CN209728341U - Light splitting optical mould group and electronic equipment - Google Patents
Light splitting optical mould group and electronic equipment Download PDFInfo
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- CN209728341U CN209728341U CN201920197392.3U CN201920197392U CN209728341U CN 209728341 U CN209728341 U CN 209728341U CN 201920197392 U CN201920197392 U CN 201920197392U CN 209728341 U CN209728341 U CN 209728341U
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Abstract
The utility model discloses a kind of light splitting optical mould groups, comprising: luminescent device；And diffraction optical element, the diffraction optical element is arranged on the light exit path of the luminescent device, and be configured to be modulated incident light to project at least two groups light beam and the corresponding at least two groups hot spot of number can be formed on the target surface, wherein polarization direction difference, and/or the light path difference from luminescent device to target surface that at least two groups light beam is mutual.
Description
Technical field
The utility model relates to optical technical field more particularly to the technical fields of diffraction optical element modulation and projection.
Background technique
Currently, cell phone manufacturer starts gradually using structural light three-dimensional sensing technology, structured light technique (Structured
It Light) is a kind of active triangulation technology, the basic principle is that: controllable photoelectricity, striation are projected by laser projecting apparatus
Or smooth surface forms characteristic point to body surface, and shoots image by video camera, the projectional angle of characteristic point is obtained, then according to calibration
Direction in space, location parameter out calculate the distance between characteristic point and camera lens principal point using triangulation principle,
The three-dimensional appearance of detection object is obtained, realizes recognition of face, three-dimensional modeling etc..Currently used structural light three-dimensional sensing technology includes
Pattern (dot matrix or speckle) projective module group and imaging modules.As described in the patent US9825425 of PrimeSense.Three-dimensional is known
It two-dimentional Xiang Bi not identify, precision, which has, to be obviously improved, and approaches or surmount the accuracy of identification of human eye successively, and show huge business
Value.In Optics Express paper, Xiao Huang et al. proposes to utilize polarization structure pumped FIR laser, in complex background
Under luminous environment, three-dimensional modeling accuracy of identification is improved.
Structure light scheme is mainly used in the unlock of Face ID face and payment, the mobile phones such as Apple Pay mobile payment at present
Class application and secure payment class product, such as cash register, recognition of face class product, such as certification comparison, gate, security type produce
Product, such as intelligent door lock, the unmanned superfine non-cell phone type application of quotient have the scene of higher demand to accuracy of identification, therefore how
Improving accuracy of identification is each manufacturer's urgent need.The primary structural element DOE of structured light projection mould group is limited to manufacture energy at present
Power, minimum feature size can not further reduce, and lead to the feature dot density of speckle pattern, and point size and number can not improve.
According to known technical solution, multimode group, or complicated system (such as LCD MODULE LCD) is usually utilized to generate partially
Shake light, generates dot matrix through DOE, then extracts more three-dimensional informations.It determines currently without compact, inexpensive polarization structure photodissociation
Scheme.However, miniaturization, low cost solution is highly important for the consumer electronics industry.
The content of background technology part is only the technology that utility model people is known, natural representative this field does not show
There is technology.
Utility model content
In view of this, the utility model proposes a kind of light splitting optical mould groups, comprising: luminescent device；And diffraction optical element,
The diffraction optical element is arranged on the light exit path of the luminescent device, and is configured to be modulated incident light to throw
It projects at least two groups light beam and the corresponding at least two groups hot spot of number can be formed on the target surface, wherein at least two groups
The mutual polarization direction difference of light beam, and/or the light path difference from luminescent device to target surface.
One aspect according to the present utility model is provided with partially between the luminescent device and the diffraction optical element
Shake modulation element, and it is different extremely at polarization direction that the polarization modulation element is configured to the light modulation for being emitted the luminescent device
Few two groups of polarised lights, number correspond at least two groups light beam, and the diffraction optical element is configured to modulation described at least two
Group polarised light is to project at least two groups light beam, wherein the polarization modulation element is preferably polarization grating and/or polarisation
Film, the luminescent device are preferably vertical cavity surface emitting laser or edge-emitting laser or LED.The embodiments of the present invention
Design DOE using the characteristic optimizing of polarised light, can reduce the size of characteristic point, and can increase characteristic point at double number
Amount, to improve accuracy of identification.The utility model by the chip surface in light emitting semiconductor device (such as VCSEL, LED),
Diffractive optical structure is made, control lighting cavity generates specific polarised light.For example, being directed to VCSEL light source point design diffraction light
Grid structure allows it to generate two groups of polarised lights.DOE of each group of polarised light by polarization optimization design can project one group of feature
Dot pattern.Quantity relative to traditional scheme, point doubles, and may be implemented to greatly improve accuracy of identification.
One aspect according to the present utility model, the diffraction optical element are configured to project two groups of light beams and can be in mesh
Mark forms two groups of hot spots on surface, or projects four groups of light beams and can form four groups of hot spots on the target surface.
One aspect according to the present utility model, the light splitting optical mould group further includes beam splitting element, the beam splitting element
It is arranged between the luminescent device and the diffraction optical element, and is configured to received light being divided at least two groups beam splitting
Light, number correspond at least two groups light beam, and the diffraction optical element is configured to receive at least two groups beam splitting light, and
Modulate and project at least two groups light beam.
One aspect according to the present utility model is configured to receive wherein the beam splitting element is polarization beam splitting element
Light be divided into the different at least two groups polarised light in polarization direction.
One aspect according to the present utility model, the beam splitting element are unpolarized optical splitter.
One aspect according to the present utility model, the diffraction optical element are configured to incidence that can be different by polarization direction
Light modulation to form the pattern of distinguishing at least two groups hot spot on the target surface.
The utility model also provides a kind of light modulating method, comprising: receives the light that luminescent device issues；With pass through diffraction light
It learns element to be modulated the light from the luminescent device, to project at least two groups light beam and can be formed on the target surface
The corresponding at least two groups hot spot of number, wherein the mutual polarization direction of at least two groups light beam is different, and/or from hair
The light path of optical device to target surface is different.
One aspect according to the present utility model, the light modulating method further includes will be described by polarization modulation element
The light modulation of the luminescent device outgoing at least two groups polarised light different at polarization direction, number correspond at least two groups light
Beam, the diffraction optical element are configured to modulate at least two groups polarised light to project at least two groups light beam, wherein
The polarization modulation element is preferably polarization grating and/or light polarizing film, and the luminescent device is preferably vertical cavity surface-emitting laser
Device or edge-emitting laser or LED
One aspect according to the present utility model, the diffraction optical element are configured to project two groups of light beams and can be in mesh
Mark forms two groups of hot spots on surface, or projects four groups of light beams and can form four groups of hot spots on the target surface.
One aspect according to the present utility model, the light modulating method further include by being arranged in the luminescent device
With the beam splitting element between the diffraction optical element, received light is divided at least two groups beam splitting light, number corresponds to described
At least two groups light beam, the diffraction optical element is configured to receive at least two groups beam splitting light, and modulates and project and is described
At least two groups light beam.
One aspect according to the present utility model is configured to receive wherein the beam splitting element is polarization beam splitting element
Light be divided into the different at least two groups polarised light in polarization direction；Or the beam splitting element is unpolarized optical splitter.
One aspect according to the present utility model, the diffraction optical element are configured to incidence that can be different by polarization direction
Light modulation to form the pattern of distinguishing at least two groups hot spot on the target surface.
The utility model also provides a kind of electronic equipment, comprising: light splitting optical mould group as described above；Camera, it is described
Camera acquires the pattern that the hot spot is formed；And processing unit, the processing unit receive the pattern of the camera acquisition
And the pattern is handled.
The utility model also provides a kind of manufacturing method of light splitting optical mould group, comprising: provides the substrate of optics module；In
Luminescent device is prepared in the substrate；Diffraction optical element, the diffraction are formed on the light exit path of the luminescent device
Optical element is configured to be modulated incident light to project at least two groups light beam and can form number phase on the target surface
Corresponding at least two groups hot spot, the mutual polarization direction of at least two groups light beam are different, and/or from luminescent device to mesh
The light path for marking surface is different.
One aspect according to the present utility model, the manufacturing method further include: spread out in the luminescent device with described
It penetrates and polarization modulation element is set between optical element, the polarization modulation element is configured to the light tune for being emitted the luminescent device
The different at least two groups polarised light in polarization direction is made, number corresponds at least two groups light beam, the diffraction optical element
It is configured to modulate at least two groups polarised light to project at least two groups light beam, wherein the polarization modulation element is preferred
For polarization grating and/or light polarizing film, the luminescent device be preferably vertical cavity surface emitting laser or edge-emitting laser or
LED。
One aspect according to the present utility model, the manufacturing method further include: further include the luminescent device with
Beam splitting element is set between the diffraction optical element, and the beam splitting element simultaneously is configured to for received light to be divided at least two groups point
Shu Guang, number correspond at least two groups light beam, and the diffraction optical element is configured to receive at least two groups beam splitting light,
And modulate and project at least two groups light beam.
Detailed description of the invention
The attached drawing for constituting a part of the utility model is used to provide a further understanding of the present invention, this is practical new
The illustrative embodiments and their description of type are not constituteed improper limits to the present invention for explaining the utility model.In
In attached drawing:
Fig. 1 shows a kind of light splitting optical mould group according to the utility model first embodiment；
Fig. 2 shows the light splitting optical mould groups according to the utility model second embodiment；
Fig. 3 shows an example of luminescent device；
Fig. 4 shows the pattern of the random light emission point of luminescent device in the case where no polarization modulation element；
After Fig. 5 shows setting polarization modulation element, the light that each luminescent device issues is modulated to both direction
Polarised light；
Fig. 6 shows the spot pattern projected according to the utility model one embodiment；
Fig. 7 is according to the spot pattern projected of another embodiment of the utility model；
Fig. 8 shows the light splitting optical mould group according to another embodiment of the utility model；
Fig. 9 shows the light modulating method according to the utility model one embodiment；
Figure 10 shows the electronic equipment according to another embodiment of the utility model；
Figure 11 shows a kind of manufacturing method of light splitting optical mould group according to the utility model one embodiment；With
Figure 12 shows the light splitting optical mould group according to another embodiment of the utility model.
Specific embodiment
Hereinafter, certain exemplary embodiments are simply just described.As one skilled in the art will recognize that
Like that, without departing from the spirit or scope of the present utility model, it can be modified by various different modes described real
Apply example.Therefore, attached drawing and description are considered essentially illustrative rather than restrictive.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", "
Width ", " thickness ", " go up hard straight ", " level ", " top in ", " under ", " preceding ", " afterwards ", " left side ", " right side ", " ", " bottom ", " it is interior ", "
Outside ", " clockwise ", " " orientation or positional relationship of equal instructions is to be based on the orientation or positional relationship shown in the drawings, only counterclockwise
It is the utility model and simplified description for ease of description, rather than the device or element of indication or suggestion meaning must have spy
Fixed orientation is constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.In addition, term "
First ", " second " was used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicated indicated
Technical characteristic quantity.Define " first " as a result, the feature of " second " can explicitly or implicitly include one or
More described features." multiple " are meant that two or more in the description of the present invention, unless otherwise bright
It is really specific to limit.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " be connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection: can be mechanical connection, be also possible to be electrically connected or can mutually communicate；It can be directly connected, it can also be in
Between medium be indirectly connected, can be the connection inside two elements or the interaction relationship of 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.
In the present invention unless specifically defined or limited otherwise, fisrt feature in second feature its " upper " or
It " under " may include that the first and second features directly contact, also may include the first and second features be not direct contact but
Pass through the other characterisation contact between them.Moreover, fisrt feature second feature " on ", " top " and " above " include
Fisrt feature is right above second feature and oblique upper, or is merely representative of first feature horizontal height higher than second feature.First
Feature second feature " under ", " lower section " and " below " including fisrt feature right above second feature and oblique upper, or only
Only indicate that first feature horizontal height is less than second feature.
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, hereinafter the component of specific examples and setting are described.Certainly, they are only
Example, and purpose does not lie in limitation the utility model.In addition, the utility model can in different examples repeat reference numerals
And/or reference letter, this repetition are for purposes of simplicity and clarity, itself not indicate discussed various embodiments
And/or the relationship between setting.In addition, the example of various specific techniques and material that the utility model provides, but this
Field those of ordinary skill can be appreciated that the application of other techniques and/or the use of other materials.
It is illustrated below in conjunction with preferred embodiment of the attached drawing to the utility model, it should be understood that described herein excellent
It selects embodiment to be only used for describing and explaining the present invention, is not used to limit the utility model.
Fig. 1 shows a kind of light splitting optical mould group 100 according to the utility model first embodiment.As shown in Fig. 1, point
Beam optics mould group 100 includes: luminescent device 101 and diffraction optical element DOE103.Diffraction optical element 103 is arranged in photophore
On the light exit path of part 101, and it is configured to be modulated incident light to project at least two groups light beam and can be in object table
The corresponding at least two groups hot spot of number is formed on face 105, wherein the mutual polarization direction of at least two groups light beam is not
It is same, and/or different to the light path of target surface 105 from luminescent device 101.It is detailed below.
As shown in Figure 1, luminescent device 101 can be polarized light source, it is also possible to unpolarized light source.Luminescent device 101
Light beam 102 is issued, diffraction optical element 103 is modulated incident light, and projects first group of light beam 104 and second group of light beam
106, corresponding two groups of hot spots are formed on target surface 105.Wherein first group of light beam 104 and second group of light beam 106 are certain
It is different in terms of optical characteristics, such as polarization direction difference, and/or not from luminescent device 101 to the light path of target surface 105
Together.Other than polarization direction, light path, those skilled in the art are contemplated that using other optical characteristics.These all exist
In the scope of the utility model.Wherein target surface 105 can be face or other to be identified or irradiation surfaces, both
It can be plane, be also possible to curved surface.Meanwhile it will be appreciated by those skilled in the art that first group in the utility model
Light beam and second group of light beam are opposite concepts.As described above, the light beam of different groups is different in terms of certain optical characteristics,
And the light in same group of light beam is identical in terms of these optical characteristics, such as polarization direction is identical, and/from luminescent device 101
Light path to target surface 105 is identical.
Compared to the prior art, the light splitting optical mould group 100 of the utility model first embodiment can be by the incident beam modulated
Two groups of hot spots are projected, this two groups of hot spots are not exclusively overlapped in position, while it is for example inclined to carry some other information
Vibration information.The feature dot density sum number amount of speckle pattern has obtained further raising by the embodiment of the utility model, thus
Improve accuracy of identification.
Fig. 1 is illustrated by taking two groups of light beams, two groups of hot spots as an example.Those skilled in the art can adopt on this basis
With the technical solution of more multiple groups light beam, more multiple groups hot spot.These are all in the scope of the utility model.
The preferred embodiment of the utility model light splitting optical mould group is described below.
Fig. 2 shows the light splitting optical mould groups 200 according to the utility model second embodiment.As shown in Fig. 2, luminescent device
201 two groups of polarised lights 2021 and 2022 of outgoing, wherein polarised light 2021 is, for example, the polarised light in the direction X, and polarised light 2022 is for example
For the polarised light of Y-direction.Polarised light 2021 and 2022 is incident on diffraction optical element 203, and diffraction optical element 203 is configured to
According to the polarization state of incident light, two groups of polarised lights 2021 and 2022 are modulated to project two groups of light beams 204 and 206, In
Two groups of hot spots are formed on target surface 205, wherein the polarization direction of light beam 204 and 206 is different.
Fig. 3 shows an example of luminescent device 201.As shown in figure 3, luminescent device 201 includes vertical-cavity surface-emitting
Laser (VCSEL) 2011 and polarization modulation element 2013, what polarization modulation element 2013 was configured to for luminescent device 201 to be emitted
The light modulation at least two groups polarised light different at polarization direction, number corresponds at least two groups light beam, wherein the polarization
Modulation element 2013 is preferably polarization grating.It optionally, can also be more by being attached on vertical cavity surface emitting laser 2011
The light polarizing film in a direction realizes polarization modulation element 2013.It is readily appreciated that, in addition to vertical cavity surface emitting laser, luminescent device
201 may also include edge-emitting laser or LED.
The embodiments of the present invention can by the chip surface in light emitting semiconductor device (such as VCSEL, LED),
It makes diffractive optical structure (such as polarization grating), control lighting cavity generates specific polarised light.For example, being directed to VCSEL light
Source point designs diffraction grating structure, it is allowed to generate two groups of polarised lights.Diffraction light of each group of polarised light by polarization optimization design
One group of feature dot pattern can be projected by learning element DOE.Quantity relative to traditional scheme, point doubles, and may be implemented big
Width improves accuracy of identification.The present embodiment relates generally to process diffractive optical structure in the upper surface of VCSEL emitting cavity, can make
The linearly polarized light of VCSEL sending special polarization state.As shown in Fig. 2, processing grating in the upper surface VCSEL, realizing VCSEL's
A single point light source output both direction polarised light.The DOE element Jing Guo optimization design is combined, dot matrix as shown in FIG. 6 is formed.
The present embodiment makes full use of the characteristic of polarised light, and the surface of VCSEL random light emission source point is designed to super surface
(metasurface), it is made to issue the linearly polarized light of the linearly polarized light of X-direction and Y-direction, while excellent according to the direction of polarised light
Change design polarization DOE structure, generates two groups of polarization structure luminous point battle arrays.Compared with traditional design scheme, the quantity of characteristic point is doubled.
And the size of characteristic point can be reduced, the density of further lifting feature point.
It is readily appreciated that, the luminescent device of the present embodiment may include VCSEL light source dot matrix.
Scheme described in the present embodiment can increase project structured light mould group at double characteristic point quantity, and can
To reduce the size of characteristic point, to improve accuracy of identification.
If the trimmed book body that light source issues is non-polarized light, the Polarization Modulation member of the upper surface VCSEL can also be passed through
Part (such as polarization grating) becomes the polarised light of different directions, so as to form distinguishing dot matrix to different polarization directions
Pattern.
Fig. 3 shows the light modulation for issuing VCSEL2011 by polarization modulation element 2013 at least two directions
Polarised light.The utility model is not limited by individual polarization modulation element to generate polarised light, can also directly be arranged to
Lack two polarized light sources to generate the polarised light at least two directions.These are all within the protection scope of the present utility model.
Fig. 4 is shown in the case where no polarization modulation element 2013, vertical cavity surface emitting laser 2011 it is random
The pattern of luminous point.After Fig. 5 shows setting polarization modulation element 2013, each vertical cavity surface emitting laser 2011 is issued
Light be modulated to the polarised light of both direction, the respectively polarised light of the polarised light of X-direction and Y-direction.Fig. 6 shows polarization
After the light that modulation element 2013 is emitted is modulated by diffraction optical element 203, two groups of hot spots are formd on the target surface, because
The number of spots projected is increased one times by this.
Diffraction optical element 203 is configured to can be by the different the incident beam modulated in polarization direction to be formed on the target surface
The pattern of at least two groups hot spot of difference." distinguishing at least two groups hot spot " refers in the utility model deposits between two groups of hot spots
Difference in some aspects, such as the difference on facula position form difference between the polarization direction of the light of hot spot, light
The difference etc. of light path from light source to target surface.
It is to be illustrated by taking two groups of polarised lights as an example above, it should be readily apparent to one skilled in the art that the utility model can
To use more multiple groups polarised light.As shown in Figure 7, wherein the light that each vertical cavity surface emitting laser 2011 issues is by polarization
Modulation element 2013 is modulated into the polarised light of four direction, and the respectively direction α polarised light, the direction β polarised light, the direction γ is inclined
Shake light and the direction δ polarised light, realizes a single point light source output four direction polarised light of VCSEL.2013 needle of diffraction optical element
The polarization direction of polarised light is modulated, four groups of hot spots are projected, wherein the polarization direction of the light of every group of hot spot is all different.
In this way, compared to the technical side of the light projection for directly issuing vertical cavity surface emitting laser 2011 to diffraction optical element 2013
Case, each direction of polarized light form a dot matrix, and the number of hot spot has become four times.
Above to be mainly illustrated by taking vertical cavity surface emitting laser as an example, luminescent device 201 is not limited to vertical cavity
Surface-emitting laser also may include other kinds of polarization or unpolarized light source.
Fig. 8 shows the light splitting optical mould group 300 according to another preferred embodiment of the utility model.As shown in figure 3, removing
Except luminescent device 301 and diffraction optical element 303, light splitting optical mould group 300 further includes beam splitting element 307, beam splitting element
307 are arranged between the luminescent device 301 and the diffraction optical element 303, and are configured to for received light being divided at least
Two groups of beam splitting light, number correspond at least two groups light beam, and the diffraction optical element 303 is configured to receive described at least two
Group beam splitting light, and at least two groups light beam is modulated and projects, to form number corresponding at least two on target surface 305
Group hot spot.
According to a preferred embodiment, the beam splitting element 307 is polarization beam splitting element, is configured to for received light being divided into
The different at least two groups polarised light in polarization direction, is incident on diffraction optical element 303, with the corresponding at least two groups polarization side of number
To different beam projectings, the hot spot of corresponding number is formed.
A preferred embodiment according to the present utility model, as shown in figure 8, beam splitting element 307 is polarizing beam splitter, including
Polarization beam splitting face 3071 and reflecting surface 3072.Polarization beam splitting face 3071 may make incident light 302 to be separated according to its polarization direction,
Such as X-direction polarised light 3022, it is injected on diffraction optical element 303 by refraction；Y-direction polarised light 3021 is by polarization point
Beam face 3071 is reflected, and then is reflected by reflecting surface 3072, is again incident on diffraction optical element 303.For Y-direction polarised light
3021, the light source virtual image is 301 ', as shown in figure 8, the light path of Y-direction polarised light 3021 is longer, the light of X-direction polarised light 3022
Journey is shorter.
According to one embodiment, the beam splitting element 307 can be unpolarized optical splitter.
By the way that optical splitter/beam splitting element is arranged, luminescent device can reduce the distance between to diffraction optical element DOE,
Increase quantity a little simultaneously, is directly added into polarized light splitting device in light source and DOE.If the device uses refractive index for 1.5
Material, wherein the light path of the polarised light 3022 of polarization direction 1 will increase about 50%, the light path of the polarised light 3021 of polarization direction 2
About 100% will be increased.Long-focus can be formed in this way and dot matrix projective module group that short focus combines, be conducive to increase working distance
From.According to image relationship, the light beam of optical length corresponds to long-focus, and the short light beam of light path corresponds to short focus.If luminescent device is
Unpolarized, beam splitter is ordinary beamsplitter, and above-mentioned index path scheme is equally applicable.The light path of the separated light beam of optical splitter will
Difference causes focal length different.Illustrate by taking Fig. 8 embodiment as an example, for unpolarized luminescent device, diffraction optical element 303
Different zones can have different microstructure (examples according to the light path length (object distance is different) of different groups of incident beam
As in fig. 8, the microstructure of 303 upper half of diffraction optical element and the microstructure of lower half are different, respectively to being incident on
The different light beam of light path thereon is modulated), incident beam is modulated accordingly according to light path length, to be formed not
Same focal length.And for the luminescent device of polarization, can be arranged on diffraction optical element 303 with subregion different microstructures to
The polarised light in different polarization direction is modulated accordingly, different microstructures, class are set it is also not necessary to subregion
Like Fig. 1 and situation shown in Fig. 2, the light beam in different polarization direction is incident on diffraction optical element, and diffraction optical element can root
It is modulated accordingly according to the polarization direction of incident light.If light source is divided into 2 or more light beams, above-mentioned index path scheme is also same
Sample is applicable in.Two groups of hot spots are shown located in different planes in Fig. 8, do not constitute limitations of the present invention, two groups
Hot spot can also be located in identical plane.
The embodiment of Fig. 8 can be combined with the embodiment of Fig. 2-7, such as the luminescent device 301 of Fig. 8 may include polarization
Modulation element is gone forward side by side so that the light of single point light source is modulated to multiple directions polarised light, such as the polarised light of both direction
And it is incident on beam splitting element 307.
Fig. 9 shows the light modulating method 400 according to the utility model one embodiment.As shown in figure 9, light modulating method
400 include:
In step S401, the light that luminescent device issues is received.
In step S402, the light from the luminescent device is modulated by diffraction optical element, with project to
Few two groups of light beams simultaneously can form the corresponding at least two groups hot spot of number on the target surface, wherein at least two groups light beam phase
Polarization direction difference between mutually, and/or the light path from luminescent device to target surface are different.
The light modulating method 400 of the present embodiment can by light splitting optical mould group 100,200,300 as described above come into
Row.
A preferred embodiment according to the present utility model, light modulating method 400 further includes will by polarization modulation element
The light modulation of the luminescent device outgoing at least two groups polarised light different at polarization direction, number correspond at least two groups
Light beam, wherein diffraction optical element is configured to modulate at least two groups polarised light to project at least two groups light beam,
Described in polarization modulation element be preferably polarization grating and/or light polarizing film, the luminescent device is preferably vertical-cavity surface-emitting and swashs
Light device or edge-emitting laser or LED.The light of vertical cavity surface emitting laser outgoing is illustrated in figure 5 by polarization modulation element
The X-direction polarised light and Y-direction polarised light formed after (such as polarization grating or polarizing coating).Diffraction optical element is for inclined
Vibration light is designed, and is projected different light beams according to the difference of polarization direction, is formed corresponding hot spot.
The utility model is not limited to the number of light beam and hot spot, can be two groups of light beams and two groups of hot spots, is also possible to four
Group light beam and four groups of hot spots, can also be with other numbers.These are all within the protection scope of the present utility model.
A preferred embodiment according to the present utility model further includes being spread out in the luminescent device with described by being arranged
The beam splitting element between optical element is penetrated, received light is divided at least two groups beam splitting light, number corresponds at least two groups
Light beam, the diffraction optical element is configured to receive at least two groups beam splitting light, and modulates and project at least two groups
Light beam.Wherein the beam splitting element can be polarization beam splitting element, be configured to received light being divided into polarization direction different extremely
Few two groups of polarised lights.Beam splitting element may be unpolarized optical splitter.
A preferred embodiment according to the present utility model, diffraction optical element is configured to can be different by polarization direction
The incident beam modulated to form the pattern of distinguishing at least two groups hot spot on the target surface.
Figure 10 shows the electronic equipment 500 according to another embodiment of the utility model, comprising: beam splitting light as described above
Learn mould group 100/200/300, camera 501 and processing unit 502.Electronic equipment 500 can be mobile phone, PAD, notebook
Various types of electronic equipments such as computer, desktop computer, monitoring system.Light splitting optical mould group project on the target surface to
After few two groups of hot spots, camera 501 acquires the pattern that the hot spot is formed, and processing unit 502 is transferred to be handled and divided
Analysis.The embodiments of the present invention can have a various uses, for example, for by acquired after projective structure light spot pattern into
The applications such as row unlock, recognition of face, monitoring.The receiver that can be polarization is also possible to common receiver.If it is common
Receiver, so that it may simply gather together image processing.If it is polarized reception device, the polarization properties information of physics
It records together, as more accurately three-dimension sensor.
Figure 11 shows a kind of manufacturing method 600 of light splitting optical mould group according to the utility model one embodiment.Such as
Shown in Figure 11, in step S601, the substrate of optics module is provided；In step S602, luminescent device is prepared on the substrate；In
Step S603, forms diffraction optical element on the light exit path of the luminescent device, and the diffraction optical element is configured to
Incident light is modulated to project at least two groups light beam and the corresponding at least two groups of number can be formed on the target surface
Hot spot, the mutual polarization direction difference of at least two groups light beam, and/or the light path from luminescent device to target surface are not
Together.
One embodiment according to the present utility model, manufacturing method 600 further include: in the luminescent device and the diffraction
Polarization modulation element is set between optical element, and the polarization modulation element is configured to the light modulation for being emitted the luminescent device
At the different at least two groups polarised light in polarization direction, number corresponds at least two groups light beam, and the diffraction optical element is matched
The modulation at least two groups polarised light is set to project at least two groups light beam, wherein the polarization modulation element is preferably
Polarization grating and/or light polarizing film, the luminescent device are preferably vertical cavity surface emitting laser or edge-emitting laser or LED.
One embodiment according to the present utility model, manufacturing method 600 further include: the luminescent device and the diffraction light
It learns and beam splitting element is set between element, the beam splitting element simultaneously is configured to for received light to be divided at least two groups beam splitting light, number
Corresponding at least two groups light beam, the diffraction optical element is configured to receive at least two groups beam splitting light, and modulate and
Project at least two groups light beam.
Figure 12 shows the light splitting optical mould group 700 according to another embodiment of the utility model, with shown in Fig. 8 points
Beam optics mould group 300 is similar.Light splitting optical mould group 300 compared to Fig. 8, the light splitting optical mould group 700 of Figure 12 include multiple points
Beam face, such as beam-splitting surface shown in figure 1, beam-splitting surface 2, beam-splitting surface 3, beam-splitting surface 4 or more beam-splitting surfaces.It is more by being arranged
The light beam that light source issues can be divided into the different light beam of multiple groups light path, four groups of light beams is shown as in Figure 12, respectively by a beam-splitting surface
The different zones being incident on diffraction optical element surface go out.Correspondingly, the different zones on diffraction optical element surface
There is different microstructures according to the difference of incident beam light path, incident beam is modulated accordingly, to be formed
Different focal length projects different groups of light beam and can form the corresponding hot spot of number on the target surface.Alternatively, each beam splitting
Face can be polarization beam splitting face, such as the light beam that light source issues is divided into the polarised light of multiple polarization directions.In the case, spread out
Penetrating on optical element surface necessarily has different microstructures in different zones, shown in situation as depicted in figs. 1 and 2,
The light beam in different polarization direction is incident on diffraction optical element, and diffraction optical element can be carried out according to the polarization direction of incident light
Corresponding modulation.By increasing multiple beam-splitting surfaces, each light beam corresponds to different focal lengths, and long short focus combines, Neng Gouzeng
Add the range covered.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
Within the spirit and principle of utility model, any modification, equivalent replacement, improvement and so on should be included in the utility model
Protection scope within.
Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention, it is not limited to this
Utility model, although the utility model is described in detail with reference to the foregoing embodiments, for those skilled in the art
For, it is still possible to modify the technical solutions described in the foregoing embodiments, or to part of technical characteristic
It is equivalently replaced.Within the spirit and principle of the utility model, any modification, equivalent replacement, improvement and so on,
It should be included within the scope of protection of this utility model.
Claims (11)
1. a kind of light splitting optical mould group characterized by comprising
Luminescent device；With
Diffraction optical element, the diffraction optical element are arranged on the light exit path of the luminescent device, and are configured to pair
Incident light is modulated to project at least two groups light beam and can form the corresponding at least two groups light of number on the target surface
Spot,
The wherein mutual polarization direction difference of at least two groups light beam, and/or the light from luminescent device to target surface
Cheng Butong.
2. light splitting optical mould group according to claim 1, which is characterized in that in the luminescent device and the diffraction optics
Be provided with polarization modulation element between element, the polarization modulation element be configured to the light modulation for being emitted the luminescent device at
The different at least two groups polarised light in polarization direction, number correspond at least two groups light beam, the diffraction optical element configuration
At the modulation at least two groups polarised light to project at least two groups light beam.
3. light splitting optical mould group according to claim 2, which is characterized in that the polarization modulation element is polarization grating
And/or light polarizing film.
4. light splitting optical mould group according to any one of claim 1-3, which is characterized in that the diffraction optical element is matched
It is set to and projects two groups of light beams and two groups of hot spots can be formed on the target surface, or project four groups of light beams and can be in target surface
Four groups of hot spots of upper formation.
5. light splitting optical mould group according to any one of claim 1-3, which is characterized in that it further include beam splitting element, institute
It states beam splitting element to be arranged between the luminescent device and the diffraction optical element, and is configured to for received light being divided at least
Two groups of beam splitting light, number correspond at least two groups light beam, and the diffraction optical element is configured to receive at least two groups
Beam splitting light, and modulate and project at least two groups light beam.
6. light splitting optical mould group according to claim 5, which is characterized in that the beam splitting element is polarization beam splitting element,
It is configured to for received light to be divided into the different at least two groups polarised light in polarization direction.
7. light splitting optical mould group according to any one of claim 1-3, which is characterized in that the diffraction optical element tool
There are at least two regions corresponding with the number of spots, the microstructure at least two region is different, matches respectively
The light beam different to light path incident thereon is set to be modulated.
8. light splitting optical mould group according to any one of claim 1-3, which is characterized in that the diffraction optical element is matched
It is set to the pattern that the different the incident beam modulated in polarization direction can be formed on the target surface to distinguishing at least two groups hot spot.
9. light splitting optical mould group according to any one of claim 1-3, which is characterized in that the beam splitting element is non-inclined
The optical splitter of vibration.
10. light splitting optical mould group according to any one of claim 1-3, which is characterized in that the luminescent device is vertical
Straight cavity surface-emitting laser or edge-emitting laser or LED.
11. a kind of electronic equipment characterized by comprising
Such as light splitting optical mould group of any of claims 1-10；
Camera, the camera acquire the pattern that the hot spot is formed；With
Processing unit, the processing unit receive the pattern of the camera acquisition and handle the pattern.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920197392.3U CN209728341U (en) | 2019-02-14 | 2019-02-14 | Light splitting optical mould group and electronic equipment |
| PCT/CN2020/071453 WO2020164346A1 (en) | 2019-02-14 | 2020-01-10 | Beam-splitting optical module and manufacturing method therefor |
| EP20756111.9A EP3926388A4 (en) | 2019-02-14 | 2020-01-10 | Beam-splitting optical module and manufacturing method therefor |
| US17/431,060 US20220075200A1 (en) | 2019-02-14 | 2020-01-10 | Beam-splitting optical module and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920197392.3U CN209728341U (en) | 2019-02-14 | 2019-02-14 | Light splitting optical mould group and electronic equipment |
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| Publication Number | Publication Date |
|---|---|
| CN209728341U true CN209728341U (en) | 2019-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920197392.3U Active CN209728341U (en) | 2019-02-14 | 2019-02-14 | Light splitting optical mould group and electronic equipment |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669271A (en) * | 2019-02-14 | 2019-04-23 | 杭州驭光光电科技有限公司 | Light splitting optical mould group and its manufacturing method |
| WO2020164346A1 (en) * | 2019-02-14 | 2020-08-20 | 杭州驭光光电科技有限公司 | Beam-splitting optical module and manufacturing method therefor |
-
2019
- 2019-02-14 CN CN201920197392.3U patent/CN209728341U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109669271A (en) * | 2019-02-14 | 2019-04-23 | 杭州驭光光电科技有限公司 | Light splitting optical mould group and its manufacturing method |
| WO2020164346A1 (en) * | 2019-02-14 | 2020-08-20 | 杭州驭光光电科技有限公司 | Beam-splitting optical module and manufacturing method therefor |
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