CN109343194A - A method of the girdle prisms such as utilize to disappear image rotation - Google Patents
A method of the girdle prisms such as utilize to disappear image rotation Download PDFInfo
- Publication number
- CN109343194A CN109343194A CN201811549249.2A CN201811549249A CN109343194A CN 109343194 A CN109343194 A CN 109343194A CN 201811549249 A CN201811549249 A CN 201811549249A CN 109343194 A CN109343194 A CN 109343194A
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- CN
- China
- Prior art keywords
- light beam
- central plane
- girdle prisms
- prisms
- equal
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/18—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors
- G02B7/1805—Mountings, adjusting means, or light-tight connections, for optical elements for prisms; for mirrors for prisms
Abstract
The girdle prisms such as utilize to disappear the method for image rotation the invention discloses a kind of, comprising: incident beam to be irradiated to the first central plane of equal girdle prisms, the optical axis of the incident beam is parallel to the bottom surface of equal girdle prisms；The equal girdle prisms are emitted onto 180 ° of the Beam rotation on the first central plane, obtain postrotational light beam, the optical axis of postrotational light beam and the optical axis of incident beam are parallel；The postrotational light beam is irradiated on imaging optical system.The present invention girdle prisms such as utilizes to be emitted onto the incident beam on the first central plane to rotate 180 °, obtain postrotational light beam, then the postrotational light beam is irradiated on imaging optical system, obtain the image stablized without spin, realize the effect for the image rotation that disappears.Equal girdle prisms have many advantages, such as that small in size, light-weight, can to compress optical path, processing adjustment technique simpler, solve in the existing image rotation method that disappears K mirror body product greatly tooling tune is difficult, Dove prism size length and the problems such as be unsuitable for parallel light path than heavier, benhain prism.
Description
Technical field
It is especially a kind of the girdle prisms such as to utilize to disappear the method for image rotation the invention belongs to optical technical field.
Background technique
Electro-optical system is it can be found that target and provide corresponding environmental goals information.This kind of system generallys use scanning device
The spatial information of comprehensive, big visual field is obtained around the mode of optical axis rotation, this scanning mode will cause the vertical of object space
Line does not keep constant angle with detector, and reflection image generates rotation along optical axis, i.e., formed image can be with reflecting mirror on detector
Scanning and rotate.In order to obtain the image stablized without spin, it is necessary to the image rotation device that disappears be added in systems.Common optics disappears
Image rotation device includes K mirror, Dove prism, benhain prism etc..K mirror is made of the reflecting mirror that three pieces are arranged in K font, processes adjustment
Difficulty is larger, and volume is usually larger.The Dove prism radius of gyration is smaller, processing adjustment technique it is simple with respect to K mirror, but size compared with
Long, overall weight is larger, also larger to the load of motor.Benhain prism is commonly used in Path of Convergent Rays, if for parallel light path
There are larger-size problems；Furthermore benhain prism is formed by two prism arrangements, and processing alignment error is larger.
Summary of the invention
The embodiment of the present invention provide it is a kind of the girdle prisms such as utilize to disappear the method for image rotation, to solve in the existing image rotation method that disappears
The problems such as K mirror body accumulates difficult greatly tooling tune, Dove prism size length and is unsuitable for parallel light path than heavier, benhain prism.
The embodiment of the present invention, which provides, a kind of the girdle prisms such as utilizes to disappear the method for image rotation, comprising:
Incident beam is irradiated to the first central plane of equal girdle prisms, the optical axis of the incident beam, which is parallel to, waits girdle prisms
Bottom surface；
The equal girdle prisms are emitted onto 180 ° of the Beam rotation on the first central plane, postrotational light beam are obtained, after rotation
Light beam optical axis it is parallel with the optical axis of incident beam；
The postrotational light beam is irradiated on imaging optical system.
Optionally, the equal girdle prisms are emitted onto 180 ° of the rotation of the incident beam on the first central plane, obtain postrotational
Light beam specifically includes:
First central plane of equal girdle prisms reflects incident beam in first central plane, obtains the first light beam；
Second central plane of equal girdle prisms is totally reflected the first light beam in second central plane, obtains the second light beam；
The bottom surface of equal girdle prisms reflects the second light beam in the bottom surface, obtains third light beam；
First central plane of equal girdle prisms is totally reflected third light beam in first central plane, obtains the 4th light beam；
Second central plane of equal girdle prisms reflects the 4th light beam in second central plane, obtains the 5th light beam, and the 5th
Light beam is the postrotational light beam.
Optionally, before first central plane that incident beam is irradiated to equal girdle prisms, further includes:
Optical axis rotation of the equal girdle prisms around incident beam, the sweep mechanism direction of rotation phase of direction of rotation and electro-optical system
Instead, and revolving speed is the 1/2 of sweep mechanism revolving speed.
Optionally, before first central plane that incident beam is irradiated to equal girdle prisms, comprising:
The bore of incident beam is reduced into presupposition multiple.
Optionally, the optical axis coincidence of the optical axis of the postrotational light beam and incident beam.
Optionally, the incident beam is collimated light beam.
The present invention girdle prisms such as utilizes to be emitted onto the incident beam on the first central plane to rotate 180 °, obtain postrotational light
Beam, then the postrotational light beam is irradiated on imaging optical system, the image stablized without spin is obtained, realizes the image rotation that disappears
Effect.Equal girdle prisms have many advantages, such as that small in size, light-weight, can to compress optical path, processing adjustment technique simpler, solve and show
There are the long-pending greatly tooling tune hardly possible of K mirror body, Dove prism size length in the image rotation method that disappears and is unsuitable for directional light than heavier, benhain prism
The problems such as road.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects of the present invention, feature and advantage can
It is clearer and more comprehensible, the followings are specific embodiments of the present invention.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Fig. 1 be the embodiment of the present invention it is a kind of utilize etc. girdle prisms disappear image rotation method flow chart；
Fig. 2 be the embodiment of the present invention it is a kind of utilize etc. girdle prisms disappear image rotation the medium girdle prism of method stereochemical structure signal
Figure；
Fig. 3 be the embodiment of the present invention it is a kind of utilize etc. girdle prisms disappear image rotation the medium girdle prism of method structural schematic diagram；
Fig. 4 be the embodiment of the present invention it is a kind of utilize etc. girdle prisms disappear image rotation method in collimated light beam index path；
Fig. 5 be the embodiment of the present invention it is a kind of utilize etc. girdle prisms disappear image rotation method in different field angle light beams optical path
Figure；
Fig. 6 be the embodiment of the present invention it is a kind of utilize etc. girdle prisms disappear image rotation method in optical transfer function MTF curve figure；
Fig. 7 be the embodiment of the present invention it is a kind of utilize etc. girdle prisms disappear image rotation the medium girdle prism of method scale diagrams.
Specific embodiment
Exemplary embodiments of the present disclosure are described in more detail below with reference to accompanying drawings.Although showing the disclosure in attached drawing
Exemplary embodiment, it being understood, however, that may be realized in various forms the disclosure without should be by embodiments set forth here
It is limited.On the contrary, these embodiments are provided to facilitate a more thoroughly understanding of the present invention, and can be by the scope of the present disclosure
It is fully disclosed to those skilled in the art.
First embodiment of the invention provide it is a kind of the girdle prisms such as utilize to disappear the method for image rotation, as shown in Figs 1-4, including following
Specific steps:
Incident beam, is irradiated to the first central plane of equal girdle prisms by S101, and the optical axis of the incident beam is parallel to isosceles
The bottom surface of prism；
S102, the equal girdle prisms are emitted onto 180 ° of the Beam rotation on the first central plane, obtain postrotational light beam, revolve
The optical axis of light beam after turning is parallel with the optical axis of incident beam；
The equal girdle prisms are emitted onto the incident beam on the first central plane and rotate 180 °, obtain postrotational light beam, have
Body includes:
First central plane of equal girdle prisms reflects incident beam in first central plane, obtains the first light beam；
Second central plane of equal girdle prisms is totally reflected the first light beam in second central plane, obtains the second light beam；
The bottom surface of equal girdle prisms reflects the second light beam in the bottom surface, obtains third light beam；
First central plane of equal girdle prisms is totally reflected third light beam in first central plane, obtains the 4th light beam；
Second central plane of equal girdle prisms reflects the 4th light beam in second central plane, obtains the 5th light beam, and the 5th
Light beam is the postrotational light beam.
Equal girdle prisms base angle angle should ensure that light beam meets total reflection condition in the first central plane and the second central plane.Existed with light beam
For first central plane inner total reflection, light is from optically denser medium (the biggish material of refractive index, such as the selenizing Zinc material of equal girdle prisms)
When into optically thinner medium (the lesser material of refractive index, such as the air on the first central plane left side), if incident angle > arcsinn
(refractive index that n is optically denser medium), then be totally reflected.
The postrotational light beam is irradiated on imaging optical system by S103.
The present invention girdle prisms such as utilizes to be emitted onto the incident beam on the first central plane to rotate 180 °, obtain postrotational light
Beam, then the postrotational light beam is irradiated on imaging optical system, the image stablized without spin is obtained, realizes the image rotation that disappears
Effect.Equal girdle prisms have many advantages, such as that small in size, light-weight, can to compress optical path, processing adjustment technique simpler, solve and show
There are the long-pending greatly tooling tune hardly possible of K mirror body, Dove prism size length in the image rotation method that disappears and is unsuitable for directional light than heavier, benhain prism
The problems such as road.
It is provided in an embodiment of the present invention it is a kind of the girdle prisms such as utilize to disappear the method for image rotation, can be used for imaging system, rise and disappear
Image rotation effect, especially suitable for carrying out the electro-optical system of panorama scanning, before not changing system optics performance and image quality
It puts, realizes the function for the image rotation that disappears, system is made to obtain the image stablized without spin.Specifically, described be irradiated to incident beam
Before first central plane of equal girdle prisms, wait girdle prisms around the optical axis rotation of incident beam, the scanning of direction of rotation and electro-optical system
Mechanism direction of rotation is on the contrary, and revolving speed is the 1/2 of sweep mechanism revolving speed.Equal girdle prisms and the sweep mechanism of electro-optical system cooperate,
It is final to can get the image stablized without spin, realize the image rotation that disappears.
It is provided in an embodiment of the present invention it is a kind of the girdle prisms such as utilize to disappear the method for image rotation, propose using etc. girdle prisms disappear
Image rotation, design principle is simple, and isosceles prism small volume can further decrease instrument size, light-weight, and processing adjustment is held
Easily, optical path length can be compressed, processing adjustment technique is relatively simple, reduces the load to motor.Prism material can use selenium
Change zinc, anti-reflection film can be plated in the first central plane and the second central plane, internal reflection film can be plated in bottom surface.
Optionally, before first central plane that incident beam is irradiated to equal girdle prisms, comprising:
According to actual needs, the bore of incident beam is reduced into presupposition multiple.
Optionally, the optical axis coincidence of the optical axis of the postrotational light beam and incident beam, the incident beam are parallel
Light beam, outgoing beam and incident beam meet the condition of 180 ° of rotation.
As shown in figure 5, give the present invention it is a kind of utilize etc. girdle prisms disappear image rotation method one embodiment.Along optical axis
Direction of advance, successively include front end telescopic system, etc. girdle prisms and imaging optical system.Wherein, front end telescopic system, etc. girdles
The optical axis coincidence of mirror and imaging optical system constitutes the optical axis of this optical system.The prestige that front end telescopic system is 3 times of enlargement ratio
The beam size of girdle prisms such as being incident to is reduced 3 times by remote mirror, to be substantially reduced the part size for waiting girdle prisms and revolution half
Diameter, further can reduced equipment sizes, reduce load to motor.The girdle prisms such as the image rotation that disappears use selenizing Zinc material, size
As shown in Figure 7.
The optical device system parameter of embodiment is as follows:
System service band: 7.7~10.3 μm；
System focal length: 180mm；
System F number: 4；
Detector: 320 × 256；
Pixel dimension: 25 μm；
Following table is the optical parameter table of specific embodiment 1:
The optical imaging concept of the present embodiment are as follows:
Collimated light beam, into front end telescopic system, by the collimated light beam for forming 3 times of bore diminution after telescopic system.It is flat
Row light beam is incident to equal girdle prisms, is successively all-trans through the refraction of the first central plane, the second central plane total reflection, bottom reflection, the first central plane
Penetrate with after the refraction of the second central plane, outgoing beam has rotated 180 ° relative to incident beam, postrotational light beam enter it is subsequent at
As optical system, the image stablized without spin finally can get, solve the long-pending greatly tooling of K mirror body in the existing image rotation method that disappears
The problems such as adjusting difficult, Dove prism size length and being unsuitable for parallel light path than heavier, benhain prism.
Fig. 6 is the modulation transfer function curve of embodiment, and for each visual field MTF close to diffraction limit, image quality is good
It is good.
Front end telescopic system can be transmission-type or reflective optical system, and front end telescopic system and imaging optical system can
It is designed according to system situation, using different materials, face shape or structure type.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The serial number of the above embodiments of the invention is only for description, does not represent the advantages or disadvantages of the embodiments.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can be realized by means of software and necessary general hardware platform, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on this understanding, technical solution of the present invention substantially in other words does the prior art
The part contributed out can be embodied in the form of software products, which is stored in a storage medium
In (such as ROM/RAM, magnetic disk, CD), including some instructions are used so that a terminal (can be mobile phone, computer, service
Device, air conditioner or network equipment etc.) execute method described in each embodiment of the present invention.
The embodiment of the present invention is described with above attached drawing, but the invention is not limited to above-mentioned specific
Embodiment, the above mentioned embodiment is only schematical, rather than restrictive, those skilled in the art
Under the inspiration of the present invention, without breaking away from the scope protected by the purposes and claims of the present invention, it can also make very much
Form, all of these belong to the protection of the present invention.
Claims (6)
1. a kind of the girdle prisms such as utilize to disappear the method for image rotation characterized by comprising
Incident beam is irradiated to the first central plane of equal girdle prisms, the optical axis of the incident beam is parallel to the bottom for waiting girdle prisms
Face；
The equal girdle prisms are emitted onto 180 ° of the Beam rotation on the first central plane, obtain postrotational light beam, postrotational light
The optical axis of beam and the optical axis of incident beam are parallel；
The postrotational light beam is irradiated on imaging optical system.
2. the method as described in claim 1, which is characterized in that the equal girdle prisms are emitted onto the incident light on the first central plane
180 ° of Shu Xuanzhuan, postrotational light beam is obtained, is specifically included:
First central plane of equal girdle prisms reflects incident beam in first central plane, obtains the first light beam；
Second central plane of equal girdle prisms is totally reflected the first light beam in second central plane, obtains the second light beam；
The bottom surface of equal girdle prisms reflects the second light beam in the bottom surface, obtains third light beam；
First central plane of equal girdle prisms is totally reflected third light beam in first central plane, obtains the 4th light beam；
Second central plane of equal girdle prisms reflects the 4th light beam in second central plane, obtains the 5th light beam, the 5th light beam
The as described postrotational light beam.
3. the method as described in claim 1, which is characterized in that first central plane that incident beam is irradiated to equal girdle prisms
Before, further includes:
Equal girdle prisms around incident beam optical axis rotation, the sweep mechanism direction of rotation of direction of rotation and electro-optical system on the contrary, and
Revolving speed is the 1/2 of sweep mechanism revolving speed.
4. the method as described in claim 1, which is characterized in that first central plane that incident beam is irradiated to equal girdle prisms
Before, comprising:
The bore of incident beam is reduced into presupposition multiple.
5. the method as described in claim 1, which is characterized in that the optical axis of the postrotational light beam and the optical axis of incident beam
It is overlapped.
6. the method as described in claim 1, which is characterized in that the incident beam is collimated light beam.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811549249.2A CN109343194A (en) | 2018-12-18 | 2018-12-18 | A method of the girdle prisms such as utilize to disappear image rotation |
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| CN201811549249.2A CN109343194A (en) | 2018-12-18 | 2018-12-18 | A method of the girdle prisms such as utilize to disappear image rotation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110989188A (en) * | 2019-12-18 | 2020-04-10 | 华中科技大学 | K mirror optical system adjusting method |
| CN111736361A (en) * | 2020-07-01 | 2020-10-02 | 中国科学院上海技术物理研究所 | Reflective image elimination rotation assembly optical correction method for space optical remote sensing instrument |
| CN112198624A (en) * | 2020-09-22 | 2021-01-08 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Method and system for assembling and adjusting optical despin K-mirror assembly |
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| CN202330773U (en) * | 2011-11-02 | 2012-07-11 | 中国科学院西安光学精密机械研究所 | Multichannel optical fiber rotary joint with imaging function |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110989188A (en) * | 2019-12-18 | 2020-04-10 | 华中科技大学 | K mirror optical system adjusting method |
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| CN111736361A (en) * | 2020-07-01 | 2020-10-02 | 中国科学院上海技术物理研究所 | Reflective image elimination rotation assembly optical correction method for space optical remote sensing instrument |
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| CN112198624B (en) * | 2020-09-22 | 2022-08-09 | 华中光电技术研究所（中国船舶重工集团公司第七一七研究所） | Method and system for assembling and adjusting optical despun K-mirror assembly |
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Application publication date: 20190215 |