CN116952544A - Auxiliary calibration tool for AR optical waveguide performance detection equipment and use method - Google Patents
Auxiliary calibration tool for AR optical waveguide performance detection equipment and use method Download PDFInfo
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention discloses an auxiliary calibration tool for AR optical waveguide performance detection equipment and a use method thereof, wherein the auxiliary calibration tool comprises a main optical path for solid diaphragm projection, a spectroscope group for separating the main optical path is arranged on the main optical path, and a reflecting mirror group corresponding to the spectroscope group, which projects a reflected image of the spectroscope to a projection module and an imaging module of the detection equipment, and a receiving arm and an output arm are correspondingly arranged at the butt joint positions of the auxiliary calibration tool and the projection module and the imaging module; the physical diaphragm is matched with the diaphragms of the detection equipment projection module and the imaging module through the main light path projection virtual diaphragm of the auxiliary calibration tool, and the receiving arm and the output arm of the auxiliary calibration tool can be correspondingly adjusted according to the incidence angle and the emergent angle of the optical waveguide to be detected, so that the adjustment can be carried out according to the space angle of the optical waveguide to be detected, the auxiliary adjustment of the optical waveguide detection equipment with various specifications can be satisfied, the difficulty of diaphragm matching is reduced, and the matching and adjustment efficiency is improved.
Description
Technical Field
The invention relates to the technical field of optical waveguide performance detection, in particular to an auxiliary calibration tool for AR optical waveguide performance detection equipment and a use method thereof.
Background
The AR optical waveguide has the advantages of light weight, high transmittance, large FOV and the like, and along with the reduction of cost, more and more consumer-grade AR glasses already adopt the optical waveguide technology, and the light weight level of the high-integration whole machine is up to 80 g. The optical waveguide module has the same advantages in the aspects of view angle, resolution, brightness, light transmittance, eyebox and the like. The performance detection is particularly important in the optical waveguide production and manufacturing process, and for the optical performance detection of the optical waveguide, the current technical scheme is that a projection module projects a designed pattern to be coupled into the optical waveguide at an incidence grating, and the eye movement range eyebox is formed at an exit pupil by the coupling-out grating through the transmission of the optical waveguide. Meanwhile, the incident light and the emergent light of the diffraction grating form a certain space included angle with the normal line of the optical waveguide, and the projection module and the imaging module form certain angle distribution in space, so that certain difficulty is brought to the calibration and the positioning of the optical waveguide performance detection equipment.
Disclosure of Invention
The technical purpose is that: aiming at the defect that the conventional optical waveguide performance detection equipment is inconvenient to calibrate and position because of a space included angle, the invention discloses an auxiliary calibration tool for AR optical waveguide performance detection equipment and a use method thereof, wherein the auxiliary calibration tool can be used for carrying out auxiliary adjustment on optical waveguide detection equipment with various specifications according to the space angle of an optical waveguide to be detected.
The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:
the auxiliary calibration tool for the AR optical waveguide performance detection equipment comprises a main optical path for physical diaphragm projection, a spectroscope group for separating the main optical path is arranged on the main optical path, and a reflecting mirror group corresponding to the spectroscope group, wherein a reflected image of the spectroscope is projected to a projection module and an imaging module of the detection equipment, and a receiving arm and an output arm are correspondingly arranged at the butt joint positions of the auxiliary calibration tool and the projection module and the imaging module; the physical diaphragm is matched with the diaphragms of the detection equipment projection module and the imaging module through the virtual diaphragm projected by the main light path of the auxiliary calibration tool.
Preferably, a beam splitting prism is arranged on the front side of a physical diaphragm on a main optical path, one beam splitting optical path of the beam splitting prism is consistent with the direction of the main optical path and faces to the side where the beam splitting prism is away from the physical diaphragm, a half-mirror is arranged on the corresponding beam splitting optical path, the direction of a reflection optical path of the half-mirror is consistent with the direction of the main optical path, a camera is arranged on a transmission optical path of the half-mirror, a laser indication light source is arranged on one side of the beam splitting prism along the direction perpendicular to the direction of the main optical path, and laser emitted by the laser indication light source is transmitted along the direction of the main optical path through the beam splitting prism and the half-mirror.
Preferably, the beam splitter group of the invention comprises a second beam splitter prism and a deflection prism for adjusting the direction of the beam splitting light path of the second beam splitter prism to reflect to the reflecting mirror group, the reflecting mirror group comprises a plurality of reflecting mirrors, and the reflecting mirrors are correspondingly arranged on the beam splitting light path of the second beam splitter prism to reflect the two beam splitting light paths of the second beam splitter prism to the projection module and the imaging module of the detection equipment.
The invention also provides a using method of the auxiliary calibration tool for the AR optical waveguide performance detection equipment, which comprises the following steps:
s01, self-calibrating an optical path of the auxiliary calibration tool through a photoelectric auto-collimator;
s02, after calibration is completed, the angles of a receiving arm and an output arm of the auxiliary calibration tool are adjusted through the laser indication light source matched with the photoelectric auto-collimator, so that the spatial postures of the receiving arm and the output arm are consistent with the incident and emergent angles of the optical waveguide to be measured;
s03, after adjustment is completed, the physical diaphragm is projected into a virtual diaphragm through a main light path of the auxiliary calibration tool, and the virtual diaphragm is matched with the diaphragm of the detection equipment projection module and the diaphragm of the imaging module, so that calibration and positioning of the detection equipment are completed.
Preferably, in step S01, the process of self-calibrating the optical path of the auxiliary calibration fixture includes:
s011, providing a cross line image through a photoelectric collimator, wherein the working caliber of the photoelectric autocollimator is larger than the arm width between a receiving arm and an output arm of the auxiliary calibration tool;
s012, the reticle images are reversely transmitted along a beam splitting light path and a main light path of the auxiliary calibration tool, the angles of the beam splitter group and the reflecting mirror group are adjusted, so that the transmitted reticle images are imaged on a camera of the main light path, and the reticle images transmitted by the two beam splitting light paths are overlapped and are positioned at the center of an image plane of the camera;
s013, turning on a laser indication light source, projecting laser emitted by the laser indication light source onto a photoelectric auto-collimator through a spectroscope group and a reflecting mirror group, and adjusting the spatial posture of the laser indication light source to enable an optical axis transmitted by the laser indication light source on an auxiliary calibration tool to coincide with an optical axis of the auxiliary calibration tool, so that self calibration of the auxiliary calibration tool is completed.
Preferably, in step S02, the process of adjusting the receiving arm and the output arm of the auxiliary calibration fixture by the laser indication light source includes: and turning on the laser indication light source, projecting laser emitted by the laser indication light source onto the photoelectric auto-collimator through the main light path and the beam splitting light path, and judging whether the receiving arm and the output arm are adjusted to the incident and emergent angles corresponding to the optical waveguide according to the offset of the laser output light spot received by the photoelectric auto-collimator.
Preferably, in step S03, after performing aperture matching, the present invention calibrates the matching result, and the calibration process includes:
placing a dividing plate at the entrance pupil of the projection module, projecting the dividing plate through an external light source, enabling an image of the dividing plate to enter a receiving arm of the auxiliary calibration tool through an exit diaphragm of the projection module, and projecting the image of the dividing plate onto a receiving surface of a camera through a light splitting light path and a main light path in sequence; part of light is reflected to the spectroscope group along the main light path by the half-mirror at the front end of the camera, and is projected to the imaging module along the corresponding spectroscope; judging whether the spatial postures and positions of the diaphragm of the projection module and the diaphragm of the receiving arm are matched or not through the projection image received by the camera, and detecting the matching of the imaging module and the diaphragm of the output arm through the light spots projected onto the imaging module; and in the same way, the space gesture and position matching detection of the diaphragm of the imaging module and the diaphragm of the output arm and the diaphragm matching detection of the projection module and the diaphragm of the receiving arm are carried out.
Preferably, the differentiation plate is provided with a complete differentiation circle and a notch differentiation circle, the symmetry of the image received by the camera and whether the space gesture and the position of the diaphragm are matched are detected by the incomplete or not when the complete differentiation circle is projected, and the rotation angle of the diaphragm is detected by the projection of the notch differentiation circle.
The beneficial effects are that: the auxiliary calibration tool for the AR optical waveguide performance detection equipment and the use method thereof have the following beneficial effects:
1. the auxiliary calibration tool disclosed by the invention projects the physical diaphragm into the virtual diaphragm through the optical path, can well perform diaphragm matching with the projection module and the imaging module of the detection equipment with the adjustment, reduces the difficulty of diaphragm matching, and improves the matching and adjustment efficiency.
2. The receiving arm and the output arm of the auxiliary calibration fixture can be correspondingly adjusted according to the incident angle and the emergent angle of the optical waveguide to be measured, so that the auxiliary calibration fixture can be adjusted according to the space angle of the optical waveguide to be measured, and can meet the auxiliary adjustment of optical waveguide detection equipment with various specifications.
3. According to the invention, the self calibration is carried out on the auxiliary calibration light path, the calibration is carried out on the light path of the laser indication light source through the photoelectric autocollimator, the offset projected on the photoelectric autocollimator by the laser indication light source is used for detecting the angles of the receiving arm and the output arm, the accuracy of angle adjustment can be ensured, and meanwhile, the receiving arm and the output arm are kept on the light path of the auxiliary calibration tool, so that the diaphragm matching and the detection can be conveniently carried out after the adjustment.
4. After the diaphragm matching is completed, the space posture and the position of the diaphragm matching and the rotation angle of the diaphragm are detected by projecting the complete differentiation circle and the notch differentiation circle, so that the accuracy of the diaphragm matching is ensured, the matching result can be verified and detected, and the matched diaphragm can be accurately adjusted.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a schematic diagram of the matching of an optical waveguide performance detection diaphragm of the present invention;
FIG. 2 is a schematic diagram of an auxiliary calibration fixture of the present invention;
FIG. 3 is a schematic diagram of a beam splitting and turning optical path using a prism in accordance with the present invention;
FIG. 4 is a schematic diagram of self calibration of an auxiliary calibration fixture of the present invention;
FIG. 5 is a schematic view of adjusting the angles of two arms of the auxiliary tool according to the angle requirement of the optical waveguide to be measured;
FIG. 6 is a schematic diagram of the auxiliary calibration tool for detecting diaphragm matching of a projection module and an imaging module;
FIG. 7 is a main light path layout diagram of the auxiliary calibration fixture of the present invention;
FIG. 8 is a graph of the optical transfer function of the auxiliary calibration fixture of the present invention
FIG. 9 is a main optical path distortion chart of the auxiliary calibration fixture of the present invention
Fig. 10 is a main light path spot diagram of the auxiliary calibration fixture of the present invention.
The system comprises a 1-solid diaphragm, a 2-main light path, a 3-projection module, a 4-imaging module, a 5-receiving arm, a 6-output arm, a 7-beam splitter prism, an 8-half mirror, a 9-camera, a 10-laser indication light source, an 11-second beam splitter prism, a 12-beam splitter prism, a 13-reflecting mirror, a 14-photoelectric autocollimator, a 15-dividing plate, a 16-exit diaphragm, a 17-complete dividing circle, a 18-notch dividing circle, a 19-optical waveguide, a 20-entrance pupil, a 21-pinhole diaphragm, a 22-heterolateral coupling-out grating, a 23-homolateral coupling-out grating, a 24-heterolateral receiving module, a 25-homolateral receiving module, a 26-first optical lens, a 27-second optical lens, a 28-third optical lens, a 29-fourth optical lens, a 30-fifth optical lens, a 31-sixth optical lens, a 32-seventh optical lens and a 33-virtual diaphragm.
Description of the embodiments
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which preferred embodiments of the invention are shown, but in which the invention is not so limited.
As shown in fig. 1-10, the invention discloses an auxiliary calibration tool for an AR optical waveguide performance detection device, which comprises a main optical path 2 for projection of an entity diaphragm 1, a beam splitter group which is used for separating the main optical path 2 and is arranged on the main optical path 2, and a reflecting mirror group which is corresponding to the beam splitter group and is used for projecting a reflected image of the beam splitter optical path to a projection module 3 and an imaging module 4 of the detection device, wherein the auxiliary calibration tool is provided with a receiving arm 5 and an output arm 6 which are corresponding to the butt joint positions of the projection module 3 and the imaging module 4; the physical diaphragm 1 projects a virtual diaphragm 33 through a main light path 2 of the auxiliary calibration tool and is matched with diaphragms of a projection module 3 and an imaging module 4 of the detection equipment.
Specifically, a beam splitting prism 7 is arranged on the front side of a physical diaphragm 1 on a main light path 2, one beam splitting light path of the beam splitting prism 7 is consistent with the direction of the main light path 2 and faces to the side away from the physical diaphragm 1, a half mirror 8 is arranged on the corresponding beam splitting light path, the direction of a reflecting light path of the half mirror 8 is consistent with the direction of the main light path 2, a camera 9 is arranged on a transmitting light path of the half mirror 8, a laser indicating light source 10 is arranged on one side of the beam splitting prism 7 along the direction perpendicular to the main light path 2, and laser emitted by the laser indicating light source 10 is transmitted along the direction of the main light path 2 through the beam splitting prism 7 and the half mirror 8.
The beam splitter group comprises a second beam splitter prism 11 and a turning prism 12 for adjusting the direction of a beam splitting light path of the second beam splitter prism 11 to reflect to the reflecting mirror group, wherein the reflecting mirror group comprises a plurality of reflecting mirrors 13, and the reflecting mirrors 13 are correspondingly arranged on the beam splitting light path of the second beam splitter prism 11 to reflect two beam splitting light paths of the second beam splitter prism 11 to a projection module 3 and an imaging module 4 of the detection equipment.
As shown in fig. 1-3, the optical waveguide 19 to be measured is typically arranged at the entrance pupil 20 formed by the coupling-in grating of the AR glasses close to the temples; the image and text information projected by the projection module 21 is coupled into the optical waveguide 19 through an entrance pupil, is transmitted to the different-side coupling-out grating 22 or the same-side coupling-out grating 23 through a transmission grating, and is expanded to form an eye pupil distance d3 or d4, wherein d3=d4, and the eye pupil distance is 16-20 mm; meanwhile, the diaphragm of the different-side imaging module 24 or the diaphragm of the same-side imaging module 25 coincides with the exit pupil of the optical waveguide 19; in order to improve the energy utilization rate and give consideration to the angle of the optical waveguide coupling-in and coupling-out grating, the projection module 21, the opposite-side imaging module 24 and the same-side imaging module 25 are arranged at a certain spatial angle with the surface normal of the optical waveguide 19, which brings great difficulty to the projection of the detection equipment and the angle calibration adjustment of the imaging modules. By using the auxiliary calibration tool disclosed by the invention, the projection module 21 and the two imaging modules can be accurately positioned according to the incident angle and the emergent angle of the optical waveguide 19, and the performance of the optical waveguide can be accurately detected.
The projection module 21 of the detection device projects a reticle target, the reticle target is folded by 90 degrees through the receiving arm 5 and the reflecting mirror of the auxiliary calibration tool, then reaches the semi-transparent semi-reflecting mirror 8 after passing through the spectroscope group, one part of light reaches the light sensitive surface of the camera 9, the space posture of the projection module 21 is adjusted to enable the reticle on the receiving surface of the camera 9 to coincide with the center of the camera, the other part of light is reflected and then output through the output arm 6 of the tool after passing through the folded light path of the spectroscope group, and the received reticle target coincides with the center of the camera of the imaging module through the inclination, the eccentricity and the like of the imaging module 4 of the detection device, so that the space posture adjustment and the calibration of the projection module and the imaging module of the detection device are completed.
The invention also provides a using method of the auxiliary calibration tool for the AR optical waveguide performance detection equipment, which comprises the following steps:
s01, self-calibrating an optical path of the auxiliary calibration tool through a photoelectric auto-collimator;
s02, after calibration is completed, the angles of a receiving arm and an output arm of the auxiliary calibration tool are adjusted through the laser indication light source matched with the photoelectric auto-collimator, so that the spatial postures of the receiving arm and the output arm are consistent with the incident and emergent angles of the optical waveguide to be measured;
s03, after adjustment is completed, the physical diaphragm is projected into a virtual diaphragm through a main light path of the auxiliary calibration tool, and the virtual diaphragm is matched with the diaphragm of the detection equipment projection module and the diaphragm of the imaging module, so that calibration and positioning of the detection equipment are completed.
As shown in fig. 4, in order to ensure accurate calibration and positioning of the detection device, in step S01, the process of self-calibrating the optical path of the auxiliary calibration fixture includes:
s011, providing a cross line image through a photoelectric collimator 14, wherein the working caliber of the photoelectric autocollimator 14 is larger than the arm width between a receiving arm 5 and an output arm 6 of the auxiliary calibration tool;
s012, the reticle images are reversely transmitted along the beam splitting light path and the main light path 2 of the auxiliary calibration tool, the angles of the beam splitter group and the reflecting mirror group are adjusted, the transmitted reticle images are imaged on the camera 9 of the main light path 2, and the reticle images transmitted by the two beam splitting light paths are overlapped and are positioned at the center of the image plane of the camera 9;
s013, turning on the laser indication light source 10, projecting laser emitted by the laser indication light source 10 onto the photoelectric auto-collimator 14 through the spectroscope group and the reflecting mirror group, and adjusting the spatial posture of the laser indication light source 10 to enable the optical axis transmitted by the laser indication light source 10 on the auxiliary calibration tool to coincide with the optical axis of the auxiliary calibration tool, so as to complete the self calibration of the auxiliary calibration tool; by self-calibrating the auxiliary calibration fixture, the superposition of the optical axis of laser transmission and the optical axis of the auxiliary calibration fixture is ensured, and the angle can be accurately adjusted by utilizing the laser light path to match with the photoelectric auto-collimator 14 when the angle of the receiving arm 5 and the angle of the conveying arm 6 are adjusted.
As shown in fig. 5, in step S02, the process of adjusting the receiving arm 5 and the output arm 6 of the auxiliary calibration fixture by the laser indication light source 10 includes: the laser indication light source 10 is turned on, the laser emitted by the laser indication light source 10 is projected onto the photoelectric auto-collimator 14 through the main light path and the beam splitting light path, and whether the receiving arm 5 and the output arm 6 are adjusted to the incident angle and the emergent angle corresponding to the optical waveguide is judged according to the offset of the laser output light spot received by the photoelectric auto-collimator 14.
The offset of the laser spot relative to the center of the photoelectric auto-collimator is faty, fatx=f '. Tan (θx), and faty=f'. Tan (θy); and the theta X and the theta Y are included angles between the incidence angle or the emergence angle of the optical waveguide and the X axis and the Y axis, and the f' is the focal length of the photoelectric auto-collimator, so that the offset X and the Y of the light spots output by the receiving arm 5 and the output arm 6 on the photoelectric auto-collimator can be correspondingly adjusted according to the incidence angle or the emergence angle of the optical waveguide, and whether the receiving arm and the output arm are adjusted in place or not is judged.
As shown in fig. 6, in step S03, after performing aperture matching, the present invention calibrates the matching result, and the calibration process includes:
placing a dividing plate 15 at the entrance pupil of the projection module 3, projecting the dividing plate 15 through an external light source, enabling an image of the dividing plate 15 to enter a receiving arm 5 of the auxiliary calibration tool through an exit diaphragm 16 of the projection module 3, and projecting the image onto a receiving surface of a camera 9 through a light splitting light path and a main light path 2 in sequence; part of light is reflected to the spectroscope group along the main light path 2 by the half-mirror 8 at the front end of the camera 9, and is projected onto the imaging module 4 along the corresponding spectroscope; judging whether the space postures and positions of the diaphragms of the projection module 3 and the diaphragms of the receiving arms 5 are matched through the projection images received by the camera 9, and detecting the diaphragms of the imaging module 4 and the output arms 6 through the light spots projected onto the imaging module 4; in the same way, the spatial posture and position matching detection of the diaphragm of the imaging module 4 and the diaphragm of the output arm 6 and the diaphragm matching detection of the projection module 3 and the receiving arm 5 are performed. The dividing plate 15 is provided with the complete dividing circle 17 and the notch dividing circle 18, vignetting is generated when the spatial posture and the position of the diaphragm are not matched when the complete dividing circle 17 is projected, and the method is characterized in that the symmetry of the image received by the camera 9 and whether the spatial posture and the position of the diaphragm are matched due to incomplete or not are detected, and the rotation angle of the diaphragm is detected through the projection of the notch dividing circle 18.
As shown in fig. 7, the invention discloses a specific arrangement mode of optical elements on an optical path of an auxiliary calibration tool, a first optical lens 26, a second optical lens 27, a third optical lens 28, a fourth optical lens 29, a fifth optical lens 30, a sixth optical lens 31 and a seventh optical lens 32 are arranged between a second beam splitter prism 11 and a beam splitter prism 7 along the direction of the main optical path on a main optical path 2, and a pinhole diaphragm 21 is arranged at the output end of a laser indication light source 10 for spatial filtering of laser indication; and provides the specific optical element parameters for the examples as shown in table 1.
Table 1 auxiliary fixture main light path optical element parameter statistical table
The plane is that the optical element in the light path is a plane or a sphere; the radius of curvature is the degree of curvature of the lens; the thickness or spacing is the spacing distance between the lenses themselves or between the lenses; the refractive index and abbe number are parameters of the glass material used for the optical element. As shown in fig. 8-10, the optical performance of the main optical path lens reaches the diffraction limit and is achromatized, so that the deviation degree of space intersection to be adjusted is reduced, the adjusting angle is closer to the target angle, adverse effects on adjustment of a projection and imaging module and diaphragm position judgment are avoided, and the accuracy of calibration and positioning is ensured.
The foregoing is only a preferred embodiment of the invention, it being noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the present invention, and such modifications and adaptations are intended to be comprehended within the scope of the invention.
Claims (8)
1. The auxiliary calibration tool for the AR optical waveguide performance detection equipment is characterized by comprising a main optical path (2) for projection of an entity diaphragm (1), wherein a spectroscope group for separating the main optical path (2) is arranged on the main optical path (2), and a reflecting mirror group corresponding to the spectroscope group is used for projecting a reflected image of the spectroscope to a projection module (3) and an imaging module (4) of the detection equipment, and a receiving arm (5) and an output arm (6) are arranged at the butt joint position of the auxiliary calibration tool and the projection module (3) and the imaging module (4) correspondingly; the physical diaphragm (1) projects a virtual diaphragm through a main light path (2) of the auxiliary calibration tool, and is matched with diaphragms of a projection module (3) and an imaging module (4) of the detection equipment.
2. The auxiliary calibration tool for the AR optical waveguide performance detection equipment according to claim 1, wherein a beam splitting prism (7) is arranged on the front side of the entity diaphragm (1) on the main optical path (2), one path of beam splitting optical path of the beam splitting prism (7) is consistent with the direction of the main optical path (2) and faces to the side away from the entity diaphragm (1), a half-mirror (8) is arranged on the corresponding beam splitting optical path, the direction of a reflection optical path of the half-mirror (8) is consistent with the direction of the main optical path (2), a camera (9) is arranged on the transmission optical path of the half-mirror (8), a laser indication light source (10) is arranged on the side of the beam splitting prism (7) along the direction perpendicular to the main optical path (2), and laser emitted by the laser indication light source (10) is transmitted along the direction of the main optical path (2) through the beam splitting prism (7) and the half-mirror (8).
3. The auxiliary calibration tool for the AR optical waveguide performance detection device according to claim 1, wherein the beam splitter group comprises a second beam splitter prism (11) and a turning prism (12) for adjusting the direction of a beam splitting light path of the second beam splitter prism (11) to reflect to the reflecting mirror group, the reflecting mirror group comprises a plurality of reflecting mirrors (13), the reflecting mirrors (13) are correspondingly arranged on the beam splitting light path of the second beam splitter prism (11), and two beam splitting light paths of the second beam splitter prism (11) are reflected to a projection module (3) and an imaging module (4) of the detection device.
4. A method of using an auxiliary scaling tool for an AR optical waveguide performance inspection apparatus according to any one of claims 1-3, comprising the steps of:
s01, self-calibrating an optical path of the auxiliary calibration tool through a photoelectric auto-collimator;
s02, after calibration is completed, the angles of a receiving arm and an output arm of the auxiliary calibration tool are adjusted through the laser indication light source matched with the photoelectric auto-collimator, so that the spatial postures of the receiving arm and the output arm are consistent with the incident and emergent angles of the optical waveguide to be measured;
s03, after adjustment is completed, the physical diaphragm is projected into a virtual diaphragm through a main light path of the auxiliary calibration tool, and the virtual diaphragm is matched with the diaphragm of the detection equipment projection module and the diaphragm of the imaging module, so that calibration and positioning of the detection equipment are completed.
5. The method for using the auxiliary calibration fixture for an AR optical waveguide performance inspection apparatus according to claim 4, wherein in step S01, the process of self-calibrating the optical path of the auxiliary calibration fixture includes:
s011, providing a cross line image through a photoelectric collimator (14), wherein the working caliber of the photoelectric collimator (14) is larger than the arm width between a receiving arm (5) and an output arm (6) of the auxiliary calibration tool;
s012, reversely transmitting the cross line images along a light splitting light path and a main light path (2) of the auxiliary calibration tool, adjusting angles of a spectroscope group and a reflecting mirror group, imaging the transmitted cross line images onto a camera (9) of the main light path (2), and overlapping the cross line images transmitted by the two light splitting light paths and locating at the center of an image plane of the camera (9);
s013, turning on the laser indication light source (10), projecting laser emitted by the laser indication light source (10) onto the photoelectric auto-collimator (14) through the spectroscope group and the reflecting mirror group, and adjusting the spatial posture of the laser indication light source (10) to enable the optical axis transmitted by the laser indication light source (10) on the auxiliary calibration tool to coincide with the optical axis of the auxiliary calibration tool, so that the self calibration of the auxiliary calibration tool is completed.
6. The method according to claim 5, wherein in step S02, the process of adjusting the receiving arm (5) and the output arm (6) of the auxiliary calibration fixture by the laser indication light source (10) includes: and (3) turning on the laser indication light source (10), projecting laser emitted by the laser indication light source (10) onto the photoelectric auto-collimator (14) through a main light path and a beam splitting light path, and judging whether the receiving arm (5) and the output arm (6) are adjusted to the incident and emergent angles corresponding to the optical waveguide according to the offset of the laser output light spot received by the photoelectric auto-collimator (14).
7. The method for using the auxiliary calibration fixture for AR optical waveguide performance inspection equipment according to claim 5, wherein in step S03, after performing aperture matching, the matching result is calibrated, and the calibration process includes:
a dividing plate (15) is placed at the entrance pupil of the projection module (3), the dividing plate (15) is projected by an external light source, an image of the dividing plate (15) enters a receiving arm (5) of the auxiliary calibration tool through an exit diaphragm (16) of the projection module (3), and is projected onto a receiving surface of a camera (9) through a light splitting light path and a main light path (2) in sequence; part of light is reflected to the spectroscope group along the main light path (2) by a half-mirror (8) at the front end of the camera (9), and is projected to the imaging module (4) along the corresponding spectroscope; judging whether the spatial postures and positions of the diaphragms of the projection module (3) and the diaphragms of the receiving arms (5) are matched or not through the projection images received by the camera (9), and detecting the diaphragms of the imaging module (4) and the output arms (6) through the light spots projected onto the imaging module (4); in the same way, the spatial posture and position matching detection of the diaphragm of the imaging module (4) and the diaphragm of the output arm (6) and the diaphragm matching detection of the projection module (3) and the receiving arm (5) are carried out.
8. The method for using the auxiliary calibration fixture for the AR optical waveguide performance detection device according to claim 7, wherein the differentiation plate (15) is provided with a complete differentiation circle (17) and a notch differentiation circle (18), and the detection of the spatial posture and the position of the diaphragm is performed by the symmetry of the image received by the camera (9) and whether the diaphragm is incomplete when the complete differentiation circle (17) is projected, and the detection of the rotation angle of the diaphragm is performed by the projection of the notch differentiation circle (18).
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| CN202311097893.1A CN116952544B (en) | 2023-08-29 | 2023-08-29 | Auxiliary calibration tool for AR optical waveguide performance detection equipment and use method |
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| CN2224597Y (en) * | 1995-01-13 | 1996-04-17 | 徐州光学仪器总厂 | Multifunctional and multi-region microcirculation microscopic instrument |
| JP2000321165A (en) * | 1999-05-12 | 2000-11-24 | Matsushita Electric Ind Co Ltd | Apparatus and method for adjustment of optical axis as well as light-detecting-unit inspection apparatus and confirmation method for accuracy of light-detecting-unit inspection apparatus |
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