CN111238449A - Total reflection type underwater camera suitable for deep sea environment - Google Patents
Total reflection type underwater camera suitable for deep sea environment Download PDFInfo
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- CN111238449A CN111238449A CN202010047373.XA CN202010047373A CN111238449A CN 111238449 A CN111238449 A CN 111238449A CN 202010047373 A CN202010047373 A CN 202010047373A CN 111238449 A CN111238449 A CN 111238449A
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- reflector
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C11/00—Photogrammetry or videogrammetry, e.g. stereogrammetry; Photographic surveying
- G01C11/02—Picture taking arrangements specially adapted for photogrammetry or photographic surveying, e.g. controlling overlapping of pictures
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C13/00—Surveying specially adapted to open water, e.g. sea, lake, river or canal
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- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
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Abstract
The invention provides a total reflection type underwater camera suitable for a deep sea environment. The camera comprises window glass, a detector shell, a detector and a reflective optical system; one end of the detector shell is provided with a light through hole, the other end of the detector shell is closed, and window glass and a detector are sequentially arranged in the detector shell along the incident direction of light; the reflective optical system is positioned in front of the light through hole and is fixedly arranged on the detector shell; the reflective optical system is provided with a light inlet and at least one reflector, and the relative positions of the light inlet and the at least one reflector must ensure that light beams passing through the light inlet can pass through the light through hole and the window glass in sequence after being reflected by the at least one reflector and are finally received by the detector; the camera avoids the influence of high-intensity pressure difference on the reflective optical system caused by an air-water interface, and can be used in a deep sea environment.
Description
Technical Field
The invention relates to the technical field of underwater imaging, in particular to a total reflection type underwater camera suitable for a deep sea environment.
Background
Deep sea optical imaging detection is a technology combining light, mechanical, electrical and arithmetic for the purpose of obtaining deep sea image information. The deep sea camera system is an important hardware component of a deep sea optical imaging detection system, and directly influences the shooting quality of images.
The conventional underwater camera adopts a refraction type optical system form, window glass is positioned at the foremost end of the system and directly faces huge pressure difference between deep sea seawater and an air interface, so that the size of the window glass is greatly limited, the light-passing aperture of the conventional underwater camera is severely limited, and the resolution of the camera is low. The design of an underwater super-wide-angle optical system for imaging a marine and aerial target [ J ]. an optical and photoelectric technology [ 2013,11(3):82-85 and the document [ 2 ]. Yuanying, anzhi brave, Xiaozhuan and Bu jin river [ J ]. university of vingchun science and technology [ 2013,36(3):38-41 ] all propose that a spherical glass window is adopted to replace a flat glass window, so that the size of the window glass can be increased to a certain extent, but the problem that the aperture of an underwater camera is limited due to the fact that the window glass is still at the forefront end of the system cannot be solved.
At present, the clear aperture of a deep sea camera is generally less than 200 mm. Therefore, it is urgently needed to design a large-aperture optical camera for use in deep sea environment, to meet the requirements of deep sea high-resolution imaging and high-sensitivity detection, and to provide important supports for deep sea mineral development, deep sea resource exploration, deep sea biological and chemical activity exploration and the like.
Disclosure of Invention
The invention provides a total reflection type underwater camera suitable for a deep sea environment, and aims to solve the problems that a traditional underwater camera adopts a refraction type structure, window glass is positioned at the front end of an optical system of the camera, an air and water interface exists in the system, high-intensity pressure is generated at the interface, the caliber of the camera is limited, and the camera cannot be used in the deep sea environment due to the high-intensity pressure.
The basic design idea of the invention is as follows:
the optical system based on the invention adopts a light reflection mode and is integrally arranged in water, so that no interface of air and water exists, high-strength underwater pressure can be borne, the window glass is positioned at the front end of the detector, and the caliber of the camera can be larger, so that the requirement of high resolution of the camera on the caliber can be met, and the underwater camera can realize high-resolution detection in a deep sea environment.
The technical solution of the invention is as follows:
a total reflection formula underwater camera suitable for deep sea environment which characterized in that:
the detector comprises window glass, a detector shell, a detector and a reflective optical system;
one end of the detector shell is provided with a light through hole, the other end of the detector shell is closed, and window glass and a detector are sequentially arranged in the detector shell along the incident direction of light;
the reflective optical system is positioned in front of the light through hole and is fixedly arranged on the detector shell; the reflective optical system is provided with a light inlet and at least one reflector, and the relative positions of the light inlet and the at least one reflector must ensure that light beams passing through the light inlet can pass through the light through hole and the window glass in sequence after being reflected by the at least one reflector and are finally received by the detector; the reflecting surface of the reflector is a curved surface.
Further, the reflective optical system includes a support frame, a first mirror, a second mirror, and a third mirror;
the supporting frame is fixedly arranged on one side of the detector shell, which is provided with the light through hole;
the light inlet is formed on the supporting frame; the first reflector, the second reflector and the third reflector are all arranged on the supporting frame; light beams enter from the light inlet, are reflected by the first reflector, the second reflector and the third reflector in sequence, then pass through the light through hole and the window glass and are received by the detector; and the reflecting surface of the third reflector is a curved surface.
Further, the reflecting surfaces of the first reflecting mirror and the second reflecting mirror are spherical surfaces, quadric surfaces, aspheric surfaces, free-form surfaces or planes.
Furthermore, the detector shell comprises a front end cover, a sealing cylinder and a rear end cover; the front end cover is connected with one end of the sealing cylinder through a sealing screw, and the rear end cover is connected with the sealing cylinder through a sealing screw; the window glass and the detector are both arranged in the sealing cylinder; the light through hole is arranged on the front end cover.
Furthermore, the joints of the front end cover and the sealing cylinder body and the joints of the rear end cover and the sealing cylinder body are provided with O-shaped sealing rings for sealing.
Further, the aperture of the light entrance of the reflection optical system is 200mm or more.
Furthermore, the reflecting mirror of the reflecting optical system is made of metal material, glass material, crystal or composite material.
Compared with the prior art, the invention has the following technical effects:
1. the invention adopts a reflection type optical system, the light inlet is arranged on the reflection type optical system, the reflecting surface of the reflecting mirror of the reflection type optical system is a curved surface, and the light beams can be totally focused and reflected to enter the detector.
2. The reflection type optical system is provided with a plurality of reflectors, so that the optical structure and the mechanical structure of the whole reflection type optical system are more reasonable and compact.
3. The invention adopts a reflection type optical system, and can ensure that the aperture of the window glass is unchanged as much as possible, so that the size structure of the whole detector side is not changed.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
The reference numbers are as follows:
01-reflective optical system, 02-detector housing;
1-light inlet, 2-first reflector, 3-second reflector, 4-third reflector, 5-reflector support frame, 6-front end cover, 7-window glass, 8-sealing cylinder, 9-rear end cover, 10-detector, 11-O-shaped sealing ring and 12-light through hole.
The specific implementation mode is as follows:
the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The embodiment provides a specific structure of a total reflection type underwater camera suitable for a deep sea environment, which comprises a detector shell 02, a detector 10 and a reflection type optical system 01;
the reflective optical system 01 in the present embodiment includes a first mirror 2, a second mirror 3, a third mirror 4, and a support frame 5; the light inlet 1 is arranged on a support frame 5 (on the lower frame of the support frame 5 in the figure), and the first reflector 2, the second reflector 3 and the third reflector 4 are all arranged on the support frame 5; the first reflector 2 is arranged on the path of the light beam entering through the light inlet 1 (on the upper frame of the support frame 5 in the figure), and the second reflector 3 is arranged on the path of the light beam reflected by the first reflector 2 (on the lower right frame of the support frame 5 in the figure); the third reflector 4 is arranged on the beam path after reflection by the second reflector 3 (on the left frame of the support frame 5 in the figure); the reflecting surface of the reflecting mirror of the third reflecting mirror 4 must be a curved surface (a spherical surface, a quadratic surface or a free-form surface can be selected according to the situation). The reflecting surfaces of the first reflector 2 and the second reflector 3 may be selected from spherical surfaces, quadratic surfaces, free curved surfaces, and flat surfaces, as the case may be.
The detector shell 02 comprises a front end cover 6, a sealing cylinder 8 and a rear end cover 9; the front end cover 6 is connected with one end of the sealing cylinder 8 through a sealing screw, and the rear end cover 9 is connected with the sealing cylinder 8 through a sealing screw; the window glass 7 and the detector 10 are sequentially arranged in the sealing cylinder 8 according to the transmission direction of the light beam; the front end cover 6 is provided with a light through hole 12.
The supporting frame 5 is connected to the front end cover 6 through screws, so that the light beams focused and reflected by the third reflector 4 can be received by the detector 10 after passing through the light through hole 12 and the window glass 7.
In addition, in order to improve the sealing performance, O-shaped sealing rings 11 are arranged at the joint of the front end cover 6 and the sealing cylinder 8, the joint of the rear end cover 9 and the sealing cylinder 9 and the joint of the window glass 7 and the sealing cylinder 8 for sealing.
In this embodiment, the aperture of the light inlet 1 may be greater than or equal to 200mm, and certainly may be smaller than 200 mm. In this embodiment, the first reflector 2, the second reflector 3, and the third reflector 4 may be made of metal, glass, crystal, or composite material.
The specific implementation principle of the camera is as follows:
the light beam enters the reflective optical system from the light inlet 1, then enters the first reflector 2, is reflected to the second reflector 3 through the first reflector 2, is reflected to the third reflector 4 through the second reflector 3, then enters the window glass 7 after being focused and reflected by the third reflector 4, finally is received by the detector 10 after being transmitted by the window glass 7, in the whole process, because the light inlet 1 is arranged at one side of the reflective optical system 01, the reflective optical system 01 is wholly positioned in water, no interface of air and water exists, huge pressure brought by deep sea environment can be borne, the window glass 7 is directly arranged in the detector shell 02, in order to increase the caliber of the camera, the caliber of the light inlet 1 can be increased, because the reflecting surface of the third reflector 4 is a curved surface and has focusing and reflecting capacity, the caliber of the window glass 7 can not be increased or properly increased, in order to bear the influence of underwater pressure difference, the window glass 7 only needs to be increased in thickness. Therefore, the camera disclosed by the invention can realize large-caliber high-resolution detection in a deep sea environment.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A total reflection formula underwater camera suitable for deep sea environment which characterized in that:
the detector comprises window glass, a detector shell, a detector and a reflective optical system;
one end of the detector shell is provided with a light through hole, the other end of the detector shell is closed, and window glass and a detector are sequentially arranged in the detector shell along the incident direction of light;
the reflective optical system is positioned in front of the light through hole and is fixedly arranged on the detector shell; the reflective optical system is provided with a light inlet and at least one reflector, and the relative positions of the light inlet and the at least one reflector must ensure that light beams passing through the light inlet can pass through the light through hole and the window glass in sequence after being reflected by the at least one reflector and are finally received by the detector; the reflecting surface of the reflector is a curved surface.
2. The fully reflective underwater camera for deep sea environment according to claim 1, wherein: the reflective optical system comprises a supporting frame, a first reflecting mirror, a second reflecting mirror and a third reflecting mirror;
the supporting frame is fixedly arranged on one side of the detector shell, which is provided with the light through hole;
the light inlet is formed on the supporting frame; the first reflector, the second reflector and the third reflector are all arranged on the supporting frame; light beams enter from the light inlet, are reflected by the first reflector, the second reflector and the third reflector in sequence, then pass through the light through hole and the window glass and are received by the detector; and the reflecting surface of the third reflector is a curved surface.
3. The fully reflective underwater camera for deep sea environment according to claim 2, wherein: the reflecting surfaces of the first reflecting mirror and the second reflecting mirror are spherical surfaces, quadric surfaces, free-form surfaces or planes.
4. The fully reflective underwater camera for deep sea environment according to claim 3, wherein: the detector shell comprises a front end cover, a sealing cylinder and a rear end cover; the front end cover is connected with one end of the sealing cylinder through a sealing screw, and the rear end cover is connected with the sealing cylinder through a sealing screw; the window glass and the detector are both arranged in the sealing cylinder; the light through hole is arranged on the front end cover.
5. The underwater camera of claim 4, wherein said camera is adapted to be used in deep sea environment: the joints of the front end cover and the sealing cylinder body and the joints of the rear end cover and the sealing cylinder body are provided with O-shaped sealing rings for sealing.
6. The total reflection underwater camera suitable for use in deep sea environment according to any one of claims 1 to 5 wherein: the aperture of the light inlet of the reflective optical system is more than or equal to 200 mm.
7. The total reflection underwater camera suitable for use in deep sea environment according to any one of claims 1 to 5 wherein: the reflecting mirror of the reflecting optical system is made of metal material, glass material, crystal or composite material.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010047373.XA CN111238449A (en) | 2020-01-16 | 2020-01-16 | Total reflection type underwater camera suitable for deep sea environment |
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| CN202010047373.XA CN111238449A (en) | 2020-01-16 | 2020-01-16 | Total reflection type underwater camera suitable for deep sea environment |
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| CN202010047373.XA Pending CN111238449A (en) | 2020-01-16 | 2020-01-16 | Total reflection type underwater camera suitable for deep sea environment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751948A (en) * | 2020-06-30 | 2020-10-09 | 青岛科技大学 | Pressure self-balancing type optical lens packaging structure of deep sea instrument |
| CN113556449A (en) * | 2021-06-23 | 2021-10-26 | 中国科学院西安光学精密机械研究所 | Total reflection type underwater camera suitable for deep well environment |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751948A (en) * | 2020-06-30 | 2020-10-09 | 青岛科技大学 | Pressure self-balancing type optical lens packaging structure of deep sea instrument |
| CN111751948B (en) * | 2020-06-30 | 2022-04-08 | 青岛科技大学 | Pressure self-balancing type optical lens packaging structure of deep sea instrument |
| CN113556449A (en) * | 2021-06-23 | 2021-10-26 | 中国科学院西安光学精密机械研究所 | Total reflection type underwater camera suitable for deep well environment |
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Application publication date: 20200605 |