CN111338096B - Exciting light three-dimensional focusing scanning system and image scanning method thereof - Google Patents
Exciting light three-dimensional focusing scanning system and image scanning method thereof Download PDFInfo
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Abstract
The invention discloses an exciting light three-dimensional focusing scanning system and an image scanning method thereof, belonging to the technical field of excitation of frequency up-conversion luminescent materials, and comprising a main controller, an exciting light scanning subsystem and a dynamic focusing subsystem; the image processing and acquisition module inputs a target 3D model image, and the image processing and acquisition module performs slice processing on the image and transmits the image to the main controller; the main controller processes and plans an image scanning path, and sends a control instruction to the excitation light scanning subsystem and the dynamic focusing subsystem; after the excitation light scanning subsystem receives the instruction of the main controller, the excitation light source is started to emit excitation light, so that two-dimensional plane scanning of the excitation light of the up-conversion luminescent medium is realized; and after receiving the instruction of the main controller, the dynamic focusing subsystem realizes the three-dimensional scanning of the exciting light. The function cooperation of each subsystem in the system can realize the dynamic two-dimensional and three-dimensional scanning of the focused exciting light, and further realize the dynamic true three-dimensional display in the up-conversion light-emitting block medium.
Description
Technical Field
The invention belongs to the technical field of excitation of frequency up-conversion luminescent materials, and particularly relates to an excitation light three-dimensional focusing scanning system and an image scanning method thereof.
Background
Multi-photon frequency up-conversion luminescence is an anti-stokes luminescence process. The display technology based on the up-conversion light-emitting principle can realize true three-dimensional display of multi-person multi-angle real-time observation without the help of external equipment such as glasses, helmets and the like. The technology is an up-conversion light-emitting mechanism based on a transparent medium. The luminescence center in the medium absorbs the energy of a plurality of infrared excitation light photons to realize up-conversion visible light emission, and visible light spots can be observed in an excitation light focus prescription with higher power density. And on the light path of the exciting light, the luminous centers in the medium cannot be effectively excited due to the small power density of the exciting light, so that the medium does not display the luminous effect. The visible light spots of the medium at the excitation light focus are called as pixel points, and the visible light spots can be displayed at any position in the medium by controlling the space coordinates of the excitation light focus. By utilizing the principle, the three-dimensional transmission device of the auxiliary laser light source can realize true three-dimensional display in the transparent medium. At present, in the field of material preparation, up-conversion luminescent bulk dielectric materials with excellent optical properties have been prepared by means of improving a crystal growth technology, preparing an organic-inorganic composite material doped with nanoparticles and the like. However, how to realize the point focusing of the excitation light, the tunable up-conversion luminescence intensity of the pixel point, the dynamic display of the pixel point and the like in the transparent block material is still a technical difficulty in the up-conversion true three-dimensional display field.
Disclosure of Invention
The invention relates to an excitation light three-dimensional focusing scanning system based on an up-conversion light-emitting mechanism made of a transparent medium material and an auxiliary three-dimensional transmission device, which is designed and prepared to solve the problems that excitation light is not focused in a point shape and pixel points cannot be dynamically scanned in a two-dimensional and three-dimensional manner in the image display process, and the like, and realizes dynamic true three-dimensional display in an up-conversion medium on a transparent block.
The invention provides a system structure of a device through the following technical scheme:
an excitation light three-dimensional focusing scanning system: the device comprises a main controller, a storage module, an image processing and collecting module, an excitation light scanning subsystem, a distance measuring sensor and a dynamic focusing subsystem; the main controller is respectively connected with the storage module, the image processing and collecting module, the exciting light scanning subsystem, the distance measuring sensor and the dynamic focusing subsystem; the image processing and acquisition module is used for inputting a target 3D model image, slicing software in the image processing and acquisition module is used for carrying out slicing processing on the 3D model image, generated 3D image slice data is stored in the storage module, and meanwhile, the slice data is transmitted to the main controller; the main controller processes the 3D model image data sent by the storage module, plans an image scanning path and sends a control instruction to the excitation light scanning subsystem and the dynamic focusing subsystem; after the excitation light scanning subsystem receives the instruction of the main controller, the excitation light source is started to emit excitation light, so that two-dimensional plane scanning of the excitation light of the up-conversion luminescent medium is realized; after receiving the instruction of the main controller, the dynamic focusing subsystem controls a stepping motor connected with a focusing lens group in the dynamic focusing subsystem to be started, so that a movable lens in the focusing lens group moves along the light path direction, the focus position of exciting light is changed, the focus plane of the exciting light moves along the Z-axis direction, and the dynamic focusing subsystem is used for realizing exciting light three-dimensional scanning of an up-conversion luminescent medium; the distance measuring sensor is used for detecting the distance from a lens of an excitation light source in the excitation light scanning subsystem to an excitation light focal plane in the upconversion luminescent medium and sending a feedback signal to the main controller, and the main controller processes the signal and then corrects a control instruction sent by the dynamic focusing subsystem in real time.
Furthermore, the excitation light scanning subsystem is composed of an excitation light source 1, a beam expander 2, a scanning vibration mirror group 3 and an F-Theta field lens 4; after being expanded by the beam expander 2, the excitation light emitted by the excitation light source 1 is focused by the dynamic focusing subsystem and reflected by the scanning vibrating mirror group, and then is projected to the position of a laser focal plane in the upconversion luminescent medium through the F-Theta field lens 4.
Further, the scanning mirror group 3 is composed of an X-axis reflector, a Y-axis reflector and two stepping motors, and the two stepping motors respectively control the rotation of the X-axis reflector and the Y-axis reflector; and the instruction of the main controller is transmitted to the scanning vibration mirror group to control the scanning vibration mirror group to drive the stepping motors of the X-axis reflector and the Y-axis reflector to scan according to the slice data instruction, so that the two-dimensional plane scanning of the excitation light of the up-conversion luminescent medium can be realized.
The excitation light source 1 is a semiconductor laser diode or a fiber laser; the beam expander 2 is used for reducing the divergence angle of the exciting light beam by enlarging the radius of the exciting light beam so as to reduce the energy loss of the light beam; the scanning vibration mirror group 3 is used for realizing the scanning of the exciting light on a two-dimensional plane; the F-Theta field lens 4 is used for eliminating a focusing error generated by a spherical field in a track of a two-dimensional scanning spot in the excitation light scanning subsystem, so that an excitation light beam uniformly irradiates on a two-dimensional plane, and the effect of static compensation on the optical path of the excitation light is realized.
Furthermore, the dynamic focusing subsystem is composed of a focusing lens group 5 and a focusing lens transmission stepping motor; the focusing lens group 5 is composed of a positive lens and a negative lens, the focusing lens drive stepping motor is connected with the negative lens, exciting light is focused in a medium material through the focusing lens group 5, the main controller sends an instruction to control the focusing lens drive stepping motor to enable the negative lens to move along the light path direction, the movement distance of the negative lens is controlled to change the focal position of exciting light beams passing through the whole lens group, and therefore the focal plane of the exciting light is controlled to move along the Z-axis direction, and three-dimensional scanning of the exciting light can be achieved.
The main controller is used for receiving the graphic slice data of the image processing and acquisition module and converting the graphic slice data into a command acceptable by the singlechip; the scanning vibration mirror group is used for sending a scanning deflection instruction to the excitation light scanning subsystem and controlling the deflection of the excitation light beam on a two-dimensional plane; and the system is used for receiving the measurement and feedback information of the distance measuring sensor, processing data and sending an instruction to control the movement of the stepping motor in the dynamic focusing subsystem.
The invention also provides an image scanning method of the excitation light three-dimensional focusing scanning system, which comprises the following specific steps:
the method comprises the following steps: inputting a target 3D model image into an image processing and acquiring module, carrying out slicing processing on the image model by slicing software in the image processing and acquiring module, storing generated 3D image slice data in a storage module, and transmitting the slice data to a main controller; the main controller receives and processes the image data output from the storage module and plans the scanning path of the whole scanning system; the main controller processes the image slice data sent by the storage module, plans an image scanning path and sends a control instruction to the excitation light scanning subsystem and the dynamic focusing subsystem;
step two: after the exciting light scanning subsystem receives a control signal of the main controller, the exciting light source is started to emit exciting light; when the exciting light passes through the collimation beam expander, the light beam is expanded and shaped to obtain a collimated light beam; then the exciting light beam passes through a focusing lens group 5 of the dynamic focusing subsystem, so that the exciting light beam is focused; the focused excitation light beam sequentially passes through X-axis and Y-axis reflectors of a scanning vibration mirror group 3 in the excitation light scanning subsystem, and the main controller reads image slice data and respectively sends control instructions to X-axis and Y-axis control stepping motors to realize two-dimensional plane scanning of the excitation light beam on a focal plane; a main controller sends a control instruction to a stepping motor in transmission connection with a dynamic focusing mirror lens in the focusing mirror group 5, and the distance between the front lens and the rear lens is changed, so that the focal plane of the exciting light beam is regulated and controlled to move along the Z axis, and the three-dimensional scanning of the exciting light beam is realized;
step three: the distance from an excitation light source lens of an excitation light scanning subsystem to an excitation light focal plane in the upconversion luminescent medium is measured by using a ranging sensor, and a feedback signal is sent to the main controller; the main controller processes the signals and then sends control instructions to the dynamic focusing subsystem for real-time correction; all subsystems of the whole exciting light three-dimensional focusing scanning system work cooperatively to perform reciprocating scanning to form a complete three-dimensional graph, so that dynamic true three-dimensional display in the up-conversion luminescent medium is realized.
Compared with the prior art, the invention has the following advantages:
the invention solves the problem that the punctiform focusing can not be kept all the time in the exciting light scanning process in the field of up-conversion true three-dimensional display, and the dynamic two-dimensional and three-dimensional scanning of the focused exciting light can be realized through the function cooperation of all subsystems in the system, thereby realizing the dynamic true three-dimensional display in an up-conversion light-emitting block medium.
Drawings
FIG. 1 is a schematic flow chart of an image processing and collecting module of an excitation light three-dimensional focusing scanning system according to the present invention;
FIG. 2 is a light path diagram of an excitation light three-dimensional focusing scanning system according to the present invention;
FIG. 3 is a functional block diagram of an excitation light three-dimensional focusing scanning system according to the present invention;
FIG. 4 is a schematic structural diagram of an excitation light three-dimensional focusing scanning system according to the present invention;
in the figure: the device comprises an excitation light source 1, a beam expander 2, a scanning galvanometer 3, an F-Theta field lens 4, a focusing lens group 5, a main controller 6, an excitation light scanning subsystem 7, a distance measuring sensor 8 and a dynamic focusing subsystem 9.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Example 1
The excitation light three-dimensional focusing scanning system realizes true three-dimensional display based on the up-conversion luminescence principle. The luminescence center in the medium absorbs the energy of a plurality of infrared excitation light photons to realize up-conversion visible light emission, and visible light spots can be observed in an excitation light focus prescription with higher power density. And on the light path of the exciting light, the luminous centers in the medium cannot be effectively excited due to the small power density of the exciting light, so that the medium does not display the luminous effect. This requires that the excitation light be kept in a point-like focus at all times during the dynamic three-dimensional scan.
An excitation light three-dimensional focusing scanning system: the device comprises a main controller, a storage module, an image processing and collecting module, an excitation light scanning subsystem, a distance measuring sensor and a dynamic focusing subsystem; the main controller is respectively connected with the storage module, the image processing and collecting module, the exciting light scanning subsystem, the distance measuring sensor and the dynamic focusing subsystem; the image processing and acquisition module is used for inputting a target 3D model image, slicing software in the image processing and acquisition module is used for carrying out slicing processing on the 3D model image, generated 3D image slice data is stored in the storage module, and meanwhile, the slice data is transmitted to the main controller; the main controller processes the 3D model image data sent by the storage module, plans an image scanning path and sends a control instruction to the excitation light scanning subsystem and the dynamic focusing subsystem; after the excitation light scanning subsystem receives the instruction of the main controller, the excitation light source is started to emit excitation light, so that two-dimensional plane scanning of the excitation light of the up-conversion luminescent medium is realized; the dynamic focusing subsystem can control a stepping motor connected with the focusing lens group after receiving the instruction of the main controller, so that a movable lens in the focusing lens group moves along the light path direction, the focus position of the exciting light is changed, the focus plane of the exciting light moves along the Z-axis direction, and the dynamic focusing subsystem is used for realizing the exciting light three-dimensional scanning of the up-conversion luminescent medium; the distance measuring sensor is used for detecting the distance from a lens of an excitation light source in the excitation light scanning subsystem to an excitation light focal plane in the upconversion luminescent medium and sending a feedback signal to the main controller, and the main controller processes the signal and then corrects a control instruction sent by the dynamic focusing subsystem in real time.
As shown in fig. 1, as an image processing and collecting module, firstly, a required 3D display image is designed by graphic software on a computer, then, slicing processing is performed on the 3D image by slicing software (the 3D image is sliced layer by using the slicing software, each slice can be regarded as a two-dimensional plane graph), and generated corresponding data is stored in a storage module and is communicated to a main controller for identification and reading.
As shown in fig. 2, an optical path diagram of an excitation light three-dimensional focusing scanning system; after the main controller sends an instruction, the main controller controls the excitation light source 1 to start emitting tunable excitation light, the excitation light sequentially passes through the beam expanding lens 2 (the light beam is expanded and shaped to obtain a collimated light beam), the focusing lens group 5 (focuses the excitation light beam), the scanning vibrating lens 3 and the F-Theta field lens 4, and the point-shaped focusing is carried out on the medium of the up-conversion light-emitting block. The instruction of the main controller is transmitted to the scanning galvanometer 3, and the scanning galvanometer controls the stepping motor which drives the X-axis lens and the Y-axis lens to scan according to the slice data instruction, so that the two-dimensional plane scanning of a certain excitation light focusing plane can be realized. The main controller issues control instructions to a stepping motor which is in transmission connection with a dynamic focusing mirror lens in the focusing mirror group 5, and the distance between the front lens and the rear lens is changed, so that the focal plane of the exciting light beam is regulated and controlled to move along the Z axis, and the three-dimensional scanning of the exciting light beam is realized. The accurate control of the excitation light focus is to detect the distance from an excitation light source lens in an excitation light scanning subsystem to an excitation light focus plane in an up-conversion luminescent medium through a ranging sensor and send a feedback signal to a main controller, and the main controller processes the signal and then corrects a control instruction sent by a dynamic focusing subsystem in real time.
The exciting light scanning subsystem consists of an exciting light source 1, a beam expanding lens 2, a scanning vibration lens group 3 and an F-Theta field lens 4; after being expanded by the beam expander 2, the excitation light emitted by the excitation light source 1 is focused by the dynamic focusing subsystem and reflected by the scanning vibrating mirror group, and then is projected to the position of a laser focal plane in the upconversion luminescent medium through the F-Theta field lens 4.
The scanning vibration mirror group 3 consists of an X-axis reflector, a Y-axis reflector and two stepping motors, and the two stepping motors respectively control the rotation of the X-axis reflector and the Y-axis reflector; and the instruction of the main controller is transmitted to the scanning vibration mirror group to control the scanning vibration mirror group to drive the stepping motors of the X-axis reflector and the Y-axis reflector to scan according to the slice data instruction, so that the two-dimensional plane scanning of the excitation light of the up-conversion luminescent medium can be realized.
The excitation light source 1 is a semiconductor laser diode or a fiber laser; the beam expander 2 is used for reducing the divergence angle of the exciting light beam by enlarging the radius of the exciting light beam so as to reduce the energy loss of the light beam; the scanning vibration mirror group 3 is used for realizing the scanning of the exciting light on a two-dimensional plane; the F-Theta field lens 4 is used for eliminating a focusing error generated by a spherical field in a track of a two-dimensional scanning spot in the excitation light scanning subsystem, so that an excitation light beam uniformly irradiates on a two-dimensional plane, and the effect of static compensation on the optical path of the excitation light is realized.
The dynamic focusing subsystem consists of a focusing lens group 5 and a focusing lens driving stepping motor; the focusing lens group 5 is composed of a positive lens and a negative lens, the focusing lens drive stepping motor is connected with the negative lens, exciting light is focused in a medium material through the focusing lens group 5, the main controller sends an instruction to control the focusing lens drive stepping motor to enable the negative lens to move along the light path direction, the movement distance of the negative lens is controlled to change the focal position of exciting light beams passing through the whole lens group, and therefore the focal plane of the exciting light is controlled to move along the Z-axis direction, and three-dimensional scanning of the exciting light can be achieved.
The main controller is used for receiving the graphic slice data of the image processing and acquisition module and converting the graphic slice data into a command acceptable by the singlechip; the scanning vibration mirror group is used for sending a scanning deflection instruction to the excitation light scanning subsystem and controlling the deflection of the excitation light beam on a two-dimensional plane; and the system is used for receiving the measurement and feedback information of the distance measuring sensor, processing data and sending an instruction to control the movement of the stepping motor in the dynamic focusing subsystem.
FIG. 3 is a functional block diagram of an excitation light three-dimensional focusing scanning system according to the present invention.
As shown in fig. 4, the main controller 6 is configured to receive the image slice data of the image processing and acquiring module and convert the image slice data into a command acceptable to the single chip microcomputer; the scanning vibration mirror group is used for sending a scanning deflection instruction to the excitation light scanning subsystem and controlling the deflection of the excitation light beam on a two-dimensional plane; and the system is used for receiving the measurement and feedback information of the distance measuring sensor, processing data and sending an instruction to control the movement of the stepping motor in the dynamic focusing subsystem. The main controller 6 processes the image data sent from the storage module, plans the scanning path of the whole scanning device, and sends control instructions to the excitation light scanning subsystem 7 and the dynamic focusing subsystem 9. A laser light source 1 in an exciting light scanning subsystem is started to emit exciting light with tunable power, the exciting light passes through a beam expanding lens 2, a focusing lens group 5 of a dynamic focusing subsystem is reflected by an X-axis reflector and a Y-axis reflector of a scanning vibration lens 3, and an F-Theta field lens 4 is focused into an up-conversion luminescent medium. The main controller commands to control the on-off of the exciting light source, set the exciting light power and control the corresponding step motor of the X and Y reflecting mirrors in the scanning galvanometer 3. For the dynamic focusing subsystem 9, the excitation light can be focused into a spot-like spot in the medium material by the focusing lens group 5 (two lens groups including a negative lens and a positive lens) of the system. The main controller 6 sends out an instruction to control a stepping motor in transmission connection with a negative lens in the focusing lens group 5, so that the excitation light focal plane moves along the Z axis. This enables a three-dimensional scanning of the excitation light in the medium. In order to further increase the scanning accuracy, a distance measuring sensor 8 is added in the system, and the main controller 6 can correct the control command sent to the dynamic focusing subsystem 9 in real time according to the distance from the excitation light scanning subsystem to the excitation light focal plane in the upconversion luminescent medium, which is measured by the distance measuring sensor 8. An F-Theta field lens 4 exists between the excitation light scanning subsystem 7 and a scanning plane, and the F-Theta field lens 4 is used for static compensation of the laser in scanning (compensating the optical path difference of the laser in scanning so as to enable a laser scanning point to be positioned in one plane).
The process of point-like focusing of the excitation light can be described as that when the excitation light passes through the collimation beam expander 2, the laser beam is expanded and shaped to obtain a collimated excitation light beam, and the dynamic focusing subsystem 9 adjusts the focal length of the excitation light beam through the transmitted data, so that the excitation light beam is focused in a point-like manner in the medium.
The invention also provides an image scanning method of the excitation light three-dimensional focusing scanning system, which comprises the following specific steps:
the method comprises the following steps: inputting a target 3D model image into an image processing and acquiring module, carrying out slicing processing on the image model by slicing software in the image processing and acquiring module, storing generated 3D image slice data in a storage module, and transmitting the slice data to a main controller; the main controller receives and processes the image data output from the storage module and plans the scanning path of the whole scanning system; the main controller processes the image slice data sent by the storage module, plans an image scanning path and sends a control instruction to the excitation light scanning subsystem and the dynamic focusing subsystem;
specifically, the main controller controls the on-off of the exciting light source 1 in the exciting light scanning subsystem and the setting of the exciting light power thereof, and controls the corresponding step motor movement of the X-axis reflector and the Y-axis reflector in the scanning galvanometer 3 and the step motor movement driven by the dynamic focusing lens in the dynamic focusing subsystem, thereby realizing the dynamic display of the pixel points.
Step two: after the exciting light scanning subsystem receives a control signal of the main controller, the exciting light source is started to emit exciting light; when the exciting light passes through the collimation beam expander, the light beam is expanded and shaped to obtain a collimated light beam; then the exciting light beam passes through a focusing lens group 5 of the dynamic focusing subsystem, so that the exciting light beam is focused; the focused excitation light beam sequentially passes through X-axis and Y-axis reflectors of a scanning vibration mirror group 3 in the excitation light scanning subsystem, and the main controller reads image slice data and respectively sends control instructions to X-axis and Y-axis control stepping motors to realize two-dimensional plane scanning of the excitation light beam on a focal plane; a main controller sends a control instruction to a stepping motor in transmission connection with a dynamic focusing mirror lens in the focusing mirror group 5, and the distance between the front lens and the rear lens is changed, so that the focal plane of the exciting light beam is regulated and controlled to move along the Z axis, and the three-dimensional scanning of the exciting light beam is realized;
step three: the distance from an excitation light source lens of an excitation light scanning subsystem to an excitation light focal plane in the upconversion luminescent medium is measured by using a ranging sensor, and a feedback signal is sent to the main controller; the main controller processes the signals and then sends control instructions to the dynamic focusing subsystem for real-time correction; all subsystems of the whole exciting light three-dimensional focusing scanning system work cooperatively to perform reciprocating scanning to form a complete three-dimensional graph, so that dynamic true three-dimensional display in the up-conversion luminescent medium is realized.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (2)
1. An excitation light three-dimensional focusing scanning system is characterized by comprising a main controller, a storage module, an image processing and collecting module, an excitation light scanning subsystem, a distance measuring sensor and a dynamic focusing subsystem; the main controller is respectively connected with the storage module, the image processing and collecting module, the exciting light scanning subsystem, the distance measuring sensor and the dynamic focusing subsystem; the image processing and acquisition module is used for inputting a target 3D model image, slicing software in the image processing and acquisition module is used for carrying out slicing processing on the 3D model image, generated 3D image slice data is stored in the storage module, and meanwhile, the slice data is transmitted to the main controller; the main controller processes the 3D model image data sent by the storage module, plans an image scanning path and sends a control instruction to the excitation light scanning subsystem and the dynamic focusing subsystem; after the excitation light scanning subsystem receives the instruction of the main controller, the excitation light source is started to emit excitation light, so that two-dimensional plane scanning of the excitation light of the up-conversion luminescent medium is realized; after receiving the instruction of the main controller, the dynamic focusing subsystem controls a stepping motor connected with a focusing lens group in the dynamic focusing subsystem to be started, so that a movable lens in the focusing lens group moves along the light path direction, the focus position of exciting light is changed, the focus plane of the exciting light moves along the Z-axis direction, and the dynamic focusing subsystem is used for realizing exciting light three-dimensional scanning of an up-conversion luminescent medium; the distance measuring sensor is used for detecting the distance from a lens of an excitation light source in the excitation light scanning subsystem to an excitation light focal plane in the upconversion luminescent medium and sending a feedback signal to the main controller, and the main controller processes the signal and then corrects a control instruction sent by the dynamic focusing subsystem in real time;
the excitation light scanning subsystem consists of an excitation light source (1), a beam expander lens (2), a scanning vibration lens group (3) and an F-Theta field lens (4); after being expanded by the beam expander (2), excitation light emitted by the excitation light source (1) is focused by the dynamic focusing subsystem and reflected by the scanning vibration mirror group, and then is projected to the position of a laser focal plane in the upconversion luminescent medium through the F-Theta field lens (4);
the scanning vibration mirror group (3) consists of an X-axis reflector, a Y-axis reflector and two stepping motors, wherein the two stepping motors respectively control the rotation of the X-axis reflector and the Y-axis reflector; the instruction of the main controller is transmitted to the scanning vibration mirror group to control the scanning vibration mirror group to drive the stepping motors of the X-axis reflector and the Y-axis reflector to scan according to the slice data instruction, and then the two-dimensional plane scanning of the exciting light of the up-conversion luminescent medium can be realized;
the dynamic focusing subsystem consists of a focusing lens group (5) and a focusing lens transmission stepping motor; the focusing lens group (5) is composed of a positive lens and a negative lens, the focusing lens drive stepping motor is connected with the negative lens, exciting light is focused in a medium material through the focusing lens group (5), the main controller sends an instruction to control the focusing lens drive stepping motor to enable the negative lens to move along the light path direction, the movement distance of the negative lens is controlled to change the focal position of exciting light beams passing through the whole lens group, and therefore the focal plane of the exciting light is controlled to move along the Z-axis direction, and three-dimensional scanning of the exciting light can be achieved.
2. The scanning method of the excitation light three-dimensional focusing scanning system as claimed in claim 1, characterized by comprising the following steps:
the method comprises the following steps: inputting a target 3D model image into an image processing and acquiring module, carrying out slicing processing on the image model by slicing software in the image processing and acquiring module, storing generated 3D image slice data in a storage module, and transmitting the slice data to a main controller; the main controller receives and processes the image data output from the storage module and plans the scanning path of the whole scanning system; the main controller processes the image slice data sent by the storage module, plans an image scanning path and sends a control instruction to the excitation light scanning subsystem and the dynamic focusing subsystem;
step two: after the exciting light scanning subsystem receives a control signal of the main controller, the exciting light source is started to emit exciting light; when the exciting light passes through the collimation beam expander, the light beam is expanded and shaped to obtain a collimated light beam; then the exciting light beam passes through a focusing lens group of the dynamic focusing subsystem, so that the exciting light beam is focused; the focused excitation light beam sequentially passes through X-axis and Y-axis reflectors of a scanning vibration mirror group in the excitation light scanning subsystem, the main controller reads image slice data and respectively sends control instructions to X-axis and Y-axis control stepping motors to realize two-dimensional plane scanning of the excitation light beam on a focal plane; a main controller sends a control instruction to a stepping motor in transmission connection with a dynamic focusing mirror lens in a focusing mirror group, and the distance between the front lens and the rear lens is changed, so that the focal plane of the exciting light beam is regulated and controlled to move along the Z axis, and the three-dimensional scanning of the exciting light beam is realized;
step three: the distance from an excitation light source lens of an excitation light scanning subsystem to an excitation light focal plane in the upconversion luminescent medium is measured by using a ranging sensor, and a feedback signal is sent to the main controller; the main controller processes the signals and then sends control instructions to the dynamic focusing subsystem for real-time correction; all subsystems of the whole exciting light three-dimensional focusing scanning system work cooperatively to perform reciprocating scanning to form a complete three-dimensional graph, so that dynamic true three-dimensional display in the up-conversion luminescent medium is realized.
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