CN109883360B - Angle measuring method and device applied to optical system - Google Patents
Angle measuring method and device applied to optical system Download PDFInfo
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- CN109883360B CN109883360B CN201910247458.XA CN201910247458A CN109883360B CN 109883360 B CN109883360 B CN 109883360B CN 201910247458 A CN201910247458 A CN 201910247458A CN 109883360 B CN109883360 B CN 109883360B
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- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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Abstract
The application discloses an angle measuring method and a measuring device applied to an optical system, wherein the optical system comprises a lens and a display screen, the display screen comprises a test mark, and the test mark comprises a first mark and a second mark; the angle measurement method comprises the following steps: acquiring a first spacing distance between a first mark and a second mark; acquiring a first optical signal of the first marker and a second optical signal of the second marker; obtaining a first height value from the first optical signal and a second height value from the second optical signal; and obtaining a first included angle between the lens and the display screen according to the first height value, the second height value and the first spacing distance. The application provides an angle measuring method and device applied to an optical system, and aims to solve the problems that in the prior art, the included angle between a lens and a display screen in the optical system cannot be directly measured, so that the assembling quality of the optical system cannot be controlled, and the assembling quality is poor.
Description
Technical Field
The present disclosure relates to optical measurement technologies, and in particular, to an angle measurement method and an angle measurement apparatus for an optical system.
Background
Virtual Reality (VR) technology is a high-level man-machine interaction technology that comprehensively applies various technologies to create a realistic artificial simulation environment and can effectively simulate various perception system behaviors of people in a natural environment. Mainly by lens, display screen and structure component among the VR optical system, wherein, the imaging quality of optical system is directly influenced to the equipment position relation of lens and display screen, and lens and display screen can have the contained angle error usually in the equipment process, and this contained angle error can't directly measure to in optical system equipment process, can't manage and control the equipment quality, lead to optical system's equipment quality relatively poor.
Disclosure of Invention
The application provides an angle measuring method and device applied to an optical system, and aims to solve the problems that in the prior art, the included angle between a lens and a display screen in the optical system cannot be directly measured, so that the assembling quality of the optical system cannot be controlled, and the assembling quality is poor.
In order to achieve the above object, the present application provides an angle measurement method applied to an optical system, where the optical system includes a lens and a display screen, the display screen includes a test mark, and the test mark includes a first mark and a second mark that are symmetrically arranged along a first direction with a center of the display screen as a center; the angle measuring method applied to the optical system comprises the following steps:
acquiring a first spacing distance between the first mark and the second mark;
acquiring a first optical signal of the first marker and a second optical signal of the second marker;
obtaining a first height value from the first optical signal and a second height value from the second optical signal;
and obtaining a first included angle between the lens and the display screen according to the first height value, the second height value and the first spacing distance.
Optionally, the test marks further include a third mark and a fourth mark symmetrically arranged along a second direction with the center of the display screen as a center, where the first direction intersects with the second direction and is parallel to the display screen, and the angle measurement method applied to the optical system further includes:
acquiring a second spacing distance between the third mark and the fourth mark;
acquiring a third optical signal of the third marker and a fourth optical signal of the fourth marker;
obtaining a third height value from the third optical signal and a fourth height value from the fourth optical signal;
obtaining a second included angle between the lens and the display screen according to the third height value and the fourth height value;
and obtaining a third included angle between the lens and the display screen according to the first included angle and the second included angle.
Optionally, the first direction and the second direction are perpendicular to each other.
Optionally, the first separation distance is equal to the second separation distance.
Optionally, the obtaining a first height value from the first optical signal and a second height value from the second optical signal includes:
performing continuous picture acquisition on the first optical signal and the second optical signal;
acquiring the definition of a plurality of acquired pictures, and determining the acquired picture with the highest definition;
acquiring a first virtual image distance and a second virtual image distance according to the acquired picture with the highest definition;
and obtaining the first height value according to the first virtual image distance and obtaining the second height value according to the second virtual image distance.
Optionally, the obtaining the first height value according to the first virtual image distance and the obtaining the second height value according to the second virtual image distance includes:
establishing a functional relation between the virtual image distance and the height value;
and obtaining the first height value according to the functional relation and the first virtual image distance, and obtaining the second height value according to the functional relation and the second virtual image distance.
Optionally, the obtaining a first included angle between the lens and the display screen according to the first height value, the second height value, and the first separation distance includes:
acquiring a first height difference value of the first height value and the second height value;
acquiring a first proportional value of the first height difference value and the first spacing distance;
and acquiring an arc tangent function value of the first proportional value, and acquiring the first included angle according to the arc tangent function value of the first proportional value.
Optionally, the obtaining a second included angle between the lens and the display screen according to the third height value and the fourth height value includes:
acquiring a second height difference value of the third height value and the fourth height value;
acquiring a second proportional value of the second height difference value and the second spacing distance;
and acquiring an arc tangent function value of the second proportional value, and acquiring the second included angle according to the arc tangent function value of the second proportional value.
Optionally, the obtaining a third included angle between the lens and the display screen according to the first included angle and the second included angle includes:
obtaining a first direction vector in the first plane according to the first included angle;
obtaining a second direction vector on the second plane according to the second included angle;
and obtaining the third included angle according to the first direction vector and the second direction vector.
In order to achieve the above object, the present application provides an angle measuring device applied to an optical system, where the optical system includes a lens and a display screen, the display screen includes a test mark, and the test mark includes a first mark and a second mark; the angle measuring device applied to the optical system comprises an acquisition unit and a controller, wherein the controller is used for acquiring a first spacing distance between the first mark and the second mark; the acquisition unit is arranged on one side of the lens, which is far away from the display screen, and is used for acquiring the optical signal of the test mark; the acquisition unit sends the optical signal to the controller, and the controller is further configured to obtain a first height value according to the first optical signal, obtain a second height value according to the second optical signal, and obtain a first included angle between the lens and the display screen according to the first height value, the second height value, and the first separation distance.
Optionally, the acquisition unit comprises:
the lens module is used for receiving the light rays emitted by the test mark and focusing the light rays;
the sensor is used for receiving optical signals of light rays which are sent by the test marks and focused by the lens module; wherein the optical signal comprises the first optical signal of the first marker and the second optical signal of the second marker;
and the control unit is used for adjusting the distance between the lens module and the sensor and controlling the sensor to carry out continuous picture acquisition on the optical signal.
In the technical scheme that this application provided, optical system includes lens and display screen, the display screen marks including the test, the test mark including with the display screen center is central, marks with the second along the first mark that symmetry set up on the first direction, through acquireing first mark with the second marks the optical signal who sends, confirms first mark distance the first height value of lens and the second marks the distance the second height value of lens, according to first height value the second height value and first mark with the second marks first interval distance between, and application trigonometric function formula is confirmed lens with the first contained angle of display screen. Through acquireing on the display screen first mark with the optical signal that the second was marked calculates lens with relative contained angle between the display screen to solve among the prior art and can't carry out direct measurement to the contained angle of lens among the optical system and display screen, lead to the unable management and control of optical system equipment quality, the relatively poor problem of equipment quality.
Drawings
In order to more clearly illustrate the embodiments of the present application 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, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic flow chart illustrating an angle measuring method applied to an optical system according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating an angle measuring method applied to an optical system according to another embodiment of the present invention;
FIG. 3 is a schematic flow chart illustrating an angle measuring method applied to an optical system according to another embodiment of the present invention;
FIG. 4 is a schematic flowchart of an angle measurement method applied to an optical system according to another embodiment of the present invention;
FIG. 5 is a schematic flowchart of an angle measurement method applied to an optical system according to another embodiment of the present invention;
FIG. 6 is a flowchart illustrating an angle measuring method applied to an optical system according to another embodiment of the present invention.
The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that all the directional indications (such as up, down, left, right, front, and rear … …) in the embodiment of the present application are only used to explain the relative position relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indication is changed accordingly.
In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In addition, technical solutions between the various embodiments of the present application may be combined with each other, but it must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should be considered to be absent and not within the protection scope of the present application.
The application provides an angle measuring method and an angle measuring device applied to an optical system.
Referring to fig. 1, the optical system includes a lens and a display screen, the display screen includes a test mark, and the test mark includes a first mark and a second mark symmetrically arranged along a first direction with a center of the display screen as a center; the angle measuring method applied to the optical system comprises the following steps:
s100, acquiring a first interval distance between the first mark and the second mark;
the distance between the first mark and the center of the display screen is half of the first spacing distance, and the distance between the second mark and the center of the display screen is half of the first spacing distance.
S200, acquiring a first optical signal of the first marker and a second optical signal of the second marker;
the first optical signal and the second optical signal can be a single color or a combination of multiple colors.
S300, obtaining a first height value according to the first optical signal and obtaining a second height value according to the second optical signal;
the first height value is the distance between the first mark and the lens along the normal direction of the display screen, and the second height value is the distance between the second mark and the lens along the normal direction of the display screen.
S400, obtaining a first included angle between the lens and the display screen according to the first height value, the second height value and the first spacing distance;
the first plane is parallel to the first direction and perpendicular to the plane where the display screen is located, and the first included angle is an included angle between the lens and the display screen on the first plane.
In the technical scheme that this application provided, optical system includes lens and display screen, the display screen marks including the test, the test mark including with the display screen center is central, marks with the second along the first mark that symmetry set up on the first direction, through acquireing first mark with the second marks the optical signal who sends, confirms first mark distance the first height value of lens and the second marks the distance the second height value of lens, according to first height value the second height value and first mark with the second marks first interval distance between, and application trigonometric function formula is confirmed lens with the first contained angle of display screen. Through acquireing on the display screen first mark with the optical signal that the second was marked calculates lens with relative contained angle between the display screen to solve among the prior art and can't carry out direct measurement to the contained angle of lens among the optical system and display screen, lead to the unable management and control of optical system equipment quality, the relatively poor problem of equipment quality.
Referring to fig. 2, the test mark further includes a third mark and a fourth mark symmetrically arranged along a second direction with a center of the display screen as a center, wherein the first direction intersects with the second direction and is parallel to the display screen, and the angle measurement method applied to the optical system further includes:
s500, acquiring a second spacing distance between the third mark and the fourth mark;
and the distance between the third mark and the center of the display screen is half of the fourth spacing distance, and the distance between the fourth mark and the center of the display screen is half of the fourth spacing distance.
S600, acquiring a third optical signal of the third marker and a fourth optical signal of the fourth marker;
the third optical signal and the fourth optical signal can be a single color or a combination of multiple colors.
S700, obtaining a third height value according to the third optical signal and obtaining a fourth height value according to the fourth optical signal;
the third height value is the distance between the third mark and the lens along the normal direction of the display screen, and the fourth height value is the distance between the fourth mark and the lens along the normal direction of the display screen.
S800, obtaining a second included angle between the lens and the display screen according to the third height value and the fourth height value;
the second plane is parallel to the second direction and perpendicular to the plane where the display screen is located, and the second included angle is an included angle between the lens and the display screen on the second plane.
And S900, obtaining a third included angle between the lens and the display screen according to the first included angle and the second included angle.
And the third included angle is a relative included angle between the lens and the display screen.
In some alternative embodiments, the first plane intersects the second plane. When the central axis of the lens is intersected with the first plane, the included angle between the lens and the display screen cannot be accurately determined through the first included angle obtained by the first height value, the second height value and the first interval distance. Therefore, the second measurement is performed on the lens in the second direction, wherein the first direction is intersected with the second direction, and after the second included angle is obtained, a third included angle between the lens and the display screen is obtained through the first included angle and the second included angle of the lens.
Preferably, the first direction is perpendicular to the second direction, in a specific embodiment, the first plane, the second plane and a plane where the display screen is located are perpendicular to each other two by two, and when the first direction is perpendicular to the second direction, a user can calculate the first included angle and the second included angle conveniently.
Preferably, first interval distance with second interval distance equals, and in the embodiment, the light process that test on the display screen was marked and is sent is the parallel light after the lens transmission, and the parallel light of the position outgoing of different display screen image points is different with the contained angle of lens optical axis, and an angle after the lens outgoing corresponds to an outgoing angle, and the image point that is close to lens optical axis and display screen projected position more, the inclination of outgoing light and optical axis is less. The first and second included angles α and β need to be considered in the calculation process. Because the distance between the test marks is associated with the inclination angle of the acquisition unit, when the first spacing distance is equal to the second spacing distance, the calculation process of the first included angle associated with the first spacing distance can be simplified, and the calculation process of the second included angle associated with the second spacing distance can be simplified, so that the angle measurement difficulty of the optical system is reduced.
Referring to fig. 3, in some alternative embodiments, the step S300 includes:
s310, carrying out continuous picture acquisition on the optical signal sent by the test mark;
s320, acquiring the definition of the plurality of acquired pictures, and determining the acquired picture with the highest definition;
the method for determining the picture with the highest definition comprises the steps of obtaining an imaging modulation transfer function value of the collected picture, evaluating the definition of the collected picture through the imaging modulation transfer function value of the collected picture, and when the imaging modulation transfer function value is the highest, obtaining the picture with the highest definition.
S330, acquiring a first virtual image distance and a second virtual image distance according to the acquired picture with the highest definition;
s340, obtaining the first height value according to the first virtual image distance and obtaining the second height value according to the second virtual image distance.
The controller controls the acquisition unit to continuously scan and photograph the first optical signal passing through the first mark and the second optical signal passing through the second mark, and records a control focal length of the acquisition unit corresponding to the acquired picture. Determining the acquired picture with the highest definition according to the acquired definitions of the acquired pictures; and finally, acquiring the first virtual image distance and the second virtual image distance according to the acquired picture with the highest definition.
In a specific embodiment, the collecting unit is a CCD camera, and the collecting unit includes a sensor, a lens module and a control unit, wherein the sensor is a CCD image sensor, and the CCD image sensor can receive an optical signal in a specific direction, so that when the collecting unit obtains the first optical signal and the second optical signal, the collecting unit needs to rotate to a direction the same as the optical signal. Preferably, since the distance between the test marks is related to the tilt angle of the collecting unit, when the first distance is not equal to the second distance, the collecting unit needs to adjust different tilt angles when testing different test marks. When the first spacing distance is equal to the second spacing distance, the acquisition unit tests different test marks, the inclination angles of the acquisition unit and the plane where the display screen is located are equal, the acquisition unit can only rotate by taking the normal of the display screen as a rotating shaft, the angle adjustment times of the acquisition unit can be reduced, and the optical system is prevented from adjusting the angle of the acquisition unit for multiple times in the angle measurement process.
It is understood that, in another embodiment, the number of the acquisition units may be multiple, the inclination angles of the multiple acquisition units and the normal direction of the display screen are the same, and each acquisition unit faces to the different test marks. Through a plurality of the collection unit measures jointly, reduces the collection unit is measuring lens with the rotation number of times during the contained angle between the display screen to reduce the angle error that the collection unit produced when rotating.
It is understood that, in another embodiment, the collecting unit is disposed on a side of the lens away from the display screen, and preferably, the collecting unit is disposed at the center of the exit pupil or the center of the diaphragm of the lens.
Referring to fig. 4, in detail, the step S340 includes:
s341, establishing a functional relation between the virtual image distance and the height value;
and S342, obtaining the first height value according to the functional relationship and the first virtual image distance, and obtaining the second height value according to the functional relationship and the second virtual image distance.
In some optional embodiments, when the distance between the lens and the display screen is larger, the virtual image distance is larger, and there is a positive correlation between the distance between the lens and the display screen and the virtual image distance, so that the first height value may be obtained by the first virtual image distance and a functional relationship, and the second height value may be obtained by the second virtual image distance and a functional relationship.
Referring to fig. 5, in some alternative embodiments, the step S400 includes:
s410, acquiring a first height difference value of the first height value and the second height value;
the first height difference value is an absolute value obtained by subtracting the first height value from the second height value.
S420, acquiring a first proportional value of the first height difference value and the first spacing distance;
and S430, obtaining an arc tangent function value of the first proportional value, and obtaining the first included angle according to the arc tangent function value of the first proportional value.
When the optical system acquires the first height value a1 and the second height value a2, and the first separation distance is H1, the first included angle α of the lens along the first direction is
Referring to fig. 6, in some alternative embodiments, the step S800 includes:
s810, acquiring a second height difference value of the third height value and the fourth height value;
and the second height difference value is an absolute value obtained by subtracting the third height value from the fourth height value.
S820, acquiring a second proportional value of the second height difference value and the second spacing distance;
and S830, obtaining an arc tangent function value of the second proportional value, and obtaining the second included angle according to the arc tangent function value of the second proportional value.
Wherein, if the second interval distance is H2 for the third height value a3 and the fourth height value a4, the second included angle β of the lens along the second direction is
In some optional embodiments, the S900 step includes:
the first normal vector and the second normal vector of the plane where the first direction vector and the second direction vector are located are obtained according to the first direction vector and the second direction vector;
and obtaining the third included angle according to the first normal vector and the second normal vector.
Specifically, when the first direction is perpendicular to the second direction, and the first spacing distance is equal to the second spacing distance, the first included angle α is
The second included angle beta is
The normal vector of the plane where the lens is located is (1, tan alpha/tan beta, tan alpha);
then the angle between the lens and the display screen is calculated according to the vector as
In order to achieve the above object, the present application further provides an angle measuring device applied to an optical system, where the optical system includes a lens and a display screen, the display screen includes a test mark, and the test mark includes a first mark and a second mark; the angle measuring device applied to the optical system comprises an acquisition unit and a controller, wherein the controller is used for acquiring a first spacing distance between the first mark and the second mark; the acquisition unit is arranged on one side of the lens, which is far away from the display screen, and is used for acquiring the optical signal of the test mark; the acquisition unit sends the optical signal to the controller, and the controller is further configured to obtain a first height value according to the first optical signal, obtain a second height value according to the second optical signal, and obtain a first included angle between the lens and the display screen according to the first height value, the second height value, and the first separation distance.
Wherein the controller comprises a processor, a memory and a computer program stored on the memory and operable on the processor, and when executed by the processor, the computer program further implements the steps of the control method according to any of the above embodiments.
In some alternative embodiments, the Processor may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, a discrete hardware component, or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The storage may be an internal storage unit of the device, such as a hard disk or a memory of the device. The memory may also be an external storage device of the device, such as a plug-in hard disk, a Smart Media Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), etc. provided on the device. Further, the memory may also include both internal and external storage units of the device. The memory is used for storing the computer program and other programs and data required by the device. The memory may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In some optional embodiments, the acquisition unit comprises: the lens module is used for receiving the light rays emitted by the test mark and focusing the light rays; the sensor is used for receiving optical signals of light rays which are sent by the test marks and focused by the lens module; and the control unit is used for adjusting the distance between the lens module and the sensor and controlling the sensor to carry out continuous picture acquisition on the optical signal. In a specific embodiment, the control unit continuously adjusts a distance between the lens module and the sensor; in the adjustment process, the controller acquires continuous pictures of the first optical signal and the second optical signal, associates the definition of the acquired pictures with the virtual image distance, screens out the acquired pictures with the highest definition, and takes the virtual image distance of the acquired pictures as the virtual image distance corresponding to the test marks.
The above description is only a preferred embodiment of the present application, and not intended to limit the scope of the present application, and all modifications and equivalents of the technical solutions that can be directly or indirectly applied to other related fields without departing from the spirit of the present application are intended to be included in the scope of the present application.
Claims (11)
1. The angle measurement method applied to the optical system is characterized in that the optical system comprises a lens and a display screen, the display screen comprises a test mark, the test mark comprises a first mark and a second mark which are symmetrically arranged along a first direction by taking the center of the display screen as the center, and the first direction is parallel to the display screen; the angle measuring method applied to the optical system comprises the following steps:
acquiring a first spacing distance between the first mark and the second mark;
acquiring a first optical signal of the first marker and a second optical signal of the second marker;
obtaining a first height value according to the first optical signal and obtaining a second height value according to the second optical signal, wherein the first height value is the distance between the first marker and the lens along the normal direction of the display screen, and the second height value is the distance between the second marker and the lens along the normal direction of the display screen;
and obtaining a first included angle between the lens and the display screen according to the first height value, the second height value and the first spacing distance.
2. The angle measurement method applied to an optical system of claim 1, wherein the test marks further include a third mark and a fourth mark symmetrically disposed along a second direction with a center of the display screen as a center, wherein the first direction intersects the second direction and is parallel to the display screen, the angle measurement method applied to an optical system further comprising:
acquiring a second spacing distance between the third mark and the fourth mark;
acquiring a third optical signal of the third marker and a fourth optical signal of the fourth marker;
obtaining a third height value according to the third optical signal and obtaining a fourth height value according to the fourth optical signal, wherein the third height value is the distance between the third marker and the lens along the normal direction of the display screen, and the fourth height value is the distance between the fourth marker and the lens along the normal direction of the display screen;
obtaining a second included angle between the lens and the display screen according to the third height value and the fourth height value;
and obtaining a third included angle between the lens and the display screen according to the first included angle and the second included angle.
3. The angle measurement method applied to an optical system according to claim 2, wherein the first direction and the second direction are perpendicular to each other.
4. The angle measurement method applied to an optical system according to claim 2, wherein the first spaced distance is equal to the second spaced distance.
5. The angle measurement method applied to an optical system according to claim 1, wherein the obtaining a first height value from the first optical signal and a second height value from the second optical signal comprises:
performing continuous picture acquisition on the first optical signal and the second optical signal;
acquiring the definition of a plurality of acquired pictures, and determining the acquired picture with the highest definition;
acquiring a first virtual image distance and a second virtual image distance according to the acquired picture with the highest definition;
and obtaining the first height value according to the first virtual image distance and obtaining the second height value according to the second virtual image distance.
6. The angle measurement method applied to an optical system according to claim 5, wherein the obtaining the first height value from the first virtual image distance and the second height value from the second virtual image distance includes:
establishing a functional relation between the virtual image distance and the height value;
and obtaining the first height value according to the functional relation and the first virtual image distance, and obtaining the second height value according to the functional relation and the second virtual image distance.
7. The angle measurement method applied to an optical system according to claim 1, wherein the obtaining a first angle between the lens and the display screen according to the first height value, the second height value and the first separation distance comprises:
acquiring a first height difference value of the first height value and the second height value;
acquiring a first proportional value of the first height difference value and the first spacing distance;
and acquiring an arc tangent function value of the first proportional value, and acquiring the first included angle according to the arc tangent function value of the first proportional value.
8. The angle measurement method applied to the optical system according to claim 2, wherein the obtaining a second included angle between the lens and the display screen according to the third height value and the fourth height value comprises:
acquiring a second height difference value of the third height value and the fourth height value;
acquiring a second proportional value of the second height difference value and the second spacing distance;
and acquiring an arc tangent function value of the second proportional value, and acquiring the second included angle according to the arc tangent function value of the second proportional value.
9. The angle measurement method applied to the optical system according to claim 2, wherein the first plane, the second plane and the plane where the display screen is located are perpendicular to each other in pairs, the first plane is parallel to the first direction and perpendicular to the plane where the display screen is located, the second plane is parallel to the second direction and perpendicular to the plane where the display screen is located, and the obtaining of the third included angle between the lens and the display screen according to the first included angle and the second included angle comprises:
obtaining a first direction vector in the first plane according to the first included angle;
obtaining a second direction vector on the second plane according to the second included angle;
and obtaining the third included angle according to the first direction vector and the second direction vector.
10. An angle measuring device applied to an optical system is characterized in that the optical system comprises a lens and a display screen, the display screen comprises a test mark, and the test mark comprises a first mark and a second mark; the angle measuring device applied to the optical system comprises an acquisition unit and a controller, wherein the controller is used for acquiring a first spacing distance between the first mark and the second mark; the acquisition unit is arranged on one side of the lens, which is far away from the display screen, and is used for acquiring the optical signal of the test mark; the acquisition unit sends the optical signal to the controller, the controller is further configured to obtain a first height value according to the first optical signal and obtain a second height value according to the second optical signal, wherein the first height value is a distance between the first mark and the lens along a normal direction of the display screen, the second height value is a distance between the second mark and the lens along the normal direction of the display screen, and a first included angle between the lens and the display screen is obtained according to the first height value, the second height value and the first interval distance.
11. The angle measuring apparatus applied to an optical system according to claim 10, wherein the pickup unit includes:
the lens module is used for receiving the light rays emitted by the test mark and focusing the light rays;
the sensor is used for receiving optical signals of light rays which are sent by the test marks and focused by the lens module; wherein the optical signal comprises the first optical signal of the first marker and the second optical signal of the second marker;
and the control unit is used for adjusting the distance between the lens module and the sensor and controlling the sensor to carry out continuous picture acquisition on the optical signal.
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| CN114877827B (en) * | 2022-05-05 | 2024-01-26 | 华北电力科学研究院有限责任公司 | Method and device for determining opening degree of baffle plate in thermal power plant |
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| CN105758337B (en) * | 2014-12-19 | 2018-09-04 | 宁波舜宇光电信息有限公司 | A method of obtaining angle between lens plane and image sensor plane |
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