CN209690701U - A kind of optical projection mould group, sensing device and equipment - Google Patents
A kind of optical projection mould group, sensing device and equipment Download PDFInfo
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- CN209690701U CN209690701U CN201821905928.4U CN201821905928U CN209690701U CN 209690701 U CN209690701 U CN 209690701U CN 201821905928 U CN201821905928 U CN 201821905928U CN 209690701 U CN209690701 U CN 209690701U
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- mould group
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Abstract
The utility model provides a kind of optical projection mould group, and three-dimensional sense survey is carried out on preset sensing spot pattern to measured target object for projecting.The optical projection mould group includes light source, beam splitter and beam modulation element.The light source issues one group of sensing light beam with default optical field distribution.One group of sensing light beam is divided into the beamlet identical with sensing light beam of light field arrangement inside at least two groups and projected on beam modulation element along different directions respectively by the beam splitter.The beam modulation element, which corresponds to each group of beamlet and is respectively formed a sensing spot pattern, to be projected on measured target object.Sensing spot pattern corresponding to difference group beamlet is mutually the same but there is preset positional shift between each other.The utility model also provides a kind of sensing device and equipment.
Description
Technical field
The utility model belongs to optical technical field more particularly to a kind of optical projection mould group, sensing device and equipment.
Background technique
Existing three-dimensional (Three Dimensional, 3D) sensing mould group is preset by projecting on measured target object
Spot pattern carries out three-dimensional sensing.The spot densities cast out are higher, then can sense on the measured target object come
Three-dimensional information it is more comprehensive.Improving projected spot densities most straightforward approach is to increase the quantity of luminous point on light source,
However the quantity for increasing luminous point on light source can be limited by manufacture craft, in addition can also increase the cost of manufacture of light source therewith.
Utility model content
The technical problem to be solved by the utility model is to provide a kind of optical projection mould group, sensing device and equipment,
Duplication spot densities can be increased on the basis of not increasing the luminous point quantity of light source, reach the precision for improving three-dimensional sensing
Beneficial effect.
The utility model embodiment provides a kind of optical projection mould group, for projecting preset sensing spot pattern extremely
Three-dimensional sense survey is carried out on measured target object.The optical projection mould group includes light source, beam splitter and beam modulation element.It is described
Light source issues one group of sensing light beam with default optical field distribution.One group of sensing light beam is divided at least two groups by the beam splitter
The beamlet on beam modulation element is projected along different directions respectively.The beam modulation element corresponds to each group of beamlet point
Not Xing Cheng a sensing spot pattern be projected on measured target object.Sensing spot pattern corresponding to difference group beamlet is each other
It is identical but there is preset positional shift between each other.
In some embodiments, the sensing spot pattern is by the beam modulation element by the illuminator hot spot of light source
Pattern combines to be formed according to predetermined period after replicating more parts.
In some embodiments, if the positional shift is within the period of single illuminator spot pattern, the position
It deviates and is greater than or equal to 0.4 of adjacent spots center spacing average value in spot pattern along the minimum offset that any direction decomposes
Times.
In some embodiments, if the single week for being shifted out the illuminator spot pattern of the spot pattern
Phase location, then the positional shift is subtracting single illuminator spot pattern week along the minimum offset that any direction decomposes
Still meet after the product for the number of cycles that phase, size was exceeded with positional shift in the direction more than or equal to phase in spot pattern
0.4 times of adjacent spot center spacing average value.
In some embodiments, the beam splitter be selected from one of prism, grating, binary Fresnel Lenses and its
Combination.
In some embodiments, the hot spot duty cycle range of the spot pattern after offset overlapping is more than or equal to single light
1.3 times of the hot spot duty ratio of spot pattern and be less than or equal to 2 times of the hot spot duty ratio of single spot pattern.
In some embodiments, the light source includes semiconductor base and is formed in luminous on the semiconductor base
Body, the illuminator are vertical cavity surface emitting laser.
In some embodiments, the arrangement mode of the illuminator on a semiconductor substrate is selected from irregular arrangement, rule
It then arranges, periodic arrangement or for the wide face type vertical cavity surface emitting laser of single hole.
The utility model embodiment provides a kind of sensing device, is used to sense the three-dimensional information of measured target object,
Including sensing mould group and the optical projection mould group as described in above-mentioned any one embodiment.The sensing mould group is described for sensing
The predetermined pattern and the image by analyzing the predetermined pattern that optical projection mould group projects on measured target object obtain tested
The three-dimensional information of subject matter.
The utility model embodiment provides a kind of equipment, including sensing device described in above embodiment.It is described to set
The three-dimensional information of the standby measured target object sensed according to the sensing device executes corresponding function.
Beam modulation element provided by the utility model embodiment, optical projection mould group, sensing device and equipment are adopted
The same spot pattern for going out multiple mutual positional shifts with different groups of optical modulation arrangement projects can increase the close of sensing hot spot
Degree improves the precision of three-dimensional sensing.
The additional aspect and advantage of the utility model embodiment will be set forth in part in the description, partially will be under
Become obvious in the description in face, or is recognized by the practice of the utility model embodiment.
Detailed description of the invention
Fig. 1 is the structural schematic diagram for the optical projection mould group that the utility model first embodiment provides.
Fig. 2 is the structural representation for the first spot pattern being correspondingly formed by the first beamlet through beam modulation element in Fig. 1
Figure.
Fig. 3 is the structural schematic diagram that the first spot pattern and the second spot pattern of overlapping are offset from each other in Fig. 1.
Fig. 4 is the functional block diagram for the sensing device that the utility model second embodiment provides.
Fig. 5 is the structural schematic diagram for the sensing device that the utility model second embodiment provides.
Fig. 6 is the structural schematic diagram for the equipment that the utility model third embodiment provides.
Specific embodiment
The embodiments of the present invention is described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein
Same or similar label indicates same or similar element or element with the same or similar functions from beginning to end.Lead to below
It crosses the embodiment being described with reference to the drawings to be exemplary, is only used for explaining the utility model, and should not be understood as practical to this
Novel limitation.In the description of the present invention, it should be understood that term " first ", " second " are only used for describing, without
It can be interpreted as indication or suggestion relative importance or implicitly indicate the quantity of indicated technical characteristic or put in order.By
This defines " first ", the technical characteristic of " second " can explicitly or implicitly include one or more technology
Feature.The meaning of " plurality " is two or more in the description of the present invention, unless otherwise clearly specific limit
It is fixed.
In the description of the present invention, it should be noted that unless otherwise specific regulation or limiting, term " peace
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integration
Connection；It can be mechanical connection, be also possible to be electrically connected or be in communication with each other；It can be directly connected, intermediate matchmaker can also be passed through
Jie is indirectly connected, and can be the connection inside two elements or the interaction relationship between two elements.For this field
For those of ordinary skill, the concrete meaning of above-mentioned term in the present invention can be understood as the case may be.
Following disclosure provides many different embodiments or example is used to realize the different structure of the utility model.
In order to simplify the disclosure of the utility model, hereafter only to the component of specific examples and being set for describing.Certainly, they are only
Example, and purpose does not lie in limitation the utility model.In addition, the utility model can reuse reference in different examples
Number and/or reference letter, this reuse are to simplify and clearly state the utility model, itself does not indicate institute
The particular kind of relationship between various embodiments and/or setting discussed.In addition, the utility model is provided in the following description
Various specific techniques and material are only the example for realizing technical solutions of the utility model, but those of ordinary skill in the art answer
This recognizes that the technical solution of the utility model can also be by other techniques for not describing hereafter and/or other materials come real
It is existing.
Further, described feature, structure can be incorporated in one or more embodiment party in any suitable manner
In formula.In the following description, many details are provided so as to fully understand the embodiments of the present invention.So
And one of ordinary skill in the art would recognize that, even if without one or more in the specific detail, or using other knots
Structure, constituent element etc. can also practice the technical solution of the utility model.In other cases, it is not shown in detail or describes known knot
Structure or operation to avoid fuzzy the utility model emphasis.
It should be understood that embodiments described herein and/or method are exemplary in itself, it is not construed as pair
The limitation of technical solutions of the utility model.Embodiment or method described herein are only the utility model the relevant technologies thought
One of numerous technical solutions covered are a variety of, therefore each step of described method and technology scheme can be according to
The order indicated executes, and can execute, may be performed simultaneously, or be omitted in some cases according to other order, on
The change stated is regarded as the range that the utility model technical solution claimed is covered.
Also referring to Fig. 1, Fig. 2 and Fig. 3, the utility model first embodiment provides a kind of optical projection mould group 1,
Three-dimensional sense survey is carried out on preset sensing spot pattern 11 to measured target object for projecting.The optical projection mould group 1 is wrapped
Include beam modulation element 10, beam splitter 11 and light source 12.
The light source 12 issues one group of sensing light beam 13 with default optical field distribution.The sensing light beam 13 is according to sense
It surveys principle and application scenarios can be the light beam with specific wavelength.In the present embodiment, the sensing light beam 13 is for feeling
The three-dimensional information of measured target object is surveyed, can be infrared or near-infrared wavelength light beam, wave-length coverage is 750 nanometers
(Nanometer, nm) is to 1650nm.
The light source 12 includes semiconductor base 120 and the illuminator 122 being formed on the semiconductor base 120.Institute
Stating illuminator 122 can be semiconductor laser.Preferably, in the present embodiment, the illuminator 122 is vertical cavity surface hair
Laser (Vertical Cavity Surface Emitting Laser, VCSEL) is penetrated, on the semiconductor base 120
It is made up of the techniques such as photoetching and etching.The quantity of the illuminator 122 can be one or more.The illuminator 122 exists
It for irregular arrangement, regular array, periodic arrangement or can be the wide face type VCSEL of single hole on semiconductor base 120, herein
With no restrictions.Because the sensing light beam 13 is directly issued by the illuminator 122 of light source 12, then the sensing light beam 13 is formed by
Pattern is the illuminator spot pattern consistent with the arrangement of 12 illuminator 122 of light source.
The beam splitter 11 divides one group of sensing light beam 13 at least two groups beamlet 130,132.Every group of beamlet 130
Or 132 inside light field arrangement is identical as the sensing inside light field arrangement of light beam 13.The beamlet 130 of the different groups,
132, which are respectively facing different directions, is projected.The beam splitter 11 can be prism, grating, binary Fresnel Lenses
Deng.In the present embodiment, the beam splitter 11 is prism.The projecting direction of each group of beamlet 130 or 132 can
Parameter by changing beam splitter 11 is adjusted.The projecting direction of each group of beamlet 130 or 132 is it is ensured that can
Cover the whole effective working region of the beam modulation element 10.
The beam modulation element 10 includes optical substrate 100 and the optical modulation structure being formed in optical substrate 100
102.The correspondence of beam modulation element 10 combines shape after each group of beamlet 130 or 132 is replicated more parts according to preset rules
Measured target object is incident upon at the sensing spot pattern 11 for three-dimensional sensing.In the present embodiment, the sensing hot spot
Pattern 11 can be the illuminator spot pattern 1101 of the light source 12 is replicated more parts after according to predetermined period combine arrangement and
At.The optical modulation structure 102 can be that diffractive optical structure, optical micro lens array, optical grating construction etc. can be to light beams
The optical texture of duplication expansion is carried out, herein with no restrictions.Accordingly, the beam modulation element 10 is selected from diffraction optical element
One of (Diffractive Optical Element, DOE), optical microlens group, grating and combinations thereof.
Because the angle that different groups of beamlets 130,132 are injected on light beam adjustment element 10 is different, spread out according to optics
Penetrate principle, difference group beamlets 130,132 by the sensing spot pattern 11 being correspondingly formed after beam modulation element 10 it is mutual it
Between can have positional shift S.Incident angle between the positional shift S and corresponding different groups of beamlets 130,132 is related.In
In present embodiment, the beam splitter 10 divides the sensing light beam 13 that light source 12 issues for the first beamlet 130 and the second son
Light beam 132.First beamlet 130 forms corresponding first sensing spot pattern 110 by beam modulation element 10.It is described
The duplicate for the illuminator spot pattern 1101 that first sensing spot pattern 110 repeats arrangement by multiple periods forms.Described second
Beamlet 132 forms corresponding second sensing spot pattern 112 by beam modulation element 10.The second sensing spot pattern
112 is identical as the first sensing spot pattern 110, but the second sensing spot pattern 112 is relative to the first sensing spot pattern
110 there are preset positional shift S.The first sensing spot pattern 110 and the second sensing spot pattern 112 are plan view
Shape, so mutual positional shift S can be decomposed into the first offset H and Y in a second direction along first direction X
Second offset P, the first direction X is perpendicular to second direction Y.In the present embodiment, the first direction X is level side
To the second direction Y is vertical direction.
If the positional shift S, within the period of single illuminator spot pattern 1101, the positional shift S is along any
The minimum offset of Directional Decomposition is greater than or equal to adjacent spots center spacing average value in the first sensing spot pattern 110
0.4 times, the smaller value in the as described first offset H and the second offset P should be greater than or be equal to phase in the present embodiment
0.4 times of adjacent spot center spacing average value.Because the hot spot cast out all has certain halation range, so may make
Hot spot between the sensing spot pattern 11 offset from each other is not overlapped as far as possible.
Partly overlapping first sensing spot pattern 110 and second senses composed by spot pattern 112 completely after offset
The density of hot spot described in pattern is improved.If the hot spot duty ratio of the single sense spot pattern 11 is T0, deviate
After overlapping it is described first sensing spot pattern 110 with second sense spot pattern 112 composed by complete pattern hot spot duty
T0 than TN more than or equal to 1.3 times and be less than or equal to twice of T0.
It is understood that if the sensing spot pattern 11 has been shifted out an illuminator spot pattern 1101
Period where range, then the positional shift S is subtracting single illuminator light along the minimum offset that any direction decomposes
It is applicable in after the integral multiple for the correspondence periodicity of the size of spot pattern 1101 in the direction exceeded above-mentioned to sensing spot pattern
The requirement of spot densities after 11 minimum offset and overlapping.
It is understood that in other embodiments, the sensing light beam of light source can also be divided by the beam splitter
Different beamlet more than two is to be correspondingly formed more than two sensing spot patterns offset from each other by beam modulation element
11。
As shown in Figure 1 and Figure 4, the utility model second embodiment provides a kind of sensing device 4, is used to sense quilt
Survey the three-dimensional information of object.The spatial information of the measured target object sensed can be used for identifying measured target object or building
The threedimensional model of measured target object.
The sensing device 4 includes the optical projection mould group 1 as provided by above-mentioned first embodiment and sensing mould group 2.
The optical projection mould group 1 is for projecting preset sensing spot pattern 11 to measured target object.The sensing mould group 2 includes
Camera lens 21, imaging sensor 22 and image analysis processor 23.Described image sensor 22 by camera lens 21 sensing project by
Survey the sensing spot pattern 11 on object.The analysis of described image analysis processor 23 senses sensing spot pattern 11
Obtain the three-dimensional information of measured target object.
In the present embodiment, as shown in figure 5, the sensing device 4 is the three-dimensional information for sensing measured target object surface
And the 3D face authentification device of measured target object identity is identified accordingly.
The default spot pattern that the sensing mould group 4 projects on measured target object according to the spot pattern sensed
Change in shape come analyze measured target object surface three-dimensional information and accordingly to measured target object carry out face recognition.
As shown in fig. 6, the utility model third embodiment provides a kind of equipment 5, for example, it is mobile phone, laptop, flat
Plate computer, touch-control interaction screen, door, the vehicles, robot, automatic numerical control lathe etc..The equipment 5 includes that at least one is above-mentioned
Sensing device 4 provided by second embodiment.The equipment 5 according to the sensing result of the sensing device 4 to correspond to for holding
The corresponding function of row.The corresponding function includes but is not limited to unlock after identifying user's identity, pay, start preset application
Judged in the mood and health condition of user after program, avoidance, identification user's countenance using depth learning technology
Any one or more.
In the present embodiment, the sensing device 4 is to sense the three-dimensional information on measured target object surface and identify accordingly
The three-dimensional face authentification device of measured target object identity.The equipment 5 is mobile phone, pen equipped with the three-dimensional face authentification device
Remember the electric terminals such as this computer, tablet computer, touch-control interaction screen, or is door, the vehicles, safety check instrument, entry and exit gate
Etc. be related to pass in and out permission equipment 5.
Compared with prior art, beam modulation element 12 provided by the utility model, optical projection mould group 1, sensing dress
Set 4 and equipment 5 using different groups of optical modulation arrangement projects go out the same spot patterns of multiple mutual positional shifts, can increase
The density of hot spot is sensed, the precision of three-dimensional sensing is improved.
In the description of this specification, reference term " embodiment ", " certain embodiments ", " schematically implementation
What the description of mode ", " example ", " specific example " or " some examples " etc. meant to describe in conjunction with the embodiment or example
Particular features, structures, materials, or characteristics are contained at least one embodiment or example of the utility model.In this explanation
In book, schematic expression of the above terms are not necessarily referring to identical embodiment or example.Moreover, the specific spy of description
Sign, structure, material or feature can be combined in any suitable manner in any one or more embodiments or example.
The foregoing is merely the better embodiments of the utility model, are not intended to limit the utility model, it is all
It is practical new to should be included in this for made any modifications, equivalent replacements, and improvements etc. within the spirit and principles of the utility model
Within the protection scope of type.
Claims (10)
1. a kind of optical projection mould group, which is characterized in that for projecting preset sensing spot pattern to measured target object
Three-dimensional sensing is carried out, the optical projection mould group includes light source, beam splitter and beam modulation element, and the light source sending has
One group of sensing light beam is divided at least two groups respectively along not Tongfang by one group of sensing light beam of default optical field distribution, the beam splitter
To the beamlet projected on beam modulation element, the beam modulation element corresponds to each group of beamlet and is respectively formed a sense
Survey spot pattern be projected on measured target object, difference group beamlets corresponding to sensing spot pattern it is mutually the same but mutually it
Between there are preset positional shifts.
2. optical projection mould group as described in claim 1, which is characterized in that the sensing spot pattern is by the beam modulation
Element combines to be formed according to predetermined period after the illuminator spot pattern of light source is replicated more parts.
3. optical projection mould group as claimed in claim 2, which is characterized in that if the positional shift is in single illuminator hot spot
In the period of pattern, the positional shift is greater than or equal to adjacent light in spot pattern along the minimum offset that any direction decomposes
0.4 times of spot center spacing average value.
4. optical projection mould group as claimed in claim 3, which is characterized in that if being shifted out for the spot pattern is described
The signal period location of illuminator spot pattern, then the positional shift is subtracting along the minimum offset that any direction decomposes
Still meet after the product for the number of cycles gone the single illuminator spot pattern period size is exceeded with positional shift in the direction
More than or equal to 0.4 times of adjacent spots center spacing average value in spot pattern.
5. optical projection mould group as described in claim 1, which is characterized in that the beam splitter is selected from prism, grating, binary
One of Fresnel Lenses and combinations thereof.
6. optical projection mould group as described in claim 1, which is characterized in that the hot spot duty of the spot pattern after offset overlapping
It is less than or equal to the hot spot of single spot pattern for 1.3 times of the hot spot duty ratio more than or equal to single spot pattern than range
2 times of duty ratio.
7. optical projection mould group as described in claim 1, which is characterized in that the light source includes semiconductor base and is formed in
Illuminator on the semiconductor base, the illuminator are vertical cavity surface emitting laser.
8. optical projection mould group as claimed in claim 7, which is characterized in that the arrangement of the illuminator on a semiconductor substrate
Mode is selected from irregular arrangement, regular array, periodic arrangement or is the wide face type vertical cavity surface emitting laser of single hole.
9. a kind of sensing device, which is characterized in that its three-dimensional information for being used to sense measured target object comprising sensing mould group and
Optical projection mould group as claimed in any of claims 1 to 8 in one of claims, the sensing mould group is for sensing the optical projection mould
Predetermined pattern and the image by analyzing the predetermined pattern that group projects on measured target object obtain the three of tested subject matter
Tie up information.
10. a kind of equipment, which is characterized in that including sensing device as claimed in claim 9, the equipment is filled according to the sensing
The three-dimensional information of sensed measured target object is set to execute corresponding function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821905928.4U CN209690701U (en) | 2018-11-19 | 2018-11-19 | A kind of optical projection mould group, sensing device and equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821905928.4U CN209690701U (en) | 2018-11-19 | 2018-11-19 | A kind of optical projection mould group, sensing device and equipment |
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| Publication Number | Publication Date |
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| CN209690701U true CN209690701U (en) | 2019-11-26 |
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| CN201821905928.4U Withdrawn - After Issue CN209690701U (en) | 2018-11-19 | 2018-11-19 | A kind of optical projection mould group, sensing device and equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445239A (en) * | 2018-11-19 | 2019-03-08 | 深圳阜时科技有限公司 | A kind of optical projection mould group, sensing device and equipment |
-
2018
- 2018-11-19 CN CN201821905928.4U patent/CN209690701U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109445239A (en) * | 2018-11-19 | 2019-03-08 | 深圳阜时科技有限公司 | A kind of optical projection mould group, sensing device and equipment |
| CN109445239B (en) * | 2018-11-19 | 2024-05-24 | 深圳阜时科技有限公司 | Optical projection module, sensing device and equipment |
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