CN114624899B - Optical system calibration method, optical system calibration device, and storage medium - Google Patents
Optical system calibration method, optical system calibration device, and storage medium Download PDFInfo
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- CN114624899B CN114624899B CN202210240641.9A CN202210240641A CN114624899B CN 114624899 B CN114624899 B CN 114624899B CN 202210240641 A CN202210240641 A CN 202210240641A CN 114624899 B CN114624899 B CN 114624899B
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/32—Fiducial marks and measuring scales within the optical system
- G02B27/34—Fiducial marks and measuring scales within the optical system illuminated
Abstract
The invention discloses an optical system calibration method, an optical system calibration device and a computer readable storage medium. Wherein the method comprises the following steps: controlling the first laser and the second laser to emit laser along the same optical axis in opposite directions; placing the optical system between the first laser and the second laser, and adjusting the position of the optical system until the preset condition of the completion of the calibration of the optical system is met; the preset condition includes that the first incident light and the second emergent light are coaxial and/or the second incident light and the first emergent light are coaxial, the first incident light is laser light of the first laser which is incident to the optical system, the first emergent light is light of the first incident light which is emergent after passing through the optical system, the second incident light is laser light of the second laser which is incident to the optical system, and the second emergent light is light of the second incident light which is emergent after passing through the optical system. The invention aims to improve the accuracy of optical axis calibration of an optical system.
Description
Technical Field
The present invention relates to the technical field of optical devices, and in particular, to an optical system calibration method, an optical system calibration apparatus, and a computer-readable storage medium.
Background
For optical systems, alignment of the optical axis of each optical device (e.g., lens) in the optical system is an important element.
At present, the calibration of an optical system generally emits unidirectional laser through a laser source, an optical device in the optical system is placed in the laser to enable the laser to be emitted after passing through the optical device, a panel is arranged on an emitting surface of the optical device to receive an emitting light spot, and a light path is calibrated by checking the size of the receiving light spot and whether the receiving light spot is incident to the center of the optical device. The optical axis after the optical system is calibrated is easy to deviate from the required optical axis in a large degree by the calibration mode, and especially when more than one optical device exists in the optical system, the optical axis is easy to incline due to the superposition of offset angles of the optical devices, and large errors exist.
Disclosure of Invention
The invention mainly aims to provide an optical system calibration method, an optical system calibration device and a computer readable storage medium, which aim to improve the accuracy of optical axis calibration of an optical system.
To achieve the above object, the present invention provides an optical system calibration method comprising the steps of:
controlling the first laser and the second laser to emit laser along the same optical axis in opposite directions;
Placing an optical system between the first laser and the second laser, and adjusting the position of the optical system until a preset condition for completing the calibration of the optical system is met;
the preset condition includes that a first incident light and a second emergent light are coaxial and/or a second incident light and a first emergent light are coaxial, the first incident light is laser light of the first laser entering the optical system, the first emergent light is light of the first incident light exiting after passing through the optical system, the second incident light is laser light of the second laser entering the optical system, and the second emergent light is light of the second incident light exiting after passing through the optical system.
Optionally, the optical system includes at least two optical devices, and the step of placing the optical system between the first laser and the second laser and adjusting the position of the optical system until the first incident light is coaxial with the second outgoing light and the second incident light is coaxial with the first outgoing light includes:
determining a target optic of the at least two optics; the target optics are optics that are not placed between the first laser and the second laser;
Placing the target optic between the first laser and the second laser;
adjusting the position of the target optical device until the first sub-incident light and the second sub-emergent light are coaxial and the second sub-incident light and the first sub-emergent light are coaxial;
returning to the step of determining a target one of the at least two optics until the at least two optics are all located between the first laser and the second laser and the preset condition is met;
the first sub-incident light is the laser light of the first laser incident on the target optical device, the first sub-emergent light is the light emitted by the first sub-incident light after passing through the target optical device, the second sub-incident light is the laser light of the second laser incident on the target optical device, and the second sub-emergent light is the light emitted by the second sub-incident light after passing through the target optical device.
Optionally, the step of adjusting the position of the optical system until a preset condition for completion of the optical system calibration is satisfied includes:
placing an optical target between the first laser and the optical system in a first target state, wherein the first target state is that a light spot formed on the optical target by the first laser coincides with a preset identification position on the optical target;
Adjusting the position of the optical system until the light spot formed by the second laser on the light target coincides with the preset identification position;
and/or placing the optical target between the second laser and the optical system in a second target state, wherein the second target state is that a light spot formed by the second laser on the optical target coincides with a preset identification position on the optical target;
and adjusting the position of the optical system until the light spot formed by the first laser on the light target coincides with the preset identification position.
Optionally, the laser light emitted by the first laser and the laser light emitted by the second laser have different colors.
Optionally, the step of controlling the first laser and the second laser to emit laser light in opposite directions and along the same optical axis includes:
controlling the first laser to emit laser light towards the second laser, and controlling the second laser to emit laser light towards the first laser;
placing an optical target between the first laser and the second laser at least at two positions, and adjusting the first laser and/or the second laser so that a first light spot and a second light spot corresponding to each of the at least two positions coincide with a preset identification position of the optical target;
The first light spot is a light spot formed by the first laser on the optical target, and the second light spot is a light spot formed by the second laser on the optical target.
Optionally, the at least two positions include a first position and a second position, a distance between the first position and the first laser is smaller than a distance between the second position and the second laser, a distance between the second position and the first laser is smaller than a distance between the first position and the second laser, and the step of placing the optical target between the first laser and the second laser in at least two positions and adjusting the first laser and/or the second laser so that a first light spot and a second light spot corresponding to each position in the at least two positions overlap with a preset identification position of the optical target includes:
placing the optical target at the first position in a third target state, wherein the third target state is that the first light spot coincides with a preset identification position on the optical target;
adjusting the second laser until the second light spot coincides with the preset mark position;
placing the light target at the second position in a fourth target state, wherein the fourth target state is that the second light spot coincides with the preset identification position;
And adjusting the first laser until the first light spot coincides with the preset identification position.
Optionally, the at least two positions further include a plurality of third positions between the first laser and the second laser except the first position and the second position, and after the step of adjusting the first laser until the first light spot coincides with the preset identification position, the method further includes:
and moving the optical target to each third position and adjusting the first laser and/or the second laser so that the first light spot and the second light spot corresponding to each third position coincide with the preset identification position.
In order to achieve the above object, the present application also provides an optical system calibration device including:
a first laser;
a second laser;
the control device, first laser instrument with the second laser instrument all with controlling means is connected, controlling means includes: a memory, a processor, and an optical system calibration program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the optical system calibration method as claimed in any one of the preceding claims.
Optionally, the optical system calibration device further comprises a semitransparent light target movably arranged between the first laser and the second laser.
In addition, in order to achieve the above object, the present application also proposes a computer-readable storage medium having stored thereon an optical system calibration program which, when executed by a processor, implements the steps of the optical system calibration method as set forth in any one of the above.
According to the method for calibrating the optical system, the two lasers emit laser in opposite directions along the same optical axis, the optical system is placed between the two lasers and adjusted on the basis of the two lasers until the preset condition is achieved, the preset condition is that the emergent light of the laser emitted by the first laser after passing through the optical system is coaxial with the laser emitted by the second laser, and/or the emergent light of the laser emitted by the second laser after passing through the optical system is coaxial with the laser emitted by the first laser, the optical axis of the optical system after calibration can be consistent with the optical axis of the optical system before the two lasers are placed in the optical system by replacing a single laser calibration mode through double laser calibration, the optical axis after the optical system is calibrated is ensured to be consistent with the required optical axis, and the optical axis inclination cannot occur, so that the accuracy of the optical axis calibration of the optical system is effectively improved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an optical system calibration device according to the present invention;
FIG. 2 is a schematic diagram of hardware architecture involved in the operation of an embodiment of an optical system calibration device according to the present invention;
FIG. 3 is a flow chart of an embodiment of an optical system calibration method according to the present invention;
FIG. 4 is a flow chart of another embodiment of the method for calibrating an optical system according to the present invention;
FIG. 5 is a flow chart of a calibration method of an optical system according to another embodiment of the invention;
FIG. 6 is a flowchart of an optical system calibration method according to another embodiment of the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The main solutions of the embodiments of the present invention are: controlling the first laser and the second laser to emit laser along the same optical axis in opposite directions; placing an optical system between the first laser and the second laser, and adjusting the position of the optical system until a preset condition for completing the calibration of the optical system is met; the preset condition includes that a first incident light and a second emergent light are coaxial and/or a second incident light and a first emergent light are coaxial, the first incident light is laser light of the first laser entering the optical system, the first emergent light is light of the first incident light exiting after passing through the optical system, the second incident light is laser light of the second laser entering the optical system, and the second emergent light is light of the second incident light exiting after passing through the optical system.
In the prior art, the optical system is calibrated by emitting unidirectional laser through the laser source, placing the optical device in the optical system in the laser to enable the laser to be emitted after passing through the optical device, arranging a panel on the emitting surface of the optical device to receive the emitting light spot, and calibrating the light path by checking the size of the receiving light spot and whether the laser is incident on the center of the optical device. The optical axis after the optical system is calibrated is easy to deviate from the required optical axis in a large degree by the calibration mode, and especially when more than one optical device exists in the optical system, the optical axis is easy to incline due to the superposition of offset angles of the optical devices, and large errors exist.
The present invention provides the above-described solution for improving the accuracy of optical axis calibration of an optical system.
The embodiment of the invention provides an optical system calibration device which is applied to calibrating an optical axis of an optical system.
The optical system herein may comprise one optical device or more than one optical device. When the optical system comprises an optical device, the optical system calibration device can adjust the optical axis of the optical device to be collinear with a preset optical axis; when the optical system comprises more than one optical device, the optical system calibration device can adjust the optical axes of all the optical devices to be coaxial, and the adjusted optical axes are collinear with the preset optical axis.
When the optical axis calibration device is applied to the optical system, the optical system calibration device is placed on the optical platform.
In the present embodiment, referring to fig. 1 and 2, the optical system calibration device includes a first laser 1, a second laser 2, and a control device 3. The first laser 1 and the second laser 2 are both connected with a control device 3, and the control device 3 can control the operation of the first laser 1 and the second laser 2. Specifically, the control device 3 may be used to control the first laser 1 and the second laser 2 to emit or stop emitting laser light, and the control device 3 may also be used to control the first laser 1 and the second laser 2 to adjust the optical axes of the emitted laser light.
In this embodiment, the color of the laser light emitted by the first laser 1 is different from the color of the laser light emitted by the second laser 2. In other embodiments, the color of the laser light emitted by the first laser 1 may also be the same as the color of the laser light emitted by the second laser 2.
Further, in this embodiment, the optical system calibration device may further include a translucent light target 4 movably disposed between the first laser 1 and the second laser 2. The translucent light target 4 is specifically a plate-like structure made of a translucent material (e.g., translucent glass or translucent plastic plate). In this embodiment, the control device 3 is in driving connection with the translucent light target 4 to control the movement of the translucent light target 4 and to adjust the position of the translucent light target 4. In other embodiments, the translucent light target 4 may also be movably mounted between the first laser 1 and the second laser 2, and the position is adjusted by manual actuation.
In the embodiment of the present application, referring to fig. 2, the control device 3 includes: a processor 1001 (e.g., CPU), a memory 1002, and the like. The components in the control device 3 are connected by a communication bus. The memory 1002 may be a high-speed RAM memory or a stable memory (non-volatile memory), such as a disk memory. The memory 1002 may alternatively be a storage device separate from the processor 1001 described above.
It will be appreciated by those skilled in the art that the device structure shown in fig. 2 is not limiting of the device and may include more or fewer components than shown, or certain components may be combined, or a different arrangement of components.
As shown in fig. 2, an optical system calibration program may be included in a memory 1002 as a computer-readable storage medium. In the apparatus shown in fig. 2, a processor 1001 may be used to call an optical system calibration program stored in a memory 1002 and perform the relevant step operations of the optical system calibration method in the following embodiments.
The embodiment of the application also provides an optical system calibration method which is applied to the optical system calibration device.
Referring to fig. 3, an embodiment of an optical system calibration method according to the present application is provided. In this embodiment, the optical system calibration method includes:
Step S10, controlling the first laser and the second laser to face each other and emit laser along the same optical axis;
specifically, the first laser emits laser light toward the second laser, and the second laser emits laser light toward the first laser. The laser light emitted by the first laser and the laser light emitted by the second laser are coaxial, and the optical axes of the emitted light of the first laser and the emitted light of the second laser can be a preset fixed optical axis or any optical axis (for example, the optical axis of one optical device in an optical system).
In this embodiment, the laser light emitted by the first laser and the laser light emitted by the second laser have different colors. Specifically, the first laser emits red light and the second laser emits green light. Alternatively, the first laser emits blue light and the second laser emits yellow light. The first laser and the second laser emit lasers with different colors, so that judging efficiency of whether the identification position meets the preset condition or not in the subsequent adjustment process of the position of the optical system is improved effectively. In other embodiments, the first laser and the second laser may also emit light having the same color.
Step S20, an optical system is placed between the first laser and the second laser, and the position of the optical system is adjusted until the preset condition that the optical system is calibrated is met;
the preset condition includes that a first incident light and a second emergent light are coaxial and/or a second incident light and a first emergent light are coaxial, the first incident light is laser light of the first laser entering the optical system, the first emergent light is light of the first incident light exiting after passing through the optical system, the second incident light is laser light of the second laser entering the optical system, and the second emergent light is light of the second incident light exiting after passing through the optical system.
The optical system may comprise one optical device or more than one optical device. In this embodiment, the optical device is a lens (e.g., a convex lens and/or a concave lens), and in other embodiments, the optical device may be any optical element having an optical axis.
The process of placing the optical system between the first laser and the second laser and the process of adjusting the position can be manually controlled, or the optical system can be in driving connection with a control device, and the position of the optical system is controlled by the control device.
In the process of placing the optical system between the first laser and the second laser, the area where the optical center (for example, the lens center) of the optical system is located is aligned with the laser light emitted by the first laser and the second laser. Specifically, whether the area where the optical center is located is aligned with the laser or not can be judged through observation of human eyes, a preset instruction is input after the human eyes determine the alignment, and when the preset instruction is received, the area where the optical center of the optical system is located can be determined to be irradiated by the laser emitted by the first laser and the laser emitted by the second laser. Or, whether the area where the optical center is located is aligned with the laser light can also be determined by detecting a first position parameter of the optical axis where the laser light emitted by the first laser and the second laser is located, detecting a position parameter range corresponding to the area where the optical center is located in the moving process of the optical system, and if the first position parameter is located in the position parameter range, determining that the laser light emitted by the first laser and the laser light emitted by the second laser are both irradiated to the area where the optical center of the optical system is located. After determining that the laser light emitted by the first laser and the laser light emitted by the second laser both impinge on an area where an optical center of the optical system is located, a position of an optical device currently placed between the first laser and the second laser may be adjusted to calibrate an optical axis of the optical device.
Where the optical system includes more than one optical device, the more than one optical device may be placed between the first laser and the second laser simultaneously or sequentially. Specifically, after all optical devices in the optical system are placed between the first laser and the second laser, the position of the optical system can be adjusted; or a part of optical devices in the optical system are firstly arranged between the first laser and the second laser, after the part of optical devices are adjusted to meet the preset condition, another part of optical devices in the optical system are arranged between the first laser and the second laser, and then the optical devices between the first laser and the second laser are adjusted to meet the preset condition.
In this embodiment, in order to further improve the accuracy of the optical system calibration, the preset condition includes that the first incident light is coaxial with the second outgoing light and the second incident light is coaxial with the first outgoing light. In other embodiments, in order to achieve an effective compromise between accuracy and efficiency of the optical system calibration, the preset condition may also include one of a first condition and a second condition, where the first condition is that the first incident light is coaxial with the second emergent light, and the second condition is that the second incident light is coaxial with the first emergent light.
Adjusting the position of the optical system specifically includes adjusting a sub-position of the optical system in several directions (one or more than one direction). And judging whether the adjusted optical system meets the preset condition or not after finishing the position adjustment of the optical system once, if not, continuing to adjust the position of the optical system, and if so, judging that the calibration of the optical system is finished.
Whether the current position of the optical system meets the preset condition or not can be judged manually or can be identified by a machine. For example, when the first laser and the second laser reach the visualization requirement in the environment where the first laser and the second laser are located, whether the first incident light and the second emergent light are coaxial and/or whether the second incident light and the first emergent light are coaxial can be observed through human eyes so as to judge whether the current position of the optical system meets the preset condition; or the images of the areas where the first laser and the second laser are located can be obtained, the image positions corresponding to the first incident light, the first emergent light, the second incident light and the second emergent light in the images are identified, whether the first incident light and the second emergent light are coaxial or not and/or whether the second incident light and the first emergent light are coaxial or not is determined according to the deviation value between the identified image positions, so that whether the current position of the optical system meets the preset condition or not is judged. When the position of the optical system is controlled by the control device to be adjusted, a user can output an ending command when the current position of the optical system is judged to meet the preset condition by the eyes of the user, and the control device stops the position adjustment of the optical system when receiving the ending command.
When the position of the optical system satisfies the preset condition, it is indicated that the preset optical axes where the first laser and the second laser emit light (i.e., the optical axes where the optical system is not placed between the first laser and the second laser after step S10) coincide with the optical axes of the current optical system, and the optical axes of the more than one optical devices when the more than one optical device is present in the optical system are all coaxial.
According to the method for calibrating the optical system, laser is emitted along the same optical axis in opposite directions by the two lasers, the optical system is placed between the two lasers and is adjusted on the basis of the laser emission, the preset condition is that the emergent light of the laser emitted by the first laser after passing through the optical system is coaxial with the laser emitted by the second laser, and/or the emergent light of the laser emitted by the second laser after passing through the optical system is coaxial with the laser emitted by the first laser, and the optical axis of the optical system after calibration can be consistent with the optical axis before the two lasers are placed in the optical system by means of double-laser calibration instead of single-laser calibration, so that the optical axis after the optical system is calibrated is ensured to be consistent with the required optical axis, and the optical axis inclination cannot occur, and the accuracy of the optical axis calibration of the optical system is effectively improved.
Further, based on the above embodiment, another embodiment of the optical system calibration method of the present application is provided. In this embodiment, the optical system includes at least two optical devices, and in this embodiment, the optical devices are lenses, and referring to fig. 4, the step S20 includes:
step S21, determining a target optical device of the at least two optical devices; the target optics are optics that are not placed between the first laser and the second laser;
in this embodiment, the number of target optical devices is one, and one optical device, which is not placed between the first laser and the second laser, of the at least two optical devices is taken as the target optical device. In other embodiments, the number of target optics may also be more than one, such as two, etc.
Step S22, placing the target optics between the first laser and the second laser;
the optical system is placed between the first laser and the second laser such that the area where the optical center (e.g., the lens center) of the optical device is located is aligned with the laser light emitted by the first laser and the second laser. The specific manner of determining whether the optical center is located in the area aligned with the laser can be analogized to the above embodiment, and will not be described herein.
Step S23, adjusting the position of the target optical device until the first sub incident light and the second sub emergent light are coaxial and the second sub incident light and the first sub emergent light are coaxial; the first sub-incident light is the laser light of the first laser entering the target optical device, the first sub-emergent light is the light emitted by the first sub-incident light after passing through the target optical device, the second sub-incident light is the laser light of the second laser entering the target optical device, and the second sub-emergent light is the light emitted by the second sub-incident light after passing through the target optical device;
the first sub-incident light and the second sub-emergent light being coaxial and the second sub-incident light and the first sub-emergent light being coaxial indicates that the optical axis alignment of the target optical device is completed.
Adjusting the position of the target optic specifically includes adjusting a sub-position of the target optic in a number of directions (one or more than one direction). And if the first sub-incident light and the second sub-emergent light are coaxial, the position of the target optical device is continuously adjusted, and if the first sub-incident light and the second sub-emergent light are not coaxial, the calibration of the target optical device is considered to be completed. Whether the position of the target optical device satisfies that the first sub incident light and the second sub emergent light are coaxial and the second sub incident light and the first sub emergent light are coaxial or not can be judged manually or identified by a machine. For example, when the first laser and the second laser reach the visualization requirement in the environment where the first laser and the second laser are located, whether the first incident light and the second emergent light are coaxial or not and whether the second incident light and the first emergent light are coaxial or not can be observed through human eyes, so as to judge whether the current position of the target optical device meets the condition of completing calibration or not. Or the images of the areas where the first laser and the second laser are located can be obtained, the image positions corresponding to the first sub-incident light, the first sub-emergent light, the second sub-incident light and the second sub-emergent light in the images are identified, whether the first sub-incident light and the second sub-emergent light are coaxial or not and/or whether the second sub-incident light and the first sub-emergent light are coaxial or not is determined according to the deviation value between the identified image positions, so as to judge whether the current position of the target optical device meets the condition of calibration completion or not. When the position of the target optical device is controlled by the control device to be adjusted, a user can output an ending command when the human eyes judge that the current position of the target optical device meets the preset condition, and the control device stops the position adjustment of the target optical device when receiving the ending command.
Step S24, returning to the step of determining the target optical device of the at least two optical devices until the at least two optical devices are all located between the first laser and the second laser and the preset condition is satisfied.
Based on this, all the optical devices in the optical system are placed between the first laser and the second laser, and the position of each optical device reaches the condition that the calibration is completed, the preset condition that the calibration of the optical system is completed can be considered to be satisfied.
In this embodiment, the optical devices in the optical system can be calibrated in batches or even one by one in the above manner, and after the optical device of one batch is put into the optical system before the optical device of the other batch is calibrated, the optical system with more than one optical device can be further improved in accuracy, and the optical axes of all the optical devices in the optical system are guaranteed to be collinear after the calibration is completed.
Further, based on any of the above embodiments, another embodiment of the optical system calibration method of the present application is provided. In this embodiment, referring to fig. 5, the step of adjusting the position of the optical system until a preset condition for completing the calibration of the optical system is satisfied includes:
Step S201, a light target is placed between the first laser and the optical system in a first target state, wherein the first target state is that a light spot formed on the light target by the first laser coincides with a preset identification position on the light target;
whether the optical target is placed between the first laser and the optical system in the first target state or not can be determined according to an instruction input by a user after judgment by human eyes; the image of the light target can also be obtained, and the light target can be determined to be placed between the first laser and the optical system in a first target state when the first image position and the second image position overlap by identifying the first image position corresponding to the preset identification position on the image of the light target and the second image position of the light target formed by the first laser.
Step S202, adjusting the position of the optical system until the light spot formed by the second laser on the optical target coincides with the preset identification position;
in this embodiment, the light target is a structure made of semitransparent material; in other embodiments, the light target may be made of transparent material or light shielding material.
In this embodiment, the preset identification position is the center of the optical target; in other embodiments, the preset mark position may be an edge position of the light target or other positions.
The recognition mode of whether the light spot formed by the second laser on the optical target coincides with the preset identification position can be analogous to the judgment process of whether the optical target is placed between the first laser and the optical system in the first target state, and will not be described herein.
When the position adjustment of the optical system is finished once, whether the light spot formed on the optical target by the adjusted second laser is overlapped with the preset identification position or not can be judged, if so, the light spots formed on the optical target by the first laser and the second laser are considered to be overlapped, and then the first incident light and the second emergent light are coaxial; if the first and second lasers are not overlapped, the light spots formed on the light targets by the first and second lasers are not overlapped, and the first incident light and the second emergent light are not coaxial.
Step S203, placing the optical target between the second laser and the optical system in a second target state, where the second target state is that a light spot formed by the second laser on the optical target coincides with a preset identification position on the optical target;
and step S204, adjusting the position of the optical system until the light spot formed by the first laser on the light target coincides with the preset identification position.
The specific implementation process of step S203 and step S204 can be analogized to the relevant content of step S201 and step S202, and will not be described herein.
It should be noted that, when the optical system includes at least two optical devices, whether the first incident sub-light, the first emergent sub-light, the second incident sub-light, and the second emergent sub-light corresponding to each optical device reach the condition that the position adjustment of the optical devices is finished may be determined by whether the first incident sub-light, the first emergent sub-light, the second incident sub-light, and the second emergent sub-light overlap with each other through the optical target provided with the preset identification position, the light spot formed on the optical target by the laser emitted by one of the lasers, and the light spot formed on the optical target by the emergent light of the other laser after passing through the optical devices, which are not described herein.
In this embodiment, by determining whether the light spots formed by the two lasers on the light target overlap under the light guiding effect of the optical system by means of the light target in the above manner, accurate determination of whether the current position of the optical system meets the preset condition is realized, visualization of optical axis calibration is facilitated, quantification of the size and the position shape of the light spots in the optical axis calibration process is ensured, and therefore the accuracy of optical axis calibration of the optical system is further improved.
Further, in other embodiments, step S20 may also include step S201 and step S202 without step S203 and step S204; alternatively, in other embodiments, step S20 may also include step S203 and step S204 instead of step S201 and step 202.
Further, based on any of the above embodiments, another embodiment of the optical system calibration method of the present application is provided. In this embodiment, referring to fig. 6, the step S10 includes:
step S11, controlling the first laser to emit laser light towards the second laser, and controlling the second laser to emit laser light towards the first laser;
step S12, placing an optical target between the first laser and the second laser at least at two positions, and adjusting the first laser and/or the second laser so that a first light spot and a second light spot corresponding to each of the at least two positions are overlapped with a preset identification position of the optical target; the first light spot is a light spot formed by the first laser on the optical target, and the second light spot is a light spot formed by the second laser on the optical target.
Specifically, when the first light spot is not coincident with the preset identification position, the first laser can be adjusted; when the second light spot is not overlapped with the preset mark position, the second laser can be adjusted; when the first light spot and the second light spot are not coincident with the preset identification position, the first laser and the second laser can be adjusted.
The at least two positions may be any selected positions, or may be a plurality of positions satisfying a certain condition. The number of the at least two positions can be set according to actual requirements.
In this embodiment, the preset identification position is the center of the optical target; in other embodiments, the preset mark position may be an edge position of the light target or other positions.
Whether the first light spot and the second light spot coincide with the preset identification position or not can be determined by inputting corresponding state instructions after human eyes judge, and can also be identified by images.
In this embodiment, the position of the optical target is changed by moving between the first laser and the second laser, so that the light spots formed by the two lasers overlap when the optical target is at different positions, thereby ensuring that the laser beams emitted by the two lasers are coaxial, and being beneficial to further improving the accuracy of optical axis calibration of the subsequent optical system.
Further, in this embodiment, the at least two positions include a first position and a second position, a distance between the first position and the first laser is smaller than a distance between the second position and the second laser, and a distance between the second position and the first laser is smaller than a distance between the first position and the second laser, and step S12 includes:
Placing the optical target at the first position in a third target state, wherein the third target state is that the first light spot coincides with a preset identification position on the optical target; adjusting the second laser until the second light spot coincides with the preset mark position; placing the light target at the second position in a fourth target state, wherein the fourth target state is that the second light spot coincides with the preset identification position; and adjusting the first laser until the first light spot coincides with the preset identification position.
The laser emitted by the second laser is adjusted by placing the optical target at a position close to the first laser, and the laser emitted by the first laser is adjusted by placing the optical target at a position close to the second laser after the second laser is adjusted.
Further, in this embodiment, the at least two positions further include a plurality of third positions between the first laser and the second laser, except for the first position and the second position, and after the step of adjusting the first laser until the first light spot coincides with the preset identification position, the method further includes: and moving the optical target to each third position and adjusting the first laser and/or the second laser so that the first light spot and the second light spot corresponding to each third position coincide with the preset identification position.
The number of third locations may be one or more than one. The number of third positions may in particular be determined by the distance between the first and second lasers, the type of optics in the optical system (e.g. convex or concave lenses etc.), the optical characteristics (e.g. focal length and/or thickness etc.), and/or the total number.
After laser adjustment of the lasers is completed at positions close to the two lasers respectively, the optical target is moved to at least one third position, fine adjustment is further carried out on the two lasers, so that the first light spot and the second light spot corresponding to each third position are overlapped with the preset identification position, and the shape and the size of the first light spot and the second light spot corresponding to each third position are the same.
And combining the light spots on the light targets at the first position, the second position and the third positions to accurately perform two lasers, so that the lasers emitted by the two lasers are ensured to be coaxial accurately, and the accuracy of optical axis calibration of an optical system is further improved.
In addition, the embodiment of the invention also provides a computer readable storage medium, wherein the computer readable storage medium stores an optical system calibration program, and the optical system calibration program realizes the relevant steps of any embodiment of the optical system calibration method when being executed by a processor.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
From the above description of the embodiments, it will be clear to those skilled in the art that the above-described embodiment method may be implemented by means of software plus a necessary general hardware platform, but of course may also be implemented by means of hardware, but in many cases the former is a preferred embodiment. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (e.g. ROM/RAM, magnetic disk, optical disk) as described above, comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an optical system calibration device, or a network device, etc.) to perform the method according to the embodiments of the present invention.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.
Claims (10)
1. An optical system calibration method, characterized in that the optical system calibration method comprises the steps of:
controlling the first laser and the second laser to emit laser along the same optical axis in opposite directions;
placing an optical system between the first laser and the second laser, and adjusting the position of the optical system until a preset condition for completing the calibration of the optical system is met;
the preset condition includes that a first incident light and a second emergent light are coaxial and/or a second incident light and a first emergent light are coaxial, the first incident light is laser light of the first laser entering the optical system, the first emergent light is light of the first incident light exiting after passing through the optical system, the second incident light is laser light of the second laser entering the optical system, and the second emergent light is light of the second incident light exiting after passing through the optical system.
2. The method of calibrating an optical system according to claim 1, wherein the optical system includes at least two optical devices, and the step of positioning the optical system between the first laser and the second laser and adjusting the position of the optical system until the first incident light is coaxial with the second outgoing light and the second incident light is coaxial with the first outgoing light includes:
determining a target optic of the at least two optics; the target optics are optics that are not placed between the first laser and the second laser;
placing the target optic between the first laser and the second laser;
adjusting the position of the target optical device until the first sub-incident light and the second sub-emergent light are coaxial and the second sub-incident light and the first sub-emergent light are coaxial;
returning to the step of determining a target one of the at least two optics until the at least two optics are all located between the first laser and the second laser and the preset condition is met;
the first sub-incident light is the laser light of the first laser incident on the target optical device, the first sub-emergent light is the light emitted by the first sub-incident light after passing through the target optical device, the second sub-incident light is the laser light of the second laser incident on the target optical device, and the second sub-emergent light is the light emitted by the second sub-incident light after passing through the target optical device.
3. The optical system calibration method according to claim 1, wherein the step of adjusting the position of the optical system until a preset condition for completion of the optical system calibration is satisfied comprises:
placing an optical target between the first laser and the optical system in a first target state, wherein the first target state is that a light spot formed on the optical target by the first laser coincides with a preset identification position on the optical target;
adjusting the position of the optical system until the light spot formed by the second laser on the light target coincides with the preset identification position;
and/or placing the optical target between the second laser and the optical system in a second target state, wherein the second target state is that a light spot formed by the second laser on the optical target coincides with a preset identification position on the optical target;
and adjusting the position of the optical system until the light spot formed by the first laser on the light target coincides with the preset identification position.
4. The method of calibrating an optical system according to claim 1, wherein the laser light emitted from the first laser and the laser light emitted from the second laser have different colors.
5. The optical system calibration method according to any one of claims 1 to 4, wherein the step of controlling the first laser and the second laser to emit laser light toward each other and along the same optical axis includes:
controlling the first laser to emit laser light towards the second laser, and controlling the second laser to emit laser light towards the first laser;
placing an optical target between the first laser and the second laser at least at two positions, and adjusting the first laser and/or the second laser so that a first light spot and a second light spot corresponding to each of the at least two positions coincide with a preset identification position of the optical target;
the first light spot is a light spot formed by the first laser on the optical target, and the second light spot is a light spot formed by the second laser on the optical target.
6. The method of calibrating an optical system according to claim 5, wherein the at least two positions include a first position and a second position, the first position being spaced from the first laser by a distance less than the second position being spaced from the second laser, the second position being spaced from the first laser by a distance less than the first position being spaced from the second laser, the step of placing an optical target between the first laser and the second laser at least two positions, and adjusting the first laser and/or the second laser such that the first spot and the second spot corresponding to each of the at least two positions coincide with a preset identification position of the optical target includes:
Placing the optical target at the first position in a third target state, wherein the third target state is that the first light spot coincides with a preset identification position on the optical target;
adjusting the second laser until the second light spot coincides with the preset mark position;
placing the light target at the second position in a fourth target state, wherein the fourth target state is that the second light spot coincides with the preset identification position;
and adjusting the first laser until the first light spot coincides with the preset identification position.
7. The method of calibrating an optical system according to claim 6, wherein the at least two positions further include a plurality of third positions between the first laser and the second laser other than the first position and the second position, and the adjusting the first laser until the first spot coincides with the preset mark position further includes, after the step of:
and moving the optical target to each third position and adjusting the first laser and/or the second laser so that the first light spot and the second light spot corresponding to each third position coincide with the preset identification position.
8. An optical system calibration device, characterized in that the optical system calibration device comprises:
a first laser;
a second laser;
the control device, first laser instrument with the second laser instrument all with controlling means is connected, controlling means includes: a memory, a processor and an optical system calibration program stored on the memory and executable on the processor, which when executed by the processor, performs the steps of the optical system calibration method of any one of claims 1 to 7.
9. The optical system alignment device of claim 8, further comprising a translucent light target movably disposed between the first laser and the second laser.
10. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon an optical system calibration program, which when executed by a processor, implements the steps of the optical system calibration method according to any one of claims 1 to 7.
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