CN208673019U - Optical projection apparatus and electronic device - Google Patents
Optical projection apparatus and electronic device Download PDFInfo
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- CN208673019U CN208673019U CN201821540084.8U CN201821540084U CN208673019U CN 208673019 U CN208673019 U CN 208673019U CN 201821540084 U CN201821540084 U CN 201821540084U CN 208673019 U CN208673019 U CN 208673019U
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- optical projection
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Abstract
The utility model discloses a kind of optical projection apparatus and electronic devices, the optical projection apparatus includes that optical path changes element, laser and diffraction optical element, the optical path, which changes element, has incidence surface, light-emitting surface and reflecting surface, and at least one of the incidence surface and the light-emitting surface are with non-spherical structure.The optical path changes element and is set between the reflecting surface and the laser.The light-emitting surface that the optical path changes element is set between the reflecting surface and the diffraction optical element；Wherein the reflecting surface is located at the light emission path between the laser and the diffraction optical element.The optical projection apparatus is by being integrated in incidence surface and the light-emitting surface that the optical path changes element for multiple collimation lenses of current optical projection apparatus, reduce the setting of collimation lens, the optical property of the optical projection apparatus can not only be maintained, the height for reducing the optical projection apparatus simultaneously, also reduces manufacturing cost.
Description
Technical field
The utility model relates to field of photoelectric technology more particularly to a kind of optical projection apparatus and electronic device.
Background technique
Referring to Fig. 8, current projection arrangement 9 includes laser 90, prism 91, collimation lens set 92 and projection optics member
Part 93, prism 91 are set between laser 90 and projection optics 93, and collimation lens set 92 is set to prism 91 and projection
Between optical element 93.The laser source that laser 90 is issued propagates to prism 91 along horizontal direction, is reflected by prism 91
Laser source and the direction of propagation for changing laser source, the laser source reflected through prism 91 is along vertically propagating to collimation lens set
92, collimation lens set 92 is laminated to be formed by least three collimation lenses, and for correcting laser source through reflection, corrected
Laser source propagates to projection optics 93, and projection optics 93 allow corrected laser source to project to object.
It can be seen from the above, current projection arrangement 9 is equipped with the collimation lens set 92 of multiple collimation lenses in vertical direction,
Cause the height of projection arrangement 9 excessive, if be applied to electronic device, causes the thickness of electronic device to increase, and multiple standards
The manufacturing cost of straight lens is also excessively high.
Utility model content
The utility model embodiment provides a kind of optical projection apparatus and electronic device, to solve current optical projection dress
The height set it is excessive can not be applied to towards frivolous development electronic device the problem of.
In order to solve the above-mentioned technical problem, the utility model is realized in this way:
In a first aspect, providing a kind of optical projection apparatus comprising: optical path changes element, with incidence surface, goes out light
At least one of face and reflecting surface, the incidence surface and the light-emitting surface are with non-spherical structure；Laser, the optical path change member
The incidence surface of part is set between the reflecting surface and the laser；And diffraction optical element, the optical path change being somebody's turn to do for element
Light-emitting surface is set between the reflecting surface and the diffraction optical element；Wherein the reflecting surface is located at the laser and the diffraction optics
Light emission path between element.
Second aspect provides a kind of electronic device, has specific pattern to project objects using the optical projection apparatus
The light source and image acquisition module of case capture the image information that the light source is reflected by the object.
In the utility model embodiment, optical projection apparatus is by by multiple collimation lenses of current optical projection apparatus
It is integrated in incidence surface and light-emitting surface that optical path changes element, the setting of collimation lens is reduced, can not only maintain optical projection apparatus
Optical property, while reducing the height of optical projection apparatus, also reduce manufacturing cost.The optical projection apparatus of small size is answered
For in electronic device, making electronic device meet frivolous demand.
Detailed description of the invention
Attached drawing described herein is used to provide a further understanding of the present invention, and constitutes one of the utility model
Point, the exemplary embodiment of the utility model and the description thereof are used to explain the utility model, does not constitute to the utility model
Improper restriction.In the accompanying drawings:
Fig. 1 is the schematic diagram of the optical projection apparatus of the utility model first embodiment.
Fig. 2 is the schematic diagram of the optical projection apparatus of the utility model second embodiment.
Fig. 3 is the schematic diagram of the optical projection apparatus of the utility model 3rd embodiment.
Fig. 4 is the schematic diagram of the optical projection apparatus of the utility model fourth embodiment.
Fig. 5 is the schematic diagram of the optical projection apparatus of the 5th embodiment of the utility model.
Fig. 6 is the schematic diagram of the optical projection apparatus of the utility model sixth embodiment.
Fig. 7 is the schematic diagram of the electronic device of the 7th embodiment of the utility model.
Fig. 8 is the schematic diagram of the optical projection apparatus of the prior art.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
It clearly and completely describes, it is clear that the embodiments are a part of the embodiments of the present invention, rather than whole implementation
Example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without creative efforts
The every other embodiment obtained, fall within the protection scope of the utility model.
Referring to Fig. 1, it is the schematic diagram of the optical projection apparatus of the utility model first embodiment；As shown, this
Embodiment provides a kind of optical projection apparatus 1, and optical projection apparatus 1 includes laser 10, optical path change element 11 and diffraction light
Learn element 12.
For example, optical path change element 11 can be reflecting mirror, prism, spectroscope or other it is any be suitable for changing it is incident
Change the component of the light transmission path of element 11 to optical path.Optical path, which changes element 11, to be had between incidence surface 111 and incidence surface 111
Light-emitting surface 112 with angle and the reflecting surface between incidence surface 111 and light-emitting surface 112 113, incidence surface 111 and light out
At least one of face 112 is with non-spherical structure.In the present embodiment, incidence surface 111 has the first non-spherical structure
1111, light-emitting surface 112 has the second non-spherical structure 1121.For example, it is prism, incidence surface 111 that optical path, which changes element 11,
Angle between light-emitting surface 112 is 90 degree, and the curvature of the first non-spherical structure 1111 and the second non-spherical structure 1121 is positive
Curvature.The material that the optical path of the present embodiment changes element 11 is glass or plastic cement, and can form aspheric by injection molding
Face structure.The focal power that the optical path of the present embodiment changes element 11 is calculated by following formula:
1/F1=(1/R1+1/R2) × (n-1) formula (1)
Wherein F1 is the focal length that optical path changes element 11, and such as effective focal length (effective focal length), R1 is
The vertex curvature radius of first non-spherical structure 1111, R2 are the vertex curvature radius of the second non-spherical structure 1121, and n is optical path
Change the Refractive Index of Material of element 11.In one embodiment, F1 > 0.In one embodiment, F1 < 20mm.The present embodiment laser
10 light-emitting window and optical path change the distance between the incidence surface 111 of element 11 D can change one times of coke of element 11 between optical path
Between two times of focal lengths for changing element 11 away from optical path, i.e. F1 < D < 2F1.
Optical path changes element 11 and is set on the light emission path between laser 10 and diffraction optical element 12, laser
Device 10 is located at the side that optical path changes the incidence surface 111 of element 11, and diffraction optical element 12 is located at optical path and changes going out for element 11
The side of smooth surface 112.In the present embodiment, the incidence surface 111 that optical path changes element 11 is set to reflecting surface 113 and laser 10
Between, the light-emitting surface 112 that optical path changes element 11 is set between reflecting surface 113 and diffraction optical element 12.Light emission road
Diameter includes first light source propagation path P1 and second light source propagation path P2, and first light source propagation path P1 refers to 10 institute of laser
For the laser source of sending via incidence surface 111 toward the propagation path of reflecting surface 113, second light source propagation path P2 refers to reflecting surface
The laser source that 113 reflection lasers 10 are issued is via light-emitting surface 112 and the propagation path of past diffraction optical element 12.First light
There is angle, wherein angle is not 180 degree between source propagation path P1 and second light source propagation path P2.The first of the present embodiment
Light emission path is, for example, to be mutually perpendicular to second light source propagation path, and but not limited to this, allows and changes element by optical path
11 light source turns to.
Laser 10 can be the semiconductor laser of side-emitted, such as DFB (distributed feedback
Laser) laser.Diffraction optical element 12 includes optical substrate 121 and diffraction micro structural 122, and optical substrate 121, which has, receives light
Face 1211 and relative to the light-emitting surface 1212 for receiving smooth surface 1211, diffraction micro structural 122, which may be selected to be set to, receives smooth surface 1211 or hair
Smooth surface 1212.In the present embodiment, diffraction micro structural 122 is set to light-emitting surface 1212.Diffraction optical element 12 is, for example, to use
Etch process forms required diffraction micro structural 122 on 121 surface of optical substrate, although the diffraction micro structural 122 in Fig. 1
Be by with being alternatively arranged and for multiple protrusions with rectangular section, but diffraction micro structural 122 is not limited thereto, as long as
It can allow and multiple luminous points or pattern are copied by the light generation diffraction of diffraction optical element 12 and projected to determinand
On body, no longer it is described in detail in this.
When in use, laser 10 generates laser source to the optical projection apparatus 1 of the present embodiment, and laser source is along first light source
Propagation path P1 changes element 11 toward optical path and propagates, and is first transmitted through the first non-spherical structure 1111 of incidence surface 111, the first aspheric
First a calibration of laser source, the laser source through once correcting propagate to reflecting surface 113 to face structure 1111.The reflection warp of reflecting surface 113
The laser source once corrected, to change the direction of propagation of laser source, laser source through reflection is along second light source propagation path P2
It propagates.Laser source through reflection is pierced by from the second non-spherical structure 1121 of light-emitting surface 112, the second non-spherical structure 1,121 2 times
Correct laser source through reflection.Laser source through secondary correction is passed along second light source propagation path P2 toward diffraction optical element 12
It broadcasts, the laser source through secondary correction enters from the receipts smooth surface 1211 of optical substrate 121, and from the light-emitting surface of optical substrate 121
1212 issue, from light-emitting surface 1212 issue laser source diffraction is generated by diffraction micro structural 122, and formed multiple luminous points or
Structure light with specific pattern, and adjust the distribution of multiple luminous points or structure light.The optical projection apparatus 1 of the present embodiment
Be in optical path change element 11 incidence surface 111 and light-emitting surface 112 integrate alignment function, without the multiple of stacking are additionally arranged
Collimation lens, to reduce the height of optical projection apparatus 1 and reduce its manufacturing cost.
Collocation Fig. 2 to Fig. 6 illustrates other implementation kenels of optical projection apparatus below, and the optics of certain the utility model is thrown
The implementable kenel of image device is not limited.In Fig. 2 into Fig. 6, identical component is indicated or is omitted mark with identical label
Number indicate, just no longer repeated under.
Referring to Fig. 2, it is the schematic diagram of the optical projection apparatus of the utility model second embodiment；As shown, this
The optical projection apparatus 2 of embodiment and the optical projection apparatus 1 of above-described embodiment are similar, but main difference is between the two,
The receipts smooth surface 2211 of the optical substrate 221 of the diffraction optical element 22 of the present embodiment is additionally provided with third non-spherical structure 223, third
Non-spherical structure 223 and diffraction optical element 22 are opposite.The third non-spherical structure 223 of the present embodiment is that surface has micro-structure
Lens, usually using aspherical Fresnel Lenses.Laser source through secondary correction passes through the third for being set to and receiving smooth surface 2211
Non-spherical structure 223 is corrected three times, to ensure the optical imagery quality of optical projection apparatus 2.Third non-spherical structure 223
Focal length be, for example, to be greater than zero.In one embodiment, third non-spherical structure 223 and the commutative setting of diffraction micro structural 222, are changed
Sentence is talked about, and diffraction micro structural 222 is set to the receipts smooth surface 2211 of optical substrate 221, and third non-spherical structure 223 is set to optics
The light-emitting surface 2212 of substrate 221.
Referring to Fig. 3, it is the schematic diagram of the optical projection apparatus of the utility model 3rd embodiment；As shown, this
The optical projection apparatus 3 of embodiment and the optical projection apparatus 2 of second embodiment are similar, but difference is, the light of the present embodiment
Road, which changes, is equipped with collimation lens (collimator lens) 33 between element 31 and diffraction optical element 32, and collimation lens 33
In on second light source propagation path P2, and respectively correspond light-emitting surface 312 and diffraction optical element 32 that optical path changes element 31
Third non-spherical structure 323.In other words, first collimated lens 33 correct the laser source through the correction of the second non-spherical structure 3121
Laser source also illustrates that the laser of the optical projection apparatus 3 of the present embodiment using 323 calibration of laser source of third non-spherical structure
Source carries out four corrections by four optical textures, its optical imagery quality is made to meet demand.The focal length of above-mentioned collimation lens 33
Greater than zero.Certain the present embodiment can also omit the setting of third non-spherical structure 323, no longer be described in detail in this.Because optical path changes
The incidence surface 311 and light-emitting surface 312 of dependent element 31 can reach collimating effect respectively, even if the other setting collimation of the present embodiment is saturating
Mirror 33, but the quantity of collimation lens 33 is less than the quantity of collimation lens used in current optical projection apparatus.
Referring to Fig. 4, it is the schematic diagram of the optical projection apparatus of the utility model fourth embodiment；As shown, this
The optical projection apparatus 4 of embodiment and the optical projection apparatus 2 of second embodiment are similar, but difference is, the light of the present embodiment
The curvature that road changes the first non-spherical structure 4111 of element 41 is negative cruvature, and the focal length that optical path changes element 41 can be by above-mentioned
Formula (1) formula of embodiment calculates.In other embodiments, the optical path of first embodiment and 3rd embodiment change element can also
Element 41 is changed using the optical path of the present embodiment.
Referring to Fig. 5, it is the schematic diagram of the optical projection apparatus of the 5th embodiment of the utility model；As shown, this
The optical projection apparatus 5 of embodiment and the optical projection apparatus 2 of second embodiment are similar, but difference is, the light of the present embodiment
The curvature that road changes the second non-spherical structure 5121 of element 51 is negative cruvature, and the focal length that optical path changes element 51 can be by above-mentioned
Embodiment formula (1) formula calculates.In other embodiments, the optical path of first embodiment and 3rd embodiment changes element and can also adopt
Change element 51 with the optical path of the present embodiment.
Referring to Fig. 6, it is the schematic diagram of the optical projection apparatus of the utility model sixth embodiment；As shown, this
The optical projection apparatus 6 of embodiment and the optical projection apparatus 2 of second embodiment are similar, but difference is, the light of the present embodiment
It is negative cruvature that road, which changes the first non-spherical structure 6111 of element 61 and the curvature of the second non-spherical structure 6121,.Optical projection
The light source that device 6 uses can be source of parallel light, further to improve the situation of light source diverging, and improve efficiency.In the present embodiment
In, the focal length that optical path changes element 61 formula (1) formula can calculate through the foregoing embodiment, wherein F1 < 0.In other embodiments,
The optical path of first embodiment and 3rd embodiment, which changes element, can also be used the optical path change element 61 of the present embodiment.
Referring to Fig. 7, it is the schematic diagram of the electronic device of the 7th embodiment of the utility model；As shown, this is practical
Novel more to provide a kind of electronic device 7, electronic device 7 includes optical projection apparatus 71 and image acquisition module 72, for catching
Stereopsis is caught, wherein the optical projection apparatus using first embodiment to sixth embodiment may be selected in optical projection apparatus.Electricity
In in use, optical projection apparatus 71 is to light source of the projection of object 8 with specific pattern, image acquisition module 72 captures sub-device
The image information that light source is reflected by object.
The optical projection apparatus of right above-described embodiment by change incidence surface on element in optical path and light-emitting surface be equipped with it is non-
Spherical structure does not have to so additionally increase to entering optical path change element and being corrected from the light source that optical path changes element injection
Other optical mirror slips are collimated, are corrected, and are effectively reduced the height (being, for example, less than 10mm) of optical projection apparatus, are made electronic device
It can be towards lightening.
In conclusion the utility model provides a kind of optical projection apparatus and electronic device, optical projection apparatus will be current
Multiple collimation lenses of optical projection apparatus are integrated in the incidence surface and light-emitting surface that optical path changes element, reduce setting for collimation lens
Set, can not only maintain the optical property of optical projection apparatus, while reducing the height of optical projection apparatus, also reduce manufacture at
This.The optical projection apparatus of small size is applied in electronic device, electronic device is made to meet frivolous demand.
It should be noted that, in this document, the terms "include", "comprise" or its any other variant are intended to non-row
His property includes, so that the process, method, article or the device that include a series of elements not only include those elements, and
And further include other elements that are not explicitly listed, or further include for this process, method, article or device institute it is intrinsic
Element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that including being somebody's turn to do
There is also other identical elements in the process, method of element, article or device.
The embodiments of the present invention are described above in conjunction with attached drawing, but the utility model is not limited to
The specific embodiment stated, the above mentioned embodiment is only schematical, rather than restrictive, this field it is common
Technical staff is not departing from the utility model aims and scope of the claimed protection situation under the enlightenment of the utility model
Under, many forms can be also made, are belonged within the protection of the utility model.
Claims (15)
1. a kind of optical projection apparatus characterized by comprising
Optical path changes element, and with incidence surface, light-emitting surface and reflecting surface, the incidence surface and the light-emitting surface are at least within
One of have non-spherical structure；
Laser, the incidence surface that the optical path changes element are set between the reflecting surface and the laser；And
Diffraction optical element, the light-emitting surface that the optical path changes element are set to the reflecting surface and diffraction optics member
Between part；
Wherein light emission path of the reflecting surface between the laser and the diffraction optical element.
2. optical projection apparatus as described in claim 1, which is characterized in that the light emission path includes that first light source passes
Path and second light source propagation path are broadcast, the first light source propagation path is that the laser source that the laser is issued is past described
The propagation path of reflecting surface, the second light source propagation path are the laser sources through the reflective surface toward the diffraction
The propagation path of optical element has angle between the first light source propagation path and the second light source propagation path, and
The angle is not 180 degree.
3. optical projection apparatus as described in claim 1, which is characterized in that the incidence surface has the first non-spherical structure,
The light-emitting surface has the second non-spherical structure.
4. optical projection apparatus as claimed in claim 3, which is characterized in that the focal power that the optical path changes element is under
Formula is stated to calculate:
1/F1=(1/R1+1/R2) × (n-1)
Wherein the F1 is the focal length that the optical path changes element, and the R1 is the vertex curvature half of first non-spherical structure
Diameter, the R2 are the vertex curvature radius of second non-spherical structure, and the n is the material refraction that the optical path changes element
Rate.
5. optical projection apparatus as claimed in claim 4, which is characterized in that the focal length that the optical path changes element is greater than zero.
6. optical projection apparatus as claimed in claim 4, which is characterized in that the focal length that the optical path changes element is less than
20mm。
7. optical projection apparatus as claimed in claim 4, which is characterized in that the laser and the optical path change element
The distance between described incidence surface is between the one times of focal length and two times of focal lengths that the optical path changes element.
8. optical projection apparatus as claimed in claim 3, which is characterized in that first non-spherical structure and described second non-
At least one of curvature of spherical structure is positive camber.
9. optical projection apparatus as described in claim 1, which is characterized in that the diffraction optical element includes:
Optical substrate has and receives smooth surface and light-emitting surface；And
Diffraction micro structural is set to the light-emitting surface or the receipts smooth surface.
10. optical projection apparatus as claimed in claim 9, which is characterized in that it is non-that the diffraction optical element further includes third
Spherical structure, the third non-spherical structure are set to the receipts smooth surface or the light-emitting surface, and with the diffraction micro structural phase
It is right.
11. optical projection apparatus as claimed in claim 10, which is characterized in that the third non-spherical structure is that Fresnel is saturating
Mirror.
12. optical projection apparatus as claimed in claim 10, which is characterized in that the focal length of the third non-spherical structure is greater than
Zero.
13. such as optical projection apparatus of any of claims 1-12, which is characterized in that the optical path change element with
Collimation lens is equipped between the diffraction optical element.
14. optical projection apparatus as claimed in claim 13, which is characterized in that the focal length of the collimation lens is greater than zero.
15. a kind of electronic device characterized by comprising
Optical projection apparatus as described in any one of claim 1-14 has the light source of specific pattern to project objects；With
And
Image acquisition module captures the image information that the light source is reflected by the object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821540084.8U CN208673019U (en) | 2018-09-20 | 2018-09-20 | Optical projection apparatus and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821540084.8U CN208673019U (en) | 2018-09-20 | 2018-09-20 | Optical projection apparatus and electronic device |
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| Publication Number | Publication Date |
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| CN208673019U true CN208673019U (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821540084.8U Active CN208673019U (en) | 2018-09-20 | 2018-09-20 | Optical projection apparatus and electronic device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765430A (en) * | 2019-04-02 | 2020-10-13 | 宁波舜宇车载光学技术有限公司 | Free-form surface-based light projection device and application thereof |
-
2018
- 2018-09-20 CN CN201821540084.8U patent/CN208673019U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111765430A (en) * | 2019-04-02 | 2020-10-13 | 宁波舜宇车载光学技术有限公司 | Free-form surface-based light projection device and application thereof |
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