CN114353830B - Optical path switching device and switching method for constant star calibration - Google Patents
Optical path switching device and switching method for constant star calibration Download PDFInfo
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- 230000003287 optical effect Effects 0.000 title claims abstract description 201
- 238000000034 method Methods 0.000 title abstract description 8
- 238000003384 imaging method Methods 0.000 claims abstract description 12
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000001514 detection method Methods 0.000 claims description 3
- 238000004891 communication Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 0.000 description 1
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Abstract
The application relates to the technical field of optical path calibration, in particular to an optical path switching device and a switching method for constant star calibration. The light path switching device comprises an optical structure, an optical primary mirror, an optical secondary mirror, an optical filter, a lens group, a detector and an optical filter switching module; combining the external light beams to an optical secondary lens through an optical primary lens, reflecting the combined external light beams to a filter for filtering, filtering the reflected light beams by the filter, and transmitting the filtered light beams to a lens group; focusing the light beam onto a detector by the lens group to form an image, and finishing beacon cursor calibration; when the star cursor is calibrated, the optical filter switching module drives the optical filter to swing and deviate from the light beam main path, the optical main mirror combines external light beams to the optical secondary mirror, and the optical secondary mirror reflects the combined external light beams to the lens group; the lens group focuses the light beam to the detector for imaging, and the correction of the star light is completed; the two share one set of equipment, so that the cost is reduced, and the back and forth switching of the beacon optical correction and the star optical correction is satisfied.
Description
Technical Field
The application relates to the technical field of optical path calibration, in particular to an optical path switching device and a switching method for constant star calibration.
Background
At present, a space-based network represented by a low-orbit constellation is in a large-scale construction stage, and inter-satellite laser communication has the characteristics of high speed, small volume, high interference resistance, high confidentiality and the like, and has become the first choice means of space-based network networking. After the inter-satellite laser communication load enters the orbit along with the rocket, the installation standard of the inter-satellite laser communication load is offset due to the influence of the change of force environment and thermal environment, and the offset leads to the extremely large searching uncertain area and the reduction of the capturing probability when the communication link is established for the first time between the laser communication loads. Before the first link establishment of the laser communication load, calibration is needed to correct the offset generated by the installation reference, the existing laser communication load can only be calibrated by adopting the beacon light, and the beacon light path can not be switched to the star calibration light path to perform star light calibration.
Disclosure of Invention
First, the technical problem to be solved
The application aims to provide an optical path switching device and a switching method for constant star calibration, which solve the technical problem of switching a beacon light path to a star calibration optical path.
(II) technical scheme
The application provides an optical path switching device for a constant star calibration, which comprises an optical structure, an optical antenna, an optical filter, a lens group, a detector and an optical filter switching module, wherein the optical antenna is arranged on the optical structure; the optical antenna, the optical filter, the lens group and the detector are sequentially arranged on the optical structure; the filtering switching module is connected with the optical filter and used for driving the optical filter to deviate from the main beam path or return to the main beam path;
the optical antenna is used for combining the external light beams and reflecting the external light beams to the optical filter or radiating the external light beams to the lens group;
the lens group is used for focusing the light beam filtered by the optical filter to the detector for imaging, or directly focusing the external light beam reflected by the optical antenna to the detector for imaging.
Further, the optical antenna comprises an optical main mirror and an optical sub mirror, the optical main mirror and the optical sub mirror are arranged at intervals, the external light beam is combined to the optical sub mirror through the optical main mirror, and the optical sub mirror reflects the external light beam to the optical filter or the lens group.
Further, the optical primary mirror is a concave mirror, and the optical secondary mirror is disposed right above the concave portion of the optical primary mirror.
Further, the magnification of the optical antenna is 5-20 times.
Further, the filter bandwidth of the filter is 10-50nm.
Further, the focal length of the lens group is 10-100mm.
Further, the number of pixels of the detector is 1280 multiplied by 1024, the pixel size is 4.8 mu m, and the band detection range is 600 nm-1000 nm.
Further, the detector is a visible light detector.
Further, the optical filter switching module is a micro-swing motor, and the output end of the micro-swing motor is connected with the optical filter to drive the optical filter to swing back and forth.
The application also provides a light path switching method for the constant star calibration, which comprises the light path switching device for the constant star calibration, and comprises a beacon optical calibration and a star optical calibration:
the optical primary mirror combines the external light beams to the optical secondary mirror, the optical secondary mirror reflects the combined external light beams to the optical filter for filtering, the optical filter filters the reflected light beams, and the filtered light beams are transmitted to the lens group; focusing the light beam onto a detector by the lens group to form an image, and finishing beacon cursor calibration;
the optical filter switching module drives the optical filter to swing to deviate from the light beam main path, the optical main mirror combines the external light beam to the optical secondary mirror, and the optical secondary mirror reflects the combined external light beam to the lens group; the lens group focuses the light beam to the detector for imaging, and the star calibration is completed.
(III) beneficial effects
Compared with the prior art, the application has the following advantages:
the optical path switching device for the Hemsl calibration provided by the application combines external light beams to the optical secondary lens through the optical primary lens, the optical secondary lens reflects the combined external light beams to the optical filter for filtering, the optical filter filters the reflected light beams, and the filtered light beams are transmitted to the lens group; focusing the light beam onto a detector by the lens group to form an image, and finishing beacon cursor calibration; when the star cursor is calibrated, the optical filter switching module drives the optical filter to swing and deviate from the light beam main path, the optical main mirror combines external light beams to the optical secondary mirror, and the optical secondary mirror reflects the combined external light beams to the lens group; the lens group focuses the light beam to the detector for imaging, and the correction of the star light is completed; the two share one set of equipment, so that the cost is reduced, and the back and forth switching of the beacon optical correction and the star optical correction is satisfied.
Drawings
Fig. 1 is a schematic structural diagram of an optical path switching device for a constant star calibration according to an embodiment of the present application.
The device comprises a first optical antenna, a second optical antenna, a light filter, a third lens group, a fourth lens group, a detector, a fourth lens group, a fifth optical structure and a fourth optical filter switching module, wherein the first optical antenna, the second optical antenna, the third optical filter, the fourth lens group, the detector, the fourth optical structure and the fourth optical filter switching module are arranged in sequence.
Detailed Description
The advantages and features of the present application will become more fully apparent from the following description and appended claims, taken in conjunction with the accompanying drawings, in which specific embodiments of the application are shown and described. It should be noted that the drawings are in a very simplified form and are adapted to non-precise proportions, merely for the purpose of facilitating and clearly aiding in the description of embodiments of the application.
It should be noted that, in order to clearly illustrate the present application, various embodiments of the present application are specifically illustrated by the present embodiments to further illustrate different implementations of the present application, where the various embodiments are listed and not exhaustive. Furthermore, for simplicity of explanation, what has been mentioned in the previous embodiment is often omitted in the latter embodiment, and therefore, what has not been mentioned in the latter embodiment can be referred to the previous embodiment accordingly.
FIG. 1 is a schematic diagram of an optical path switching device for a Hemsl calibration according to an embodiment of the present application, where the optical path switching device includes an optical structure, an optical antenna, an optical filter, a lens group, a detector, and an optical filter switching module; the optical antenna, the optical filter, the lens group and the detector are sequentially arranged on the optical structure; the filtering switching module is connected with the optical filter and used for driving the optical filter to deviate from the main beam path or return to the main beam path; the optical antenna is used for combining the external light beams and reflecting the external light beams to the optical filter or radiating the external light beams to the lens group; the lens group is used for focusing the light beam filtered by the optical filter to the detector for imaging, or directly focusing the external light beam reflected by the optical antenna to the detector for imaging.
As some alternative embodiments, the optical antenna includes an optical primary mirror and an optical secondary mirror, where the optical primary mirror is spaced apart from the optical secondary mirror, and the external beam is combined to the optical secondary mirror by the optical primary mirror, and the optical secondary mirror reflects the external beam to the optical filter or the lens group. Preferably, the optical primary mirror is a concave mirror, and the optical secondary mirror is disposed directly above the concave portion of the optical primary mirror.
Specifically, the magnification of the optical antenna is 5 to 20 times, preferably 10 times. The optical antenna material is microcrystalline glass, and the aperture of the optical antenna is 80mm. The filter bandwidth of the filter is 10-50nm, preferably 20nm. The focal length of the lens group is 10-100mm, preferably 50mm. The number of pixels of the detector is 1280 multiplied by 1024, the pixel size is 4.8 mu m, and the band detection range is 600 nm-1000 nm. The detector is a visible light detector, preferably a CCD detector, and specifically adopts a NOIV2SN1300A-QDC visible light detector. The optical structure 5 is made of aluminum-based silicon carbide, and is an optical fixing structural member, and the optical structure is a mounting plate for mounting an optical antenna, an optical filter, a lens group, a detector and an optical filter switching module. The optical filter switching module is a micro-swing motor, and the output end of the micro-swing motor is connected with the optical filter to drive the optical filter to swing back and forth.
The application also provides a light path switching method for the constant star calibration, which comprises the light path switching device for the constant star calibration, and comprises a beacon optical calibration and a star optical calibration:
the optical primary mirror combines the external light beams to the optical secondary mirror, the optical secondary mirror reflects the combined external light beams to the optical filter for filtering, the optical filter filters the reflected light beams, and the filtered light beams are transmitted to the lens group; focusing the light beam onto a detector by the lens group to form an image, and finishing beacon cursor calibration;
the optical filter switching module drives the optical filter to swing to deviate from the light beam main path, the optical main mirror combines the external light beam to the optical secondary mirror, and the optical secondary mirror reflects the combined external light beam to the lens group; the lens group focuses the light beam to the detector for imaging, and the correction of the star light is completed;
when beacon light calibration is needed, the optical filter switching module drives the optical filter to swing to return to the light beam main path, the secondary mirror reflects the external light beams of the combined beams to the optical filter for filtering, the optical filter filters the reflected light beams, and the filtered light beams are transmitted to the lens group; focusing the light beam onto a detector by the lens group to form an image, and finishing beacon cursor calibration again; and so on, the back and forth switching of the beacon cursor correction and the star cursor correction is realized.
The optical path switching device for the Hemsl calibration provided by the application combines external light beams to the optical secondary lens through the optical primary lens, the optical secondary lens reflects the combined external light beams to the optical filter for filtering, the optical filter filters the reflected light beams, and the filtered light beams are transmitted to the lens group; focusing the light beam onto a detector by the lens group to form an image, and finishing beacon cursor calibration; when the star cursor is calibrated, the optical filter switching module drives the optical filter to swing and deviate from the light beam main path, the optical main mirror combines external light beams to the optical secondary mirror, and the optical secondary mirror reflects the combined external light beams to the lens group; the lens group focuses the light beam to the detector for imaging, and the correction of the star light is completed; the two share one set of equipment, so that the cost is reduced, and the back and forth switching of the beacon optical correction and the star optical correction is satisfied.
The beneficial effects of the microwave switching method based on the field enhancement system provided by the application correspond to the beneficial effects of the optical path switching device for the constant star calibration, and the repeated description is omitted.
While the application is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the drawings and are herein described in detail. It should be understood that the application is not to be limited to the particular embodiments disclosed, but on the contrary, the application is to cover all modifications, equivalents, and alternatives falling within the spirit or scope of the application as defined by the appended claims. The same component numbers may be used throughout the drawings to refer to the same or like parts.
The present application is not described in detail as being well known to those skilled in the art.
Claims (8)
1. The optical path switching device for the Hemsl calibration is characterized by comprising an optical structure, an optical antenna, an optical filter, a lens group, a detector and an optical filter switching module; the optical antenna, the optical filter, the lens group and the detector are sequentially arranged on the optical structure; the filtering switching module is connected with the optical filter and used for driving the optical filter to deviate from the main beam path or return to the main beam path;
the optical antenna is used for combining the external light beams and reflecting the external light beams to the optical filter or radiating the external light beams to the lens group;
the lens group is used for focusing the light beam filtered by the optical filter to the detector for imaging, or directly focusing the external light beam reflected by the optical antenna to the detector for imaging;
the optical antenna comprises an optical main mirror and an optical secondary mirror, the optical main mirror and the optical secondary mirror are arranged at intervals, the optical main mirror combines external light beams to the optical secondary mirror, the optical secondary mirror reflects the combined external light beams to the optical filter for filtering, the optical filter filters the reflected light beams, and the filtered light beams are transmitted to the lens group; focusing the light beam onto a detector by the lens group to form an image, and finishing beacon cursor calibration;
the optical filter switching module drives the optical filter to swing to deviate from the light beam main path, the optical main mirror combines the external light beam to the optical secondary mirror, and the optical secondary mirror reflects the combined external light beam to the lens group; the lens group focuses the light beam to the detector for imaging, and the star calibration is completed.
2. The optical path switching apparatus for permanent star calibration according to claim 1, wherein the optical main mirror is a concave mirror, and the optical sub-mirror is disposed directly above the concave portion of the optical main mirror.
3. The optical path switching apparatus for use in a permanent star calibration according to any one of claims 1 to 2, wherein the optical antenna has a magnification of 5 to 20 times.
4. The optical path switching apparatus for use in a permanent star calibration according to any one of claims 1 to 2, wherein the filter has a filter bandwidth of 10 to 50nm.
5. The optical path switching apparatus for use in a permanent star correction according to any one of claims 1 to 2, wherein the focal length of the lens group is 10 to 100mm.
6. The optical path switching device for permanent star calibration according to any one of claims 1 to 2, wherein the number of pixels of the detector is 1280×1024, the pixel size is 4.8 μm, and the band detection range is 600nm to 1000nm.
7. The optical path switching apparatus for use in a permanent star calibration according to any one of claims 1-2, wherein the detector is a visible light detector.
8. The optical path switching device for a permanent star calibration according to any one of claims 1 to 2, wherein the optical filter switching module is a micro-swing motor, and an output end of the micro-swing motor is connected with the optical filter to drive the optical filter to swing back and forth.
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| CN202111619264.1A CN114353830B (en) | 2021-12-27 | 2021-12-27 | Optical path switching device and switching method for constant star calibration |
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| CN202111619264.1A CN114353830B (en) | 2021-12-27 | 2021-12-27 | Optical path switching device and switching method for constant star calibration |
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| CN114353830B true CN114353830B (en) | 2023-11-14 |
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