CN210348084U - Optical system - Google Patents
Optical system Download PDFInfo
- Publication number
- CN210348084U CN210348084U CN201921199073.2U CN201921199073U CN210348084U CN 210348084 U CN210348084 U CN 210348084U CN 201921199073 U CN201921199073 U CN 201921199073U CN 210348084 U CN210348084 U CN 210348084U
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- Prior art keywords
- polarized light
- circularly polarized
- handed circularly
- polarization direction
- 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
- G02B27/28—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
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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
- G02B27/288—Filters employing polarising elements, e.g. Lyot or Solc filters
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T1/00—General purpose image data processing
- G06T1/0007—Image acquisition
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
- Polarising Elements (AREA)
Abstract
The utility model relates to the field of optical technology, especially, relate to an optical system to the realization is to the quick formation of image at object edge. The utility model discloses the system includes: a first device for filtering out linearly polarized light of a first polarization direction from external incident light; the second device is used for decomposing the incident linear polarized light in the first polarization direction into left-handed circularly polarized light and right-handed circularly polarized light and outputting the left-handed circularly polarized light and the right-handed circularly polarized light to the third device, wherein one of the left-handed circularly polarized light and the right-handed circularly polarized light is converged based on a real focus similar to a convex lens, and the other one of the left-handed circularly polarized light and the right-handed circularly polarized light is diverged based on a virtual focus similar to a; or the deflection angles of the output left circularly polarized light and the right circularly polarized light are opposite; and the third device at least has a working state for intercepting the light beam in the middle area where the left-handed circularly polarized light and the right-handed circularly polarized light are overlapped and transmitting the left-handed circularly polarized light or the right-handed circularly polarized light in the non-overlapped area of the edge.
Description
Technical Field
The utility model relates to the field of optical technology, especially, relate to an optical system.
Background
In the traditional edge imaging method, an overall image of an object is shot firstly by a physical means, and then the overall image is processed by an algorithm to extract image information of the edge of the object.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to disclose an optical system to the realization is to the quick formation of image at object edge.
To achieve the above object, the present invention discloses an optical system, including:
a first device for filtering out linearly polarized light of a first polarization direction from external incident light and outputting the linearly polarized light of the first polarization direction to a second device;
the second device is used for decomposing the incident linear polarized light in the first polarization direction into left-handed circularly polarized light and right-handed circularly polarized light and outputting the left-handed circularly polarized light and the right-handed circularly polarized light to the third device, wherein one of the left-handed circularly polarized light and the right-handed circularly polarized light is converged based on a real focus similar to a convex lens, and the other one of the left-handed circularly polarized light and the right-handed circularly polarized light is diverged based on a virtual focus similar to a concave; or the deflection angles of the output left circularly polarized light and the right circularly polarized light are opposite;
the third device at least has a working state to intercept the light beam in the middle area where the left-handed circularly polarized light and the right-handed circularly polarized light are overlapped and transmit the left-handed circularly polarized light or the right-handed circularly polarized light in the non-overlapped area of the edge.
The utility model discloses following beneficial effect has:
the method can be used for directly imaging the edge contour of the object, has the advantages of direct response and quick response, and has wide application prospects in the aspects of image processing, high-contrast microscopic imaging, object surface defect or particle detection and the like.
The present invention will be described in further detail below with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. In the drawings:
fig. 1 is a schematic diagram of an optical system disclosed in an embodiment of the present invention;
fig. 2 is a diagram of an image space beam region distribution disclosed in the embodiment of the present invention;
FIG. 3 is an edge imaging example disclosed in an embodiment of the present invention;
fig. 4 is a schematic diagram of state switching performed on a third device according to an embodiment of the present invention.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the drawings, but the invention can be implemented in many different ways as defined and covered by the claims.
Example one
The present embodiment discloses an optical system including:
the first device is used for filtering out the linear polarized light with the first polarization direction from the external incident light and outputting the linear polarized light with the first polarization direction to the second device.
The second device is used for decomposing the incident linear polarized light in the first polarization direction into left-handed circularly polarized light and right-handed circularly polarized light and outputting the left-handed circularly polarized light and the right-handed circularly polarized light to the third device, wherein one of the left-handed circularly polarized light and the right-handed circularly polarized light is converged based on a real focus similar to a convex lens, and the other one of the left-handed circularly polarized light and the right-handed circularly polarized light is diverged based on a virtual focus similar to a; or the deflection angle of the output left circularly polarized light is opposite to that of the right circularly polarized light.
And the third device at least has a working state for intercepting the light beam in the middle area where the left-handed circularly polarized light and the right-handed circularly polarized light are overlapped and transmitting the left-handed circularly polarized light or the right-handed circularly polarized light in the non-overlapped area of the edge.
Preferably, the third device of this embodiment has at least one specific position corresponding to the first device to intercept the linearly polarized light of the first polarization direction; in the middle area where the left circularly polarized light and the right circularly polarized light are overlapped, the left circularly polarized light and the right circularly polarized light interfere with each other to restore the linearly polarized light in the first polarization direction. Specifically, the first device may be a linear polarizer with a first polarization direction, the third device may be a linear polarizer with a second polarization direction, and the second polarization direction is perpendicular to the first polarization direction.
Optionally, the second device of this embodiment may be implemented by a superlens or other devices to converge a real focus based on a similar convex lens and diverge a virtual focus based on a similar concave lens in left-handed and right-handed circularly polarized lights. The deflection angle of the output left circularly polarized light and the right circularly polarized light can be opposite by devices such as a polarization grating and the like. In general, a superlens may be made of a metal or dielectric supersurface; the super-surface is an ultrathin two-dimensional array plane consisting of a series of sub-wavelength artificial microstructures, has the characteristics of relatively simple manufacture, relatively low loss, small volume, ultrathin thickness and the like, and can realize effective regulation and control on the aspects of amplitude, phase, propagation mode, polarization state and the like of electromagnetic waves.
As shown in fig. 1, the embodiment of the present invention discloses a specific example of applying the above optical system, in this example, the optical system may be referred to as a superlens-based optical edge imaging device, which includes a linear polarizer 3, a superlens 4, and a linear polarizer 5 orthogonal to the polarization direction of the linear polarizer 3. In front of the imaging device, an illumination light source 1 and an illuminated object 2 are also provided. Optionally, a collimating mirror may be disposed between the illumination light source 1 and the illuminated object 2, and after the linear polarization device 5.
The object beam passes through the linear polarizer 3 and becomes linearly polarized light to be incident on the superlens. The superlens decomposes incident linearly polarized light into left-handed circularly polarized light and right-handed circularly polarized light for emergence. The outgoing left-handed circularly polarized light is converged, corresponding to the positive focal length, the right-handed circularly polarized light is diverged, and corresponding to the negative focal length. The positive and negative focal length absolute values of the superlens are very large, the convergence and divergence angles are very small, and the converged left-handed circularly polarized light and the diverged right-handed circularly polarized light on the image side have a light intensity overlapping area. In the light intensity overlapping region, the left circularly polarized light and the right circularly polarized light interfere with each other to become linearly polarized light, the polarization direction of the interfered linearly polarized light is the same as the vibration direction of the incident linearly polarized light and is orthogonal to the polarization direction of the linear polarizer 5, and in the light intensity non-overlapping region, the emergent light still maintains a circular polarization state (left-handed or right-handed) as shown in fig. 2. Thus light in the region where the intermediate intensities overlap will not be transmitted through the linear polarizer 5, while half of the light energy in the circularly polarized outgoing light in the region where the edge intensities do not overlap will be transmitted through the linear polarizer 5. The final exit from the linear polarizer 5 is an image of the edge of the object. Assuming that the illuminated object 2 is shaped as shown in fig. 3, the edge image is shown as image 6 in fig. 3 after the object 2 is imaged by the optical edge imaging system, as shown in fig. 3.
Example two
The present embodiment is further improved on the basis of the first embodiment. The concrete improvement lies in that: at least one of the first and third devices is capable of position switching such that, upon position switching: the third device transmits linearly polarized light of the first polarization direction.
The optical system (or may be called an edge imaging device) of the second embodiment includes a linear polarizer 7, a superlens 8, and a linear polarizer 9 mounted in a rotatable mechanism. When linear polarizer 9 is rotated to a polarization direction orthogonal to the polarization direction of linear polarizer 7, as in fig. 4, light in the region of the overlap of the middle light intensities will not be transmitted through linear polarizer 9, while circularly polarized outgoing light in the region of the non-overlap of the edge light intensities will have half the light energy transmitted through linear polarizer 9. The final exit from the linear polarizer 9 is an image of the edge of the object, where the device functions as in the first embodiment. When the linear polarizer 9 is rotated to have the polarization direction parallel to the polarization direction of the linear polarizer 7, the linearly polarized light in the light intensity overlapping region can also transmit through the linear polarizer 9, and the observed object can be imaged completely. Therefore, the second embodiment realizes free switching between complete imaging and edge imaging of the object.
To sum up, the utility model discloses the optical system that each above-mentioned embodiment was disclosed respectively has following beneficial effect:
the method can be used for directly imaging the edge contour of the object, has the advantages of direct response and quick response, and has wide application prospects in the aspects of image processing, high-contrast microscopic imaging, object surface defect or particle detection and the like.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. An optical system, comprising:
a first device for filtering out linearly polarized light of a first polarization direction from external incident light and outputting the linearly polarized light of the first polarization direction to a second device;
the second device is used for decomposing the incident linear polarized light in the first polarization direction into left-handed circularly polarized light and right-handed circularly polarized light and outputting the left-handed circularly polarized light and the right-handed circularly polarized light to the third device, wherein one of the left-handed circularly polarized light and the right-handed circularly polarized light is converged based on a real focus similar to a convex lens, and the other one of the left-handed circularly polarized light and the right-handed circularly polarized light is diverged based on a virtual focus similar to a concave; or the deflection angles of the output left circularly polarized light and the right circularly polarized light are opposite;
the third device at least has a working state to intercept the light beam in the middle area where the left-handed circularly polarized light and the right-handed circularly polarized light are overlapped and transmit the left-handed circularly polarized light or the right-handed circularly polarized light in the non-overlapped area of the edge.
2. The optical system of claim 1, wherein the third device has at least one specific position corresponding to the first device to intercept the linearly polarized light of the first polarization direction;
in the middle area where the left circularly polarized light and the right circularly polarized light are overlapped, the left circularly polarized light and the right circularly polarized light interfere with each other to restore the linearly polarized light in the first polarization direction.
3. The optical system of claim 2, wherein the first device is a linear polarizer of a first polarization direction, the third device is a linear polarizer of a second polarization direction, and the second polarization direction is perpendicular to the first polarization direction.
4. An optical system as claimed in claim 1, 2 or 3, characterized in that at least one of the first and third means is position-switchable such that, after position switching: the third device transmits linearly polarized light of the first polarization direction.
5. An optical system according to claim 1 or 2, further comprising a first collimating mirror arranged between an external light source and the first device, and/or comprising a second collimating mirror arranged after the third device has emitted the light beam.
6. An optical system according to claim 1 or 2, characterized in that the optical system is applied for edge contour imaging.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910674469 | 2019-07-25 | ||
| CN2019106744696 | 2019-07-25 |
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| Publication Number | Publication Date |
|---|---|
| CN210348084U true CN210348084U (en) | 2020-04-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910686824.1A Active CN110456520B (en) | 2019-07-25 | 2019-07-29 | Optical system, edge contour extraction method and system, and computer storage medium |
| CN201921199073.2U Withdrawn - After Issue CN210348084U (en) | 2019-07-25 | 2019-07-29 | Optical system |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910686824.1A Active CN110456520B (en) | 2019-07-25 | 2019-07-29 | Optical system, edge contour extraction method and system, and computer storage medium |
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| CN (2) | CN110456520B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456520A (en) * | 2019-07-25 | 2019-11-15 | 深圳市麓邦技术有限公司 | Optical system, edge contour extracting method and system, computer storage medium |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20210068672A (en) * | 2019-12-02 | 2021-06-10 | 에스엘 주식회사 | Optical lens and illuminating device using the same |
| CN113189783A (en) * | 2021-04-14 | 2021-07-30 | 深圳市麓邦技术有限公司 | Optical system and liquid crystal moire lens |
| CN113655548A (en) * | 2021-07-08 | 2021-11-16 | 湖南大学 | Optical edge detection design method and device based on super-structured surface |
| CN115439422B (en) * | 2022-08-21 | 2023-03-28 | 哈尔滨理工大学 | Two-dimensional space differential operation and image edge detection method and device |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0339605A (en) * | 1989-07-05 | 1991-02-20 | Brother Ind Ltd | Optical surface shape measuring instrument |
| US8014069B2 (en) * | 2005-04-01 | 2011-09-06 | University Of Rochester | Polarization converter, optical system, method and applications |
| US9612449B2 (en) * | 2012-02-08 | 2017-04-04 | Saitama Medical University | Axially symmetric polarization conversion element |
| US10386558B2 (en) * | 2013-03-13 | 2019-08-20 | Imagineoptix Corporation | Polarization conversion systems with geometric phase holograms |
| JP6529111B2 (en) * | 2014-12-12 | 2019-06-12 | 国立研究開発法人情報通信研究機構 | Broadband circularly polarized antenna |
| EP3070641B1 (en) * | 2015-03-11 | 2021-11-24 | Ricoh Company, Ltd. | Vehicle body with imaging system and object detection method |
| JP2019028860A (en) * | 2017-08-02 | 2019-02-21 | 東芝テック株式会社 | Article imaging device |
| CN109375397B (en) * | 2018-12-12 | 2021-04-30 | 浙江理工大学 | Orthogonal circularly polarized light ranging system based on vector vortex light beams |
| CN110456520B (en) * | 2019-07-25 | 2023-09-15 | 深圳市麓邦技术有限公司 | Optical system, edge contour extraction method and system, and computer storage medium |
-
2019
- 2019-07-29 CN CN201910686824.1A patent/CN110456520B/en active Active
- 2019-07-29 CN CN201921199073.2U patent/CN210348084U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456520A (en) * | 2019-07-25 | 2019-11-15 | 深圳市麓邦技术有限公司 | Optical system, edge contour extracting method and system, computer storage medium |
| CN110456520B (en) * | 2019-07-25 | 2023-09-15 | 深圳市麓邦技术有限公司 | Optical system, edge contour extraction method and system, and computer storage medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110456520A (en) | 2019-11-15 |
| CN110456520B (en) | 2023-09-15 |
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20200417 Effective date of abandoning: 20230915 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20200417 Effective date of abandoning: 20230915 |