Device and method for debugging reverse scanning function of optical system

Abstract

The invention provides a device and a method for debugging a reverse scanning function of an optical system. The optical system reverse scanning function debugging device comprises a base, an electric control rotating platform, a first fixing seat and a second fixing seat. The base is arranged on the detection platform. The electric control rotating platform is arranged on the base. In the first direction, the first fixing base is connected with the side, away from the base, of the electric control rotating platform, and the central axis of the first fixing base and the rotating axis of the electric control rotating platform are collinear. In the first direction, the second fixing base is arranged on the side, away from the electric control rotating platform, of the first fixing base, and the second fixing base is eccentrically arranged on the first fixing base. Wherein the second fixing seat and the first fixing seat are respectively provided with a mounting part, and the mounting parts are used for being detachably connected with the tested optical single machine, so that the tested optical single machine is connected with one of the second fixing seat and the first fixing seat.

Description

Technical Field

[0001] The present application relates to the field of debugging of search imaging functions of optical systems, and more specifically, to a device for debugging the backscanning function of an optical stand-alone with a scanning galvanometer, which is suitable for debugging the backscanning function of various optical stand-alones / systems. Background Art

[0002] In response to the development trend of opening low-altitude airspace at home and abroad and the demand for drone countermeasures, more and more photoelectric detection systems are equipped with search imaging technology. The photoelectric detection system rotates at a set speed and repeatedly scans the target area. The imaging detector obtains a panoramic image of the target area through scanning imaging, image stitching, processing and compensation. In order to obtain a clear and stable panoramic image effect, the turntable must have a high-precision rotation speed when the load changes or the torque is disturbed, so that the scene imaged by the detector remains unchanged during the detector integration time, completing the staring imaging of the current field of view.

[0003] The optical stand-alone backscanning function can usually be debugged after the optical system platform provides power, communication and image processing support during system integration. Upstream suppliers go back and forth to the optical system integration manufacturer to debug the optical stand-alone backscanning function they supply. This method not only requires frequent personnel communication and back and forth, which is inefficient, but also has problems such as inconsistent debugging quality. Repeated assembly and disassembly of optical stand-als can easily produce foreign matter such as thread glue powder, which enters the optical system and affects the imaging quality. In order to meet the requirements of mass production that integrates quality and efficiency, the present invention provides a set of universal, high-precision backscanning function debugging devices, which are delivered to upstream optical stand-alone suppliers, and delivered to host manufacturers after the optical stand-alone backscanning function performance debugging is completed. Summary of the invention

[0004] The present application provides an optical system backscan function debugging device and method, which can effectively complete the performance debugging of the optical single-machine backscan function.

[0005] To achieve the above objectives, this application provides the following technical solutions:

[0006] In the first aspect, the present application provides an optical system backscan function debugging device, which includes a base, an electrically controlled rotating platform, a first fixed seat and a second fixed seat. The base is configured to be arranged on the detection platform. The electrically controlled rotating platform is arranged on the base. Along the first direction, the first fixed seat is connected to the side of the electrically controlled rotating platform away from the base, and the central axis of the first fixed seat is arranged colinearly with the rotation axis of the electrically controlled rotating platform. Along the first direction, the second fixed seat is arranged on the side of the first fixed seat away from the electrically controlled rotating platform, and the second fixed seat is eccentrically arranged on the first fixed seat. Among them, the second fixed seat and the first fixed seat are respectively provided with a mounting portion, and the mounting portion is used to be detachably connected to the optical stand-alone under test, so that the optical stand-alone under test is connected to one of the second fixed seat and the first fixed seat.

[0007] In the above scheme, the optical system backscan function debugging device is used to test the performance of the backscan function of the optical stand-alone. The optical stand-alone under test is installed on the second fixing seat through the installation part, and the second fixing seat is eccentrically arranged on the first fixing seat to make eccentric rotational motion under the drive of the electric control rotating platform. The optical stand-alone under test works and outputs the video to the video display. The speed of the electric control rotating platform and the backscan function parameters of the optical stand-alone under test are set by the debugging computer, and the clarity of the picture displayed by the video display is combined to determine whether it meets the requirements of the backscan function, thereby achieving the purpose of efficient backscan function debugging.

[0008] According to some embodiments of the present application, the first fixing seat is a straight plate structure, and the second fixing seat is protruded from the first fixing seat along the first direction; the mounting portion includes a threaded hole and a screw corresponding to the threaded hole, and the optical stand-alone unit under test is fixed to the second fixing seat or the first fixing seat by means of screws.

[0009] According to some embodiments of the present application, the optical system backscan function debugging device also includes a third fixing plate, which is arranged on one side of the first fixing plate, and in the second direction, the third fixing plate is arranged adjacent to the second fixing plate, and the first direction and the second direction are perpendicular to each other. A communication module is arranged on the third fixing plate, and the communication module is configured with a power supply socket of the tested optical unit, a communication socket of the tested optical unit, and a video output socket of the tested optical unit. The power supply socket of the tested optical unit is used to supply power to the tested optical unit, the communication socket of the tested optical unit is used to communicatively couple the tested optical unit with the communication module, and the video output socket of the tested optical unit is used to connect to the tested optical unit to transmit the output video of the tested optical unit to the video display.

[0010] In the above scheme, before debugging the backscan function, the optical unit under test is first installed on the second fixed seat, the power supply of the optical unit under test is connected to the power supply socket of the optical unit under test, the communication of the optical unit under test is connected to the communication socket of the optical unit under test, and the video output of the optical unit under test is connected to the video output socket of the optical unit under test.

[0011] According to some embodiments of the present application, the base is provided with a power supply\communication input socket and a video output socket, the power supply\communication input socket and the video output socket are connected to the communication module, and the power supply\communication input socket is electrically connected to the electric-controlled rotating platform through the communication module.

[0012] In the above scheme, the power supply of the debugging device and the serial port of the debugging computer are connected to the power supply\communication input socket to supply power to the electrically controlled rotating platform and to debug the rotation speed of the electrically controlled rotating platform. The video display is connected to the video output socket to receive the video image transmitted by the video output socket of the optical stand-alone test unit.

[0013] According to some embodiments of the present application, a power module is provided on the side of the base, and the power module is connected to the power\communication input socket to supply power to the communication module and the electrically-controlled rotating platform.

[0014] According to some embodiments of the present application, an image processing module is provided on the third fixed plate, and the image processing module is electrically connected to the communication module. The image processing module is used to receive the video information output by the tested optical unit and generate a video image to be transmitted to the video display through the video output socket of the tested optical unit.

[0015] According to some embodiments of the present application, the optical system backscan function debugging device also includes a gyroscope, which is used to sense the rotation speed of the electrically controlled rotating platform and generate rotation speed information, and the gyroscope is electrically connected to the optical unit under test to transmit the rotation speed information to the optical unit under test.

[0016] According to some embodiments of the present application, the first fixing seat is provided with a gyro bracket, and the gyro is arranged on the gyro bracket.

[0017] According to some embodiments of the present application, along the first direction, a pitch surface is formed on a side of the second fixing seat away from the first fixing seat, the angle between the pitch surface and the horizontal plane ranges from 0 to 90 degrees, and the mounting portion is arranged on the pitch surface.

[0018] In a second aspect, some embodiments of the present application further provide a method for debugging a backscan function of an optical system, characterized in that the method is applied to the optical system backscan function debugging device of the first aspect, and comprises the following steps:

[0019] Select a second fixing seat, and fix the selected second fixing seat on the first fixing seat;

[0020] Provide a single optical machine to be tested, and install the optical motor to be tested on a second fixing seat through a mounting portion;

[0021] Debugging parameters: Debugging the computer to set the speed of the electric-controlled rotating platform and the backscan function parameters of the tested optical unit, and the electric-controlled rotating platform and the tested optical unit work;

[0022] Stare at the video display, which shows the video image output by the tested optical unit. Based on the collimator crosshair effect on the video display, determine the compliance of the backscan function. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 This is a front view of a device for debugging a reverse scanning function of an optical system in some embodiments of the present application;

[0025] Figure 2 A top view of a device for debugging a reverse scanning function of an optical system in some embodiments of the present application;

[0026] Figure 3 This is an electrical schematic diagram of a device for debugging the reverse scanning function of an optical system in some embodiments of the present application.

[0027] Icon: 1-first fixed seat, 2-electrically controlled rotating platform, 3-power module, 4-base, 5-drive unit, 6-conductive slip ring, 7-gyroscope, 8-gyroscope bracket, 9-second fixed seat, 10-power supply\communication input socket, 11-video output socket, 12-communication module, 13-test optical stand-alone power supply socket, 14-test optical stand-alone communication socket, 15-test optical stand-alone video output socket, 16-image processing unit. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0031] In the description of the embodiments of the present application, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the products of the application are conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0032] In the description of the embodiments of the present application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0033] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application may be combined with each other.

[0034] See also Figure 1 and Figure 2 , Figure 1 This is a front view of the optical system backscan function debugging device in some embodiments of the present application. Figure 2 This is a top view of a device for debugging the reverse scanning function of an optical system in some embodiments of the present application.

[0035] The optical system backscan function debugging device comprises a base 4, an electrically controlled rotating platform 2, a first fixed seat 1 and a second fixed seat 9. The base 4 is configured to be arranged on the detection platform. The electrically controlled rotating platform 2 is arranged on the base 4. Along the first direction, the first fixed seat 1 is connected to the side of the electrically controlled rotating platform 2 that is away from the base 4, and the central axis of the first fixed seat 1 is arranged colinearly with the rotation axis of the electrically controlled rotating platform 2. Along the first direction, the second fixed seat 9 is arranged on the side of the first fixed seat 1 that is away from the electrically controlled rotating platform 2, and the second fixed seat 9 is eccentrically arranged on the first fixed seat 1.

[0036] The second fixing seat 9 and the first fixing seat 1 are respectively provided with a mounting portion, and the mounting portion is used to be detachably connected to the optical unit under test, so that the optical unit under test is connected to one of the second fixing seat 9 and the first fixing seat 1.

[0037] In some embodiments, the optical stand-alone device under test can be selectively connected to the second fixing seat 9 and the first fixing seat 1 to achieve debugging of the reverse scanning function that cannot be turned.

[0038] In the above scheme, the optical system backscan function debugging device is used to test the performance of the backscan function of the optical stand-alone. The optical stand-alone under test is installed on the second fixing seat 9 through the installation part, and the second fixing seat 9 is eccentrically arranged on the first fixing seat 1 to make eccentric rotational motion under the drive of the electric control rotating platform 2. The optical stand-alone under test works and outputs the video to the video display. The speed of the electric control rotating platform 2 and the backscan function parameters of the optical stand-alone under test are set by the debugging computer, and the clarity of the picture displayed by the video display is combined to determine whether it meets the requirements of the backscan function, thereby achieving the purpose of efficient backscan function debugging.

[0039] According to some embodiments of the present application, the first fixing seat 1 is a straight plate structure, and the second fixing seat 9 is protruded from the first fixing seat 1 along the first direction; the mounting portion includes a threaded hole and a screw corresponding to the threaded hole, and the optical stand-alone unit under test is fixed to the second fixing seat 9 or the first fixing seat 1 by means of screws.

[0040] According to some embodiments of the present application, the optical system backscan function debugging device further includes a third fixing plate, which is disposed on one side of the first fixing plate, and in the second direction, the third fixing plate is disposed adjacent to the second fixing plate, and the first direction and the second direction are perpendicular to each other. A communication module 12 is disposed on the third fixing plate, and the communication module 12 is configured with a power supply socket 13 of the optical stand-alone unit under test, a communication socket 14 of the optical stand-alone unit under test, and a video output socket 15 of the optical stand-alone unit under test. The power supply socket 13 of the optical stand-alone unit under test is used to supply power to the optical stand-alone unit under test, the communication socket 14 of the optical stand-alone unit under test is used to communicatively couple the optical stand-alone unit under test with the communication module 12, and the video output socket 15 of the optical stand-alone unit under test is used to connect to the optical stand-alone unit under test to transmit the output video of the optical stand-alone unit under test to the video display.

[0041] In the above scheme, before debugging the backscan function, the optical unit under test is first installed on the second fixed seat 9, the power supply of the optical unit under test is connected to the power supply socket 13 of the optical unit under test, the communication of the optical unit under test is connected to the communication socket 14 of the optical unit under test, and the video output of the optical unit under test is connected to the video output socket 15 of the optical unit under test.

[0042] According to some embodiments of the present application, the base 4 is provided with a power supply\communication input socket 10 and a video output socket 11, the power supply\communication input socket 10 and the video output socket 11 are connected to the communication module 12, and the power supply\communication input socket 10 is electrically connected to the electric-controlled rotating platform 2 through the communication module 12.

[0043] In the above scheme, the power supply of the debugging device and the serial port of the debugging computer are connected to the power supply\communication input socket 10 to supply power to the electrically-controlled rotating platform 2 and to debug the rotation speed of the electrically-controlled rotating platform 2. The video display is connected to the video output socket 11 to receive the video image transmitted by the optical stand-alone video output socket 15 of the test subject.

[0044] According to some embodiments of the present application, a power module 3 is provided on the side of the base 4, and the power module 3 is connected to the power\communication input socket 10 to supply power to the communication module 12 and the electrically-controlled rotating platform 2.

[0045] According to some embodiments of the present application, an image processing module is provided on the third fixed plate, and the image processing module is electrically connected to the communication module 12. The image processing module is used to receive the video information output by the tested optical unit and generate a video image to be transmitted to the video display through the video output socket 15 of the tested optical unit.

[0046] According to some embodiments of the present application, the optical system backscan function debugging device also includes a gyroscope 7, which is used to sense the rotation speed of the electrically controlled rotating platform 2 and generate rotation speed information, and the gyroscope 7 is electrically connected to the optical unit under test to transmit the rotation speed information to the optical unit under test.

[0047] According to some embodiments of the present application, the first fixing seat 1 is provided with a gyro bracket 8 , and the gyro 7 is arranged on the gyro bracket 8 .

[0048] According to some embodiments of the present application, along the first direction, a pitch surface is formed on a side of the second fixing seat 9 away from the first fixing seat 1 , the angle between the pitch surface and the horizontal plane is in a range of 0 to 90°, and the mounting portion is arranged on the pitch surface.

[0049] In some embodiments, the second fixing seat 9 has various specifications, and the pitch angle of the second fixing seat 9 of each specification is different. For example, the pitch angle of some specifications is 30°, and that of others is 60°.

[0050] In a second aspect, some embodiments of the present application further provide a method for debugging a backscan function of an optical system, characterized in that the method is applied to the optical system backscan function debugging device of the first aspect, and comprises the following steps:

[0051] Provide a single optical machine to be tested, and install the optical motor to be tested on the first fixing seat 1 or the second fixing seat 9 through a mounting portion;

[0052] Debugging parameters: the debugging computer sets the rotation speed of the electric-controlled rotating platform 2 and the backscan function parameters of the tested optical unit, and the electric-controlled rotating platform 2 and the tested optical unit work;

[0053] Stare at the video display, which shows the video image output by the tested optical unit. Based on the collimator crosshair effect on the video display, determine the compliance of the backscan function.

[0054] Specifically, the present application provides a device for debugging the reverse scanning function of an optical system, see Figure 1-Figure 3 , Figure 3 This is an electrical schematic diagram of an optical system backscan function debugging device in some embodiments of the present application. Figure 3 The "tested single machine" here refers to the "tested optical single machine".

[0055] The optical system backscan function debugging device comprises a base 4, an electrically controlled rotating platform 2, a first fixing seat 1, a second fixing seat 9 and a third fixing seat.

[0056] The bottom of the base 4 is reserved with 4-8 through holes, which can be installed and fixed on different detection platforms. The first fixing seat 1 can be fixed on the electric control rotating platform 2 by screws. The electric control rotating platform 2 is driven by a servo motor. A conductive slip ring 6 is arranged on the electric control rotating platform 2. A gyroscope 7 is arranged at the rotor end of the conductive slip ring 6. The gyroscope 7 is fixed by a gyroscope bracket 8, and the gyroscope bracket 8 is fixed on the base 4. The gyroscope 7 can detect the current rotation speed of the electric control rotating platform 2 through the conductive slip ring 6.

[0057] The electrically controlled rotating platform 2 can be fixed on the base 4 by screws, and the base 4 is fixed with a power module 3, a drive unit 5 (servo motor), a power supply / communication input socket 10 and a video output socket 11 by screws.

[0058] The communication module 12 and the image processing unit 16 are fixed on the third fixing seat by screws, and the tested optical stand-alone power supply socket 13, the tested optical stand-alone communication socket 14 and the tested optical stand-alone video output socket 15 can be fixed on the communication module 12 by screws.

[0059] By changing the second fixing seat 9 of different specifications, the pitch plane of different angles can be selected, thereby changing different debugging pitch angles. Before changing, the second fixing seat 9 can be fixed on the first fixing seat 1 by screws, and then the optical stand-alone unit to be tested can be fixed on the second fixing seat 9 by screws.

[0060] Before debugging the backscan function, the optical stand-alone unit under test is fixed on the first fixing seat 1 or the second fixing seat 9 .

[0061] Taking the first fixing seat 1 as an example, the power supply of the tested optical stand is connected to the tested optical stand power socket 13, the communication of the tested optical stand is connected to the tested optical stand communication socket 14, and the video output of the tested optical stand is connected to the tested optical stand video output socket 15. The debugging device power supply (power module 3) and the debugging computer serial port are connected to the power supply\communication input socket 10, and the video display is connected to the video output socket 11.

[0062] Place two collimators at a 90° angle to simulate distant targets at a distance of 1 meter from the backscan function debugging device. Adjust the height of the collimators so that the crosshairs of the two collimators can be imaged in the center of the field of view. The clarity of the crosshairs in the center of the field of view can be used to determine the debugging effect of the optical stand-alone backscan function.

[0063] The speed of the electric-controlled rotating platform 2 and the backscan function parameters of the tested optical unit are set by debugging the computer, and then the power supply is turned on, and the backscan function debugging device and the tested optical unit start working. The gyroscope 7 transmits the speed of the electric-controlled rotating platform 2 sensed to the tested optical unit, and the debugging personnel stare at the collimator crosshair effect displayed on the video display to determine the compliance of the backscan function. If the image is clear, it means that the backscan function is normal. Otherwise, reduce the speed of the electric-controlled rotating platform 2 or modify the parameters of the fast mirror of the tested optical unit to meet the needs of the backscan function.

[0064] After the tested optical unit completes the backsweep function debugging in one direction, it is removed, and then the second fixing seat 9 is fixed on the first fixing seat 1, and the tested optical unit is installed. According to the above steps, the backsweep function debugging work in another direction can be completed.

[0065] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An optical system backscan function debugging device, characterized in that: include: A base is configured and arranged on the detection platform; An electrically controlled rotating platform is arranged on the base; A first fixing seat, connected to a side of the electrically controlled rotating platform away from the base along a first direction, and a central axis of the first fixing seat is collinearly arranged with a rotating axis of the electrically controlled rotating platform; A second fixing seat, along the first direction, the second fixing seat is arranged on a side of the first fixing seat away from the electrically controlled rotating platform, and the second fixing seat is eccentrically arranged on the first fixing seat; The second fixing seat and the first fixing seat are respectively provided with a mounting portion, and the mounting portion is used to be detachably connected to the optical unit under test, so that the optical unit under test is connected to one of the second fixing seat and the first fixing seat.

2. The optical system backscan function debugging device according to claim 1, characterized in that: The first fixing seat is a straight plate structure, and the second fixing seat is protruded from the first fixing seat along the first direction; the mounting portion includes a threaded hole and a screw corresponding to the threaded hole, and the optical stand-alone unit under test is fixed to the second fixing seat or the first fixing seat through the screw.

3. The optical system backscan function debugging device according to claim 1, characterized in that: The optical system backscan function debugging device also includes a third fixing plate, which is arranged on one side of the first fixing plate, and in the second direction, the third fixing plate is arranged adjacent to the second fixing plate, and the first direction and the second direction are perpendicular to each other; A communication module is arranged on the third fixed plate, and the communication module is equipped with a power supply socket of the tested optical unit, a communication socket of the tested optical unit and a video output socket of the tested optical unit. The power supply socket of the tested optical unit is used to supply power to the tested optical unit, the communication socket of the tested optical unit is used to communicatively couple the tested optical unit with the communication module, and the video output socket of the tested optical unit is used to connect with the tested optical unit so as to transmit the output video of the tested optical unit to a video display.

4. The optical system backscan function debugging device according to claim 3, characterized in that: The base is provided with a power supply\communication input socket and a video output socket, the power supply\communication input socket and the video output socket are connected to the communication module, and the power supply\communication input socket is electrically connected to the electric-controlled rotating platform through the communication module.

5. The optical system backscan function debugging device according to claim 4, characterized in that: A power module is arranged on the side of the base, and the power module is connected to the power\communication input socket to supply power to the communication module and the electrically controlled rotating platform.

6. The optical system backscan function debugging device according to claim 4, characterized in that: An image processing module is provided on the third fixed plate, and the image processing module is electrically connected to the communication module. The image processing module is used for receiving the video information output by the tested optical stand-alone device and generating a video image, so as to transmit the video image to the video display through the video output socket of the tested optical stand-alone device.

7. The optical system backscan function debugging device according to claim 4, characterized in that: The optical system backscan function debugging device also includes a gyroscope, which is used to sense the rotation speed of the electrically controlled rotating platform and generate rotation speed information, and the gyroscope is electrically connected to the tested optical unit to transmit the rotation speed information to the tested optical unit.

8. The optical system backscan function debugging device according to claim 7, characterized in that: The first fixing seat is provided with a gyro bracket, and the gyro is arranged on the gyro bracket.

9. The optical system backscan function debugging device according to any one of claims 1 to 8, characterized in that: Along the first direction, a pitch surface is formed on a side of the second fixing seat away from the first fixing seat, the angle between the pitch surface and the horizontal plane is in a range of 0 to 90 degrees, and the mounting portion is arranged on the pitch surface.

10. A method for debugging the reverse scanning function of an optical system, characterized in that: Applicable to the optical system backscan function debugging device according to claim 1, the method comprises the following steps: Providing a single optical motor to be tested, and installing the optical motor to be tested on the first fixing seat or the second fixing seat through a mounting portion; Debugging parameters, the debugging computer sets the rotation speed of the electrically controlled rotating platform and the backscan function parameters of the optical stand-alone device under test, and the electrically controlled rotating platform and the optical stand-alone device under test work; Stare at a video display that displays the video image output by the tested optical stand-alone device, and determine the compliance of the backscan function based on the collimator crosshair effect on the video display.

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