TWI464525B - Stereo lens module - Google Patents

Description

Stereo imaging lens module

The invention relates to a stereoscopic imaging lens module.

With the development of multimedia technology, digital cameras and camcorders are increasingly favored by consumers. While people are pursuing miniaturization of digital cameras and camcorders, they are placing higher demands on the image quality of their photographed objects. It is limited to viewing two-dimensional effects, and it is desirable to be able to view objects at multiple angles at the same time, that is, to see stereoscopic images of objects, and at the same time, as mobile phones are increasingly popular with consumers, mobile phones are portable, lightweight, and portable. For the sake of this, people hope that mobile phones can take stereoscopic images of the scene at any time.

The existing stereoscopic imaging system separately captures a subject from different angles by two cameras to obtain two two-dimensional images. The two cameras are usually relatively fixed. When the two two-dimensional images of the subject are recombined, the two-dimensional images are combined into a volume image by the positional relationship of the two cameras. However, the stereoscopic imaging system requires two camera bodies including a lens group and a sensing element, which are high in cost, bulky, and inconvenient to carry.

In view of this, it is necessary to provide a stereoscopic imaging lens module that is low in cost, small in size, and easy to carry.

A stereoscopic imaging lens module for imaging a stereoscopic image of a subject, the stereoscopic imaging lens module comprising: a point source scanning device comprising a point light source and a two-dimensional scanning device, wherein the light emitted by the point source is The subject is driven by the two-dimensional scanning device to scan the object in a matrix; the image sensing module is configured to receive the light reflected by the object and imaged; And configured to receive the image data input by the image sensing module and perform Fourier transform on the image data to extract depth information of the object.

Compared with the prior art, the stereoscopic imaging lens module of the embodiment of the present invention needs an image sensing module and a point source scanning device, and uses a point source matrix to scan the object and the light projected onto the object pair. Spatial modulation is generated, the angle of the imaging beam is changed, and spatial information is proposed by Fourier transform to extract depth information of the object. Therefore, the stereo imaging lens module is low in cost, small in size, and convenient to carry.

10, 20‧‧‧ Stereo imaging lens module

11, 21‧‧‧ point light source scanning device

12, 22‧‧‧ image sensing module

13, 23‧‧‧ Data Processing Unit

111, 211‧‧ ‧ point light source

112, 212‧‧ ‧ collimating lens

113‧‧‧Two-dimensional drive

100‧‧‧Received objects

1131, 213‧‧ ‧ motor

1132‧‧‧Flat mirror

121, 221‧‧‧ image sensing unit

122, 222‧‧‧ lens module

214‧‧‧Micro Mirror Element Array

1 is a schematic view of a stereoscopic imaging lens module according to a first embodiment of the present invention.

2 is a schematic view of a stereoscopic imaging lens module according to a second embodiment of the present invention.

The invention will now be described in further detail with reference to the accompanying drawings.

Referring to FIG. 1 , a stereoscopic imaging lens module 10 according to a first embodiment of the present invention includes a point source scanning device 11 , an image sensing module 12 , and a data processing unit 13 .

The point light source scanning device 11 includes a point light source 111, a collimator lens 112, and a two-dimensional driving device 113. The light emitted from the point light source 111 passes through the collimator lens 112 and is scanned by the two-dimensional driving device 113 to scan the object 100 in a matrix.

The two-dimensional driving device 113 includes a motor 1131 and a plane mirror 1132 that can drive the plane mirror 1132 to rotate at an arbitrary angle. The point light source 111 may be an infrared point light source, and the light L1 emitted by the light beam L1 is projected onto the plane mirror 1132 through the light beam L2 after the collimator lens 112, and the light beam L2 is projected onto the object 100 by the reflected light beam L3.

The shape of the light ray L3 may be a shape including a length, a width, or the like, such as a circle, a rectangle, a square, or a circle containing a cross. In this embodiment, a circle having a cross is taken as an example, and the cross reflects the width in the horizontal and vertical directions.

The plane mirror 1132 is rotated by the motor 1131 to project the light L3 to different positions of the object 100, which are arranged in a matrix.

The image sensing module 12 includes an image sensing unit 121 and a lens module 122, and is projected to be photographed. The light L3 of the object 100 is reflected by the lens 100 and then imaged on the image sensing unit 121. The image sensing unit 121 is a CCD sensor or a CMOS sensor.

The data processing unit 13 receives the image data of the image sensing module 12 and performs Fourier transform on the image data. Since the object 100 spatially modulates the light L3 projected thereon, the shape of the cross strip of the light ray L3 is changed, and the spatial information of the position of the object 100 corresponding to the light ray L3, such as the height and the width, can be extracted by Fourier transform. Or in-depth information.

The spatial information of the object 100 can be obtained by integrating the information of each position in the matrix arrangement.

As shown in FIG. 2, the stereoscopic imaging lens module 20 of the second embodiment of the present invention includes a point source scanning device 21, an image sensing module 22, and a data processing unit 23.

The point source scanning device 21 includes a motor 213, a point source 211, a collimating lens 212, and a micromirror element array 214. The point light source 211 is the same as the point source 111 of the first embodiment, and the micromirror element array 214 may be a Digital Micromirror Device (DMD).

The motor 213 can drive the point light source 211 to rotate at an arbitrary angle, and the light L1' emitted by the point source 211 passes through the collimating lens 212 and is incident on the different micromirror elements of the micromirror element array 214, and is reflected by the micromirror element array 214. The subsequent light rays L3' are projected to different positions of the object 100, and the different positions are arranged in a matrix.

The light L3' projected onto the object 100 is reflected by the lens module 222 of the image sensing module 22 and then imaged on the image sensing unit 221.

As in the first embodiment, since the object 100 spatially modulates the light L3' projected thereon, the shape of the cross strip of the light L3' is changed, and the corresponding light L3 of the object 100 can be extracted by Fourier transform. Spatial information such as height, width or depth information.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧Three-dimensional imaging lens module

11‧‧‧ point source scanning device

12‧‧‧Image Sensing Module

13‧‧‧Data Processing Unit

111‧‧‧ point light source

112‧‧‧ Collimating lens

113‧‧‧Two-dimensional drive

100‧‧‧Received objects

1131‧‧‧Motor

1132‧‧‧Flat mirror

121‧‧‧Image sensing unit

122‧‧‧Lens module

Claims (7)

A stereoscopic imaging lens module for imaging a stereoscopic image of a subject, wherein: the stereoscopic imaging lens module comprises: a point source scanning device, comprising a point source and a two-dimensional scanning device, wherein the point source emits The light forms a predetermined pattern, and the subject is scanned in a matrix under the driving of the two-dimensional scanning device; the image sensing module is configured to receive the light reflected by the object and image; data processing The unit is configured to receive image data input by the image sensing module and perform Fourier transform on the image data to extract depth information of the object. The stereoscopic imaging lens module of claim 1, wherein the point source is an infrared point source. The stereoscopic imaging lens module of claim 2, wherein: the two-dimensional scanning device comprises a motor and a plane mirror, the motor drives the plane mirror to rotate, and the infrared ray emitted by the infrared point source is used by the plane mirror A reflection is projected onto the subject. The stereoscopic imaging lens module of claim 2, wherein: the two-dimensional scanning device comprises an array of motors and micromirror elements, and the motor drives infrared rays emitted from the infrared point source to the micromirrors On the different micromirror elements of the array of elements, the infrared rays are reflected by the micromirror elements and projected onto the subject. The stereoscopic imaging lens module of any one of claims 1 to 4, wherein the image sensing module comprises an image sensing unit and a lens module. Infrared light reflected by the subject is imaged on the image sensing unit through the lens module. The stereoscopic imaging lens module of claim 5, wherein the image sensing unit is a CCD sensor or a CMOS sensor. The stereoscopic imaging lens module of claim 6, wherein the predetermined pattern is a circle, a rectangle, a square, or a circle containing a cross.