bearing.
4. The apparatus of claim 1, wherein the reflection device comprises a mirror and a mirror holder.
5. A polarization maintaining angularly adjustable device according to claim 4, wherein said mirrors comprise plane mirrors, right angle mirrors or other equally acting mirrors.
6. The apparatus of claim 4, wherein an 1/2 wave plate is disposed on the exit light path of the reflection device, the 1/2 wave plate is fixed in the 1/2 wave plate holder, and the 1/2 wave plate holder is slidably connected to the mirror holder.
7. The apparatus according to claim 6, wherein the 1/2 wave plate holder is fixed on the second bearing by a second fixing member, and is slidably connected with the mirror holder by the second bearing.
8. A method for adjusting a device with adjustable polarization maintaining reflection angle, which is implemented by the device of any one of claims 1 to 6, the method comprising:
adjusting the direction of the optical axis of the first 1/4 wave plate so that the polarization state of incident light forms an included angle of 45 degrees with the optical axis of the first 1/4 wave plate;
adjusting the second 1/4 wave plate so that the optical axis of the second 1/4 wave plate forms an angle of 45 degrees with the direction reflected by the reflecting device;
the incident light sequentially passes through the first 1/4 wave plate, the second 1/4 wave plate and the reflecting device to obtain polarization-maintaining reflected light;
the rotating device drives the second 1/4 wave plate and the reflecting device to rotate around the axis of incident light, so as to obtain the emergent polarization-maintaining reflected light with any angle.
9. The method as claimed in claim 7, wherein an 1/2 wave plate is disposed on the light path of the reflection device, and after the polarization-maintaining reflected light passes through the 1/2 wave plate, the polarization state of the reflected light can be deflected at any angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911000380.8A CN110596884B (en) | 2019-10-21 | 2019-10-21 | Device with adjustable polarization-preserving reflection angle and adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911000380.8A CN110596884B (en) | 2019-10-21 | 2019-10-21 | Device with adjustable polarization-preserving reflection angle and adjusting method thereof |
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| Publication Number | Publication Date |
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| CN110596884A true CN110596884A (en) | 2019-12-20 |
| CN110596884B CN110596884B (en) | 2021-05-04 |
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| CN201911000380.8A Active CN110596884B (en) | 2019-10-21 | 2019-10-21 | Device with adjustable polarization-preserving reflection angle and adjusting method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007052820A (en) * | 2005-08-12 | 2007-03-01 | Sharp Corp | Optical integrated unit and optical pickup device using it |
| CN102426163A (en) * | 2011-08-18 | 2012-04-25 | 天津大学 | Micro-raman spectrum experiment apparatus for adjustable polarization direction continuous collaboration/covariation |
| CN105182457A (en) * | 2015-09-21 | 2015-12-23 | 湖北久之洋红外系统股份有限公司 | Polarization-maintaining type cube-corner prism |
| CN106773034A (en) * | 2017-01-16 | 2017-05-31 | 浙江大学 | The common light path overall view ring belt optical imaging device of active polarization targets improvement |
| CN107250851A (en) * | 2015-02-19 | 2017-10-13 | 柯尼卡美能达株式会社 | The manufacture method of polarizer and polarizer |
-
2019
- 2019-10-21 CN CN201911000380.8A patent/CN110596884B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007052820A (en) * | 2005-08-12 | 2007-03-01 | Sharp Corp | Optical integrated unit and optical pickup device using it |
| CN102426163A (en) * | 2011-08-18 | 2012-04-25 | 天津大学 | Micro-raman spectrum experiment apparatus for adjustable polarization direction continuous collaboration/covariation |
| CN107250851A (en) * | 2015-02-19 | 2017-10-13 | 柯尼卡美能达株式会社 | The manufacture method of polarizer and polarizer |
| CN105182457A (en) * | 2015-09-21 | 2015-12-23 | 湖北久之洋红外系统股份有限公司 | Polarization-maintaining type cube-corner prism |
| CN106773034A (en) * | 2017-01-16 | 2017-05-31 | 浙江大学 | The common light path overall view ring belt optical imaging device of active polarization targets improvement |
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| CN110596884B (en) | 2021-05-04 |
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