CN109374260B - Calibration system and calibration method for double collimation zero included angle of optical transmission device - Google Patents
Calibration system and calibration method for double collimation zero included angle of optical transmission device Download PDFInfo
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- CN109374260B CN109374260B CN201811365141.8A CN201811365141A CN109374260B CN 109374260 B CN109374260 B CN 109374260B CN 201811365141 A CN201811365141 A CN 201811365141A CN 109374260 B CN109374260 B CN 109374260B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
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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
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/10—Nuclear fusion reactors
Abstract
The invention relates to a calibration system and a calibration method for a double-collimation zero included angle of an optical transmission device. The system is simple in structure and can be used for calibrating the double-collimation zero-position included angle of the optical transmission device under the high-low temperature condition with high efficiency. The system comprises an electric control turntable, a double-sided reflecting mirror, a two-dimensional adjusting table, a first Proprietary prism device, a first multi-tooth dividing table, a second Proprietary prism device, a second multi-tooth dividing table, an auto-collimation theodolite and a plane reflecting mirror, wherein the electric control turntable, the double-sided reflecting mirror, the two-dimensional adjusting table and the first Proprietary prism device, the first multi-tooth dividing table, the second Proprietary prism device, the second multi-tooth dividing table, the auto-collimation theodolite and the plane reflecting mirror are arranged outside the constant-temperature test box.
Description
Technical Field
The invention belongs to the field of optics, and particularly relates to a calibration system and a calibration method for a double-collimation zero included angle of an optical transmission device.
Background
The optical transmission device is taken as an optical instrument, is widely applied to the field of spacecraft launching at present, and is an important component of an automatic aiming platform in the field. The optical transmission device has the function of performing small-angle measurement by utilizing the auto-collimation optical principle, can realize the aiming and transmission of azimuth information, and finally assists in completing the position orientation of the spacecraft launching.
The optical transmission device belongs to a multi-optical axis system and mainly comprises a large collimator and a small collimator. The zero angle of the large collimator and the small collimator, namely the double-collimation zero angle, is the most important performance index of the optical transmission device, and whether the calibration is accurate or not can directly influence the final position orientation precision.
The optical transmission device is applied to the field of spacecraft launching, and the use environment is an outdoor launching field, so that the optical transmission device has higher requirements on environmental adaptability. Currently, the operating temperature environment of the optical transfer device is-40 ℃ to +50 ℃. Under the high and low temperature conditions, the working states of the components are different from those of the components at normal temperature, and the double collimation zero included angle under the high and low temperature conditions is likely to deviate from the normal temperature. Obviously, when the optical transmission device leaves the factory, the meaning of only providing the calibration value of the double collimation zero-position included angle under the normal temperature condition is not great. Therefore, the accurate calibration of the double collimation zero angle under the high and low temperature conditions is crucial.
The calibration method of the double collimation zero angle under normal temperature is mature in technology, but under high and low temperature conditions, especially low temperature of-40 ℃ and high temperature of +50 ℃, no test instrument can meet the test requirement of the angle calibration under the extreme temperature conditions nowadays. In other words, the accurate calibration of the double collimation zero angle under the high and low temperature condition at present cannot be realized, and no reasonable and feasible technical scheme or calibration system can solve the problem. Therefore, the calibration of the double collimation zero angle under the high and low temperature conditions is a great difficulty.
For the above reasons, a calibration system for the double collimation zero included angle of the optical transmission device under the high and low temperature conditions is extremely needed.
Disclosure of Invention
In order to solve the problems in the background technology, the invention provides a calibration system and a calibration method which have simple structures and can efficiently calibrate the double-collimation zero included angle of the optical transmission device under the high and low temperature conditions.
The technical scheme of the invention is as follows:
the invention provides a calibration system for a double collimation zero included angle of an optical transmission device, which is characterized in that:
the device comprises a computer, a constant temperature test box, an electric control turntable, a double-sided reflecting mirror, a two-dimensional adjusting table, a first Proprietary prism device, a first multi-tooth dividing table, a second Proprietary prism device, a second multi-tooth dividing table, an auto-collimation theodolite and a plane reflecting mirror;
an optical window is arranged on the side wall of the constant temperature test chamber;
an electric control turntable is arranged in the constant temperature test box, an optical transmission device to be tested is placed on the electric control turntable, a two-dimensional adjusting table is arranged on a top cover of the optical transmission device to be tested, and a double-plane reflecting mirror is arranged on the two-dimensional adjusting table;
the computer is electrically connected with the constant temperature test box and the optical transmission device to be tested respectively;
an auto-collimation theodolite is arranged outside the constant temperature test box, and a plane reflector is erected on the side of the auto-collimation theodolite; the caliber of the plane reflector should cover the interval from the center of the small auto-collimator of the optical transmission device to be measured to the center of the double-sided reflector;
the first Proprietary prism device is arranged on the first multi-tooth indexing table, and the central height of the prism in the first Proprietary prism device is consistent with the central height of the small auto-collimator in the optical transmission device to be tested; a first Proprin prism device is positioned between the autocollimator theodolite and the optical window;
the second Proprietary prism device is arranged on the second multi-tooth indexing table, and the central height of the prism in the second Proprietary prism device is consistent with the central height of the large auto-collimator in the optical transmission device to be tested; a second Proprietary prism device is positioned between the autocollimator theodolite and the optical window.
Further, the optical window is made of quartz, the caliber is not smaller than phi 200mm, both sides of the optical window are plated with antireflection films, and the visible integral transmittance is more than 90%; the outer ring of the optical window is paved with heating resistance wires, and the resistance value is 45 omega plus or minus 10 omega.
Further, the double-sided mirror is adhered to the two-dimensional adjusting table through optical epoxy glue.
In order to make the whole calibration accuracy higher, the preferred parameters of each component in the system of the invention are as follows:
1. the first Pro prism device and the second Pro prism device are respectively provided with a triangular base and a round level bubble with the size of 6', the prisms are made of glass materials with the size of K9, the effective area is 45mm multiplied by 30mm, the two right-angle surfaces of the prisms are respectively plated with an internal reflection film, and the visible integral reflectivity is more than 96%; in the leveling state of the round level bubble, the prism has a prism unevenness not more than 30%.
2. The double-sided reflecting mirror is made of a glass material with the model number of K9, the caliber is phi 30mm, both sides are plated with external reflecting films, the integral reflectivity is over 96%, and the parallelism of the two reflecting surfaces is less than 2%.
3. The first multi-tooth indexing table and the second multi-tooth indexing table are provided with subdivision drums, the indexing accuracy is better than 0.2", and the bearing capacity is more than or equal to 10kg; the horizontal measurement accuracy of the auto-collimation theodolite is less than or equal to 0.5%.
4. The plane reflector is made of a glass material with the model number of K9, the caliber is phi 300mm, an internal reflection film is plated, the integral reflectivity is over 96%, and the surface shape accuracy RMS value is not lower than lambda/20.
5. The adjustable temperature range of the constant temperature test chamber is-55 ℃ to +80 ℃, and the temperature stability is +/-1 ℃.
6. The electric control turntable is a stepping motor turntable, the normal working environment temperature range is-50 ℃ to +60 ℃, and the bearing capacity is not lower than 10kg.
Further, in order to avoid the original top cover of the optical transmission device to be tested being damaged when the two-dimensional adjusting table is installed, the system adopts a universal top cover with the same shape, size and material as the top cover of the optical transmission device to be tested to replace the top cover of the optical transmission device to be tested, and the two-dimensional adjusting table is fixedly connected to the universal top cover.
Based on the above description of the structure of the calibration system, a method for calibrating by using the calibration system will be described:
【1】 Adjusting the tower difference of the two reflecting surfaces of the double-sided reflecting mirror;
leveling the autocollimation theodolite, and adjusting the autocollimation theodolite to a position with the center height equal to the center height of the double-sided reflecting mirror;
the method comprises the following steps of (1.2) collimating and aiming one reflecting surface of a double-sided reflecting mirror through an auto-collimation theodolite;
controlling the electric control turntable to rotate in the radial direction, adjusting the autocollimation theodolite to collimate and aim the other reflecting surface of the double-sided reflecting mirror by using the two-dimensional adjusting table, and requiring the tower difference to be below 2';
【2】 The central heights of the first Proprietary prism device and the second Proprietary prism device are respectively equal to the central heights of a small auto-collimator and a large auto-collimator of the optical transmission device to be tested; then leveling the first and second Proprin prism devices;
【3】 Calibrating and calculating;
starting a constant temperature test box, starting a high-temperature or low-temperature test, and keeping stable when the temperature reaches the requirement;
collecting a small misalignment angle of a small auto-collimator of an optical transmission device to be measured through a computer, observing a small misalignment angle value, and rotating a subdivision drum of a first multi-tooth indexing table to enable the small misalignment angle value to be zero, and recording the small misalignment angle value as a small zero position;
turning the first multi-tooth indexing table 180 ° while leading out the small zero position to the prism normal of the first Proprin prism device; changing the central height of the auto-collimation theodolite to be equal to the central height of the first Proprin prism device, and leveling the auto-collimation theodolite;
rotating the auto-collimation theodolite to enable the auto-collimation theodolite to conduct collimation aiming on the plane reflecting mirror and clear azimuth value, rotating the auto-collimation theodolite to conduct collimation aiming on the first Proprin prism device, and reading azimuth value H A ；
Changing the center height of the auto-collimation theodolite to be equal to the center height of the double-sided reflecting mirror, and leveling the auto-collimation theodolite;
rotating the auto-collimation theodolite to enable the auto-collimation theodolite to conduct collimation aiming on the plane reflecting mirror and clear azimuth value, rotating the auto-collimation theodolite to conduct collimation aiming on one reflecting surface of the double-sided reflecting mirror at the moment, and reading azimuth value H m1 ；
[ 3.6 ] the other reflecting surface of the double-sided reflecting mirror 6 is collimated and aimed by using an auto-collimation theodolite and the azimuth value H is read by controlling the electric control turntable to rotate to the diameter direction of the double-sided reflecting mirror m2 ；
Collecting a large misalignment angle of a large auto-collimator 8 of an optical transmission device to be detected through a computer, observing the large misalignment angle value, and rotating a subdivision drum of a second multi-tooth indexing table to enable the large misalignment angle value to be zero, and recording the large misalignment angle value as a large zero position;
turning the second multi-tooth indexing table 180 ° while leading out the large zero position to the prism normal of the second Proprin prism device; changing the central height of the auto-collimation theodolite to be equal to the central height of the second Proprietary prism device, and leveling the auto-collimation theodolite;
rotating the auto-collimation theodolite to enable the auto-collimation theodolite to conduct collimation aiming on the plane reflecting mirror and clear azimuth value, rotating the auto-collimation theodolite to conduct collimation aiming on the second Proprin prism device and reading azimuth value H B ；
[ 3.10 ] is according to the formula Δ=h B -H A -(H m1 -H m2 ) And calculating and calibrating the double collimation zero angle of the optical transmission device to be measured.
The invention has the advantages that:
1. is pioneering. The invention adopts a mature and reliable technical means, and is realized by providing calibrated environmental conditions in the constant temperature test box and calibrated test conditions outside the constant temperature test box. The test equipment and the test instrument are separated and do not interfere with each other; and then the connection between the two is established through the auto-collimation light path, and the environment test and the included angle calibration are combined, so that an original technical scheme and a calibration system are provided, and the problem that the double-collimation zero included angle of the optical transmission device cannot be calibrated under the original high-low temperature condition is thoroughly solved.
2. The structure is simple. The invention is divided into two parts of a test subsystem (comprising a constant temperature test box, an electric control turntable, an optical transmission device to be tested, a computer and the like) and a test subsystem (comprising a Proprietary prism device, an auto-collimation theodolite, a multi-tooth dividing table, a plane reflecting mirror and the like), and establishes connection through an auto-collimation light path to form a set of calibration system, and has simple structure and easy realization.
3. High efficiency. The invention adopts the constant temperature test box, provides reliable test environment conditions, adopts the electric control turntable in the constant temperature test box, and realizes the position control of the tested optical transmission device under the high and low temperature conditions; the combination of two sets of fixed station Proprietary prism devices and a multi-tooth dividing table is adopted outside the constant temperature test box, and a plane reflector is adopted as a calibration standard. Therefore, the station of the instrument and the equipment adopted by the invention is fixed, the position rotation of the optical transmission device to be tested is also completed by electric control, and the position of the auto-collimation theodolite is only required to be changed in the calibration process. Therefore, the invention has reasonable structural layout, clear and smooth calibration procedure, and the whole calibration process is not more than 15min, thereby fundamentally realizing high efficiency.
4. High precision. The invention adopts the autocollimation theodolite with the measurement accuracy being better than 0.5", the multi-tooth dividing table with the dividing accuracy being better than 0.2' and other test instruments, and the test instruments are all arranged outside the constant temperature test box, the test environment temperature has no influence on the test instruments, and the high accuracy advantage of the test instruments is ensured; meanwhile, the invention also adopts a series of equipment and measures such as a plane reflector with the surface shape accuracy RMS value not lower than lambda/20, a double-sided reflector with the two-sided parallelism not higher than 2', an optical window capable of heating to prevent frosting and the like, and the stability and the accuracy of the whole calibration process are strongly ensured. The final comprehensive calibration precision of the invention is not more than 3", the requirement of dual collimation zero-position included angle calibration of the optical transmission device under the high and low temperature conditions is completely satisfied, and the high precision is fundamentally realized.
Drawings
FIG. 1 is a schematic diagram of a dual level calibration system for an auto-collimation theodolite according to the present invention.
1-an autocollimation theodolite; 2-a second Proprin prism device; 3-a first Proprin prism device; 4-an optical window; 5-universal top cap; 6-double-sided mirrors; 7-a two-dimensional adjusting table; 8-large autocollimators; 9-plane mirrors; 10-a second multi-tooth indexing table; 11-a first multi-tooth indexing table; 12-an optical transmission device to be measured; 13-small autocollimators; 14-an electric control turntable; 15-a constant temperature test box; 16-a notebook computer; 17-wire vias; 18-cable.
Detailed Description
The technical scheme of the invention is further described from the basic architecture, system composition and calibration method of the system:
basic architecture
The calibration system for the double-collimation zero-position included angle of the optical transmission device comprises an electric control turntable, an optical transmission device to be tested, a two-dimensional adjusting table, a double-sided reflecting mirror, a first Proprin prism device, a first multi-tooth dividing table, a second Proprin prism device, a second multi-tooth dividing table, an auto-collimation theodolite and a plane reflecting mirror, wherein the electric control turntable, the optical transmission device to be tested, the two-dimensional adjusting table and the double-sided reflecting mirror are arranged in a constant temperature test box;
all components in the constant temperature test box are connected with a computer to establish an optical path through an optical window on the constant temperature test box and an optical path outside the constant temperature test box, so that a test subsystem is formed; all parts outside the constant temperature test box are combined together to form a test subsystem; the two sub-systems are combined into a set of calibration system by establishing connection through an auto-collimation light path.
System composition
The detailed composition of the system is shown in fig. 1, and comprises a computer 16, a constant temperature test box 15, an electric control turntable 14, a double-sided reflecting mirror 6, a two-dimensional adjusting table 7, a first Proprietary prism device 3, a first multi-tooth indexing table 11, a second Proprietary prism device 2, a second multi-tooth indexing table 10, an auto-collimation theodolite 1 and a plane reflecting mirror 9;
the side wall of the constant temperature test chamber 15 is provided with an optical window 4 and a wire passing hole;
an electric control turntable 14 is arranged in the constant temperature test box 15, an optical transmission device 12 to be tested is placed on the electric control turntable 14, a two-dimensional adjusting table 7 is arranged on the top cover of the optical transmission device 12 to be tested, and a double-plane reflecting mirror 6 is arranged on the two-dimensional adjusting table 7;
the computer 16 is electrically connected with the constant temperature test box 15 and the optical transmission device 12 to be tested respectively;
the outside of the constant temperature test box 15 is provided with an auto-collimation theodolite 1, and a plane mirror 9 is erected on the side of the auto-collimation theodolite 1; the caliber of the plane reflector 9 is required to cover the interval from the center of the small auto-collimator 13 of the optical transmission device to be measured to the center of the double-sided reflector 6;
the first Proprin prism device 3 is arranged on the first multi-tooth indexing table 11, and the central height of the prism in the first Proprin prism device 3 is consistent with the central height of the small auto-collimator 13 in the optical transmission device to be tested; a first Proprin prism device 3 is located between the autocollimator theodolite 1 and said optical window 4;
the second Proprietary prism device 2 is arranged on the second multi-tooth indexing table 10, and the central height of the prism in the second Proprietary prism device 2 is consistent with the central height of the large auto-collimator 8 in the optical transmission device to be tested; a second Proprin prism device 2 is located between the autocollimator theodolite and said optical window 4.
The optical transmission device 12 to be measured is a device to be measured, and the double collimation zero angle is an item to be calibrated. The large autocollimator 8 and the small autocollimator 13 of the optical transmission device under test are internal components of the optical transmission device under test 12, the zero position of which is part of the item under test.
The auto-collimation theodolite 1 is an I-level theodolite applied to the fields of equal-angle triangulation and precision engineering measurement, and the horizontal return accuracy is better than 0.5%.
The optical window 4 is arranged on the side wall of the constant temperature test box 15, the glass material is quartz, the caliber is not smaller than phi 200mm, both sides are plated with antireflection films, and the visible integral transmittance is more than 90%; the outer ring of the optical window 4 is paved with heating resistance wires with the resistance value of 45 omega plus or minus 10 omega, and a switch is arranged on the constant temperature test box 15 so as to prevent the optical window 4 from frosting under the low temperature condition.
In addition, a universal top cover 5 with the same shape, size and material as the top cover of the optical transmission device to be tested is adopted in the system to replace the top cover of the optical transmission device to be tested, a two-dimensional adjusting table 7 is fixedly connected on the top cover, and a double-sided reflecting mirror 6 is arranged on the top cover (the double-sided reflecting mirror 6 is fixedly connected on the two-dimensional adjusting table 7 through optical epoxy glue); the universal top cover 5 provides a platform for mounting the two-dimensional adjustment table 7 and the double-sided mirror 6 during testing, so as not to damage the structure and paint surface of the top cover of the optical transfer device 12 to be tested.
Parameter description
The second Proprietary prism device 2 is provided with a triangular base and a round level bubble of 6', and the central height of the prism is consistent with the central height of a large auto-collimator 8 of the optical transmission device 12 to be measured; the second Proprin prism device 2 is a cooperative target for the information acquisition of the misalignment angle of the large auto-collimator 8 and the determination of the collimation zero position; the glass material of the prism is K9, the effective area is 45mm multiplied by 30mm, both right-angle surfaces are plated with internal reflection films, and the visible integral reflectivity is over 96 percent; in the leveling state of the round level bubble, the prism has a prism unevenness not more than 30%.
The first Proprietary prism device 3 is provided with a triangular base and a round level bubble of 6', and the central height of the prism is consistent with the central height of the small auto-collimator 13 of the optical transmission device 12 to be measured; the first Proprin prism device 3 is a cooperative target for the information acquisition of the misalignment angle of the small auto-collimator 13 and the determination of the collimation zero position; the glass material of the prism is K9, the effective area is 45mm multiplied by 30mm, both right-angle surfaces are plated with internal reflection films, and the visible integral reflectivity is over 96 percent; in the leveling state of the round level bubble, the prism has a prism unevenness not more than 30%.
The glass material of the double-sided reflecting mirror 6 is K9, the caliber is phi 30mm, the double sides are plated with external reflecting films, the integral reflectivity is over 96 percent, and the parallelism of the two sides is not more than 2 percent.
The glass material of the plane reflector 9 is K9, the caliber is phi 300mm, an internal reflection film is plated, the visible integral reflectivity is more than 96%, and the surface shape accuracy RMS value is not lower than lambda/20; the planar mirror 9 provides a reference for the whole test calibration process.
The second multi-tooth indexing table 10 has a subdivision drum with indexing accuracy better than 0.2 "and a carrying capacity not lower than 10kg.
The first multi-tooth indexing table 11 is provided with a subdivision drum, the indexing accuracy is better than 0.2", and the carrying capacity is not lower than 10kg.
The electric control turntable 14 is a stepping motor turntable and is fixedly connected inside the constant temperature test box, the normal working environment temperature range is-50 ℃ to +60 ℃, and the bearing capacity is not lower than 10kg; the table top of the electric control turntable 14 is sequentially provided with an optical transmission device 12 to be tested, a universal top cover 5, a two-dimensional adjusting table 7 and a double-sided reflecting mirror 6 from bottom to top, so that rotation in the radial direction in the test is realized.
The constant temperature test chamber 15 can simulate the required high and low temperature conditions, the controllable temperature range is-55 ℃ to +80 ℃, the requirements of the low temperature-40 ℃ and the high temperature +50 ℃ of the optical transmission device of the device to be tested are met, and the temperature stability is +/-1 ℃.
The computer 16 is provided with control software which can control the rotation of the electric control turntable, collect the misalignment angle information of the large and small autocollimators of the optical transmission device to be tested and determine the collimation zero position; the computer 16 passes through a wire passing hole 17 of the constant temperature test box 15 through a cable 18 and is connected with the optical transmission device 12 to be tested and the electric control turntable 14.
Assembling process and calibrating process
System assembly
The electric control turntable 14 is fixedly connected inside the constant temperature test box 15, the optical transmission device 12 to be tested is fixedly connected on the table top of the electric control turntable 14, and the light outlet direction of the small auto-collimator 13 of the optical transmission device to be tested is aligned with the optical window 4 of the constant temperature test box 15; the electric control turntable 14, the optical transmission device 12 to be tested and the notebook computer 16 are connected by a cable 18 through a wire through hole 17 on the side wall of the constant temperature test box 15; disassembling the top cover of the optical transmission device 12 to be tested, installing the universal top cover 5, and fixedly connecting the two-dimensional adjusting table 7 on the universal top cover 5; the double-sided reflecting mirror 6 is fixedly connected to the two-dimensional adjusting table 7 through optical epoxy glue, and the normal direction of the double-sided reflecting mirror 6 is approximately parallel to the optical axis direction of the large autocollimator 8 or the small autocollimator 13 of the optical transmission device to be tested.
A second multi-tooth indexing table 10 and a first multi-tooth indexing table 11 are arranged outside the constant temperature test chamber 15, namely between the optical window 4 and the auto-collimation theodolite 1, and the second prism device 2 and the first prism device 3 are respectively erected on the second multi-tooth indexing table 10 and the first multi-tooth indexing table 11.
Calibration process
1. Erecting and leveling an auto-collimation theodolite 1 outside a constant temperature test box 15, wherein the center height of the auto-collimation theodolite 1 is equal to the center height of a double-sided reflecting mirror 6; the double-sided reflecting mirror 6 is collimated and aimed through the auto-collimation theodolite 1, then the computer 16 controls the electric control turntable 14 to rotate in the radial direction, the auto-collimation image of the auto-collimation theodolite 1 is observed, and the tower difference is regulated to be below 2' by using the two-dimensional regulating table 7 in combination with the pitching value;
2. the center height of the second Proprietary prism device 2 is equal to the center height of the large auto-collimator 8 of the optical transmission device to be measured, the center height of the first Proprietary prism device 3 is equal to the center height of the small auto-collimator 13 of the optical transmission device to be measured, and the first Proprietary prism device is leveled by the triangular base and the round level bubble of the Proprietary prism device;
3. starting a power supply of the constant temperature test chamber 15, starting a high-temperature or low-temperature test after a test program is set, and calibrating a double-collimation zero-position included angle of the optical transmission device 12 to be tested after the temperature reaches a required value and is kept stable; when a low-temperature test is performed, the heating of the optical window 4 is started in the whole process so as to prevent the optical window 4 from frosting;
4. collecting a small misalignment angle of a small auto-collimator 13 of an optical transmission device to be measured through a computer 16, observing the small misalignment angle value, and rotating a subdivision drum of the multi-tooth indexing table A11 to enable the small misalignment angle value to be zero, and recording the small misalignment angle value as a small zero position;
5. rotating the first multi-tooth indexing table 11 by 180 degrees, wherein the small zero position is led out to the normal line of the first Proprism device 3; changing the central height of the auto-collimation theodolite 1 to be equal to the central height of the first Proprin prism device 3, and leveling the auto-collimation theodolite 1;
6. the auto-collimation theodolite 1 is rotated to perform collimation aiming on the plane mirror 9 and zero the azimuth value, and then the auto-collimation theodolite 1 is rotated to perform collimation aiming on the first Proprin prism device 3 and read the azimuth value H A ；
7. Changing the central height of the auto-collimation theodolite 1 to be equal to the central height of the double-sided reflecting mirror 6, and leveling the auto-collimation theodolite 1;
8. the auto-collimation theodolite 1 is rotated to perform collimation aiming on the plane reflecting mirror 9 and zero the azimuth value, and then the auto-collimation theodolite 1 is rotated to perform collimation aiming on one reflecting surface of the double-sided reflecting mirror 6 and read the azimuth value H m1 ；
9. The computer 16 controls the electric control turntable 14 to rotate to the radial direction of the double-sided reflecting mirror 6, and the autocollimation theodolite 1 is used for collimating and aiming the other reflecting surface of the double-sided reflecting mirror 6 and reading the azimuth value H m2 ；
10. Collecting a large misalignment angle of a large auto-collimator 8 of an optical transmission device to be measured through a computer 16, observing the large misalignment angle value, and rotating a subdivision drum of a second multi-tooth indexing table 10 to enable the large misalignment angle value to be zero, and recording the large misalignment angle value as a large zero position;
11. rotating the second multi-tooth indexing table 10 by 180 degrees, wherein the large zero position is led out to the prism normal line of the second Proprism device 2; changing the central height of the auto-collimation theodolite 1 to be equal to the central height of the second Proprin prism device 2, and leveling the auto-collimation theodolite 1;
12. rotating the autocollimating theodolite 1 to make it perform collimation aiming on the plane mirror 9 and zero the azimuth value, and then rotating the autocollimating theodolite 1 to perform collimation aiming on the second Proprin prism device 2 and reading the azimuth value H B ；
13. According to the formula Δ=h B -H A -(H m1 -H m2 ) And calculating and calibrating the double collimation zero angle of the optical transmission device to be measured.
The technical scheme provided by the invention thoroughly solves the calibration problem of the double collimation zero included angle of the optical transmission device under the high and low temperature conditions, the whole calibration process is not more than 15min, and the comprehensive calibration precision is not more than 3%.
Claims (10)
1. A calibration system for a double collimation zero included angle of an optical transmission device is characterized in that:
the device comprises a computer, a constant temperature test box, an electric control turntable, a double-sided reflecting mirror, a two-dimensional adjusting table, a first Proprietary prism device, a first multi-tooth dividing table, a second Proprietary prism device, a second multi-tooth dividing table, an auto-collimation theodolite and a plane reflecting mirror;
an optical window is arranged on the side wall of the constant temperature test chamber;
an electric control turntable is arranged in the constant temperature test box, an optical transmission device to be tested is placed on the electric control turntable, a two-dimensional adjusting table is arranged on a top cover of the optical transmission device to be tested, and a double-plane reflecting mirror is arranged on the two-dimensional adjusting table;
the computer is electrically connected with the constant temperature test box and the optical transmission device to be tested respectively;
an auto-collimation theodolite is arranged outside the constant temperature test box, and a plane reflector is erected on the side of the auto-collimation theodolite; the caliber of the plane reflector should cover the interval from the center of the small auto-collimator of the optical transmission device to be measured to the center of the double-sided reflector;
the first Proprietary prism device is arranged on the first multi-tooth indexing table, and the central height of the prism in the first Proprietary prism device is consistent with the central height of the small auto-collimator in the optical transmission device to be tested; a first Proprin prism device is positioned between the autocollimator theodolite and the optical window;
the second Proprietary prism device is arranged on the second multi-tooth indexing table, and the central height of the prism in the second Proprietary prism device is consistent with the central height of the large auto-collimator in the optical transmission device to be tested; a second Proprietary prism device is positioned between the autocollimator theodolite and the optical window.
2. The calibration system for a double collimation zero angle of an optical transmission device according to claim 1, wherein: the optical window is made of quartz, the caliber is not smaller than phi 200mm, both sides are plated with an antireflection film, and the visible integral transmittance is more than 90%; the outer ring of the optical window is paved with heating resistance wires, and the resistance value is 45 omega plus or minus 10 omega.
3. The calibration system for the double collimation zero angle of the optical transmission device according to claim 2, wherein: the double-sided reflecting mirror is adhered to the two-dimensional adjusting table through optical epoxy glue.
4. A calibration system for a double collimation zero angle of an optical transmission device according to claim 3, wherein: the first Proprism device and the second Proprism device are respectively provided with a triangular base and a 6' round level bubble, the prisms are made of a glass material with the model of K9, the effective area is 45mm multiplied by 30mm, the two right-angle surfaces of the prisms are respectively plated with an internal reflection film, and the visible integral reflectivity is more than 96%; in the leveling state of the round level bubble, the prism has a prism unevenness of not more than 30'.
5. The calibration system for the double collimation zero angle of the optical transmission device according to claim 4, wherein: the double-sided reflecting mirror is made of a glass material with the model number of K9, the caliber is phi 30mm, both sides are plated with external reflecting films, the integral reflectivity is over 96%, and the parallelism of the two reflecting surfaces is less than 2'.
6. The calibration system for the double collimation zero angle of the optical transmission device according to claim 5, wherein: the first multi-tooth indexing table and the second multi-tooth indexing table are provided with subdivision drums, the indexing accuracy is better than 0.2', and the bearing capacity is more than or equal to 10kg; the horizontal measurement accuracy of the auto-collimation theodolite is less than or equal to 0.5'.
7. The calibration system for the double collimation zero angle of the optical transmission device according to claim 6, wherein: the plane reflector is made of a glass material with the model number of K9, the caliber is phi 300mm, an internal reflection film is plated, the integral reflectivity is over 96%, and the surface shape accuracy RMS value is not lower than lambda/20.
8. The calibration system for the double collimation zero angle of the optical transmission device according to claim 7, wherein: the adjustable temperature range of the constant temperature test box is-55 ℃ to +80 ℃, and the temperature stability of the constant temperature test box is +/-1 ℃; the electric control turntable is a stepping motor turntable, the normal working environment temperature range is-50 ℃ to +60 ℃, and the bearing capacity is not lower than 10kg.
9. A calibration system for a double collimation zero angle of an optical transfer device according to any one of claims 1-8, characterized in that: the universal top cover with the same shape, size and material as the top cover of the optical transmission device to be tested is adopted to replace the top cover of the optical transmission device to be tested, and the two-dimensional adjusting table is fixedly connected on the universal top cover.
10. The calibration method for the double collimation zero angle of the optical transmission device is characterized by adopting the calibration system as claimed in claim 9, and comprises the following specific implementation steps:
【1】 Adjusting the tower difference of the two reflecting surfaces of the double-sided reflecting mirror;
leveling the autocollimation theodolite, and adjusting the autocollimation theodolite to a position with the center height equal to the center height of the double-sided reflecting mirror;
the method comprises the following steps of (1.2) collimating and aiming one reflecting surface of a double-sided reflecting mirror through an auto-collimation theodolite;
controlling the electric control turntable to rotate in the radial direction, adjusting the autocollimation theodolite to collimate and aim the other reflecting surface of the double-sided reflecting mirror by using the two-dimensional adjusting table, and requiring the tower difference to be below 2';
【2】 The central heights of the first Proprietary prism device and the second Proprietary prism device are respectively equal to the central heights of a small auto-collimator and a large auto-collimator of the optical transmission device to be tested; then leveling the first and second Proprin prism devices;
【3】 Calibrating and calculating;
starting a constant temperature test box, starting a high-temperature or low-temperature test, and keeping stable when the temperature reaches the requirement;
collecting a small misalignment angle of a small auto-collimator of an optical transmission device to be measured through a computer, observing a small misalignment angle value, and rotating a subdivision drum of a first multi-tooth indexing table to enable the small misalignment angle value to be zero, and recording the small misalignment angle value as a small zero position;
turning the first multi-tooth indexing table 180 ° while leading out the small zero position to the prism normal of the first Proprin prism device; changing the central height of the auto-collimation theodolite to be equal to the central height of the first Proprin prism device, and leveling the auto-collimation theodolite;
rotating the auto-collimation theodolite to enable the auto-collimation theodolite to conduct collimation aiming on the plane reflecting mirror and clear azimuth value, rotating the auto-collimation theodolite to conduct collimation aiming on the first Proprin prism device, and reading azimuth value H A ；
Changing the center height of the auto-collimation theodolite to be equal to the center height of the double-sided reflecting mirror, and leveling the auto-collimation theodolite;
rotating the auto-collimation theodolite to enable the auto-collimation theodolite to conduct collimation aiming on the plane reflecting mirror and clear azimuth value, rotating the auto-collimation theodolite to conduct collimation aiming on one reflecting surface of the double-sided reflecting mirror at the moment, and reading azimuth value H m1 ；
[ 3.6 ] the other reflecting surface of the double-sided reflecting mirror is collimated and aimed by using an auto-collimation theodolite and the azimuth value H is read by controlling the electric control turntable to rotate to the diameter direction of the double-sided reflecting mirror m2 ；
Collecting a large misalignment angle of a large auto-collimator of an optical transmission device to be detected through a computer, observing a large misalignment angle value, rotating a subdivision drum of a second multi-tooth indexing table to enable the large misalignment angle value to be zero, and recording the large misalignment angle value as a large zero position;
turning the second multi-tooth indexing table 180 ° while leading out the large zero position to the prism normal of the second Proprin prism device; changing the central height of the auto-collimation theodolite to be equal to the central height of the second Proprietary prism device, and leveling the auto-collimation theodolite;
rotating the auto-collimation theodolite to enable the auto-collimation theodolite to conduct collimation aiming on the plane reflecting mirror and clear azimuth value, rotating the auto-collimation theodolite to conduct collimation aiming on the second Proprin prism device and reading azimuth value H B ；
[ 3.10 ] is according to the formula Δ=h B -H A -(H m1 -H m2 ) And calculating and calibrating the double collimation zero angle of the optical transmission device to be measured.
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| CN113108693A (en) * | 2021-04-01 | 2021-07-13 | 南京理工大学 | Quick zero detection device and method |
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