CN105467607A - A scanning device - Google Patents
A scanning device Download PDFInfo
- Publication number
- CN105467607A CN105467607A CN201510896212.7A CN201510896212A CN105467607A CN 105467607 A CN105467607 A CN 105467607A CN 201510896212 A CN201510896212 A CN 201510896212A CN 105467607 A CN105467607 A CN 105467607A
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- Prior art keywords
- light
- beam splitter
- scanister
- quarter
- wave plate
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- 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
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
- A61C9/00—Impression cups, i.e. impression trays; Impression methods
- A61C9/004—Means or methods for taking digitized impressions
- A61C9/0046—Data acquisition means or methods
- A61C9/0053—Optical means or methods, e.g. scanning the teeth by a laser or light beam
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Optics & Photonics (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Dentistry (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- General Physics & Mathematics (AREA)
Abstract
The invention provides a scanning device having a relatively small size, and includes a light source, a projection module group, an image capture module group and an object-contacting module group. The projection module group includes a liquid crystal display element and a first light splitting element. The liquid crystal display element is used for receiving incident light emitted by the light source module group and emitting projection light according to the incident light. The first light splitting element is used for making the projection light penetrate to form first light. The object-contacting module group includes a reflection element, a quarter-wave plate and a second light splitting element. The reflection element is used for reflecting the first light to enable the first light to be second light. The second light penetrates through the quarter-wave plate to form third light. The third light is incident to an object. The third light is reflected by the object to become fourth light. The fourth light penetrates through the quarter-wave plate to form fifth light with a second polarization direction. The second light splitting element is used for enabling the first light and the second light to penetrate and reflecting the fifth light to form sixth light. The first light splitting element is used for reflecting the sixth light to form seventh light. The object-contacting module group is used for receiving seventh light reflected by the first light splitting element.
Description
Technical field
The present invention has about a kind of scanister, particularly relates to a kind of scanister that can reduce volume.
Background technology
Developed hand held oral numerical digit scanning machine in recent years, replaced traditional impression with numerical digit impression method, and also made the designing and making of artificial tooth be able to digitisation.Not only can raise the efficiency thus, also reduce the distortion inaccuracy caused because of complicated skilled worker's step or traditional impression material.
But, although the oral cavity scanning machine of each label was constantly being weeded out the old and bring forth the new in recent years, there is part gradually to replace the trend of traditional impression method, but be technically still designed to main flow with non-coaxial light path design (projection and capture different light rays path) with unpolarized.General light path framework comprises following components, light source, Image Sensor, lens element, catoptron etc., then takes to utilize with triangulation or structure Light Source Method and calculate three dimensional informations from the reflected light of tooth.
The oral cavity numerical digit scanning machine of general market utilizes according to structure Light Source Method and calculates three dimensional informations from the reflected light of tooth at present.Because structure Light Source Method needs to project out specific image, general use digital micromirror elements (DigitalMicromirrorDevice, DMD) such element produces image, but non-coaxial framework light path design again matching structure Light Source Method easily cause bulky problem.
Summary of the invention
The object of the present invention is to provide a kind of scanister, to solve the problem.
In order to achieve the above object, the invention provides a kind of scanister, in order to scanning object, this scanister comprises light source module, projection module, taken module and connects thing module.This light source module is used for sending incident light, this projection module comprises: liquid crystal display cells and the first beam splitter, this is used for liquid crystal display element in receiving this incident light and sending projected light with projective patterns according to this incident light, this projected light has the first polarization direction, and this first beam splitter has the first light of this first polarization direction in order to make this projected light penetrate to become, this connects thing module in order to transmit this first light, this connects thing module and comprises reflecting element, quarter-wave plate and the second beam splitter, this reflecting element is the second light in order to reflect this first light, this quarter-wave plate is arranged between this reflecting element and this object, wherein this second light penetrates this quarter-wave plate becomes the 3rd light, 3rd light is incident to this object, 3rd light becomes the 4th light through this reflections off objects, 4th light penetrates this quarter-wave plate becomes the 5th light with the second polarization direction, this second polarization direction is vertical with this first polarization direction, this second beam splitter is arranged between this reflecting element and this quarter-wave plate, this second beam splitter penetrates in order to make this first light and this second light, and reflect the 5th light and become the 6th light, and this first beam splitter separately becomes the 7th light in order to reflect the 6th light, this taken module is in order to be received from the 7th light of this first beam splitter reflection.
Preferably, also comprise: projection and capture lens set, be arranged between this first beam splitter and this second beam splitter, this first light is reflected as this second light through this reflecting element after penetrating this projection and capture lens set, this second beam splitter successively, 6th light is this first beam splitter incident after penetrating this projection and capture lens set, is reflected as the 7th light through this first beam splitter.
Preferably, this first beam splitter is point light polarization plate or a polarization splitting prism.
Preferably, this second beam splitter is a point light polarization plate, and this reflecting element is catoptron.
Preferably, this light source module comprises light source component, the combination of this light source component to be laser diode or this light source component be light-emitting diode and polaroid.
Preferably, this light source module also comprises: collimation lens and array lens, and the light for sending this light source component carries out homogenising to form this incident light.
Preferably, this first beam splitter, this second beam splitter relative level direction tilt 45 degree.
Preferably, this connects thing module and separately comprises: the first prism and the second prism; This first prism comprises: first surface and second, and this first surface is overlapping with this quarter-wave plate, and this second coating point light-polarizing layers is to form this second beam splitter; This second prism connects this first prism, and this second prism comprises: the 3rd and fourth face, and the 3rd coating is totally reflected film plating layer to form this reflecting element, overlapping this second of this fourth face.
Preferably, this first prism separately comprises relaying face, and this relaying face connects this first surface and this second, and this first light penetrates relaying face and re-shoots the 3rd, and this this first surface of the second smooth vertical incidence.
Preferably, this quarter-wave plate and this reflecting element press from both sides miter angle.
Compared with prior art, scanister provided by the invention, liquid crystal display cells is utilized to replace DMD to produce projective patterns, the incident light sent due to light source module directly can penetrate liquid crystal display cells, thus do not need light is significantly bent, and use the first beam splitter, the polarization characteristic of the second beam splitter reaches that projection is coaxial with capture, therefore it is volume required effectively to reduce optical element, and then the volume of reduction scanister.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the scanister of one embodiment of the invention;
Fig. 2 is the schematic diagram of the scanister of another embodiment of the present invention;
Fig. 3 is the situation schematic diagram utilizing the scanister of Fig. 1 to scan an object;
Fig. 4 is the schematic diagram of the scanister of another embodiment of the present invention.
Embodiment
For making there is further understanding to object of the present invention, structure, feature and function thereof, embodiment is hereby coordinated to be described in detail as follows.
Fig. 1 is the schematic diagram of the scanister 100 of one embodiment of the invention.Scanister 100 comprises projection module 110, taken module 120 and connects thing module 130 and light source module 140.Light source module 140 is for sending incident light E1, concrete, light source module 140 comprises light source component, light source component can be laser diode, or be the combination of light emitting diode (Light-EmittingDiode, LED) and polaroid, preferably, light source module 140 can also comprise: collimation lens and array lens, and collimation lens and array lens are used for carrying out homogenising to form incident light E1 to the light that light source component sends.Projection module 110 comprises liquid crystal display cells 114 and the first beam splitter 116.Liquid crystal display cells 114 can receive incident light E1 and send projected light E2 with projective patterns to object O according to incident light E1.
Connect thing module 130 and comprise reflecting element 132, quarter-wave plate 134 and the second beam splitter 136.In one embodiment of this invention, projected light E2 has the first polarization direction, and the first beam splitter 116 and the second beam splitter 136 are a point light polarization plate, and the light beam with the first polarization direction all can be made to penetrate.First beam splitter 116 relative level direction inclination, 45 degree of settings, can make the projected light E2 with the first polarization direction penetrate to become the first smooth L1.In addition, the second beam splitter 136 is arranged between reflecting element 132 and quarter-wave plate 134, and therefore the first smooth L1 can penetrate the second beam splitter 136, and continues incidence reflection element 132.In one embodiment of this invention, reflecting element 132 is catoptron, and therefore reflecting element 132 can reflect the first smooth L1 becomes the second smooth L2.Because the second smooth L2 also has the first polarization direction, therefore the second smooth L2 can penetrate the second beam splitter 136, and can be incident to quarter-wave plate 134.
Quarter-wave plate 134 is placed between reflecting element 132 and object O.Quarter-wave plate 134 can make the second smooth L2 penetrate becomes the 3rd smooth L3.In one embodiment of this invention, first smooth L1 is incident to reflecting element 132 with the direction (that is horizontal direction) of parallel quarter-wave plate 134, therefore, when quarter-wave plate 134 and reflecting element 132 press from both sides miter angle (angle namely between quarter-wave plate 134 and reflecting element 132 is 45 degree), the 3rd smooth L3 namely can with the incident object O in direction (that is vertical direction) of vertical quarter-wave plate 134.
3rd smooth L3 becomes the 4th smooth L4 after object O reflects, and the 4th smooth L4 can penetrate quarter-wave plate 134 becomes the 5th smooth L5.Because quarter-wave plate 134 can penetrate the polarization direction deflection 45 degree of the light of quarter-wave plate 134, therefore the 5th smooth L5 has second polarization direction vertical with the first polarization direction.Because the 5th smooth L5 has the second polarization direction, therefore the second beam splitter 136 can reflect the 5th smooth L5 becomes the 6th smooth L6, and the first beam splitter 116 that the 6th smooth L6 is led, and the first beam splitter 116 can reflect the 6th smooth L6 becomes the 7th smooth L7, and the 7th smooth L7 is made to be incident to taken module 120.
Taken module 120 is received from the 7th smooth L7 that the first beam splitter 116 reflects.The pattern projected due to projected light E2 is after the reflection through object O, distortion (distortion) can be produced because of the feature on object O surface, therefore by the smooth L7 of judgement the 7th present the difference of pattern and original pattern, namely can the three-dimensional model of building body O.
The schematic diagram of a kind of scanister that Fig. 2 provides for another embodiment of the present invention.Scanister 100 ＇ as shown in Figure 2 and the difference of above-mentioned scanister 100 are, scanister 100 ＇ also comprises: projection and capture lens set 150 are (for two lens in Fig. 2, but be not limited thereto), projection and capture lens set 150 are arranged between the first beam splitter 116 and the second beam splitter 136, first smooth L1 penetrates projection and capture lens set 150 successively, the second smooth L2 is reflected as through reflecting element 132 after second beam splitter 136, 6th smooth L6 penetrates projection incident first beam splitter 116 rear with capture lens set 150, the 7th smooth L7 is reflected as through the first beam splitter 116.By design projection and capture lens set 150, the energy of the 6th smooth L6 can be ensured and then ensure the quality of the image that taken module 120 obtains.
Fig. 3 is to use the situation figure of scanister 100 scanning object O1.Below for Fig. 3, scanister how capture is described.In figure 3, scanister 100, when the position P1 to P2 of scanning object O1, can send the 3rd smooth L3
p1and L3
p2to position P1 and P2, and receive the reflected light of object O1 on P1 and P2 of position respectively, i.e. the 4th smooth L4
p1and L4
p2.4th smooth L4
p1and L4
p2the 5th smooth L5 is become after quarter-wave plate 134
p1and L5
p2.And the 5th smooth L5
p1and L5
p2the 6th smooth L6 is then become after reflecting through the second beam splitter 136
p1and L6
p2, the 6th smooth L6
p1and L6
p2the 7th smooth L7 is become after the first beam splitter 116 reflects
p1and L7
p2, the 7th smooth L7
p1and L7
p2namely can incident taken module 120 be formed into picture point I
p1and I
p2.
In addition, although the reflecting element 132 in above-described embodiment is catoptron, and the second beam splitter 136 is a point light polarization plate, but in practical application, eachly connect in thing module if make, all there is equal angular between its catoptron and point light polarization plate, then may increase the complexity of processing procedure, and make yield lower, therefore in other embodiments of the invention, be also used as reflecting element and the second beam splitter by prism.Fig. 4 is the schematic diagram of the scanister 200 of another embodiment of the present invention.Scanister 200 comprise projection module 210, taken module 120, connect thing module 230, light source module 140 and projection and capture lens set 150.Projection module 210 comprises liquid crystal display cells 114 and the first beam splitter 216, in the present embodiment, first beam splitter 216 is polarization splitting prism (PolarizationBeamSplitter, PBS), in another embodiment of the present invention, the first beam splitter also can be point light polarization plate in above-described embodiment.Connect thing module 230 and comprise reflecting element 232, quarter-wave plate 134 and the second beam splitter 236.Scanister 200 is similar to the principle of operation of scanister 100, scanister 100 ＇, and difference is that connecing thing module 230 separately comprises the first prism 238A and the second prism 238B.First prism 238A comprises first surface M1 and second M2, and the second prism 238B comprises the 3rd M3 and fourth face M4.The first surface M1 of the first prism 238A is overlapping with quarter-wave plate 634, and second M2 of the first prism 238A can apply point light-polarizing layers to form the second beam splitter 236.Second prism 238B is connected to the first prism 228A, and the 3rd M3 of the second prism 238B can apply total reflection film plating layer to form reflecting element 232, and the fourth face M4 of the second prism 238B is then overlapped in second M2 of the first prism 238A.
In addition, first prism 238A separately comprises relaying face M5, relaying face M5 connects first surface M1 and second M2, and the first smooth L1 sequentially can penetrate relaying face M5, re-shoot second M2, fourth face M4 and the 3rd M3, and the first smooth L1 reflect through the 3rd M3 the second smooth L2 of producing can vertical incidence first surface M1.When the 6th smooth L6 sequentially penetrate the first prism 238A relaying face M5, projection and capture lens set 150 after incident first beam splitter 116, be reflected as the 7th smooth L7 through the first beam splitter 116.Connecing thing module 230 prism can be utilized to come implementation reflecting element and the second beam splitter due to scanister 200, therefore the angle between reflecting element and the second beam splitter can directly directly be determined by the angle of prism, and then can promote the yield manufacturing scanister 200.
Above-mentioned scanister is preferably mouth cavity scanner.
Scanister provided by the invention, liquid crystal display cells is utilized to replace DMD to produce projective patterns, the incident light sent due to light source module directly can penetrate liquid crystal display cells, thus do not need light is significantly bent, and use the first beam splitter, the second beam splitter polarization characteristic reach projection coaxial with capture, therefore it is volume required effectively to reduce optical element, and then reduce the volume of scanister.
The present invention is described by above-mentioned related embodiment, but above-described embodiment is only enforcement example of the present invention.Must it is noted that the embodiment disclosed limit the scope of the invention.On the contrary, change done without departing from the spirit and scope of the present invention and retouching, all belong to scope of patent protection of the present invention.
Claims (10)
1. a scanister, in order to scanning object, is characterized in that, this scanister comprises:
Light source module, for sending incident light;
Projection module, comprises:
Liquid crystal display cells, for receiving this incident light and sending projected light with projective patterns according to this incident light, this projected light has the first polarization direction; And
First beam splitter, penetrates to become first light with this first polarization direction in order to make this projected light;
Connect thing module, in order to transmit this first light, this connects thing module and comprises:
Reflecting element is the second light in order to reflect this first light;
Quarter-wave plate, be arranged between this reflecting element and this object, wherein this second light penetrates this quarter-wave plate becomes the 3rd light, 3rd light is incident to this object, 3rd light becomes the 4th light through this reflections off objects, 4th light penetrates this quarter-wave plate becomes the 5th light with the second polarization direction, and this second polarization direction is vertical with this first polarization direction; And
Second beam splitter, be arranged between this reflecting element and this quarter-wave plate, this second beam splitter penetrates in order to make this first light and this second light, and reflects the 5th light and become the 6th light, and this first beam splitter separately becomes the 7th light in order to reflect the 6th light; And
Taken module, in order to be received from the 7th light of this first beam splitter reflection.
2. scanister as claimed in claim 1, is characterized in that, also comprise:
Projection and capture lens set, be arranged between this first beam splitter and this second beam splitter, this first light is reflected as this second light through this reflecting element after penetrating this projection and capture lens set, this second beam splitter successively, 6th light is this first beam splitter incident after penetrating this projection and capture lens set, is reflected as the 7th light through this first beam splitter.
3. scanister as claimed in claim 1, is characterized in that, this first beam splitter is point light polarization plate or a polarization splitting prism.
4. scanister as claimed in claim 1, is characterized in that, this second beam splitter is a point light polarization plate, and this reflecting element is catoptron.
5. scanister as claimed in claim 1, it is characterized in that, this light source module comprises light source component, the combination of this light source component to be laser diode or this light source component be light-emitting diode and polaroid.
6. scanister as claimed in claim 5, it is characterized in that, this light source module also comprises: collimation lens and array lens, and the light for sending this light source component carries out homogenising to form this incident light.
7. scanister as claimed in claim 1, is characterized in that, this first beam splitter, this second beam splitter relative level direction tilt 45 degree.
8. scanister as claimed in claim 1, it is characterized in that, this connects thing module and separately comprises:
First prism, comprises:
First surface, overlapping with this quarter-wave plate; And
Second, coating point light-polarizing layers is to form this second beam splitter; And
Second prism, connects this first prism, comprises:
3rd, coating total reflection film plating layer is to form this reflecting element; And
Fourth face, overlapping this second.
9. scanister as claimed in claim 8, it is characterized in that, this first prism separately comprises relaying face, and this relaying face connects this first surface and this second, and this first light penetrates relaying face and re-shoots the 3rd, and this this first surface of the second smooth vertical incidence.
10. scanister as claimed in claim 1, it is characterized in that, the angle between this quarter-wave plate and this reflecting element is 45 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510896212.7A CN105467607A (en) | 2015-12-08 | 2015-12-08 | A scanning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510896212.7A CN105467607A (en) | 2015-12-08 | 2015-12-08 | A scanning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105467607A true CN105467607A (en) | 2016-04-06 |
Family
ID=55605474
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510896212.7A Pending CN105467607A (en) | 2015-12-08 | 2015-12-08 | A scanning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105467607A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106953999A (en) * | 2017-04-17 | 2017-07-14 | 苏州佳世达电通有限公司 | Scanning means |
| CN107049542A (en) * | 2016-12-29 | 2017-08-18 | 苏州佳世达电通有限公司 | Scanning means and the method for scanning object |
| CN108938129A (en) * | 2018-06-21 | 2018-12-07 | 苏州佳世达光电有限公司 | Oral cavity scanning machine |
| CN110376754A (en) * | 2019-07-26 | 2019-10-25 | 业成科技（成都）有限公司 | Optical system polarization structure |
| WO2020047692A1 (en) * | 2018-09-03 | 2020-03-12 | Carestream Dental Technology Shanghai Co., Ltd. | 3-d intraoral scanner using light field imaging |
| CN111227968A (en) * | 2018-11-29 | 2020-06-05 | 财团法人金属工业研究发展中心 | Dental body modeling device and dental body modeling method |
| CN117008351A (en) * | 2023-10-07 | 2023-11-07 | 北京朗视仪器股份有限公司 | Mouth scanning optical path system and scanner |
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| US20090103103A1 (en) * | 2007-10-18 | 2009-04-23 | Mht Optic Research Ag | Device for tomographic scanning objects |
| JP2013113581A (en) * | 2011-11-24 | 2013-06-10 | Suwa Optronics:Kk | Optical measurement head of three-dimensional shape data acquisition apparatus |
| WO2015036467A1 (en) * | 2013-09-11 | 2015-03-19 | Sirona Dental Systems Gmbh | Optical system for generating a pattern which changes over time for a confocal microscope |
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| CN1617008A (en) * | 2003-11-14 | 2005-05-18 | 致伸科技股份有限公司 | Scanning module and method |
| US20090103103A1 (en) * | 2007-10-18 | 2009-04-23 | Mht Optic Research Ag | Device for tomographic scanning objects |
| JP2013113581A (en) * | 2011-11-24 | 2013-06-10 | Suwa Optronics:Kk | Optical measurement head of three-dimensional shape data acquisition apparatus |
| WO2015036467A1 (en) * | 2013-09-11 | 2015-03-19 | Sirona Dental Systems Gmbh | Optical system for generating a pattern which changes over time for a confocal microscope |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107049542A (en) * | 2016-12-29 | 2017-08-18 | 苏州佳世达电通有限公司 | Scanning means and the method for scanning object |
| CN106953999A (en) * | 2017-04-17 | 2017-07-14 | 苏州佳世达电通有限公司 | Scanning means |
| CN108938129A (en) * | 2018-06-21 | 2018-12-07 | 苏州佳世达光电有限公司 | Oral cavity scanning machine |
| CN108938129B (en) * | 2018-06-21 | 2020-11-27 | 苏州佳世达光电有限公司 | Oral cavity scanner |
| WO2020047692A1 (en) * | 2018-09-03 | 2020-03-12 | Carestream Dental Technology Shanghai Co., Ltd. | 3-d intraoral scanner using light field imaging |
| CN111227968A (en) * | 2018-11-29 | 2020-06-05 | 财团法人金属工业研究发展中心 | Dental body modeling device and dental body modeling method |
| CN110376754A (en) * | 2019-07-26 | 2019-10-25 | 业成科技（成都）有限公司 | Optical system polarization structure |
| CN117008351A (en) * | 2023-10-07 | 2023-11-07 | 北京朗视仪器股份有限公司 | Mouth scanning optical path system and scanner |
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Application publication date: 20160406 |