TWI554078B - Scanning device - Google Patents

Description

Scanning device

The present invention relates to a scanning device, and more particularly to a scanning device that can adjust the angle of reception of reflected light from an object in different modes.

Scanning devices can be used to create three-dimensional models of objects and can be applied in many different categories. For example, an animator can use a scanning device to create a three-dimensional model of an object to reduce the time for manual drawing. For example, a dental modeler can use a scanning device to obtain a three-dimensional model of a patient's teeth to make a denture suitable for a patient. In the prior art, the scanning device can transmit a three-dimensional model of the object by emitting light having a fixed pattern to the object to be scanned and according to the pattern presented by the light reflected by the object. In detail, since the surface of the object may have a pattern or a concave-convex feature, the pattern reflected by the light reflected by the object to be scanned may be different from the original fixed pattern, and the scanning device may be obtained according to the difference between the two. The features of the object are scanned to create their three-dimensional model.

Since in the prior art, the angle at which the scanning device emits the pattern and the reflected light from the object is fixed, if the surface details of the object are large, the three-dimensional model distortion created by the scanning device may be distorted because the discrimination rate of the scanning device is insufficient. . FIG. 1 is a schematic diagram of a situation in which the tooth T is scanned by the scanning device 100. In Fig. 1, the tooth T has a cavity C between the A portion and the B portion. Since the opening of the cavity C is small, if the discrimination rate of the object to be measured by the scanning device 100 is insufficient, the cavity may be caused. C cannot be clearly discerned, and even causes distortion of the three-dimensional model established by the scanning device 100. Since the surface characteristics of the object are different, the prior art scanning device 100 can only scan the object at a fixed discrimination rate, which may cause inconvenience to the user when operating the scanning device 100.

One embodiment of the present invention provides a scanning device that can be used to construct a three-dimensional model of an object. The scanning device can include a projection module, an imaging module, and a docking module. The projection module can include an imaging element and a first beam splitting element. The imaging element can emit projected light to project a pattern, the projected light having a first polarization direction. The first beam splitting element can be used to penetrate the projected light to become the first light having the first polarization direction. The mating module can be used to transmit the first light and includes a reflective element, a quarter wave plate, and a second beam splitting element. The reflective element can be used to reflect the first light as the second light. The quarter wave plate can be placed between the reflective element and the object, wherein the second light penetrates the quarter wave plate into the third light and is incident on the object, and the third light is reflected by the object into the fourth light, the fourth light The quarter wave plate is penetrated into a fifth light having a second polarization direction. The second polarization direction is perpendicular to the first polarization direction. The second beam splitting element may be disposed between the reflective element and the quarter wave plate for penetrating the first light and the second light, and reflecting the fifth light to be the sixth light, and the first light splitting element may be additionally used The sixth light is reflected to become the seventh light. The image capturing module can be configured to receive the seventh light reflected from the first beam splitting element.

The second beam splitting element has a first angle with the quarter wave plate when the scanning device is operated in the first mode. When the scanning device operates in the second mode, the second beam splitting element and the quarter wave plate have a second angle, and the first angle is different from the second angle.

Another embodiment of the present invention provides a scanning device that can be used to construct a three-dimensional model of an object. The scanning device can include a projection module, an imaging module, and a docking module. The projection module can include an imaging element and a first beam splitting element. The imaging element can emit projected light to project a pattern, the projected light having a first polarization direction. The first beam splitting element can be used to penetrate the projected light to become the first light having the first polarization direction. The mating module can be used to transmit the first light and includes a reflective element, a quarter wave plate, and a second beam splitting element. The reflective element can be used to reflect the first light as the second light. The quarter wave plate can be placed between the reflective element and the object, wherein the second light penetrates the quarter wave plate into the third light and is incident on the object, and the third light is reflected by the object into the fourth light, the fourth light The quarter wave plate is penetrated into a fifth light having a second polarization direction. The second polarization direction is perpendicular to the first polarization direction. The second beam splitting element may be disposed between the reflective element and the quarter wave plate for penetrating the first light and the second light, and reflecting the fifth light to be the sixth light, and the first light splitting element may be additionally used The sixth light is reflected to become the seventh light. The image capturing module can be configured to receive the seventh light reflected from the first beam splitting element.

The first light and the sixth light have a third angle when the scanning device operates in the first mode. When the scanning device operates in the second mode, the first light and the sixth light have a fourth angle, and the third angle is different from the fourth angle.

FIG. 2 is a schematic diagram of a scanning device 200 according to an embodiment of the present invention. The scanning device 200 includes a projection module 210, an image capturing module 220, and a docking module 230. The projection module 210 includes a light source element 212, an imaging element 214, and a first beam splitting element 216. The light source element 212 can emit incident light E1, and the imaging element 214 can receive the incident light E1 and emit the projected light E2 according to the incident light E1 to project a pattern to the object O. In some embodiments of the present invention, the imaging element 214 can transmit a pattern through a Digital Micromirror Device (DMD), a dynamic grating generating device, or a fixed grating generating device, and the pattern is, for example, but not limited to, a checkered pattern.

The module 230 includes a reflective element 232, a quarter wave plate 234, and a second beam splitter 236. In one embodiment of the present invention, the projection light E2 has a first polarization direction, and the first beam splitting element 216 and the second beam splitting element 236 are splitting polarizers, and both of the light beams having the first polarization direction can be penetrated. The first beam splitting element 216 is disposed at an angle of 45 degrees with respect to the horizontal direction, so that the projection light E2 having the first polarization direction can be penetrated to become the first light L1. In addition, the second beam splitting element 236 is disposed between the reflective element 232 and the quarter wave plate 234, so that the first light L1 will penetrate the second beam splitting element 236 and continue to be incident on the reflective element 232. In an embodiment of the invention, the reflective element 232 is a mirror, and thus the reflective element 232 can reflect the first light L1 into the second light L2. Since the second light L2 also has the first polarization direction, the second light L2 can penetrate the second beam splitting element 236 and can enter the quarter wave plate 234.

A quarter wave plate 234 is placed between the reflective element 232 and the object O. The quarter wave plate 234 can penetrate the second light L2 into the third light L3. In one embodiment of the invention, the first light L1 is incident on the reflective element 232 in the direction of the parallel quarter wave plate 234 (i.e., horizontally), so that when the quarter wave plate 234 is sandwiched by the reflective element 232 At a 45 degree angle, the third light L3 will incident on the object O in the direction of the vertical quarter wave plate 234 (i.e., the vertical direction).

The third light L3 is reflected by the object O to become the fourth light L4, and the fourth light L4 can penetrate the quarter wave plate 234 to become the fifth light L5. Since the quarter wave plate 234 deflects the polarization direction of the light penetrating the quarter wave plate 234 by 45 degrees, the fifth light L5 has a second polarization direction perpendicular to the first polarization direction. Since the fifth light L5 has the second polarization direction, the second light splitting element 236 reflects the fifth light L5 to become the sixth light L6, and guides the sixth light L6 to the first light splitting element 216, and the first light splitting element 216 can The sixth light L6 is reflected to become the seventh light L7, and the seventh light L7 is incident on the image capturing module 220.

The image capturing module 220 receives the seventh light L7 reflected from the first beam splitting element 216. Since the pattern projected by the projection light E2 is reflected by the object O, distortion may occur due to the feature of the surface of the object O. Therefore, it can be constructed by judging the difference between the pattern represented by the seventh light L7 and the original pattern. A three-dimensional model of the object O.

3 and 4 respectively illustrate a scenario in which the objects O1 and O2 are scanned using the scanning device 200. In FIG. 3, when scanning the portions P1 to P2 of the object O1, the scanning device 200 emits the third light L3 _P1 and L3 _P2 to the portions P1 and P2, and respectively receives the reflected light of the object O1 on the portions P1 and P2. , that is, the fourth light L4 _P1 and L4 _P2 . The fourth lights L4 _P1 and L4 _P2 pass through the quarter wave plate 234 and become the fifth lights L5 _P1 and L5 _P2 . On the other hand, the fifth lights L5 _P1 and L5 _P2 become the sixth lights L6 _P1 and L6 _P2 after being reflected by the second beam splitting element 236, and the sixth lights L6 _P1 and L6 _P2 are reflected by the first beam splitting element 216 to become the seventh light L7. _P1 and L7 _P2 , and the seventh light L7 _P1 and L7 _P2 are incident on the image capturing module 220 and form imaging points I _P1 and I _P2 .

In FIG. 3, the scanning device 200 is operated in the first mode, at which time the angle between the reflective element 232 and the second beam splitting element 236 is θ _A , and the second beam splitting element 236 and the quarter wave plate 234 The angle between them is θ _B . In this embodiment, the angle between the reflective element 232 and the quarter-wave plate 234 is 45 degrees, and the angle θ _C between the sixth light L6 _P1 and the first light L1 can be known according to geometrical optics (ie, The angle between the six light L6 _P1 and the horizontal direction is substantially equal to 2θ _A , and the angle θ _{D of} the seventh light L7 _P1 incident image capturing module 220 is also equal to 2θ _A . Similarly, the angle between the sixth light L6 _P2 and the first light L1 is substantially equal to 2θ _A , and the angle of the seventh light L7 _P2 incident to the image capturing module 220 is also equal to 2θ _A .

In this embodiment, the distance between the third light L3 _P1 and L3 _P2 is d1, the distance between the sixth light L6 _P1 and L6 _P2 reflected by the second beam splitting element 236, and the reflection by the first beam splitting element 216. The distance between the seventh light L7 _P1 and L7 _P2 is also d1, and the distance d2 between the imaging points I _P1 and I _P2 formed on the image capturing module 220 can be expressed as (d1/cos θ _D ) or ( D1/cos2θ _A ). In other words, when the angle θ _A between the second beam splitting element 236 and the reflecting element 232 is larger, that is, when the angle θ _B between the second beam splitting element 236 and the quarter wave plate 234 is smaller, The distance d2 between the imaging points I _P1 and I _P2 formed on the module 220 increases, which in turn increases the discrimination rate of the scanning device 200.

In Fig. 4, the scanning device 200 scans the portions P1' to P2' of the object O2 in the second mode. When the scanning device 200 is operated in the second mode, the angle θ _A′ between the reflective element 232 and the second beam splitting element 236 may be greater than the angle between the reflective element 232 and the second beam splitting element 236 when the scanning device 200 operates in the first mode. Angle θ _A . Since the angle between the reflective element 232 and the quarter-wave plate 234 remains unchanged in FIGS. 3 and 4, the second beam splitting element 236 and the quarter-wave plate 234 are shown in FIG. The angle θ _{B '} between the second light splitting element 236 and the quarter wave plate 234 in FIG. 3 is smaller than the angle θ _B between the sixth light L6 _P1 and the first light L1 in FIG. The angle θ _C′ is greater than the angle θ _C between the sixth light L6 _P1 and the first light L1 in FIG. 3 , and the angle θ _D′ of the seventh light L7 _P1 incident image capturing module 220 in FIG. 4 is greater than In Fig. 3, the seventh light L7 _{P1 is} incident on the image capturing module 220 by an angle θ _D . Thus, in the third and fourth figures, the distance between the third light L3 _P1 and L3 _P2 is d1. The distance d2' between the imaging points I _{P1 ′} and I _{P2 ′} formed on the imaging module 220 in FIG. 4 is greater than the imaging point I _P1 formed on the imaging module 220 in FIG. 3 and The distance d2 between I _P2 . In other words, in the second mode, the scanning device 200 can present more details between the parts P1 to P2 of the object O2, so that the user can switch the operation mode of the scanning device 200 according to the surface features of the object to select an appropriate identification. rate.

In the embodiment of FIG. 2, in order to make the scanning device 200 in different modes, the angle between the first light L1 incident on the second beam splitting element 236 and the sixth light L6 reflected from the second beam splitting element 236 has a different size. The docking module 230 also includes an adjustment mechanism 238. In the case where the positions of the reflective element 232 and the quarter wave plate 234 are unchanged, the adjustment mechanism 238 can change the angle θ _A between the split polarizer of the second splitter element 236 and the mirror of the reflective element 232, and Changing the angle θ _B between the spectral polarizing plate of the second beam splitting element 236 and the quarter wave plate 234, thereby changing the angle θ _C between the first light L1 and the sixth light L6 and the incident image of the seventh light L7 The angle θ _{D of the} module 220. In this way, the scanning device 200 can adjust the angle between the first light L1 incident on the second beam splitting element 236 and the sixth light L6 reflected from the second beam splitting element 236 through the adjusting mechanism 238 in different modes. The user can adjust the discrimination rate of the scanning device 200 according to the surface characteristics of the object O.

FIG. 5 is a schematic diagram of scanning an object O1 by using a scanning device 300 according to another embodiment of the present invention. The scanning device 300 can include a projection module 210, an image capturing module 220, and a docking module 330. The mating module 330 includes a reflective element 232, a quarter wave plate 234, a second beam splitter 236, and an adjustment mechanism 338. The scanning device 300 is similar in operation to the scanning device 200. However, in order to facilitate projecting the projection light E2 to objects in various environments, such as but not limited to teeth in the patient's mouth, in a preferred embodiment, the scanning device can be The extension module 330 of the 300 is disposed at one end of the elongated extension mechanism 340, and the projection module 210 and the imaging module 220 are disposed in the grip mechanism 350, and the extension mechanism 340 and the grip mechanism 350 can be combined into a complete The hand-held mechanism is convenient for the user to operate.

In addition, in order to prevent the sixth light L6 from entering the inner wall of the extension mechanism 340 when passing through the extension mechanism 340, the image capturing module 220 cannot receive the reflected light from the object O1, and the scanning device 300 may further include the lens 360. Lens 360 can include a first end 360A, a second end 360B, and a lens 360C. The first end 360A of the lens 360 can extend from the projection module 210 and adjacent to the first beam splitting element 216, while the second end 360B of the lens 360 is opposite to the first end 360A, and the extending mechanism 340 can cover the lens 360 so that the object is attached. The module 330 can be adjacent to the second end 360B of the lens 360. The lens 360C can be disposed at the second end 360B for receiving the sixth light L6 reflected from the second beam splitting element 236, and can be used to adjust the traveling direction of the sixth light L6 to ensure the transfer process of the sixth light L6 in the lens 360. It does not enter the extension mechanism 340 and the inner wall of the lens 360.

In Fig. 5, the adjustment mechanism 338 includes a fixing screw 338A, a chute 338B, and a rotating shaft 338C. FIG. 6 is a schematic view showing the appearance of the adjustment mechanism 338. The fixing screw 338A is disposed at one end of the second beam splitting member 236, the sliding slot 338B is disposed on the extending mechanism 340, and the fixing screw 338A protrudes from the sliding slot 338B. The rotating shaft 338C is disposed at a junction of the reflective element 232 and the second beam splitting element 236. In this way, the user can move the fixing screw 338A on the outside of the extension mechanism 340 to move the fixing screw 338A in the sliding groove 338B. Since the reflective element 232 and the second beam splitter 236 are connected through the rotating shaft 338C, when the fixing screw 338A moves in the sliding groove 338B, the angle θ _A between the reflective element 232 and the second beam splitting element 236 also follows. Was changed.

In Fig. 5, the scanning device 300 is operated to scan the object O1 in the first mode. Figure 7 is a schematic diagram of scanning the object O2 by operating the scanning device 300 in the second mode. Since the surface of the object O2 has more details, such as cavities, the scanning device 300 needs to establish its stereo model with a higher discrimination rate. In FIG. 7, the user can adjust the angle between the reflective element 232 and the second beam splitter 236 by the set screw 338A of the adjustment mechanism 338, thereby switching the operation mode of the scanning device 300. Since the fixing screw 338A in Fig. 7 is closer to the quarter wave plate 234 than the fixing screw 338A in Fig. 5, the angle θ _A' between the reflecting member 232 and the second beam splitting member 236 in Fig. 7 It will be larger than the angle θ _A between the reflective element 232 and the second splitting element 236 in Fig. 5, and the angle θ _B' between the second splitting element 236 and the quarter wave plate 234 in Fig. 7 will It is smaller than the angle θ _B between the second beam splitting element 236 and the quarter wave plate 234 in Fig. 5, and thus the first light L1 incident on the second beam splitting element 236 and reflected from the second beam splitting element in Fig. 7 the angle θ _C 236 between the sixth light L6 _'may be greater than the angle θ _C between the first light L1 and the sixth light L6 in FIG. 5, while in FIG. 7 of the seventh L7 incident light camera module The angle of 220 will also be greater than the angle at which the seventh light L7 is incident on the image capturing module 220 in FIG. In this way, the image capturing module 220 can obtain more details on the surface of the object O2, and the discrimination rate of the scanning device 300 can be improved.

In summary, the user can adjust the angle between the first light L1 incident on the second beam splitting element and the sixth light L6 reflected from the second beam splitting element through the adjusting mechanism 238 or 338 to switch the scanning device 200 or 300. Different modes further adjust the discrimination rate of the scanning device 200 or 300. In this way, in the prior art, the user cannot adjust the discrimination rate of the scanning device according to the surface characteristics of the object, thereby causing the problem that the three-dimensional model of the object cannot be accurately established.

FIG. 8 is a schematic diagram of a scanning device 400 according to another embodiment of the present invention. The scanning device 400 differs from the scanning device 300 in that the interface module 430 of the scanning device 400 includes an adjustment in addition to the reflective component 232, the quarter wave plate 234, the second beam splitting component 236, and the adjusting mechanism 338. Agency 438. FIG. 9 is a schematic view showing the appearance of the adjustment mechanism 438. One end of the adjustment mechanism 438 is coupled to the reflective element 232 while the other end projects from the extension mechanism 340. In an embodiment, the adjustment mechanism 438 can be an adjustment screw. The user can change the distance between the reflective element 232 and the second beam splitting element 236 by changing the depth of the extension screw 340 by changing the adjusting screw, thereby adjusting the angle between the reflective element 232 and the second beam splitting element 236.

FIG. 10 is another schematic diagram of the scanning device 400. In Fig. 10, since the user further inserts the adjusting screw into the extending mechanism 340, the distance between the reflecting member 232 and the second beam splitting member 236 in Fig. 10 is higher than that in the reflecting member 232 in Fig. 8. The distance between the second beam splitting elements 236 is small. That is, in Fig. 8, the angle θ _A between the reflective element 232 and the second beam splitting element 236 is larger than the angle θ _{A '} between the reflective element 232 and the second beam splitting element 236 in Fig. 10.

In this way, the user can adjust the angle between the reflective element 232 of the scanning device 400 and the second beam splitting element 236 through the adjusting mechanisms 338 and 438. In addition, when the adjustment mechanism 438 is used to adjust the angle between the reflective element 232 and the second beam splitting element 236, the angle between the reflective element 232 and the quarter-wave plate 236 is also changed, thereby changing the incident angle of the light. The angle of one of the wave plates 236. Therefore, the user can select the adjustment mechanism 338 and 438 in an appropriate manner according to actual needs to meet the needs of scanning objects.

FIG. 11 is a schematic diagram showing a situation in which the scanning device 500 scans the object O1 according to another embodiment of the present invention. The scanning device 500 can include a projection module 210, an image capturing module 220, a docking module 530, an extension mechanism 540, a grip mechanism 550, and a lens 560. The module 530 includes a reflective element 232, a quarter wave plate 234, and a second beam splitter 236. Lens 560 includes a first end 560A, a second end 560B, and a lens 560C. The first end 560A of the lens 560 can extend from the projection module 210 and adjacent to the first beam splitting element 216, while the second end 560B of the lens 560 is opposite to the first end 560A, and the lens 360C can be disposed at the second end 360B. The operation principle of the scanning device 500 is similar to that of the scanning device 300. The difference is that the interface module 530 of the scanning device 500 does not include the adjustment mechanism 338. However, the interface module 530 is detachably coupled to the lens 560, such as the extension mechanism 540. It can be a mechanism that is free to be disassembled or assembled with the lens 560 (or the grip mechanism 550). Since the docking module 530 can be detached from the lens 560, when the user scans different objects by using the scanning device 500, a suitable docking module can be selected and assembled on the lens 560 according to the characteristics of the surface of the object.

Fig. 12 is a diagram showing the scanning device 500 scanning another object O2. In Fig. 11, since the surface of the object O1 is relatively smooth, the scanning device 500 does not need to establish its stereo model with a high discrimination rate. At this time, the scanning device 500 can operate in the first mode, that is, the user can connect the module. The 530 is coupled to the lens 560 such that the scanning device 500 has a lower discrimination rate to scan the object O1, and the first light L1 incident on the second beam splitting element 236 and the sixth light L6 reflected from the second beam splitting element 236 have a smaller angle. The angle θ _C . However, in FIG. 12, when the object O2 is scanned by the scanning device 500, since the surface of the object O2 has more detail and is rough, the user can detach the extension mechanism 540 from the lens 560 and the extension mechanism 540. 'Connected to the lens 560, so that the scanning device 500 operates in the second mode, when the first light L1 incident on the second beam splitting element 236 and the sixth light L6 reflected from the second beam splitting element 236 have a larger angle θ _C' (ie, the angle θ _{C' is} greater than the angle θ _C ), thereby increasing the discrimination rate of the scanning device 500.

In this way, the user can connect a suitable docking module to the lens 560 according to the characteristics of the surface of the object to adjust the discrimination rate of the scanning device 500. Therefore, the prior art can be avoided by the scanning device 500, because the discrimination rate cannot be adjusted depending on the surface characteristics of the object, and the problem of the three-dimensional model of the object cannot be accurately established.

In addition, although the reflective element 232 in the above embodiment is a mirror and the second splitting element 236 is a splitting polarizer, in practice, if each of the mating modules is to be used, the mirror and the spectroscopic polarizer are Having the same angle between them may increase the complexity of the process and result in a lower yield. Therefore, in other embodiments of the present invention, the reflective element and the second beam splitting element are also realized by the crucible.

Figure 13 is a schematic illustration of a scanning device 600 in accordance with another embodiment of the present invention. The scanning device 600 includes a projection module 210, an image capturing module 220, a docking module 630, an extending mechanism 540, a grip mechanism 550, and a lens 560. The module 630 includes a reflective element 632, a quarter wave plate 634, and a second beam splitting element 636. The scanning device 600 is similar in operation to the scanning device 500, except that the receiving module 630 further includes a first weir 638A and a second weir 638B. The first side 638A includes a first side M1 and a second side M2, and the second side 638B includes a third side M3 and a fourth side M4. The first face M1 of the first turn 638A overlaps the quarter wave plate 634, and the second face M2 of the first turn 638A may be coated with a split polarization layer to form the second splitter element 636. The second turn 638B is connected to the first turn 628A, the third face M3 of the second turn 638B may be coated with a total reflection coating layer to form the reflective element 632, and the fourth face M4 of the second turn 638B is overlapped The second side M2 of the first 稜鏡 638A.

In addition, the first 稜鏡 638A further includes a relay surface M5, and the relay surface M5 is connected to the first surface M1 and the second surface M2, and the first light L1 can sequentially penetrate the relay surface M5 and then enter the second surface. M2, the fourth surface M4 and the third surface M3, and the second light L2 generated by the first light L1 being reflected by the third surface M3 can be perpendicularly incident on the first surface M1. Since the interface module 630 of the scanning device 600 can use the cymbal to implement the reflective element and the second beam splitting element, the angle between the reflective element and the second beam splitting element can be directly determined by the angle of the cymbal, and no need to be performed. Adjustments, in turn, can increase the yield of the manufacturing scanning device 600.

Further, according to the law of refraction, when the sixth light L6 passes through the relay surface M5 (light-tight medium) of the first crucible 638A to the air (light-diffusing medium), the sixth light L6 that passes through the relay surface M5 and The angle between the first light L1 is also raised, that is, in FIG. 13, the angle θ _C between the sixth light L6 of the incident relay surface M5 and the first light L1 is smaller than the exiting relay surface M5. The angle θ _C' between the sixth light L6 and the first light L1. As such, the effect of adjusting the discrimination between the first light L1 incident on the second beam splitting element 236 and the sixth light L6 reflected from the second beam splitting element 236 to adjust the discrimination rate of the scanning device 600 will be more remarkable.

In summary, according to the scanning device provided by the embodiment of the present invention, the user can adjust the discrimination rate of the scanning device according to the characteristics of the surface of the object, thereby avoiding the prior art, because the surface characteristics of the object are different, Accurately establish the problem of the 3D model of the object.

The above are only the preferred embodiments of the present invention, and all changes and modifications made to the scope of the present invention should be within the scope of the present invention.

100, 200, 300, 400, 500, 600‧‧‧ scanning devices
T‧‧‧ teeth
A, B‧‧‧ parts of the teeth
C‧‧‧ hole
210‧‧‧Projection Module
220‧‧‧Image capture module
230, 330, 430, 530, 530', 630‧‧‧ Socket modules
340, 540, 540' ‧ ‧ extension agencies
350, 550‧‧ ‧ grip mechanism
360, 560‧ ‧ lens
212‧‧‧Light source components
214‧‧‧ imaging components
216‧‧‧First beam splitter
232, 232', 632‧‧‧ reflective elements
234, 234', 634‧‧‧ quarter wave plate
236, 236', 636‧‧‧ second beam splitter
238, 338, 438 ‧ ‧ adjustment agencies
338A‧‧‧ fixing screws
338B‧‧ ‧ chute
338C‧‧‧ shaft
638A, 638B‧‧‧稜鏡
360A, 560A‧‧‧ the first end of the lens
360B, 560B‧‧‧ second end of the lens
360C, 560C‧‧ lens
M1‧‧‧ first side
M2‧‧‧ second side
M3‧‧‧ third side
M4‧‧‧ fourth side
M5‧‧‧ Relay surface
O, O1, O2‧‧‧ objects
P1, P2, P1', P2'‧‧‧ parts of the object
I _P1 , I _P2 , I _P1 ', I _P2 '‧‧‧ imaging points
D1, d2, d2'‧‧‧ distance
E1‧‧‧ incident light
E2‧‧‧projection light
L1‧‧‧First light
L2‧‧‧second light
L3, L3 _P1 , L3 _P2 ‧‧‧ Third light
L4, L4 _P1 , L4 _P2 ‧‧‧fourth light
L5, L5 _P1 , L5 _P2 ‧‧‧ Fifth Light
L6, L6 _P1 , L6 _P2 ‧‧‧ sixth light
L7, L7 _P1 , L7 _P2 ‧‧‧ seventh light θ _A , θ _B , θ _A′ , θ _B′ , θ _C , θ _C′ , θ _D , θ _D′ ‧‧‧ angle

Figure 1 is a schematic illustration of the context of scanning a tooth using a prior art scanning device. Fig. 2 is a schematic view showing a scanning device according to an embodiment of the present invention. Figure 3 is a schematic diagram of a situation in which an object is scanned using the scanning device of Figure 2. Fig. 4 is a schematic diagram showing the situation in which another object is scanned by the scanning device of Fig. 2. Fig. 5 is a schematic view showing an object scanned by a scanning device according to another embodiment of the present invention. Fig. 6 is a schematic view showing an adjustment mechanism of the scanning device of Fig. 5. Fig. 7 is a schematic diagram showing the situation in which another object is scanned by the scanning device of Fig. 5. Figure 8 is a schematic view of an object scanned by a scanning device according to another embodiment of the present invention. Fig. 9 is a schematic view showing an adjustment mechanism of the scanning device of Fig. 8. Fig. 10 is a schematic diagram showing the situation in which another object is scanned by the scanning device of Fig. 8. Figure 11 is a schematic view of an object scanned by a scanning device according to another embodiment of the present invention. Fig. 12 is a schematic diagram showing the situation in which another object is scanned by the scanning device of Fig. 11. Figure 13 is a schematic view of a scanning device according to another embodiment of the present invention.

300‧‧‧ scanning device

210‧‧‧Projection Module

220‧‧‧Image capture module

330‧‧‧Access module

340‧‧‧Extension agencies

350‧‧‧ grip mechanism

360‧‧‧ lens

212‧‧‧Light source components

214‧‧‧ imaging components

216‧‧‧First beam splitter

232‧‧‧reflecting elements

234‧‧‧ Quarter wave plate

236‧‧‧Second beam splitter

338‧‧‧Adjustment agency

338A‧‧‧ fixing screws

338B‧‧ ‧ chute

338C‧‧‧ shaft

360A‧‧‧ the first end of the lens

360B‧‧‧ the second end of the lens

360C‧‧ lens

O1‧‧‧ objects

E1‧‧‧ incident light

E2‧‧‧projection light

L1‧‧‧First light

L2‧‧‧second light

L3‧‧‧ Third Light

L4‧‧‧fourth light

L5‧‧‧ Fifth Light

L6‧‧‧6th light

L7‧‧‧ seventh light

θ _A , θ _B , θ _C ‧‧‧ angle

Claims (12)

A scanning device for constructing a three-dimensional model of an object, comprising: a projection module, comprising: an imaging component, emitting a projection light to project a pattern, the projection light having a first polarization direction; and a first beam splitting An element for penetrating the projection light to become the first light having the first polarization direction; a substrate module for transmitting the first light, comprising: a reflective element for reflecting the first light The light is a second light; a quarter wave plate is disposed between the reflective element and the object, wherein the second light penetrates the quarter wave plate into a third light and is incident on the object, The third light is reflected by the object into a fourth light, and the fourth light penetrates the quarter wave plate into a fifth light having a second polarization direction, the second polarization direction and the first polarization The direction is vertical; and a second beam splitting element is disposed between the reflective element and the quarter wave plate for penetrating the first light and the second light, and reflecting the fifth light to become a sixth Light, and the first beam splitting element is further configured to reflect the sixth light to become a seventh And the image capturing module is configured to receive the seventh light reflected from the first beam splitting component; wherein the second beam splitting component and the quarter wave are when the scanning device operates in a first mode The sheet has a first angle, and when the scanning device is operated in a second mode, the second beam splitting element has a second angle with the quarter wave plate, and the first angle is opposite to the second angle different. The scanning device of claim 1, wherein the first beam splitting element is a beam splitting polarizer. The scanning device according to claim 1, wherein the imaging element is transmitted through a digital micromirror device (DMD), a dynamic grating generating device or a fixed grating generating device to project the pattern. The scanning device of claim 1, wherein the second beam splitting element is a beam splitting polarizer, and the reflecting element is a mirror. The scanning device of claim 4, wherein the receiving module comprises an adjusting mechanism for adjusting an angle between the spectral polarizing plate and the reflecting mirror. The scanning device of claim 1, further comprising: a lens comprising: a first end extending from the projection module adjacent to the first beam splitting element; and a second end opposite to the first end . The scanning device of claim 6, wherein the docking module is adjacent to the second end. The scanning device of claim 7, wherein the receiving module is detachably coupled to the lens. The scanning device of claim 7, wherein the object module further comprises: a first frame comprising: a first surface overlapping the quarter wave plate; and a second surface Coating a light-polarizing layer to form the second beam-splitting element; and a second layer connecting the first layer, comprising: a third surface coated with a total reflection coating layer to form the reflective element; a fourth side that overlaps the second side. The scanning device of claim 9, wherein the first device further comprises a relay surface, the relay surface is connected to the first surface and the second surface, and the first light penetrates the relay surface and is incident on the first surface a third side, and the second light is incident perpendicular to the first side. The scanning device of claim 1, wherein the quarter wave plate is at a 45 degree angle to the reflective element. A scanning device for constructing a three-dimensional model of an object, comprising: a projection module, comprising: an imaging component, emitting a projection light to project a pattern, the projection light having a first polarization direction; and a first beam splitting An element for penetrating the projection light to become the first light having the first polarization direction; a substrate module for transmitting the first light, comprising: a reflective element for reflecting the first light The light is a second light; a quarter wave plate is disposed between the reflective element and the object, wherein the second light penetrates the quarter wave plate into a third light and is incident on the object, The third light is reflected by the object into a fourth light, and the fourth light penetrates the quarter wave plate into a fifth light having a second polarization direction, the second polarization direction and the first polarization The direction is vertical; and a second beam splitting element is disposed between the reflective element and the quarter wave plate for penetrating the first light and the second light, and reflecting the fifth light to become a sixth Light, and the first beam splitting element is further configured to reflect the sixth light to become a seventh And the image capturing module is configured to receive the seventh light reflected from the first beam splitting component; wherein when the scanning device operates in a first mode, the first light and the sixth light have a first The third angle, and when the scanning device operates in a second mode, the first light and the sixth light have a fourth angle, and the third angle is different from the fourth angle.