CN207946634U - Project module - Google Patents
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- CN207946634U CN207946634U CN201820454558.0U CN201820454558U CN207946634U CN 207946634 U CN207946634 U CN 207946634U CN 201820454558 U CN201820454558 U CN 201820454558U CN 207946634 U CN207946634 U CN 207946634U
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- capacitance electrode
- optical element
- diffraction optical
- protective glass
- utility
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Abstract
The utility model is related to a kind of projection modules, including：Light source (1)；Collimation unit (2) is located at the light source (1) side, for adjusting the light beam from the light source (1)；Diffraction optical element (3), for receiving the light beam after adjusting and being converted into patterned light beam；The both sides opposite in the diffraction optical element (3) are arranged with the collimation unit (2) in protective glass (4), the protective glass (4)；Detection unit (5), for detecting the diffraction optical element (3) and the protective glass (4).The projection module of the utility model can be detected itself, to judge to project whether module is in normal operating conditions, it is advantageously ensured that the accuracy and validity of the depth image being finally calculated using the projection module of the utility model.
Description
Technical field
The utility model is related to optical projection technical field more particularly to a kind of projection modules.
Background technology
Laser projection device is widely used in the fields such as the 3-D scanning of object, space three-dimensional reconstruction, human-computer interaction.Swash
Optical projection device is marked the spatial information of target object, by projection coding or the special light pattern of structuring after being
The information collection of phase image collecting device and three-dimensional reconstruction provide preparation.
In recent years, three dimensional depth application is gradually risen.With the rapid development of chip technology and intelligent algorithm, knot is utilized
Infrared LD (laser diode) or VCSEL (vertical cavity surface emitting laser) are sent out light to I-goal object by structure light microscopic head
Projection, projected light beam realize redistribution of the projected image in target object using diffraction optical element (DOE) afterwards, then with taking the photograph
It is received back as camera lens is projected onto the pattern on object, by certain algorithm process, you can it includes to be projected object to calculate
The 3-D view of depth information.3-D view with depth information can be further used for a variety of depth such as bio-identification and answer
With exploitation.Currently, the scheme of structure light gradually tends to be ripe, large-scale application has been in industrial 3D visual fields, and most
Nearly one or two years start to be applied to it is civilian in.
However the projector in the prior art, target object is being projected to by acquiring image, processing image acquisition target
During Object Depth image, the projector itself can not be often detected, this is allowed for using projector projection
It can not ensure whether projector is in normal operating conditions in the process, also allow for the depth image of the target object finally obtained
Precision or accuracy can not ensure.
Utility model content
Purpose of the utility model is to solve the above problems and provide a kind of projection modules with detection function.
For the above-mentioned purpose of utility model of realization, the utility model provides a kind of projection module, including：
Light source；
Collimation unit is located at the light source side, for adjusting the light beam from the light source；
Diffraction optical element, for receiving the light beam after adjusting and being converted into patterned light beam；
Protective glass, the protective glass and the collimation unit are arranged in the opposite both sides of the diffraction optical element；
Detection unit, for detecting the diffraction optical element and the protective glass.
One side according to the present utility model, the detection unit include the first capacitance electrode, the second capacitance electrode, the
Three capacitance electrodes and the 4th capacitance electrode.
One side according to the present utility model, the detection unit include the first detection components and the second detection components,
First detection components are for detecting the diffraction optical element, and second detection components are for detecting the protection glass
Glass.
One side according to the present utility model, first detection components include the first capacitance electrode and the second capacitance electricity
Pole, first capacitance electrode and second capacitance electrode are connect with the diffraction optical element.
One side according to the present utility model, second detection components include third capacitance electrode and the 4th capacitance electricity
Pole, the third capacitance electrode and the 4th capacitance electrode are connect with the protective glass.
One side according to the present utility model, the diffraction optical element include along far from the collimation unit direction
The glass substrate and optical grating construction being linked in sequence, the glass substrate side opposite with the optical grating construction is connected with are coated with
One transparent conductive film, first transparent conductive film are connect with first capacitance electrode, the second capacitance electrode.
One side according to the present utility model, the protective glass are coated with close to the side of the diffraction optical element
Two transparent conductive films, second transparent conductive film are connect with the third capacitance electrode and the 4th capacitance electrode.
One side according to the present utility model, the protective glass are infrared fileter.
One side according to the present utility model, the light source are vertical cavity surface emitting laser, edge emitter laser
Or LED.
The projection module of the utility model is equipped with detection unit, including the first capacitance electrode, the second capacitance electrode, third
Capacitance electrode and the 4th capacitance electrode, can be detected protective glass, can also be basic to the glass of diffraction optical element
It is detected with optical grating construction, you can examined with the protective glass and diffraction optical element of the projector to the utility model
Survey ensures that it is in normal operating conditions, so that it is determined that the graphics obtained that the projection module for passing through the utility model is final
The accuracy and validity of picture.
The projection module of the utility model is equipped with protective glass, and protective glass is for protecting diffraction optical element, keeping away
Exempt from the pollution diffraction optical element such as steam, dust in air, while can also avoid causing the outside of diffraction optical element from drawing
Wound.In a preferred embodiment, protective glass selects infrared fileter that can also be reduced while playing a protective role
The interference of its all band is conducive to the precision for improving the pattern light pattern finally projected.
Description of the drawings
Fig. 1 is the structure composition figure for schematically showing projection module according to the present utility model；
Fig. 2 is to schematically show to lead according to a kind of the first transparent conductive film of embodiment of the utility model and second are transparent
Electrolemma；
Fig. 3 is the light source diagram schematically shown according to a kind of embodiment of the utility model；
Fig. 4 is the light source diagram for schematically showing another embodiment according to the present utility model；
Fig. 5 is the projection diagram for schematically showing projection module according to the present utility model；
Fig. 6 schematically shows the detection diagram of projection module according to the present utility model.
It is as follows to represent meaning for each label in attached drawing：
1, light source.2, collimation unit.3, diffraction optical element.31, glass substrate.32, Grating Mechanism.It is 31a, first transparent
Conductive film.4, protective glass.41, the second transparent conductive film.5, detection unit.51, the first detection components.52, the second detection group
Part.51a, the first capacitance electrode.51b, the second capacitance electrode.52a, third capacitance electrode.52b, the 4th capacitance electrode.6, capacitance
Detector.
Specific implementation mode
It, below will be to implementing in order to illustrate more clearly of the utility model embodiment or technical solution in the prior art
Attached drawing needed in mode is briefly described.It should be evident that the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type for those of ordinary skills without creative efforts, can be with
Obtain other attached drawings according to these attached drawings.
When the embodiment for the utility model is described, term " longitudinal direction ", " transverse direction ", "upper", "lower",
"front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" "inner", the orientation or positional relationship expressed by "outside" are
Based on orientation or positional relationship shown in relevant drawings, it is merely for convenience of describing the present invention and simplifying the description, without
It is instruction or implies that signified device or element must have a particular orientation, with specific azimuth configuration and operation, therefore on
Term is stated to should not be understood as limiting the present invention.
The utility model is described in detail with reference to the accompanying drawings and detailed description, embodiment cannot herein one
One repeats, but therefore the embodiment of the utility model is not defined in following implementation.
Fig. 1 is the structure composition figure for schematically showing projection module according to the present utility model.As shown in Figure 1, this practicality
Novel projection module includes light source 1, collimation unit 2, diffraction optical element 3, protective glass 4 and detection unit 5.Such as Fig. 1 institutes
Show, in the present embodiment, the bottom in projection module is arranged in light source 1, for being provided for the projection module of the utility model
Light source.Collimation unit 2 is arranged in the top of light source 1, for collimating the light beam from light source unit 1.Diffraction optical element 3 is arranged
In the top of collimation unit 2, for receiving the light beam after the collimation of collimation unit 2 and being converted into patterned light beam,
In the present embodiment, pattern light pattern is converted to.Protective glass 4 and collimation unit 2 are separately positioned on diffraction optics member
The opposite both sides of part 3, as shown in Figure 1, in the present embodiment, collimation unit 2 is arranged in the lower section of diffraction optical element 3, protects
Shield glass 4 is arranged in the top of diffraction optical element 3.Detection unit 5 is connect with diffraction optical element 3 and protective glass 4 respectively,
Whether can be worked normally for detection of diffracted optical element 3 and protective glass 4.
As shown in Figure 1, the detection unit 5 of the utility model includes the first detection components 51 and the second detection components 52.The
Whether one detection components 51 are connect with diffraction optical element 3, can be worked normally for detection of diffracted optical element 3.Second inspection
It surveys component 52 to connect with protective glass 4, for detecting whether protective glass 4 can work normally.First inspection of the utility model
It includes the first capacitance electrode 51a, the second capacitance electrode 51b to survey component 51, and the second detection components 52 include third capacitance electrode 52a
With the 4th capacitance electrode 52b.It should be understood that the first capacitance electrode 51a of the utility model, the second capacitance electrode 51b, third are electric
The setting number for holding electrode 52a and the 4th capacitance electrode 52b does not have limitation, one or more can be arranged, specific root
It is configured according to actual needs.In the present embodiment, the first capacitance electrode 51a, the second capacitance electrode 51b, third capacitance electricity
Pole 52a and the 4th capacitance electrode 52b are disposed as one.
In the present embodiment, wherein the first capacitance electrode 51a and the second capacitance electrode 51b connects with diffraction optical element 3
It connects, third capacitance electrode 52a and the 4th capacitance electrode 52b are connect with protective glass 4.Be arranged such can by detect capacitance come
Whether the diffraction optical element 3 and protective glass 4 for determining the utility model can work normally, for example, grating can be detected
Whether integrality, detection grating fall off, if having phenomena such as condensation vapor, so that it is determined that by the utility model projector to mesh
The depth image that is calculated of pattern of mark project objects whether accurate and effective.
As shown in Figure 1, the diffraction optical element 3 of the utility model is arranged above collimation unit 2, including along far from accurate
The glass substrate 31 and optical grating construction 32 that straight unit 2 is linked in sequence.I.e. as shown in Figure 1, the glass substrate 31 of diffraction optical element 3
Above collimation unit 2, optical grating construction 32 is arranged on glass substrate 31.Diffraction optical element 3 can will pass through collimation
The light beam of unit 2 is converted into patterned light beam and is incident upon on target object, and in the present embodiment, diffraction optical element 3 can
It is copied into the beam pattern of certain array arrangement with the homogenizer for launching light source 1, is incident upon on target object.According to this
The projection module of utility model can set there are one diffraction optical element 3, can also be provided with multiple diffraction optical elements 3.
In the present embodiment, the first transparent conductive film 31a is coated on the glass substrate 31 of the utility model, first is transparent
Conductive film 31a is coated on side of the glass substrate 31 with respect to optical grating construction 32, i.e. optical grating construction 32 and the first transparent conductive film 31a
The both sides opposite positioned at glass substrate 31, the first transparent conductive film 31a is close to collimation unit 2.In the present embodiment, such as Fig. 1
It is shown, the first electrically conducting transparent of the first capacitance electrode 51a and the second capacitance electrode 51b and diffraction optical element 3 of detection unit 5
Film 31a electrical connections, realize the connection of detection unit 5 and diffraction optical element 3, and then can be examined to diffraction optical element 3
It surveys.
As shown in Figure 1, the protective glass 4 of the utility model is arranged above diffraction optical element 3, protective glass 4 is used for
Diffraction optical element 3 is protected, avoids steam, dust in air etc. from polluting diffraction optical element 3, while can also avoid causing
The external of diffraction optical element 3 scratches.Preferably, protective glass 4 selects infrared fileter, while playing a protective role,
The interference that its all band can also be reduced is conducive to the precision for improving the pattern light pattern finally projected.In this embodiment party
In formula, protective glass 4 is coated with the second transparent conductive film 41, the third capacitance of detection unit 5 close to the side of diffraction optical element 3
Electrode 52a and the 4th capacitance electrode 52b are electrically connected with the second transparent conductive film 41, realize the company of detection unit 5 and protective glass 4
It connects, and then protective glass 4 can be detected.
In the present embodiment, the first transparent conductive film 31a and the second transparent conductive film 41 are partly led by a kind of N-type oxide
Body-tin indium oxide (ITO) is made, and such material has resistance characteristic.Magnetron sputtering, physical vapor may be used in ito film
The methods of deposition is coated with.In addition, the first transparent conductive film 31a of the utility model and the second transparent conductive film 41 are identical
Patterning, as shown in Fig. 2, being class zebra line pattern in the present embodiment.Certainly, may be used also according to the actual needs
To be arranged to other patterns.
Fig. 3 is the light source diagram schematically shown according to a kind of embodiment of the utility model.As shown in figure 3, in this reality
It applies in mode, light source 1 emits light beam using vertical cavity surface emitting laser (VCSEL), vertical cavity surface emitting laser is small,
The angle of divergence is small, and power consumption is relatively low.The light beam of vertical cavity surface emitting laser transmitting needs collimated unit 2 to carry out shaping.Certainly, originally
The light source of utility model can also use edge emitter laser, LED light source etc., as shown in figure 4, in another embodiment
In, the light source 1 using monochromatic LED as the utility model.
In the present embodiment, collimation unit 2 is collimating mirror, and the number of collimation lens can be arranged according to the actual needs
Amount, the multiplying power of collimating mirror can determine the size of imagewise pattern.Light beam is projected after collimation on diffraction optical element 3, will
Beam replication after collimation is projected at by the speckle pattern of certain array arrangement on target object, and array can be arbitrary shape
Shape, Fig. 5 show a kind of pattern light pattern of embodiment.
The operating method projected to target object using the projection module of the utility model is as follows：
S1. whether detection protective glass 4 can work normally；
S2. whether detection of diffracted optical element 3 can work normally；
S3. start light source 1, the collimated unit 2 of the hot spot that light source 1 is sent out projects after adjusting on diffraction optical element 3；
S4. projection light is copied on pattern projection to target object by diffraction optical element 3.It is carried out below in conjunction with Fig. 6 detailed
Describe in detail it is bright, Fig. 6 be schematically show it is according to the present utility model projection module detection diagram.
As shown in fig. 6, in step sl, due to third capacitance electrode 52a and the 4th capacitance electrode 52b and protective glass 4
On the electrical connection of the second transparent conductive film 41, third capacitance electrode 52a and the 4th capacitance electrode 52b can be used as conductive electrode to examine
Survey the resistance of the second transparent conductive film 41.Because the second transparent conductive film 41 is coated on protective glass 4, if protective glass 4 goes out
Now rupture can cause the second transparent conductive film 41 to be damaged, and then can influence the size of resistance value, so passing through third capacitance
Whether the resistance variations that electrode 52a and the 4th capacitance electrode 52b detects the second transparent conductive film 41 may determine that protective glass 4
Rupture event has occurred.
As shown in fig. 6, in step s 2, whether detection of diffracted optical element 3 can work normally including detection of diffracted light
Whether whether the glass substrate 31 of element 3 can work normally can be just with the optical grating construction of detection of diffracted optical element 3 32
Often work.Specifically, since the first capacitance electrode 51a and the second capacitance electrode 51b and first on glass substrate 31 are transparent
Conductive film 31a electrical connections, the first capacitance electrode 51a and the second capacitance electrode 51b can be used as conductive electrode detection first transparent
The resistance of conductive film 31a.In addition, the pole of the first capacitance electrode 51a and the second capacitance electrode 51b as capacitance electrode, third
Another pole of capacitance electrode 52a and the 4th capacitance electrode 52b as capacitance electrode can detect capacitance by capacitance probe 6
The variation of value may determine that whether optical grating construction 32 occurs falling off or extensive damage, whether deposit according to the variation of capacitance
In condensation vapor, dust etc..
Pass through detection, it is ensured that project the protective glass 4 of module and after diffraction optical element 3 can work normally, open
Light source 1, the collimated unit 2 of hot spot that light source 1 is sent out project after adjusting on diffraction optical element 3, and diffraction optical element 3 will be thrown
It penetrates recovery to be made on pattern projection to target object, characterizes the feature of target object.Hereafter it may be used that camera lens will be first-class to spread out
It penetrates the pattern that optical element 3 projects on target object to be acquired, target object then can be obtained by settlement process
Depth image.
The projection module of the utility model is provided with detection unit 5, including the first detection components 51 and the second detection components
52, and be electrically connected respectively with diffraction optical element 3 and protective glass 4, it can be used for diffraction optical element 3 and protective glass 4
It is detected, judges whether diffraction optical element 3 and protective glass 4 can work normally, so that it is determined that new by this practicality
The accuracy and validity of the final 3-D view obtained of the projection module of type.
The foregoing is merely a schemes of the utility model, are not intended to limit the utility model, for ability
For the technical staff in domain, various modifications and changes may be made to the present invention.It is all the spirit and principles of the utility model it
Interior, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (8)
1. a kind of projection module, which is characterized in that including：
Light source (1)；
Collimation unit (2) is located at the light source (1) side, for adjusting the light beam from the light source (1)；
Diffraction optical element (3), for receiving the light beam after adjusting and being converted into patterned light beam；
Protective glass (4), the protective glass (4) are arranged opposite in the diffraction optical element (3) with the collimation unit (2)
Both sides；
Detection unit (5), for detecting the diffraction optical element (3) and the protective glass (4).
2. projection module according to claim 1, which is characterized in that the detection unit (5) includes the first detection components
(51) and the second detection components (52), first detection components (51) are for detecting the diffraction optical element (3), and described the
Two detection components (52) are for detecting the protective glass (4).
3. projection module according to claim 2, which is characterized in that first detection components (51) include the first capacitance
Electrode (51a) and the second capacitance electrode (51b), first capacitance electrode (51a) and second capacitance electrode (51b) and institute
State diffraction optical element (3) connection.
4. projection module according to claim 2, which is characterized in that second detection components (52) include third capacitance
Electrode (52a) and the 4th capacitance electrode (52b), the third capacitance electrode (52a) and the 4th capacitance electrode (52b) and the guarantor
Glass (4) is protected to connect.
5. projection module according to claim 3, which is characterized in that the diffraction optical element (3) includes along separate
The glass substrate (31) and optical grating construction (32) that collimation unit (2) direction is linked in sequence, the glass substrate (31) and company
It is connected to the opposite side of the optical grating construction (32) and is coated with the first transparent conductive film (31a), first transparent conductive film (31a)
It is connect with first capacitance electrode (51a), the second capacitance electrode (51b).
6. projection module according to claim 4, which is characterized in that the protective glass (4) is close to the diffraction optics
The side of element (3) is coated with the second transparent conductive film (41), second transparent conductive film (41) and the third capacitance electrode
(52a) and the 4th capacitance electrode (52b) connect.
7. projection module according to claim 1, which is characterized in that the protective glass (4) is infrared fileter.
8. projection module according to claim 1, which is characterized in that the light source (1) be vertical cavity surface emitting laser,
Edge emitter laser or LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820454558.0U CN207946634U (en) | 2018-04-02 | 2018-04-02 | Project module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820454558.0U CN207946634U (en) | 2018-04-02 | 2018-04-02 | Project module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207946634U true CN207946634U (en) | 2018-10-09 |
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ID=63698672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820454558.0U Active CN207946634U (en) | 2018-04-02 | 2018-04-02 | Project module |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207946634U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594562A (en) * | 2018-04-02 | 2018-09-28 | 浙江舜宇光学有限公司 | Project module and projecting method |
-
2018
- 2018-04-02 CN CN201820454558.0U patent/CN207946634U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108594562A (en) * | 2018-04-02 | 2018-09-28 | 浙江舜宇光学有限公司 | Project module and projecting method |
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