Scanning device and imaging system

Abstract

The invention relates to a scanning device and an imaging system, and the device comprises a transmitting module which transmits laser light; the reflection module is used for performing reflection operation on the laser light in different reflection directions in sequence, so that the laser light is irradiated to different positions of the image plate through different reflection light paths in sequence for excitation; the first acquisition module is used for acquiring light path information corresponding to different reflection light paths in advance; the second acquisition module is used for pre-acquiring optical power control information corresponding to different reflection light paths based on pre-acquired optical path information corresponding to different reflection light paths; and the control module is used for performing power control on the laser rays transmitted by the transmitting module on the basis of optical power control information which is acquired in advance and respectively corresponds to different reflection light paths, so that the laser rays are irradiated to different positions of the image plate through the different reflection light paths in sequence to have the same light intensity when excitation is performed. The consistency of excitation conditions at different positions of the image plate can be ensured on the basis of improving the excitation efficiency of the image plate, and the imaging quality is further improved.

Description

Technical Field

[0001] Multiple embodiments of this specification relate to the field of laser scanning imaging technology, and particularly to a scanning device and an imaging system. Background Art

[0002] Indirect digital X-ray imaging technology is a process of converting X-ray imaging into digital images. Different from traditional direct digital X-ray imaging, it captures X-ray images through an intermediate medium and then converts them into digital format. A typical representative of this technology is the Computed Radiography (CR) system, which reflects laser light in different reflection directions through a reflection structure, so that the laser light irradiates different positions of the imaging plate along different reflection optical paths for excitation. Therefore, it is not necessary to adjust the emission direction of the laser light to achieve the excitation of different positions of the imaging plate, thereby improving the excitation efficiency of the imaging plate.

[0003] Therefore, during the implementation of indirect digital X-ray imaging technology, higher requirements are put forward for the excitation process and the imaging process. Summary of the Invention

[0004] Embodiments of this specification provide a scanning device and an imaging system, which can improve the excitation effect and the final imaging quality.

[0005] The technical solution is as follows: In a first aspect, an embodiment of this specification provides a scanning device, including: An emission module that emits laser light; A reflection module that sequentially performs reflection operations on the laser light in different reflection directions, so that the laser light irradiates different positions of the imaging plate along different reflection optical paths for excitation; A first acquisition module that pre-acquires the optical path information corresponding to each of the different reflection optical paths; A second acquisition module that pre-acquires the optical power control information corresponding to each of the different reflection optical paths based on the pre-acquired optical path information corresponding to each of the different reflection optical paths; A control module that performs power control on the laser light emitted by the emission module based on the pre-acquired optical power control information corresponding to each of the different reflection optical paths, so that the light intensities are the same when the laser light irradiates different positions of the imaging plate along different reflection optical paths for excitation.

[0006] As a preferred solution, the emission module also emits calibration light; The second acquisition module also pre-acquires the preset emission power information of the calibration light; The second acquisition module also pre-acquires the theoretical starting induction current of the calibration light based on the preset emission power information of the pre-acquired calibration light. The control module also controls the emission module to emit calibration light based on the preset emission power information pre-acquired. The scanning device includes a first photoelectric conversion unit disposed beside the starting end of the calibration light path to sense the calibration light and generate an actual starting induction current. The second acquisition module also acquires first control calibration information based on the pre-acquired theoretical starting induction current and the actual starting induction current generated by the first photoelectric conversion unit. The control module controls the power of the laser light emitted by the emission module based on the pre-acquired light power control information corresponding to different reflection light paths and the first control calibration information, so that the light intensities are the same when the laser light irradiates different positions of the imaging plate through different reflection light paths for excitation in sequence. And / or the emission module includes a circular aperture structure disposed on the light path of the laser light leading to the reflection module.

[0007] As a preferred solution, the reflection module also performs a reflection operation on the calibration light so that the calibration light irradiates the imaging plate along the calibration light path. The first acquisition module also pre-acquires the light path information of the calibration light path. The second acquisition module also pre-acquires the theoretical end induction current when the calibration light reaches the end of the calibration light path based on the preset emission power information of the pre-acquired calibration light and the light path information of the pre-acquired calibration light path. The scanning device further includes a second photoelectric conversion unit disposed beside the end of the calibration light path to sense the calibration light and generate an actual end induction current. The second acquisition module also acquires second control calibration information based on the pre-acquired theoretical end induction current and the actual end induction current generated by the second photoelectric conversion unit. The control module controls the power of the laser light emitted by the emission module based on the pre-acquired light power control information corresponding to different reflection light paths, the first control calibration information, and the second control calibration information, so that the light intensities are the same when the laser light irradiates different positions of the imaging plate through different reflection light paths for excitation in sequence.

[0008] As a preferred solution, the reflection module includes a galvanometer unit and a reflection unit. The galvanometer unit includes a first plane mirror and a first driving subunit for driving the first plane mirror to rotate to perform reflection operations on the laser light in different reflection directions in sequence. The reflection unit includes a second planar mirror that further reflects the laser light rays that have been reflected by the first planar mirror, so that the laser light rays are sequentially irradiated to different positions of the imaging plate along different reflection optical paths for excitation. The reflection unit further includes an adjustment mechanism that can rotate the second planar mirror to adjust the angle between the second planar mirror and the rotation axis of the first planar mirror. The rotation axis of the first planar mirror is parallel to the first planar mirror, and the rotation axis of the first planar mirror is perpendicular to the emission direction of the laser light rays. The second planar mirror is parallel to the emission direction of the laser light rays.

[0009] As a preferred solution, the optical path information includes at least one of the optical path length information of the reflection optical path, the reflection angle information of the reflection optical path at the first planar mirror, and the reflection angle information of the reflection optical path at the second planar mirror.

[0010] In a second aspect, an embodiment of the present specification provides an imaging system, including a scanning device as described in the first aspect of the above embodiment, further including a detection scanning module that performs a detection scan on the imaging plate to obtain complete scan information on the surface of the imaging plate, and an imaging module that performs imaging based on the complete scan information on the surface of the imaging plate to obtain a target image.

[0011] As a preferred solution, the imaging system further includes a carrying module for carrying the imaging plate, and a driving module that drives the carrying module to move so that the linear excitation range of the scanning device on the imaging plate as a whole moves on the imaging plate, thereby enabling the scanning device to perform a complete excitation on the surface of the imaging plate. The detection scanning module is disposed opposite to the linear excitation range of the scanning device on the imaging plate, and the detection scanning module is disposed at an intermediate position between the height of the reflection module and the height of the imaging plate in the height direction.

[0012] As a preferred solution, the detection scanning module includes a plurality of detection units that are disposed opposite to the linear excitation range of the scanning device on the imaging plate as a whole and are linearly arranged. Each detection unit continuously performs a detection scan on the imaging plate, but only regards the scan information of the imaging plate at this time as valid when its real-time excitation position during the excitation of the imaging plate by the laser light rays is opposite to it.

[0013] As a preferred solution, the imaging system further includes a fourth acquisition module, a marking module, and a masking module. The fourth acquisition module pre-acquires the linear position information corresponding to each of the plurality of detection units. The marking module performs a linear position information marking operation on the scanning information obtained by each of the multiple detection units through detection and scanning, based on the linear position information corresponding to each of the multiple detection units. The mask module performs a MASK masking operation on the scanning information obtained by the detection unit through detection and scanning, based on the real-time excitation position of the laser beam on the imaging plate when the detection unit detects and scans the scanning information. The complete scanning information on the surface of the imaging plate is obtained based on all the scanning information after the linear position information marking operation and the MASK masking operation.

[0014] As a preferred solution, the imaging system further includes a scanning information output module; The scanning information output module outputs the scanning information after the linear position information marking operation and the MASK masking operation row by row to obtain a scanning information file, which is used as the complete scanning information on the surface of the imaging plate. In the scanning information output module, all the scanning information corresponding to the same position on the imaging plate as a whole within the linear excitation range is output in the same row, and all the scanning information corresponding to different positions on the imaging plate as a whole within the linear excitation range is output in different rows.

[0015] The beneficial effects brought by the technical solutions provided in some embodiments of this specification at least include: The reflection module sequentially performs reflection operations on the laser beam in different reflection directions, so that the laser beam irradiates different positions on the imaging plate along different reflection optical paths for excitation. Before performing the reflection operation, the optical path information corresponding to each different reflection optical path is obtained in advance, and based on the optical path information corresponding to each different reflection optical path obtained in advance, the optical power control information corresponding to each different reflection optical path is obtained in advance. Finally, based on the optical power control information corresponding to each different reflection optical path obtained in advance, the power of the laser beam emitted by the emission module is controlled, so that the light intensities of the laser beam irradiating different positions on the imaging plate along different reflection optical paths for excitation are the same, which can improve the excitation efficiency of the imaging plate on the basis of ensuring the consistency of the excitation conditions at different positions on the imaging plate, and further improve the final imaging quality.

[0016] In a laser imaging system, it is best for the laser spot presented on the imaging plate to be circular, because a circular spot has a uniform light intensity distribution and can provide more uniform excitation, thus obtaining a higher-quality image. However, in actual applications, due to the influence of various factors, the spot may present an elliptical or other irregular shape. Therefore, in the embodiments of this specification, a circular aperture structure is provided on the optical path of the laser beam leading to the reflection module to cut off the irregular part of the light beam, so as to obtain a spot closer to a circle, and further achieve a more uniform excitation effect and improve the final imaging quality.

[0017] The transmitting module itself may have power transmission errors. Therefore, by adding a first optoelectronic conversion unit and obtaining first control calibration information based on the theoretically obtained starting induction current and the actually generated starting induction current of the first optoelectronic conversion unit, the transmission power error of the laser emitted by the transmitting module can be compensated.

[0018] Due to the differences in the scanning environment, there are differences in the optical power loss of the laser beam during the process of irradiating the imaging plate. Therefore, by setting a second optoelectronic conversion unit and obtaining second control calibration information based on the theoretically obtained ending induction current and the actually generated ending induction current of the second optoelectronic conversion unit, the power error of the laser beam caused by the scanning environment factors can be compensated.

[0019] A second planar mirror for reflecting the laser beam in cooperation with the first planar mirror is added. Therefore, by adjusting the setting angle of the second planar mirror, the incident angle of the laser beam on the imaging plate can be adjusted to perform a higher-quality excitation and improve the final imaging quality.

[0020] The detection and scanning module is arranged opposite to the linear excitation range of the imaging plate by the scanning device, and the detection and scanning module is arranged at the middle position between the setting height of the reflection module and the setting height of the imaging plate in the height direction to achieve better detection and scanning operations on the imaging plate. And on this basis, by adjusting the setting angle of the second planar mirror, the incident angle of the laser beam on the imaging plate is adjusted, thereby avoiding the reflection and scattered light of the laser beam on the imaging plate from entering the detection and scanning module and affecting the scanning result of the detection and scanning module.

[0021] The light emitted by the luminescent substance on the imaging plate after being excited may scatter in multiple directions, not just directly towards the directly facing detection area. To ensure the integrity of the scanned information, currently, when detecting and scanning the imaging plate, an integral detector is used to uniformly detect and scan the imaging plate. All the scanned information obtained at any scanning moment is regarded as valid, that is, the scanned information obtained from the detection area that does not correspond to the real-time excitation position is also regarded as valid. And based on the real-time excitation position of the laser beam, the scanned information obtained from the real-time detection and scanning is corresponding to the corresponding position on the imaging plate, because in this way, the light emitted by the luminescent substance on the imaging plate after being excited can be completely scanned. However, for the detection area that is not directly facing the real-time excitation position, the signal-to-noise ratio of the scanned information obtained from its detection and scanning is relatively low, and the farther the distance from the real-time excitation position, the lower the signal-to-noise ratio of the scanned information. Finally, the signal-to-noise ratio of the final scanned information obtained by fusing all the scanned information corresponding to this real-time excitation position is also relatively low. Therefore, the present invention creatively proposes a solution of "detecting and scanning the imaging plate by multiple detection units in zones, and each detection unit only regards the scanned information of the imaging plate at this time as valid when the real-time excitation position is directly facing it". Although some valid scanned information is lost, the signal-to-noise ratio of the finally obtained scanned information is improved.

[0022] Especially for the fast excitation scenario (that is, the reflection module needs to quickly perform reflection operations on the laser beam in different reflection directions in sequence, so that the laser beam can quickly irradiate different positions on the imaging plate in different reflection optical paths in sequence for excitation to improve the excitation efficiency), the increase in the laser excitation speed means that the residence time of the laser on each position of the imaging plate is reduced, so the number of received photons is reduced, which in turn leads to a decrease in the intensity of the optical signal generated by the imaging plate, while the noise level remains relatively unchanged, resulting in a decrease in the signal-to-noise ratio; in addition, the response of the detection and scanning module to the laser signal may not be instantaneous and requires a certain time to reach the maximum response. If the laser excitation speed increases, it means that the detection and scanning module may not be able to fully respond to the optical signal emitted from a certain position on the imaging plate, resulting in signal weakening, while the noise level remains relatively unchanged, resulting in a decrease in the signal-to-noise ratio. Therefore, for the above-mentioned fast excitation scenario, the present invention creatively proposes a solution of "detecting and scanning the imaging plate by multiple detection units in zones, and each detection unit only regards the scanned information of the imaging plate at this time as valid when the real-time excitation position is directly facing it". Although some valid scanned information is lost, the signal-to-noise ratio of the finally obtained scanned information is improved. Based on the position situation of the detection units, the positions of the scanned information obtained from the detection and scanning of each of the multiple detection units on the imaging plate can be better located, so as to facilitate subsequent imaging based on the complete scanned information on the surface of the imaging plate.

[0023] At the subsequent data processing level of the imaging module, linear position differentiation of the scanning information obtained by each of the multiple detection units through detection and scanning and differentiation of data validity are achieved, thereby improving the imaging effect.

[0024] At the subsequent data processing level of the imaging module, differentiation of the scanning information corresponding to different positions of the overall linear excitation range on the imaging plate is achieved, thereby improving the imaging effect.

[0025] Currently, in order to ensure the final imaging effect, it is necessary to slow down the excitation speed of the imaging plate and the detection and scanning speed of the detection unit for the imaging plate to ensure sufficient excitation of the imaging plate by the laser beam and sufficient detection and scanning of the imaging plate by the detection unit, thereby ensuring a high signal-to-noise ratio. And due to the power control of the laser beam emitted by the emission module, addition of a circular aperture structure, adjustment of the incident angle of the laser beam at the imaging plate through the second planar mirror, and setting of multiple detection unit partitions to detect and scan the imaging plate in the embodiments of this specification, the signal-to-noise ratio can be significantly improved at the same excitation speed and the same detection and scanning speed, thereby providing a basis for increasing the excitation speed and the detection and scanning speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is a schematic structural diagram of a scanning device provided by an embodiment of this specification.

[0028] Figure 2 It is a schematic structural diagram of an imaging system provided by an embodiment of this specification.

[0029] Figure 3 It is a schematic diagram of the positional relationship between a plurality of linearly arranged detection units and the imaging plate.

[0030] In the figure: 1, emission module; 21, first planar mirror; 22, first drive subunit; 31, second planar mirror; 32, rotation axis mounting hole; 33, mounting cylinder; 4, imaging plate; 5, carrier module; 61, detection and scanning module; 611, detection unit; 62, mounting table; 7, drive module; 8, reflection optical path. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The following will clearly and completely describe the technical solutions in the embodiments of this specification with reference to the drawings in the embodiments of this specification.

[0032] The terms "first", "second", "third", etc. in the specification, claims and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices.

[0033] The following description provides examples and does not limit the scope, applicability or examples set forth in the claims. Changes can be made to the functions and arrangements of the described elements without departing from the scope of the content of this specification. Various processes or components can be appropriately omitted, substituted or added to each example. For example, the described method can be performed in a different order than the described order, and various steps can be added, omitted or combined. In addition, the features described for some examples can be combined into other examples.

[0034] Referring to Figure 1 as shown Figure 1 is a schematic structural diagram of a scanning device provided by an embodiment of this specification. The scanning device may at least include: Emission module 1, which emits laser light rays; Reflection module, which performs reflection operations on the laser light rays in different reflection directions in sequence, so that the laser light rays are irradiated to different positions of the imaging plate 4 in different reflection optical paths 8 in sequence for excitation; First acquisition module, which pre-acquires the optical path information corresponding to each of the different reflection optical paths 8; Second acquisition module, which pre-acquires the optical power control information corresponding to each of the different reflection optical paths 8 based on the optical path information corresponding to each of the different reflection optical paths 8 pre-acquired; Control module, which performs power control on the laser light rays emitted by the emission module 1 based on the optical power control information corresponding to each of the different reflection optical paths 8 pre-acquired, so that the light intensities are the same when the laser light rays are irradiated to different positions of the imaging plate 4 in different reflection optical paths 8 in sequence for excitation.

[0035] The reflection module reflects the laser light in different reflection directions in sequence, so that the laser light irradiates different positions of the imaging plate 4 in different reflection optical paths 8 in sequence for excitation. And before performing the reflection operation, the optical path information corresponding to each of the different reflection optical paths 8 is obtained in advance, and based on the optical path information corresponding to each of the different reflection optical paths 8 obtained in advance, the optical power control information corresponding to each of the different reflection optical paths 8 is obtained in advance. Finally, based on the optical power control information corresponding to each of the different reflection optical paths 8 obtained in advance, the power of the laser light emitted by the emission module 1 is controlled, so that the light intensities are the same when the laser light irradiates different positions of the imaging plate 4 in different reflection optical paths 8 in sequence for excitation. On the basis of improving the excitation efficiency of the imaging plate 4, the consistency of the excitation conditions at different positions of the imaging plate 4 can be ensured, thereby improving the final imaging quality.

[0036] It should be noted that Figure 1 only the main part of the structure of the scanning device is shown. In the actual application process, the scanning device should also have a frame, a housing, etc. that Figure 1 play a supporting and / or protective role for the structure shown in

[0037] It can be understood that for the emission module 1, as the cumulative working time increases, the same power control signal may enable the emission module 1 to finally emit laser light with different optical powers. Because the laser diode or other light-emitting elements in the emission module 1 will age as the use time increases, which may lead to a decrease in its output efficiency.

[0038] Therefore, in some embodiments of this specification, the emission module 1 also emits calibration light; The second acquisition module also pre-acquires the preset emission power information of the calibration light; The second acquisition module also pre-acquires the theoretical starting induction current of the calibration light based on the preset emission power information of the calibration light obtained in advance; The control module also controls the emission module 1 to emit calibration light based on the preset emission power information obtained in advance; The scanning device includes a first photoelectric conversion unit arranged beside the starting end of the calibration light optical path to sense the calibration light and generate an actual starting induction current; The second acquisition module also obtains first control calibration information based on the theoretical starting induction current obtained in advance and the actual starting induction current generated by the first photoelectric conversion unit; The control module controls the power of the laser light emitted by the emission module 1 based on the optical power control information corresponding to each of the different reflection optical paths 8 obtained in advance and the first control calibration information, so that the light intensities are the same when the laser light irradiates different positions of the imaging plate 4 in different reflection optical paths 8 in sequence for excitation.

[0039] It is understandable that there may be power emission errors in the emission module 1 itself. Therefore, by adding a first photoelectric conversion unit and based on the theoretically obtained starting induction current and the actual starting induction current generated by the first photoelectric conversion unit, the first control calibration information is obtained to compensate for the emission power error of the laser emitted by the emission module 1.

[0040] In some embodiments of this specification, the reflection module 1 also performs a reflection operation on the calibration light so that the calibration light irradiates the image plate 4 along the calibration optical path; The first acquisition module also pre-acquires the optical path information of the calibration optical path; The second acquisition module also pre-acquires the theoretical terminal induction current when the calibration light reaches the end of the calibration optical path based on the preset emission power information of the calibration light pre-acquired and the optical path information of the calibration optical path pre-acquired; The scanning device further includes a second photoelectric conversion unit disposed beside the end of the calibration optical path to sense the calibration light and generate an actual terminal induction current; The second acquisition module also obtains the second control calibration information based on the theoretically obtained terminal induction current and the actual terminal induction current generated by the second photoelectric conversion unit; The control module controls the power of the laser light emitted by the emission module 1 based on the pre-acquired optical power control information corresponding to different reflection optical paths 8, the first control calibration information, and the second control calibration information, so that the light intensities are the same when the laser light irradiates different positions of the image plate 4 along different reflection optical paths 8 for excitation in sequence.

[0041] It is understandable that due to the differences in the scanning environment, there are differences in the optical power loss of the laser light during the process of irradiating the image plate 4. Therefore, by setting the second photoelectric conversion unit and based on the theoretically obtained terminal induction current and the actual terminal induction current generated by the second photoelectric conversion unit, the second control calibration information is obtained to compensate for the laser light power error caused by the scanning environment factors.

[0042] In some embodiments of this specification, the emission module 1 includes a circular aperture structure disposed on the optical path of the laser light leading to the reflection module (note: the aperture structure can be directly disposed at the laser emission port of the emission module 1, Figure 1 and this structure is not shown in the figure).

[0043] It can be understood that in a laser imaging system, it is optimal for the laser spot presented on the imaging plate 4 to be circular because a circular spot has a uniform light intensity distribution, which can provide a more uniform excitation, thereby obtaining an image with higher quality. However, in practical applications, due to the influence of various factors, the spot may present an elliptical or other irregular shape. Therefore, in the embodiments of this specification, a circular aperture structure is provided on the optical path where the laser light leads to the reflection module to cut off the irregular part of the light beam, thereby obtaining a spot closer to a circle, and further achieving a more uniform excitation effect and improving the final imaging quality.

[0044] Referring to Figure 1 As shown, in some embodiments of this specification, the reflection module includes a galvanometer unit and a reflection unit; The galvanometer unit includes a first planar mirror 21 and a first driving subunit 22 that drives the first planar mirror 21 to rotate to sequentially perform reflection operations on the laser light in different reflection directions; The reflection unit includes a second planar mirror 31 that further reflects the laser light that has undergone the reflection operation by the first planar mirror 21 so that the laser light is sequentially irradiated to different positions of the imaging plate 4 along different reflection optical paths 8 for excitation; The reflection unit further includes an adjustment mechanism that can rotate the second planar mirror 31 to adjust the angle between the second planar mirror 31 and the rotation axis of the first planar mirror 21; The rotation axis of the first planar mirror 21 is parallel to the first planar mirror 21, and the rotation axis of the first planar mirror 21 is perpendicular to the laser light emission direction, and the second planar mirror 31 is parallel to the laser light emission direction.

[0045] It can be understood that by rotating the first planar mirror 21, reflection operations on the laser light in different reflection directions can be sequentially achieved. And a second planar mirror 31 that cooperates with the first planar mirror 21 to perform reflection operations on the laser light is added. By adjusting the setting angle of the second planar mirror 31, the incident angle of the laser light at the imaging plate 4 can be adjusted to perform higher-quality excitation. The reasons are as follows: 1. The photosensitive characteristics of the imaging plate may vary due to different manufacturers and models. Adjusting the incident angle can optimize the photosensitive effect of the imaging plate, thereby improving the image quality.

[0046] 2. Different imaging applications may have different requirements for the resolution of the image. By adjusting the incident angle, the resolution and contrast of the image can be affected.

[0047] 3. In different imaging environments, the scattering effect may be different. Adjusting the incident angle can help reduce the influence of scattered light on the image quality.

[0048] It should be noted that the angle can also be controlled by the first plane mirror 21, that is, by adjusting the tilt angle of the rotation axis of the first plane mirror 21. However, the rotation of the first plane mirror 21 requires the motor that drives its rotation to be driven together, so it is easy to affect the motor, and affecting the motor will cause a control error in the rotation angle of the first plane mirror 21 by the motor, thereby affecting the excitation of the imaging plate 4 by the laser beam. The adjustment of the second plane mirror 31 does not require the motor to rotate together, so the above problems will not occur.

[0049] The laser beam forms a linear traversal excitation effect on the imaging plate 4 (that is, as the first plane mirror 21 rotates, the laser beam sequentially traverses to each point on the corresponding line on the imaging plate 4 and performs excitation. For example Figure 1 As shown in, the laser beam sequentially reaches points e, f, and g on the imaging plate 4, or the laser beam sequentially reaches points g, f, and e on the imaging plate 4, and the connection line of points e, f, and g is a straight line; it should be noted that in the actual application process, the rotation speed of the first plane mirror 21 is relatively fast, so there are many excitation points between point e and point f, and there are also many excitation points between point f and point g, and in the actual application process, a excitation light beam passing through points e, f, and g will be visually seen on the imaging plate 4).

[0050] Referring to Figure 1 As shown in, the adjusting mechanism for adjusting the angle between the second plane mirror 31 and the rotation axis of the first plane mirror 21 may include an installation cylinder 33, a rotating shaft, and a driving motor for driving the rotating shaft to rotate (note: Figure 1 The rotating shaft and the driving motor are not shown in). In actual application, the rotating shaft is inserted into the rotating shaft installation hole 32 of the installation cylinder 33 and fixedly connected to the inside of the installation cylinder 33, and the second plane mirror 31 can be arranged outside the installation cylinder 33 (for example Figure 1 at the bottom of the installation cylinder 33 shown in), and the rotating shaft should be parallel to the second plane mirror 31. The driving motor drives the rotating shaft to rotate to adjust the angle between the second plane mirror 31 and the rotation axis of the first plane mirror 21.

[0051] Referring to Figure 1 As shown in, for points e, f, and g, the optical path lengths of the three corresponding reflection optical paths 8 are different, the reflection angles at the first plane mirror 21 are different, the reflection angles at the second plane mirror 31 are different, and the above differences will all affect the light intensity when the laser beam reaches the imaging plate 4, thereby affecting the excitation effect on the imaging plate 4.

[0052] For the optical path length, during the propagation of light, its intensity will decrease as the distance increases. This is because when light propagates in a medium, part of the light energy will be absorbed or scattered by the medium. Therefore, the longer the optical path, the more severe the attenuation of the light intensity.

[0053] For the two reflection angles, during the reflection process, the incident angles of the light rays with the mirror surface are different, resulting in different scattering or focusing effects of the light rays during reflection. Therefore, there are differences in the reflection angles, and the focusing effects of the laser light rays when reaching the imaging plate 4 are different, and thus the light intensities are also different.

[0054] Therefore, in some embodiments of the present specification, the optical path information includes at least one of the optical path length information of the reflection optical path 8, the reflection angle information of the reflection optical path 8 at the first planar mirror 21, and the reflection angle information of the reflection optical path 8 at the second planar mirror 31.

[0055] It should be noted that the optical path length information of the reflection optical path 8 and the reflection angle information (the reflection angle information includes the reflection angle information of the reflection optical path 8 at the first planar mirror 21 and the reflection angle information of the reflection optical path 8 at the second planar mirror 31 as described above) are related to the laser light emission direction information of the emission module 1, the position information of the first planar mirror 21, the position information of the second planar mirror 31, the angle information between the axis of rotation of the second planar mirror 31 and the first planar mirror 21, the set height information of the imaging plate 4, and the rotation angle information of the first planar mirror 21 (note: based on the rotation angle information of the first planar mirror 21, the angle between the first planar mirror 21 and the laser light emission route can be obtained).

[0056] It should also be noted that during the actual operation process, for the first planar mirror 21, the angular velocity of its rotation is usually constant. Therefore, there are differences in the spot spacings formed when the laser light rays are sequentially irradiated onto the imaging plate 4 through the first planar mirror 21 and the second planar mirror 31 (the spots at both ends of the imaging plate 4 are sparser, and the spots at the middle position of the imaging plate 4 are denser). Thus, the spot density degrees in different position regions of the imaging plate 4 are different, and further, there are still differences in the number of photons received in different position regions of the imaging plate 4.

[0057] Therefore, in some embodiments, it is also possible to: Pre-obtain the spot density degree information in different position regions of the imaging plate 4 when the first planar mirror 21 rotates at a preset angular velocity; The control module controls the power of the laser beam emitted by the emission module 1 based on the optical power control information corresponding to different reflection optical paths 8 obtained in advance and the spot density information within the position area of the image plate 4 corresponding to different reflection optical paths 8. During the operation of the scanning device, only the rotation angle information of the first planar mirror 21 changes among the above-mentioned relevant information. Therefore, the optical path length information and the reflection angle information of the reflection optical path 8 only change with the change of the rotation angle of the first planar mirror 21. Therefore, each rotation angle of the first planar mirror 21 corresponds to a reflection optical path 8.

[0058] Therefore, only multiple rotation angle values need to be selected within the rotation angle range of the first planar mirror 21, and the optical path length information and the reflection angle information of the reflection optical path 8 corresponding to each of the multiple rotation angle values are calculated in advance. Further, based on the optical path length information and the reflection angle information of the reflection optical path 8 corresponding to each of the multiple rotation angle values (i.e., the optical path information corresponding to different reflection optical paths 8 obtained in advance in the first acquisition module), the optical power control information of the reflection optical path 8 corresponding to each of the multiple rotation angle values is obtained in advance.

[0059] Furthermore, when the control module controls the power of the laser beam emitted by the emission module 1, it only needs to perform real-time power control on the laser beam emitted by the emission module 1 based on the real-time rotation angle of the first planar mirror 21 and the optical power control information of the reflection optical path 8 corresponding to each of the multiple rotation angle values obtained in advance, so that the light intensities when the laser beam irradiates different positions of the image plate 4 through different reflection optical paths 8 in sequence for excitation are the same.

[0060] Refer to Figure 2 as shown in Figure 2 FIG. is a schematic structural diagram of an imaging system provided by an embodiment of the present specification. The imaging system may at least include: A scanning device as described in the above embodiment, further including a detection and scanning module 61 for detecting and scanning the image plate 4 to obtain complete scanning information on the surface of the image plate 4 and an imaging module for imaging based on the complete scanning information on the surface of the image plate 4 to obtain a target image.

[0061] In some embodiments of the present specification, the imaging system further includes a carrying module 5 for carrying the image plate 4, and a driving module 7 for driving the carrying module 5 to move so that the overall linear excitation range of the scanning device on the image plate 4 moves on the image plate 4, thereby realizing the complete excitation of the surface of the image plate 4 by the scanning device (for example Figure 2 as shown in The detection and scanning module 61 is arranged opposite to the linear excitation range of the imaging plate 4 by the scanning device, and the detection and scanning module 61 is arranged at the middle position between the height at which the reflection module is arranged and the height at which the imaging plate 4 is arranged in the height direction.

[0062] It can be understood that the detection and scanning module 61 is arranged opposite to the linear excitation range of the imaging plate 4 by the scanning device (as shown in Figure 1 shown, assuming that the linear excitation range of the imaging plate 4 by the scanning device is from point e to point g, then the detection and scanning module 61 is arranged opposite to the range from point e to point g), and the detection and scanning module 61 is arranged at the middle position between the height at which the reflection module is arranged and the height at which the imaging plate 4 is arranged in the height direction, so as to perform better detection and scanning operations on the imaging plate 4.

[0063] And it should be noted that in practical applications, the direction in which the driving module 7 drives the carrying module 5 to move is preferably perpendicular to the laser light emission route, and the length from point e to point g should be able to cover the width of the imaging plate 4, so as to achieve faster and complete excitation of the imaging plate 4.

[0064] It should also be noted that there is a difference between the wavelength of the laser light and the wavelength of the optical signal excited by the imaging plate 4 after the imaging plate 4 is excited. After the laser light is incident on the imaging plate 4, there may still be partial reflection and scattering and further enter the detection and scanning module 61. And in the actual application process, even if a filter is provided in front of the detection and scanning module 61, it is impossible to filter out all the laser light reflected and scattered by the imaging plate 4, resulting in them acting as noise interference and generating a static background noise in the final target image. Therefore, in order to avoid the above problems, by adjusting the setting angle of the second plane mirror 31, the incident angle of the laser light on the imaging plate 4 can be adjusted, thereby avoiding the reflected light and scattered light of the laser light on the imaging plate 4 from entering the detection and scanning module 61 and affecting the scanning result of the detection and scanning module 61.

[0065] As shown in Figure 3 shown, the detection and scanning module 61 includes a plurality of detection units 611 that are integrally arranged opposite to the linear excitation range of the imaging plate 4 by the scanning device and are linearly arranged, and a mounting table 62 for mounting the plurality of detection units 611; Each detection unit 611 continuously detects and scans the imaging plate 4, but only regards the scanning information of the imaging plate 4 at this time as valid when its real-time excitation position during the excitation process of the imaging plate 4 by the laser light is opposite to it; Or, each detection unit 611 only starts to detect and scan the imaging plate 4 when its real-time excitation position during the excitation process of the imaging plate 4 by the laser light is opposite to it and regards the scanning information of the imaging plate 4 at this time as valid.

[0066] So as toFigure 3 Taking the example shown in the figure, the linear excitation range of the scanning device for the imaging plate 4 in the figure is from point a to point h. That is, the laser beam can reach points a, b, c, d, and h in sequence after being reflected by the first plane mirror 21 and the second plane mirror 31 to excite the imaging plate 4 (note: there are many other excitation points between each adjacent two points). The four detection units 611 are respectively arranged facing the area range from point a to point b, the area range from point b to point c, the area range from point c to point d, and the area range from point d to point h.

[0067] When each detection unit 611 continuously detects and scans the imaging plate 4, but only regards the scanning information of the imaging plate 4 at this time as valid when its real-time excitation position during the excitation process of the laser beam on the imaging plate 4 is directly opposite to it: Then the four detection units 611 are in the normally open state, that is, no matter where the laser beam reaches the imaging plate 4, they simultaneously detect and scan the imaging plate 4, but each detection unit 611 only regards the scanning information of the imaging plate 4 at this time as valid when its real-time excitation position during the excitation process of the laser beam on the imaging plate 4 is directly opposite to it.

[0068] When each detection unit 611 only starts its detection and scanning of the imaging plate 4 when its real-time excitation position during the excitation process of the laser beam on the imaging plate 4 is directly opposite to it and regards the scanning information of the imaging plate 4 at this time as valid: Then the four detection units 611 are not in the normally open state, but only start the detection and scanning of the imaging plate 4 by the detection unit 611 when the real-time excitation position during the excitation process of the laser beam on the imaging plate 4 is directly opposite to the detection unit 611.

[0069] It can be understood that: The light emitted by the luminescent substance on the imaging plate 4 after being excited may scatter in multiple directions, rather than just directly towards the facing detection area. To ensure the integrity of the scanned information, currently, when detecting and scanning the imaging plate 4, an integral detector is used to uniformly detect and scan the imaging plate 4. All the scanned information obtained at any scanning moment is regarded as valid, that is, the scanned information obtained from the detection area not corresponding to the real-time excitation position is also regarded as valid, and the scanned information obtained from the real-time detection and scanning is corresponding to the corresponding position of the imaging plate 4 based on the real-time excitation position of the laser beam, because in this way, the light emitted by the luminescent substance on the imaging plate 4 after being excited can be completely scanned. However, for the detection area not facing the real-time excitation position, the signal-to-noise ratio of the scanned information obtained from its detection and scanning is relatively low, and the signal-to-noise ratio of the scanned information is lower the farther it is from the real-time excitation position. Finally, the signal-to-noise ratio of the final scanned information obtained by fusing all the scanned information corresponding to this real-time excitation position is also relatively low. Therefore, the present invention creatively proposes a solution of "detecting and scanning the imaging plate 4 by dividing it into areas with multiple detection units 611, and each detection unit 611 only regards the scanned information of the imaging plate 4 at this time as valid when the real-time excitation position is facing it". Although some valid scanned information is lost, the signal-to-noise ratio of the finally obtained scanned information is improved.

[0070] Particularly for the fast excitation scenario (that is, the reflection module needs to quickly perform reflection operations on the laser beam in different reflection directions in sequence, so that the laser beam can be quickly irradiated to different positions of the imaging plate 4 in different reflection optical paths 8 in sequence for excitation to improve the excitation efficiency), an increase in the laser excitation speed means a reduction in the residence time of the laser at each position on the imaging plate 4, so the number of received photons decreases, which in turn leads to a decrease in the intensity of the optical signal generated by the imaging plate, while the noise level remains relatively unchanged, resulting in a decrease in the signal-to-noise ratio; in addition, the response of the detection and scanning module to the laser signal may not be instantaneous and requires a certain amount of time to reach the maximum response. If the laser excitation speed increases, it means that the detection and scanning module may not be able to fully respond to the optical signal emitted from a certain position of the imaging plate 4, resulting in signal weakening, while the noise level remains relatively unchanged, resulting in a decrease in the signal-to-noise ratio. Therefore, for the above-mentioned fast excitation scenario, the present invention creatively proposes a solution of "detecting and scanning the imaging plate 4 by dividing it into areas with multiple detection units 611, and each detection unit 611 only regards the scanned information of the imaging plate 4 at this time as valid when the real-time excitation position is facing it". Although some valid scanned information is lost, the signal-to-noise ratio of the finally obtained scanned information is improved.

[0071] Based on the position situation of the detection units 611, the positions of the scanned information obtained from the respective detection and scanning of the multiple detection units 611 on the imaging plate 4 can be better located, so as to facilitate subsequent imaging based on the complete scanned information on the surface of the imaging plate 4.

[0072] The following is illustrated by examples: Suppose that currently the laser beam reaches the position between point a and point b on the imaging plate 4. At this time, the scanning information detected by the detection unit 611 disposed opposite to the area range from point a to point b is regarded as valid, while the three detection units 611 disposed opposite to the other three area ranges do not start detection scanning, or even if they start, the scanning information obtained by their detection scanning is not regarded as valid.

[0073] For the above two methods, it is preferred that the four detection units 611 are in the normally open state. Because the laser transmission speed is very fast, the detection switch control of the detection unit 611 requires high precision, and frequent switching will also reduce the service life of the detection unit 611. And in this mode, the specific scanning information processing method is as follows: Such as Figure 3 As shown, four detection units 611 are used to scan the imaging plate 4 simultaneously. The scanning area is divided into four parts, and each detection unit 611 is matched with four areas one by one. When scanning, only the scanning signal in the corresponding area is scanned. That is to say, when the laser beam irradiates the first area, the four detection units 611 work together, but only the scanning information of the detection unit 611 corresponding to the first area is regarded as the valid signal, and the scanning information received by the other detection units 611 is all invalid signals. And so on for other areas. When finally processing the data, the first two bits of the presented scanning information represent the linear position information, and the four detection units 611 are distinguished by 00, 01, 10, and 11 respectively. 00 represents the scanning information of the first detection unit 611, 01 represents the scanning information of the second detection unit 611, 10 represents the scanning information of the third detection unit 611, and 11 represents the scanning information of the fourth detection unit 611. In the scanning information obtained in the first area, only the first detection unit 611 is valid; in the scanning information obtained in the second area, only the second detection unit 611 is valid; the same is true for the third area and the fourth area.

[0074] Furthermore, for the processing of valid and invalid scanning information, it can be realized by the MASK masking technology, that is, the invalid scanning information is masked to replace the positions of these scanning information with 0.

[0075] Therefore, for the imaging system, it may further include a fourth acquisition module, a marking module, and a masking module; The fourth acquisition module pre-acquires the linear position information corresponding to each of the multiple detection units 611; The marking module performs a linear position information marking operation on the scanning information detected and scanned by each of the multiple detection units 611 based on the linear position information corresponding to each of the multiple detection units 611; The mask module performs a MASK masking operation on the scanning information obtained by detecting and scanning by the detection unit 611 based on the real-time excitation position of the laser beam on the imaging plate 4 when the detection unit 611 detects and scans to obtain scanning information; The complete surface scanning information of the imaging plate 4 is obtained based on all the scanning information after the linear position information marking operation and the MASK masking operation.

[0076] Furthermore, at the subsequent data processing level of the imaging module, linear position differentiation and data validity differentiation are realized for the scanning information obtained by each of the multiple detection units 611 detecting and scanning, thereby improving the imaging effect.

[0077] In some embodiments of this specification, the imaging system further includes a scanning information output module; The scanning information output module outputs the scanning information after the linear position information marking operation and the MASK masking operation row by row to obtain a scanning information file as the complete surface scanning information of the imaging plate; In the scanning information output module, all the scanning information corresponding to the same position of the linear excitation range on the imaging plate 4 as a whole is output in the same row, and all the scanning information corresponding to different positions of the linear excitation range on the imaging plate 4 as a whole is output in different rows.

[0078] It can be understood that in some embodiments of this specification, the scanning information is also output and differentiated row by row according to the different positions of the linear excitation range on the imaging plate 4 as a whole. Furthermore, at the subsequent data processing level of the imaging module, the scanning information corresponding to different positions of the linear excitation range on the imaging plate 4 as a whole is differentiated, thereby improving the imaging effect.

[0079] It should be noted that the specific position on the imaging plate 4 where each row of scanning information corresponds to the linear excitation range as a whole can be obtained in advance according to the setting of the specific operating parameters of the system. The specific operating parameters of the system can include, but are not limited to, the moving direction and moving speed of the driving module 7 driving the carrying module 5.

[0080] In some embodiments of this specification, in the scanning information output module, after outputting all the scanning information corresponding to the same position of the linear excitation range on the imaging plate 4 as a whole, a preset number of line feed flags need to be output and then all the scanning information corresponding to the next position of the linear excitation range on the imaging plate 4 is output with a line break.

[0081] The driving module 7, when a preset number of line feed flags are output in the scanning information output module, drives the carrying module 5 to move so that the linear excitation range of the scanning device on the imaging plate 4 moves to the next position on the imaging plate 4.

[0082] First, by adding a line break flag, the distinguishability between the scanning information corresponding to different positions of the overall linear excitation range on the imaging plate 4 is further increased, and the final imaging effect is further improved.

[0083] Secondly, it is avoided that the driving module 7 drives the carrying module 5 to move before all the scanning information corresponding to a certain position of the overall linear excitation range on the imaging plate 4 is scanned, so that the overall linear excitation range of the scanning device on the imaging plate 4 is moved to the next position on the imaging plate, thereby ensuring the comprehensiveness of the scanning of the imaging plate 4.

[0084] Currently, in order to ensure the final imaging effect, it is necessary to slow down the excitation speed of the imaging plate 4 and the detection scanning speed of the detection unit 611 for the imaging plate 4 to ensure the sufficient excitation of the imaging plate 4 by the laser light and the sufficient detection scanning of the imaging plate 4 by the detection unit 611, thereby ensuring a high signal-to-noise ratio. And due to the power control of the laser light emitted by the emission module 1, the addition of a circular aperture structure, the adjustment of the incident angle of the laser light at the imaging plate 4 through the second plane mirror 31, and the arrangement of multiple detection units 611 to detect and scan the imaging plate 4 in zones in the embodiments of this specification, the signal-to-noise ratio can be greatly improved under the same excitation speed and the same detection scanning speed, thereby providing a basis for increasing the excitation speed and the detection scanning speed.

[0085] In some embodiments of this specification, the imaging system further includes a calibration module for performing a flat-field calibration operation on the target image to obtain a flat-field calibration image.

[0086] Step 1: Use an X-ray machine to continuously take 30 blank images after exposure to obtain 30 bright-field images, and obtain a bright-field average image after mean processing; Step 2: Collect 30 images under darkroom conditions to obtain 30 blank dark-field images, and obtain a dark-field average image after mean processing; Step 3: Subtract the dark-field average image from the bright-field average image to obtain a bright-field calibration image, and calculate the Mean value of the bright-field calibration image Step 4: Subtract the dark-field average image from the target image, then divide the result by the bright-field calibration image, multiply by the Mean value after obtaining the bias matrix to obtain the final flat-field calibration image.

[0087] Therefore, the calibration module includes a bright-field average image acquisition unit, a dark-field average image acquisition unit, a Mean value calculation unit, and a calibration unit; The bright-field average image acquisition unit acquires the bright-field average image; The dark-field average image acquisition unit acquires the dark-field average image; The Mean value calculation unit calculates the Mean value of the bright-field calibration image based on the bright-field average image and the dark-field average image; A correction unit corrects a target image based on the bright field average image, the dark field average image, and the Mean value of the bright field calibration image to obtain a flat field corrected image.

[0088] In some embodiments of this specification, since the working states of the emission module 1, the detection and scanning module 61, and the reflection module in the scanning device or imaging system are affected by temperature changes, and the image imaging effect is related to the working states of the above modules, maintaining a stable temperature is crucial for image quality. In the embodiments of this specification, a temperature control circuit is provided in the scanning device or imaging system to monitor the working temperature in real time and give feedback. When the temperature is too high, cooling measures are started. For example, an air duct design is added to accelerate gas exchange and flow, or a thermoelectric cooler is used to actively dissipate heat from the detection and scanning module 61 (note: in some other embodiments, preheating can also be performed to improve environmental adaptability). Taking the detection and scanning module 61 as an example, when it works, each time the detection and scanning module 61 outputs a photocurrent, a feedback with a nanosecond level of 10 to the power of minus 9 is added to the detection and scanning module 61, and the temperature change is collected and fed back to the drive voltage control end in the detection and scanning module 61 to compensate the voltage in real time, thereby ensuring the working stability of the detection and scanning module 61 when the temperature changes.

[0089] The above-described embodiments are only described in terms of the preferred embodiments of this specification, and do not limit the scope of this specification. Without departing from the design spirit of this specification, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of this specification shall fall within the protection scope determined by the claims of this specification.

Claims

1. A scanning device, characterized in that, Comprising: A transmitting module that emits laser light rays; A reflection module that sequentially performs reflection operations on the laser light rays in different reflection directions, so that the laser light rays sequentially irradiate different positions of the imaging plate along different reflection optical paths for excitation; A first acquisition module that pre-acquires the optical path information corresponding to each of the different reflection optical paths; A second acquisition module that pre-acquires the optical power control information corresponding to each of the different reflection optical paths based on the pre-acquired optical path information corresponding to each of the different reflection optical paths; A control module that controls the power of the laser light rays emitted by the transmitting module based on the pre-acquired optical power control information corresponding to each of the different reflection optical paths, so that the light intensities are the same when the laser light rays sequentially irradiate different positions of the imaging plate along different reflection optical paths for excitation.

2. The scanning device according to claim 1, characterized in that, The transmitting module further emits calibration light rays; The second acquisition module further pre-acquires the preset emission power information of the calibration light rays; The second acquisition module further pre-acquires the theoretical starting induction current of the calibration light rays based on the pre-acquired preset emission power information of the calibration light rays; The control module further controls the transmitting module to emit calibration light rays based on the pre-acquired preset emission power information; The scanning device includes a first photoelectric conversion unit disposed beside the starting end of the calibration light ray optical path to sense the calibration light ray and generate an actual starting induction current; The second acquisition module further acquires first control calibration information based on the pre-acquired theoretical starting induction current and the actual starting induction current generated by the first photoelectric conversion unit; The control module controls the power of the laser light rays emitted by the transmitting module based on the pre-acquired optical power control information corresponding to each of the different reflection optical paths and the first control calibration information, so that the light intensities are the same when the laser light rays sequentially irradiate different positions of the imaging plate along different reflection optical paths for excitation; And / or the transmitting module includes a circular aperture structure disposed on the optical path of the laser light rays leading to the reflection module.

3. An imaging system according to claim 2, wherein, The reflection module further performs a reflection operation on the calibration light rays, so that the calibration light rays irradiate the imaging plate along a calibration optical path; The first acquisition module further pre-acquires the optical path information of the calibration optical path; The second acquisition module further pre-acquires the theoretical end induction current when the calibration light rays reach the end of the calibration optical path based on the pre-acquired preset emission power information of the calibration light rays and the pre-acquired optical path information of the calibration optical path; The scanning device further includes a second photoelectric conversion unit disposed beside the end of the calibration optical path to sense the calibration light ray and generate an actual end induction current; The second acquisition module further acquires second control calibration information based on the pre-acquired theoretical end induction current and the actual end induction current generated by the second photoelectric conversion unit; The control module controls the power of the laser light rays emitted by the transmitting module based on the pre-acquired optical power control information corresponding to each of the different reflection optical paths, the first control calibration information, and the second control calibration information, so that the light intensities are the same when the laser light rays sequentially irradiate different positions of the imaging plate along different reflection optical paths for excitation.

4. A scanning device according to claim 1, characterized in that, The reflection module includes a galvanometer unit and a reflection unit; The galvanometer unit includes a first planar mirror and a first driving subunit that drives the first planar mirror to rotate to sequentially perform reflection operations on the laser beam in different reflection directions. The reflection unit includes a second planar mirror that further reflects the laser beam that has undergone the reflection operation by the first planar mirror, so that the laser beam sequentially irradiates different positions of the imaging plate along different reflection optical paths for excitation. The reflection unit further includes an adjustment mechanism that can rotate the second planar mirror to adjust the angle between the rotation axis of the second planar mirror and the rotation axis of the first planar mirror. The rotation axis of the first planar mirror is parallel to the first planar mirror, and the rotation axis of the first planar mirror is perpendicular to the laser beam emission direction. The second planar mirror is parallel to the laser beam emission direction.

5. A scanning device according to claim 4, characterized in that, The optical path information includes at least one of the optical path length information of the reflection optical path, the reflection angle information of the reflection optical path at the first planar mirror, and the reflection angle information of the reflection optical path at the second planar mirror.

6. An imaging system, characterized in that, A scanning device as described in any one of claims 4 or 5 further includes a detection scanning module that performs a detection scan on the imaging plate to obtain complete scan information on the surface of the imaging plate, and an imaging module that forms an image based on the complete scan information on the surface of the imaging plate to obtain a target image.

7. An imaging system according to claim 6, characterized in that, The imaging system further includes a carrying module for carrying the imaging plate, and a driving module that drives the carrying module to move so that the linear excitation range of the scanning device on the imaging plate moves as a whole on the imaging plate, thereby enabling the scanning device to perform a complete excitation on the surface of the imaging plate. The detection scanning module is disposed opposite to the linear excitation range of the scanning device on the imaging plate, and the detection scanning module is disposed at an intermediate position in the height direction between the height at which the reflection module is disposed and the height at which the imaging plate is disposed.

8. An imaging system according to claim 7, wherein The detection scanning module includes a plurality of detection units that are disposed opposite to the linear excitation range of the scanning device on the imaging plate as a whole and are linearly arranged. Each detection unit continuously performs a detection scan on the imaging plate, but only regards the scan information of the imaging plate at this time as valid when its real-time excitation position during the excitation of the imaging plate by the laser beam is opposite to it.

9. An imaging system according to claim 8, wherein The imaging system further includes a fourth acquisition module, a marking module, and a masking module. The fourth acquisition module pre-acquires the linear position information corresponding to each of the plurality of detection units. The marking module performs a linear position information marking operation on the scan information obtained by each of the plurality of detection units through detection scanning based on the linear position information corresponding to each of the plurality of detection units. The masking module performs a MASK masking operation on the scan information obtained by the detection unit through detection scanning based on the real-time excitation position of the laser beam on the imaging plate when the detection unit obtains the scan information. The complete scan information on the surface of the imaging plate is obtained based on all the scan information after the linear position information marking operation and the MASK masking operation.

10. An imaging system according to claim 9, wherein, The imaging system further includes a scan information output module. The scanning information output module outputs the scanning information after the linear position information marking operation and the MASK masking operation line by line to obtain a scanning information file as the complete scanning information on the surface of the imaging plate; In the scanning information output module, all the scanning information corresponding to the same position of the overall linear excitation range on the imaging plate is output in the same line, and all the scanning information corresponding to different positions of the overall linear excitation range on the imaging plate is output in different lines.

Images