CN110477874A - Image scanner in a kind of mouth - Google Patents
Image scanner in a kind of mouth Download PDFInfo
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- CN110477874A CN110477874A CN201910909956.6A CN201910909956A CN110477874A CN 110477874 A CN110477874 A CN 110477874A CN 201910909956 A CN201910909956 A CN 201910909956A CN 110477874 A CN110477874 A CN 110477874A
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- 230000003287 optical effect Effects 0.000 claims abstract description 45
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 230000005284 excitation Effects 0.000 claims abstract description 7
- 239000004065 semiconductor Substances 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000012528 membrane Substances 0.000 claims description 2
- 230000005622 photoelectricity Effects 0.000 claims description 2
- 238000003306 harvesting Methods 0.000 claims 1
- 210000000214 mouth Anatomy 0.000 description 38
- 238000000034 method Methods 0.000 description 8
- 230000000875 corresponding effect Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 239000004411 aluminium Substances 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002310 reflectometry Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000003384 imaging method Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 208000025157 Oral disease Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
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- 238000003745 diagnosis Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000686 essence Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 208000030194 mouth disease Diseases 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002601 radiography Methods 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- -1 silver halide Chemical class 0.000 description 1
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0071—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by measuring fluorescence emission
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/0059—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
- A61B5/0082—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes
- A61B5/0088—Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence adapted for particular medical purposes for oral or dental tissue
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/45—For evaluating or diagnosing the musculoskeletal system or teeth
- A61B5/4538—Evaluating a particular part of the muscoloskeletal system or a particular medical condition
- A61B5/4542—Evaluating the mouth, e.g. the jaw
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
- G02B26/10—Scanning systems
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/30—Collimators
Abstract
The invention discloses image scanner in a kind of mouth, uses flat field scanning mode and avoid the use of f- θ lens while there is higher spatial resolution.Image scanner in a kind of mouth, the mobile sweep mechanism of the optical facilities handled including laser light source, the laser beam for being emitted to the laser light source, the hot spot for forming laser beam, the phosphor collection mechanism of fluorescence for collecting Image Plate excitation and the photoelectric conversion mechanism for carrying out photoelectric conversion；The optical facilities include the collimation lens, aperture diaphragm and condenser lens set gradually, the collimation lens is made of an aspherical mirror, the focal length of the aspherical mirror is 15~25mm, and the diameter of the aperture diaphragm is 5~10mm, and the focal length of the condenser lens is 100~180mm.
Description
Technical field
The invention belongs to laser scanning imaging field, it is related to image scanner in a kind of mouth.
Background technique
Laser scanning imaging is specifically referred to through X-ray recording image, and is recorded in a kind of flexible shadow using laser reading
As the image of plate.Computer X-ray photography (Computed X-ray Radiography, CR) has been widely used for medical treatment
Health field is mainly characterized by relative to traditional X-ray technology using flexible, erasable Image Plate
(Imaging Plate, IP) replaces silver halide film, and available computer storage and display image information.X-ray penetrates object
It is irradiated on the Image Plate containing Optical-excitation fluorescent powder, a frame latent image (Latent Image) can be generated and is stored in Image Plate
In.When using the laser irradiation of certain wavelength (600-700nm), Image Plate can inspire specific wavelength (350-450nm)
Fluorescence, power distribution properties and latent image form are perfectly correlated, these fluorescence are collected, are converted into electric signal and digitize, from
And latent image is converted into the two-dimensional digital image that can store and transmit.
Image scanner is widely used in oral disease therapeutic and diagnosis in mouth based on X-ray technology (CR).
Such as in gear division industry, generally use the flank profil information on CR scanner reading Image Plate.Image-scanning system can in mouth at present
To be divided into flat field scanning system and curved surface scanning system, the difference between them is, which kind of posture Image Plate (IP) is in
It is irradiated with a laser excitation.
Curved surface scanning system refers to that IP plate is in bending state in scanning process, and bending degree depends on the configuration of system,
The purpose is to cooperate Optical rotary devices, the IP plate as caused by rotation is avoided to be not at optics optimal as plane.Such as Fig. 1 institute
Show, pentaprism rotation is driven by servo motor, the rotation of pentaprism drives the rotation of laser beam, to realize laser to IP
The scanning of plate 1 '.IP plate 1 ' is attached on a curved surface as can be seen from Figure 1, in order to keep the curvature of IP plate 1 ' and the curvature of curved surface
Unanimously, the face of IP plate 1 ' has to be pushed down with idler wheel 2 ' or other way.The mode of extruding inevitably results in IP plate
Service life is reduced, additionally, due to will cause erroneous judgement of the doctor to image caused by extruding the defects of scratch.
Flat field scanning system refers to that IP plate is formation state in scanning process, compared to curved surface scanning mode, if optics
System does not have special designing, then the spatial resolution of whole oral cavity scanner will be restricted.For this purpose, general flat field scanning
System all can solve the biggish defocusing amount of scanning angle bring equipped with f- θ lens.As shown in fig. 2, it can be seen that passing through f-
The flat field scanning that θ lens 3 ' are realized will lead to some insoluble problems, and system first becomes complicated and expensive；Secondly,
The installation requirement of f- θ lens 3 ' be it is very high, some small system machining deviations or assembling deviation can all lead to complete machine
Degradation；Furthermore due to the use of f- θ lens 3 ', the phosphor collection efficiency of scanning system can be lower in entire mouth, influence whole
The signal-to-noise ratio of machine.
Summary of the invention
In view of the above-mentioned problems, the present invention provides image scanner in a kind of mouth, use flat field scanning mode and have compared with
The use of f- θ lens is avoided while high spatial resolution.
In order to achieve the above objectives, the technical solution adopted by the present invention are as follows:
Image scanner in a kind of mouth, the laser beam including laser light source, for being emitted to the laser light source carry out
The mobile sweep mechanism of the optical facilities of processing, the hot spot for forming laser beam, for collecting the glimmering of Image Plate excitation
The phosphor collection mechanism of light and photoelectric conversion mechanism for carrying out photoelectric conversion；The optical facilities include the standard set gradually
Straight lens, aperture diaphragm and condenser lens, the collimation lens are made of an aspherical mirror, and the focal length of the aspherical mirror is
15~25mm, the diameter of the aperture diaphragm are 5~10mm, and the focal length of the condenser lens is 100~180mm.
Preferably, media coating is coated on the aspherical mirror.
Preferably, the laser light source is single mode semiconductor laser.
It is highly preferred that the wavelength of the laser beam of the single mode semiconductor laser outgoing is 635nm.
Preferably, the sweep mechanism is galvanometer system, and the galvanometer system includes galvanometer motor and by galvanometer electricity
Machine drives the galvanometer deflected within a certain angle.
Preferably, the phosphor collection mechanism includes optical collector, and the optical collector includes hollow shell, the shell tool
There is the fluorescence exit portal of the scanning mouth and the corresponding photoelectric conversion mechanism for face Image Plate.
It is highly preferred that the shell also has the laser light incident for being projected to the scanning mouth for the laser beam
Mouthful.
It is highly preferred that the shell has the inner wall of arc, ultraviolet enhancement filter membrane is coated on the inner wall.
It is highly preferred that the local selective of the inner wall of the shell be coated with low-reflection film.
It is highly preferred that the optical collector further includes the baffle for being fixedly connected on the shell, the baffle is by the scanning
The partial occlusion of mouth.
The present invention by adopting the above technical scheme, has the advantages that compared with prior art
Using flat field scanning technique, the extruding to Image Plate is avoided, improves the service life of Image Plate；Simplify simultaneously
The design of scanner in entire mouth.Using the optical facilities of low enlargement ratio, long working distance, big depth of focus, largely subtract
Lacked the biggish defocusing amount of scanning angle bring, thus realize optical system in the high spatial resolution of entire scanning field of view,
Entire optical system avoids the use of f- θ lens, and entire optical system becomes simple and at low cost；Due to optical system
The design of low enlargement ratio, long working distance, big depth of focus, image scanner has biggish tolerance amount in entire mouth, because of subsystem
Spatial resolution components machining deviation and assembling deviation it is insensitive, therefore parts design tolerance can relax, assembly
Process does not need the auxiliary installation detection of advanced optical equipment, greatly reduces processing and assembly cost.
Detailed description of the invention
It, below will be to attached drawing needed in embodiment description in order to illustrate more clearly of technical solution of the present invention
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, general for this field
For logical technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of image scanner in a kind of mouth in the prior art；
Fig. 2 is the structural scheme of mechanism of image scanner in another mouth in the prior art；
Fig. 3 is the stereoscopic schematic diagram according to image scanner in a kind of mouth of the embodiment of the present invention；
Fig. 4 is the side view of image scanner in mouth shown in Fig. 3；
Fig. 5 is the structural schematic diagram of one of embodiment of the present invention phosphor collection mechanism.
In above-mentioned attached drawing,
1, laser light source；10, laser beam；2, optical facilities；21, collimation lens；22, diaphragm；23, condenser lens；3,
Sweep mechanism；31, galvanometer；32, galvanometer motor；4, phosphor collection mechanism；41, shell；411, scanning mouth；412, laser light incident
Mouthful；42, baffle；5, photoelectric conversion mechanism.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be understood by the person skilled in the art.It should be noted that the explanation for these embodiments is used to help
Understand the present invention, but and does not constitute a limitation of the invention.In addition, involved in the various embodiments of the present invention described below
And to technical characteristic can be combined with each other as long as they do not conflict with each other.
The present embodiment provides image scanners in a kind of mouth.Referring to shown in Fig. 3 to Fig. 5, image scanner includes in the mouth
Optical facilities 2 that laser light source 1, the laser beam for being emitted to laser light source 1 are handled, for making 10 shape of laser beam
At the mobile sweep mechanism 3 of hot spot, fluorescence for collecting Image Plate excitation phosphor collection mechanism 4 and for carrying out photoelectricity
The photoelectric conversion mechanism 5 of conversion.Above-mentioned each mechanism is set gradually along the propagation path of laser beam.It is specific as follows: laser light source 1
Issue laser；The laser beam 10 that optical facilities 2 issue laser light source 1 is handled and (such as collimates, focuses)；Treated
Laser beam 10 reflexes on Image Plate through sweep mechanism 3, and at the same time, sweep mechanism 3 can be moved accordingly and changing makes laser
Light beam 10 is radiated on the different location of Image Plate, that is, changes the position that laser beam 10 is formed by scanning light spot on Image Plate
It sets；Phosphor collection mechanism 4 is arranged after Image Plate, and laser beam 10 can excite generation fluorescence after being irradiated on Image Plate,
It is collected by the scattering light that phosphor collection mechanism 4 generates Image Plate；Photoelectric conversion mechanism 5 setting phosphor collection mechanism it
Afterwards, the fluorescence of collection is subjected to photoelectric conversion, and exports corresponding electric signal.
In the present embodiment, laser light source 1 selects single mode semiconductor laser.The laser of single mode semiconductor laser outgoing
The wavelength of light beam 10 is 635nm, and light-emitting surface constant magnitude, about 1~4 μm ensure that whole with outstanding beam quality
Scanner is influenced in a mouth has good spatial resolution, and this can be significantly reduced the design difficulty of laser shaping optical path,
This will be described in detail below.
The optical facilities 2 include collimation lens 21, aperture diaphragm 22 and the condenser lens 23 set gradually, laser beam
10 first pass through and form collimated light beam after collimation lens 21, and collimated light beam penetrates aperture diaphragm 22, is gathered by condenser lens 23
It is burnt.In the present embodiment, collimation lens 21 is made of an aspherical mirror, and the focal length of aspherical mirror is 15~25mm.Due to this
Select single mode semiconductor laser as laser light source 1, the slow axis of the laser and the M of fast axle in embodiment2All close to 1,
Therefore a piece of aspherical mirror has been only used to collimate laser.The focal length of the aspherical mirror is 15-25mm, can be to NA
0.2 laser realizes that perfect collimation, aberration control within diffraction limit；The aspherical mirror surface is coated with about 99.5% thoroughly simultaneously
The media coating of rate is crossed, to guarantee that laser has enough power.
22 diameter of aperture diaphragm is 5~10mm, to increase the depth of focus of optical system.Specifically, aperture diaphragm 22
For the design of circular knife edge shape, and internal Darkening process, effectively the stray light of control system and can more accurately control
The NA of optical system.Image scanner is flat field scanning, therefore setting right and wrong of diaphragm (3) caliber size in mouth of the invention
Chang Guanjian's, since the light that flat field scanning will cause different angle has different light paths, i.e., in IP plate different spatial
Laser facula size can there is a big difference, 22 diameter of aperture diaphragm is set as 5~10mm in the present embodiment, then can be preferable
Ground avoids the above problem.
In the present embodiment, the focal length of the condenser lens 23 is 100~180mm.In order to cover the entire Image Plate of scanning
The scanning angle of laser is reduced simultaneously, and optical system is designed using long working distance, but if working distance is too long, is inevitably resulted in
Entire optical system optical magnification becomes larger, due to the constant magnitude of the light-emitting surface of single mode semiconductor laser, about 1-4um
Left and right, optical system magnification is excessive, then the spot size of its image planes can also become larger therewith.Therefore, the mouth of the present embodiment
Interior image-scanning system selects the focusing for the progress light beam of condenser lens 23 for realizing that focal length is set as 100-180mm, i.e., in optics
Balance is made between enlargement ratio and low scanning angle, and is cooperated and swashed in entire scanning angle with the realization of small-bore diaphragm 22
Light spot size all in diffraction limit within, that is, realize without f- θ lens flat field scanning while, realize mouth in image scan
The high spatial resolution of instrument, i.e., within the scope of entire scanning angle, laser facula all very littles, in optical system diffraction limit it
It is interior.
The sweep mechanism 3 selects galvanometer system.Galvanometer system includes galvanometer motor 32 and is existed by the driving of galvanometer motor 32
The galvanometer 31 of certain angle intrinsic deflection.As galvanometer motor 32 drives the fast vibration back and forth within a certain angle of galvanometer 31, by shaking
The reflection angle also corresponding change for the laser beam 10 that mirror 31 reflects, facula position on Image Plate also corresponding change, from
And realize scanning of the laser beam 10 to Image Plate.
The phosphor collection mechanism 4 includes optical collector.As shown in connection with fig. 5, optical collector includes hollow shell 41, shell 41
Fluorescence exit portal with scanning mouth 411 and corresponding photoelectric conversion mechanism 5 for face Image Plate.It is also opened up on the shell 41
There is the laser light incident mouth 412 for being projected to scanning mouth 411 for laser beam 10, which is in slit-shaped, shape
Shape matches with scan path of the laser beam 10 on Image Plate.In scanning, optical collector is placed in above Image Plate, and makes it
411 face Image Plate of scanning mouth, the 10 self-excitation optical entrance 412 of laser beam reflected by galvanometer 31 are injected in shell 41 and are swept certainly
Retouch mouth 411 and project Image Plate and be scanned, the fluorescent characters scanning mouth 411 of Image Plate excitation enters in shell 41, from it is final from
The outgoing of fluorescence exit portal.
Further, the shell 41 of laser generally parabolic shape, the inner wall of shell 41 are arc-shaped, and are coated on inner wall
Ultraviolet enhancement aluminium film possesses about 90% reflectivity in fluorescence bands (400nm or so), effectively to collect fluorescence.Specifically such as
Shown in Fig. 5, shell 41 is made of two entirety in the half-shell of parabolic, the two half-shells connect by the way that the fasteners such as screw are mutually fixed
It connects.The inner cavity of shell 41 is integrally in a circular table shape, and shell 41 is also whole in a circular table shape, and scanning mouth 411 is located at the internal diameter of shell 41
On biggish one end, fluorescence exit portal is located on lesser one end of internal diameter of shell 41, and laser light incident mouth 412 is opened in shell 41
Side wall on.In addition, the local selective of the inner wall of shell 41 be coated with low-reflection film, with solve the scanning of general flat field due to
The excitation angle difference of fluorescence will cause the non-uniform problem of image, can overcome and be asked by flat field scanning bring inhomogeneities type
Topic.Specifically, which is formed by the low reflecting material being plated in ultraviolet enhancement aluminium film, and the low reflecting material is specific
It is lower than the material of aluminium for reflectivity.
The optical collector further includes the baffle 42 for being fixedly connected on shell 41, and baffle 42 is by the partial occlusion of scanning mouth 411.
Specifically, the quantity of baffle 42 is two, and on the biggish one end of internal diameter for being set to shell 41 side by side, two baffles 42 it
Between there is interval, be to form the scanning mouth 411 in the interval of the two.By the way that baffle 42 is arranged, avoid inside shell 41
On the reflected light back to IP plate generated to laser reflection, to avoid exciting IP plate again caused image inhomogeneities
Generation.
Laser phosphor collection efficiency in the present embodiment is about 40%, and the fluorescence that can be realized different angle is uniformly received
Collection, can be realized very high image uniformity.
The photoelectric conversion mechanism 5 is photomultiplier tube.Specifically, which is fixed at optical collector
On, it is preferably fixed on lesser one end of internal diameter of the shell 41 of laser, and the fluorescence outgoing on face shell 41
Mouthful.In addition, the photoelectric conversion mechanism 5 can also be silicon photoelectric multiplier, silicon photoelectric multiplier includes two pole of avalanche optoelectronic
Pipe array, avalanche photodiode array are made of the avalanche photodide that multiple arrays are arranged.Avalanche photodide
Array includes at least a line avalanche photodide, forms multiple avalanche photodides of a line avalanche photodide
It is arranged along the direction parallel with scanning track of the laser beam 10 on Image Plate.
Image scanner has a characteristic that 1, laser beam by the vibration realizing laser of galvanometer to shadow in above-mentioned mouth
As the scanning of plate, galvanometer, which is applied to image scanner in mouth, can largely reduce the cost of system；In addition galvanometer system
Have many advantages, such as that debugging is simple compared with servo electrical machinery system, without dynamic balancing is done, greatly simplifies assembly technology.2, it uses
Flat field scanning technique avoids extruding of the system to Image Plate, improves the service life of Image Plate；Entire mouth is simplified simultaneously
The design of interior scanner.3, using the optical facilities 2 of low enlargement ratio, long working distance, big depth of focus, largely reduce and sweep
The biggish defocusing amount of angle bring is retouched, to realize optical system in the high spatial resolution of entire scanning field of view, entire light
System avoids the use of f- θ lens, and entire optical system becomes simple and at low cost；Due to the low amplification of optical system
The design of multiplying power, long working distance, big depth of focus, image scanner has biggish tolerance amount in entire mouth, because of the space of subsystem
The machining deviation and assembling deviation of resolution ratio components are insensitive, therefore parts design tolerance can relax, and assembling process is not
The auxiliary installation detection of advanced optical equipment is needed, processing and assembly cost are greatly reduced.4, optical collector is based on parabolic
Shape, inner wall are coated with ultraviolet enhancement aluminium film, possess about 90% reflectivity in fluorescence bands (400nm or so), can effectively receive
Collect fluorescence.Realize that image uniformity is asked by selectively plating the low material of reflectivity in optical collector inner wall section position
Topic.5, optical collector bottom be arranged baffle, avoid due to inside optical collector to laser reflection generate reflected light to Image Plate
It excites again, and then avoids result in the generation of image inhomogeneities.
The above embodiments merely illustrate the technical concept and features of the present invention, is a kind of preferred embodiment, and purpose exists
In those skilled in the art can understand the contents of the present invention and implements accordingly, guarantor of the invention can not be limited with this
Protect range.Equivalent change or modification made by all Spirit Essences according to the present invention, should all cover in protection scope of the present invention
Within.
Claims (10)
1. image scanner in a kind of mouth, at laser light source, the laser beam for being emitted to the laser light source
The mobile sweep mechanism of the optical facilities of reason, the hot spot for forming laser beam, the fluorescence for collecting Image Plate excitation
Phosphor collection mechanism and photoelectric conversion mechanism for carrying out photoelectric conversion；It is characterized by: the optical facilities include according to
Collimation lens, aperture diaphragm and the condenser lens of secondary setting, the collimation lens is made of an aspherical mirror, described aspherical
The focal length of mirror is 15~25mm, and the diameter of the aperture diaphragm is 5~10mm, the focal length of the condenser lens is 100~
180mm。
2. image scanner in mouth according to claim 1, it is characterised in that: be coated with deielectric-coating on the aspherical mirror
Layer.
3. image scanner in mouth according to claim 1, it is characterised in that: the laser light source swashs for single mode semiconductor
Light device.
4. image scanner in mouth according to claim 2, it is characterised in that: the single mode semiconductor laser outgoing
The wavelength of laser beam is 635nm.
5. image scanner in mouth according to claim 1, it is characterised in that: the sweep mechanism is galvanometer system, institute
Galvanometer system is stated to include galvanometer motor and drive the galvanometer deflected within a certain angle by the galvanometer motor.
6. image scanner in mouth according to claim 1, it is characterised in that: the phosphor collection mechanism includes light harvesting
Device, the optical collector include hollow shell, and the shell has scanning mouth and the corresponding photoelectricity for face Image Plate
The fluorescence exit portal of switching mechanism.
7. image scanner in mouth according to claim 6, it is characterised in that: the shell also has for swashing for described
Light light beam is projected to the laser light incident mouth of the scanning mouth.
8. image scanner in mouth according to claim 6, it is characterised in that: the shell has the inner wall of arc, institute
It states and is coated with ultraviolet enhancement filter membrane on inner wall.
9. image scanner in mouth according to claim 6, it is characterised in that: the local selective of the inner wall of the shell
Ground is coated with low-reflection film.
10. image scanner in mouth according to claim 6, it is characterised in that: the optical collector further includes being fixedly connected
In the baffle of the shell, the baffle is by the partial occlusion of the scanning mouth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910909956.6A CN110477874A (en) | 2019-09-25 | 2019-09-25 | Image scanner in a kind of mouth |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910909956.6A CN110477874A (en) | 2019-09-25 | 2019-09-25 | Image scanner in a kind of mouth |
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| CN110477874A true CN110477874A (en) | 2019-11-22 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910909956.6A Pending CN110477874A (en) | 2019-09-25 | 2019-09-25 | Image scanner in a kind of mouth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220004093A1 (en) * | 2020-07-02 | 2022-01-06 | Qisda Corporation | Projector with preferred lighting uniformity |
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| US11644739B2 (en) * | 2020-07-02 | 2023-05-09 | Qisda Corporation | Projector with preferred lighting uniformity |
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