WO2011134215A1

WO2011134215A1 - Stereoscopic camera device

Info

Publication number: WO2011134215A1
Application number: PCT/CN2010/075841
Authority: WO
Inventors: 李春雨
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-04-27
Filing date: 2010-08-10
Publication date: 2011-11-03
Also published as: CN201662682U

Abstract

A stereoscopic camera device comprises a camera module (21), a first plane reflective mirror (22), a second plane reflective mirror (23), a third plane reflective mirror (24), and a fourth plane reflective mirror (25). The camera module (21) comprises an optical imaging lens group (211) and an optical sensor (212). The first plane reflective mirror (22) is parallel to the second plane reflective mirror (23). The third plane reflective mirror (24) is parallel to the fourth plane reflective mirror (25). The four plane reflective mirrors are positioned before the optical imaging lens group (211). The optical imaging lens group (211) is positioned before the optical sensor (212). The device can improve the consistency of the optical paths and electrical performance during imaging.

Description

An image device

The utility model relates to the technical field of stereo imaging, in particular to a stereo camera device. Background technique

With the maturity of digital imaging technology, stereo imaging technology is rapidly developing. Stereoscopic imaging technology is mainly realized by the parallax characteristics of two eyes of human beings. The specific implementation methods mainly include: color separation method, light division method, time division method and grating method. Although there are many specific implementation methods, the principles of all implementations are similar, namely: using two cameras arranged side by side, two pictures with horizontal parallax are simultaneously captured, and the two cameras respectively represent the left eye and the right of the person. eye. During the screening, the two screens are respectively loaded into the left-eye projection device and the right-eye projection device, and the left-eye projection device and the right-eye projection device are synchronized, and the screen is projected to form a double shadow including the left-eye image and the right-eye image. image. The viewer uses some special equipment, such as polarized glasses, so that the left eye can only see the left eye image, the right eye can only see the right eye image, and then through the binocular convergence function, the left eye image and the right eye image respectively. Superimposed on the retina, the three-dimensional visual effect is produced by the brain nerves.

The above description explains: Regardless of which implementation is used, the key is that the image seen by the viewer's left eye and right eye must not be exactly the same, ie: the picture corresponding to the left eye is only observed by the left eye, corresponding to the right The picture of the eye is only observed by the right eye. In this way, a stereoscopic camera must have two cameras for imaging and processing the image. However, existing camera devices have some shortcomings, mainly in the following three aspects:

First of all, the two cameras may not be identical in physical performance, for example: the focal lengths are not exactly the same, so the two cameras are not completely consistent in focusing performance, which leads to the inconsistency of left and right video intelligibility, resulting in image blurring. . Secondly, there are errors in the installation alignment of the two cameras, which causes the images captured by the dual cameras to be inconsistent in the horizontal and oblique angles of the viewing angle, which leads to deviations in image processing, which ultimately leads to image superimposition.

Finally, the difference in electrical performance between the respective image sensors in the dual cameras causes the captured images to be inconsistent in characteristics such as brightness, contrast, chromaticity, grayscale, etc., which in turn causes visual differences between the left and right images, ultimately leading to visual perception of the viewer. Dizziness, blurred images, etc.

1 is a summary drawing of a Chinese patent "A Stereo Camera Device and Method" of Application No. 200910104853.9, which discloses a stereo camera device that uses a precision optical imaging structure to ensure uniformity on the optical path, using only one The technique of image sensor to receive two-way image, however, as seen in Figure 1, the patent has important technical defects, mainly in:

First, the optical paths of the first optical imaging lens group 111, the second optical imaging lens group 112, and the image sensor 120 are far apart. When shooting a distant view, according to the lens imaging rule, it is generally required that the optical imaging lens group and the image sensor have a relatively close optical path, otherwise the image will be blurred. Therefore, the device and method described in the patent cannot capture the distant view;

Secondly, since all the light in each of the rays emitted by the object can be imaged only after being reflected by the plane mirror at the same angle, the patent does not fully disclose the first planar mirror 114, the second planar mirror 115 and the third mirror 113. There is a certain technical detail in the position of the mirror, which may result in the inability to image on the image sensor 120, so that the purpose of shooting cannot be achieved at all. Summary of the invention

In view of the above, the main object of the present invention is to provide a stereo camera capable of capturing two images with parallax and identical electrical performance, and is suitable for shooting a distant view.

In order to achieve the above object, the technical solution of the present invention is realized as follows:

The present invention provides a stereo camera device, including: a camera module, a first planar mirror, a second planar mirror, a third planar mirror, and a fourth planar mirror;

The camera module includes: an optical imaging lens group, and an optical sensor; a mirror surface of the first planar mirror parallel to a mirror surface of the second planar mirror; a mirror surface of the third planar mirror parallel to a mirror surface of the fourth planar mirror;

The first planar mirror, the second planar mirror, the third planar mirror, and the fourth planar mirror are disposed in front of the optical imaging lens group; the optical imaging lens group is disposed In front of the optical sensor.

In the above solution, the distance between the center point of the first plane mirror and the center point of the third plane mirror is equal to or similar to the distance between the eyes of the person.

In the above solution, the first planar mirror and the third planar mirror are symmetrically disposed with the optical axis of the optical imaging lens group as an axis of symmetry; the second planar mirror and the fourth planar mirror The optical axes of the optical imaging lens groups are symmetrically arranged symmetrically.

In the above solution, the first planar mirror, the second planar mirror, the third planar mirror, and the fourth planar mirror have a rectangular or circular outer shape.

In the above solution, the optical imaging lens group is a convex lens.

In the above solution, the optical sensor is a CCD (Charge-coupled Device) image sensor or a complementary metal oxide semiconductor (CMOS, Complementary Metal Oxide Semiconductor) optical sensor.

The stereo camera device of the present invention has two pairs of plane mirrors disposed in front of the camera module with the optical axis of the optical imaging lens group as an axis of symmetry. The light reflected by the object passes through the two pairs of plane mirrors and is focused on the camera. The optical imaging lens assembly of the module uses an optical sensor to convert the sensitive light into an electrical signal, so as to ensure the consistency of the imaging optical path and ensure the electrical properties of the captured image are completely consistent. In addition, there is no two sets of plane mirrors between the optical imaging lens group and the optical sensor, and the relative distance is relatively close, which is also suitable for shooting distant scenes. DRAWINGS

1 is a summary drawing of a patent "a stereo camera device and method"; 2 is a top plan view of the stereo camera device of the present invention;

FIG. 3 is a light path diagram of the reflected light passing through in the embodiment of the present invention. detailed description

The basic idea of the utility model is: 保证 Using a precision optical imaging structure to ensure the consistency on the optical path, two pairs of plane mirrors are arranged in front of the camera, and when the device is used for shooting, the light reflected by the object passes through the two pairs of plane mirrors. , enters the camera; the reflected light of the object passes through the optical imaging lens set on the camera, focuses on the optical sensor, and uses only one image sensor to receive two images, ensuring that the electrical properties of the captured image are completely consistent.

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. 2 is a top view of a stereo camera device according to the present invention, as shown in FIG. 2, including: a camera module 21, a first planar mirror 22, a second planar mirror 23, a third planar mirror 24, and a fourth Planar mirror 25; wherein

The camera module 21 includes: an optical imaging lens group 211, and an optical sensor 212. The mirror surface of the first plane mirror 22 is parallel to the mirror surface of the second plane mirror 23; the mirror surface of the third plane mirror 24 is parallel to the mirror surface of the fourth plane mirror 25;

The distance between the center point of the first plane mirror 22 and the center point of the third plane mirror 24 is equal to or similar to the distance between the eyes of the person. Generally, the value of the pitch may be 65 mm, or the spacing may be taken. The value is any value between 65 ± 10 mm to ensure that the human eye sees a clear stereoscopic image; the first planar mirror 22 and the third planar mirror 24 are optically imaged with the optical axis of the optical imaging lens group 211 as the axis of symmetry. The front surface of the lens group 211 is symmetrically disposed; the second planar mirror 23 and the fourth planar mirror 25 are symmetrically disposed on the front side of the optical imaging lens group 211 with the optical axis of the optical imaging lens group 211 as an axis of symmetry;

The optical imaging lens group 211 is disposed in front of the optical sensor 212;

The front surface refers to the configuration of the stereo camera device from the direction of the optical sensor 212 after the stereo camera device is laid flat. The optical imaging lens group 211 is disposed in the optical sensor 212. The front surface, the first plane mirror 22, the second plane mirror 23, the third plane mirror 24, and the fourth plane mirror 25 are disposed in front of the optical imaging lens group 211, and further, the second plane mirror 23 And the fourth plane mirror 25 may be disposed in front of the first plane mirror 22 and the third plane mirror 24;

The distance between the second plane mirror 23 and the fourth plane mirror 25 can be arbitrarily set within a distance that can be reflected to the light.

The outer shape of the first plane mirror 22, the second plane mirror 23, the third plane mirror 24, and the fourth plane mirror 25 may be rectangular or may be circular.

The first plane mirror 22 reflects the light emitted by the object, and the reflected light is irradiated to the second plane mirror 23; the second plane mirror 23 reproduces the light reflected by the first plane mirror 22 twice. Reflecting, the reflected light is irradiated to the optical imaging lens group 211 in the camera module 21;

The optical imaging lens group 211 in the camera module 21 focuses the light reflected by the second planar mirror 23, and the focused light is irradiated to the optical sensor 212 in the camera module 21; the third planar mirror 24 will capture the object. The emitted light is reflected once, and the reflected light is irradiated to the fourth plane mirror 25; the fourth plane mirror 25 re-reflects the light reflected by the third plane mirror 24, and the reflected light is irradiated to the camera. The optical imaging lens group 211 in the module 21;

The optical imaging lens group 211 in the camera module 21 focuses the light reflected by the fourth plane mirror 25, and the focused light is irradiated to the optical sensor 212 in the camera module 11; the optical sensor 212 will be sensitive to the camera. The focused light of the optical imaging lens group 211 in the module 21 is converted into an electrical signal.

The optical imaging lens group 211 may be a convex lens; the optical sensor 212 may be a CCD image sensor, or may be a CMOS optical sensor.

The present invention will be further described in detail below with reference to the embodiments. 3 is an optical path diagram through which a reflected light passes when an object is photographed by the stereo camera provided by the present invention. As shown in FIG. 3, it is assumed that two objects are emitted by the object 30 photographed by the stereo camera provided by the present invention. , namely: light 31 and light 41.

The first plane mirror 22 reflects the light 31 emitted by the photographing object 30 once, and the reflected light 32 is irradiated to the second plane mirror 23; the second plane mirror 23 reflects the first plane mirror 22 The light ray 32 is subjected to secondary reflection, and the reflected light 33 is irradiated to the optical imaging lens group 211 in the camera module 21;

The optical imaging lens group 211 focuses the light 33 reflected by the second plane mirror 23, and the focused light 34 is irradiated to the optical sensor 212 in the camera module 21;

The third plane mirror 24 reflects the light 41 emitted by the photographing object 30 once, and the reflected light 42 is irradiated to the fourth plane mirror 25; the fourth plane mirror 25 reflects the third plane mirror 24. The light ray 42 is subjected to secondary reflection, and the reflected light 43 is irradiated to the optical imaging lens group 211 in the camera module 21;

The optical imaging lens group 211 focuses the light 43 reflected by the second plane mirror 23, and the focused light 44 is irradiated to the optical sensor 212 in the camera module 21;

The optical sensor 212 converts the light 34 and the light 44 focused by the optical imaging lens group 211 in the sensitive camera module 21 into electrical signals.

In this way, the camera module 21 can obtain two images with parallax, and the electrical properties are completely identical.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are It should be included in the scope of protection of the present invention.

Claims

Claim

A stereo camera device, comprising: a camera module, a first plane mirror, a second plane mirror, a third plane mirror, and a fourth plane mirror;

The camera module includes: an optical imaging lens group, and an optical sensor;

a mirror surface of the first planar mirror parallel to a mirror surface of the second planar mirror; a mirror surface of the third planar mirror parallel to a mirror surface of the fourth planar mirror;

2. Apparatus according to claim 1 wherein:

The spacing between the center point of the first planar mirror and the center point of the third planar mirror is equal or similar to the spacing between the eyes of the person.

3. Apparatus according to claim 1 or 2, characterized in that

The first planar mirror and the third planar mirror are symmetrically disposed with respect to an optical axis of the optical imaging lens group; the second planar mirror and the fourth planar mirror are optically The optical axes of the imaging lens group are symmetrically arranged symmetrically.

The device according to claim 1 or 2, wherein the first planar mirror, the second planar mirror, the third planar mirror, and the fourth planar mirror have a rectangular or circular outer shape.

The apparatus according to claim 1 or 2, wherein the optical imaging lens group is a convex lens.

6. Apparatus according to claim 1 or 2, wherein the optical sensor is a charge coupled device (CCD) image sensor, or a complementary metal oxide semiconductor (CMOS) optical sensor.