CN214173705U - Reference optical fiber unit of optical fiber spectrum telescope - Google Patents
Reference optical fiber unit of optical fiber spectrum telescope Download PDFInfo
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- CN214173705U CN214173705U CN202120109662.8U CN202120109662U CN214173705U CN 214173705 U CN214173705 U CN 214173705U CN 202120109662 U CN202120109662 U CN 202120109662U CN 214173705 U CN214173705 U CN 214173705U
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Abstract
The utility model discloses a reference fiber unit of optical fiber spectrum telescope, including first reference unit structure, second reference unit structure, light source subassembly, third reference unit structure, power supply module, reference optic fibre, the both ends of second reference unit structure respectively with first reference unit structure the third reference unit structure is connected, through the light source subassembly to reference optic fibre and provide incident light source, through power supply module does the light source subassembly provides the power, reference optic fibre with first reference unit structure is connected. The utility model discloses can overcome current camera calibration time and use the unsafe defect of work optic fibre theoretical position to a single reference fiber unit can install several optic fibre, has saved a large amount of spaces under the condition of guaranteeing the calibration precision, is worth being used widely.
Description
Technical Field
The utility model relates to an astronomical telescope high accuracy photogrammetry technical field, concretely relates to reference optical fiber unit of optical fiber spectrum telescope.
Background
The optical fiber spectrum telescope is one kind of optical telescope, aims at the optical fiber to be examined the star during operation, and its degree of accuracy requires highly, and the error requirement generally is within 40 microns, generally uses the measurement system of making a video recording to shoot and measure and makes the robot unit of control optical fiber carry out feedback motion and finally pinpoints the optical fiber. Generally, a positioning camera covers hundreds of optical fiber robots, each optical fiber robot controls one optical fiber to perform moving positioning, and therefore the identification accuracy of the camera is very important. Generally, a camera has a large view field, a traditional calibration target is difficult to process and manufacture, the object distance of a working site is long, the influence of environmental factors such as air disturbance on the precision is large, and the requirement of subsequent long-time positioning cannot be met only by calibrating the camera once. The calibration method used at present is to light part of the working optical fiber, the corresponding optical fiber robot is in a zero position, a positioning camera is used for shooting the working optical fiber, and the pixel coordinate position in the picture is identified by using an optical gravity center method to match, fit and calibrate with the processing theoretical coordinate of the hole position on the optical fiber focal plane.
However, the above method has certain disadvantages: when the working optical fiber is used for fitting and matching, because the theoretical coordinate is used as the hole site coordinate of the focal plane unit and the optical fiber extends out of the focal plane for a certain distance, the distance error between the center of the optical fiber light spot and the hole site coordinate thereof is unknown; because the relative position between the reference units needs to be known when the working optical fiber is used for calibration, the positions of the units cannot be accurately positioned by taking the zero position of the existing optical fiber robot as a reference, and therefore, the reference optical fiber unit of the optical fiber spectrum telescope is provided.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve lies in: how to overcome the defect that the theoretical position of a working optical fiber used in the calibration of the existing camera is inaccurate, and provides a reference optical fiber unit of an optical fiber spectrum telescope.
The utility model discloses a solve above-mentioned technical problem through following technical scheme, the utility model discloses a first reference unit structure, second reference unit structure, light source subassembly, third reference unit structure, power supply module, reference optical fiber, the both ends of second reference unit structure respectively with first reference unit structure the third reference unit structure is connected, through the light source subassembly to reference optical fiber and providing incident light source, through power supply module does the light source subassembly provides the power, reference optical fiber with first reference unit structure is connected.
Preferably, the light source assembly is an LED lamp, the power supply assembly is a power supply module, the LED lamp is disposed inside the second reference unit structural member, and the power supply module is disposed inside the third reference unit structural member.
Preferably, the light source incident end of the reference optical fiber is arranged inside the second reference unit structural member, and the light source emergent end of the reference optical fiber is arranged at the end of the first reference unit structural member.
Preferably, the number of the reference optical fibers is multiple, and the multiple reference optical fibers are arranged outside the first reference unit structural member in a circular arrangement.
Preferably, the reference optical fiber unit further includes a light-equalizing component, and the light-equalizing component is disposed between the light source incident end of the reference optical fiber and the LED lamp.
Preferably, the light-homogenizing assembly is an optical filter, the optical filter is connected with the second reference unit structural member, and the optical filter has an atomization structure with light diffusion characteristics.
Preferably, the reference optical fiber unit further includes a rubber wire ring for orderly arranging and tightening the reference optical fibers, and the rubber wire ring is sleeved on the first reference unit structural member.
Preferably, a groove is formed in the end of the first reference unit structural member, and a target ball of the laser tracker is connected with the first reference unit structural member through the groove.
Preferably, the third reference unit structural part is connected with the focal plane in an interference fit mode.
Preferably, two ends of the second reference unit structural member are respectively in threaded connection with the first reference unit structural member and the third reference unit structural member.
Compared with the prior art, the utility model has the following advantages: the defect that the theoretical position of the working optical fiber used in calibration of the existing camera is inaccurate can be overcome, and a plurality of optical fibers can be installed in a single reference optical fiber unit, so that a large amount of space is saved under the condition of ensuring calibration precision, and the calibration method is worthy of popularization and application.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a reference optical fiber unit system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a reference optical fiber unit in an embodiment of the present invention;
fig. 3 is a schematic axial sectional view of a reference optical fiber unit according to an embodiment of the present invention;
fig. 4 is a front view of a reference optical fiber unit without a target ball according to an embodiment of the present invention.
In the figure: 1. a first reference cell unit; 2. a second reference cell component; 3. a third reference cell component; 4. a fourth reference cell unit; 5. a fifth reference cell unit; 6. a target ball; 7. a reference optical fiber; 8. a rubber wire loop; 9. a magnet; 10. an optical fiber fixing member; 11. an optical filter; 12. an LED lamp; 13. a lithium battery; 14. a scorched surface; 15. a laser tracker; 16. a reference fiber unit.
Detailed Description
The embodiments of the present invention will be described in detail below, and the present embodiment is implemented on the premise of the technical solution of the present invention, and a detailed implementation manner and a specific operation process are given, but the scope of the present invention is not limited to the following embodiments.
Referring to fig. 1, fig. 1 is a schematic view of the whole reference fiber system, a plurality of reference fiber units 16 are uniformly distributed and fixed on a focal plane 14, and a laser tracker 15 is fixed in place. Then the target ball 6 of the laser tracker is arranged at the front end structure of one reference optical fiber unit 16 and the position of the target ball is detected and recorded by using the laser tracker 15, then the target ball 6 is moved to the next reference optical fiber unit 16 to be also detected and recorded, the steps are repeated until the positions of all the reference optical fiber units 16 are detected, and the detected positions are used as the theoretical positions of all the reference optical fiber units 16.
As shown in fig. 2, fig. 2 is a schematic structural diagram of the reference optical fiber unit, and the mechanical structure of the reference optical fiber unit 16 is composed of five components 1, 2, 3, 4, and 5 in the figure, and the five components are connected by threads. The whole body is divided into three parts, namely a front part, a middle part and a rear part. The front part of the reference optical fiber unit is mainly composed of a first reference unit component 1, a target ball 6 of a laser tracker 15 can be arranged on the front part of the reference optical fiber unit, so that the laser tracker 15 can be used for accurate identification and positioning, a light spot formed by lightening reference optical fibers 7 which are arranged in a ring shape on the front part of the reference optical fiber unit can be identified and positioned by an optical fiber positioning camera, and for the sake of clarity, only one reference optical fiber 7 is arranged on the reference optical fiber unit 16 in fig. 2. The rubber conductor ring 8 plays a role in preventing the reference optical fiber 7 from being wound on the working optical fiber unit so that the reference optical fiber 7 is orderly arranged and tightened; the middle part mainly comprises a second reference unit component 2 and a third reference unit component 3, and an LED lamp 12 is arranged in the middle part to illuminate the light source incidence end of the reference optical fiber 7; the rear part mainly comprises a fourth reference unit component 4 and a fifth reference unit component 5, and a power supply module is installed in the rear part to supply power to the LED lamp 12. The whole may be mounted on the focal plane 14 by interference fit.
As shown in fig. 3, fig. 3 is a cross-sectional view of a single reference optical fiber unit, which is provided with a groove structure at the front part, and a magnet 9 is arranged in the groove structure, and can be used for installing and adsorbing a target ball 6 of a laser tracker 15. The LED lamp 12 is arranged in the middle of the LED lamp and serves as a light source, the light equalizing assembly is arranged in the middle of the LED lamp, light of the LED lamp 12 can enter a light source incidence end of the reference optical fiber 7 through the layer of optical filter 11, the optical filter 11 can play a role in equalizing light, an atomization structure with light diffusion characteristics is arranged on the optical filter 11, light is mixed and scattered to be uniform when passing through the optical filter 11, light spots of the emergent end of the optical fiber light source at the front end of the light source are made to be more uniform, and the accuracy of a camera for recognizing the position of the optical fiber through a light center method can be improved. The optical fiber fixing member 10 mounts the light source incident end of the reference optical fiber 7 therein, wherein the optical fiber fixing member 10 is mounted on the rear portion of the first reference unit member 1 by screw coupling. The power supply structure is designed in the rear part of the reference optical fiber unit 16, the lithium battery 13 can be installed in the power supply structure to supply power to the LED lamp 12, and the maximum outer diameter size of the fourth reference unit component 4 and the fifth reference unit component 5 in the rear part are installed in interference fit with the focal plane hole.
As shown in fig. 4, fig. 4 is a front view of a reference optical fiber unit without target ball, and 12 reference optical fibers 7 arranged in a ring shape are distributed on the front side as reference optical fibers. When the camera is calibrated, the LED lamp 12 in the reference optical fiber unit 16 is turned on to enable the front end annular distribution reference optical fiber 7 to be lightened. And then shooting the picture by using an optical fiber positioning camera in a dark environment, and identifying the optical fiber in the picture by using an optical gravity center method so as to obtain the pixel coordinate of the optical fiber. The theoretical coordinates of the fiber are measured by the laser tracker. After obtaining the fiber pixels and the theoretical coordinates, the camera can be calibrated by using a polynomial fitting method.
The working principle is as follows: when the device works, a proper amount of reference optical fiber units 16 are uniformly distributed and installed on a focal plane plate (focal plane 14) provided with working optical fibers, the front end structure of each reference optical fiber unit 16 is designed with the position of a target ball 6 capable of installing a laser tracker 15, the target ball 6 is installed at the front end of the reference optical fiber unit 16, the laser tracker 15 is fixed at the proper position to detect the position of the target ball 6, and the position coordinates of the reference optical fiber unit 16 can be obtained through coordinate conversion. The target ball 6 is then moved to the next reference fibre unit 16 and the laser tracker 15 is used repeatedly to detect and record, repeating the above steps until the positions of all reference fibre units 16 have been detected and recorded. The recorded position is the theoretical coordinate position of the reference fibre unit 16 detected during subsequent camera calibration.
In conclusion, the reference optical fiber unit of the optical fiber spectrum telescope can overcome the defect that the theoretical position of the working optical fiber used for calibrating the existing camera is inaccurate, and a plurality of optical fibers can be installed in a single reference optical fiber unit, so that a large amount of space is saved under the condition of ensuring the calibration precision, and the reference optical fiber unit is worth being popularized and used.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention.
Claims (10)
1. A reference fiber unit for a fiber optic spectral telescope, comprising: the optical fiber laser device comprises a first reference unit structural part, a second reference unit structural part, a light source assembly, a third reference unit structural part, a power supply assembly and a reference optical fiber, wherein two ends of the second reference unit structural part are respectively connected with the first reference unit structural part and the third reference unit structural part, the light source assembly provides an incident light source for the reference optical fiber, the power supply assembly provides a power supply for the light source assembly, and the reference optical fiber is connected with the first reference unit structural part.
2. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 1, wherein: the light source assembly is an LED lamp, the power supply assembly is a power supply module, the LED lamp is arranged inside the second reference unit structural member, and the power supply module is arranged inside the third reference unit structural member.
3. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 2, wherein: the light source incident end of the reference optical fiber is arranged in the second reference unit structural member, and the light source emergent end of the reference optical fiber is arranged at the end part of the first reference unit structural member.
4. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 3, wherein: the reference optical fibers are arranged outside the first reference unit structural member in a ring-shaped arrangement mode.
5. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 2, wherein: the reference optical fiber unit further comprises a light-homogenizing assembly, and the light-homogenizing assembly is arranged between the light source incidence end of the reference optical fiber and the LED lamp.
6. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 5, wherein: the light homogenizing assembly is an optical filter, the optical filter is connected with the second reference unit structural part, and the optical filter is of an atomization structure with light diffusion characteristics.
7. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 1, wherein: the reference optical fiber unit further comprises a rubber wire ring used for orderly arranging and tightening the reference optical fibers, and the rubber wire ring is sleeved on the first reference unit structural member.
8. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 1, wherein: the end part of the first reference unit structural part is provided with a groove, and a target ball of the laser tracker is connected with the first reference unit structural part through the groove.
9. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 1, wherein: the third reference unit structural part is connected with the focal plane.
10. The reference fiber unit of the fiber-optic spectroscopic telescope of claim 1, wherein: and two ends of the second reference unit structural member are respectively in threaded connection with the first reference unit structural member and the third reference unit structural member.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120109662.8U CN214173705U (en) | 2021-01-15 | 2021-01-15 | Reference optical fiber unit of optical fiber spectrum telescope |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120109662.8U CN214173705U (en) | 2021-01-15 | 2021-01-15 | Reference optical fiber unit of optical fiber spectrum telescope |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115316959A (en) * | 2022-10-13 | 2022-11-11 | 浙江大学医学中心(余杭) | Three-color multi-channel optical fiber brain information recording system |
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2021
- 2021-01-15 CN CN202120109662.8U patent/CN214173705U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115316959A (en) * | 2022-10-13 | 2022-11-11 | 浙江大学医学中心(余杭) | Three-color multi-channel optical fiber brain information recording system |
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