CN208766403U

CN208766403U - 3D image acquisition device

Info

Publication number: CN208766403U
Application number: CN201821520430.6U
Authority: CN
Inventors: 范继良
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-09-17
Filing date: 2018-09-17
Publication date: 2019-04-19
Anticipated expiration: 2028-09-17

Abstract

The utility model provides a three-dimensional image acquisition device, including control processing apparatus, the camera lens, 1/4 wave plates, polarization beam splitter, the polaroid, dot matrix light-emitting component and image pickup device, the camera lens, the image pickup device, the center of polarization beam splitter and 1/4 wave plates is located same water flat line, polarization beam splitter sets up between camera lens and image pickup device, 1/4 wave plate sets up between polarization beam splitter and camera lens, dot matrix light-emitting component and polaroid set up in one side of polarization beam splitter, the light source of dot matrix light-emitting component shines on the measured object and reflects behind polaroid, polarization beam splitter and 1/4 wave plate, the reflected light of measured object is imaged on the image pickup device through the camera lens, control processing apparatus changes the distance between camera lens and the measured object, and controlling the opening and closing of the dot matrix luminous element to acquire images generated on the image pickup device under different distances in the opening and closing states of the dot matrix luminous element. The utility model discloses simple structure, the control processing apparatus handles the accurate three-dimensional image that forms of the formation of image picture of the different states of dot matrix light-emitting component, and it is effectual to form images.

Description

3-dimensional image acquisition device

Technical field

The utility model relates to a kind of imaging device more particularly to a kind of 3-dimensional image acquisition device.

Background technique

The mankind are the biologies with solid space sense organ, when eyes look at a measured object, are had between eyes angled Parallax, this parallax signals can be sent to brain, and in the visual processes district's groups synthesized image of brain, being formed has level and the depth of field Single image, and then make us class generate three-dimensional space three-dimensional sense, and with science and technology being showing improvement or progress day by day, 3-dimensional image is after height Development trend after clear image, existing 3-dimensional image acquisition device are usually to utilize different acquisition device at different angles Multiple images are shot, then are synthesized to obtain 3-dimensional image, or configure two independent camera lenses on the ontology of acquisition device, And average distance between being approximately equal to the mankind two is set by the distance between camera lens, the right and left eyes of simulated human are whereby to obtain three Image is tieed up, structure is complicated for above-mentioned 3-dimensional image acquisition device, and operation difficulty is big and expensive.

Therefore need a kind of at low cost, structure simple and the three-dimensional good 3-dimensional image acquisition device of measured object imaging effect.

Utility model content

The purpose of this utility model is to provide a kind of at low cost, structure, simple and three-dimensional measured object imaging effect is good 3-dimensional image acquisition device.

To achieve the goals above, the utility model provides a kind of 3-dimensional image acquisition device, including control processing unit, It camera lens, quarter wave plate, polarizing beam splitter, polarizing film, lattice luminous element and picks up as device, the camera lens is picked up as device, polarization point The center of light device and quarter wave plate is located in same horizontal line, and the polarizing beam splitter is set to the camera lens and picks up picture with described Between device, the quarter wave plate is set between the polarizing beam splitter and camera lens, and the lattice luminous element and polarizing film are set It is placed in the side of the polarizing beam splitter, the lattice luminous element issues light source, and the light source is successively through polarizing film, polarization point Be radiated on measured object and reflect after light device and quarter wave plate, the reflected light reflected through the measured object by the camera lens at As picking up in described as on device, it is mobile to change between the camera lens and measured object that the control processing unit controls the camera lens Distance f1, the control processing unit control the opening and closing of the lattice luminous element, and obtain the institute under the different distance f1 Lattice luminous element is stated to open or close under state in the image picked up as generating on device and processing.

Compared with prior art, the light source of the lattice luminous element of the utility model forms single wavelength after polarizing film Light is forming circularly polarized light by polarizing beam splitter and quarter wave plate, is being radiated on measured object and is more clear, so that at control The 3-dimensional image that device is capable of more accurate acquisition measured object is managed, after each light source point exposes to measured object in lattice luminous element Reflection, for the reflected light of measured object by lens imaging in picking up in picture device, control processing unit control camera lens is mobile and changes camera lens The opening and closing of the distance between measured object f1 and control point paroxysm optical element, to obtain the point paroxysm at different distance f1 Image when image and lattice luminous element when optical element is opened are closed, under lattice luminous element open state The image arrived is irradiation figure, and the image obtained under lattice luminous element closed state is Background, control processing dress After setting the irradiation figure and Background that receive n different distance f1, to irradiation figure and Background corresponding to each distance f1 It is handled to obtain the corresponding dot matrix irradiation figure of each distance f1, then is irradiated in figure by control processing unit from each dot matrix Find out distance f1 corresponding to the highest contrast of each light source point, then corresponding to the highest contrast by each light source point away from Depth map is formed from f1, three-dimensional data relevant to measured object can be obtained correspondingly to constitute 3-dimensional image, the utility model is straight It connected a camera lens and obtains 3-dimensional image, and synthesized three again without in different angle shooting measured object without using a plurality of lenses Image is tieed up, structure is simple, advantage of lower cost, and 3-dimensional image, 3-dimensional image generated can be precisely formed by depth map It is more nearly true measured object, imaging effect is good.

Preferably, the control processing unit includes control unit, processing unit and display unit, described control unit It controls the camera lens movement and the opening and closing of lattice luminous element, the processing unit obtains the image picked up as generating on device And handle, the display unit shows the image picked up as generating on device.

Preferably, the 3-dimensional image acquisition device of the utility model further includes the aperture for being same as adjusting luminous flux, the light Circle is set between the quarter wave plate and camera lens, and the center of the aperture and the center of camera lens are located in same horizontal line.

Preferably, the 3-dimensional image acquisition device meetsWherein f1 is the measured object and the mirror Distance between head, f2 are that the camera lens is picked up with described as the distance between device, and f is the focal length of the camera lens.

Preferably, the lattice luminous element includes lamp plate and several are evenly spaced in the LED light on the lamp plate.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the 3-dimensional image acquisition device of the utility model.

Fig. 2 is the structural schematic diagram of the lattice luminous element of the utility model.

Fig. 3 is the flow chart of the 3-dimensional image acquisition device of the utility model.

Specific embodiment

In order to have the understanding being more clear to the technical characteristics of the utility model, purpose and effect, it is detailed first to compare attached drawing Illustrate specific embodiment of the present utility model.

Referring to FIG. 1, the utility model provides a kind of 3-dimensional image acquisition device 100, including control processing unit 101, It camera lens 102, quarter wave plate 103, polarizing beam splitter 104, polarizing film 105, lattice luminous element 106 and picks up as device 107, specifically Ground, camera lens 102, quarter wave plate 103, polarizing beam splitter 104 and is picked up as the center of device 107 is located in same horizontal line, wherein partially Vibration optical splitter 104 is set to camera lens 102 and picks up as between device 107, quarter wave plate 103 is set to polarizing beam splitter 104 and camera lens Between 102, and lattice luminous element 106 and polarizing film 105 are set to the side of polarizing beam splitter 104；Polarizing beam splitter 104 is Common optical device, 104 English of polarizing beam splitter: polarization beam splitte, referred to as: PBS, polarization spectro Incident non-polarized light can be divided into the vertical line polarisation of two beams by device 104, and wherein P polarisation passes through completely, and S polarisation is with 45 degree of angles It is reflected, exit direction and P light are at an angle of 90 degrees, and polarization splitting prism is formed by a pair of of high-precision right-angle prism gluing, wherein one It is coated with polarization spectro deielectric-coating on the bevel edge of a prism, therefore the utility model is picked up as device 107 is located at polarizing beam splitter 104 P polarization direction, lattice luminous element 106 are located at the S polarization direction of polarizing beam splitter 104 so that pick up as device 107 with it is lattice luminous Element 106 is located at the adjacent two sides of polarizing beam splitter 104, that is, picks up as device 107 and the perpendicular setting of lattice luminous element 106； Polarizing film 105 is set between lattice luminous element 106 and polarizing beam splitter 104, and lattice luminous element 106 issues light when opening Source, the light source is successively radiated on measured object 10 after polarizing film 105, polarizing beam splitter 104 and quarter wave plate 103, described Light source is imaged in by camera lens 102 by the reflected light for reflecting, and reflecting through measured object 10 after being radiated on measured object 10 and picks up picture On device 107, control processing unit 101 can control camera lens 102 mobile to change the distance between camera lens 102 and measured object 10 f1, Also can control the open and close of lattice luminous element 106, and obtain the lattice luminous element 106 under different distance f1 open or The image as generating on device 107 is picked up under closed state and image is handled.

Specifically, control processing unit 101 is mobile so that the distance between camera lens 102 and measured object 10 are by camera lens 102 F1=f11, controls 101 opening point paroxysm optical element 106 of processing unit, the light source of lattice luminous element 106 through polarizing film 105, It is radiated on measured object 10 after polarizing beam splitter 104 and quarter wave plate 103, the reflected light of measured object 10 (measured object 10 herein Reflected light includes the light source of natural light and lattice luminous element 106) ten are imaged in as on devices 107 through camera lens 102, image at this time For irradiation figure, control processing unit 101 obtains irradiation figure and stores, and control processing unit 101 closes lattice luminous element 106, It is now in (i.e. measured object only under natural light) under natural conditions, the reflected light (reflection of measured object 10 herein of measured object 10 Light is natural light) ten are imaged in as on device 107, image is Background, the control acquisition back of processing unit 101 at this time through camera lens 102 Scape figure simultaneously stores, and irradiation figure is subtracted Background by control processing unit 101 reprocessing irradiation figure and Background, i.e., will irradiation Position and brightness are partially removed with completely the same in Background in figure, to obtain each light on lattice luminous element 106 The contrast image of source point, the image are dot matrix irradiation figure.Above step is repeated, the dot matrix obtained under multiple and different distance f1 shines Figure is penetrated, and dot matrix irradiation figure is stored to carry out subsequent processing.

Wherein, control processing unit 101 includes control unit 101a, processing unit 101b and display unit 101c, control The movement of unit 101a control camera lens 102 and the opening and closing of lattice luminous element 106 processed, processing unit 101b acquisition are picked up as device 107 The image of upper generation and processing are picked up as the image generated of device 107 is stored in processing unit 101b, and display unit 101c is shown The image as generating on device 107 is picked up, display unit 101c can also show that image obtains three after processing unit 101b processing Tie up image.

With continued reference to FIG. 1, in order to more accurately obtain 3-dimensional image, 3-dimensional image acquisition device 100 further includes being used for The aperture 108 of luminous flux is adjusted, aperture 108 is set between quarter wave plate 103 and camera lens 102 and the center of aperture 108 and camera lens 102 center is located in same horizontal line, and the horizontal line is consistent with the primary optical axis of camera lens 102.

With continued reference to FIG. 1,3-dimensional image acquisition device 100 meetsF1 is measured object 10 and camera lens 102 The distance between, f2 is camera lens 102 and picks up as the distance between device 107 that f is the focal length of camera lens 102, wherein camera lens 102 Focal length f it is known that camera lens 102 and pick up as the distance between device 107 f2 is fixed and numerical value it is known that according toCan acquire away from From f1.

Referring to FIG. 2, lattice luminous element 106 includes lamp plate 106a and several are evenly spaced on lamp plate 106a LED light 106b, each LED light 106b are then a light source point, issue institute jointly by all LED light 106b on lamp plate 106a Light source is stated, certainly, other common lattice luminous elements can be can be replaced into according to use demand.

According to physics of photography, when camera lens 102 is correctly focused, measured object 10 is incident upon ten as on device 107 through camera lens 102 The contrast of image be it is highest, wherein contrast refers to brightness difference or contrast, and when to focus on an object flat for light beam When face, the contrast of luminous point be also it is highest, i.e., on the certain point that light beam focuses on measured object 10 and camera lens 102 is again poly- simultaneously It is burnt in this regard when, pick up the contrast highest as the luminous point on device 107, can be by imaging in ten as every on device 107 The highest contrast that each light source point is radiated on measured object 10 is found in one irradiation figure, then finds institute according to highest contrast Corresponding focal length obtains the three-dimensional data of measured object, and the 3-dimensional image of measured object is obtained according to three-dimensional data, according to principles above And Fig. 1 and Fig. 3 is combined, specifically, the operating method that 3-dimensional image acquisition device 100 obtains 3-dimensional image is as follows, first to tested Object 10 is generally focused, and the distance between camera lens 102 and measured object 10 are f1=f1 ' at this time, and f1 ' is set as average coke Away from the basis of f1=f1 ', lattice luminous element 106 being closed, measured object 10 images in ten as in devices 107, image is base Quasi- image, control processing unit 101 obtain average focal length and benchmark image and store, and control processing unit 101 controls camera lens The distance between the 102 mobile camera lenses 102 made and measured object 10 f1=f11, wherein the mirror after control processing unit 101 controls The distance between first 102 and measured object 10 f1, which are smaller than average focal length, can also be greater than average focal length, in f1=f11, at control 101 opening point paroxysm optical element 106 of device is managed, the light source of lattice luminous element 106 is exposed on measured object 10 and reflected, and is tested Object 10 images in ten as (generating irradiation figure) on device 107 through camera lens 102, and the control acquisition of processing unit 101 images in ten as device 107 On irradiation figure and store；Control processing unit 101 closes lattice luminous element 106, and measured object 10 is imaged in through camera lens 102 again It picks up as (generating Background) on device 107, the control acquisition of processing unit 101 images in ten as the Background on device 107 and storage, then Irradiation figure is subtracted into Background and obtains the dot matrix irradiation figure at distance f11, at this point, control processing unit 101 stores the dot matrix Irradiation figure, dot matrix irradiate the image with each light source point on lattice luminous element 106 on figure, the dot matrix at distance f11 The light source point contrast irradiated on figure is different, repeats above step, and the n-1 dot matrix obtained under distance f1=f12 ... f1n shine Figure is penetrated, n dot matrix irradiation figures are compared again for control processing unit 101, find out a certain light source point of lattice luminous element 106 Contrast at which distance f1 is maximum, this distance f1 is the focal length of the light source point, finds the focal length of each light source point, often Focal length corresponding to one light source point collectively forms the depth map of measured object, and focal length corresponding to each light source point subtracts average coke again Away from the three-dimensional data of measured object is obtained, be adjusted according to the three-dimensional data of measured object and benchmark image can accurately obtain it is tested The 3-dimensional image of object.100 structure of 3-dimensional image acquisition device of the utility model is simple, directly using camera lens 102 via It controls the control of processing unit 101 and obtains 3-dimensional image, all images are handled by control processing unit 101, and are located The three-dimensional data of measured object 10 can be obtained after reason and can accurately obtain the 3-dimensional image of measured object 10 according to three-dimensional data.

Preferably, the 3-dimensional image acquisition device 100 of the utility model can be applied to the general three-dimensional data of reading face, read three Dimension stereo object makees 3D printing, identification plane and solid by object and auto-focusing projection arrangement (such as projector), but not It is limited to this.

The foregoing is merely the utility model institute preferred embodiments, and the right model of the utility model cannot be limited with this It encloses.In the conception range of the utility model, corresponding variation can be reasonably made.Therefore, the protection model of the utility model Claims should be subject to by enclosing.

Claims

1. a three-dimensional image acquisition device, is characterized in that, comprises control processing device, lens, 1/4 wave plate, polarizing beam splitter, polarizer, lattice light-emitting element and image pickup, described lens, image pickup, The centers of the polarization beam splitter and the 1/4 wave plate are located on the same horizontal line, the polarization beam splitter is arranged between the lens and the image pickup, and the 1/4 wave plate is arranged on the polarization beam splitter and Between the lenses, the lattice light-emitting element and the polarizer are arranged on one side of the polarizing beam splitter, the lattice light-emitting element emits a light source, and the light source is sequentially passed through the polarizer, the polarizing beam splitter and the 1/4 wave plate Then, it is irradiated on the measured object and reflected, and the reflected light reflected by the measured object is imaged on the camera through the lens, and the control processing device controls the movement of the lens to change the relationship between the lens and the measured object. The distance f1 between the measured objects, the control processing device controls the opening and closing of the dot matrix light-emitting element, and obtains the dot matrix light-emitting element under different distances f1 when the dot matrix light-emitting element is turned on or off in the image pickup generated image and processed.

2 . The three-dimensional image acquisition device according to claim 1 , wherein the control and processing device comprises a control unit, a processing unit and a display unit, and the control unit controls the movement of the lens and the opening and closing of the dot matrix light-emitting element. 3 . , the processing unit acquires and processes the image generated on the pickup, and the display unit displays the image generated on the pickup.

3 . The three-dimensional image acquisition device according to claim 1 , further comprising an aperture for adjusting the luminous flux, the aperture is arranged between the 1/4 wave plate and the lens, and the center of the aperture is 3 . on the same horizontal line as the center of the lens.

4. The 3D image acquisition device according to claim 1, wherein the 3D image acquisition device satisfies Wherein f1 is the distance between the measured object and the lens, f2 is the distance between the lens and the pickup, and f is the focal length of the lens.

5 . The three-dimensional image acquisition device according to claim 1 , wherein the dot matrix light-emitting element comprises a light board and a plurality of LED lights evenly arranged on the light board. 6 .