CN108801607B - Method and device for detecting coaxiality of optical axes of double-fish-eye lens module - Google Patents
Method and device for detecting coaxiality of optical axes of double-fish-eye lens module Download PDFInfo
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- CN108801607B CN108801607B CN201811004941.7A CN201811004941A CN108801607B CN 108801607 B CN108801607 B CN 108801607B CN 201811004941 A CN201811004941 A CN 201811004941A CN 108801607 B CN108801607 B CN 108801607B
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- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/02—Testing optical properties
- G01M11/0221—Testing optical properties by determining the optical axis or position of lenses
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Abstract
The application discloses a method and a device for detecting coaxiality of optical axes of a double-fish spectacle head module, wherein the method comprises the following steps: firstly, symmetrically assembling two same fisheye lenses in opposite directions to form a back-to-back type double-fisheye lens module; then placing the assembled double-fisheye lens module between two concentric ring test charts for testing; and finally, judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring images acquired by the double-fisheye lens module. This application uses concentric ring test chart to inspect the axiality of the optical axis of two fisheye lens modules of back-to-back formula, and is simple quick, efficient, and the accuracy is also high.
Description
Technical Field
The invention relates to the technical field of camera shooting, in particular to a method and a device for detecting coaxiality of optical axes of a double-fish spectacle head module.
Background
At present, most panoramic cameras in the market adopt a design scheme of back-to-back double fisheye lenses, the scheme is that two completely identical fisheye lenses are symmetrically assembled on a fixed support in opposite directions, and when a picture is taken, the pictures taken by the two fisheye lenses are spliced through a background processing chip, so that a 360-degree panoramic picture without dead angles is finally presented.
Because the panoramic photo is formed by splicing the images of the two lenses, if the optical axes of the two fisheye lenses have an included angle or are not on the same straight line, the images obtained by the two lenses have the problems of picture dislocation and the like at the spliced edge during splicing, and the image quality of the panoramic photo is influenced. Therefore, the imaging quality of the panoramic camera is greatly related to the assembling precision of the double-fish glasses head.
Therefore, how to assemble the two fisheye lenses on the bracket on the premise that the optical axes are completely coaxial becomes the key for success or failure of the product.
Disclosure of Invention
In view of the above, the present invention provides a method and a device for detecting the coaxiality of optical axes of a pair of fisheye lens modules, which are simple and fast, and have high efficiency and high accuracy. The specific scheme is as follows:
a method for detecting coaxiality of optical axes of a pair of fish glasses lens module comprises the following steps:
symmetrically assembling two same fisheye lenses in opposite directions to form a back-to-back type double fisheye lens module;
placing the assembled double-fisheye lens module between two concentric ring test charts for testing;
and judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring pictures acquired by the double-fisheye lens module.
Preferably, in the method for detecting the coaxiality of the optical axes of the double-fisheye lens module, provided by the embodiment of the invention, the two concentric ring test charts are attached to a barrel cover of a barrel-shaped light source test barrel;
the double-fisheye lens module is arranged in the center of the cylindrical light source testing barrel; and the two fisheye lenses are respectively aligned to the central positions of the concentric ring test patterns.
Preferably, in the method for detecting the coaxiality of the optical axes of the dual-fisheye lens module provided by the embodiment of the invention, the inner wall of the cylindrical light source testing barrel emits light, and a horizontal stripe pattern is attached to the barrel wall.
Preferably, in the method for detecting the coaxiality of the optical axes of the dual-fisheye lens module provided by the embodiment of the present invention, whether the optical axes of the dual-fisheye lens module are on a straight line is determined according to the concentric ring images acquired by the dual-fisheye lens module, which specifically includes:
starting one fisheye lens, and adjusting the center of the obtained concentric ring image to be completely overlapped with the circle center in the concentric ring test chart;
starting another fisheye lens, and if the arc of the outermost concentric circle in the obtained concentric circle images completely appears, judging that the optical axes of the two fisheye lens modules are on the same straight line; and if the arc of the outermost concentric circle in the acquired picture is missing, judging that the optical axes of the double-fisheye lens module are not on the same straight line.
The embodiment of the invention also provides a device for detecting the coaxiality of the optical axes of the double-fish-eye lens module, which comprises the following components:
the assembling module is used for symmetrically assembling two same fisheye lenses into a back-to-back double fisheye lens module in opposite directions;
the testing module is used for placing the assembled double-fisheye lens module between two concentric ring test charts for testing;
and the judging module is used for judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring pictures acquired by the double-fisheye lens module.
Preferably, in the device for detecting the coaxiality of the optical axes of the dual-fisheye lens module provided by the embodiment of the invention, the test module comprises a cylindrical light source test barrel and two concentric ring test charts; the two concentric ring test charts are attached to the barrel cover of a barrel-shaped light source test barrel;
the double-fisheye lens module is arranged in the center of the cylindrical light source testing barrel; and the two fisheye lenses are respectively aligned to the central positions of the concentric ring test patterns.
Preferably, in the apparatus for detecting coaxiality of optical axes of a dual-fisheye lens module provided by the embodiment of the invention, the inner wall of the cylindrical light source testing barrel emits light, and a horizontal stripe pattern is attached to the barrel wall.
Preferably, in the apparatus for detecting the coaxiality of optical axes of the dual fisheye lens module provided in the embodiment of the present invention, the determining module is specifically configured to start one fisheye lens, and adjust the center of the obtained concentric ring image to be completely coincident with the center of a circle in the concentric ring test chart; starting another fisheye lens, and if the arc of the outermost concentric circle in the obtained concentric circle images completely appears, judging that the optical axes of the two fisheye lens modules are on the same straight line; and if the arc of the outermost concentric circle in the acquired picture is missing, judging that the optical axes of the double-fisheye lens module are not on the same straight line.
The invention provides a method and a device for detecting coaxiality of optical axes of a double-fish spectacle lens module, wherein the method comprises the following steps: firstly, symmetrically assembling two same fisheye lenses in opposite directions to form a back-to-back type double-fisheye lens module; then placing the assembled double-fisheye lens module between two concentric ring test charts for testing; and finally, judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring images acquired by the double-fisheye lens module. The invention uses the concentric ring test chart to check the coaxiality of the optical axes of the back-to-back type double-fisheye lens module, and has the advantages of simplicity, rapidness, high efficiency and high accuracy.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flowchart of a method for detecting coaxiality of optical axes of a pair of fish glasses head module according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a cylindrical light source testing barrel and two concentric ring testing charts provided in an embodiment of the present invention;
fig. 3 is a concentric circle picture in which the circular arcs of the outermost concentric circles completely appear according to the embodiment of the present invention;
fig. 4 is a diagram of a concentric circle with missing circular arcs of the outermost concentric circle according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a method for detecting coaxiality of optical axes of a double-fish spectacle lens module, which comprises the following steps as shown in figure 1:
s101, symmetrically assembling two same fisheye lenses in opposite directions to form a back-to-back double-fisheye lens module;
s102, placing the assembled double-fisheye lens module between two concentric ring test charts for testing;
s103, judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring pictures acquired by the double-fisheye lens module.
In the method for detecting the coaxiality of the optical axes of the double-fisheye lens module, provided by the embodiment of the invention, the coaxiality of the optical axes of the back-to-back double-fisheye lens module is detected by using the special pattern of the concentric ring test chart through the steps, so that the method is simple and rapid, high in efficiency and high in accuracy.
Further, in specific implementation, in the method for detecting the coaxiality of the optical axes of the dual-fisheye lens module provided by the embodiment of the invention, as shown in fig. 2, the two concentric ring test charts 1 may be attached to a barrel cover of a barrel-shaped light source test barrel 2; specifically, in order to ensure the accuracy of the detection result, the double-fisheye lens module may be disposed at a central position in the cylindrical light source testing barrel 2; the two fisheye lenses can be respectively aligned to the central positions of the concentric ring test chart 1.
Furthermore, in a specific implementation, in the method for detecting the coaxiality of the optical axes of the dual-fisheye lens module provided by the embodiment of the invention, the inner wall of the cylindrical light source testing barrel can emit light to provide a light source for the fisheye lens; in order to enable the double-fish-eye lens module to be accurately arranged at the center position in the cylindrical light source testing barrel, a transverse stripe pattern can be attached to the barrel wall of the cylindrical light source testing barrel, so that the accuracy of a detection result is further improved.
Specifically, in a specific implementation, in the method for detecting the coaxiality of the optical axes of the dual fisheye lens module provided by the embodiment of the invention, the step S103 determines whether the optical axes of the dual fisheye lens module are on a straight line according to the concentric ring images acquired by the dual fisheye lens module, and specifically may include the following steps:
step one, starting one fisheye lens, and adjusting the center of the obtained concentric ring image to be completely overlapped with the circle center in the concentric ring test chart;
step two, starting another fisheye lens, and if the arc of the outermost concentric circle in the acquired concentric circle images completely appears (as shown in fig. 3), judging that the optical axes of the two fisheye lens modules are on the same straight line; if the arc of the outermost concentric circle in the acquired picture is missing (as shown in fig. 4), it is determined that the optical axes of the two fisheye lens modules are not on the same straight line.
Based on the same inventive concept, the embodiment of the invention also provides a device for detecting the coaxiality of the optical axes of the double-fish-eye lens module, and the principle of solving the problems of the device is similar to that of the method for detecting the coaxiality of the optical axes of the double-fish-eye lens module, so that the implementation of the device can refer to the implementation of the method for detecting the coaxiality of the optical axes of the double-fish-eye lens module, and repeated parts are not repeated.
In specific implementation, the apparatus for detecting the coaxiality of optical axes of the pair of fish glasses lens module provided by the embodiment of the present invention specifically includes:
the assembling module is used for symmetrically assembling two same fisheye lenses into a back-to-back double fisheye lens module in opposite directions;
the testing module is used for placing the assembled double-fisheye lens module between two concentric ring test charts for testing;
and the judging module is used for judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring pictures acquired by the double-fisheye lens module.
In the device for detecting the coaxiality of the optical axes of the double-fisheye lens module provided by the embodiment of the invention, whether the optical axes of the double-fisheye lens module are on the same straight line or not can be accurately and quickly detected through the interaction of the three modules.
Further, in a specific implementation, in the apparatus for detecting the coaxiality of the optical axes of the dual-fisheye lens module provided by the embodiment of the invention, as shown in fig. 2, the test module includes a cylindrical light source test barrel 2 and two concentric ring test charts 1; the two concentric ring test charts 1 are attached to the barrel cover of a barrel-shaped light source test barrel 2; specifically, in order to ensure the accuracy of the detection result, the double-fisheye lens module may be disposed at a central position in the cylindrical light source testing barrel; the two fisheye lenses can be respectively aligned to the central positions of the concentric ring test patterns.
Furthermore, in a specific implementation, in the apparatus for detecting the coaxiality of the optical axes of the dual fisheye lens module provided by the embodiment of the invention, the inner wall of the cylindrical light source testing barrel can emit light to provide a light source for the fisheye lens; in order to enable the double-fish-eye lens module to be accurately arranged at the center position in the cylindrical light source testing barrel, a transverse stripe pattern can be attached to the barrel wall of the cylindrical light source testing barrel, so that the accuracy of a detection result is further improved.
Specifically, in the specific implementation, in the apparatus for detecting the coaxiality of the optical axes of the dual fisheye lens module provided in the embodiment of the present invention, the determining module may be specifically configured to start one fisheye lens, and adjust the center of the obtained concentric ring image to be completely coincident with the center of a circle in the concentric ring test chart; starting another fisheye lens, and if the arc of the outermost concentric circle in the obtained concentric circle images completely appears, judging that the optical axes of the two fisheye lens modules are on the same straight line; and if the arc of the outermost concentric circle in the acquired picture is missing, judging that the optical axes of the double-fisheye lens module are not on the same straight line.
For more specific working processes of the modules, reference may be made to corresponding contents disclosed in the foregoing embodiments, and details are not repeated here.
To sum up, the embodiment of the present invention provides a method and a device for detecting the coaxiality of optical axes of a pair of fish glasses head module, the method includes: firstly, symmetrically assembling two same fisheye lenses in opposite directions to form a back-to-back type double-fisheye lens module; then placing the assembled double-fisheye lens module between two concentric ring test charts for testing; and finally, judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring images acquired by the double-fisheye lens module. The invention uses the concentric ring test chart to check the coaxiality of the optical axes of the back-to-back type double-fisheye lens module, and has the advantages of simplicity, rapidness, high efficiency and high accuracy.
Finally, it is further noted that, herein, relational terms are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The method and the device for detecting the coaxiality of the optical axes of the double-fish-eye lens module provided by the invention are described in detail, a specific example is applied in the text to explain the principle and the implementation mode of the invention, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. A method for detecting coaxiality of optical axes of a pair of fish glasses lens module is characterized by comprising the following steps:
symmetrically assembling two same fisheye lenses in opposite directions to form a back-to-back type double fisheye lens module;
placing the assembled double-fisheye lens module between two concentric ring test charts for testing; the two concentric ring test charts are attached to the barrel cover of a barrel-shaped light source test barrel; the double-fisheye lens module is arranged in the center of the cylindrical light source testing barrel; the two fisheye lenses are respectively aligned to the central positions of the concentric ring test patterns;
and judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring pictures acquired by the double-fisheye lens module.
2. The method for detecting the coaxiality of the optical axes of the double-fish-lens modules according to claim 1, wherein the inner wall of the cylindrical light source testing barrel emits light, and a transverse stripe pattern is attached to the barrel wall.
3. The method for detecting the coaxiality of the optical axes of the dual-fish-eye lens modules according to claim 2, wherein judging whether the optical axes of the dual-fish-eye lens modules are on a straight line according to the concentric ring images acquired by the dual-fish-eye lens modules specifically comprises:
starting one fisheye lens, and adjusting the center of the obtained concentric ring image to be completely overlapped with the circle center in the concentric ring test chart;
starting another fisheye lens, and if the arc of the outermost concentric circle in the obtained concentric circle images completely appears, judging that the optical axes of the two fisheye lens modules are on the same straight line; and if the arc of the outermost concentric circle in the acquired picture is missing, judging that the optical axes of the double-fisheye lens module are not on the same straight line.
4. The utility model provides a detection apparatus for two fish glasses head module optical axis axiality which characterized in that includes:
the assembling module is used for symmetrically assembling two same fisheye lenses into a back-to-back double fisheye lens module in opposite directions;
the testing module is used for placing the assembled double-fisheye lens module between two concentric ring test charts for testing; the test module comprises a cylindrical light source test barrel and two concentric ring test charts; the two concentric ring test charts are attached to the barrel cover of a barrel-shaped light source test barrel; the double-fisheye lens module is arranged in the center of the cylindrical light source testing barrel; the two fisheye lenses are respectively aligned to the central positions of the concentric ring test patterns;
and the judging module is used for judging whether the optical axes of the double-fisheye lens module are on the same straight line or not according to the concentric ring pictures acquired by the double-fisheye lens module.
5. The device for detecting the coaxiality of the optical axes of the double-fish-lens modules as claimed in claim 4, wherein the inner wall of the cylindrical light source testing barrel emits light, and a transverse stripe pattern is attached to the barrel wall.
6. The device for detecting the coaxiality of the optical axes of the double-fish-eye lens module according to claim 5, wherein the judgment module is specifically configured to start one of the fish-eye lenses, and adjust the center of the obtained concentric ring image to be completely coincident with the center of a circle in the concentric ring test chart; starting another fisheye lens, and if the arc of the outermost concentric circle in the obtained concentric circle images completely appears, judging that the optical axes of the two fisheye lens modules are on the same straight line; and if the arc of the outermost concentric circle in the acquired picture is missing, judging that the optical axes of the double-fisheye lens module are not on the same straight line.
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| CN106706269A (en) * | 2016-12-13 | 2017-05-24 | 歌尔科技有限公司 | Method and device for detecting double fisheye lenses |
| CN107563987A (en) * | 2016-07-01 | 2018-01-09 | 北京疯景科技有限公司 | Demarcate the method and device of imaging difference |
| CN108171759A (en) * | 2018-01-26 | 2018-06-15 | 上海小蚁科技有限公司 | The scaling method of double fish eye lens panorama cameras and device, storage medium, terminal |
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| CN103954434A (en) * | 2014-04-16 | 2014-07-30 | 青岛歌尔声学科技有限公司 | Optical axis calibration gauge, system and method |
| CN106612390A (en) * | 2015-10-23 | 2017-05-03 | 宁波舜宇光电信息有限公司 | Camera module with two imaging modules and optical axis parallelism adjustment method |
| CN107563987A (en) * | 2016-07-01 | 2018-01-09 | 北京疯景科技有限公司 | Demarcate the method and device of imaging difference |
| CN106706269A (en) * | 2016-12-13 | 2017-05-24 | 歌尔科技有限公司 | Method and device for detecting double fisheye lenses |
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