TWI805100B - scanning device - Google Patents

Abstract

The invention discloses a scanning device, which includes a light source module and an adjustment module. The light source module generates scanning light. The adjustment module adjusts the optical path of the scanning light. The adjustment module includes a deflection unit intersecting the optical path of the scanning light. The deflection unit rotates around the first axis, and the intersection point of the scanning light and the deflection unit crosses the deflection unit as the deflection unit rotates, so that the scanning light emitted from the deflection unit is based on the deflection unit The optical characteristics of the deflection unit change its optical path. The deflection unit includes a plurality of deflection parts. Each deflection part is used to change the light path of the outgoing light on the corresponding plane. The planes are different planes, so that the scanning light can generate more scanning range.

Description

scanning device

The present invention relates to a scanning device, in particular to a scanning device capable of adjusting the outgoing direction of scanning light to form a corresponding scanning range.

Scanning devices used to detect the surface contour of an object, the distance to surrounding objects, or other similar purposes usually use scanning light (such as laser light or other light sources) to irradiate surrounding objects and obtain reflected light radiation for identification.

The control of the light path of the scanning light by the known scanning device is usually to rotate the entire scanning device together with the generating device of the scanning light repeatedly, so that the scanning light sweeps around. This driving method is to simultaneously drive the scanning light. In addition to the complexity of the driving mechanism, the generating device also greatly increases the volume of the scanning device, and also poses certain risks to the stability of the scanning light (such as errors caused by vibration), resulting in high overall production costs and maintenance costs, as well as an increase in weight .

One object of the present invention is to reduce the volume of the scanning device.

Another object of the invention is to reduce the degree of risk of the scanning device having instability.

Another object of the present invention is to expand the scanning range and application level of the scanning device.

Another object of the present invention is to enable the scan resolution to be easily adjusted.

To achieve the above and other objectives, the present invention proposes a scanning device, comprising: a light source module and an adjustment module. The light source module generates scanning light. The adjustment module includes a deflection unit that intersects with the optical path of the scanning light. The deflection unit rotates around a first axis. The intersection point of the scanning light and the deflection unit follows the The rotation of the deflection unit spans (across) the deflection unit, and changes the optical path of the scanning light emitted from the deflection unit, wherein, the axial direction of the first axis is the same as the axis of the incident deflection unit The scanning rays are parallel, intersect and the acute angle of the intersection is less than 90 degrees, or skewed and projected onto the same plane, the acute angle of the intersection is less than 90 degrees.

In one embodiment of the present invention, the deflection unit may have a plurality of light refraction areas, and each light refraction area makes the scanning light passing through the light refraction area, along with the rotation of the deflection unit, in the outgoing direction It is gradually deflected from one side to the other side, thereby forming a scanning range.

In one embodiment of the present invention, the light refraction regions can be arranged continuously around the first axis in the adjustment module, and the scanning light traverses the refraction unit repeatedly as the deflection unit rotates. In the equal light refraction area, the optical path of the scanning light emitted from each light refraction area changes in one direction or back and forth within the scanning range.

In an embodiment of the present invention, the deflection unit is a sheet, and the sheet surrounds the first axis. The radial axis of the sheet can be perpendicular to the first axis. The light refraction regions can be formed by the optical structure on the surface of the sheet.

In one embodiment of the present invention, each of the light refraction regions may have a first deflection region, and the adjacent first deflection regions present a bulge in the radial direction of the sheet body and gradually Reduced, the scanning range is composed of the scanning light emitted from the first deflection area.

In one embodiment of the present invention, each of the light refraction regions may have a second deflection region and a third deflection region, and the second deflection region is raised from the outer periphery of the sheet and faces toward both sides Gradually lowering and gradually decreasing along the radial direction of the sheet toward the center of the sheet, the third deflection zone is raised from the inner peripheral edge of the sheet and gradually decreases toward both sides and away from the center of the sheet The radial direction of the sheet gradually decreases, and the scanning range is composed of scanning light emitted from an adjacent half of the second deflection area and half of the third deflection area.

In one embodiment of the present invention, the deflection unit includes a plurality of deflection parts, each of which has a plurality of light refraction areas, and each light refraction area makes the scanning light across the light refraction area follow the The rotation of the deflection unit forms a gradual deflection from one side to the other side in the outgoing direction, thereby forming a scanning range.

In an embodiment of the present invention, the area of each of the light refraction regions of the deflection portion adjacent to the light source module is greater than the area of each of the light refraction regions of the deflection portion far away from the light source module.

In one embodiment of the present invention, the number of the deflecting parts of the deflecting unit is two, and the two deflecting parts are a combined deflecting unit of two sheets or a compound type of a single sheet. The deflection unit, the combined deflection unit has a corresponding deflection portion on a single sheet, and the composite deflection unit has corresponding deflection portions on two opposite surfaces of a single sheet .

In one embodiment of the present invention, the adjustment module may include a driving unit, the driving unit drives a rotating shaft as the first shaft to rotate the rotating shaft, and the deflection unit surrounds the first shaft And is set on the axis of rotation.

In one embodiment of the present invention, the light source module may include a plurality of light emitting units, each of which is arranged on the same side of the deflection unit, and the corresponding scanning light generated by each of the light emitting units is in line with The deflection units have different intersection points and provide different scanning planes.

In an embodiment of the present invention, the light source module may include a plurality of light receiving units for receiving light radiation fed back after being irradiated by corresponding scanning light rays, and each light emitting unit corresponds to at least one light receiving unit.

In one embodiment of the present invention, the light source module may include a light emitting unit and a light receiving unit, the light emitting unit generates the scanning light, and the light receiving unit receives the feedback from the scanning light light radiation.

In one embodiment of the present invention, the light receiving unit can be set adjacent to the light emitting unit and located on a scanning plane, the scanning plane is after the scanning light passes through the rotating deflection unit, The extension of a plane area scanned by the light path of the scanning light emitted from the deflection unit.

Accordingly, the present invention adjusts the outgoing light path of the scanning light through the deflection unit on the adjustment module. In addition, there is a certain degree of difference between the rotation axis of the deflection unit and the direction of the incident light path of the deflection unit. The spatial configuration relationship also reduces the number of components that need to be driven in the scanning device. In addition to reducing the volume of the scanning device and stabilizing the optical path, the scanning resolution can be based on the rotation speed and the easy design of the optical structure of the deflection unit. , and can further improve the scanning range and application level of the scanning device.

100: Light source module

101:Scanning Rays

110, 111: light emitting unit

120, 121: light receiving unit

200: Adjustment module

201: first axis

210, 210', 210": deflection unit

211: The first deflection part

212: the second deflection part

220: rotating shaft

230: drive unit

A: Light refraction area

A1: The first deflection zone

A2: Second deflection zone

A2-1: Second deflection half area

A3: The third deflection zone

A3-1: Third deflection half area

L: label segment

MD: direction of movement

SR: scan range

SRf: front scan range

SR1~3: Rear scanning range

SL: outgoing scanning light

SL1~5: outgoing scanning light

SLD1: Outgoing front-end scanning light

SLD2: the outgoing scanning light

SP1~3: Scan point

RD: direction of rotation

[ FIG. 1 ] is a schematic diagram of a scanning device and corresponding generated light paths according to an embodiment of the present invention.

[ FIG. 2 ] is a three-dimensional schematic diagram of a scanning device according to an embodiment of the present invention.

[ Fig. 3 ] is a schematic diagram of light path changes in an embodiment of the present invention.

[ Fig. 4 ] is a perspective view of the scanning device in the first embodiment of the present invention.

[ Fig. 5 ] is a perspective view of a scanning device in a second embodiment of the present invention.

[ FIG. 6 ] is a partial structural schematic view of the deflection unit in FIG. 5 from the side edge toward the axis.

[ Fig. 7 ] is a schematic three-dimensional view of a partial structure of the deflection unit in Fig. 5 .

[ FIG. 8 ] is a schematic diagram of the structure and light path of the second deflection half region of the deflection unit in FIG. 5 .

[ FIG. 9 ] is a schematic diagram of the structure and light path of the third deflection half region of the deflection unit in FIG. 5 .

[ Fig. 10 ] is a perspective view of a scanning device in a third embodiment of the present invention.

[ Fig. 11 ] is a schematic perspective view of a scanning device in a fourth embodiment of the present invention.

[ Fig. 12 ] is a schematic perspective view of a scanning device in a fifth embodiment of the present invention.

[ Fig. 13 ] is a schematic diagram of the light path in Fig. 10 .

In order to fully understand the purpose, features and effects of the present invention, the present invention will be described in detail through the following specific embodiments and accompanying drawings, as follows:

In this document, the term "a" or "an" is used to describe a unit, component, structure, device, module, system, location or region, etc. This is done for illustrative purposes only, and A general sense of the scope of the invention is provided. Accordingly, such description should be read to include one or at least one and the singular also includes the plural unless it is obvious that it is otherwise meant.

In this document, the described terms "comprising, including, having" or any other similar terms mean that they are not limited to the elements listed herein, but may include elements not explicitly listed but described, Other elements normally inherent in a component, structure, device, module, system, site or area.

In this article, the words "first" or "second" and similar ordinal numbers described are used to distinguish or refer to the same or similar elements or structures, and do not necessarily imply such elements, structures, parts Or the spatial order of regions. It should be understood that in some cases or configurations, ordinal terms may be used interchangeably without affecting the practice of the present invention.

Please refer to FIG. 1 , which is a schematic diagram of a scanning device and corresponding generated light paths according to an embodiment of the present invention. The scanning device includes a light source module 100 and an adjustment module 200 . The light source module 100 generates scanning light 101 , and the scanning light 101 can be used for irradiation or for generating reflected light and so on. The scanning light 101 is incident on the adjustment module 200, and the optical path of the scanning light 101 is changed due to the optical characteristics of the adjustment module 200, and the outgoing light path of the scanning light 101 is changed with the operation of the adjustment module 200. The scanning light 101 has a light path that changes with time, such as the light paths of the outgoing scanning lights SL1 - SL5 in FIG. 1 .

The light source module 100 and the adjustment module 200 can be assembled together to form a module, or assembled through other racks, or two independent components.

The scanning light 101 with a single incident light path can further form a scanning range SR based on the adjustment module 200, and the size of the scanning range SR can be determined by the optical characteristics of the adjustment module 200, for example: different A series of surface variations consisting of optical structures. The mod 200 can have a first axis 201 as an axis, and the adjustment module 200 operates according to the first axis 201, so that the operation of the light source module 100 can be independent of the adjustment module 200, and the scanning light can be reduced. The degree of risk of having an unstable light path.

The light source module 100 can be used to generate a highly collimated laser beam. The light source module 100 is, for example, a laser diode or other highly collimated light sources. For another example, such as a surface-emitting vertical cavity surface-emitting laser (Vertical-Cavity Surface-Emitting Laser, VCSEL).

Please refer to FIG. 2 , which is a perspective view of a scanning device according to an embodiment of the present invention. In this embodiment, the adjusting module 200 includes a driving unit 230 , a rotating shaft 220 and a deflecting unit 210 . The rotating shaft 220 serving as the first shaft 201 is connected to the driving unit 230 , and the deflecting unit 210 is disposed on the rotating shaft 220 . The deflection unit 210 has the aforementioned optical structure for changing the path of the light emitted from the deflection unit 210 . The deflecting unit 210 surrounds the rotating shaft 220, which can make when the driving unit 230 drives the rotating shaft 220, the deflecting unit 210 can be correspondingly driven to rotate around the rotating shaft 220 (Fig. 2 One direction of rotation RD) is exemplified. With the rotation of the deflection unit 210 , the scanning light 101 generated by the light source module 100 at a fixed position can pass through a constantly changing optical structure, thereby causing different deflection degrees in the exiting light path.

In addition, through the design and arrangement of the optical structure on the deflection unit 210, the outgoing light path can be designed to be gradually deflected from one side to the other side, and repeatedly make the outgoing light path according to This change, wherein, the change mode of the light path deflection can be round-trip or one-way, one-way such as the optical structure of the deflection unit shown in Figure 3 or Figure 4, and the round-trip is such as Figures 5 to 9 The optical structure of the illustrated deflection unit. In this way, with the rotation of the deflection unit 210 , an outgoing light with a scanning range SR can be formed. Furthermore, through the design and arrangement of the optical structure on the deflection unit 210, deflection regions with different deflection ranges can be configured on the same deflection unit 210, As the scanning light 101 passes through different deflection regions, different scanning ranges SR can be correspondingly generated. The optical structures on the deflection unit 210 can be designed and arranged in different degrees according to corresponding requirements.

The light source module 100 shown in FIG. 2 is a single light-emitting unit as an example. In other implementations, multiple light-emitting units can also be arranged on the same side of the deflection unit 210 according to requirements, but each light-emitting unit is located at At different positions, the deflection unit 210 is used simultaneously to generate a plurality of different scanning ranges (refer to the example of FIG. 9 ). Wherein, each scanning range may define a corresponding scanning plane. In addition, each light emitting unit can correspondingly emit light of different wavelengths as a distinction.

Next, please refer to FIG. 3 and FIG. 4 at the same time. FIG. 3 is a schematic diagram of light path changes in an embodiment of the present invention, and FIG. 4 is a perspective schematic diagram of a scanning device in a first embodiment of the present invention. The light path change shown in FIG. 3 is based on the result produced by the deflection unit shown in FIG. 4 . The deflection unit 210' is driven so that it moves in a moving direction MD relative to the scanning light 101, so that the intersection point of the scanning light 101 and the deflection unit 210' can follow the movement of the deflection unit 210'. Move across the deflection unit 210'. As shown in FIG. 3 , when the scanning light 101 entering the deflection unit 210 ′ exits the deflection unit 210 ′, the outgoing light path of the scanning light 101 will be deflected based on the difference in the refractive index of different media. As shown in FIG. 3 , the optical path of the outgoing scanning light SL is shifted. In addition, with the movement of the deflection unit 210', the scanning light 101 entering the deflection unit 210' is equivalent to passing through a constantly changing optical structure. On the light path, the light path of the outgoing scanning light SL is gradually deflected to form the scanning range SR. Wherein, the amplitude of the scanning range SR can depend on the refractive index of the deflection unit 210', and when a material with a larger refractive index is used, the amplitude of the scanning range SR can be wider. In addition, the scanning range SR is on the deflection unit 210 ′ illustrated in FIG. 3 , which can make the light path show a unidirectional deflection change.

The deflection unit 210' shown in Fig. 3 is only a part of the range, presenting two consecutively arranged light refraction regions A, and the optical structure of each light refraction region has five-order surface changes, which is only an example and is not intended to be used. This is the limit. The number of layers of the surface change of the optical structure is related to the resolution of the scan. The more the number of layers, the more helpful the improvement of the resolution. Of course, the resolution also depends on another control factor: the deflection unit 210' is relative to the The faster the moving speed of the scanning light 101 and the higher the number of layers, the higher the resolution. In addition, in addition to the layered optical structure surface shown in Figure 3, a continuously distributed curved surface structure without significant layer distribution can also be used, for example: the number of layers is very large and generally presents an optical structure similar to a curved surface, or It is an optical structure that is directly shaped into a curved surface without the number of layers.

Taking Figure 3 as an example, the scanning state shown is: the scanning state is from left to right in the left photorefraction area A (first deflection area A1), and then enters the right photorefraction area A and then again Shows the scanning state from left to right. Such repeated operations form that the light path can present repeated unidirectional deflection changes in the scanning range SR, which becomes a scanning function achieved as the deflection unit 210 ′ is driven. Wherein, the light refraction area A on the right may have the same optical structure as that of the first refraction area A1.

In the embodiment of the present invention, the deflection unit 210 ′ takes the first axis 201 as a moving axis or a rotating axis, and presents a state of winding around the first axis 201 . The light source module 100 enables the scanning light 101 incident on the deflection unit 210' to appear parallel to the axial direction of the first axis 201; or, the scanning light 101 can be parallel to the axial direction of the first axis 201. There is an intersection point in the distance, and the acute angle at the intersection is less than 90 degrees; or, the scanning light 101 can be oblique to the axial direction of the first axis 201 without intersection point, and when the scanning light 101 and the axial direction of the first axis 201 are projected onto the same plane, the acute angle formed at the intersection is less than 90 degrees.

Generally speaking, the configuration of the scanning function allows the scanning light 101 to be roughly parallel to the axial direction of the first axis 201, that is, even if the scanning light 101 can be far away from the axial direction of the first axis 201 There is an intersection point, and the acute angle of the intersection is usually configured at less than 30 degrees; and, when the scanning light 101 and the axial direction of the first axis 201 are skewed, after projecting onto the same plane, the formed intersection The acute angle is also less than 30 degrees. In addition, when there is a demand for other directions, the aforementioned acute angle can also be controlled to be less than 80 degrees, so that the scanning range SR can be changed to a greater extent.

Next, please refer to FIG. 4 , the deflection unit 210 ′ is in the shape of a sheet, and takes the first axis 201 as the axis of rotation. In addition, the sheet body of the deflection unit 210 ′ is perpendicular to the first axis 201 in the radial direction.

In the deflection unit 210' shown in FIG. 4, a light refraction area A for illustration includes a first deflection area A1. The structural features of the plurality of first deflecting regions A1 that are connected together continuously are raised in the radial direction of the deflecting unit 210 ′ and gradually decrease toward both sides, thereby forming the first deflecting regions A1. The scanning range SR is composed of the scanning light SL emitted from the first deflection area A1. Regarding the deflection unit 210 ′ shown in FIG. 4 , reference may also be made to FIG. 3 in a top view, which presents the optical structure and the corresponding light path change from the side edge of the deflection unit 210 ′ toward the axis.

Next, please refer to FIGS. 5 to 7. FIG. 5 is a perspective view of the scanning device in the second embodiment of the present invention; FIG. 6 is a partial structural view of the deflection unit in FIG. 5 from the side edge toward the axis; FIG. 7 It is a three-dimensional schematic diagram of a partial structure of the deflection unit in FIG. 5 . Please refer to FIG. 5 , the deflection unit 210 ″ is also in the shape of a sheet, and takes the first axis 201 as the axis of rotation.

In the deflection unit 210" illustrated in FIG. 5, a light refraction area A used for illustration includes a second deflection area A2 and a third deflection area A3. The second deflection area A2 It rises from the outer periphery of the deflecting unit 210" and gradually decreases towards both sides, and gradually decreases toward the center of the deflecting unit 210" along the radial direction of the deflecting unit 210". The third deflection area A3 is raised from the inner peripheral edge of the deflection unit 210 ″ and gradually decreases towards both sides and gradually decreases away from the center of the sheet along the radial direction of the deflection unit 210 ″.

Fig. 6 is based on the position of the marked segment L in Fig. 5, and an example is shown from the side edge of the deflection unit 210 "toward the axial direction, showing a partial structural schematic view. Fig. 6 and Fig. 7 also It shows that the deflection unit 210 ″ is raised from the outer periphery and gradually lowered toward both sides, and it is raised from the inner periphery and gradually lowered toward both sides, and there are differences in optical structures between the two. In addition, the layer changes of the optical structures shown in Figures 6 to 9 can also be a continuous distribution of curved surface structures without significant layer distribution, for example: the number of layers is very large and generally presents an optical structure similar to a curved surface , or an optical structure directly shaped into a curved surface without the number of layers.

Please refer to FIG. 8 and FIG. 9 at the same time. FIG. 8 is a schematic diagram of the structure and light path of the second deflection half area of the deflection unit in FIG. 5; FIG. Schematic diagram of the light path. The optical structure of the deflection unit 210" shown in Figures 5 to 9 is to provide the scanning light 101 incident on the deflection unit 210 at the position corresponding to the light source module 100 illustrated in Figure 2, the The scanning range SR will show a change in the scanning direction up and down (take the rotation direction RD of the deflection unit 210 ″ in FIG. 5 as an example), so that the light path shows a back-and-forth deflection change. Therefore, if the position of the light source module 100 is arranged at the position on the 3 o'clock direction of the deflection unit 210" shown in Fig. 5 (viewed from the incident direction of the scanning light 101, not shown in Figs. 5-7) On the contrary, the scanning range SR will show a change in the scanning direction which repeats left and right (taking the rotation direction RD of the deflection unit 210 ″ in FIG. 5 as an example). Accordingly, according to This optical characteristic sets the position of the light source module 100 to achieve the effect of different scanning planes. In addition, any position of the deflection unit 210" with the light refraction area A can produce a deflection effect on the incident light to achieve the scanning function, which also makes a scanning device according to the embodiment of the present invention, can carry There are more scanning paths, and the scanning range and application level of the scanning device are improved.

Furthermore, according to the optical structure of the deflection unit 210" shown in Fig. 5 and Fig. 8 and Fig. 9, the aforementioned round-trip scanning range SR is formed by the second deflection unit half adjacent to each other. Area A2 and half of the scanning light SL emitted by the third deflection area A3, that is, the reciprocating scanning range SR is composed of the second deflection half area A2-1 and the third deflection half area A3 -1 scanning light SL. Based on the difference in the optical structure of the second deflection area A2 and the third deflection area A3 compared to the first deflection A1 area, it is reflected on the outgoing scanning light SL , presents a round-trip or one-way optical path change, and the difference in the orthogonal relationship between the scanning planes. In the examples in Figures 5 to 9, in order to highlight the hierarchical differences in the optical structure, only the legend out of lesser classes.

In addition, the optical structure of the deflection unit (210', 210") is not limited to the aforementioned aspects of Fig. 4 and Fig. 5, any device that can be used to deflect the incident light to achieve the desired scanning range Optical structures or other media are applicable.

Next, please refer to FIG. 10 , which is a perspective view of a scanning device in a third embodiment of the present invention. The light source module 100 illustrated in FIG. 10 includes a light emitting unit 110 and a light receiving unit 120 . The light emitting unit 110 is used for generating the scanning light 101 . The light receiving unit 120 is used for receiving the light radiation fed back after being irradiated by the outgoing scanning light SL. In this way, the distance measurement of the scanned object can be achieved, and further, based on the distance measurement of each scanning point within the scanning range, the back-end computing and processing device can be used to estimate the outline of the scanned object. The scanning object can be a specific target or the surrounding environment. In addition, regarding the scanning range SR illustrated in FIG. 10 , the deflection unit 210 forming the scanning range SR may be, for example, the deflection unit 210 ′ illustrated in FIG. 4 .

Please refer to FIG. 11 , which is a perspective view of a scanning device in a fourth embodiment of the present invention. In this embodiment, the light source module 100 may include light emitting units 110 , 111 and corresponding light receiving units 120 , 121 . Compared with FIG. 10 , FIG. 11 also illustrates that the light receiving units are correspondingly arranged according to the scanning plane defined by the scanning range SR except that the light emitting unit and the light receiving unit included in the light source module 100 are plural. The scanning plane is an extension of a plane area scanned by the light path of the outgoing scanning light SL emitted from the deflecting unit 210 after the scanning light 101 passes through the rotating deflecting unit 210 . In addition, a single light emitting unit can also be matched with at least two light receiving units correspondingly. Furthermore, regarding the scanning range SR shown in FIG. 11 , the deflection unit 210 forming the scanning range SR may be, for example, the deflection unit 210 ″ shown in FIG. 5 .

Next, please refer to FIG. 12 and FIG. 13 , FIG. 12 is a perspective view of a scanning device in a fifth embodiment of the present invention; FIG. 13 is a schematic view of an optical path in FIG. 12 . In this embodiment, the deflection unit 210 can be a composite deflection unit of a single piece or a combined deflection unit of multiple pieces. No matter what kind of deflection unit is used, it can provide the incident scanning light 101 to undergo at least two different degrees of deflection. Under such a configuration, the scanning range SR formed by the outgoing scanning light SL can have more angles, and a wider scanning range can be provided by deflecting units in a limited configuration space. And expand the applicable level.

As shown in FIG. 12 and FIG. 13 , in this embodiment, two sheet-shaped first deflecting portions 211 and second deflecting portions 212 are combined into one deflecting unit 210 . After the scanning light 101 passes through the first deflection unit 211, the outgoing front scanning light SLD1 forms the front scanning range SRf, and the outgoing front scanning light SL1 then passes through the second deflection unit 212 to form the outgoing rear scanning light SLD2. shown in Figure 13 In the example, in order to highlight the difference between the scanning ranges of the rear segment, only a part of the scanning range of the rear segment is drawn as an example.

The rear scanning light SLD2 forms the rear scanning range SR1~3, the front scanning range SRf is in a different plane from the rear scanning range SR1~3, and the extension direction of each plane of the rear scanning range SR1~3 is basically determined by the corresponding It is determined by scanning light SLD1 in the front section. That is, the first deflecting part 211 can determine the scanning direction of the subsequent scanning range, and the second deflecting part 212 can determine the scanning range (or scanning area) on this scanning plane.

Accordingly, during the time when the previous scanning light SL1 is continuously maintained in the same outgoing direction, the scanning light is allowed to pass through the corresponding deflection area on the second deflection portion 212 (such as the first deflection area A1 in FIG. 4 ); then , allowing the front scanning light SL1 to be deflected into another outgoing direction, and allowing the scanning light to pass through another corresponding deflection area on the second deflection portion 212 (such as another first deflection area A1 in FIG. 4 ) . Repeating this way, scanning points SP1 , SP2 , and SP3 on different planes as shown in FIG. 13 can be formed.

As illustrated in FIG. 13 , the scanning point SP1 forms a scanning line, the height of this scanning line is defined by the first deflection part 211 , and the width of this scanning line is defined by the second deflection part 212 to define. As for the pitch between the scanning points SP1, it can be determined by the number of different levels or the changing state of the optical structure of the second deflecting part 212 . Regardless of whether the first deflecting portion 211 and the second deflecting portion 212 are configured coaxially or non-coaxially (separately driven), the two deflecting portions must match each other to form a proper scanning state. The rotational speed at which the deflection unit is driven can determine the required range (or area size) of the first deflection portion 211 to maintain the same optical structure.

The denser the number of changing levels or changing state of the optical structure of the second deflecting part 212 is, the longer the effective scanning distance can be under the premise of the minimum scanning resolution and without considering light intensity attenuation. The configuration of the first deflecting portion 211 is basically subject to the configuration of the second deflecting portion 212, but Similarly, the denser the number of layers or the changing state of the optical structure of the first deflecting part 211 can be, the longer the effective scanning distance can be and the more the number of scanning points can be.

In other words, the area extended by each step in each light refraction region of the first deflecting portion 211 must correspond to the area of the optical structure on the second deflecting portion 212 for forming a scanning range. Therefore, the area of each of the light refraction regions of the deflection portion adjacent to the light source module 100 is larger than the area of each of the light refraction regions of the deflection portion away from the light source module 100 .

In addition, when the deflecting unit 210 is a composite deflecting unit of a single body, the surface on the side close to the light source module can be used to form the optical structure of the first deflecting part 211, while the opposite side can form the first deflecting part 211. The optical structure of the two deflection parts 212 can further prevent the volume of the scanning device from increasing under the coaxial arrangement.

In each embodiment of the present invention, the arc-shaped deflection unit 210 is only an example, and is not limited to the arc-shaped edge, and other shapes are also applicable to the present invention.

To sum up, the present invention adjusts the outgoing light path of the scanning light through the deflection unit on the adjustment module, and there is a certain degree of space between the rotation axis of the deflection unit and the direction of the incident light path incident on the deflection unit. Configuration relationship. In addition, on the basis that the scanning resolution can be based on the rotation speed and the optical structure of the deflection unit, it is easier to increase the scanning range and scanning resolution of the scanning device and expand other application levels or even be configured in wearable devices. in the electronic device.

The present invention has been disclosed above with preferred embodiments, but those skilled in the art should understand that the embodiments are only used to describe the present invention, and should not be construed as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the embodiment should be included in the scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the scope of the patent application.

101:Scanning Rays

210: deflection unit

211: The first deflection part

212: the second deflection part

SRf: front scan range

SR1~3: Rear scanning range

SLD1: Outgoing front-end scanning light

SLD2: the outgoing scanning light

SP1~3: Scan point

Claims (11)

A scanning device, comprising: a light source module that generates scanning light; and an adjustment module that includes a deflection unit intersecting with the optical path of the scanning light, and the deflection unit is centered on a first axis While rotating, the intersection point of the scanning light and the deflecting unit crosses the deflecting unit as the deflecting unit rotates, and changes the optical path of the scanning light emitted from the deflecting unit, wherein, The deflecting unit includes a plurality of deflecting parts that rotate around the first axis. The scanning light incident to the adjustment module passes through the deflecting parts in sequence and then exits. Each deflecting part is used for The light path of the emitted light is changed on the corresponding plane, and the planes corresponding to the deflection parts are different planes. The scanning device according to claim 1, wherein the axial direction of the first axis and the scanning light incident on the deflection unit are parallel, intersect and the acute angle at the intersection is less than 90 degrees, or are skewed and projected to the same The acute angle of the intersection formed on the planes is less than 90 degrees. The scanning device as described in claim 1, wherein the number of the deflecting parts of the deflecting unit is two, and the two deflecting parts are a combined deflecting unit of two sheets, and the combined deflecting unit The folding unit has a corresponding deflection portion on a single piece. The scanning device as described in Claim 1, wherein the number of the deflecting parts of the deflecting unit is two, and the two deflecting parts are a compound deflecting unit of a single piece, and the compound deflecting The unit is attached to two opposite faces of a single sheet with corresponding deflections. The scanning device as claimed in claim 1, wherein each of the deflection parts has a plurality of light refraction areas, and each light refraction area makes the scanning light passing through the light refraction areas follow the rotation of the deflection unit in the outgoing direction The upper part is gradually deflected from one side to the other side, thereby forming a scanning range. The scanning device as described in claim 5, wherein the area of each of the light refraction regions of the deflection portion adjacent to the light source module is larger than the area of each of the light refraction regions of the deflection portion away from the light source module area. The scanning device as described in claim 5, wherein each of the light refraction regions away from the deflection part of the light source module has a first deflection region, and the first deflection region is in the radial direction of the sheet It rises in the direction and gradually decreases toward both sides. The scanning range is composed of the scanning light emitted from the first deflection area. The scanning device as described in claim 7, wherein each of the light refraction regions adjacent to the deflection portion of the light source module has a second deflection region and a third deflection region, and the second deflection region is Raised from the outer peripheral edge of the sheet and gradually lowered toward both sides and gradually lowered toward the center of the sheet along the radial direction of the sheet, the third deflection zone is raised from the inner peripheral edge of the sheet and gradually decrease toward both sides and away from the center of the sheet along the radial direction of the sheet, the scanning range is composed of adjacent half of the second deflection area and half of the third deflection composed of districts. The scanning device according to any one of claims 1 to 8, wherein the adjustment module includes a driving unit, the driving unit drives a rotating shaft as the first shaft to rotate the rotating shaft, and the deflection The unit is arranged on the rotation axis around the first axis. The scanning device as described in any one of claims 1 to 8, wherein the light source module includes a plurality of light emitting units, each of which is arranged on the same side of the deflection unit, and each of the light emitting units is The generated corresponding scanning light lines have different intersection points with the deflection unit to provide different scanning planes. The scanning device as described in Claim 10, wherein the light source module includes a plurality of light receiving units that receive the light radiation fed back after being irradiated by the corresponding scanning light, and each of the light emitting units corresponds to at least one of the light receiving units unit.

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