CN115112150A - Calibration method for indicating prism of focal plane - Google Patents
Calibration method for indicating prism of focal plane Download PDFInfo
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- CN115112150A CN115112150A CN202210747676.1A CN202210747676A CN115112150A CN 115112150 A CN115112150 A CN 115112150A CN 202210747676 A CN202210747676 A CN 202210747676A CN 115112150 A CN115112150 A CN 115112150A
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- ccd
- focal plane
- prism
- coordinate system
- indicating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C25/00—Manufacturing, calibrating, cleaning, or repairing instruments or devices referred to in the other groups of this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/02—Measuring arrangements characterised by the use of mechanical techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
- G01C1/02—Theodolites
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
- G01C1/02—Theodolites
- G01C1/04—Theodolites combined with cameras
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C15/00—Surveying instruments or accessories not provided for in groups G01C1/00 - G01C13/00
Abstract
The invention discloses a method for calibrating an indicating prism of a focal plane, belonging to the technical field of space remote sensing assembly, and the method comprises the following steps: s1: mounting a focal plane substrate; s2: adjusting the focal plane substrate coordinate system; s3: mounting an indicating prism on the focal plane substrate by using a screw; s4: adjusting the coordinate system of the indicating prism by grinding; s5: mounting a CCD assembly; s6: adjusting a CCD assembly coordinate system, and adjusting the CCD assembly coordinate system to be consistent with the CCD splicing instrument coordinate system by operating the CCD splicing instrument, so that the indicating prism is consistent with the CCD assembly coordinate system, and the prism calibration can be finally realized.
Description
Technical Field
The invention relates to the technical field of space remote sensing assembly, in particular to a method for calibrating an indicating prism of a focal plane.
Background
The indicating prism is generally a cubic prism and is bonded on the mechanical seat, the indicating prism is exposed outside the structural body during design, measurement is convenient, and a body coordinate system of the indicating component is convenient for measurement of a single machine;
the cube prism is an auxiliary tool frequently used in the field of satellite assembly, generally adopts quartz crystal, is plated with a reflecting film on the surface, is high in manufacturing precision, is generally adhered to a mechanical part and then is installed on a fixed main part through screw connection, and is used as a reference standard of the main part to assist measurement. The perpendicularity of two adjacent surfaces of the indicating prism is generally 2 ', the reference prism is generally placed on the surface of the component, the perpendicularity of two adjacent surfaces of the extracted component is generally better than 1' for the pitching parameters, and the component coordinate system is extracted by adopting a contact surface attaching mode;
at present, in the process of aerospace remote sensing assembly, for a focal plane component, since the coordinate system of the focal plane component needs to be used for indicating the focal plane coordinate system for multiple times in subsequent testing work, how to indicate each direction of the focal plane through an indicating prism and provide an accurate direction for the use of the subsequent focal plane becomes an important problem to be solved urgently by technical personnel in the field.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a method for calibrating an indicating prism of a focal plane.
In order to achieve the above purpose, the invention provides the following technical scheme:
the invention discloses a calibration method of an indicating prism of a focal plane, which comprises the following steps:
s1: mounting a focal plane substrate;
mounting a tool on a CCD splicing instrument platform, and connecting the focal plane substrate to the CCD splicing instrument platform through the tool;
s2: adjusting the focal plane substrate coordinate system;
fixing a dial indicator on the CCD splicing instrument, operating the CCD splicing instrument, and driving the dial indicator through the CCD splicing instrument to respectively adjust the upper surface and the side surface of the focal plane substrate to be consistent with the direction of a coordinate system of the CCD splicing instrument;
s3: mounting an indicator prism to the focal plane substrate with screws;
s4: adjusting the coordinate system of the indicating prism by grinding;
placing the indicating prism on the upper surface of the focal plane substrate, respectively collimating two mirror surfaces of a + Y surface and a + X surface of the indicating prism by using two optical theodolites, reading pitch angle readings of the two theodolites, pitching and repairing the + X surface and the + Y surface of the indicating prism to be consistent with a reference prism, attaching an optical flat rule to the side surface of the focal plane substrate, and adjusting the deviation of the indicating prism in the + X direction to be consistent with the optical flat rule;
s5: mounting a CCD assembly;
s6: and adjusting a CCD assembly coordinate system, and adjusting the CCD assembly coordinate system to be consistent with the CCD splicing instrument coordinate system by operating the CCD splicing instrument, so that the indicating prism is consistent with the CCD assembly coordinate system, and the prism calibration can be finally realized.
Furthermore, the CCD assembly comprises a CCD and a CCD mechanical seat, the CCD is arranged on the upper surface of the CCD mechanical seat, and the CCD mechanical seat is arranged on the upper surface of the focal plane substrate.
In the technical scheme, the method for calibrating the indication prism of the focal plane, provided by the invention, has the beneficial effects that:
according to the method for calibrating the indicating prism of the focal plane, the CCD splicing instrument is used as a medium, the focal plane substrate and the indicating prism coordinate system are adjusted to be consistent, the maximum calibration error of the focal plane and the prism can be 5.2' according to the final calibration result of the focal plane prism, accurate directions are provided for the use of subsequent focal planes, and the prism has a good effect in the subsequent use.
Drawings
In order to more clearly illustrate the embodiments of the present application or technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
FIG. 1 is a schematic view of the CCD splicing instrument assembly site disclosed by the invention;
FIG. 2 is an enlarged view of a portion of FIG. 1;
FIG. 3 is a schematic view of a tool mount optical flat rule disclosed in the present invention;
FIG. 4 is a schematic illustration of a disclosed theodolite calibration.
Description of reference numerals:
a CCD splicing instrument 1; a tool 2; a high power microscope 3; a focal plane substrate 4; a CCD mechanical seat 5; a CCD 6; an indication prism 7; a display imaging system 8; a reference prism 9; an optical flat 10.
Detailed Description
In order to make the technical solutions of the present invention better understood, those skilled in the art will now describe the present invention in further detail with reference to the accompanying drawings.
As shown in FIGS. 1-4;
the invention discloses a method for calibrating an indicating prism of a focal plane, which comprises the following steps:
s1: mounting the focal plane substrate 4;
firstly, designing a specially-made auxiliary assembly tool 2, which comprises two supports and a bearing plate, wherein the bearing plate is connected between the two supports, and a focal plane substrate 4 is borne by the bearing plate, during assembly, the tool 2 is firstly installed on a platform of a CCD splicing instrument 1, and then the focal plane substrate 4 is assembled, so that the focal plane substrate 4 is connected to the platform of the CCD splicing instrument 1 through the tool 2;
s2: adjusting a coordinate system of the focal plane substrate 4, fixing a dial indicator on the CCD splicing instrument 1, operating the CCD splicing instrument 1, and respectively adjusting the upper surface and the side surface of the focal plane substrate 4 to be consistent with the coordinate system direction of the CCD splicing instrument 1 by driving the dial indicator through the CCD splicing instrument 1;
s3: the index prism 7 is mounted to the focal plane substrate 4 with screws;
s4: adjusting the coordinate system of the indicating prism 7 by grinding;
placing an indicating prism 7 on the ground end face of the focal plane substrate 4, as shown in fig. 4, using two optical theodolites to respectively collimate two mirror faces of a + Y plane and a + X plane of the indicating prism 7, reading pitch angle readings of the two theodolites, pitching the + X plane and the + Y plane of the indicating prism 7 until the surfaces are consistent with a reference prism 9, attaching an optical flat ruler 10 to the side face of the focal plane substrate 4, and adjusting the deflection of the indicating prism 7 in the + X direction to be consistent with the optical flat ruler 10;
s5: mounting a CCD assembly, wherein the CCD assembly comprises a CCD6 and a CCD mechanical seat 5; specifically, the CCD6 is mounted on the upper surface of the CCD mechanical seat 5, and the CCD mechanical seat 5 is mounted on the upper surface of the focal plane substrate 4;
s6: adjusting a CCD assembly coordinate system;
the CCD assembly coordinate system is adjusted to be consistent with the CCD splicing instrument 1 coordinate system by operating the CCD splicing instrument 1, so that the indicating prism 7 is consistent with the CCD assembly coordinate system, and the prism calibration can be finally realized.
Specifically, the CCD splicer 1 is a work platform made of marble, manufactured by beijing chenyang automation ltd, product model PJY-003, and the two-dimensional work table and the lift table are guided by ball linear guides, and the feed transmission is performed by ball screws and long working distance microscopes for alignment and detection. Wherein, within the measuring range of 0-200mm, the guide precision of the linear guide rail of the CCD splicing instrument 1 is 0 ', and the orthogonality is 0'; more than 200mm, the guide precision of the linear guide rail is 2 ', the orthogonality is 2', the feeding resolution is 1 micrometer, the CCD splicing instrument 1 mainly has two functions, one function is to adjust the coordinate system of the CCD splicing instrument body to be consistent with the focal plane substrate 4 through a dial indicator, the other function is to adjust the focal plane coordinate system on the focal plane substrate 4 to be consistent with the CCD splicing instrument 1, the focal depth of the long working distance microscope of the Z axis is better than 0.002mm, the installation precision of the focal plane on the focal plane substrate 4 and the CCD splicing instrument 1 in all directions within the range of 200mm can be adjusted to be within 0.002mm through the dial indicator, and the CCD splicing instrument 1 is used as a medium for converting the coordinate systems.
The mechanical dial indicator with the measurement precision of 0.002mm is fixed on the CCD splicing instrument 1 and used for adjusting the position of the focal plane substrate 4 and ensuring that the coordinate systems of the focal plane substrate 4 and the CCD splicing instrument 1 are consistent.
Generally, an optical flat ruler 10 or a common optical plane mirror is adopted to lead out a focal plane substrate end face coordinate system, the focal plane substrate end face coordinate system is placed on the upper surface of a tool 2 during work, a plane is used for being attached to a machining end face of a focal plane substrate, the mechanical end face direction is guided to the optical flat ruler 10, and the function is consistent with that of a reference prism 9 through the deflection direction of the optical plane leading-out face.
The focal plane substrate 4 is mainly used as a main bearing structure for bearing a focal plane, and has high requirements on form and position tolerance due to strict requirements on precision, and the planeness of the connecting end face is superior to 0.002 mm.
In the technical scheme, the method transfers the direction of the coordinate system of the focal plane to the reference prism through the CCD splicing instrument 1 and the theodolite, meets the measurement and installation requirements of the focal plane reference prism, can realize the measurement and installation requirements of different focal plane reference prisms, is used for multiple times in the calibration of the focal plane prism of the high-resolution XX star of Jilin I, has the maximum calibration error of 5.2', has better use effect in subsequent test work, and is practical and effective;
taking the focal plane of a satellite of Jilin I model as an example, calibrating the indicating prism 7 according to the steps, and obtaining the following calibration data of the indicating prism through repeated measurement:
+ Y-direction side error: e (+ Y') ═ Arctan (0.002/180) ═ 2.29 ″
-error in X direction: e (-X) ═ Arctan (0.002/150) ═ 2.75 ″
+ Y-direction error: e (+ Y) ═ Arctan (0.002/150) ═ 2.75 ″
The angle errors of the focal plane substrate 4 obtained as described above are:
+ Y-direction pitch angle:
El＇＝[E(-X) 2 +E(+Y) 2 ] 0 . 5 ＝[Arctan 2 (0.002/150)+Arctan 2
(0.002/150)] 0 . 5 ＝3.89″；
-X-direction pitch angle:
Er＇＝E[E(+Y) 2 +E(-X) 2 ] 0 . 5 ＝[Arctan 2 (0.002/150)+Arctan 2
(0.002/150)] 0 . 5 ＝3.89″；
-X-direction yaw angle:
Ep＇＝E(+Y＇)＝2.29″。
adjusting a CCD assembly coordinate system: the size of the CCD6 is 61.44mmX32mm, the position of the CCD6 is adjusted by using a high power microscope of the splicer 1, the guiding precision of a linear guide rail of the splicer 1 within the range of 200mm is about 0 ', the orthogonal precision is 0', and the assembling precision angle of the CCD6 and the splicer 1 in each direction is adjusted to be 0 second;
the indicating prism 7 is calibrated: placing a reference prism 9 on the focal plane substrate 4, aligning and tightly attaching an optical flat ruler with the side surface of the focal plane substrate, and finishing and adjusting the angle of an indicating prism 7 to obtain the following data:
the angle readings of the reference prism 9 in the + Y direction and the-X direction of the theodolite are respectively as follows:
(0,89.9473)(0,89.8935)
the angle readings of the theodolite in the + Y direction and the-X direction of the indicating prism 7 are respectively as follows:
(0,89.9481)(0,89.8928)
the optical flat rule 10(-X direction deflection angle) theodolite positive reading is as follows: (0,89,9291)
The calibration angle errors of the indicating prism 7 are respectively as follows:
+ Y-direction pitch angle:
El＂＝(89.9473-89.9481)X3600＝2.88″；
-X-direction pitch angle:
Er＂＝(89.8935-89.8928)X3600＝2.52″；
-X-direction yaw angle:
Ep＂＝(0-0)X3600＝0″。
from the above, considering the perpendicularity error 2 ″ in each direction of the prism itself, the final assembly error of the prism 7 with the focal plane assembly is indicated:
+ Y-direction pitch angle:
El＝[El＇ 2 +El＂ 2 +2 2 ] 0 . 5 ＝5.2″；
-X-direction pitch angle:
Er＝[Er＇ 2 +Er＂ 2 +2 2 ] 0 . 5 ＝5.04″；
-X-direction yaw angle:
Ep＝[Ep＇ 2 +Ep＂ 2 +2 2 ] 0 . 5 ＝3.04″；
therefore, the error of the pitch angle of the indicating prism 7+ Y direction is the largest, and the maximum calibration error is 5.2 ".
According to the method for calibrating the indicating prism of the focal plane, the CCD splicing instrument is used as a medium, the focal plane substrate and the indicating prism coordinate system are adjusted to be consistent, the maximum calibration error of the focal plane and the prism can be 5.2' according to the final calibration result of the focal plane prism, accurate directions are provided for the use of subsequent focal planes, and the prism has a good effect in the subsequent use.
While certain exemplary embodiments of the present invention have been described above by way of illustration only, it will be apparent to those of ordinary skill in the art that the described embodiments may be modified in various different ways without departing from the spirit and scope of the invention. Accordingly, the drawings and description are illustrative in nature and should not be construed as limiting the scope of the invention.
Claims (2)
1. A calibration method of an indicating prism of a focal plane is characterized in that;
the method comprises the following steps:
s1: mounting a focal plane substrate (4);
the method comprises the following steps of installing a tool (2) on a platform of a CCD splicing instrument (1), and connecting a focal plane substrate (4) to the platform of the CCD splicing instrument (1) through the tool (2);
s2: adjusting the focal plane substrate (4) coordinate system;
fixing a dial indicator on the CCD splicing instrument (1), operating the CCD splicing instrument (1), and driving the dial indicator through the CCD splicing instrument (1) to respectively adjust the upper surface and the side surface of the focal plane substrate (4) to be consistent with the direction of a coordinate system of the CCD splicing instrument (1);
s3: mounting an indicator prism (7) to the focal plane substrate (4) with screws;
s4: adjusting the coordinate system of the indicating prism (7) by grinding;
placing the indicating prism (7) on the upper surface of the focal plane substrate (4), respectively collimating two mirror surfaces of a + Y plane and a + X plane of the indicating prism (7) by using two optical theodolites, reading pitch angle readings of the two theodolites, pitching and repairing the + X plane and the + Y plane of the indicating prism (7) to be consistent with a reference prism (9), attaching an optical flat ruler (10) to the side surface of the focal plane substrate (4), and adjusting the deflection of the indicating prism (7) in the plus X direction to be consistent with the optical flat ruler (10);
s5: mounting a CCD assembly;
s6: and adjusting a CCD assembly coordinate system, and adjusting the CCD assembly coordinate system to be consistent with the CCD splicing instrument (1) coordinate system by operating the CCD splicing instrument (1), so that the indicating prism (7) is consistent with the CCD assembly coordinate system, and the prism calibration can be finally realized.
2. The calibration method of the indicating prism of the focal plane according to claim 1, wherein;
the CCD assembly comprises a CCD (6) and a CCD mechanical seat (5), the CCD (6) is installed on the upper surface of the CCD mechanical seat (5), and the CCD mechanical seat (5) is installed on the upper surface of the focal plane substrate (4).
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2249591A5 (en) * | 1973-10-30 | 1975-05-23 | Sopelem | Environment compensating differential refractometer - mirrors reflect rays from collimator to eyepiece |
| RU106399U1 (en) * | 2011-01-27 | 2011-07-10 | Открытое Акционерное Общество "Пеленг" | OPTICAL ELECTRONIC SYSTEM |
| CN108759869A (en) * | 2018-06-20 | 2018-11-06 | 上海卫星工程研究所 | Rotating Platform for High Precision Star Sensor holder heat distortion test system |
| CN108759798A (en) * | 2018-06-20 | 2018-11-06 | 上海卫星工程研究所 | A kind of implementation method of high-precision spacecraft precision measure |
| CN111707291A (en) * | 2020-06-23 | 2020-09-25 | 上海航天控制技术研究所 | Automatic assembling and calibrating device and automatic assembling and calibrating method for star sensor focal plane |
| CN111854713A (en) * | 2020-07-30 | 2020-10-30 | 中国科学院长春光学精密机械与物理研究所 | Measuring reference device capable of being used for establishing coordinate system |
-
2022
- 2022-06-29 CN CN202210747676.1A patent/CN115112150B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2249591A5 (en) * | 1973-10-30 | 1975-05-23 | Sopelem | Environment compensating differential refractometer - mirrors reflect rays from collimator to eyepiece |
| RU106399U1 (en) * | 2011-01-27 | 2011-07-10 | Открытое Акционерное Общество "Пеленг" | OPTICAL ELECTRONIC SYSTEM |
| CN108759869A (en) * | 2018-06-20 | 2018-11-06 | 上海卫星工程研究所 | Rotating Platform for High Precision Star Sensor holder heat distortion test system |
| CN108759798A (en) * | 2018-06-20 | 2018-11-06 | 上海卫星工程研究所 | A kind of implementation method of high-precision spacecraft precision measure |
| CN111707291A (en) * | 2020-06-23 | 2020-09-25 | 上海航天控制技术研究所 | Automatic assembling and calibrating device and automatic assembling and calibrating method for star sensor focal plane |
| CN111854713A (en) * | 2020-07-30 | 2020-10-30 | 中国科学院长春光学精密机械与物理研究所 | Measuring reference device capable of being used for establishing coordinate system |
Non-Patent Citations (3)
| Title |
|---|
| 丛杉珊等: "具备调焦功能的空间光学载荷支撑结构设计", 《红外与激光工程》 * |
| 孟庆华等: "弹道相机面阵CCD焦平面的光学拼接", 《光机电信息》 * |
| 李朝辉等: "空间相机CCD焦平面的光学拼接", 《光学精密工程》 * |
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Denomination of invention: A Calibration Method for Indicating Prism of Focal Plane Effective date of registration: 20230724 Granted publication date: 20230418 Pledgee: Industrial and Commercial Bank of China Limited Changchun Southern Urban Economic Development Zone Branch Pledgor: Changguang Satellite Technology Co.,Ltd. Registration number: Y2023220000056 |