Optical fibres identification method and device for its implementation

FIELD: physics.

SUBSTANCE: optical probing signal is entered into each fibre of the optical line. Each specified signal which passed through the respective fibre of the line is consistently read out and an optical fibre in the line is identified on the basis of the received signal. The probing signal for each fibre of the line has a unique sequence of optical impulses which characterizes the number of optical fibre in the line.

EFFECT: automation of the process of identification of optical fibres, improvement of reliability of identification of the ends of optical fibres irrespective of their number, arrangement and colour marking.

2 cl, 2 dwg, 1 tbl

 

The invention relates to the field of fiber optical communication and can be used in fiber optic communication systems.

There is also known a method of identifying a damaged optical fiber (patent RF №2256161, G01M 11/02, H04B 10/08, 10.07.2005), namely that the pre-measured reference data backscattering fiber optic, remember it later with a preset time interval, periodically measure the current characteristics of the backscattering of the same fiber at the same parameters of the sounding and the damaged optical fiber identified as a result of comparison of the control and current characteristics of the backscattering of the optical fiber, wherein calculate a matrix:

where ||C|| - covariance matrix of the control and current characteristics of the backscattering of the optical fiber, and Dk- the variance of the control characteristics of the backscattering, and identify optical fiber as damaged by deflection of at least one of the members of the matrix ||Es|| from units greater than a predetermined threshold value.

The disadvantage of analog is the need to measure the characteristics of optical fibers, the continuous comparison of the original and the current value of backscattering, and t�activate the inability to simultaneously work with multiple optical fibers.

A device for visual identification of cable wiring or piping to determine the position of the ends of cords, wires, cables or pipelines (RF patent No. 2294001, G02B 6/44, 20.02.2007) containing in or on each cord, wire, cable or pipe that need to be identified, at least one optical fiber running from the first connector to the other connector of the specified cord, wire, cable or conduit and the first end of each of optical fibers available on the respective connector cord, wire, cable or pipe with the possibility of illumination by means of light entering into the fiber, and the second end of the optical fiber on the other end of the same cord, wire, cable or conduit and configured to receive therein the light introduced into the fiber at the first connector, wherein one or each optical fiber embedded in or on the cord, wire, cable or tubing, has two curved end, the first curved end, the funds available for input light, and a second curved end that is available for receiving light, wherein the curved ends of the optical fiber or optical fibers are recessed in the slots, provided in the two ends of the cord, wire, cable or pipe.

The disadvantage of analogue are limited func�social opportunities, due to its effect on small distances within the building, due to copper cables and visible spectrum radiation. In addition, you must have at least one optical fiber each tested cable, wire, cord, tubing, and bent the ends of the optical fibers lead to damage of the entire cable as a whole.

A device diagnostic fiber optic tracts (patent RF №2180436, G01M 11/02, 10.03.2002) containing successively installed a radiation source, a directional coupler, one output of which is connected to the optical input of the photodetector, and the second with the input device radiation in the controlled segment of optical fiber, two microcontrollers, digital indicator, reprogrammable permanent storage device, the pulse extender, remote control, pulse shaper, programmable attenuator, comparator, switch, analog-to-digital Converter, the second photodetector, the optical connector, moreover, the optical input of the second photodetector is connected to the output of the controlled segment of the optical fiber through an optical coupler, one of the inputs of the input port of the first microcontroller connected to the outputs of the photodetectors through the switch, programmable attenuator, controlled by the second microcontroller, and the Communist�Thor, one of the input ports of the first microcontroller is connected to one of output ports of the second microcontroller, one of the outputs of the output port of the first microcontroller is connected to one of inputs of the input port of the second microcontroller, and another output coupled to a control input of the radiation source through the pulse shaper, the analog input of analog-to-digital Converter connected to the output of the attenuator via the extender pulses, controlled by the second microcontroller, and the digital output of the analog-to-digital Converter is connected to the input port of the second microcontroller, the other ports of input-output of the second microcontroller connected to the digital indicator, control panel, reprogrammable permanent storage device.

The disadvantages of analogue are the design complexity, low productivity of the process of identification of the optical fibers due to the possibility of simultaneously testing one optic fiber, the low accuracy of the identification of the ends of the optical fibers and the inability to work at remote ends of the cable segment.

The closest in technical essence and the achieved result to the claimed is a method of identifying an optical fiber (patent RF №2400783, G02B 6/14, G02B 6/02, 27.07.2010), namely that near� the end of the optical fiber is introduced optical probe signal, accept coming to the near end of the optical fiber, the backscattered signal and the results of its processing to assess differential mode delay, an optical probe signal injected into the optical fiber in the form of a sequence of optical pulses arriving at the near end of the optical fiber, the backscattered signal is fed to the input of the analyzer of polarization of optical radiation, the output of which take the power of optical radiation of one polarization and measure the characteristics of backscattering, if beating which is below a preset level identify a multimode optical fiber with elevated values of differential mode delay.

The disadvantage of analogue are limited functionality due to the use of only one probe signal, and the impossibility of identification of the optical cable segment at the remote end due to the lack of the transmitting optical module and the receiving optical module in remote version.

The closest in technical essence and the achieved result to the claimed is a device identification of the optical fibers (RF patent No. 51757, G02B 6/00, H04B 3/52, 27.02.2006) containing a transmitter and receiver connected by an optical cable, when e�Ohm transmitter comprises a source of information the output of which is connected to the input of the electro-optical Converter, the output of which through the block of input optical signals is connected with the optical cable, the opposite end of which is associated with the optical information signal photodetector, dual channel optical reflectometer operating at two wavelengths, the output of which is connected to the second input of the block of input optical signals, the determining device, the optical pulse generator and the processing unit optical pulse start generator, and the digital output of the reflectometer is connected to the input of a casting device, one of the outputs which is connected to the control input time domain reflectometer (OTDR and the second output of a casting device connected to the input of the pulse forming network run optical pulse generator, an optical output of which is connected with the third input unit of input optical signals, identical fiber-optic information-diagnostic system for transmitting in the opposite direction with the transmission of information, and carried on a different wavelength on the same optical fiber, and each of them entered the block of adjustment of the generator, reference generator, a delay unit and the reflection unit, in which the output and the first input of the block adjustment of the generator are connected respectively to the input and the first reference output�about generator, the second and third inputs of the block of adjustment of the generator are connected respectively with the output of the photodetector and the output of the data receiver and the second and third outputs of the reference oscillator are connected respectively to the second input of a casting device and the second input of the electro-optical Converter, in which the changes that allow you to control the generated optical signals, and, in addition, in the optical fiber between the reflectometer with an advanced algorithm, the processing of the reflected signal with the control circuit forming a scanning pulse from a casting device, and a block of input optical signals, implemented by a spectral demultiplexer/multiplexer, further performing the functions of a spectral-selective element, with four exits/entrances, consistently included the reflection unit, the input of which is connected to the output of the delay block, which is connected to the input with the output of a casting device.

Disadvantages closest analogue is the design complexity, low productivity of the process of identification of optical fibers, the low accuracy of the identification of the ends of the optical fibers and the inability to simultaneously identify multiple optical fibers.

The object of the invention is the ability to work at remote ends to�belingo segment, as well as improving the performance of the identification process of optical fibers by quickly determining the necessary pairs to splice and due to the simultaneous identification of multiple optical fibers.

The technical result - the automation of the identification process of optical fibers, improving the reliability of the identification of the ends of the optical fibers irrespective of their number, location, and color of marking.

The problem is solved and the technical result is achieved by a method of identifying optical fibers which end in the middle of the investigated lines in an optical fiber is introduced optical probe signal, and then read it in from the optical fiber at the far end of the sample line according to the invention will first do a start of generation of optical pulses of the transmitting optical module through block start generating device, the transmitting optical module is connected to the studied lines, then in the middle end of the sample line in the bundle of optical fibers is injected through the block of input optical signals of the optical probe signals, each of which has a non-repeating sequence of optical pulses, and at the far end of the examined line by alternately connecting the test opt�ical fiber to the receiving optical module is read from the optical fiber code number signal of the transmitting optical fiber, and the results of its processing in the form of matching the output of the transmitter - code word", the number of the investigated fiber display on the display unit of the receiving optical module.

The problem is solved and the technical result is also achieved by a device identification of optical fibers, comprising a transmitting optical fiber and the receiving optical module, connected with an optical cable, which according to the invention, the transmitting optical module contains the processor unit, coupled to the first input-output unit with the software update and the second output with display unit, the input of which is connected to the block start generating equipment connected to the second input of the processor device, to the third input of which is connected a crystal oscillator, and to a fourth input of the processor unit connected to the battery unit connected with the power source, connected with the fourth input of the processor unit, and the third output of the processor device is connected with power electronic switches connected to the unit of electro-optical converters associated with the block of input optical signals, and the receiving optical module contains the processor unit, coupled to the first input-output unit pack prog�mnogo security thus to the second input of the processor block devices are connected opto-electronic Converter connected in series with the output unit of the optical signal and the second output processor unit connected to the display unit associated with the tuner display, and to the third input of the processor devices are connected with the battery pack connected to the power source connected to the third input of the processor device, and to a fourth input of processor devices connected to a quartz resonator.

The invention is illustrated by drawings.

Fig.1 shows a block diagram of the transmitting optical module, Fig.2 - block diagram of the receiving optical module.

The device identification of the optical fibers includes United optical cable transmitting optical fiber and the receiving optical module. The transmitting optical module (Fig.1) comprises a processing unit 1 connected to the first input-output unit software update 2 and the second output with display unit 3, to the input of which is connected to the block start generating equipment connected to the second input of the processor unit 1, to the third input of which is connected a crystal oscillator 5. To the fourth input of the processor unit 1 connected�Yong battery pack 6, associated with the power source 7 connected to the fourth input of the processor unit 1. The third output of the processor unit 1 is associated with the block of electronic keys 8, coupled with a block of electro-optical converters 9 associated with a block of the input optical signal 10.

The receiving optical module (Fig.2) contains the processor unit 11, connected to the first input-output unit software update 12. To the second input of the processor device 11 is connected to the block of optical-electronic Converter 13 connected in series with the output unit of the optical signal 14. The second output of the processor device 11 is connected to the display unit 15 associated with the tuner display 16. To the third input of the processor device 11 connected to the battery pack 17 is connected to a power source 18 connected to the third input of the processor device 11. To the fourth input of the processor device 11 is connected a crystal oscillator 19.

The device identification of the optical fibers is as follows.

The operation of the transmitting optical module identification device of optical fibers based on the emission of the binary code sequences of pulses from the transmitting findings of the processor unit 1. Binary data recorded in the memory�ü processor unit 1 and stored in the form of an array of numbers. For ease of maintenance and reprogramming of the processor unit 1 in the event of a failure of the program unit software update 2, which is a connector with the ability to connect an external programmer.

In the first place, you used in initialization of the program variables. The second stage is the initialization of ports. During the procedure, the initialization of the timer (not shown) in the registers responsible for the operation of the timer, stores the values of the bits, which corresponds to the operation of the processor device 1 interrupt on match timer (comparator) and some value is written to the register matches (to perform the interruption operation of the processor device 1). The next step is verification regime. If the unit start generator equipment 4 is in an inactive state, the program will not give any information about the operation of the transmitting module to the display unit 3 and again checks. Thus, in this activity, there is a loop that lasts until the unit start generator equipment 4 is locked in the operating mode. When you run the generator unit equipment 4, the processor unit 1 will return to operating mode, the display unit 3 displays the status of� module and starts the timer. After that, the processor unit 1 checks the matching conditions of the register of the timer with the value stored in the register matches. If no match occurred, the program enters a loop and this occurs up until the timer count to the desired value. The coincidence timer value with a certain number command is issued to the interruption of the processor unit 1. During the procedure interrupts the processor unit 1 outputs the values from the table on ports and increases the counter of array elements per unit. The sequence of actions of the processor device 1 does not end. Instead, the transmitter optical module, there is a loop to check the operating mode. Quartz resonator 5, used in generators with fixed frequency (the processor unit 1), provides an update of the software of the processor unit 1 and provides stabilization of the frequency of operation of the transmitting optical module identification device of the optical fibers.

The operation of the transmitting optical module identification device of optical fibers based on using the battery pack 6 with the possibility of the battery charge power source 7, which provides operation of the transmitting optical module directly from �nesnera power source 7 (including 220).

The block of electronic keys 8 carries out switching of electrical signals and generates a code sequence for a block of electro-optical converters 9.

The input optical signal pulses in fiber-optic communication line by means of a block of input optical signals 10.

Work processor unit 11 of the receiving optical module involves recognition of incoming codeword received at the units of the output optical signal 14 and the opto-electronic Converter 13, and code in comparison with the permitted values of pulses stored in the memory of the processor device 11 in the form of a table matching the output of the transmitter - code package" (table). According to various optical fibers are transmitted non-repeating sequence of pulses. For admission to the processor unit 11 to the allowed values for the number of bits of the output of the transmitting optical module is displayed on the display unit 15 with the settings in the tuner display 16. In case of receipt of the receiving optical prohibited module combination is no action on the part of the processor device 11, and this sequence is ignored. Recognition of the incoming code is performed at the processing device 11 in operation interrupt �on an external signal. Upon admission to the receiving optical module of the first information pulse is interrupted and begins reading a digital signal, after which a received signal is compared with permissible values of the signals recorded in the permanent storage device of the processor device 11. In the case of coincidence of the values of the signals read combination is mapped to the pin number of the transmitting optical module, displayed on the display unit 15. For ease of maintenance and reprogramming of the processor device 11 in the event of a failure of the program there is a unit software update 12, which represents a connector with the ability to connect an external programmer.

Completing the cycle of operation of the processor device 11 by the removal of restrictions on the disabling of interrupts (including, if the coincidence signals did not happen) and re-checks the condition of existence of the external interrupt signal. The operation of the receiving optical module identification device of optical fibers based on using the battery pack 17 with the possibility of the battery charge power source 18. Given the possibility of receiving optical module directly from an external power source 18 (including 220). Quartz resonator 19, the prima�aemy generators with fixed frequency (processing unit 11), provides the ability to update the software of the processor device 11 and provides stabilization of the frequency of operation of the receiving optical module identification device of the optical fibers.

An example of a specific implementation of the method

The basis of the identification method of the optical fibers in the construction of fiber-optic communication lines on the classical principle of simplex communication, which is the scheme of the transmitter - line receiver. The principle of simplex communication implies that the transmission and reception of messages between two points is realized separately in one direction only. In General, the transmitting optical module is designed to generate the information signal, converting the received signal into light pulses for further transmission in fiber-optic communication line. On the other side of the fiber-optic link receiver module extracts the signal light from the optical fiber converts the light pulse is an electric pulse through the block optoelectronic Converter 13, detects the transmitted coded pulses, and outputs the corresponding number of the emitting optical fiber on the display unit 15. As the processor unit 1 was used microcontroller ATmega8 company AtmelAVR for manufacturi�tion device 11 - the ATtiny2313 microcontroller.

When the device identification of optical fiber test its performance according to the indication. If successful, the launch of the device will first execute the generation of optical pulses of the transmitting optical module by means of the unit start generator equipment 4, wherein the transmitting optical module is connected to the studied lines. Then in the middle end of the sample line through a block of electro-optical converters 9 in the bundle of optical fibers is injected through the block input optical signal 11 of the optical probe signals, each of which has a non-repeating sequence of optical pulses. In the beam contains, for example, optical fibers 16. As electro-optical converters can be used laser diodes or light emitting diodes, for example TSAL5100. At the far end of the examined line by serial connection of the test optical fiber to the receiving optical module is read from the optical fiber code number signal of the transmitting optical fiber and the results of its processing in the form of matching the output of the transmitter - code word (table) number of the investigated fiber display on the display unit of the receiving optical module. For example,at the far end by a sample of 16 optical fiber testing optical fiber at number 13. In this case, the processor unit 11 processes incoming code combination 00000000000111101101 checks according to the table the output of the transmitter - code word", and the number of the transmitter output displays on the display unit 15 connected to the receiving module (figure 13).

For reliable recognition of the incoming code words code is taken into account the Hamming distance, defined as the minimum number of elements, in which one combination is different from another when it is pairwise comparison. For most of the pulse sequence presented in the table, the code distance is equal to three.

Table
The line output of the transmitter - code word"
The number displayed on the display of the receiverCode word
100000000000011110001
200000000000011101011
300000000000011000111
400000000000010011101
500000000000000010011
6 00000000000010110111
700000000000001101101
800000000000001011111
900000000000110001111
1000000000000111010111
1100000000000111100011
1200000000000110111001
1300000000000111101101
1400000000000100011011
1500000000000100111101
1600000000000101000011

Thus, the claimed invention allows operation at remote ends of the cable segment, as well as improving the performance of the identification process of optical fibers by quickly determining the necessary pairs to splice and due to the simultaneous identification of multiple optical fibers allows to automate the identification process of optical fibers, improving the reliability of the identification of the ends of the optical fibers irrespective of their number, location, and color of marking.

1. The method of identification of the protected area�ical fibers, which end in the middle of the investigated lines in an optical fiber is introduced optical probe signal, and then read it in from the optical fiber at the far end of the conducting line, wherein the first run of generating optical pulses of the transmitting optical module through block start generating device, the transmitting optical module is connected to the studied lines, then in the middle end of the sample line in the bundle of optical fibers is injected through the block of input optical signals of the optical probe signals, each of which has a non-repeating sequence of optical pulses, and at the far end of the examined line by serial connection of the test optical fiber to the receiving optical module is read from the optical fiber code number signal of the transmitting optical fiber and the results of its processing in the form of matching the output of the transmitter is a code word the number of the investigated fiber display on the display unit of the receiving optical module.

2. The device identification of optical fibers, comprising a transmitting optical fiber and the receiving optical module, connected with an optical cable, wherein the coupling optical module contains a processor at�ful, United first input-output unit with the software update and the second output with display unit, the input of which is connected to the block start generating equipment connected to the second input of the processor device, to the third input of which is connected a crystal oscillator, and to a fourth input of the processor unit connected to the battery unit connected with the power source connected to the fourth input of the processor unit, and the third output of the processor device is connected with power electronic switches connected to the unit of electro-optical converters associated with the block of input optical signals, and the receiving optical module contains the processor unit, United first input-output unit with the software update, to a second input of processor devices connected to a block of optical-electronic Converter connected in series with the output unit of the optical signal and the second output processor unit connected to the display unit associated with the tuner display, and to the third input of the processor devices are connected with the battery pack connected to the power source connected to the third input of the processor device, and to a fourth input of the processor�about the device connected to the quartz resonator.



 

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1 dwg

FIELD: measurement equipment.

SUBSTANCE: installation comprises a collimator with a test-object, a monitored item and a measuring unit. The test-object is made as a cross hair and rigidly fixed in the focal plane of the collimator. The monitored item is made as television or thermal imaging one, its radiation detector is set in the focal plane of the lens of the monitored item. A flat mirror able of rotating around the vertical axis is installed between the collimator and the monitored item. The collimator output via the flat mirror is connected to the monitored item lens. The measuring unit comprises a panel for synchronisation and formation of line illumination pulse and two margin pulses, a double-beam oscillograph and a video monitor. The monitored item output is connected to the input of the first channel in the double-beam oscillograph and to the input of the panel for synchronisation and formation of line illumination pulse and two margin pulses, while the first output of the latter is connected to the video monitor input. The second output of the said panel is connected to the input of the second channel in the double-beam oscillograph.

EFFECT: improved reliability of the obtained results, increased information value and monitoring accuracy, possibility to monitor and define test-object parameters in the form of miras with vertical and horizontal lines.

3 dwg

FIELD: physics.

SUBSTANCE: interferometer has a monochromatic light source and series-arranged afocal system for forming an expanded parallel light beam, a plane-parallel beam splitter oriented at an angle to the parallel light beam, a first plane mirror with a reflecting coating facing the plane-parallel beam splitter and configured to change the angle of inclination to the parallel light beam passing through the plane-parallel beam splitter, a second plane mirror configured to change the angle of inclination, and a recording unit placed in the beam of light reflected successively from the first plane mirror and the plane-parallel beam splitter, and having a focusing lens and a photodetector. The second plane mirror is placed between the afocal system and the plane-parallel beam splitter, and its reflecting coating has low transmission and faces the reflecting coating of the first plane mirror.

EFFECT: high accuracy of monitoring focusing and residual wave aberrations of telescopic systems and objective lenses due to interference of light waves passing through the monitored telescopic system or objective lens multiple times.

2 cl, 3 dwg

FIELD: physics, optics.

SUBSTANCE: invention relates to ophthalmology and is aimed at facilitating uniform evaluation of spectacle lenses across the entire binocular field of vision, quantitative evaluation of fusion conditions, which is characteristic of binocular vision, which is enabled due to that an optical system is defined using a coordinate system in which the origin is located at the middle point of the centres of rotation of both eyeballs, and the object is accurately defined by the visual direction from the origin. The reference value of the angle of convergence is calculated using visual axes of visual directions to the object which is located at the intersection of visual axes after passing through structural base points of the spectacle lenses. The angle of convergence is calculated between the visual axes passing through spectacle lenses and continuing to the object point of evaluation in a given visual direction, and aberration of convergence is calculated from the difference between the angle of convergence and the reference value θCH0 of the angle of convergence.

EFFECT: providing uniform evaluation of spectacle lenses across the entire binocular field of vision.

7 cl, 27 dwg

FIELD: physics, optics.

SUBSTANCE: invention relates to ophthalmology and is aimed at making spectacle lenses, use of which reduces discomfort and fatigue, which is provided due to that when designing spectacle lenses, positive relative convergence, negative relative convergence, positive relative accommodation, negative relative accommodation and vertical fusional vergence, which are individual measurement values relating to binocular vision, are determined as relative measurement values; at least one or both of positive relative convergence and negative relative convergence are included in the individual relative measurement value, wherein the method involves determining optical design values for spectacle lenses by optimising binocular vision using as an estimation function for optimisation, a function obtained via summation of binocular visual acuity functions which include relative measurement values as factors in corresponding estimated object points.

EFFECT: making spectacle lenses use of which reduces discomfort and fatigue.

12 cl, 45 dwg

FIELD: measurement equipment.

SUBSTANCE: method is based on generation of an image of calibrated sources of radiation (targets) in the plane of a matrix photodetecting device (MPPD), reproduction of the produced video information in one of television standards and measurement of signals at the outlet of optic-electronic systems (OES). In process of measurements the OES is fixed to a turnstile, and the "OES-turnstile" system is placed into a thermal chamber. The image of the target is moved in the MPPD plane due to inclination of the OES sighting line in the vertical plane and rotation of the "target-collimator" system in the horizontal plane. The number of target strokes is set as sufficiently high (more than 50 strokes). Besides, an additional pair of strokes is added into the target with low spatial frequency. The spatial resolution of OES is determined by comparison of amplitudes of pulses at low and high spatial frequencies.

EFFECT: higher accuracy of control of OES parameters in working range of temperatures.

4 dwg

FIELD: measurement equipment.

SUBSTANCE: target comprises rectangular narrow strokes arranged in parallel in a row Nvch, the width of which bVch is equal to the distance between them and is determined based on the following expression: bVch=F/f0*(m+δ), where: F - focus distance of a collimator; f0 - focus distance of a lens of the optic-electronic system (OES); m - size of a pixel of a matrix photodetecting device (MPDD); δ - a value, which is less than the size of the pixel multiple times and is equal: 0.01*m<δ<0.1*m. The number of narrow strokes Nvch≥is 2m/δ, and their height is h≥F/f0*5m. The target comprises at least one wide stroke arranged on the line of narrow strokes Nvch at its edges, such as NNch along the height equal to the height of narrow strokes Nvch, and along the width BnCh=(5…10)*bVch. The method includes formation of an actual image of the target in the plane of the MPDD, reproduction of a signal from narrow and wide strokes, according to which they perform mutual matching of the MPPD plane, the focal plane of the OES lens and the plane of the actual image of the target. The image from narrow and wide strokes is aligned along the direction of the line of MPPD pixels. They measure characteristics of the signal from narrow and wide strokes and determine the quality of OES tuning and its parameters.

EFFECT: provision of quality tuning of OES with MPPD, determination of its focus distance, its variation with higher accuracy and determination of temperature resolution.

7 cl, 6 dwg

FIELD: optical engineering.

SUBSTANCE: device has receiving optical module placed in series with optic signal delay unit and radiation unit. Axes of receiving optical module and radiation module are aligned. Receiving optical module additionally has mesh with luminous radial lines and transparent diaphragm which is disposed in point of crossing of lines of mesh and mounted in focal plane of first objective. Device also has photoreceiver, measurement data control and registration unit, illuminator, optical unit, fiber-optic divider and fiber-optic adder.

EFFECT: improved precision of monitoring of non-parallelism of axes; widened range of application.

3 cl, 3 dwg

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