CN108732712B - Optical path adjustment method and optical path adjustment device - Google Patents

Abstract

The invention discloses an optical path adjustment method and an optical path adjustment device, wherein the optical path adjustment method includes the following steps: acquiring a first included angle between a first imaging beam and a second imaging beam; and determining a second lens according to the first included angle The first offset on the plane perpendicular to the optical axis; the first distance between the position of the first light spot and the position of the second light spot on the imaging plane is obtained; according to the first distance, it is determined that the second lens is perpendicular to the light The second offset on the plane of the axis; according to the first offset and the second offset, the third offset is determined; according to the third offset, the second lens on the plane perpendicular to the optical axis is adjusted position to reduce the first angle and the first distance; compare the first angle and the preset angle, as well as the first distance and the preset distance; when the first angle is less than or equal to the preset angle, the first distance is less than When it is equal to or equal to the preset distance, the current optical path adjustment is ended. The technical scheme of the present invention improves the assembly yield and efficiency of the optical device.

Description

Optical path adjustment method and optical path adjustment device

technical field

The present invention relates to the field of optical technology, in particular to an optical path adjustment method and an optical path adjustment device.

Background technique

In the assembly of optical equipment, the position of each optical element has high precision requirements, especially with the development of technology, the volume of the optical equipment itself is further reduced, resulting in further improvement of assembly precision. When assembling an optical device with multiple optical paths, it is necessary not only to ensure the accuracy of each optical path, but also to ensure that the relative relationship between the optical paths is accurate, so as to ensure the normal synthesis of different light beams. At present, such optical equipment is usually assembled manually or semi-automatically, which is highly dependent on experience, lacks systematicness, and is difficult to ensure accuracy and stability. The assembly yield and assembly efficiency of optical equipment are very low.

SUMMARY OF THE INVENTION

The main purpose of the present invention is to provide an optical path adjustment method, which aims to solve the problems of poor accuracy and stability of multi-path light synthesis in the above-mentioned optical equipment, and to improve the assembly yield and assembly efficiency of the optical equipment.

In order to achieve the above object, the optical path adjustment method proposed by the present invention is used to adjust the optical path in an optical device, and the optical device includes a first light source, a second light source, a first lens and a second lens, and the first lens is located in the On the outgoing light path of the first light source, the second lens is located on the outgoing light path of the second light source;

The optical path adjustment method includes the following steps:

acquiring a first angle between a first imaging beam and a second imaging beam, wherein the first imaging beam originates from the first light source, and the second imaging beam originates from the second light source;

determining a first offset of the second lens on a plane perpendicular to the optical axis according to the first included angle;

Obtain the first distance between the position of the first light spot and the position of the second light spot on the imaging plane, wherein the first light spot is formed by the first imaging beam on the imaging plane, and the second light spot is formed by the second imaging beam is formed on the imaging plane;

determining a second offset of the second lens on a plane perpendicular to the optical axis according to the first distance;

determining a third offset according to the first offset and the second offset;

Adjust the position of the second lens on a plane perpendicular to the optical axis according to the third offset to reduce the first included angle and the first distance;

Comparing the first included angle and the preset angle, and the first distance and the preset distance;

When the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, the current optical path adjustment is ended.

Preferably, after the step of comparing the first included angle and the preset angle, and the first distance and the preset distance, the optical path adjustment method further includes the following steps:

When the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, the process of obtaining the first included angle between the first imaging beam and the second imaging beam is returned to step; or,

When the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, determine the comparison between the first included angle and the preset angle, the first distance and the first cumulative execution times of the steps of the preset distance;

Comparing the first cumulative execution times and the first preset times;

When the first cumulative number of executions is less than the first preset number of times, returning to the step of acquiring the first included angle between the first imaging beam and the second imaging beam;

When the first accumulated execution times is greater than or equal to the first preset times, the current optical path adjustment is terminated, and a prompt signal is generated.

Preferably, according to the first included angle, the step of determining the first offset of the second lens on a plane perpendicular to the optical axis includes:

determining the second cumulative execution times i of the step of acquiring the first angle between the first imaging beam and the second imaging beam, and denoting the first angle acquired for the i-th time as α _i ;

Comparing the first included angle α _i with the preset angle α ₀ ;

When the first included angle α _i is greater than the preset angle _{α 0} , and the second cumulative execution times _i is greater than _{1 ,} calculate the second the first adjustment coefficient k1 _{i of the second lens when the cumulative execution times is i} ;

Calculate the first offset D1 _i of the second lens when the second cumulative execution times is i according to D1 _i =α _i /k1 _i ;

When the first included angle α _i is greater than the preset angle α ₀ , and the second accumulated execution times i is equal to 1, the second accumulated execution times i calculated according to D1 ₁ =α ₁ /k1 ₁ is 1. the first offset D1 ₁ of the second lens;

Wherein, k1 ₁ is the first adjustment coefficient of the second lens when the second accumulation number is 1.

Preferably, according to the first distance, the step of determining the second offset of the second lens on a plane perpendicular to the optical axis includes:

Determine the third cumulative execution times j of the step of obtaining the first distance between the position of the first light spot and the position of the second light spot on the imaging plane, and denote the first distance obtained for the jth time as β _j ;

comparing the first distance β _j with the preset distance β ₀ ;

When the first distance _{β j} is greater than the preset distance β ₀ and the third cumulative execution times _j is greater than ₁ , calculate the _first The second adjustment coefficient k2 _{j of the second lens when the cumulative execution times are j} ;

Calculate the second offset D2 _j of the second lens when the third cumulative execution times is j according to D2 _j =β _j /k2 _j ;

When the first distance β _j is greater than the preset distance β ₀ and the third cumulative execution times j is equal to 1, the third cumulative execution times calculated according to D2 ₁ =β ₁ /k2 ₁ is 1. the second offset D2 ₁ of the second lens;

Wherein, k2 ₁ is the second adjustment coefficient of the second lens when the third cumulative execution times is 1.

Preferably, according to the first offset and the second offset, the step of determining the third offset includes:

obtaining a first position adjustment range of the second lens on a plane perpendicular to the optical axis according to the first offset;

obtaining a second position adjustment range of the second lens on a plane perpendicular to the optical axis according to the second offset;

The center of the overlapping area of the first adjustment range and the second adjustment range is determined, and the offset corresponding to the center of the overlapping area is used as the third offset.

Preferably, the optical device further includes a variable reflector, the variable reflector is located on the outgoing light path of the first lens, and the variable reflector is located on the exit light path of the second lens;

Before performing the step of acquiring the first angle between the first imaging beam and the second imaging beam for the first time, the optical path adjustment method further includes the following steps:

Adjusting the positions of the first lens and the second lens on a plane perpendicular to the optical axis, so that the third spot formed by the first imaging beam on the variable mirror is located on the variable reflection Within the first preset range of the mirror, the fourth spot formed by the second imaging beam on the variable reflector is located within the second preset range of the variable reflector;

The positions of the first lens and the second lens in the optical axis direction are adjusted so that the first imaging beam is focused on the imaging plane, and the second imaging beam is focused on the imaging plane.

Preferably, the position of the first lens on a plane perpendicular to the optical axis is adjusted, so that the third spot formed by the first imaging light beam on the variable mirror is located on the third spot of the variable mirror. A predetermined range of steps include:

The first lens is placed outside the optical path of the optical device, the first light source is controlled to illuminate the variable mirror, and a first image formed by the variable mirror on the imaging plane is acquired ;

obtaining, according to the first image, a first target range corresponding to the first preset range on the imaging plane;

Putting the first lens into the optical path of the optical device to obtain the position of the first light spot;

determining a fourth offset of the first lens according to the first target range and the position of the first light spot;

The position of the first lens on a plane perpendicular to the optical axis is adjusted according to the fourth offset, so that the first light spot is located within the first target range.

Preferably, the step of adjusting the position of the first lens in the direction of the optical axis so that the first imaging beam is focused on the imaging plane includes:

Obtain the relationship between the spot size of the lens and the imaging distance;

determining the first axial position of the first lens in the optical axis direction according to the relationship between the spot size and the imaging distance, and adjusting the first lens to the first axial position;

acquiring the first size of the first light spot when the first lens is located at the first axial position;

determining a second axial position and a third axial position of the first lens in the optical axis direction according to the first size and the relationship between the spot size and the imaging distance;

adjusting the first lens to the second axial position, and acquiring the second size of the first light spot when the first lens is at the second axial position;

adjusting the first lens to the third axial position, and acquiring the third size of the first light spot when the first lens is at the third axial position;

Determine the first minimum spot size among the first size, the second size and the third size, and the first lens is on the optical axis when the spot size of the first light spot is the first minimum spot size the position in the direction as the updated first axial position, and adjust the first lens to the first axial position;

Return to the step of acquiring the first size of the first spot when the first lens is located at the first axial position, until the minimum spot size obtained at the current time is greater than or equal to the minimum spot size obtained at the previous time, or the second distance between the first axial position and the second axial position is less than the minimum adjustable distance, or the third distance between the first axial position and the third axial position is less than the minimum adjustable distance, or the fourth cumulative execution times of the step of acquiring the first size of the first light spot when the first lens is located at the first axial position is greater than or equal to the second preset number of times .

Preferably, after the step of adjusting the first lens to the first axial position is performed for the last time, it further includes the following steps:

determining the fourth axial position of the first lens in the optical axis direction according to the preset step size and the preset direction, and adjusting the first lens to the fourth axial position;

acquiring the fourth size of the first light spot when the first lens is located at the fourth axial position;

Before and after adjusting the first lens to the fourth axial position, the spot size of the first light spot changes from large to small. The moving direction of the first lens in the direction of the optical axis is used as the updated preset direction ;

Returning to the step of determining the fourth axial position of the first lens in the optical axis direction according to the preset step size and the preset direction, and adjusting the first lens to the fourth axial position, Until the cumulatively acquired number of the fourth size is greater than or equal to a preset number;

According to each fourth axial position of the first lens and the corresponding fourth size, determine the relationship between the updated spot size of the lens and the imaging distance;

According to the updated relationship between the spot size of the lens and the imaging distance, the fifth axial position of the first lens in the optical axis direction is determined, and the first lens is adjusted to the fifth axial position;

acquiring the fifth size of the first light spot when the first lens is located at the fifth axial position;

Determine the second minimum spot size among the first size, the second size, the third size, the fourth size, and the fifth size, and set the spot size of the first spot as the second minimum spot size The position of the first lens in the direction of the optical axis when the spot size is the smallest is used as the focus position of the first lens, and the first lens is adjusted to the focus position.

Preferably, when adjusting the positions of the first lens and the second lens in the direction of the optical axis, the first imaging beam is focused on the imaging plane, and the second imaging beam is focused on the After the step of the imaging plane, the optical path adjustment method further includes the following steps:

Adjusting the positions of the first lens and the second lens on a plane perpendicular to the optical axis, so that the third spot formed by the first imaging beam on the variable mirror is located on the variable reflection Within the third preset range of the mirror, the fourth spot formed by the second imaging beam on the variable reflector is located within the fourth preset range of the variable reflector;

Wherein, the third preset range is less than or equal to the first preset range, and the fourth preset range is less than or equal to the second preset range.

Preferably, when the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, the step of ending the current optical path adjustment includes:

When the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, acquire a sixth size of the first light spot and a sixth size of the second light spot seven sizes;

comparing the sixth size with the first preset size, and the seventh size with the second preset size;

When the sixth size is less than or equal to the first preset size, and the seventh size is less than or equal to the second preset size, end the current optical path adjustment;

When the sixth size is larger than the first preset size, or the seventh size is larger than the second preset size, adjusting the first lens and the second lens in the optical axis direction so that the first imaging beam is focused on the imaging plane, and the second imaging beam is focused on the imaging plane.

The present invention also provides an optical path adjustment device for adjusting an optical path in an optical device, the optical device includes a first light source, a second light source, a first lens and a second lens, the first lens is located in the first lens On the outgoing light path of the light source, the second lens is located on the outgoing light path of the second light source;

The optical path adjustment device includes a first imaging component, a driving component, a memory, a processor, and an optical path adjustment program stored on the memory and executable on the processor, wherein: the first imaging component is located in the the outgoing light path of the first lens, and the first imaging component is located on the outgoing light path of the second lens, the first imaging component is used for receiving the first light spot and the second light spot; the driving The component is connected with the first lens and the second lens, and the driving component is used to adjust the position of the first lens and the position of the second lens; when the light path adjustment program is executed by the processor The step of implementing the optical path adjustment method, the optical path adjustment method includes the following steps: acquiring a first included angle between a first imaging beam and a second imaging beam, wherein the first imaging beam originates from the first imaging beam a light source, the second imaging light beam is derived from the second light source; according to the first included angle, determine the first offset of the second lens on the plane perpendicular to the optical axis; obtain the first offset on the imaging plane A first distance between a position of a light spot and a position of a second light spot, wherein the first light spot is formed on the imaging plane by the first imaging beam, and the second light spot is formed by the second imaging A light beam is formed on the imaging plane; according to the first distance, a second offset of the second lens on a plane perpendicular to the optical axis is determined; according to the first offset and the second offset Offset, determine a third offset; adjust the position of the second lens on a plane perpendicular to the optical axis according to the third offset, so as to reduce the first included angle and the first distance; compare the first angle and the preset angle, and the first distance and the preset distance; when the first angle is less than or equal to the preset angle, and the first distance is less than or When it is equal to the preset distance, the current optical path adjustment is ended.

Preferably, the optical device further includes a variable reflector, the variable reflector is located on the outgoing light path of the first lens, and the variable reflector is located on the exit light path of the second lens;

The optical path adjustment device further includes a beam splitter and a second imaging component, the beam splitter is located on the outgoing light path of the variable reflection mirror, and the first imaging component is located in the first outgoing light of the beam splitter on the way; a second imaging component, the second imaging component is located on the second outgoing light path of the beam splitter, and the second imaging component is used for receiving the first light spot and the second light spot.

Preferably, the first imaging component includes a holographic diffusion screen and a focus calibration camera; the second imaging component includes a conjugate lens and a position calibration camera.

In the technical solution of the present invention, the optical path adjustment method includes the following steps: obtaining a first angle between a first imaging beam and a second imaging beam, wherein the first imaging beam originates from the first light source, and the second imaging beam originates from the first imaging beam. Two light sources; determine the first offset of the second lens on a plane perpendicular to the optical axis according to the first included angle; obtain the first distance between the position of the first spot on the imaging plane and the position of the second spot, Wherein, the first light spot is formed by the first imaging light beam on the imaging plane, and the second light spot is formed by the second imaging light beam on the imaging plane; according to the first distance, the second lens of the second lens on the plane perpendicular to the optical axis is determined. Offset; determine the third offset according to the first offset and the second offset; adjust the position of the second lens on the plane perpendicular to the optical axis according to the third offset to reduce the first The included angle and the first distance; compare the first included angle and the preset angle, and the first distance and the preset distance; when the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance to end the current optical path adjustment. When adjusting the optical device, take one of the optical paths as the reference optical path (the optical path where the first imaging beam is located), and according to the clip between the imaging beam of the modulated optical path (the optical path where the second imaging beam is located) and the imaging beam of the reference optical path angle, and the distance between the light spot in the modulated light path and the position of the light spot in the reference light path on the imaging plane, respectively determine the first offset and the second offset of the second lens in the modulated light path, and according to The first offset and the second offset are obtained to obtain a third offset that controls the movement of the second lens, and the position of the second lens is adjusted according to the third offset until the first included angle is less than or equal to the preset angle , the first distance is less than or equal to the preset distance, so that the imaging beam of the modulated optical path can be normally combined with the imaging beam of the reference optical path. The optical path adjustment method proposed by the present invention makes the adjustment of the optical path in the optical device more systematic. This systematicity makes the automatic adjustment of the optical path possible, and it is convenient to use a driving component or the like to drive the second lens to automatically change its position according to the third offset. At the same time, This optical path adjustment method also improves the accuracy and stability of the multi-channel imaging beam synthesis, and improves the assembly yield and assembly efficiency of the optical device.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained according to the structures shown in these drawings without creative efforts.

1 is a schematic structural diagram of an optical device and an optical path adjustment device according to an embodiment of the optical path adjustment device of the present invention;

FIG. 2 is a schematic flowchart of the first embodiment of the optical path adjustment method of the present invention;

Fig. 3 is the calculation schematic diagram of the first included angle in the optical path adjustment method of Fig. 2;

4 is a schematic flowchart of a seventh embodiment of the optical path adjustment method of the present invention;

FIG. 5 is a schematic diagram of the relationship between the spot size of the lens and the imaging distance according to the ninth embodiment of the optical path adjustment method of the present invention.

The realization, functional characteristics and advantages of the present invention will be further described with reference to the accompanying drawings in conjunction with the embodiments.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that if there are directional indications (such as up, down, left, right, front, back, etc.) involved in the embodiments of the present invention, the directional indications are only used to explain a certain posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for the purpose of description, and should not be construed as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on the realization by those of ordinary skill in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of such technical solutions does not exist. , is not within the scope of protection required by the present invention.

The present invention provides an optical path adjustment method.

In the first embodiment of the present invention, as shown in FIG. 1 , the optical device 100 includes a first light source 111 , a second light source 112 , a first lens 121 and a second lens 122 , and the first lens 121 is located at the position of the first light source 111 . On the outgoing light path, the second lens 122 is located on the outgoing light path of the second light source 112 .

Specifically, the optical device 100 in this embodiment may be a micro projector. In order to realize color projection, the micro projector is usually provided with a first light source 111, a second light source 112 and The third light source 113 has a first light path, a second light path and a third light path corresponding to each light source, and the structures of the light paths are basically similar. In order to reduce the space occupied by optical devices such as micro-projectors, the first reflecting mirror 141, the second reflecting mirror 142 and the third reflecting mirror 143, etc. may be arranged in the first optical path, the second optical path and the third optical path, respectively, so as to Change the direction of light propagation and improve space utilization in optical equipment. When adjusting the micro-projector, the green, red, The blue trichromatic light can synthesize color projection images on the imaging plane. It should be noted that the lens here can be a single lens or a lens group that can meet certain imaging requirements. When adjusting the optical path, the adjustment method of the lens group can refer to the adjustment method of a single lens to achieve different optical paths. Composition of imaging beams. In the following, we will take the first optical path as the reference optical path to adjust the second optical path (the modulated optical path) to realize the synthesis of the imaging beam in the first optical path and the imaging beam in the second optical path as an example. The technical solution of the invention is described in detail. It should be noted that in other optical devices, there may also be multiple optical paths set in other ways. Those skilled in the art can adjust various forms of optical paths according to the method of adjusting the second optical path in this embodiment, that is, Adjust the modulated light paths according to the reference light paths respectively, until all the light paths are adjusted. Since green light is basically in the central band of visible light, in micro projectors, the light path corresponding to green light is usually used as the reference light path, and the light paths of red light and blue light are adjusted respectively. Of course, other light paths can also be arbitrarily selected as the reference light path for adjustment. . In this embodiment, mainly by adjusting the position of the second lens 122, the first imaging light beam from the first light source 111 and the second imaging light beam from the second light source 112 can be synthesized normally.

As shown in Figure 2, the optical path adjustment method includes the following steps:

Step S100, acquiring a first angle between the first imaging beam and the second imaging beam;

The first imaging light beam originates from the first light source 111 , and the second imaging light beam originates from the second light source 112 . Considering that the light beam emitted by the light source may be deflected in the light path under the action of a mirror, etc., when calculating the first included angle, after calculating the first lens 121 and the second lens 122, and between the corresponding optical elements The included angle between the first imaging beam and the second imaging beam is taken as the first included angle. In the following description, for simplicity, the calculation is performed based on the first imaging beam and the second imaging beam closest to the imaging plane. Generally, the first included angle between the first imaging beam and the second imaging beam is a relatively small acute angle. As shown in FIG. 3 , in a specific example, the plane where the first imaging beam and the second imaging beam are co-located is the YZ plane, and the calculation of the first included angle α can be based on α=arctan(m ₂ /n)-arctan (m ₁ /n), where m ₁ is the distance between the first light spot formed by the first imaging beam on the imaging plane and the center of the imaging plane (assuming that the first light spot is located above the center of the imaging plane, m ₁ is positive ; when the first light spot is located below the center of the imaging plane, m ₁ is negative), m ₂ is the distance between the second light spot formed by the second imaging beam on the imaging plane and the center of the imaging plane (assuming that the second light spot is located at the center of the imaging plane) When it is above, _m2 is positive; when the second spot is located below the center of the imaging plane, _m2 is negative), the center of the imaging plane is the intersection between the imaging plane and the optical axis; n is the imaging distance, and the imaging distance is the closest to the imaging plane. The distance between the intersection of the straight line where the first imaging light beam is located and the straight line where the second imaging light beam closest to the imaging plane is located and the center of the imaging plane.

Step S200, determining a first offset of the second lens 122 on a plane perpendicular to the optical axis according to the first included angle;

When the first included angle is too large, it will be difficult to combine the first imaging beam and the second imaging beam, and it is necessary to adjust the position of the second lens 122 on the plane perpendicular to the optical axis to reduce the first imaging beam and the second imaging beam The first angle between the beams. The first offset of the second lens 122 is determined according to the first included angle, and the larger the first included angle is, the larger the corresponding first offset is, so as to correct the position of the second lens. When determining the first offset, the first offset may also be calculated according to the known correspondence between the direction of the imaging beam and the position of the second lens, which will be described in detail later.

Step S300, obtaining the first distance between the position of the first light spot and the position of the second light spot on the imaging plane;

Wherein, the first light spot is formed by the first imaging light beam on the imaging plane, and the second light spot is formed by the second imaging light beam on the imaging plane. As shown in Fig. 3, when calculating the first distance, when the plane where the first imaging beam and the second imaging beam are located is taken as the YZ plane, the distance between the first light spot and the second light spot can be determined according to the The positions of the first spot and the second spot are obtained. It should be noted that if the first imaging beam and the second imaging beam are not both on the YZ plane, it is necessary to comprehensively consider the distance between the first light spot and the second light spot in each direction, and then obtain according to the orthogonal relationship of the coordinates. The distance between the first spot and the second spot.

Step S400, determining a second offset of the second lens on a plane perpendicular to the optical axis according to the first distance;

When the first distance is too large, it is difficult to combine the first imaging beam and the second imaging beam. It is necessary to adjust the position of the second lens 122 on the plane perpendicular to the optical axis to reduce the position of the first spot and the second spot. the first distance between the positions. The second offset of the second lens 122 is determined according to the first distance, and the larger the first distance, the greater the corresponding second offset, so as to correct the position of the second lens. When the second offset of the second lens 122 is determined, it can also be decomposed according to the orthogonal coordinate system shown in FIG. 3 accordingly, and the component of the second offset in the X direction and the component of the second offset in the Y direction can be obtained respectively. Since the X direction and the Y direction are perpendicular to each other, there is basically no interference between the X direction and the Y direction when adjusting the second lens, which is beneficial to simplify the adjustment process. When determining the second offset, the second offset may also be calculated according to the known correspondence between the position of the light spot on the imaging plane and the position of the second lens, which will be described in detail later.

Step S500, determining a third offset according to the first offset and the second offset;

In order to avoid that the first distance is too large when the first angle is adjusted, or the first angle is too large when the first distance is adjusted, it is necessary to determine the first offset and the second offset according to the first offset and the second offset. The third offset is determined, and the adjustment range of the second lens 122 is limited, so as to reduce the adjustment mutual interference between the first included angle and the first distance. Generally, the third offset is determined according to the overlapping area of the first position adjustment range determined by the first offset and the second position adjustment range determined by the second offset. When limiting the second lens 122 in the overlapping area When the position is changed in the middle, the optimization of the first angle and the first distance can be realized at the same time, which will be described in detail later.

Step S600, adjusting the position of the second lens 122 on a plane perpendicular to the optical axis according to the third offset to reduce the first included angle and the first distance;

After the third offset is determined, the position of the second lens 122 on a plane perpendicular to the optical axis is actually adjusted according to the third offset, so as to reduce the first included angle and the first distance. In order to simplify the adjustment and avoid mutual interference between the adjustment in the X direction and the Y direction, the component of the third offset in the X direction and the component in the Y direction can be determined respectively, and the position of the second lens can be adjusted. The adjustment of the position of the second lens 122 can also be completed automatically by the driving assembly, so as to improve the accuracy and stability of the position adjustment.

Step S710, compare the first angle with the preset angle, and the first distance and the preset distance;

By comparing the first angle with the preset angle, the first distance and the preset distance, it is determined whether the first imaging beam and the second imaging beam can be combined normally, so as to further determine whether the position of the second lens 122 needs to be further adjusted.

Step S721 , when the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, end the current optical path adjustment.

When the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, it indicates that the deviation between the first imaging beam and the second imaging beam is very small and can be synthesized normally, and the current time ends Optical path adjustment.

In this embodiment, the optical path adjustment method includes the following steps: acquiring a first angle between a first imaging beam and a second imaging beam, wherein the first imaging beam originates from the first light source 111 and the second imaging beam originates from the second light source 112; according to the first included angle, determine the first offset of the second lens 122 on the plane perpendicular to the optical axis; a distance, wherein the first light spot is formed by the first imaging light beam on the imaging plane, and the second light spot is formed by the second imaging light beam on the imaging plane; according to the first distance, it is determined that the second lens 122 is on a plane perpendicular to the optical axis According to the first offset and the second offset, determine the third offset; adjust the position of the second lens 122 on the plane perpendicular to the optical axis according to the third offset, To reduce the first angle and the first distance; compare the first angle and the preset angle, and the first distance and the preset distance; when the first angle is less than or equal to the preset angle, and the first distance is less than or When it is equal to the preset distance, the current optical path adjustment is ended. When adjusting the optical device, take one of the optical paths as the reference optical path (the optical path where the first imaging beam is located), and according to the clip between the imaging beam of the modulated optical path (the optical path where the second imaging beam is located) and the imaging beam of the reference optical path angle, and the distance between the light spot in the modulated light path and the position of the light spot in the reference light path on the imaging plane, respectively determine the first offset and the second offset of the second lens 122 in the modulated light path, and According to the first offset and the second offset, a third offset for controlling the movement of the second lens 122 is obtained, and the position of the second lens 122 is adjusted according to the third offset until the first included angle is less than or equal to For the preset angle, the first distance is less than or equal to the preset distance, so that the imaging beam of the modulated optical path can be normally combined with the imaging beam of the reference optical path. The optical path adjustment method proposed by the present invention makes the adjustment of the optical path in the optical device more systematic. This systematicity makes the automatic adjustment of the optical path possible, and it is convenient to use a driving component or the like to drive the second lens 122 to automatically change the position according to the third offset, and at the same time , This optical path adjustment method also improves the accuracy and stability of the multi-channel imaging beam synthesis, and improves the assembly yield and assembly efficiency of the optical device.

Based on the above-mentioned first embodiment, in the second embodiment of the present invention, after step S710, the optical path adjustment method further includes the following steps:

Step S722, when the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, return to step S100.

In this embodiment, after changing the position of the second lens 122 each time, if the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, it indicates that the first imaging beam and the second imaging beam are at this time. The deviation between them is still large, which will affect the combination of the first imaging beam and the second imaging beam. Therefore, by returning to step S100, the position of the second lens 122 is continuously adjusted until the first included angle is less than or equal to the predetermined angle. When the angle is set, and the first distance is less than or equal to the preset distance, the adjustment is ended.

Based on the above-mentioned first embodiment, in the third embodiment of the present invention, after step S710, the optical path adjustment method further includes the following steps:

Step S723, when the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, determine the first cumulative execution times of step S710;

Step S724, comparing the first cumulative execution times and the first preset times;

Step S725, when the first accumulated execution times is less than the first preset times, return to step S100;

Step S726, when the first accumulated execution times is greater than or equal to the first preset times, suspend the current optical path adjustment, and generate a prompt signal.

In this embodiment, considering that there may be problems with the optical device itself, it is impossible to adjust to the state where the first imaging beam and the second imaging beam are combined normally. The execution times of S710 are accumulated. That is to say, when the first cumulative execution times of step S710 is greater than or equal to the first preset times, it indicates that the position of the second lens 122 has been changed many times, and the adjustment requirements of the optical path in the optical device are still not met, and the present operation is terminated. The secondary optical path is adjusted and a prompt signal is generated to prompt the relevant personnel to check the optical equipment to improve the adjustment efficiency; when the first cumulative execution times are less than the first preset times, it indicates that the adjustment times of the position of the second lens 122 has not reached the upper limit. times, return to step S100 to continue to adjust the optical path of the optical device.

Based on the above embodiments, in the fourth embodiment of the present invention, step S200 includes:

Step S210, determine the second cumulative execution times i of step S100, and denote the first angle obtained for the i-th time as α _i ;

Step S220, comparing the first included angle α _i with the preset angle α ₀ ;

Step S231, when the first included angle α _i is greater than the preset angle α ₀ and the second accumulated execution times i is greater than 1, calculate the second accumulated execution times according to k1 _i =α _i /D1 _i-1 -k1 _i-1 When i is the first adjustment coefficient k1 _i of the second lens;

Step S232, calculating the first offset D1 _i of the second lens when the second cumulative execution times is i according to D1 _i =α _i /k1 _i ;

Step S240: When the first included angle α _i is greater than the preset angle α ₀ , and the second cumulative execution times i is equal to 1, calculate the second cumulative number of times 1 according to D1 ₁ =α ₁ /k1 ₁ when the second cumulative number of times is 1. an offset D1 ₁ ;

Wherein, k1 ₁ is the first adjustment coefficient of the second lens when the second accumulation number is 1. In this embodiment, a step-by-step determination method is adopted to obtain the first offset, and the first adjustment coefficient represents the relationship between the offset of the second lens 122 and the change of the first angle. In each process of determining the first offset, the first adjustment coefficient of this time is updated according to the first offset obtained last time and the first adjustment coefficient adopted last time to avoid excessive adjustment. Improve regulation efficiency. Specifically, when the first offset D1 ₁ is determined for the _first time, the first offset D1 _{1 =} α ₁ /k1 ₁ . After continuing to perform steps S300 to S600, that is, after actually changing the position of the second lens 122 according to the third offset amount obtained for the first time, if the first angle α ₂ is still greater than the preset angle α ₀ at this time , a second adjustment is required. When the first offset D1 ₂ is determined for the second time, the second adjustment coefficient k1 ₂ is obtained according to k1 ₂ =α ₂ /D1 ₁ -k1 ₁ , and then the second offset is determined according to D1 ₂ =α ₂ /k1 ₂ D1 ₂ , continue to perform steps S300 to S600, change the position of the second lens 122 according to the third offset obtained for the second time, and so on to adjust until the first angle is less than or equal to the preset angle, And the first distance is less than or equal to the preset distance. When determining the first offset, the space can be decomposed according to the orthogonal coordinate system to obtain the first offset in each direction, so as to simplify the adjustment of the second lens 122 .

Based on the above embodiments, in the fifth embodiment of the present invention, step S400 includes:

Step S410, determine the third cumulative execution times j of step S300, and denote the first distance obtained for the jth time as β _j ;

Step S420, comparing the first distance β _j with the preset distance β ₀ ;

Step S431, when the first distance β _j is greater than the preset distance β ₀ and the third cumulative execution times j is greater than 1, calculate the third cumulative execution according to k2 _j =(β _j -β _j-1 )/D2 _j-1 The second adjustment coefficient k2 _{j of the second lens when the number of times is j} ;

Step S432, calculating the second offset D2 _j of the second lens when the third cumulative execution times is j according to D2 _j =β _j /k2 _j ;

Step S440: When the first distance β _j is greater than the preset distance β ₀ and the third cumulative execution times j is equal to 1, calculate the third cumulative execution times of the second lens according to D2 ₁ =β ₁ /k2 ₁ when the third cumulative execution times is 1. two offsets D2 ₁ ;

Wherein, k2 ₁ is the second adjustment coefficient of the second lens when the third cumulative execution times is 1. In this embodiment, a step-by-step determination method is used to obtain the second offset, and the second adjustment coefficient represents the relationship between the offset of the second lens 122 and the position change of the light spot on the imaging plane. In each process of determining the second offset, the current second adjustment coefficient is updated according to the second offset obtained last time and the second adjustment coefficient used last time to avoid excessive adjustment. Improve regulation efficiency. Specifically, when the second offset D2 ₁ is determined for the first time, the second offset D2 ₁ =β is obtained according to the preset second adjustment coefficient k2 ₁ and the first distance β ₁ obtained for the first time ₁ /k2 ₁ . After continuing to perform steps S500 to S600, that is, after actually changing the position of the second lens 122 according to the third offset obtained for the first time, if the first distance β ₂ is still greater than the preset distance β ₀ at this time, A second adjustment is required. When the second offset D2 ₂ is determined for the second time, the second adjustment coefficient k2 2 is obtained according to k2 ₂ =(β ₂ -β ₁ )/D2 ₂ , and then the second adjustment coefficient k2 ₂ is determined according to D2 ₂ =β ₂ /k2 ₂ Offset D2 ₂ , continue to perform steps S500 to S600 , change the position of the second lens 122 according to the third offset obtained for the second time, and so on to adjust until the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance. When determining the second offset, the space can be decomposed according to the orthogonal coordinate system to obtain the second offset in each direction, so as to simplify the adjustment of the second lens 122 .

Based on the above embodiments, in the sixth embodiment of the present invention, step S500 includes:

Step S510, obtaining a first position adjustment range of the second lens on a plane perpendicular to the optical axis according to the first offset;

Step S520, obtaining a second position adjustment range of the second lens on a plane perpendicular to the optical axis according to the second offset;

Step S530: Determine the center of the overlapping area of the first adjustment range and the second adjustment range, and use the offset corresponding to the center of the overlapping area as the third offset.

In order to avoid interference between the adjustment of the first included angle and the first distance, the first included angle becomes smaller and the first distance increases, or when the first included angle decreases, the first included angle increases. In an example, the first offset amount and the second offset amount are comprehensively considered to determine the actual change amount of the position of the second lens 122 , that is, the third offset amount. Specifically, the first position adjustment range of the second lens 122 on a plane perpendicular to the optical axis is obtained, the first offset is the maximum adjustment amount of the second lens obtained according to the first included angle, and the first position adjustment range is in Within the maximum adjustment amount corresponding to the first offset. Similarly, the second position adjustment range of the second lens 122 on the plane perpendicular to the optical axis is obtained according to the second offset, and the second offset is the maximum adjustment amount of the second lens obtained according to the first distance, The second position adjustment range is within the maximum adjustment amount corresponding to the second offset amount. Then, according to the overlapping area of the first position adjustment range and the second position adjustment range, an adjustment range of the second lens 122 that can reduce both the first angle and the first distance can be obtained. Further, in order to improve the adjustment efficiency, the center of the overlapping area is taken as the third offset, so as to achieve rapid adjustment on the basis of ensuring that both the first angle and the first distance can be reduced.

Based on the above embodiments, in the seventh embodiment of the present invention, as shown in FIG. 1 , the optical device further includes a variable reflector 130 . The variable reflector 130 is located on the outgoing light path of the first lens 121 and is variable The reflector is located on the outgoing light path of the second lens 122;

As shown in FIG. 4 , before step S100 is performed for the first time, the optical path adjustment method further includes the following steps:

Step S810, adjusting the positions of the first lens and the second lens on a plane perpendicular to the optical axis, so that the third spot formed by the first imaging beam on the variable mirror is located in the first preset range of the variable mirror inside, the fourth spot formed by the second imaging light beam on the variable mirror is located within the second preset range of the variable mirror;

Step S820: Adjust the positions of the first lens and the second lens in the direction of the optical axis, so that the first imaging beam is focused on the imaging plane, and the second imaging beam is focused on the imaging plane.

Since the position of the optical element may move slightly after long-term use, when adjusting the optical path, the imaging beam should be irradiated at the center of the optical element as much as possible, so that even if the position of the optical element is shifted, the impact on the final image will not be affected. smaller. Therefore, before adjusting the combination of imaging beams in different optical paths, each optical path needs to be adjusted separately, so that the imaging beams in each optical path basically illuminate the center of the optical element and focus normally to obtain better imaging effects. Specifically, by adjusting the positions of the first lens 121 and the second lens 122 on the plane perpendicular to the optical axis, the third spot formed by the first imaging beam on the variable mirror 130 is located at the first spot of the variable mirror 130 Within the preset range, the first preset range is usually the range near the center of the variable mirror 130 , and the fourth spot formed by the second imaging beam on the variable mirror 130 is located at the second spot of the variable mirror 130 . Within the preset range, the second preset range is usually also a range near the center of the variable mirror 130, and may also be consistent with the first preset range. By adjusting the positions of the first lens 121 and the second lens 122 in the direction of the optical axis, the first imaging beam and the second imaging beam can be focused on the imaging plane to achieve a clear display effect.

In the following, the adjustment of the first optical path where the first light source 111 is located will be taken as an example to describe the position adjustment and focus adjustment of the imaging beam in the optical path. Those skilled in the art will know that the adjustment of other optical paths can refer to the first The adjustment of the optical path is carried out. Based on the seventh embodiment of the present invention, in the eighth embodiment of the present invention, step S810 includes:

Step S811, placing the first lens 121 outside the optical path of the optical device, controlling the first light source 111 to illuminate the variable mirror 130, and acquiring the first image formed by the variable mirror 130 on the imaging plane;

Step S812, obtaining a first target range corresponding to the first preset range on the imaging plane according to the first image;

Step S813, placing the first lens 121 in the optical path of the optical device to obtain the position of the first light spot;

Step S814, determining the fourth offset of the first lens according to the first target range and the position of the first light spot;

Step S815: Adjust the position of the first lens on a plane perpendicular to the optical axis according to the fourth offset, so that the first light spot is located within the first target range.

In this embodiment, when the first lens 121 is out of the optical path, the variable mirror 130 is illuminated by the first light source 111 to obtain a first image, and the first image corresponds to the image of the variable mirror 130. An image, the corresponding first target range on the imaging plane of the first preset range on the variable mirror 130 can be determined. After the first lens 121 is placed in the optical path, the imaging light beam is concentrated to form a first light spot. When the first light spot is in the first target range, it can be determined that the light beam generated by the first light source 111 is basically irradiated on the variable If the reflector 130 is within the first preset range, the adjustment requirements are met.

Based on the above seventh and eighth embodiments, in the ninth embodiment of the present invention, step S820 includes:

Step S821, obtaining the relationship between the spot size of the lens and the imaging distance;

Step S822, determining the first axial position of the first lens 121 in the optical axis direction according to the relationship between the spot size and the imaging distance, and adjusting the first lens 121 to the first axial position;

Step S823a, acquiring the first size of the first light spot when the first lens 121 is located at the first axial position;

Step S823b, determining the second axial position and the third axial position of the first lens 121 in the optical axis direction according to the relationship between the first size and the spot size and the imaging distance;

Step S823c, adjusting the first lens 121 to the second axial position, and acquiring the second size of the first light spot when the first lens 121 is at the second axial position;

Step S823d, adjusting the first lens 121 to the third axial position, and acquiring the third size of the first light spot when the first lens is at the third axial position;

Step S823e: Determine the first minimum spot size among the first size, the second size and the third size, and take the position of the first lens 121 in the optical axis direction when the spot size of the first spot is the first minimum spot size, as the updated first axial position, and adjust the first lens to the first axial position;

Step S823f, return to step S823a, until the minimum spot size obtained at the current time is greater than or equal to the minimum spot size obtained at the previous time, or the second distance between the first axial position and the second axial position is less than the minimum adjustable distance, Or the third distance between the first axial position and the third axial position is smaller than the minimum adjustable distance, or the fourth cumulative execution count of step S823a is greater than or equal to the second preset count.

In this embodiment, the focus position of the first lens is determined according to the relationship between the spot size of the lens and the imaging distance. Specifically, the relationship between the spot size of the lens and the imaging distance can be measured by measuring the relationship between the spot size and the imaging distance in a plurality of (usually 50 to 100) lenses of the same type as the first lens 121, and further Perform statistics, averaging, fitting, etc. to obtain. As shown in Figure 5, it is a schematic diagram of the relationship between the spot size of a lens and the imaging distance. The interval between the measurement points in the figure is 1 μm, and the measurement range is about 300 μm. The obtained spot size R and the imaging distance are fitted The relationship between Z is: in the case of underfocus, R=135538Z+514588, and in the case of overfocus, R=-83849Z-315434. It should be noted that the above fitting relationship may vary with the type of the selected first lens 121 . According to the relationship between the spot size and the imaging distance, roughly determine the focus position of the first lens, that is, the first axial position, that is, when the spot size is close to the minimum, the first axial position of the first lens 121 corresponding to the imaging distance , and adjust the first lens to the first axial position.

Since the imaging performance of different first lenses 121 may be different, the focus position thereof needs to be further optimized. By acquiring the first size of the first light spot when the first lens is located at the first axial position, and then determining the second size of the first lens 121 in the optical axis direction according to the relationship between the first size and the size of the light spot and the imaging distance Axial position and a third axial position. It can be seen from FIG. 5 that, when the first light spot does not reach the minimum size, corresponding to the same first size, the first lens may be located at the position corresponding to the underfocus, or may be located at the position corresponding to the overfocus. The axial position corresponds to underfocus or overfocus. By adjusting the first lens 121 to the second axial position and the third axial position respectively, and obtaining the second size and the third size of the first light spot, compare the first size , the second size and the third size, to obtain the smallest spot size, that is, the first minimum spot size, the position of the first lens 121 corresponding to the first minimum spot size is closer to the focus position, and this position is taken as the updated first an axial position, and adjust the first lens 121 to the updated first axial position. Continue to adjust the position of the first lens 121 in the direction of the optical axis by analogy, until the minimum spot size obtained at the current time is greater than or equal to the minimum spot size obtained at the previous time, that is, it is difficult to effectively optimize focusing by this method. Or, considering that the position adjustment of the first lens 121 is not absolutely continuous, when the second distance between the first axial position and the second axial position is smaller than the minimum adjustable distance, the precise adjustment can no longer actually be performed, At this point, stop continuing to adjust. Similarly, when the third distance between the first axial position and the third axial position is smaller than the minimum adjustable distance, the precise adjustment cannot actually be performed, and the continuous adjustment is stopped. Or, when the fourth cumulative execution times of step S823a is greater than or equal to the second preset times, that is, after the adjustment has been made for many times, the continuous adjustment is stopped to improve the adjustment efficiency and avoid multiple invalid repetitions.

Based on the above ninth embodiment, in the tenth embodiment of the present invention, after the step of adjusting the first lens to the first axial position is performed for the last time, the following steps are further included:

Step S824a, determining the fourth axial position of the first lens in the direction of the optical axis according to the preset step size and the preset direction, and adjusting the first lens to the fourth axial position;

Step S824b, acquiring the fourth size of the first light spot when the first lens is located at the fourth axial position;

Step S824c, before and after adjusting the first lens to the fourth axial position, the spot size of the first light spot changes from large to small, the moving direction of the first lens in the optical axis direction, as the updated preset direction;

Step S824d: Return to step S824a until the cumulatively acquired number of the fourth size is greater than or equal to the preset number;

Step S824e, according to each fourth axial position of the first lens and the corresponding fourth size, determine the relationship between the spot size of the updated lens and the imaging distance;

Step S824f, according to the updated relationship between the spot size of the lens and the imaging distance, determine the fifth axial position of the first lens in the direction of the optical axis, and adjust the first lens to the fifth axial position;

Step S825, acquiring the fifth size of the first light spot when the first lens is located at the fifth axial position;

Step S826: Determine the second minimum spot size among the first size, the second size, the third size, the fourth size and the fifth size, and set the spot size of the first spot to be the second minimum spot size when the first lens is in the light spot. The position in the axial direction is used as the focus position of the first lens, and the first lens is adjusted to the focus position.

In order to further optimize the focus position of the first lens 121, based on the specific optical path adjusted this time, the relationship between the spot size of the first lens 121 and the imaging distance is fitted, and the imaging distance is determined according to the fitting result, This in turn determines a more accurate focus position. During the fitting process, the measurement points are collected according to the preset step size and the preset direction, and the specific parameters sampled by each measurement point include the fourth axial position and the fourth size of the first light spot. It should be noted that the position of the measurement point is not collected according to a single preset direction, but the preset direction is determined according to the direction of the spot size in this sampling from large to small, so that the collected measurement points can include as much as possible. The range with the smallest spot size, until the number of collected measurement points reaches the preset number N. The preset step size δ can take the smaller value between 2*d ₀ /(N-1) and the minimum adjustable distance, where d ₀ is the total fitting range. In some cases, it may not be possible to determine the preset direction according to the above method. According to the relationship between the spot size of the existing lens and the imaging distance, a certain number of measurement points are taken on both sides of the measurement point with the smallest spot size. Fit the relationship between spot size and imaging distance. Fitting the preset number of fourth axial distances and the corresponding fourth dimensions to obtain the updated relationship between the spot size R of the lens and the imaging distance Z, where R=aZ ² +bZ can be used The parabolic relationship of +c is fitted. According to the updated relationship between the spot size of the lens and the imaging distance, the fifth axial position of the first lens in the optical axis direction is determined, and the first lens 121 is adjusted to the fifth axial position to obtain the Fifth size, ideally, the fifth axial position is the focus position, and the fifth size is the minimum size of the first light spot. However, considering factors such as disturbance during the adjustment process, in order to further verify the focus position of the first lens 121, determine the second of the first size, second size, third size, fourth size and fifth size obtained above. Minimum spot size, take the position of the first lens in the optical axis direction when the spot size of the first spot is the second minimum spot size, as the focus position of the first lens, and adjust the first lens to the focus position to complete this optical path focus adjustment.

Based on the above embodiments, in the eleventh embodiment of the present invention, after step S820, the optical path adjustment method further includes the following steps:

Step S830, adjusting the positions of the first lens and the second lens on a plane perpendicular to the optical axis, so that the third spot formed by the first imaging beam on the variable mirror is located in the third preset range of the variable mirror inside, the fourth spot formed by the second imaging light beam on the variable mirror is located within the fourth preset range of the variable mirror;

The third preset range is less than or equal to the first preset range, and the fourth preset range is less than or equal to the second preset range. In the process of adjusting each optical path, the position of the imaging beam and the focus of the imaging beam often need to be adjusted alternately to gradually approach the optimum state. That is to say, after focusing the optical path, the position of the light spot may change. It is necessary to fine-tune the position of the light spot so that the third light spot formed by the first imaging beam on the variable mirror is located in the third preset of the variable mirror. Within the range, the fourth light spot formed by the second imaging light beam on the variable reflector is located within a fourth preset range of the variable reflector, so as to complete the light path.

Based on the above embodiments, in the twelfth embodiment of the present invention, step S721 includes:

Step S721a, when the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, acquiring the sixth size of the first spot and the seventh size of the second spot;

Step S721b, comparing the sixth size with the first preset size, and the seventh size with the second preset size;

Step S721c, when the sixth size is less than or equal to the first preset size, and the seventh size is less than or equal to the second preset size, end the current optical path adjustment;

Step S721d, when the sixth size is larger than the first preset size, or the seventh size is larger than the second preset size, adjust the positions of the first lens and the second lens in the direction of the optical axis, so that the first imaging beam is focused on an imaging plane, and the second imaging beam is focused on the imaging plane.

When adjusting the adjustment of each imaging beam, the position of the imaging beam is actually fine-tuned, which may affect its focusing. Therefore, after the synthesis and adjustment of each imaging beam, it is necessary to continue to verify and adjust the focusing of the beams, so that the final imaging can meet the requirements.

The present invention also provides an optical path adjusting device for adjusting the optical path in an optical device. As shown in FIG. 1 , in an embodiment of the present invention, the optical device includes a first light source 111 , a second light source 112 , and a first lens 121 and the second lens 122 , the first lens 121 is located on the outgoing optical path of the first light source 111 , and the second lens 122 is located on the outgoing optical path of the second light source 112 .

Specifically, the optical device 100 in this embodiment may be a micro projector. In order to realize color projection, the micro projector is usually provided with a first light source 111, a second light source 112 and The third light source 113 has a first light path, a second light path and a third light path corresponding to each light source, and the structures of the light paths are basically similar. In order to reduce the space occupied by optical devices such as micro-projectors, the first reflecting mirror 141, the second reflecting mirror 142 and the third reflecting mirror 143, etc. may be arranged in the first optical path, the second optical path and the third optical path, respectively, so as to Change the direction of light propagation and improve space utilization in optical equipment. When adjusting the micro-projector, the green, red, The blue trichromatic light can synthesize color projection images on the imaging plane. It should be noted that the lens here can be a single lens or a lens group that can meet certain imaging requirements. When adjusting the optical path, the adjustment method of the lens group can refer to the adjustment method of a single lens to achieve different optical paths. Composition of imaging beams.

Further, the optical path adjustment device includes a first imaging component 222, a driving component, a memory, a processor, and an optical path adjustment program stored in the memory and running on the processor, wherein: the first imaging component 220 is located at the position of the first lens 121. On the outgoing light path, and the first imaging component 220 is located on the outgoing light path of the second lens 122, the first imaging component 220 is used to receive the first light spot and the second light spot; the driving component is connected to the first lens 121 and the second lens 122, The driving component is used to adjust the position of the first lens 121 and the position of the second lens 122 . The drive assembly may specifically include a stepper motor and a transmission system. The drive system connects the stepper motor and each lens. Through the drive assembly, the position of the lens can be automatically changed, thereby realizing the automatic adjustment of the optical path, thereby avoiding the low efficiency and accuracy of manual adjustment. rate differences, etc.

Further, as shown in FIG. 1 , the optical device further includes a variable reflector 130 , the variable reflector 130 is located on the outgoing light path of the first lens 121 , and the variable reflector 130 is located on the exit light path of the second lens 122 . In a micro-projector, the variable mirror 130 typically includes a micro-electro-mechanical system (MEMS) to realize the projection of various images.

The optical path adjustment device further includes a beam splitter 210 and a second imaging assembly 230, the beam splitter 210 is located on the outgoing optical path of the variable mirror 130, and the first imaging assembly 220 is located on the first outgoing optical path of the beam splitter 210; The imaging component 230 is located on the second outgoing light path of the beam splitter 210, and the second imaging component 230 is used for receiving the first light spot and the second light spot. Specifically, the beam splitter 210 divides each imaging beam into two beams to receive the imaging light spot, so as to adjust the position and focus of the imaging beam respectively. The first imaging component 220 includes a holographic diffusion screen 221 and a focus calibration camera 222 for receiving the imaging spot formed by the imaging beam, and adjusting the focus by changing the position of the lens in the direction of the optical axis; the second imaging component 230 includes a conjugate lens 231 and The position calibration camera 232 is used to receive the imaging light spot formed by the imaging light beam, and adjust the position of the imaging light beam by changing the position of the lens on the plane perpendicular to the optical axis direction, so as to improve the imaging effect.

The processor can call the optical path adjustment program stored in the memory and perform the following operations:

acquiring a first angle between a first imaging beam and a second imaging beam, wherein the first imaging beam originates from the first light source, and the second imaging beam originates from the second light source;

determining a first offset of the second lens on a plane perpendicular to the optical axis according to the first included angle;

Obtain the first distance between the position of the first light spot and the position of the second light spot on the imaging plane, wherein the first light spot is formed by the first imaging beam on the imaging plane, and the second light spot is formed by the second imaging beam is formed on the imaging plane;

determining a second offset of the second lens on a plane perpendicular to the optical axis according to the first distance;

determining a third offset according to the first offset and the second offset;

Adjust the position of the second lens on a plane perpendicular to the optical axis according to the third offset to reduce the first included angle and the first distance;

Comparing the first included angle and the preset angle, and the first distance and the preset distance;

When the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, the current optical path adjustment is ended.

The processor may call the optical path adjustment program stored in the memory, and after comparing the first included angle and the preset angle, and the operation of the first distance and the preset distance, further perform the following operations:

When the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, the process of obtaining the first included angle between the first imaging beam and the second imaging beam is returned to step; or,

When the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, determine the comparison between the first included angle and the preset angle, the first distance and the first cumulative execution times of the steps of the preset distance;

Comparing the first cumulative execution times and the first preset times;

When the first cumulative number of executions is less than the first preset number of times, returning to the step of acquiring the first included angle between the first imaging beam and the second imaging beam;

When the first accumulated execution times is greater than or equal to the first preset times, the current optical path adjustment is terminated, and a prompt signal is generated.

The processor may call the optical path adjustment program stored in the memory, and the operation of determining the first offset of the second lens on a plane perpendicular to the optical axis according to the first included angle includes:

determining the second cumulative execution times i of the step of acquiring the first angle between the first imaging beam and the second imaging beam, and denoting the first angle acquired for the i-th time as α _i ;

Comparing the first included angle α _i with the preset angle α ₀ ;

When the first included angle α _i is greater than the preset angle _{α 0} , and the second cumulative execution times _i is greater than _{1 ,} calculate the second the first adjustment coefficient k1 _{i of the second lens when the cumulative execution times is i} ;

Calculate the first offset D1 _i of the second lens when the second cumulative execution times is i according to D1 _i =α _i /k1 _i ;

When the first included angle α _i is greater than the preset angle α ₀ , and the second accumulated execution times i is equal to 1, the second accumulated execution times i calculated according to D1 ₁ =α ₁ /k1 ₁ is 1. the first offset D1 ₁ of the second lens;

Wherein, k1 ₁ is the first adjustment coefficient of the second lens when the second accumulation number is 1.

The processor may call the optical path adjustment program stored in the memory, and the operation of determining the second offset of the second lens on a plane perpendicular to the optical axis according to the first distance includes:

Determine the third cumulative execution times j of the step of obtaining the first distance between the position of the first light spot and the position of the second light spot on the imaging plane, and denote the first distance obtained for the jth time as β _j ;

comparing the first distance β _j with the preset distance β ₀ ;

When the first distance _{β j} is greater than the preset distance β ₀ and the third cumulative execution times _j is greater than ₁ , calculate the _first The second adjustment coefficient k2 _{j of the second lens when the cumulative execution times are j} ;

Calculate the second offset D2 _j of the second lens when the third cumulative execution times is j according to D2 _j =β _j /k2 _j ;

When the first distance β _j is greater than the preset distance β ₀ and the third cumulative execution times j is equal to 1, the third cumulative execution times calculated according to D2 ₁ =β ₁ /k2 ₁ is 1. the second offset D2 ₁ of the second lens;

Wherein, k2 ₁ is the second adjustment coefficient of the second lens when the third cumulative execution times is 1.

The processor may call the optical path adjustment program stored in the memory, and the operation of determining the third offset according to the first offset and the second offset includes:

obtaining a first position adjustment range of the second lens on a plane perpendicular to the optical axis according to the first offset;

obtaining a second position adjustment range of the second lens on a plane perpendicular to the optical axis according to the second offset;

The center of the overlapping area of the first adjustment range and the second adjustment range is determined, and the offset corresponding to the center of the overlapping area is used as the third offset.

The processor can call the optical path adjustment program stored in the memory, and the optical device further includes a variable reflector, the variable reflector is located on the outgoing light path of the first lens, and the variable reflector is located on the The outgoing light path of the second lens;

Before performing the operation of acquiring the first included angle between the first imaging beam and the second imaging beam for the first time, the following operations are also performed:

Adjusting the positions of the first lens and the second lens on a plane perpendicular to the optical axis, so that the third spot formed by the first imaging beam on the variable mirror is located on the variable reflection Within the first preset range of the mirror, the fourth spot formed by the second imaging beam on the variable reflector is located within the second preset range of the variable reflector;

The positions of the first lens and the second lens in the optical axis direction are adjusted so that the first imaging beam is focused on the imaging plane, and the second imaging beam is focused on the imaging plane.

The processor may call the optical path adjustment program stored in the memory to adjust the position of the first lens on a plane perpendicular to the optical axis, so that the first imaging beam forms a third light spot on the variable mirror The operations within the first preset range of the variable mirror include:

The first lens is placed outside the optical path of the optical device, the first light source is controlled to illuminate the variable mirror, and a first image formed by the variable mirror on the imaging plane is acquired ;

obtaining, according to the first image, a first target range corresponding to the first preset range on the imaging plane;

Putting the first lens into the optical path of the optical device to obtain the position of the first light spot;

determining a fourth offset of the first lens according to the first target range and the position of the first light spot;

The position of the first lens on a plane perpendicular to the optical axis is adjusted according to the fourth offset, so that the first light spot is located within the first target range.

The processor may call the optical path adjustment program stored in the memory, and the operation of adjusting the position of the first lens in the direction of the optical axis so that the first imaging beam is focused on the imaging plane includes:

Obtain the relationship between the spot size of the lens and the imaging distance;

determining the first axial position of the first lens in the optical axis direction according to the relationship between the spot size and the imaging distance, and adjusting the first lens to the first axial position;

acquiring the first size of the first light spot when the first lens is located at the first axial position;

determining a second axial position and a third axial position of the first lens in the optical axis direction according to the first size and the relationship between the spot size and the imaging distance;

adjusting the first lens to the second axial position, and acquiring the second size of the first light spot when the first lens is at the second axial position;

adjusting the first lens to the third axial position, and acquiring the third size of the first light spot when the first lens is at the third axial position;

Determine the first minimum spot size among the first size, the second size and the third size, and the first lens is on the optical axis when the spot size of the first light spot is the first minimum spot size the position in the direction as the updated first axial position, and adjust the first lens to the first axial position;

Return to the step of acquiring the first size of the first spot when the first lens is located at the first axial position, until the minimum spot size obtained at the current time is greater than or equal to the minimum spot size obtained at the previous time, or the second distance between the first axial position and the second axial position is less than the minimum adjustable distance, or the third distance between the first axial position and the third axial position is less than the minimum adjustable distance, or the fourth cumulative execution times of the step of acquiring the first size of the first light spot when the first lens is located at the first axial position is greater than or equal to the second preset number of times .

The processor may call the optical path adjustment program stored in the memory, and after performing the operation of adjusting the first lens to the first axial position for the last time, further perform the following operations:

determining the fourth axial position of the first lens in the optical axis direction according to the preset step size and the preset direction, and adjusting the first lens to the fourth axial position;

acquiring the fourth size of the first light spot when the first lens is located at the fourth axial position;

Before and after adjusting the first lens to the fourth axial position, the spot size of the first light spot changes from large to small. The moving direction of the first lens in the direction of the optical axis is used as the updated preset direction ;

Returning to the step of determining the fourth axial position of the first lens in the optical axis direction according to the preset step size and the preset direction, and adjusting the first lens to the fourth axial position, Until the cumulatively acquired number of the fourth size is greater than or equal to a preset number;

According to each fourth axial position of the first lens and the corresponding fourth size, determine the relationship between the updated spot size of the lens and the imaging distance;

According to the updated relationship between the spot size of the lens and the imaging distance, the fifth axial position of the first lens in the optical axis direction is determined, and the first lens is adjusted to the fifth axial position;

acquiring the fifth size of the first light spot when the first lens is located at the fifth axial position;

Determine the second minimum spot size among the first size, the second size, the third size, the fourth size, and the fifth size, and set the spot size of the first spot as the second minimum spot size The position of the first lens in the direction of the optical axis when the spot size is the smallest is used as the focus position of the first lens, and the first lens is adjusted to the focus position.

The processor may call the optical path adjustment program stored in the memory, and adjust the positions of the first lens and the second lens in the direction of the optical axis, so that the first imaging beam is focused on the imaging plane, After the operation of focusing the second imaging beam on the imaging plane, the following operations are also performed:

Adjusting the positions of the first lens and the second lens on a plane perpendicular to the optical axis, so that the third spot formed by the first imaging beam on the variable mirror is located on the variable reflection Within the third preset range of the mirror, the fourth spot formed by the second imaging beam on the variable reflector is located within the fourth preset range of the variable reflector;

Wherein, the third preset range is less than or equal to the first preset range, and the fourth preset range is less than or equal to the second preset range.

The processor can call the optical path adjustment program stored in the memory, and when the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, the current optical path adjustment is ended. Operations include:

When the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, acquire a sixth size of the first light spot and a sixth size of the second light spot seven sizes;

comparing the sixth size with the first preset size, and the seventh size with the second preset size;

When the sixth size is less than or equal to the first preset size, and the seventh size is less than or equal to the second preset size, end the current optical path adjustment;

When the sixth size is larger than the first preset size, or the seventh size is larger than the second preset size, adjusting the first lens and the second lens in the optical axis direction so that the first imaging beam is focused on the imaging plane, and the second imaging beam is focused on the imaging plane.

The above descriptions are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformations made by the contents of the description and drawings of the present invention, or the direct/indirect application Other related technical fields are included in the scope of patent protection of the present invention.

Claims (14)

1. An optical path adjustment method for adjusting an optical path in an optical device, wherein the optical device comprises a first light source, a second light source, a first lens and a second lens, and the first lens is located in the On the outgoing light path of the first light source, the second lens is located on the outgoing light path of the second light source; The optical path adjustment method includes the following steps: acquiring a first angle between a first imaging beam and a second imaging beam, wherein the first imaging beam originates from the first light source, and the second imaging beam originates from the second light source; determining a first offset of the second lens on a plane perpendicular to the optical axis according to the first included angle; Obtain the first distance between the position of the first light spot and the position of the second light spot on the imaging plane, wherein the first light spot is formed on the imaging plane by the first imaging beam, and the second light spot is formed by the second imaging beam is formed on the imaging plane; determining a second offset of the second lens on a plane perpendicular to the optical axis according to the first distance; determining a third offset according to the first offset and the second offset; Adjust the position of the second lens on a plane perpendicular to the optical axis according to the third offset to reduce the first included angle and the first distance; Comparing the first included angle and the preset angle, and the first distance and the preset distance; When the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, the current optical path adjustment is ended. 2. The optical path adjustment method according to claim 1, wherein after the step of comparing the first included angle and the preset angle, and the first distance and the preset distance, the optical path adjustment method further comprises: Include the following steps: When the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, the process of obtaining the first included angle between the first imaging beam and the second imaging beam is returned to step; or, When the first included angle is greater than the preset angle, or the first distance is greater than the preset distance, determine the comparison between the first included angle and the preset angle, the first distance and the first cumulative execution times of the steps of the preset distance; Comparing the first cumulative execution times and the first preset times; When the first cumulative number of executions is less than the first preset number of times, returning to the step of acquiring the first included angle between the first imaging beam and the second imaging beam; When the first accumulated execution times is greater than or equal to the first preset times, the current optical path adjustment is terminated, and a prompt signal is generated. 3. The optical path adjustment method according to claim 1, wherein, according to the first included angle, the step of determining the first offset of the second lens on a plane perpendicular to the optical axis comprises: determining the second cumulative execution times i of the step of acquiring the first angle between the first imaging beam and the second imaging beam, and denoting the first angle acquired for the i-th time as α _i ; Comparing the first included angle α _i with the preset angle α ₀ ; When the first included angle α _i is greater than the preset angle _{α 0} , and the second cumulative execution times _i is greater than _{1 ,} calculate the second the first adjustment coefficient k1 _{i of the second lens when the cumulative execution times is i} ; Calculate the first offset D1 _i of the second lens when the second cumulative execution times is i according to D1 _i =α _i /k1 _i ; When the first included angle α _i is greater than the preset angle α ₀ , and the second accumulated execution times i is equal to 1, the second accumulated execution times i calculated according to D1 ₁ =α ₁ /k1 ₁ is 1. the first offset D1 ₁ of the second lens; Wherein, k1 ₁ is the first adjustment coefficient of the second lens when the second accumulation number is 1. 4. The optical path adjustment method according to claim 1, wherein, according to the first distance, the step of determining the second offset of the second lens on a plane perpendicular to the optical axis comprises: Determine the third cumulative execution times j of the step of obtaining the first distance between the position of the first light spot and the position of the second light spot on the imaging plane, and denote the first distance obtained for the jth time as β _j ; comparing the first distance β _j with the preset distance β ₀ ; When the first distance _{β j} is greater than the preset distance β ₀ and the third cumulative execution times _j is greater than ₁ , calculate the _first The second adjustment coefficient k2 _{j of the second lens when the cumulative execution times are j} ; Calculate the second offset D2 _j of the second lens when the third cumulative execution times is j according to D2 _j =β _j /k2 _j ; When the first distance β _j is greater than the preset distance β ₀ and the third cumulative execution times j is equal to 1, the third cumulative execution times calculated according to D2 ₁ =β ₁ /k2 ₁ is 1. the second offset D2 ₁ of the second lens; Wherein, k2 ₁ is the second adjustment coefficient of the second lens when the third cumulative execution times is 1. 5. The optical path adjustment method according to claim 1, wherein the step of determining a third offset according to the first offset and the second offset comprises: obtaining a first position adjustment range of the second lens on a plane perpendicular to the optical axis according to the first offset; obtaining a second position adjustment range of the second lens on a plane perpendicular to the optical axis according to the second offset; The center of the overlapping area of the first position adjustment range and the second position adjustment range is determined, and the offset corresponding to the center of the overlapping area is used as the third offset. 6. The optical path adjustment method according to any one of claims 1 to 5, wherein the optical device further comprises a variable reflection mirror, and the variable reflection mirror is located on the outgoing optical path of the first lens , and the variable mirror is located on the outgoing light path of the second lens; Before performing the step of acquiring the first angle between the first imaging beam and the second imaging beam for the first time, the optical path adjustment method further includes the following steps: Adjusting the positions of the first lens and the second lens on a plane perpendicular to the optical axis, so that the third spot formed by the first imaging beam on the variable mirror is located on the variable reflection Within the first preset range of the mirror, the fourth spot formed by the second imaging beam on the variable reflector is located within the second preset range of the variable reflector; The positions of the first lens and the second lens in the optical axis direction are adjusted so that the first imaging beam is focused on the imaging plane, and the second imaging beam is focused on the imaging plane. 7 . The optical path adjustment method according to claim 6 , wherein the position of the first lens on a plane perpendicular to the optical axis is adjusted so that the first imaging beam is on the variable mirror. 8 . The step of forming the third light spot within the first preset range of the variable mirror includes: The first lens is placed outside the optical path of the optical device, the first light source is controlled to illuminate the variable mirror, and a first image formed by the variable mirror on the imaging plane is acquired ; obtaining, according to the first image, a first target range corresponding to the first preset range on the imaging plane; Putting the first lens into the optical path of the optical device to obtain the position of the first light spot; determining a fourth offset of the first lens according to the first target range and the position of the first light spot; The position of the first lens on a plane perpendicular to the optical axis is adjusted according to the fourth offset, so that the first light spot is located within the first target range. 8. The optical path adjustment method according to claim 6, wherein the step of adjusting the position of the first lens in the direction of the optical axis so that the first imaging beam is focused on the imaging plane comprises: Obtain the relationship between the spot size of the lens and the imaging distance; determining the first axial position of the first lens in the optical axis direction according to the relationship between the spot size and the imaging distance, and adjusting the first lens to the first axial position; acquiring the first size of the first light spot when the first lens is located at the first axial position; determining a second axial position and a third axial position of the first lens in the optical axis direction according to the first size and the relationship between the spot size and the imaging distance; adjusting the first lens to the second axial position, and acquiring the second size of the first light spot when the first lens is at the second axial position; adjusting the first lens to the third axial position, and acquiring the third size of the first light spot when the first lens is at the third axial position; Determine the first minimum spot size among the first size, the second size and the third size, and the first lens is on the optical axis when the spot size of the first light spot is the first minimum spot size the position in the direction as the updated first axial position, and adjust the first lens to the first axial position; Return to the step of acquiring the first size of the first spot when the first lens is located at the first axial position, until the minimum spot size obtained at the current time is greater than or equal to the minimum spot size obtained at the previous time, or the second distance between the first axial position and the second axial position is less than the minimum adjustable distance, or the third distance between the first axial position and the third axial position is less than the minimum adjustable distance, or the fourth cumulative execution times of the step of acquiring the first size of the first light spot when the first lens is located at the first axial position is greater than or equal to the second preset number of times . 9 . The optical path adjustment method according to claim 8 , wherein after the step of adjusting the first lens to the first axial position is performed for the last time, the method further comprises the following steps: 10 . determining the fourth axial position of the first lens in the optical axis direction according to the preset step size and the preset direction, and adjusting the first lens to the fourth axial position; acquiring the fourth size of the first light spot when the first lens is located at the fourth axial position; Before and after adjusting the first lens to the fourth axial position, the spot size of the first light spot changes from large to small. The moving direction of the first lens in the direction of the optical axis is used as the updated preset direction ; Returning to the step of determining the fourth axial position of the first lens in the optical axis direction according to the preset step size and the preset direction, and adjusting the first lens to the fourth axial position, Until the cumulatively acquired number of the fourth size is greater than or equal to a preset number; According to each fourth axial position of the first lens and the corresponding fourth size, determine the relationship between the updated spot size of the lens and the imaging distance; According to the updated relationship between the spot size of the lens and the imaging distance, the fifth axial position of the first lens in the optical axis direction is determined, and the first lens is adjusted to the fifth axial position; acquiring the fifth size of the first light spot when the first lens is located at the fifth axial position; Determine the second minimum spot size among the first size, the second size, the third size, the fourth size, and the fifth size, and set the spot size of the first spot as the second minimum spot size The position of the first lens in the direction of the optical axis when the spot size is the smallest is used as the focus position of the first lens, and the first lens is adjusted to the focus position. 10 . The optical path adjustment method according to claim 6 , wherein the positions of the first lens and the second lens in the direction of the optical axis are adjusted so that the first imaging beam is focused on 10 . In the imaging plane, after the step of focusing the second imaging beam on the imaging plane, the optical path adjustment method further includes the following steps: Adjusting the positions of the first lens and the second lens on a plane perpendicular to the optical axis, so that the third spot formed by the first imaging beam on the variable mirror is located on the variable reflection Within the third preset range of the mirror, the fourth spot formed by the second imaging beam on the variable reflector is located within the fourth preset range of the variable reflector; Wherein, the third preset range is less than or equal to the first preset range, and the fourth preset range is less than or equal to the second preset range. 11 . The optical path adjustment method according to claim 1 , wherein, when the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, the process ends. 12 . The steps of this optical path adjustment include: When the first included angle is less than or equal to the preset angle, and the first distance is less than or equal to the preset distance, acquire a sixth size of the first light spot and a sixth size of the second light spot seven sizes; comparing the sixth size with the first preset size, and the seventh size with the second preset size; When the sixth size is less than or equal to the first preset size, and the seventh size is less than or equal to the second preset size, end the current optical path adjustment; When the sixth size is larger than the first preset size, or the seventh size is larger than the second preset size, adjusting the first lens and the second lens in the optical axis direction so that the first imaging beam is focused on the imaging plane, and the second imaging beam is focused on the imaging plane. 12. An optical path adjustment device for adjusting an optical path in an optical device, wherein the optical device comprises a first light source, a second light source, a first lens and a second lens, the first lens is located in the On the outgoing light path of the first light source, the second lens is located on the outgoing light path of the second light source; The optical path adjustment device includes a first imaging component, a driving component, a memory, a processor, and an optical path adjustment program stored on the memory and executable on the processor, wherein: The first imaging component is located on the outgoing optical path of the first lens, and the first imaging component is located on the outgoing optical path of the second lens, and the first imaging component is used to receive the first light spot and the second light spot; The driving component is connected with the first lens and the second lens, and the driving component is used to adjust the position of the first lens and the position of the second lens; The steps of the optical path adjustment method according to any one of claims 1 to 11 are implemented when the optical path adjustment program is executed by the processor. 13 . The optical path adjusting device according to claim 12 , wherein the optical device further comprises a variable mirror, the variable mirror is located on the outgoing light path of the first lens, and the variable mirror is 13 . the reflector is located on the outgoing light path of the second lens; The optical path adjustment device also includes: a beam splitter, the beam splitter is located on the outgoing optical path of the variable reflector, and the first imaging component is located on the first outgoing optical path of the beam splitter; A second imaging component, the second imaging component is located on the second outgoing light path of the beam splitter, and the second imaging component is used for receiving the first light spot and the second light spot. 14. The optical path adjustment device according to claim 13, wherein the first imaging component comprises a holographic diffusion screen and a focus calibration camera; The second imaging assembly includes a conjugate lens and a position calibration camera.

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