CN217162084U

CN217162084U - Intraoral image scanner and laser scanning device thereof

Info

Publication number: CN217162084U
Application number: CN202120767396.8U
Authority: CN
Inventors: 胡安元; 吴征巍; 卜荣君
Original assignee: Tianyi Ruishi Suzhou Oral Health Care Technology Co ltd
Current assignee: Tianyi Ruishi Suzhou Oral Health Care Technology Co ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2022-08-12
Anticipated expiration: 2031-04-15

Abstract

The utility model provides an image scanner in mouth and laser scanning device thereof. The intraoral image scanner is provided with an image plate path for passing an image plate, and comprises a laser light source for emitting laser beams, an optical component for processing the laser beams and a vibrating mirror capable of enabling laser spots formed on the image plate path to move back and forth, wherein the laser scanning device further comprises a first reflecting mirror and a second reflecting mirror, and the laser light source, the optical component, the vibrating mirror, the first reflecting mirror and the second reflecting mirror are sequentially arranged along an optical axis. The utility model discloses a laser beam can reflect to image board route through this first speculum and this second speculum after the mirror that shakes reflects out, and compact structure can effectively reduce the shared space of this laser scanning device.

Description

Intraoral image scanner and laser scanning device thereof

Technical Field

The utility model belongs to intraoral image scanning field relates to an intraoral image scanner and laser scanning device thereof.

Background

The laser scanning imaging technology utilizes laser to scan an image plate recorded with a tooth profile latent image and outputs digital image information, and a core optical component used for laser scanning relates to an optical scanning system. The galvanometer, one of the core components of the optical scanning system, is a servo motor provided with a plane reflecting mirror, and the motor only swings back and forth within a certain angle range, so that the reflecting mirror is driven to vibrate. The scanning track of the galvanometer is a sector circular plane, and the lens swings back and forth, so the working frequency is not high generally. The lens has certain moment of inertia when moving, and the movement linearity is difficult to be very high, so that the lens can only be applied to occasions with low precision requirement. In a traditional light path, laser is reflected from a reflecting mirror of a galvanometer and then directly scans an image plate, and in order to obtain better linearity and optical depth of field, the scanning radius is generally larger, which results in larger equipment volume. In addition, the laser emitter and the lens assembly are generally assembled in one part, so that the laser beam cannot be adjusted, the requirements on processing and assembly are high, and the use is not flexible enough.

Disclosure of Invention

To at least one among the above-mentioned problem, the utility model provides an image scanner's laser scanning device in mouth, its compact structure, occupation space are less.

The utility model also provides an image scanner in mouth, its compact structure, occupation space are less.

In order to achieve the above purpose, the utility model adopts the technical scheme that:

the utility model provides an intraoral image scanner's laser scanning device, intraoral image scanner has the image board route that is used for supplying the image board to pass through, including the laser light source that is used for emergent laser beam, be used for right the optical component that laser beam goes on handling and can make form in laser facula reciprocating motion's on the image board route mirror that shakes, mirror scanning system that shakes still includes first speculum and second mirror, laser light source optical component shake the mirror first speculum with the second mirror sets gradually along the optical axis.

Preferably, the mirror surfaces of the first mirror and the second mirror are parallel to each other.

Preferably, the laser scanning device further comprises a support, the laser light source and the optical assembly are arranged on one side of the support, the galvanometer is arranged on the other side of the support, and the support is provided with a through hole for allowing the laser beam to pass through and project onto the galvanometer.

Preferably, the first reflector and the second reflector are respectively arranged on the bracket and are positioned on the same side as the galvanometer.

Preferably, the optical assembly includes a lens barrel movably connected to the holder along an optical axis; the laser light source is arranged on a light source seat, and the light source seat can be movably connected with the lens cone along an optical axis.

Preferably, the lens barrel is in threaded connection with the bracket, and the light source base is in threaded connection with the lens barrel.

Preferably, the optical assembly further includes a quasi-axis lens for processing the laser beam into a parallel beam and a focusing lens for focusing the parallel beam, and the quasi-axis lens and the focusing lens are disposed in the lens barrel.

In an embodiment, the laser scanning device further comprises a motor for driving the galvanometer to oscillate back and forth.

The utility model discloses still adopt following technical scheme:

an intraoral image scanner comprises the laser scanning device.

Preferably, the intraoral image scanner further includes a fluorescence collection component for collecting fluorescence excited by the image plate and a photoelectric conversion component for performing photoelectric conversion, and the fluorescence collection component, the photoelectric conversion component and the laser scanning device are located on the same side of the path of the image plate.

Preferably, the photoelectric conversion assembly comprises a photomultiplier tube, the fluorescence collection assembly comprises a light collector and a light filter, and the light collector and the light filter are arranged at one end of the photomultiplier tube.

The utility model adopts the above technical scheme, compare prior art and have following advantage:

the utility model discloses an image scanner in mouth and laser scanning device thereof through first speculum and second mirror with the light path turn, can reflect to the image board route through this first speculum and this second mirror with shorter route after laser beam reflects from the mirror that shakes, compact structure can effectively reduce the shared space of laser scanning device.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic structural view of a laser scanning device of an intraoral image scanner according to an embodiment of the present invention;

fig. 2 is an exploded view of a laser scanning device of an intraoral image scanner according to an embodiment of the present invention;

fig. 3 is a side view of a laser scanning device of an intraoral image scanner according to an embodiment of the present invention;

fig. 4 is a sectional view taken in the direction of a-a in fig. 3.

Wherein the content of the first and second substances,

1. a laser light source; 101. a light source holder; 2. an optical component; 21. a quasi-axial lens; 22. a focusing lens; 23. a lens barrel; 3. a support; 4. a galvanometer component; 41. a galvanometer motor; 42. a galvanometer lens; 5. a first reflector; 6. a second reflector; 7. a fluorescence collection assembly; 71. a light collector; 711. a housing; 712. a laser entrance port; 72. an optical filter; 8. a photoelectric conversion element; 81. a photomultiplier tube; 9. an image board path; 10. an image plate; 11. an external thread; 12. an internal thread.

Detailed Description

The following detailed description of the preferred embodiments is provided in conjunction with the accompanying drawings to enable those skilled in the art to more readily understand the advantages and features of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Referring to fig. 1, a laser scanning device of an intraoral image scanner according to the present embodiment includes a laser light source 1, an optical assembly 2, a galvanometer assembly 4, a first reflecting mirror 5, and a second reflecting mirror 6. The laser light source 1 is specifically a laser, which is mounted on the light source base 101 for emitting a laser beam. The optical assembly 2 includes a quasi-axis lens 21, a focusing lens 22 and a lens barrel 23, the quasi-axis lens 21 is used for changing the divergent laser beam emitted by the laser light source 1 into a parallel beam, the focusing lens 22 is used for focusing the parallel beam, and the quasi-axis lens 21 and the focusing lens 22 are installed in the lens barrel 23. The laser scanning device further comprises a bracket 3, a lens barrel 23 is movably connected to the bracket 3 along the optical axis, and a light source base 101 is movably connected to the lens barrel 23 along the optical axis. In the embodiment, the lens barrel 23 and the holder 3 are connected by the external thread 11, and the light source base 101 and the lens barrel 23 are connected by the internal thread 12. It can be understood that the relative position of the laser light source 1 and the lens barrel 23 is adjustable, thereby adjusting the collimation of the parallel light beams; the relative position of the lens barrel 23 and the holder 3 is adjustable, whereby the focal length of the focused light beam can be adjusted.

The galvanometer unit 4 includes a galvanometer motor 41 and a galvanometer lens 42 driven by the galvanometer motor 41 and deflected within a certain angle, and is capable of reciprocating a laser spot formed on the image plate path 9. The galvanometer component 4 is arranged on the bracket 3, and is respectively positioned at two opposite sides of the bracket 3 together with the laser light source 1 and the optical component 2. The laser light source 1 and the optical component 2 are coaxially arranged along a laser propagation path, the laser light source 1 and the optical component 2 are located on one side of the support 3, and the support 3 is provided with a through hole for allowing a laser beam to pass through and project onto the galvanometer lens 42.

The mirror surfaces of the first mirror 5 and the second mirror 6 are arranged opposite to each other in parallel. The light beam is projected from the oscillating mirror 42 to the first reflecting mirror 5, and then projected from the first reflecting mirror 5 to the second reflecting mirror 6. The laser is projected via a second mirror 6 onto the image plate path 9.

The present embodiment further includes an intraoral image scanner, which includes the above-mentioned laser scanning device, and the intraoral image scanner further includes a fluorescence collecting component 7, a photoelectric conversion component 8 and an image plate 10, wherein the fluorescence collecting component 7, the photoelectric conversion component 8 and the laser scanning device are located on the same side of the image plate path 9. The photoelectric conversion module 8 includes a photomultiplier 81, the fluorescence collection module 7 includes a light collector 71 and a filter 72, and the light collector 71 and the filter 72 are provided at one end of the photomultiplier 81. The light collector 71 includes a hollow housing 711, and the housing 711 is further provided with a laser light inlet 712 for inputting the laser light beam, wherein the laser light inlet 712 is in the shape of a slit, and the shape of the slit matches with the scanning path of the laser light beam on the image plate 10. In the scanning operation, the light collector 71 is disposed above the image plate 10, and the laser beam reflected by the galvanometer 4 is incident from the laser incident port 712 into the housing 711 and projected onto the image plate 10. The housing 711 of the optical collector 71 is formed by two integrally parabolic half-shells which are fixedly connected by means of fasteners such as screws. The inner wall of the housing 711 is arc-shaped and coated with a reflective film to effectively collect fluorescence.

When the laser irradiates the image plate 10, the laser can excite and generate fluorescence, the intensity of the fluorescence is in a proportional relation with the latent image information recorded on the image plate 10, and the fluorescence excited by the image plate 10 is scattered outwards according to a certain angle distribution rule.

It will be appreciated that the intraoral image scanner operates as follows:

the laser beam emitted from the laser source 1 on the light source base 101 is collimated by the collimation axis lens 21 on the lens barrel 23 to become a parallel beam, then is focused by the focusing lens 22, passes through the bracket 3, is projected onto the first reflector 5 through the vibrating mirror lens 42, is projected onto the second reflector 6 through the first reflector 5, and finally is projected onto the image plate 10 through the laser incident port 712 on the light collector 71. The fluorescence excited on the image plate 10 is collected by the light collector 71, filtered by the filter 72, and projected to the light sensing window of the photomultiplier 81 to complete signal collection.

The intraoral image scanner and the laser scanning device thereof provided by the embodiment are provided with the first reflecting mirror 5 and the second reflecting mirror 6, and the laser beam can be reflected to the image plate 10 through the first reflecting mirror 5 and the second reflecting mirror 6 after being reflected out of the vibrating mirror 4, so that the structure is compact, and the space occupied by the laser scanning device can be effectively reduced. Meanwhile, the relative position between the light source seat 101 provided with the laser light source 1 and the lens cone 23 provided with the optical component 2 can be adjusted, the relative position between the lens cone 23 and the support 3 can also be adjusted, and the distance of each component can be reasonably adjusted according to different requirements, so that the requirements on processing and assembly are reduced, and the use is flexible and convenient.

The above embodiments are merely illustrative of the technical concepts and features of the present invention, and are a preferred embodiment, which is intended to enable persons skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention cannot be limited thereby.

Claims

1. A laser scanning device of an intraoral image scanner, the intraoral image scanner has an image plate path for an image plate to pass through, comprises a laser light source for emitting laser beams, an optical component for processing the laser beams, and a galvanometer capable of enabling laser spots formed on the image plate path to move back and forth, and is characterized in that: the laser scanning device further comprises a first reflector and a second reflector, and the laser source, the optical assembly, the vibrating mirror, the first reflector and the second reflector are sequentially arranged along an optical axis.

2. The laser scanning device according to claim 1, characterized in that: the mirror surfaces of the first mirror and the second mirror are parallel to each other.

3. The laser scanning device according to claim 1, characterized in that: the laser scanning device further comprises a support, the laser light source and the optical assembly are arranged on one side of the support, the vibrating mirror is arranged on the other side of the support, and a through hole for allowing a laser beam to pass through and project onto the vibrating mirror is formed in the support.

4. A laser scanning device according to claim 3, wherein: the first reflector and the second reflector are respectively arranged on the bracket and are positioned at the same side with the vibrating mirror.

5. A laser scanning device according to claim 3, wherein: the optical assembly comprises a lens barrel which is movably connected to the bracket along an optical axis; the laser light source is arranged on a light source seat, and the light source seat can be movably connected with the lens cone along an optical axis.

6. The laser scanning device according to claim 5, characterized in that: the lens cone is in threaded connection with the support, and the light source seat is in threaded connection with the lens cone.

7. The laser scanning device according to claim 5, characterized in that: the optical assembly further comprises a quasi-axis lens and a focusing lens, the quasi-axis lens is used for processing the laser beams into parallel beams, the focusing lens is used for focusing the parallel beams, and the quasi-axis lens and the focusing lens are arranged in the lens barrel.

8. The laser scanning device according to claim 1, characterized in that: the laser scanning device also comprises a motor for driving the galvanometer to swing in a reciprocating manner.

9. An intraoral image scanner, its characterized in that: comprising a laser scanning device according to any of claims 1 to 8.

10. An intraoral image scanner according to claim 9, wherein: the intraoral image scanner further comprises a fluorescence collection assembly for collecting fluorescence excited by the image plate and a photoelectric conversion assembly for performing photoelectric conversion, wherein the fluorescence collection assembly, the photoelectric conversion assembly and the laser scanning device are positioned on the same side of the path of the image plate.