KR20170000645A

KR20170000645A - Multi camera mounting structure and method and device for aligning optical axis for multi camera module using the same

Info

Publication number: KR20170000645A
Application number: KR1020150089832A
Authority: KR
Inventors: 이권; 도승선; 김영창
Original assignee: 이래오토모티브시스템 주식회사
Priority date: 2015-06-24
Filing date: 2015-06-24
Publication date: 2017-01-03
Also published as: KR101906871B1

Abstract

The multiple camera mounting structure for mounting a plurality of cameras includes a plurality of lens cases each having first and second lens exposure holes arranged so that lenses of a plurality of cameras are exposed while being spaced apart from each other, A mount for fixing the camera to an external structure, and a plurality of optical axis alignment holes for aligning the optical axes of the plurality of cameras.

Description

Technical Field [0001] The present invention relates to a multi-camera mounting structure, and a method and apparatus for aligning an optical axis of the multi-camera module using the same.

The present invention relates to a multi-camera mounting structure for a multi-camera module including a plurality of cameras, and a method and apparatus for aligning optical axes of the multi-camera module using the same.

In the case of a single camera, the optical axis between the lens and the lens holder, that is, the image sensor, can be easily aligned. However, in the case of a multi-camera module with two or more cameras, it was impossible to evaluate or measure the alignment of the two optical axes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a multi-camera mounting structure for mounting a plurality of cameras, and a method and an apparatus for aligning optical axes of a plurality of cameras using the multi- .

The multiple camera mounting structure for mounting a plurality of cameras according to an embodiment of the present invention includes a plurality of lenses each having first and second lens exposure holes arranged so that lenses of a plurality of cameras are exposed in a state of being spaced apart from each other, A case, a connection part connecting the plurality of lens cases, a mount part for fixing the camera case to an external structure, and a plurality of optical axis alignment holes for aligning the optical axes of the plurality of cameras.

The plurality of optical axis alignment holes may include a first optical axis alignment hole formed at the center of the connecting portion in the horizontal direction, a pair of optical axis alignment holes formed at the same distance from the center of the first and second lens exposure holes, And a third optical axis alignment hole formed in the mount portion.

The multi-camera optical axis aligning apparatus according to an embodiment of the present invention includes the above-described multi-camera mount structure and a light irradiating unit for irradiating light passing through each of the plurality of optical axis aligning holes.

A method of aligning an optical axis of a multi-camera according to an embodiment of the present invention is a method of aligning the optical axes of a plurality of cameras using the multi-camera optical axis aligning apparatus, wherein the light passing through the pair of second optical axis alignment holes reaches Aligning a center of a point on a reference line connecting a point where light passing through the first optical axis alignment hole reaches and a point where the third optical axis alignment groove reaches, To-one correspondence with each other.

According to the present invention, the optical axis of each camera can be easily and accurately aligned in a multi-camera module provided with a plurality of cameras.

1 is a front view of a multi-camera mounting structure according to an embodiment of the present invention.
FIG. 2 is a view for explaining alignment of an optical axis through light projection in an optical axis aligning apparatus including a multi-camera mounting structure according to an embodiment of the present invention.
3 is a view for explaining the alignment of the optical axes of the individual cameras in the optical axis alignment method according to the embodiment of the present invention.
FIG. 4 is a view for explaining alignment of optical axes through alignment of reference lines of a plurality of cameras in an optical axis alignment method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, a multi-camera mounting structure 100 according to an embodiment of the present invention is configured to mount a plurality of cameras. In FIG. 1, a case where the multi-camera mounting structure 100 is configured to mount two cameras 10 and 20 is illustrated as an example. However, the multi-camera mounting structure may be configured to mount three or more cameras It is possible. Hereinafter, a case where two cameras 10 and 20 are installed in the multi-camera mounting structure 100 will be described.

Referring to FIGS. 1 and 2, the multi-camera mounting structure 100 includes two lens cases 110 and 120. The lens cases 110 and 120 include a first lens exposure hole 111 and a second lens exposure hole 121 arranged such that the lenses 11 and 21 of the two cameras 10 and 20 are spaced apart from each other, Respectively. The lens case 110 or 120 may be a lens holder for directly fixing the lens of the camera or a front cover for covering the outer side of the lens holder.

And a connection part 130 connecting the plurality of lens cases 110 and 120 is provided. That is, the connection portion 130 may be disposed between the lens cases 110 and 120. For example, as shown in the drawing, the connection portion 130 and the lens cases 110 and 120 may be formed as a single member have.

Mounting portions 140 and 150 for fixing to the external structure may be provided. For example, the mounting portions 140 and 150 may be provided outside the lens case 110 and 120, which are disposed at the outermost positions.

In the camera mounting structure 100, a plurality of optical axis alignment holes are formed.

First, a first optical axis alignment hole 131 is formed at the center of the connection portion 130 in the transverse direction. In this case, the first optical axis alignment holes 131 may be formed vertically so as to facilitate alignment of the optical axes. For example, as shown in the drawing, three first optical axis alignment holes 131 are formed along the vertical direction .

On the other hand, a pair of second optical axis alignment holes 113 and 123 are formed vertically above and below the lens exposure holes 111 and 121, respectively. At this time, the pair of second optical axis alignment holes 113 and 123 may be arranged at the same distance vertically from the center of the lens exposure holes 111 and 121, And may be formed to be parallel to the holes 111 and 121 (see FIG. 2).

And third optical axis alignment holes 141 and 151 are formed in the mount portions 140 and 150, respectively. At this time, the third optical axis alignment holes 141 and 151 may be formed at the centers of the mount portions 140 and 150. [

At this time, the center points of the first optical axis alignment hole 131, the lens exposure holes 111 and 121, and the third optical axis alignment holes 141 and 151 formed in the center of the connection portion 130 are aligned on the same straight line in the horizontal direction . &Lt; / RTI > In this case, however, the optical axis of the camera may not be aligned in a desired state due to a manufacturing error of the multi-camera mounting structure 100 and an installation error of the cameras 10 and 20. [ When the optical axis aligning apparatus according to the embodiment of the present invention is used, the optical axis of the cameras 10 and 20 can be accurately aligned in a desired state even in this case.

2, an apparatus for aligning a multi-camera optical axis according to an exemplary embodiment of the present invention includes a multi-camera mounting structure 100 and a light irradiation unit 200. Referring to FIG.

The light irradiation unit 200 may be disposed behind the multi-camera mounting structure 100 and may be any light source, such as a laser light source, that is capable of directing the direct light to the multi-camera mounting structure 100 . At this time, the light irradiation unit 200 can be formed and arranged so that the irradiated light can pass through the optical axis alignment holes of the multi-camera mount structure 100. [ The light irradiation unit 200 may be composed of a single light source or a plurality of light sources.

The test chart 300 is disposed in front of the multi-camera mounting structure 100 in a state in which the light irradiation unit 200 is operated and the point where the light having passed through the optical axis alignment holes reaches the test chart 300 do.

For example, the light having passed through the first optical axis alignment hole 131 reaches a point indicated by P1 of the test chart 300 and the light passing through the second optical axis alignment holes 113 and 123 passes through the test chart 300 And the light that has passed through the third optical axis alignment holes 141 and 151 reaches a point indicated by P31 and P32 of the test chart 300. In this case,

The optical axis alignment can be performed using the point where the light having passed through the respective optical axis alignment holes reaches the test chart 300. Hereinafter, the optical axis alignment method will be described with reference to FIGS. 3 and 4 .

First, referring to FIG. 3, up and down optical axis alignment for individual cameras can be performed, and the optical axis alignment can be performed for each individual camera.

Referring to Fig. 3, a method of performing alignment of the optical axis with respect to the left camera of Fig. 2 will be described.

3 (a), a point P 1 at which light passing through the first optical axis alignment hole 131 of the connection part 130 reaches, and a third optical axis alignment hole 151 of the mount part 150 And the light passing through the pair of second optical axis alignment holes 123 passing through the upper and lower portions of the lens case 120 When the center point C2 of each of the reached points P22 and P22 is spaced from the reference line CL1 by the distance G1, the vertical angle of the camera lens is adjusted by the spaced distance, As shown, the optical axis alignment can be performed by having the center point C2 on the reference line CL1. Although not shown in the drawings, the optical axis alignment process described with reference to FIG. 3 may be performed in the same manner as the camera positioned on the right side of FIG. Whereby the centers of the cameras on both sides can be aligned on the reference line.

Hereinafter, with reference to FIG. 4, a method of performing vertical alignment of the vertical axes between cameras arranged left and right will be described.

First, as shown in FIG. 4 (a), the vertical height between the center lines CL1 and CL2 on both right and left sides of the upper and lower optical axes aligned as shown in FIG. 3 for each of the left and right cameras If there is a difference, vertical alignment between the two cameras is performed. That is, when the reference line CL1 of the left portion and the reference line CL2 of the right portion are spaced apart by the separation distance G2 in the vertical direction, the optical axis of the left camera is raised or the optical axis of the right camera is down The reference lines CL1 and CL2 on both sides can be aligned vertically as shown in Fig. 4 (b).

While the present invention has been particularly shown and described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, And all changes and modifications to the scope of the invention.

100: Multi camera mounting structure
10, 20: camera
110, 120: Lens case
111, 121: lens exposure hole
130:
140, 150: Mount portion
131: first optical axis alignment hole
113, 123: Second optical axis alignment hole
141, 151: Third optical axis alignment hole
200: light irradiation unit

Claims

A multi-camera mounting structure for mounting a plurality of cameras,
A plurality of lens cases each having first and second lens exposure holes arranged so that lenses of a plurality of cameras are exposed while being spaced apart from each other,
A connecting portion connecting the plurality of lens cases,
A mounting portion for fixing to an external structure, and
And a plurality of optical axis alignment holes for aligning optical axes of the plurality of cameras.

The method of claim 1,
The plurality of optical axis alignment holes
A first optical axis alignment hole formed at the center of the connection portion in the transverse direction,
A pair of second optical axis alignment holes each formed at an equal distance from the center of the first and second lens exposure holes in the vertical direction of the lens exposure hole,
And a third optical axis alignment hole formed in the mount portion.

The multi-camera mounting structure of claim 2, and
And a light irradiation unit for irradiating light passing through each of the plurality of optical axis alignment holes.

A method of aligning the optical axes of a plurality of cameras using the multi-camera optical axis alignment apparatus of claim 3,
Wherein a center of a point at which light having passed through the pair of second optical axis alignment holes reaches a reference line connecting a point at which light having passed through the first optical axis alignment hole reaches a point at which the third optical axis alignment groove reaches Respectively, and
And aligning the reference lines of the plurality of lens cases with each other in the vertical direction.