CN109781392B - Large-view-field optical system detection device and detection method - Google Patents
Large-view-field optical system detection device and detection method Download PDFInfo
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Abstract
The invention provides a large-view-field optical system detection device and a detection method, which solve the problems that the existing detection device can only detect the imaging quality of the central view field of an optical system, and has a limited detection range and low accuracy. The detection device comprises an arc guide rail, an auto-collimation collimator and at least one collimator; the self-collimation collimator is arranged at the outer side of the circular arc guide rail, and a first two-dimensional adjusting table is arranged at the bottom of the self-collimation collimator; the at least one collimator is arranged on the arc guide rail in a sliding way through a second two-dimensional adjusting table, so that the view field range can be adjusted according to the requirement, and the detection of the large view field range can be performed; the optical axes of the parallel light beams emitted by the auto-collimation collimator and the at least one collimator are positioned on the same horizontal plane and intersect at the center of the circular arc guide rail. The detection device is used for detecting the imaging quality of the large field of view of the optical system, and is simple to operate and high in detection precision.
Description
Technical Field
The invention belongs to the optical system detection technology, and relates to a large-view-field optical system detection device and a detection method.
Background
With the increasing expansion of optical system applications, there is an increasing need for testing and evaluating the performance of optical systems, especially infrared optical systems. The field of view of the optical system can influence the action distance and the precision of the system, and the large-field optical system can acquire more information, so that the use efficiency is improved, and the optical system is one of the development directions of the current optical system; with the development of the current infrared focal plane technology, the size of the linear array or the area array infrared focal plane device is larger and larger, so that the infrared optical system with a large field of view is also urgently needed to be matched with the infrared optical system.
Because of certain special application environments, the imaging quality in the whole field of view is required to meet certain requirements, the imaging quality of each field of view needs to be detected, and along with the development of a large-field optical system, the detection technology also needs to be adapted to the large-field optical system.
The collimator is effective equipment for detecting various performance indexes of most of the current optical systems, the collimator is aligned to the optical system to be detected, so that the collimator is consistent with the optical axis of the optical system to be detected, various indexes of the optical system to be detected are evaluated by observing the imaging change of a standard graph passing through the optical system to be detected, the output image of the optical system is generally acquired by a computer control and image acquisition analysis system of the optical system to be detected, and the various performance indexes of the optical system to be detected are evaluated by analysis and calculation. However, this method is limited to detecting the central field of view of the optical system, and the detection result of the central field of view can only represent the result in the extremely small adjacent central view field area, and the detection range is limited and cannot represent the result in the large field of view.
Disclosure of Invention
The invention aims to solve the defects that the existing detection device can only detect the imaging quality of the central view field of an optical system and the detection range is limited, and provides the large view field optical system detection device and the detection method, so that the detection of the imaging quality of the large view field is realized, and the detection accuracy is improved.
In order to achieve the above purpose, the technical solution provided by the present invention is:
the large-view-field optical system detection device is characterized by comprising an arc guide rail, an auto-collimation collimator and at least one collimator; the self-collimation collimator is arranged at the outer side of the circular arc guide rail, and a first two-dimensional adjusting table is arranged at the bottom of the self-collimation collimator; the at least one collimator is arranged on the arc guide rail in a sliding way through a second two-dimensional adjusting table; the optical axes of the parallel light beams emitted by the auto-collimation collimator and the at least one collimator are positioned on the same horizontal plane and intersect at the center of the circular arc guide rail.
Further, in order to detect the central view field and the large view field of the optical system to be detected at the same time, the number of the collimator tubes is two; the self-collimation collimator is positioned at the outer side of the middle part of the circular arc guide rail; the two collimator tubes are respectively positioned at two sides of the auto-collimation collimator tube.
Further, an adjustable base is arranged at the bottom of the first two-dimensional adjusting table, so that the height of the auto-collimation collimator can be finely adjusted to be consistent with the heights of other collimator; the bottom surface of the second two-dimensional adjusting table is provided with a sliding block matched with the arc guide rail, the sliding block has a locking function, slides in the guide rail, can lock after sliding to a required position, and fixes the position of the view field of the collimator.
Further, the arc guide rail is fixedly arranged on the guide rail fixing seat through a screw;
the guide rail fixing seat is provided with a graduated scale concentric with the circular arc guide rail, and the bottom of the second two-dimensional adjusting table is provided with a pointer matched with the graduated scale.
Further, the central angle of the circular arc guide rail is 120 degrees; the radius of the arc guide rail is 1000mm; the included angle between the two parallel light pipes can be at least adjusted within the range of 15-100 degrees. Of course, the radius of the arc guide rail, the central angle and the range of the included angle between the parallel light pipes can be changed and adjusted according to the measurement requirement so as to match with different view field sizes and parallel light pipe sizes.
Further, the auto-collimation collimator comprises an auto-collimation switching component and a parallel collimator, and the auto-collimation switching component can switch between an auto-collimation function and a detection function according to requirements; the collimator adopts an off-axis reflection collimator and comprises a light source, a target, a first refractive reflector, a second refractive reflector and an off-axis parabolic reflector; light emitted by the light source is transmitted through the target, is reflected to the off-axis parabolic reflector through the first turning reflector and the second turning reflector in turn, and finally is reflected by the off-axis parabolic reflector and horizontally emits parallel light beams; the target is located on a focal plane of the off-axis parabolic mirror; the first turning mirror and the second turning mirror are positioned on the reflecting light path of the off-axis parabolic mirror;
the auto-collimation switching component comprises a CCD camera and a spectroscope; the spectroscope is arranged between the target and the first turning reflecting mirror; when the collimator is in an auto-collimation function, a standard reflector is additionally arranged at a light outlet of the collimator, light reflected by the standard reflector is divided into two parts by a spectroscope, one part of the light is transmitted and the other part of the light is reflected to a CCD camera, and the CCD camera is positioned on a conjugate focal plane of the off-axis parabolic reflector.
Further, the targets adopt star targets, starfish targets or cross silk targets, and different target patterns can be selected according to requirements; the light source adopts a halogen lamp, light emitted by a halogen filament is used as a visible light source, infrared light generated after a bulb is heated is used as an infrared light source, the light source projects to a target, the target is illuminated to form a simulated infinity target, because the light source contains visible light and infrared light wave band simultaneously, therefore the device can detect visible optical system also can detect infrared optical system.
Further, the auto-collimation collimator and the collimator are both rotated by 90 degrees and placed, so that the light path spreads along the vertical direction; facilitating detection of a smaller field of view by the detection device.
Meanwhile, the invention also provides a detection method of the large-view-field optical system, which is characterized by comprising the following steps:
step 1) constructing a large-view-field optical system detection device
The large-view-field optical system detection device comprises an arc guide rail, an auto-collimation collimator and at least one collimator; the self-collimation collimator is arranged at the outer side of the circular arc guide rail, and a first two-dimensional adjusting table is arranged at the bottom of the self-collimation collimator; the at least one collimator is arranged on the arc guide rail in a sliding way through a second two-dimensional adjusting table; the optical axes of the parallel light beams emitted by the auto-collimation collimator and the at least one collimator are positioned on the same horizontal plane and intersect at the center of the circular arc guide rail;
step 2) calibration
Calibrating the detection device constructed in the step 1) by using a theodolite according to measurement requirements;
step 3) detection
And (3) placing the optical system to be measured at the intersection of the autocollimation collimator and the emergent beam of the collimator (namely, at the circle center of the circular arc guide rail), and respectively measuring the imaging quality of the optical system to be measured at different view fields.
Further, the number of collimator tubes in the large-view-field optical system detection device built in the step 1) is two; the self-collimation collimator is positioned at the outer side of the middle part of the circular arc guide rail; the two collimator tubes are respectively positioned at two sides of the auto-collimation collimator tube;
the bottom of the first two-dimensional adjusting table is provided with an adjustable base; the bottom surface of the second two-dimensional adjusting table is provided with a sliding block matched with the circular arc guide rail;
the circular arc guide rail is arranged on the guide rail fixing seat; a graduated scale concentric with the circular arc guide rail is arranged on the guide rail fixing seat, and a pointer matched with the graduated scale is arranged at the bottom of the second two-dimensional adjusting table;
the specific steps of the step 2) are as follows:
2.1 Placing the theodolite at the center of the circular arc guide rail of the detection device, and adjusting the theodolite by taking the auto-collimation collimator as a reference to enable the theodolite to be coaxial with the auto-collimation collimator, namely, the optical axis is consistent;
2.2 According to the measurement requirement, combining a graduated scale and a pointer, and moving the positions of the two collimator tubes on the arc guide rail;
2.3 Sequentially aligning the theodolite with two collimator tubes, and adjusting a second two-dimensional adjusting table below the collimator tubes to enable the collimator tubes to be coaxial with the theodolite;
2.4 A theodolite is removed.
Further, the specific steps of the step 3) are as follows:
3.1 Placing the optical system to be tested at the intersection of the autocollimation collimator and the emergent beam of the collimator;
3.2 Switching the auto-collimation collimator to an auto-collimation function state (namely inserting a spectroscope of the auto-collimation switching component between a target of the collimator and a first turning reflector, and additionally arranging a standard reflector at a light outlet of the collimator), and adjusting an optical system to be tested to be coaxial with the auto-collimation collimator;
3.3 Taking out the auto-collimation switching component in the auto-collimation collimator to switch the auto-collimation collimator into a detection state;
3.4 The imaging quality of the central view field and the large view field is measured sequentially through the computer control and image acquisition analysis system of the optical system to be measured.
In the process of assembling and adjusting the optical system to be tested, the imaging quality of each view field of the system is detected by using the invention, and the detection result can guide the assembling and adjusting process in real time, so that the best assembling effect is achieved, and the detection and assembling and adjusting auxiliary guidance of the large-view-field optical system is completed.
The invention has the advantages that:
the invention detects the large-view-field optical system by utilizing the mutual matching of the plurality of collimator tubes, has simple structure, adopts the arc guide rail to move the collimator tubes to different view-field positions of the optical system to be detected, accurately adjusts the azimuth pitching position of the collimator tubes through the two-dimensional adjusting table, realizes the detection of the imaging quality of the large view field or even the full view field of the optical system to be detected, and has simple operation and high detection precision.
Meanwhile, the device can assist in the assembly and adjustment work of the large-view-field optical system, in the actual development process, errors caused by assembly and adjustment are large, and in the process of debugging the large-view-field optical system, each view field is monitored by using the detection device, and the assembly and adjustment process can be guided in real time according to the monitoring result, so that the optimal assembly effect is achieved.
Therefore, the detection device can simultaneously complete the detection of the imaging quality of the optical system in different view fields and the adjustment work of the system under different view fields, and provides an effective device and method for the detection and adjustment of the imaging quality of the large-view-field optical system.
Drawings
FIG. 1 is a front view of a detection device of the present invention;
FIG. 2 is a top view of the detection device of the present invention;
FIG. 3 is a schematic view of an optical system of a collimator according to the present invention;
FIG. 4 is a schematic view of an optical system of an auto-collimation collimator of the present invention;
FIG. 5 is a schematic diagram of the position of an infrared optical system under test;
FIG. 6 is a schematic view of the minimum field of view of the inspection apparatus of the present invention with the collimator horizontally disposed;
FIG. 7 is a schematic view of the minimum field of view of the inspection apparatus of the present invention with the collimator in a vertical position.
1-auto-collimation collimator; 2-collimator; 3-a first two-dimensional adjustment stage; 4-a second two-dimensional adjustment stage; 5-arc guide rails; 6-a graduated scale; 7, a guide rail fixing seat; 8-an adjustable base; 9-pointer; 10-an optical system to be measured; 11-off-axis parabolic mirrors; 12-a second turning mirror; 13-a first turning mirror; 14-an auto-collimation switching component; 141-CCD camera; 142-spectroscope; 15-standard mirror; 16-target; 17-light source.
Detailed Description
The invention is described in further detail below with reference to the attached drawings and specific examples:
as shown in fig. 1 to 7, a large-view-field optical system detection device includes a circular arc guide rail 5, an auto-collimation collimator 1, and two collimator tubes 2.
The arc guide rail 5 is fixed on the guide rail fixing seat 7 through a screw, the radius of the arc guide rail is 1000mm, and the central angle is 120 degrees.
The auto-collimation collimator 1 comprises an auto-collimation switching component 14 and a parallel light pipe 2, can realize the switching between the auto-collimation function and the parallel light pipe 2 detection function, and can realize the auto-collimation function by mechanically positioning and switching at the same position in the light path of the parallel light pipe 2 when different functions are used and adding a standard reflector 15 at the light outlet of the parallel light pipe 2. The self-collimation collimator 1 is arranged on the outer side of the middle part of the circular arc guide rail 5, the bottom of the self-collimation collimator is provided with a first two-dimensional adjusting table 3, and the first two-dimensional adjusting table 3 is arranged on the adjustable base 8 through a screw; the two-dimensional adjusting table is used for adjusting the azimuth and the pitching of the auto-collimation collimator 1, and the adjustable base 8 is used for adjusting the central height of the auto-collimation collimator 1 so as to ensure that the central height of the auto-collimation collimator 1 is consistent with the height of the two collimator 2.
In addition, two collimator tubes 2 are distributed on two sides of the auto-collimation collimator tube 1 and are respectively arranged on the arc guide rail 5 through a second two-dimensional adjusting table 4; the bottom of the second two-dimensional adjusting platform is provided with a sliding block matched with the circular arc guide rail 5, the sliding block has a locking function, can slide along the circular arc guide rail 5, and can also fix the view field position of the collimator 2 so as to adjust the size of the detection view field according to the requirement, and the included angle between the two collimator 2 ranges from 15 degrees to 100 degrees.
Be provided with on the guide rail fixing base 7 with the scale 6 of circular arc guide rail 5 concentricity, bear the weight of two second two-dimensional adjustment platform bottoms of collimator 2 and all be provided with pointer 9, this scale 6 cooperates with pointer 9, the staff of being convenient for removes second two-dimensional adjustment platform to required visual field measurement position, satisfies the detection demand.
The collimator 2 adopts off-axis reflective collimator 2, which comprises a light source 17, a target 16, a first refractive reflector 13, a second refractive reflector 12 and an off-axis parabolic reflector 11. The light source 17 irradiates the target 16 to form a simulated luminous pattern, the simulated luminous pattern is sequentially deflected and reflected onto the off-axis parabolic reflector 11 through the first deflecting reflector 13 and the second deflecting reflector 12, and finally, parallel light beams are horizontally emitted after being reflected by the off-axis parabolic reflector 11 to form an infinite target. The light path of the collimator 2 is generally spread along the horizontal direction, the width of the whole collimator 2 is larger, which is approximately 2 times the height of the whole collimator 2, so that the space occupied in the horizontal direction is larger, if the collimator is placed on the circular arc guide rail 5 so as not to shield the light passing of the middle collimator 2, the minimum included angle of the two side light pipes is larger (as shown in fig. 6), so that the minimum field of view which can be detected is larger, therefore, in order to have the minimum field of view which can be detected on the circular arc guide rail 5 with the same radius smaller, each collimator is rotated by 90 degrees (i.e. the height is approximately 2 times the width), so that the light path is spread along the vertical direction, and the included angle of the two side light pipes can reach the minimum (as shown in fig. 7), so that the smaller field of view can be detected. The targets 16 adopt star targets, starfish targets or cross-wire targets, and different target 16 patterns can be selected according to requirements; the light source 17 is a halogen lamp.
As shown in fig. 4, the auto-collimation switching component 14 in the auto-collimation collimator 1 includes a CCD camera 141 and a beam splitter 142; the beam splitter 142 is disposed between the target 16 and the first refractive mirror 13, and when the beam splitter is in an auto-collimation function, the standard mirror 15 is additionally disposed at the light outlet of the collimator 2, the light reflected by the standard mirror is split into two parts by the beam splitter 142, one part is transmitted and the other part is reflected to the CCD camera 141, and the auto-collimation image collected by the CCD camera 141 is observed through the display. The light source 17 illuminates the target 16 to form a simulated luminous pattern, parallel light is emitted through the spectroscope 142, sequentially passes through the first turning mirror 13, the second turning mirror 12 and the off-axis parabolic mirror 11, then is reflected back through the standard mirror 15, and returns in the original path, and is divided into two parts when passing through the spectroscope 142, one part of the light is reflected to the CCD camera 141, the other part of the light is transmitted (the transmitted part is not used for reference), and only the reflected light collected by the CCD camera 141 is analyzed; the light is reflected by the reflecting function of the beam splitter 142, which corresponds to the transmission function of the beam splitter 142 when the light is emitted. The parabolic mirror focal plane and the conjugate focal plane are symmetrical with respect to the beam splitter 142.
The auto-collimation switching assembly 14 and the parallel light pipe 2 are all secured to the same housing by respective adjustment brackets or mounts. The first turning mirror 13 and the second turning mirror 12 are located on the reflected light path of the off-axis parabolic mirror 11; target 16 is located at the focal plane of off-axis parabolic mirror 11; the CCD camera 141 is located on the conjugate focal plane of the off-axis parabolic mirror 11.
The auto-collimation function of the auto-collimation collimator 1 is used for adjusting the coaxial of the auto-collimation collimator 1 and the optical system 10 to be tested. The auto-collimation switching component 14 is provided with a positioning pin, the positioning pin falls into a groove position on the collimator 2 structure during each switching, so that the auto-collimation collimator 1 is in an auto-collimation state by abutting with a main light path, in the auto-collimation state, a target 16 selects a cross wire target, a plane mirror is attached to the front end face of the optical system 10 to be detected, a cross wire image is reflected back through the mirror and received by the CCD camera 141, the self-alignment image can be observed through a display, the offset condition of the self-alignment image and the center of the CCD camera 141 is observed, and the first two-dimensional adjusting table 3 below the auto-collimation collimator 1 is adjusted or the optical system 10 to be detected is adjusted to coincide with the first two-dimensional adjusting table; the autocollimator collimator 1 is coaxial with the optical system 10 to be measured at this time. When the auto-collimation function is not needed, the auto-collimation switching component 14 is moved out and separated from the main light path, and the auto-collimation collimator 1 is changed into a collimator 2 to enter a measurement state.
When the detection device is used for detection, the optical system 10 to be detected is required to be arranged at the center position of the circular arc guide rail 5, so that the entrance pupil position of the optical system 10 to be detected is positioned at the intersection area of the autocollimation collimator 1 and the parallel light pipe 2 for emitting parallel light beams,
the detection device is used for detecting the imaging quality of the large-view-field optical system, and comprises the following steps:
step 1) installation
According to the structure, each component of the detection device is installed in place, and the adjustable base 8 is adjusted to ensure that the heights of the auto-collimation collimator 1 and the other two collimator tubes 2 are consistent;
step 2) calibration
2.1 Placing the theodolite at the center of a circular arc guide rail 5 of the detection device (namely, the position of an optical system 10 to be detected), and adjusting the theodolite to be coaxial with the autocollimation collimator 1 by taking the intermediate autocollimation collimator 1 as a reference (the azimuth and the pitching of the theodolite are recorded as zero positions);
2.2 According to the measurement requirement, combining the graduated scale 6 and the pointer 9, and moving the positions of the two collimator tubes 2 on the arc guide rail 5;
2.3 Aligning the theodolite with the two collimator tubes 2 in turn (at this time, the pitch of the theodolite is kept at zero degrees), and adjusting the second two-dimensional adjusting table 4 below the collimator tubes 2 so that the two collimator tubes 2 are coaxial with the theodolite;
2.4 A theodolite is removed.
When detecting the imaging quality of any field of view, the detection device needs to be calibrated first.
Step 3) detection
3.1 Placing the optical system 10 to be tested in the intersection area of the emergent beams of the auto-collimation collimator 1 and the two collimator 2, namely, the entrance pupil position of the optical system 10 to be tested is positioned in the intersection area of the emergent beams of the auto-collimation collimator 1 and the two collimator 2;
3.2 Switching the autocollimation collimator 1 to an autocollimation function state (namely inserting a spectroscope 142 of the autocollimation switching component 14 between a target 16 of the collimator 2 and the first turning mirror 13, and adding a standard mirror 15 at an optical outlet of the collimator 2), and adjusting the optical system 10 to be tested to be coaxial with the autocollimation collimator 1, wherein the optical axes of the autocollimation collimator 1, the two collimator 2 and the optical system 10 to be tested are positioned on the same horizontal plane;
3.3 Taking out the auto-collimation switching component 14 in the auto-collimation collimator 1 to switch the auto-collimation collimator 1 into a measurement state;
3.4 Through the computer control and image acquisition analysis system of the optical system 10 itself to be measured, the imaging quality at the central field of view and the required field of view is measured in sequence.
In the process of assembling and adjusting the optical system to be tested, the imaging quality of each view field of the system is detected by using the invention, and the detection result can guide the assembling and adjusting process in real time, so that the best assembling effect is achieved, and the detection and assembling and adjusting auxiliary guidance of the large-view-field optical system is completed.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made without departing from the spirit and scope of the invention.
Claims (8)
1. The utility model provides a big visual field optical system detection device which characterized in that: comprises a circular arc guide rail (5), an auto-collimation collimator (1) and at least one collimator (2);
the self-collimation collimator (1) is arranged at the outer side of the arc guide rail (5), and a first two-dimensional adjusting table (3) is arranged at the bottom of the self-collimation collimator;
the at least one collimator (2) is arranged on the arc guide rail (5) in a sliding way through a second two-dimensional adjusting table (4);
the optical axes of the parallel light beams emitted by the auto-collimation collimator (1) and the at least one collimator (2) are positioned on the same horizontal plane and intersect at the center of the circular arc guide rail (5);
the number of the parallel light pipes (2) is two;
the auto-collimation collimator (1) is positioned at the outer side of the middle part of the arc guide rail (5);
the two collimator tubes (2) are respectively positioned at two sides of the auto-collimation collimator tube (1);
the auto-collimation collimator (1) and the collimator (2) are both rotated by 90 degrees and placed, so that the included angle between the collimator at two sides is minimized.
2. The large field optical system detection apparatus according to claim 1, wherein:
an adjustable base (8) is arranged at the bottom of the first two-dimensional adjusting table (3);
the bottom surface of the second two-dimensional adjusting table (4) is provided with a sliding block matched with the circular arc guide rail (5).
3. The large field optical system detection apparatus according to claim 2, wherein: the arc guide rail (5) is arranged on the guide rail fixing seat (7);
the guide rail fixing seat (7) is provided with a graduated scale (6) concentric with the circular arc guide rail (5), and the bottom of the second two-dimensional adjusting table (4) is provided with a pointer (9) matched with the graduated scale (6).
4. A large field optical system detection apparatus according to claim 3, wherein:
the central angle of the arc guide rail (5) is 120 degrees; the radius of the arc guide rail (5) is 1000mm.
5. The large field optical system detection apparatus according to claim 4, wherein:
the auto-collimation collimator (1) comprises an auto-collimation switching assembly (14) and a collimator (2);
the collimator (2) adopts an off-axis reflective collimator and comprises a light source (17), a target (16), a first refractive reflector (13), a second refractive reflector (12) and an off-axis parabolic reflector (11); light emitted by the light source (17) is transmitted through the target (16), then is reflected onto the off-axis parabolic reflector (11) through the first turning reflector (13) and the second turning reflector (12) in turn, and finally is reflected by the off-axis parabolic reflector (11) and then horizontally emits parallel light beams; -the target (16) is located on the focal plane of the off-axis parabolic mirror (11); the first turning reflector (13) and the second turning reflector (12) are positioned on the reflecting light path of the off-axis parabolic reflector (11);
the auto-collimation switching component (14) comprises a CCD camera (141) and a spectroscope (142); the spectroscope (142) is arranged between the target (16) and the first turning mirror (13); when the collimator is in an auto-collimation function, a standard reflector (15) is additionally arranged at a light outlet of the collimator (2), light reflected by the standard reflector (15) is divided into two parts by a spectroscope (142), one part of the light is transmitted and the other part of the light is reflected to a CCD camera (141), and the CCD camera (141) is positioned on a conjugate focal plane of the off-axis parabolic reflector (11);
the target (16) adopts a star point target, a starfish target or a cross wire target;
the light source (17) is a halogen lamp.
6. A large-field optical system detection method using the large-field optical system detection device according to any one of claims 1 to 5, characterized by comprising the steps of:
step 1) constructing a large-view-field optical system detection device
The large-view-field optical system detection device comprises an arc guide rail (5), an auto-collimation collimator (1) and at least one collimator (2); the self-collimation collimator (1) is arranged at the outer side of the arc guide rail (5), and a first two-dimensional adjusting table (3) is arranged at the bottom of the self-collimation collimator; the at least one collimator (2) is arranged on the arc guide rail (5) in a sliding way through a second two-dimensional adjusting table (4); the optical axes of the parallel light beams emitted by the auto-collimation collimator (1) and the at least one collimator (2) are positioned on the same horizontal plane and intersect at the center of the circular arc guide rail (5);
step 2) calibration
Calibrating the detection device constructed in the step 1) by using a theodolite according to measurement requirements;
step 3) detection
And (3) placing the optical system (10) to be measured at the intersection of the light beams emitted by the auto-collimation collimator (1) and the parallel light pipe (2), and respectively measuring the imaging quality of the optical system (10) to be measured at different view fields.
7. The method according to claim 6, wherein,
the number of the collimator tubes (2) in the large-view-field optical system detection device built in the step 1) is two; the auto-collimation collimator (1) is positioned at the outer side of the middle part of the arc guide rail (5); the two collimator tubes (2) are respectively positioned at two sides of the auto-collimation collimator tube (1);
an adjustable base (8) is arranged at the bottom of the first two-dimensional adjusting table (3); the bottom surface of the second two-dimensional adjusting table (4) is provided with a sliding block matched with the circular arc guide rail (5);
the arc guide rail (5) is arranged on the guide rail fixing seat (7); a graduated scale (6) concentric with the circular arc guide rail (5) is arranged on the guide rail fixing seat (7), and a pointer (9) matched with the graduated scale (6) is arranged at the bottom of the second two-dimensional adjusting table (4);
the specific steps of the step 2) are as follows:
2.1 Placing the theodolite at the center of a circular arc guide rail (5) of the detection device, and adjusting the theodolite by taking the auto-collimation collimator (1) as a reference to enable the theodolite to be coaxial with the auto-collimation collimator (1);
2.2 According to the measurement requirement, combining a graduated scale (6) and a pointer (9), and moving the positions of the two collimator tubes (2) on the arc guide rail (5);
2.3 The theodolite is sequentially aligned with the two collimator tubes (2), and a second two-dimensional adjusting table (4) below the collimator tubes (2) is adjusted so that the collimator tubes (2) are coaxial with the theodolite;
2.4 A theodolite is removed.
8. The method according to claim 7, wherein the specific steps of step 3) are:
3.1 Placing an optical system (10) to be tested at the intersection of the autocollimation collimator (1) and the emergent beam of the parallel collimator (2);
3.2 Switching the auto-collimation collimator (1) to an auto-collimation function state, and adjusting the optical system (10) to be tested to be coaxial with the auto-collimation collimator (1);
3.3 Taking out an auto-collimation switching component (14) in the auto-collimation collimator (1) to switch the auto-collimation collimator (1) into a measurement state;
3.4 The imaging quality of the central view field and the large view field is measured sequentially through the computer control and image acquisition analysis system of the optical system (10) to be measured.
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| CN114594611B (en) * | 2020-12-03 | 2024-03-22 | 余姚舜宇智能光学技术有限公司 | Active calibration device and method thereof |
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