阅读说明：本技术 一种幅值扫描系统 (Amplitude scanning system ) 是由 俞俊生 姚远 于海洋 陈雨晴 陈晓东 于 2021-06-23 设计创作，主要内容包括：本公开实施例提供了一种幅值扫描系统,该幅值扫描系统包括支撑板、第一馈源结构和第二馈源结构,支撑板水平设置；第一馈源结构与支撑板连接,第一馈源结构包括第一支架、第一接收馈源及第一射频电缆线,第一支架的一端与支撑板连接,另一端与第一接收馈源连接,第一射频电缆线用于连接第一接收馈源与测量仪表；第二馈源结构与支撑板连接,第二馈源结构包括第二支架、第二接收馈源及第二射频电缆线,第二支架的一端与支撑板连接,另一端与第二接收馈源连接,第二射频电缆线用于连接第二接收馈源与测量仪表；沿支撑板长边方向上第一馈源结构与第二馈源结构之间的距离可调,和/或沿支撑板宽边方向上第一馈源结构与第二馈源结构之间的距离可调。(The embodiment of the disclosure provides an amplitude scanning system, which comprises a support plate, a first feed source structure and a second feed source structure, wherein the support plate is horizontally arranged; the first feed source structure is connected with the supporting plate, the first feed source structure comprises a first support, a first receiving feed source and a first radio frequency cable, one end of the first support is connected with the supporting plate, the other end of the first support is connected with the first receiving feed source, and the first radio frequency cable is used for connecting the first receiving feed source with the measuring instrument; the second feed source structure is connected with the supporting plate and comprises a second support, a second receiving feed source and a second radio frequency cable, one end of the second support is connected with the supporting plate, the other end of the second support is connected with the second receiving feed source, and the second radio frequency cable is used for connecting the second receiving feed source with the measuring instrument; the distance between the first feed source structure and the second feed source structure in the direction of the long edge of the support plate is adjustable, and/or the distance between the first feed source structure and the second feed source structure in the direction of the wide edge of the support plate is adjustable.)

1. An amplitude scanning system, comprising:

the supporting plate is horizontally arranged;

the first feed source structure is connected with the supporting plate and comprises a first support, a first receiving feed source and a first radio frequency cable, one end of the first support is connected with the supporting plate, the other end of the first support is connected with the first receiving feed source, and the first radio frequency cable is used for connecting the first receiving feed source with a measuring instrument;

the second feed source structure is connected with the supporting plate and comprises a second support, a second receiving feed source and a second radio frequency cable, one end of the second support is connected with the supporting plate, the other end of the second support is connected with the second receiving feed source, and the second radio frequency cable is used for connecting the second receiving feed source with the measuring instrument;

the distance between the first feed source structure and the second feed source structure in the long edge direction of the supporting plate is adjustable, and/or the distance between the first feed source structure and the second feed source structure in the wide edge direction of the supporting plate is adjustable.

2. The amplitude scanning system of claim 1, wherein the second feed structure further comprises:

the lens support, one end of the said lens support is connected with said shoe plate;

and the lens is connected with the other end of the lens support, and the receiving side of the second receiving feed source is close to the lens.

3. An amplitude scanning system according to claim 2 wherein the second receive feed is located at the focal point of the lens.

4. The amplitude scanning system of claim 2,

the first feed source structure further comprises a first feed source fixing ring, the first feed source fixing ring is fixedly connected with the first support, and the first feed source fixing ring is sleeved on the outer side of the first receiving feed source to be connected with the first receiving feed source and the first support;

the second feed structure still includes the solid fixed ring of second feed and the solid fixed ring of lens, the solid fixed ring of second feed with second support fixed connection, just the solid fixed ring of second feed cup joints the feed outside is received to the second, in order to connect the feed is received to the second reaches the second support, the solid fixed ring of lens with lens support fixed connection, just the solid fixed ring of lens cup joints the lens outside, in order to connect lens with the lens support.

5. The amplitude scanning system of claim 2, further comprising a drive arrangement coupled to the first feed structure and the second feed structure, the drive arrangement configured to drive the first receive feed, the second receive feed, and the lens to move in a vertical direction.

6. The amplitude scanning system of claim 2, wherein the first support, the second support, and the lens support have a plurality of height indicators disposed thereon, each height indicator indicating a height of the first receive feed, the second receive feed, and the lens.

7. The amplitude scanning system of claim 1, further comprising a gantry, the gantry comprising:

a first guide rail extending in a horizontal direction;

a second guide rail extending in a vertical direction, the second guide rail being connected to the first guide rail, and the second guide rail being movable along the first guide rail, the support plate being connected to the second guide rail, and the support plate being movable along the second guide rail.

8. The amplitude scanning system of claim 1, wherein the support plate has a plurality of positioning marks disposed thereon, each positioning mark being configured to indicate a position of the first feed structure and/or the second feed structure.

9. An amplitude scanning system as claimed in claim 1, wherein the first and second radio frequency cable lines are waveguide cable lines.

10. The amplitude scanning system of claim 1, wherein the first and second radio frequency cable lines are coaxial cable lines.

Technical Field

The present disclosure relates to the field of electromagnetic wave technology, and more particularly, to an amplitude scanning system.

Background

At present, due to the performance influence of instrument equipment and a radio frequency connecting line, the amplitude of an electric field can be accurately obtained in the process of measuring electromagnetic waves, and the phase of the electric field cannot be accurately obtained. Specifically, in the process of planar mechanical scanning, the radio frequency connecting line is continuously twisted, so that the measured receiving phase is subjected to unpredictable error change. In order to solve the above problems, a phase-less measurement technique is proposed. The basic principle of phase-less measurement is to measure the electric field amplitude and use an algorithmic solution of the electric field amplitude to derive the phase value. To derive phase values, commonly used research algorithms require measuring the amplitude in two parallel planes at a certain wavelength distance; one particular study algorithm requires measuring the amplitude in one plane and measuring the amplitude in the other parallel plane through the lens structure at the focal point of the lens. Based on this, in order to accurately derive the phase values, it is important to accurately measure the amplitudes in two parallel planes.

In the related art, the amplitude values in two parallel planes are measured by a single-point stepping method or a mechanical movement method. Due to the movement precision error of the scanning machine, the starting and stopping of the single-point stepping each time can cause position error, so that the amplitude value of the expected position cannot be accurately obtained, and the amplitude precision measured in the single-point stepping mode is low. In addition, because the distance between two parallel planes to be measured is usually required to be positive wavelength or half wavelength, the wavelength distance is very small in a millimeter wave or terahertz wave frequency band, if one plane is measured by a mechanical movement method and then is moved to the other parallel plane for scanning, the mechanical movement may generate precision errors, so that the accuracy of the parallel movement distance cannot be ensured, and the measured electric field value is also inaccurate. Therefore, there is a need for an amplitude scanning system that can continuously measure the amplitudes of two parallel planes quickly, efficiently, and accurately.

Disclosure of Invention

An object of the disclosed embodiments is to provide an amplitude scanning system to achieve fast, efficient and accurate continuous measurement of amplitudes of two parallel planes. The specific technical scheme is as follows:

an aspect of the disclosed embodiments provides an amplitude scanning system, including:

the supporting plate is horizontally arranged;

the first feed source structure is connected with the supporting plate and comprises a first support, a first receiving feed source and a first radio frequency cable, one end of the first support is connected with the supporting plate, the other end of the first support is connected with the first receiving feed source, and the first radio frequency cable is used for connecting the first receiving feed source with a measuring instrument;

the second feed source structure is connected with the supporting plate and comprises a second support, a second receiving feed source and a second radio frequency cable, one end of the second support is connected with the supporting plate, the other end of the second support is connected with the second receiving feed source, and the second radio frequency cable is used for connecting the second receiving feed source with the measuring instrument;

the distance between the first feed source structure and the second feed source structure in the long edge direction of the supporting plate is adjustable, and/or the distance between the first feed source structure and the second feed source structure in the wide edge direction of the supporting plate is adjustable.

In some embodiments, the second feed structure further comprises:

the lens support, one end of the said lens support is connected with said shoe plate;

and the lens is connected with the other end of the lens support, and the receiving side of the second receiving feed source is close to the lens.

In some embodiments, the second receive feed is located at a focal point of the lens.

In some embodiments, the first feed structure further includes a first feed fixing ring, the first feed fixing ring is fixedly connected to the first support, and the first feed fixing ring is sleeved outside the first receiving feed to connect the first receiving feed and the first support;

the second feed structure still includes the solid fixed ring of second feed and the solid fixed ring of lens, the solid fixed ring of second feed with second support fixed connection, just the solid fixed ring of second feed cup joints the feed outside is received to the second, in order to connect the feed is received to the second reaches the second support, the solid fixed ring of lens with lens support fixed connection, just the solid fixed ring of lens cup joints the lens outside, in order to connect lens with the lens support.

In some embodiments, the amplitude scanning system further comprises a driving device connected to the first feed structure and the second feed structure, the driving device configured to drive the first receiving feed, the second receiving feed, and the lens to move in a vertical direction.

In some embodiments, a plurality of height markers are disposed on the first support, the second support and the lens support, each height marker being used to indicate the height of the first receiving feed, the second receiving feed and the lens.

In some embodiments, further comprising a gantry, the gantry comprising:

a first guide rail extending in a horizontal direction;

a second guide rail extending in a vertical direction, the second guide rail being connected to the first guide rail, and the second guide rail being movable along the first guide rail, the support plate being connected to the second guide rail, and the support plate being movable along the second guide rail.

In some embodiments, a plurality of positioning marks are disposed on the support plate, and each positioning mark is used for indicating a position of the first feed structure and/or the second feed structure.

In some embodiments, the first and second radio frequency cable lines are waveguide cable lines.

In some embodiments, the first and second rf cable lines are coaxial cable lines.

The embodiment of the disclosure has the following beneficial effects:

the amplitude scanning system provided by the embodiment of the disclosure comprises a support plate, and a first feed source structure and a second feed source structure which are connected with the support plate. The first feed source structure comprises a first support, a first receiving feed source and a first radio frequency cable, and the second feed source structure comprises a second support, a second receiving feed source and a second radio frequency cable. The relative position between the first feed structure and the second feed structure is adjustable. When the phase place of the electric field is measured through the amplitude scanning system that this disclosed embodiment provided, adjust the position between first feed structure and the second feed structure, make along the long limit of backup pad and broadside direction on, first receiving feed and second all have a certain distance between receiving the feed, then remove the backup pad along level and vertical direction respectively, make first receiving feed and second receiving feed that are located on the backup pad receive the amplitude on two parallel planes simultaneously, then confirm the phase place of electric field through the amplitude on these two parallel planes. In the amplitude scanning system provided by the embodiment of the disclosure, amplitudes on two parallel planes can be measured simultaneously, and relative positions between two receiving feed sources are not changed in the measurement process, so that the accuracy of a measurement result is higher, and the amplitude of the two parallel planes can be measured rapidly, efficiently and accurately.

Of course, not all advantages described above need to be achieved at the same time to practice any one product or method of the present disclosure.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other embodiments can be obtained by those skilled in the art according to the drawings.

FIG. 1 is a block diagram of an amplitude scanning system in accordance with some embodiments of the present disclosure;

FIG. 2 is another block diagram of an amplitude scanning system in some embodiments of the present disclosure;

FIG. 3 is a schematic diagram of the operation of an amplitude scanning system in some embodiments of the present disclosure.

Reference numerals: 1-a support plate; 2-a first feed structure; 21-a first scaffold; 22-a first receive feed; 23-a first radio frequency cable line; 24-a first feed holder ring; 3-a second feed structure; 31-a second scaffold; 32-a second receive feed; 33-a second radio frequency cable line; 34-a lens holder; 35-a lens; 36-a second feed fixation ring; 37-a lens-securing ring; 4-a scanning frame; 41-a first guide rail; 42-second guide rail.

Detailed Description

The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments that can be derived from the disclosure by one of ordinary skill in the art based on the embodiments in the disclosure are intended to be within the scope of the disclosure.

In order to achieve fast, efficient and accurate continuous measurement of the amplitudes of two parallel planes, and thus to accurately measure the phase of an electric field, an amplitude scanning system according to an embodiment of the present disclosure is provided.

As shown in fig. 1 and 2, the amplitude scanning system provided by the embodiment of the present disclosure includes a support plate 1, a first feed structure 2, and a second feed structure 3. Wherein, 1 level of backup pad is placed, and first feed structure 2 is connected with backup pad 1, and first feed structure 2 includes first support 21, first receiving feed 22 and first radio frequency cable conductor 23, and first support 21 one end is connected with backup pad 1, and the first support 21 other end is connected with first receiving feed, and first radio frequency cable conductor 23 is used for connecting first receiving feed 22 and measuring instrument. The second feed structure 3 is connected with the support plate 1, the second feed structure 3 comprises a second support 31, a second receiving feed 32 and a second radio frequency cable 33, one end of the second support 31 is connected with the support plate 1, the other end of the second support is connected with the second receiving feed 32, and the second radio frequency cable 33 is used for connecting the second receiving feed 32 and a measuring instrument. The distance between the first feed source structure 2 and the second feed source structure 3 along the long edge direction of the support plate 1 is adjustable, and/or the distance between the first feed source structure 2 and the second feed source structure 3 along the wide edge direction of the support plate 1 is adjustable.

When the phase place of the electric field is measured through the amplitude scanning system that this disclosed embodiment provided, adjust the position between first feed structure 2 and the second feed structure 3 for along the long limit of backup pad 1 and broadside direction, all have a certain distance between first receiving feed 22 and the second receiving feed 32, as shown in fig. 1 and fig. 2, make first receiving feed 22 and second receiving feed 32 not influence each other, and can receive the amplitude of parallel and two planes that have a certain distance. Then, with the ground as a reference surface, the support plate 1 is moved in the horizontal and vertical directions respectively, so that the first receiving feed 22 and the second receiving feed 32 on the support plate 1 receive the amplitudes on two parallel planes simultaneously, then the overlapping area between the two parallel planes is determined, and the phase of the electric field is determined by the amplitudes at each position on the overlapping area.

In the amplitude scanning system provided by the embodiment of the disclosure, amplitudes on two parallel planes can be measured simultaneously, and relative positions between two receiving feed sources are not changed in the measurement process, so that errors of measurement results caused by adjusting the positions of the receiving feed sources in the electric field measurement process are avoided, the accuracy of the measurement results is higher, and the amplitudes of the two parallel planes can be measured quickly, efficiently and accurately in succession.

Specifically, as shown in fig. 1 and fig. 2, the positions of the first feed structure 2 and the second feed structure 3 are adjusted, so that the distance between the first feed structure 2 and the second feed structure 3 is L3 along the long side direction L of the support plate 1, and the first receiving feed 22 and the second receiving feed 32 can receive amplitude values on two planes which are parallel to each other and are spaced from each other by the distance L3. In addition, the first feed structure 2 and the second feed structure 3 are spaced apart by K1 in the broadside direction W of the support plate 1, so that the first receiving feed 22 and the second receiving feed 32 do not affect each other during operation. As shown in fig. 3, after the positions of the first feed structure 2 and the second feed structure 3 are adjusted, the first feed structure 2 and the second feed structure 3 are fixed on the support plate 1. Then the support plate 1 is moved in the vertical direction R1 and the horizontal direction R2, respectively, so that the first receiving feed 22 can collect the amplitudes of the points on the amplitude scan plane S1 and the second receiving feed 32 can collect the amplitudes of the points on the amplitude scan plane S2. Then, an overlapping region S3 between the amplitude scan plane S1 and the amplitude scan plane S2 is acquired, and amplitudes of points on the overlapping region S3 are acquired, so that the phase of the measured electric field is determined based on the amplitudes of the points on the overlapping region S3.

Wherein, after confirming the relative position of first feed structure 2 and second feed structure 3, need fix first feed structure 2 and second feed structure 3 in backup pad 1, relative position between first feed structure 2 and the second feed structure 3 changes when preventing backup pad 1 from removing to influence amplitude measurement's accuracy. Specifically, the first feed structure 2 and the second feed structure 3 are fixed on the support plate 1, that is, the first support 21 and the second support 31 are fixed on the support plate 1.

The connection manner of the first bracket 21 and the second bracket 31 to the support plate 1 is not particularly limited in the embodiment of the present disclosure. In one example, a plurality of limiting grooves may be formed in the supporting plate 1, and the first bracket 21 and the second bracket 31 may be fixed by locking the first bracket 21 and the second bracket 31 in the specific limiting grooves. In another example, the first bracket 21 and the second bracket 31 may be directly fixed to the support plate 1 by a fastener such as a bolt. In another example, the first and second holders 21 and 31 may be magnetically attached to the support plate 1.

In some embodiments, the first and second radio frequency cable lines 23, 33 are waveguide cable lines.

In some embodiments, the first and second radio frequency cable lines 23, 33 are coaxial cable lines. In addition, the first rf cable 23 and the second rf cable 33 may also be microstrip cables, and the like, which is not limited in this disclosure.

In some embodiments, a plurality of positioning marks are provided on the support plate 1, each positioning mark being used to indicate a position of the first feed structure 2 and/or the second feed structure 3.

In the embodiment of the present disclosure, when the relative position between the first feed structure 2 and the second feed structure 3 is adjusted, the positions of the first feed structure 2 and the second feed structure 3 and the distance between the first feed structure 2 and the second feed structure 3 may be determined according to a plurality of positioning identifiers. Wherein, a plurality of location marks can be arranged at the edges of the long side and the short side of the supporting plate 1. For example, a distance L3 between the front and rear of the first feed structure 2 and the second feed structure 3 may be determined according to the location indicator on the long side of the support plate 1, and a distance K1 between the left and right of the first feed structure 2 and the second feed structure 3 may be determined according to the location indicator on the wide side of the support plate 1. A plurality of location signs also can distribute on the surface of backup pad 1 with first feed structure 2 and second feed structure 3 are connected to can more audio-visually see first feed structure 2 and second feed structure 3's position.

In some embodiments, as shown in FIG. 3, the amplitude scanning system further comprises a gantry 4, the gantry 4 comprising a first rail 41 and a second rail 42. Wherein the first guide rail 41 extends in a horizontal direction. The second guide rail 42 extends in a vertical direction, the second guide rail 42 is connected with the first guide rail 41, and the second guide rail 42 is movable along the first guide rail 41, the support plate 1 is connected with the second guide rail 42, and the support plate 1 is movable along the second guide rail 42.

In the embodiment of the present disclosure, the extending directions of the first guide rail 41 and the second guide rail 42 are both referred to the ground. The supporting plate 1 is connected with the second guide rail 42 in a sliding mode, and when the supporting plate 1 moves along the extending direction of the second guide rail 42, the first feed source structure 2 and the second feed source structure 3 on the supporting plate 1 can collect amplitude values of all points on a plane along the vertical direction. The support plate 1 is connected with the second guide rail 41, so when the second guide rail 42 moves along the extending direction of the first guide rail 41, the second guide rail 42 drives the support plate 1 to move along the extending direction of the first guide rail 41, that is, move along the horizontal direction, and the amplitude measurement of the first feed source structure 2 and the second feed source structure 3 along two planes in the horizontal direction is realized.

The first guide rail 41 and the second guide rail 42 may be a C-shaped guide rail, a U-shaped guide rail, a linear guide rail, and the like, which is not particularly limited in this disclosure. The support plate 1 may be connected to the second guide rail 42 through a slider, a traveling wheel, and the like, and similarly, the second guide rail 42 may also be connected to the first guide rail 41 through a slider, a traveling wheel, and the like, which is not particularly limited in the embodiment of the present disclosure.

In addition, the amplitude scanning system may further include a driving device electrically connected to the support plate 1 and the second rail 42. On this basis, the movement of the support plate 1 along the first guide rail 41 can be controlled by the drive means, and the movement of the first guide rail 41 along the second guide rail 42 can be controlled by the drive means. The driving device may further include an automatic locking structure, and based on this, after the supporting plate 1 and the second guide rail 42 move a specific distance, the automatic locking structure controls the supporting plate 1 and the second guide rail 42 to stop, so that the scanning accuracy of the amplitude scanning system is increased.

In some embodiments, as shown in fig. 1, the second feed structure 3 further comprises a lens holder 34 and a lens 35. Wherein one end of the lens holder 34 is connected to the support plate 1. A lens 35 is connected to the other end of the lens holder 34, and the receiving side of the second receiving feed 32 is close to the lens 35. As shown in fig. 1 and 2, the distance L1 between the first receiving feed 22 and the lens 35 and the distance L2 between the lens 35 and the second receiving feed 32 are both adjustable along the long side direction of the support plate 1 and the wide side direction of the support plate 1. The distance between the first receiving feed 22 and the lens 35 and the distance between the lens 35 and the second receiving feed 32 can be adjusted according to actual measurement requirements.

In some embodiments, the second receive feed 32 is located at the focal point of the lens 35.

In the embodiment of the present disclosure, the lens 35 is fixed at the support plate 1 through the lens support 34, and as shown in fig. 1, the lens 35 is located at a side of the second receiving feed 32 close to the first receiving feed 22, and a receiving side of the second receiving feed 32 is close to the lens 35. The second receive feed 32 may be located at the focal point of the lens 35, and the second receive feed 32 may or may not be in contact with the lens 35. When the phase of the electric field is measured by the amplitude scanning system including the lens 35, the distance between the two parallel planes measured by the amplitude scanning system is the distance between the first receiving feed 22 and the lens 35.

In the embodiment of the present disclosure, the second receiving feed source 32 receives the electrical signal after passing through the lens 35, so that the second receiving feed source 32 can receive a planar electrical signal with a larger area, and the fluctuation of the phase in the measured electrical field is reduced, so that the measurement effect of the amplitude scanning system is better. Wherein, since the algorithm for calculating the phase of the measured electric field according to the amplitudes of the two parallel planes is different between the case of including the lens 35 in the amplitude scanning system and the case of not including the lens 35, the lens 35 can be added or removed in the amplitude measuring system according to different application requirements. The lens 35 may be a circular curved lens or a square curved lens, and the like, which is not particularly limited in this disclosure.

In some embodiments, the first feed structure 2 further includes a first feed fixing ring 24, the first feed fixing ring 24 is fixedly connected to the first support 21, and the first feed fixing ring 24 is sleeved outside the first receiving feed 22 to connect the first receiving feed 22 and the first support 21. The second feed structure 3 further comprises a second feed fixing ring 36 and a lens fixing ring 37, the second feed fixing ring 36 is fixedly connected with the second support 31, the second feed fixing ring 36 is sleeved on the outer side of the second receiving feed 32 to be connected with the second receiving feed 32 and the second support 31, the lens fixing ring 37 is fixedly connected with the lens support 34, and the lens fixing ring 37 is sleeved on the outer side of the lens 35 to be connected with the lens 35 and the lens support 34.

In the embodiment of the present disclosure, the first feed fixing ring 24 and the first support 21, the second feed fixing ring 36 and the second support 31, and the lens fixing ring 37 and the lens support 34 may be directly connected, such as welding, bonding, and the like, and the first feed fixing ring 24 and the first support 21, the second feed fixing ring 36 and the second support 31, and the lens fixing ring 37 and the lens support 34 may also be indirectly connected through an intervening component, which is not specifically limited in this embodiment of the present disclosure.

In addition, there are various connection manners of the first receiving feed 22 and the first support 21, the second receiving feed 32 and the second support 31, and the lens 35 and the lens support 34, for example, the first receiving feed is fixedly connected by a fastener such as a bolt, and the second receiving feed is connected by magnetic attraction or adhesion, and the embodiment of the disclosure is not particularly limited thereto.

In some embodiments, the amplitude scanning system further comprises a driving device connected to the first feed structure 2 and the second feed structure 3, the driving device configured to drive the first receiving feed 22, the second receiving feed 32, and the lens 35 to move in the vertical direction.

In the embodiment of the present disclosure, the first support 21, the second support 31 and the lens support 34 may be telescopic rod structures, and the driving device is electrically connected to the first support 21, the second support 31 and the lens support 34 respectively to control the extending or retracting lengths of the first support 21, the second support 31 and the lens support 34, so as to adjust the heights of the first receiving feed 22, the second receiving feed 32 and the lens 35, and adjust the area range of the plane collected by the first receiving feed 22 and the second receiving feed 32. In one example, as shown in fig. 1, the first receiving feed 22, the second receiving feed 32 and the lens 35 may have equal heights, that is, the central points of the first receiving feed 22, the second receiving feed 32 and the lens 35 are located on the same straight line. The driving device includes, but is not limited to, a linear motor, a hydraulic device, a pneumatic device, and the like.

In some embodiments, a plurality of height markers are disposed on the first support 21, the second support 31 and the lens support 34, and each height marker is used for indicating the height of the first receiving feed 22, the second receiving feed 32 and the lens 35. Based on this, when the heights of the first receiving feed 22, the second receiving feed 32 and the lens 35 are adjusted through the driving device, the heights of the first receiving feed 22, the second receiving feed 32 and the lens 35 can be visually observed through a plurality of height marks, so that the heights of the first receiving feed 22, the second receiving feed 32 and the lens 35 can be adjusted more accurately.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only for the preferred embodiment of the present disclosure, and is not intended to limit the scope of the present disclosure. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure are included in the scope of protection of the present disclosure.