CN105572856A - Virtual periscope and production method and application thereof - Google Patents
Virtual periscope and production method and application thereof Download PDFInfo
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- CN105572856A CN105572856A CN201610124300.XA CN201610124300A CN105572856A CN 105572856 A CN105572856 A CN 105572856A CN 201610124300 A CN201610124300 A CN 201610124300A CN 105572856 A CN105572856 A CN 105572856A
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- polaroid
- periscope
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/02—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices involving prisms or mirrors
- G02B23/08—Periscopes
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/12—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices with means for image conversion or intensification
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- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
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- Blocking Light For Cameras (AREA)
Abstract
The invention provides a virtual periscope and a production method and an application thereof. The virtual periscope comprises a lens, which is suitable of being arranged underwater and is used for receiving light rays from a waterborne target object and enabling the waterborne target object to be imaged on a photosensitive element; the photosensitive element, which is used for converting the image signal into an electrical signal, and inputting the electrical signal to a display element; the display element, which is used for converting the electrical signal into an image and outputting the image; and a light filtering member, which is arranged between the lens and the photosensitive element, and is used for filtering out interference rays which pass through the lens but do not reflect shape information of the waterborne target object, wherein the interference rays are scattered rays generated when the light rays refracted by sea surface from the air into water are scattered by seawater molecules. The virtual periscope adopts the light filtering member to filter out the interference rays, so that interference can be reduced or eliminated, imaging contrast is improved, and imaging quality of the virtual periscope is improved.
Description
Technical field
The present invention relates to facilities for observation technical field, being specifically related to a kind of virtual periscope from observing object waterborne and production method thereof and application under water.
Background technology
Virtual periscope is the major equipment observed the water surface, aerial target thing of carrying platform (as submarine, UUV, AUV, ROV, diving apparatus etc.) under water.Virtual periscope uses under water, and it generally comprises camera lens, photo-sensitive cell and display element, and the light that object waterborne sends is after the refraction of water, through camera lens, imaging on photo-sensitive cell, and exported by display element, thus under water object waterborne is observed for people.But in actual applications, virtual periscope sharpness of the prior art is poor, and those skilled in the art once carried out repeatedly research of technique, does not all find good solution.
At present, in virtual periscope technical field, improving image quality is Key technique problem.Inventor is through repeatedly studying discovery for a long time, and after water surface incidence, a part directly can penetrate water layer to light in air (comprise object waterborne send), and after camera lens, imaging on photo-sensitive cell, is exported by display element; Another part then can scattering under the effect of hydrone, this part light after scattering also can imaging on photo-sensitive cell after camera lens, and exported by display element, but the light after this part scattering does not carry the information of object waterborne, that is, the light of this part scattering is imaging not object shape information in reaction water on photo-sensitive cell, thus causes infringement to the contrast of virtual periscope, and directly results in the defect of virtual periscope poor definition.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is the technological deficiency overcoming virtual periscope imaging definition difference of the prior art, thus provides the virtual periscope that a kind of imaging definition is good.
The present invention also provides a kind of production method of above-mentioned virtual periscope.
For this reason, the invention provides a kind of virtual periscope, comprising:
Camera lens, is suitable for being arranged under water, for receiving the light from object waterborne, and is imaged on photo-sensitive cell by described object waterborne;
Photo-sensitive cell, for image signal is converted into electric signal, and inputs to display element;
Display element, for becoming image to export described transform electrical signals;
Described camera lens also comprises light filtration members, is arranged between described camera lens and described photo-sensitive cell, for will be passed, but not reflect that the interference light of described object shape information waterborne filters removal;
Described interference light is reflect from aerial the scattered beam entering the light in water and produced by sea water molecular scattering through sea.
As a kind of preferred version, described smooth filtration members is polaroid, and be arranged on the focal plane of described camera lens, described polaroid has center, and described polaroid at least has a part, on it, the polarization direction of any point is parallel with the line direction at described center with this point; Further, described polaroid through the centre normal at described center and the optical axis coincidence of described camera lens.
As a kind of preferred version, described polaroid whole, on it, the polarization direction of any point is parallel with the line direction at described center with this point.
As a kind of preferred version, described polaroid is combined to form by several the fan-shaped sub-polaroids being summit with described center, and the polarization direction of described fan-shaped sub-polaroid is parallel with the angular bisector direction of its central angle.
As a kind of preferred version, described polaroid is combined to form by least 4 described fan-shaped sub-polaroids, and the central angle angle of any two described fan-shaped sub-polaroids is identical.
As a kind of preferred version, also comprise the rotational structure for driving described polaroid to rotate around described centre normal.
As a kind of preferred version, the angular velocity that described rotational structure drives described polaroid to rotate is greater than 40 revolutions per seconds.
The present invention also provides a kind of production method of virtual periscope as above, is included in the step arranging described smooth filtration members between described camera lens and described photo-sensitive cell.
The present invention also provides the application of a kind of virtual periscope as above under water on carrying platform.
Described carrying platform under water comprises: submarine, UUV (UnmannedUnderwaterVehicle, UAV navigation), AUV (AutonomousUnderwaterVehicle, Autonomous Underwater Vehicle), ROV (RemoteOperatedVehicle, remote control aircraft), diving apparatus.
Virtual periscope provided by the invention and production method thereof and application, have the following advantages:
1. virtual periscope of the present invention, light filtration members is added between camera lens and photo-sensitive cell, for will through camera lens, but do not reflect that the interference light of object shape information waterborne filters and remove, this part interference light refers to that refraction enters the scattered beam that the light in water produced by sea water molecular scattering through sea from aerial; Because this part scattered beam is light virtual periscope contrast being produced to infringement, after thus adopting above-mentioned smooth filtration members to be filtered removal, can reduce or eliminate above-mentioned infringement, improve image contrast, and then improve the image quality of virtual periscope.
2. virtual periscope of the present invention, adopt polaroid as light filtration members, be arranged on the focal plane of camera lens, arrange polaroid and at least have a part, on it, the polarization direction of any point is parallel with the line direction at described center with this point; Further, polaroid through the centre normal at above-mentioned center and the optical axis coincidence of camera lens;
Theoretical according to Rayleigh scattering, the scattered light formed after molecular scattering belongs to partial poolarized light, and this part scattered light to have perpendicular to incident ray and scattered beam form the first direction of vibration of plane, and be parallel to the second direction of vibration of this plane, and the first direction of vibration is preponderated;
By camera lens just to incident ray, the optical axis of centre normal, camera lens and incident ray are overlapped, a then part for above-mentioned polaroid, its polarization direction is vertical with above-mentioned first direction of vibration, thus this partial dispersion light can be stoped to pass, and then stop its imaging on photo-sensitive cell, thus improve image quality;
According to radiation transfer theory in ocean, the light entered in water is reflected through sea from aerial, when the degree of depth is greater than certain numerical value (as 40m), the light vertically propagated downwards occupies advantage, thus when by camera lens horizontal positioned, when making the light propagated straight down pass perpendicularly through camera lens, at utmost can filter interference light (scattered beam produced by the light generation molecular scattering of propagating straight down), improve image quality.
Polaroid is arranged on the focal plane of camera lens, the directional light with same nature can be gathered in the same point on polaroid, and then concentration filter removes stray light, improves image quality further.
3. virtual periscope of the present invention, on whole polaroid, the polarization direction of any point is parallel with the line direction at described center with this point, such polaroid can at utmost filter interference light, and thus for raising image contrast, the image quality effect improving virtual periscope is best.
4. virtual periscope of the present invention, polaroid is combined to form by several the fan-shaped sub-polaroids taking center as summit, and the polarization direction of fan-shaped sub-polaroid and the angular bisector direction of its central angle parallel, such setting, can when making the polarization direction of polaroid vertical with the polarization direction of interference light as far as possible, reduce manufacture difficulty, reduce manufacturing cost.Preferred, arrange polaroid to be combined to form by least 4 fan-shaped sub-polaroids, and the central angle angle of any two fan-shaped sub-polaroids is identical, polaroid each several part can be made all to have the ability of filtering above-mentioned interference light, to reach the object improving virtual periscope image contrast.
5. virtual periscope of the present invention, also comprise the rotational structure for driving polaroid to rotate around centre normal, when polaroid is combined to form by multiple sub-polaroid, between two adjacent sub-polaroids, there is seam, when using virtual periscope to observe object waterborne, starting rotational structure, it is made to drive polaroid to rotate, and pilot angle speed is greater than 40 revolutions per seconds, the impact that the light tight printing opacity caused of seaming position is uneven can be eliminated, be conducive to improving image quality.
6. the present invention also provides a kind of production method of virtual periscope, be included in the step that light filtration members is set between camera lens and photo-sensitive cell, adopt production method of the present invention to make the virtual periscope obtained, interference light can be eliminated, there is the advantage improving image contrast.
7. virtual periscope provided by the invention can also application under water on carrying platform, comprises and is not limited to submarine, UUV, AUV, ROV, diving apparatus etc.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in prior art or the specific embodiment of the invention, the accompanying drawing used in describing prior art or embodiment is below briefly described, apparently, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structure principle chart of virtual periscope in embodiment 1.
Fig. 2 is the three-dimensional structure diagram of Fig. 1.
Fig. 3 is the relative position relation figure of camera lens in Fig. 1, light filtration members and photo-sensitive cell.
Fig. 4 is the structure principle chart of light filtration members in Fig. 3.
Reference numeral: 1-camera lens, 2-photo-sensitive cell, 3-display element, 4-light filtration members, the fan-shaped sub-polaroid of 5-, 6-centre normal, 7-optical axis.
Embodiment
Be described technical scheme of the present invention below in conjunction with Figure of description, obviously, following embodiment is not the whole embodiment of the present invention.Based on embodiment described in the invention, those of ordinary skill in the art, not making the every other embodiment obtained under other creative work prerequisites, belong to protection scope of the present invention.
It should be noted that, in describing the invention, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance.In addition, if below in the described different embodiment of the present invention involved technical characteristic do not form conflict each other and just can be combined with each other.
Embodiment 1
The present embodiment provides a kind of virtual periscope, as depicted in figs. 1 and 2, comprising: camera lens 1, is suitable for being arranged under water, for receiving the light from object waterborne, and is imaged on photo-sensitive cell 2 by described object waterborne; Photo-sensitive cell 2, for image signal is converted into electric signal, and inputs to display element 3; Display element 3, for becoming image to export described transform electrical signals; Described camera lens 1 also comprises light filtration members 4, is arranged between described camera lens 1 and described photo-sensitive cell 2, for will be passed, but not reflect that the interference light of described object shape information waterborne filters removal; Wherein, described interference light is reflect from aerial the scattered beam entering the light in water and produced by sea water molecular scattering through sea.
The virtual periscope of the present embodiment, light filtration members 4 is added between camera lens 1 and photo-sensitive cell 2, for will through camera lens 1, but do not reflect that the interference light of object shape information waterborne filters and remove, this part interference light refers to that refraction enters the scattered beam that the light in water produced by sea water molecular scattering through sea from aerial; Because this part scattered beam is light virtual periscope contrast being produced to infringement, after thus adopting above-mentioned smooth filtration members 4 to be filtered removal, can reduce or eliminate above-mentioned infringement, improve image contrast, and then improve the image quality of virtual periscope.
Described smooth filtration members 4 is polaroid, and be arranged on the focal plane of described camera lens 1, described polaroid has center, and described polaroid at least has a part, and on it, the polarization direction of any point is parallel with the line direction at described center with this point; Further, the centre normal 6 through described center of described polaroid overlaps with the optical axis 7 of described camera lens 1.
Theoretical according to Rayleigh scattering, the scattered light formed after molecular scattering belongs to partial poolarized light, and this part scattered light to have perpendicular to incident ray and scattered beam form the first direction of vibration of plane, and be parallel to the second direction of vibration of this plane, and the first direction of vibration is preponderated.
By camera lens 1 just to incident ray, the optical axis 7 of centre normal 6, camera lens 1 and incident ray are overlapped, a then part for above-mentioned polaroid, its polarization direction is vertical with above-mentioned first direction of vibration, thus this partial dispersion light can be stoped to pass, and then stop its imaging on photo-sensitive cell 2, thus improve image quality.
According to radiation transfer theory in ocean, the light entered in water is reflected through sea from aerial, when the degree of depth is greater than certain numerical value (as 40m), the light vertically propagated downwards occupies advantage, thus when by camera lens 1 horizontal positioned, when making the light propagated straight down pass perpendicularly through camera lens 1, can at utmost filter interference light, improve image quality.
Polaroid is arranged on the focal plane of camera lens 1, the directional light with same nature can be gathered in the same point on polaroid, and then concentration filter removes stray light, improves image quality further.
The part of above-mentioned polaroid can be designed to arbitrary shape according to actual needs, as annular, triangle, square, fan-shaped, irregular shape etc.
Specifically in the present embodiment, as shown in Figure 3 and Figure 4, described polaroid is combined to form by several the fan-shaped sub-polaroids 5 being summit with described center, and the polarization direction of described fan-shaped sub-polaroid 5 is parallel with the angular bisector direction of its central angle.
Polarization direction due to polaroid is in the same direction mostly, when manufacturing above-mentioned polaroid, people only need to intercept fan-shaped sub-polaroid 5 from polarization direction polaroid in the same direction, then splicing can obtain the above-mentioned polaroid of the present embodiment, thus the polaroid in the present embodiment can when making the polarization direction of polaroid vertical with the polarization direction of interference light as far as possible, reduce manufacture difficulty, reduce manufacturing cost.Preferred, arrange polaroid to be combined to form by least 4 (as 5,6,7,8,9,10,11,12,24,36,64,128 etc.) fan-shaped sub-polaroids 5, and the central angle angle of any two fan-shaped sub-polaroids 5 is identical, polaroid each several part can be made all to have filter above-mentioned interference light can, to reach the object improving virtual periscope image contrast.
In the present embodiment, as shown in Figure 4, described polaroid is circular, but those skilled in the art can be as required, be set to required triangle, square, polygon, ellipse or irregular shape in actual applications, be all acceptables, can goal of the invention be realized.
As a kind of improvement opportunity scheme to the present embodiment, also comprise the rotational structure for driving described polaroid to rotate around described centre normal.The angular velocity that described rotational structure drives described polaroid to rotate is 50 revolutions per seconds.Those skilled in the art according to actual conditions, can be arranged rotational structure and drives the angular velocity of polaroid rotation to be 40 revolutions per seconds, 60 revolutions per seconds, 70 revolutions per seconds etc., be only greater than 40 revolutions per seconds and all can realize goal of the invention.As for the concrete form of rotational structure, can adopt multiple implementation of the prior art, the present embodiment is not described in detail.
When polaroid is combined to form by multiple sub-polaroid, between two adjacent sub-polaroids, there is seam, when using virtual periscope to observe object waterborne, start rotational structure, it is made to drive polaroid to rotate, and pilot angle speed is greater than 40 revolutions per seconds, the impact that the light tight printing opacity caused of seaming position is uneven can be eliminated, be conducive to improving image quality.
Embodiment 2
The present embodiment provides a kind of virtual periscope, and it is the improvement on embodiment 1 basis, and difference is: shown in figure 4, and described smooth filtration members 4 is polaroid, and on it, the polarization direction of any point is parallel with the line direction at described center with this point.Such polaroid can at utmost filter removes interference light, for raising image contrast, improves the image quality better effects if of virtual periscope.
Embodiment 3
The present embodiment provides a kind of production method of the virtual periscope as described in embodiment 1 or 2, is included in the step arranging described smooth filtration members 4 between described camera lens 1 and described photo-sensitive cell 2.Described filtration members 4 is the polaroid in embodiment 1 or 2.Adopt production method of the present invention to make the virtual periscope obtained, interference light can be eliminated, there is the advantage improving image contrast.
Embodiment 4
The present embodiment provides the application of a kind of virtual periscope as described in embodiment 1 or 2 under water on carrying platform.Wherein carrying platform comprises and is not limited to submarine, UUV, AUV, ROV, diving apparatus etc. under water.
Obviously, above-described embodiment is only for clearly example being described, and the restriction not to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all embodiments.And thus the apparent change of extending out or variation be still among the protection domain of the invention.
Claims (10)
1. a virtual periscope, comprising:
Camera lens (1), is suitable for being arranged under water, for receiving the light from object waterborne, and is imaged on photo-sensitive cell (2) by described object waterborne;
Photo-sensitive cell (2), for image signal is converted into electric signal, and inputs to display element (3);
Display element (3), for becoming image to export described transform electrical signals;
It is characterized in that: also comprise light filtration members (4), be arranged between described camera lens (1) and described photo-sensitive cell (2), for will through described camera lens (1), but do not reflect described object shape information waterborne interference light filter remove;
Described interference light is reflect from aerial the scattered beam entering the light in water and produced by sea water molecular scattering through sea.
2. virtual periscope according to claim 1, it is characterized in that: described smooth filtration members is polaroid, be arranged on the focal plane of described camera lens (1), described polaroid has center, and described polaroid at least has a part, on it, the polarization direction of any point is parallel with the line direction at described center with this point; Further, the centre normal (6) at described center of passing of described polaroid overlaps with the optical axis (7) of described camera lens (1).
3. virtual periscope according to claim 2, is characterized in that: described polaroid whole, and on it, the polarization direction of any point is parallel with the line direction at described center with this point.
4. virtual periscope according to claim 2, it is characterized in that: described polaroid is combined to form by several the fan-shaped sub-polaroids (5) being summit with described center, and the polarization direction of described fan-shaped sub-polaroid (5) is parallel with the angular bisector direction of its central angle.
5. virtual periscope according to claim 4, is characterized in that: described polaroid is combined to form by least 4 described fan-shaped sub-polaroids (5), and the central angle angle of any two described fan-shaped sub-polaroids (5) is identical.
6. virtual periscope according to claim 4, is characterized in that: also comprise the rotational structure for driving described polaroid to rotate around described centre normal.
7. virtual periscope according to claim 4, is characterized in that: the angular velocity that described rotational structure drives described polaroid to rotate is greater than 40 revolutions per seconds.
8. a production method for the virtual periscope according to any one of claim 1-7, is characterized in that: be included in the step arranging described smooth filtration members (4) between described camera lens (1) and described photo-sensitive cell (2).
9. the virtual periscope according to any one of the claim 1-7 application under water on carrying platform.
10. application according to claim 9, described carrying platform under water comprises: submarine, UUV, AUV, ROV, diving apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610124300.XA CN105572856B (en) | 2016-03-04 | 2016-03-04 | A kind of virtual periscope and production method thereof and application |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610124300.XA CN105572856B (en) | 2016-03-04 | 2016-03-04 | A kind of virtual periscope and production method thereof and application |
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| CN105572856A true CN105572856A (en) | 2016-05-11 |
| CN105572856B CN105572856B (en) | 2016-11-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109905585A (en) * | 2019-04-02 | 2019-06-18 | 浙江大学 | A kind of rotary-type underwater polarization camera |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822738A (en) * | 2010-03-22 | 2012-12-12 | 伊斯曼柯达公司 | Digital camera with underwater capture mode |
| CN103868851A (en) * | 2014-02-24 | 2014-06-18 | 北京空间机电研究所 | Notch filter-based multispectral camera imaging system |
| CN203799101U (en) * | 2014-04-15 | 2014-08-27 | 中山联合光电科技有限公司 | Thin type imaging optical system |
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2016
- 2016-03-04 CN CN201610124300.XA patent/CN105572856B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822738A (en) * | 2010-03-22 | 2012-12-12 | 伊斯曼柯达公司 | Digital camera with underwater capture mode |
| CN103868851A (en) * | 2014-02-24 | 2014-06-18 | 北京空间机电研究所 | Notch filter-based multispectral camera imaging system |
| CN203799101U (en) * | 2014-04-15 | 2014-08-27 | 中山联合光电科技有限公司 | Thin type imaging optical system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109905585A (en) * | 2019-04-02 | 2019-06-18 | 浙江大学 | A kind of rotary-type underwater polarization camera |
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