KR20180051146A - Light emitting module and lidar - Google Patents

Abstract

The present invention relates to a light emitting module, and light detection and ranging (LiDAR) including the same. According to one embodiment of the present invention, the light emitting module comprises: a light emitting unit; a lens module through which light output from the light emitting unit is transmitted; and a reflection module through which the light transmitted through the lens module is reflected. At least one of the light emitting unit and the lens module is driven to change a path of the light transmitted through the lens module. The reflection module rotates to change a path of the light reflected by the reflection module.

Description

[0001] LIGHT EMITTING MODULE AND LIDAR [0002]

This embodiment relates to an optical output module and a laser diode.

The following description provides background information for the present embodiment and does not describe the prior art.

Light Detection and Ranging (LiDAR) is a device that measures the distance or atmospheric phenomenon by emitting pulsed laser light into the atmosphere and using the reflector or scatterer to measure the light. It is also called a laser radar.

Lida has been used for weather observation and distance measurement, but recently it has been studied for autonomous navigation.

Lidar includes an optical output module that irradiates light onto an object, and a light receiving module that detects light (recurrent light) reflected from the object.

In general, a plurality of light emitting elements are used and rotated to secure a field of view (FOV, filed of view, scanning range) of Lidar (motor type). However, There is an undesirable problem.

The present embodiment provides an optical output module capable of securing a wide viewing angle (vertical and horizontal range) with a single light emitting device and a ladder including such an optical output module.

The optical output module according to the present embodiment includes: a light emitting portion; A lens module through which the light output from the light emitting unit is transmitted; Wherein at least one of the light emitting unit and the lens module is driven to change a path of light transmitted through the lens module, It is possible to change the path of the light reflected by the reflection module.

Wherein the lens module comprises: a collimator lens unit for converting light output from the light emitting unit into parallel light; And a steering lens unit that changes a path of light transmitted through the collimator lens unit.

The steering lens unit may be driven in a direction perpendicular to the optical axis of the collimator lens unit.

The lens module may further include an enlargement lens unit for enlarging a field of view (FOV) of light transmitted through the steering lens unit.

The reflection module can rotate in a range of 180 degrees or less.

The reflection module may be a MEMS mirror.

The driving of at least one of the light emitting unit and the lens module may change the path of the light transmitted through the lens module in the vertical range and the rotation of the reflection module may change the path of the light reflected by the reflection module in the horizontal range.

The light emitting unit may perform at least one of tilting, rotating, moving in the optical axis direction of the lens module, and moving in an inclined direction with respect to the optical axis of the lens module.

The moving direction of the light emitting portion and the inclination angle of the optical axis of the lens module may be vertical.

The lens module may be driven by performing at least one of tilting, rotating, moving in the optical axis direction of the lens module, and moving in an inclined direction with respect to the optical axis of the lens module.

The moving direction of the lens module and the tilt angle of the optical axis of the lens module may be vertical.

The rotation axis of the reflection module may be inclined with respect to the optical axis of the lens module.

The rotation axis of the reflection module may be perpendicular to the optical axis of the lens module.

A light emitting module according to the present embodiment includes an optical output module; And a light receiving module in which light output from the light output module is recycled and input, the light output module comprising: a light emitting portion; A lens module through which the light output from the light emitting unit is transmitted; Wherein at least one of the light emitting unit and the lens module is driven to change a path of light transmitted through the lens module, It is possible to change the path of the light reflected from the reflection module.

According to the optical output module of this embodiment, at least one of the light emitting unit and the lens module is driven to change the path of the light output from the light emitting unit in the vertical range, and the path of the light output from the light emitting unit in the horizontal range, Change it. Therefore, the optical output module of this embodiment is a single light source and can have an angle of view enlarged in both the vertical and horizontal directions. Further, the present embodiment provides a ladder including such a light output module.

Fig. 1 is a conceptual diagram showing a la in this embodiment.
2 is a conceptual diagram showing an optical output module of the present embodiment in which a reflection module is omitted.
3 is a conceptual diagram illustrating driving of the light emitting unit or the lens module in the optical output module of the present embodiment excluding the reflection module.
FIG. 4 is a conceptual diagram showing a scanning spot as a field of view (FOV, filed of view, scanning range) of the optical output module of the present embodiment in a normal state and a state in which the light emitting unit and / or the lens module are driven.
5, 6 and 7 are conceptual diagrams showing a state in which the reflection module is rotated in the optical output module of the present embodiment.
8 is a conceptual diagram showing a scanning spot (FOV, filed of view, scanning range) of the optical output module of the present embodiment in a state in which the light emitting unit and / or the lens module are driven and the reflection module is rotated .

Hereinafter, some embodiments of the present invention will be described with reference to exemplary drawings. In describing the components in the drawings, the same components are denoted by the same reference numerals whenever possible, even if they are displayed on other drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected, coupled, or connected to the other component, It is to be understood that another element may be "connected "," coupled ", or "connected" between elements.

Hereinafter, a description will be given of a case according to the present embodiment. FIG. 1 is a conceptual diagram showing a light emitting module according to the present embodiment, FIG. 2 is a conceptual view showing an optical output module of the present embodiment excluding a reflection module, FIG. FIG. 4 is a conceptual view illustrating the driving of the lens module. FIG. 4 is a conceptual diagram illustrating the driving of the lens module in the normal state and the scanning angle of the optical output module of the present embodiment in the state where the light emitting unit and / 5, 6 and 7 are conceptual diagrams showing a state in which the reflection module is rotated in the optical output module according to the present embodiment, FIG. 8 is a conceptual view showing a state in which the reflection module is rotated (FOV, filed of view, scanning range) of the optical output module according to the present embodiment is a scanning spot.

The ladder 1000 according to the present embodiment may include an optical output module 100 and an optical receiving module 200 as shown in FIG. The laser module 1000 may include an optical output module 100 for generating output light and irradiating the output light to an external subject S. Lada may include a light receiving module 200 in which light reflected on the subject S recurs. In this case, the recurrent light can be input to the light receiving module 200. [ The light input to the light receiving module 200 may be converted into a digital signal to provide various information about the subject S. Although it has been described above that the optical output module 100 and the optical receiving module 200 are separated from each other in the LADA 1000, the LADA 1000 of the present embodiment is not limited thereto. That is, the optical module 1000 and the optical receiver module 200 may be formed integrally with each other according to the present embodiment.

The optical output module 100 according to the present embodiment includes a light emitting unit 110, a lens module 120, a reflection module 130, a substrate (not shown), and first and second and third driving units . However, it should be noted that at least one of the substrate and the first, second, and third driving units may be omitted by a design request.

The light emitting unit 110 may be disposed apart from the lens module 120. The light emitting unit 110 may be spaced apart from the lens module 120 in the horizontal direction. In this case, the light emitting unit 110 may be disposed behind the lens module 120. The light emitting portion 110 may be disposed in alignment with the optical axis of at least some of the lenses constituting the lens module 120. The light emitting unit 110 can output light forward. The light emitting unit 110 can output infrared light. The light emitting unit 110 can output a laser. However, the light L1 outputted from the light emitting unit 110 is not limited to the light of the above-mentioned kind. The light L1 output from the light emitting unit 110 may be incident on the lens module 120. The light emitting unit 110 may be a laser diode or a VCSEL. The light emitting unit 110 may be a plurality of laser diodes or a plurality of VCSELs. The light emitting portion 110 may be electrically connected to a substrate to be described later. The light emitting portion 110 can be driven. The light emitting portion 110 may be mechanically connected to the first driving portion to be described later. On the contrary, the light emitting unit 110 may not be driven by a design request. In this case, the light emitting portion 110 can be mounted on the substrate.

The lens module 120 may be disposed apart from the light emitting portion 110. The lens module 120 may be spaced apart from the light emitting portion 110 in the horizontal direction. In this case, the lens module 120 may be disposed in front of the light emitting portion 110. The light L1 output from the light emitting unit 110 may be incident on the lens module 120. In this case, the light L1 output from the light emitting unit 110 can pass through the lens module 100. [ The light L2 transmitted through the lens module 120 can be incident on the reflection module 130. The lens module 120 may include one or more lenses. The lens module 120 may include six lenses. In this case, the lenses of the lens module 120 may be aligned to have optical axes. Also, at least one lens of the lens module 120 may be coupled to a lens barrel (not shown). The lens barrel may be a hollow lens holder having an internal space in the direction of the optical axis. Accordingly, the at least one lens of the lens module 120 can be accommodated in the inner space of the lens barrel by aligning the optical axis. The at least one lens of the lens module 120 may be divided into a first lens group 121, a second lens group 122, and a third lens group 123. However, according to the optical design, at least one of the first, second, and third lens groups 121, 122, 123 in the lens module 120 may be omitted. In this case, the first, second, and third lens groups 121, 122, and 123 may be accommodated in combination with the different lens barrels. The lens module 120 may be mechanically connected to the second driving unit to be described later. In this case, at least one of the lenses of the lens module 120 can be driven. On the contrary, the lens module 120 may not be driven by design request.

The first lens group 121 of the lens module 120 may be disposed at the rear end of the lens module 120. Therefore, in the first lens group 121, the light output from the light emitting unit 110 can be incident first. The first lens group may include at least one lens. The first lens group may include two lenses. The first lens group 121 may convert the light output from the light emitting unit 110 into parallel light. Generally, since the light L1 outputted from the light emitting portion 110 is dispersed, the first lens group 121 can concentrate the dispersed output light so as to be parallel to the optical axis. Therefore, the first lens group 121 may be a lens group having a plus-power. As a result, the first lens group 121 may be referred to as a "collimator lens portion ". The first lens group 121 can be accommodated in the lens barrel. The first lens group 121 may be mechanically connected to a second driving unit, which will be described later. In this case, at least one or more of the lenses of the first lens group 121 can be driven. On the contrary, the first lens group 121 may not be driven by design request.

The second lens group 122 of the lens module 120 may be disposed in front of the first lens group 121. [ The second lens group 122 may be disposed behind the third lens group 123, which will be described later. That is, the second lens group 122 may be disposed between the first and third lens groups 121 and 123. Therefore, in the second lens group 122, light transmitted through the first lens group 121 can be incident. The second lens group 122 may include at least one lens. The second lens group 122 can change the path of the light transmitted through the first lens group 121. [ That is, the direction of light finally output from the optical output module 100 can be determined by the second lens group 122. As a result, the second lens group 122 may be referred to as a "steering lens portion ". The second lens group 122 can be coupled to and accommodated in the lens barrel. The second lens group 122 may be mechanically connected to a second driving unit, which will be described later. In this case, at least one of the lenses of the second lens group 122 can be driven. On the contrary, the second lens group 122 may not be driven by a design request.

The third lens group 123 of the lens module 120 may be disposed in front of the second lens group 122. The third lens group 123 of the lens module 120 may be disposed at the forefront of the lens module 120. Therefore, in the third lens group 123, light transmitted through the second lens group 122 can be incident. Also, the light transmitted through the third lens group 123 can be incident on the reflection module 130. The third lens group 123 may include at least one lens. The third lens group 123 can enlarge the angle of view (FOV, filed of view) of the light transmitted through the second lens group 122. [ As a result, the third lens group 123 can be referred to as an "enlarged lens portion ". And the third lens group 123 can be coupled to and accommodated in the lens barrel. The third lens group 123 can be mechanically connected to the second driving unit, which will be described later. In this case, at least one of the lenses of the third lens group 123 can be driven. On the contrary, the third lens group 123 may not be driven by a design request.

Hereinafter, the driving of the light emitting unit 110 and the lens module 120 of the present embodiment will be described with reference to FIGS.

The light emitting unit 110 and / or the lens module 120 can be driven. That is, both the light emitting unit 110 and the lens module 120 may be driven, or only one of the light emitting unit 110 and the lens module 120 may be driven. In this case, driving of at least one of the light emitting unit 110 and the lens module 120 is performed by tilting (arrow A in Fig. 3), rotation (arrow B in Fig. 3) (Arrow C in Fig. 3) in a direction perpendicular to the optical axis of at least some of the lenses constituting the lens module 120 And moving in the direction of the arrow. In this case, the inclination of at least one of the light emitting unit 110 and the lens module 120 in the direction of the optical axis of the lens module 120 may be vertical.

At least one of the lenses of the lens module 120 can be driven when the lens module 120 is driven. That is, only one lens of at least one lens of the lens module 120 may be driven, or a plurality of lenses may be driven. For example, only the first lens group 121 can be driven by the lens module 120. In this case, at least one of the lenses of the first lens group 121 can be driven. Also, only the second lens group 122 can be driven by the lens module 120. In this case, at least one of the lenses of the second lens group 122 can be driven. Also, only the third lens group 123 can be driven by the lens module 120. In this case, at least one of the lenses of the third lens group 123 can be driven.

The driving of at least one of the light emitting unit 110 and the lens module 120 can generate a decenter of the light L1 output from the light emitting unit 110. [ The decenter of the light L1 output from the light emitting unit 110 is intended to drive at least one of the light emitting unit 110 and the lens module 120 to intentionally drive the light L1 outputted from the light emitting unit 110 May be incident on the lens module 120 at a position different from the normal position. That is, it may mean intentionally changing the lens surface on which the light is incident and changing the path of the finally output light. The decenter may be configured such that the light emitting portion 110 and / or the lens module 120 are tilted (arrow A in Fig. 3), rotated (arrow B in Fig. 3) (Arrow C in Fig. 3) in a direction perpendicular to the optical axis of at least some of the lenses constituting the lens module 120 Direction and at least one of moving in the direction of the arrow. In addition, when a decenter occurs, the light L1 output from the light emitting unit 110 has a refractive index different from that of the normal light and can transmit the light through the lens module 120. Therefore, as shown in FIG. 3, the path of light L2, L3, and L4 transmitted through the lens module 120 can be changed. That is, the light L2, L3, and L4 transmitted through the lens module 120 by driving at least one of the light emitting unit 110 and the lens module 120 may have various paths over time.

For example, in more detail, as shown in FIG. 2, the light L2 transmitted through the lens module 120 at a normal time may have a single path. However, when at least one of the light emitting unit 110 and the lens module 120 is driven to generate a decenter, the path of the light L3 and L4 transmitted through the lens module 120 may be varied have. That is, when the light emitting unit 110 and / or the lens module 120 are driven and deviated to one side than usual, the light L3 transmitted through the lens module 120 may be refracted upward and travel to another path have. When the light emitting unit 110 and / or the lens module 120 is driven and deviates to the other side than usual, the light L4 transmitted through the lens module 120 is refracted downward than usual, have. The path of the light L2, L3, and L4 transmitted through the lens module 120 by driving the light emitting unit 110 and / or the lens module 120 can be changed in the vertical range.

The driving of the light emitting portion 110 and / or the lens module 120 may be a reciprocating motion. The light emitting unit 110 and / or the lens module 120 can be driven to reciprocate between one side and the other side. Accordingly, the light L2, L3, and L4 transmitted through the lens module 120 can be alternated with the upper path, the intermediate path, and the lower path according to time. As a result, the Lada 1000 of the present embodiment can scan the upper side, the middle side, and the lower side alternately. In more detail, referring to FIG. 4, as shown in FIG. 4 (A), in the case of a general Lada, only one point can be scanned by a single light emitting unit. Although the angle of view of the light L2 transmitted through the lens module 120 in the above-described third lens group 123 (magnifying lens section) is enlarged, this is at a slight level. On the contrary, in the case of the LADA 1000 of the present embodiment, as shown in FIG. 4B, the path of the light L1 output from the single light emitting unit 100 is changed in the vertical range, , And the lower side can be all scanned. That is, in the case of the optical output module 100 of this embodiment, the angle of view (FOV) of the vertical range can be enlarged. Further, the path of the light L2, L3, and L4 transmitted through the lens module 120 can be controlled by controlling the driving speed, the direction and the reciprocation of the light emitting portion 110 and / or the lens module 120 . As a result, the angle of view of the vertical range of the optical output module 100 can be adjusted. Although it has been described in the above description that the angle of view (FOV) of the vertical range can be adjusted, it is obvious that the angle of view (FOV) of the horizontal and horizontal ranges can be adjusted according to the simple design change.

The reflection module 130 may be disposed apart from the lens module 120. The reflective module 130 may be horizontally spaced from the lens module 120. In this case, the reflection module 130 may be disposed in front of the lens module 120. Therefore, the light L2, L3, and L4 transmitted through the lens module 200 can be incident on the reflection module 130 and reflected. The reflective module 130 may be in the form of a plate having a front face and a rear face. Depending on the optical design, both the front and back surfaces of the reflective module 130 may be reflective surfaces. Depending on the optical design, only the front surface of the reflective module 130 may be a reflective surface. The reflection module 130 may be mechanically connected to the third driving unit and driven. Accordingly, the reflection module 130 may be a "MEMS mirror ". The reflective module 130 may be rotated. The rotation of the reflection module 130 may be a concept that includes both rotation and revolution. That is, a rotation axis exists in the reflection module 130 itself and can rotate. In this case, the rotation axis of the reflection module 130 may be perpendicular to the optical axis of the lens module 120 (see FIG. 5). Alternatively, the rotation axis of the reflection module 130 may be inclined with respect to the optical axis of the lens module 120 (See FIGS. 6 and 7). In a modification (not shown) of this embodiment, the reflection module 130 and the rotation axis may be spaced apart from each other. In this case, the reflection module 130 can revolve. In this case, the reflection module 130 can be mounted on the surface of the rotating body having a volume and revolve. In this case, the reflection surface of the reflection module 130 may be disposed perpendicular to the optical axis of the lens module 120. Alternatively, the reflective surface of the reflective module 130 may be disposed obliquely to the optical axis of the lens module 120. The rotation axis of the reflection module 130 may be parallel to the optical axis of at least some of the lenses constituting the lens module 120. In this case, the reflection surface of the reflection module 130 may be at an angle with the rotation axis or the optical axis of the lens.

Hereinafter, the operation of the reflection module 130 of the present embodiment will be described with reference to FIGS. The reflection module 130 of this embodiment can rotate. The reflection module 130 may rotate or revolve. The rotation or revolution of the reflection module 130 may belong to substantially the same technical idea. Therefore, only the case where the reflection module 130 rotates will be described below. The reflective module 130 may be in the form of a flat plate, in which case the vertical axis disposed at the center of the reflective module 130 may be a rotation axis.

 As described above, the rotation axis of the reflection module 130 may be parallel or perpendicular or inclined to the optical axis of the lens module 120. The light L2, L3, and L4 transmitted through the lens module 120 can be reflected from the reflection module 130 with a different reflection angle with time by the rotation of the reflection module 130. [ Therefore, as shown in FIGS. 5, 6 and 7, the paths of the lights L5, L6, L7, L8, L9, L10, L11, L12 and L13 reflected by the reflection module 130 can be changed. That is, the lights L5, L6, L7, L8, L9, L10, L11, L12, and L13 reflected by the reflection module 130 may have various paths.

5 shows the optical output module 100 of the present embodiment in which the rotation axis of the reflection module 130 is disposed perpendicular to the optical axis of the lens module 120. [ The light L2, L3, and L4 transmitted through the lens module 120 by the driving of at least one of the light emitting unit 110 and the lens module 120 can be alternated with the upper, middle, and lower paths according to time . That is, the angle of view of the optical output module 100 can be enlarged in the vertical range.

The path of the light L3 passing through the lens module 120 and traveling on the upper path can be changed by the rotating reflection module 130. [ More specifically, the angle of incidence of the light L3 passing through the lens module 120 and traveling on the upper path can be changed by the rotation of the reflection module 130. That is, the light L3 passing through the lens module 120 and traveling on the upper path may be reflected at a different reflection angle with time. Therefore, the light L5, L6, L7 reflected by the reflection module 130 after passing through the lens module 120 and traveling to the upper path can be dispersed in the horizontal direction. That is, the rotation of the reflection module 130 can change the path of the light L3 traveling in the upward direction through the lens module 120 in the horizontal range.

The path of the light L2 transmitted through the lens module 120 and traveling on the intermediate path can be changed by the rotating reflecting module 130. [ More specifically, the angle of incidence of the light L2 passing through the lens module 120 and traveling on the intermediate path can be changed by the rotation of the reflection module 130. That is, the light L2 transmitted through the lens module 120 and traveling on the intermediate path may be reflected at a different reflection angle with time. Therefore, the light L8, L9, and L10 reflected by the reflection module 130 after passing through the lens module 120 and traveling to the intermediate path can be dispersed in the horizontal direction. That is, the rotation of the reflection module 130 can change the path of the light L2 traveling in the intermediate direction through the lens module 120 in the horizontal range.

The path of the light L4 passing through the lens module 120 and traveling on the lower path can be changed by the rotating reflection module 130. [ More specifically, the angle of incidence of the light L4 transmitted through the lens module 120 and traveling along the lower path may be changed by the rotation of the reflection module 130. That is, the light L4 transmitted through the lens module 120 and traveling along the lower path may be reflected at a different reflection angle with time. Therefore, the light L11, L12, and L13 reflected by the reflection module 130 after passing through the lens module 120 and traveling to the lower path can be dispersed in the horizontal direction. That is, the rotation of the reflection module 130 can change the path of the light L4 traveling in the downward direction through the lens module 120 in the horizontal range.

Referring to FIG. 8A, the light L3 transmitted through the lens module 120 and traveling on the upper path may be reflected by the reflection module 130 and travel in various paths in the horizontal range. Therefore, the light L3 transmitted through the lens module 120 and traveling on the upper path can be scattered and scanned in the horizontal range (see L5, L6, and L7 in FIG. 8A). As a result, The horizontal range angle of view of the optical output module 100 can be enlarged. The light L2 transmitted through the lens module 120 and traveling through the intermediate path can be reflected by the reflection module 130 and travel in various paths in the horizontal range. Therefore, the light L2 transmitted through the lens module 120 and traveling on the upper path can be scattered and scanned in the horizontal range (see L8, L9, and L10 in FIG. 8A). As a result, The horizontal range angle of view of the optical output module 100 can be enlarged. In addition, the light L4 transmitted through the lens module 120 and traveling on the lower path can be reflected by the reflection module 130 and travel in various paths in the horizontal range. Therefore, the light L4 transmitted through the lens module 120 and traveling on the lower path can be scattered and scanned in the horizontal range (refer to L11, L12, and L13 in FIG. 8A). As a result, The horizontal range angle of view of the optical output module 100 can be enlarged.

The reflection module 130 can rotate 360 degrees according to design conditions. In this case, the reflection module 130 can rotate in one direction. In this case, both the front surface and the rear surface of the reflection module 130 may be a reflective surface. The reflection module 130 can rotate within a range of 180 degrees or less, depending on design conditions. That is, the reflection module 130 can perform the reciprocating rotation in the range of 180 degrees or less in one direction, and then in the reverse direction in the range of 180 degrees or less in the other direction. In this case, both the front surface and the rear surface of the reflection module 130 may be a reflective surface. The reflection module 130 can rotate within a range of 90 degrees or less, depending on design conditions. That is, the reflection module 130 can perform the reciprocating rotation in the range of 90 degrees in the one direction, and then in the reverse direction in the range of 90 degrees or less in the other direction. In this case, only the front surface of the reflection module 130 may be a reflective surface. The horizontal scanning range and order of the Lada 1000 of the present embodiment can be adjusted by the rotation of the various reflection modules 130 described above.

6 and 7 show the optical output module 100 of the present embodiment when the rotation axis of the reflection module 130 is inclined with respect to the optical axis of the lens module 120. [ FIG. 6 shows a case where the rotation axis of the reflection module 130 is inclined upwardly as it goes upward, and FIG. 7 shows a case where the rotation axis of the reflection module 130 is inclined downward as the rotation axis is upward.

L6, L7, L8, L9, L10, L11, L11, L11, L11, L11, L11, L10, L10, L10, and L10, which are reflected by the reflection module 130, as compared with the case where the rotation axis is perpendicular to the optical axis, when the rotation axis of the reflection module 130 is inclined upwardly. L12, and L13 can be moved downward. Since the reflection surface of the reflection module 130 is located at the front side as it goes downward, the light L3 passing through the lens module 120 and traveling in the upper path goes forward from the light L4 traveling in the lower path Lt; / RTI > Therefore, a scanning spot as shown in FIG. 8B can be displayed.

L6, L7, L8, L9, L10, L11, L11, L11, L11, L11, L11, L10, L10, L10, and L10, as compared with the case in which the rotation axis is perpendicular to the optical axis when the rotation axis of the reflection module 130 is inclined downward. L12, and L13 can move upward. The light L3 traveling through the lens module 120 passes through the lens module 120 and travels toward the rear of the lens module 120 as it goes from the light L3 traveling on the upper path to the light L4 traveling on the lower path, Lt; / RTI > Therefore, a scanning spot as shown in FIG. 8C can be displayed.

The angle of view FOV of the horizontal range of the optical output module 100 of the present embodiment can be enlarged by the reflection module 130. [ Further, the path of the light reflected by the reflection module 130 can be controlled by controlling the rotation speed, angle, direction, reciprocation of the reflection module 130, tilt of the rotation axis, and the like. As a result, the horizontal range angle of the optical output module 100 can be adjusted. Although it has been described in the above description that the angle of view (FOV) of the horizontal range can be adjusted, it is obvious that the angle of view (FOV) of the vertical and vertical ranges can be adjusted according to the simple design change.

The substrate may be electrically connected to the light emitting portion 110. In this case, the substrate can supply the current required for the output of the light emitting portion 110. The substrate may be electrically connected to the first, second and third driving units described later. In this case, the substrate can control the first, second and third driving parts. As a result, the substrate can control the driving speed, direction, reciprocation, etc. of the light emitting unit 110 and the lens module 120. In addition, the substrate can control the rotation speed, angle, direction, reciprocation of the reflection module 130, tilt of the rotation axis, and the like. The substrate 410 may be a printed circuit board (PCB). However, it is not limited thereto.

The first, second, and third driving units may drive the light emitting unit 110, the lens module 120, and the reflection module 130, respectively. The first driving unit may be mechanically connected to the light emitting unit 110 to drive the light emitting unit 110. The second driving unit may be mechanically connected to the lens module 120 to drive the lens module 120. In this case, the second driving unit can be coupled to at least one lens of the lens module 120. The second driving unit may be coupled to at least one of the first, second, and third lens groups 121, 122, 123 of the lens module 120. As a result, the lens of the lens module 120 can be divided into a driving lens and a non-driving lens. In addition, a plurality of drive lenses can be independently driven. In addition, the second driving unit can engage with the lens barrel of the lens module 120. In this case, the lens can be driven integrally with the lens barrel. The third driving unit may be mechanically connected to the reflection module 130 to drive the reflection module 130. The first and second driving units may be a motor, a servo motor, a voice coil motor (VCM), a micro-electro-mechanical systems (MEMS), or a piezoelectric element. The third driving unit may be a motor or micro-electro-mechanical systems (MEMS).

The first, second and third driving units may be electrically connected to the substrate. The first and second driving units 110 may control driving speed, direction, and reciprocation of the light emitting unit 110 and the lens module 120 by the substrate. The third driving unit can control the rotation speed, angle, direction, reciprocation of the reflection module 130, tilt of the rotation axis, and the like by the substrate.

In the light receiving module 200 of the present embodiment, the light output from the optical output module 100 can be recycled and input. The light receiving module 200 may include a light receiving sensor (not shown) and a substrate (not shown). In this case, the light receiving sensor can be mounted on the substrate. The light receiving sensor of the light receiving module 200 can sense the light output from the optical output module 100. Therefore, the reflected light reflected by the subject S can be input to the light receiving sensor. The light input to the light receiving sensor is converted into a digital signal and analyzed to derive various information.

The light receiving module may be manufactured by replacing the light emitting portion 110 with a light receiving sensor (not shown) in the optical output module. That is, the optical output module 100 and the optical receiving module 200 may be integrally formed.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all of the components may be selectively coupled to one or more of them. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

1000: Rada

Claims (14)

A light emitting portion;
A lens module through which the light output from the light emitting unit is transmitted; And
And a reflection module for reflecting light transmitted through the lens module,
At least one of the light emitting unit and the lens module is driven to change a path of light transmitted through the lens module,
Wherein the reflection module rotates to change a path of light reflected by the reflection module.
The method according to claim 1,
The lens module includes:
A collimator lens unit for converting light output from the light emitting unit into parallel light; And
And a steering lens unit for changing a path of light transmitted through the collimator lens unit.
3. The method of claim 2,
Wherein the steering lens unit is driven in a direction perpendicular to an optical axis of the collimator lens unit.
3. The method of claim 2,
Wherein the lens module further comprises an enlargement lens unit for enlarging a field of view (FOV) of light transmitted through the steering lens unit.
The method according to claim 1,
Wherein the reflection module rotates in a range of 180 degrees or less.
The method according to claim 1,
Wherein the reflective module is a MEMS mirror.
The method according to claim 1,
Wherein at least one of the light emitting unit and the lens module is driven by changing a path of light transmitted through the lens module in a vertical range,
Wherein rotation of the reflective module alters the path of light reflected by the reflective module in a horizontal range.
The method according to claim 1,
Wherein the light emitting unit is driven by performing at least one of tilting, rotating, moving in a direction of an optical axis of the lens module, and moving in an inclined direction with respect to an optical axis of the lens module.
9. The method of claim 8,
Wherein the moving direction of the light emitting portion and the inclination angle of the optical axis of the lens module are vertical.
The method according to claim 1,
Wherein the lens module performs at least one of tilting, rotation, movement in the direction of an optical axis of the lens module, and movement in an inclined direction with respect to an optical axis of the lens module.
11. The method of claim 10,
Wherein the moving direction of the lens module is perpendicular to the inclination angle of the optical axis of the lens module.
The method according to claim 1,
And the rotation axis of the reflection module is inclined with respect to the optical axis of the lens module.
13. The method of claim 12,
Wherein the rotational axis of the reflective module is perpendicular to the optical axis of the lens module.
Optical output module; And
And a light receiving module in which light output from the light output module is recycled and input,
The optical output module includes:
A light emitting portion;
A lens module through which the light output from the light emitting unit is transmitted; And
And a reflection module for reflecting light transmitted through the lens module,
At least one of the light emitting unit and the lens module is driven to change a path of light transmitted through the lens module,
The reflection module is a module that rotates and changes the path of light reflected from the reflection module.

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