CN209417294U - A kind of photoelectric conversion module and optical ranging mould group - Google Patents
A kind of photoelectric conversion module and optical ranging mould group Download PDFInfo
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- CN209417294U CN209417294U CN201821499505.7U CN201821499505U CN209417294U CN 209417294 U CN209417294 U CN 209417294U CN 201821499505 U CN201821499505 U CN 201821499505U CN 209417294 U CN209417294 U CN 209417294U
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- photoelectric conversion
- optical detection
- transmission medium
- conversion module
- detection face
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Abstract
It includes the photoelectric conversion unit in the optical detection face that is provided with that the utility model embodiment, which provides a kind of photoelectric conversion module and optical distance measuring equipment, the photoelectric conversion module, for the optical signal being incident on the optical detection face to be converted into electric signal；And it is covered on the light transmission medium on the optical detection face and with the seamless contact in the optical detection face；Wherein, the refractive index of the light transmission medium is greater than 1, and the surface of the light transmission medium includes curved surface.The detectivity to light beam can be improved in the photoelectric conversion module.
Description
Technical field
The utility model relates to optical application technical field more particularly to a kind of photoelectric conversion modules and optical ranging mould
Group.
Background technique
The application scenarios such as height, avoidance, the industry neck such as security protection or rail traffic are determined in many application fields, such as unmanned plane
In domain, distance-measuring equipment can be applied to.Currently, using ligh-ranging method there are many kinds of, wherein be based on flight time (Time of
Flight, TOF) telemetry is using more one of method.Flight time telemetry includes the ranging of pulsed time difference and phase
Position formula ranging, the ranging of pulsed time difference be by measuring time for flying in space of laser pulse, using Dose times with
The light velocity is multiplied to obtain the distance of point-to-point transmission；Ranging phase method is transmitting light by measurement intensity Jing Guo Sine Modulated and by target
Phase difference between the return light being reflected back converts range information for phase difference and realizes range measurement, and ranging phase method is compared can
Obtain higher measurement accuracy.
The optical signal received is converted by telecommunications using photoelectric conversion module in the distance-measuring equipment using ligh-ranging
The calculating of number laggard row distance.However, when the light beam that distance-measuring equipment is emitted encounters farther away object and reflected, distance-measuring equipment institute
The optical signal received is fainter, causes photoelectric conversion module that the optical signal can not be converted into the electric signal that can be identified, this
Limit distance-measuring equipment can ranging range.
Utility model content
The utility model embodiment provides a kind of photoelectric conversion module, comprising:
The photoelectric conversion unit in the optical detection face of being provided with, for the optical signal being incident on the optical detection face to be converted into
Electric signal；
It is covered on the light transmission medium on the optical detection face and with the seamless contact in the optical detection face；
Wherein, the refractive index of the light transmission medium is greater than 1, and the surface of the light transmission medium includes curved surface.
Optionally, the refractive index of the light transmission medium is not less than 1.3.
Optionally, the light transmission medium is hemispherical, alternatively, the surface of the light transmission medium includes being located at the optical detection
Spherical zone shape curved surface right above face.
Optionally, the ratio of the radius of a ball of the light transmission medium and the bore in the optical detection face is not less than 1.5；
And/or
The ratio of the radius of a ball of light transmission medium and the bore in the optical detection face is not more than 50.
Optionally, the surface of the light transmission medium includes the first surface above the optical detection face, and described first
Curved surface is used to incident light beam converging to the optical detection face.
Optionally, the surface of the light transmission medium further includes the first plane positioned at the first surface periphery, Yi Jiwei
Toroidal reflective surface below first plane；
First plane is used to for incident beam being transmitted through the toroidal reflective surface, and the toroidal reflective surface is used for will
Incident light beam reflexes on the optical detection face.
Optionally, the light transmission medium includes first part, and for connecting the first part and the optical detection
The second part in face, the refractive index of the second part are greater than the refractive index of the first part.
Optionally, on the direction for being parallel to the optical detection face, the second part covers the optical detection face；
And/or
The ratio of the refractive index of the second part and the refractive index of the first part is not more than 1.4.
Optionally, it is PMMA between 1.3 to 1.5, the second part packet that the first part, which includes refractive index,
Include silica gel of the refractive index between 1.4 to 1.6.
Optionally, the thickness of the second part is not more than 0.2 millimeter.
The utility model embodiment additionally provides a kind of optical ranging mould group, comprising:
Optical transmitting set, for being emitted the light pulse sequence through ovennodulation；
Beam shaping, for being emitted after carrying out shaping to the light pulse sequence；
Optical receiver, including photoelectric conversion module described in any of the above embodiments, for receiving the light pulse sequence through object
At least partly return light that body is reflected back determines institute according to the phase difference of the light pulse sequence and at least partly return light
State the distance between optical ranging mould group and the object.
As can be seen from the above technical solutions, the utility model embodiment has the advantage that
Since the etendue of the receivable light beam in optical detection face is E=A*n2*sin(θ)2, wherein A is optical detection face
Area, n be optical detection face surrounding medium refractive index.In the case where incident light beam is constant, optical detection face is receivable
Etendue is bigger, it is meant that the receivable light energy in optical detection face is more, and signal strength is also bigger.The utility model
In, the light transmission medium for being greater than 1 and surface at least partially curved surface by the way that refractive index is arranged on the surface of optical detection face can be improved
The received etendue of optical detection face institute.In the case that area in optical detection face remains unchanged, optical detection face can be improved
Received light energy in unit area, and then photoelectric conversion module is improved to the detectivity of light beam.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of one embodiment of photoelectric conversion module provided by the embodiment of the utility model；
Fig. 2 is the structural schematic diagram of another embodiment of photoelectric conversion module provided by the embodiment of the utility model；
Fig. 3 is the structural schematic diagram of another embodiment of photoelectric conversion module provided by the embodiment of the utility model；
Fig. 4 is the structural schematic diagram of another embodiment of photoelectric conversion module provided by the embodiment of the utility model；
Fig. 5 is the structural schematic diagram of another embodiment of photoelectric conversion module provided by the embodiment of the utility model；
Fig. 6 is the structural schematic diagram of another embodiment of photoelectric conversion module provided by the embodiment of the utility model；
Fig. 7 is the structural schematic diagram of another embodiment of photoelectric conversion module provided by the embodiment of the utility model；
Fig. 8 is the structural schematic diagram of one embodiment of optical ranging mould group provided by the embodiment of the utility model.
Specific embodiment
In order to make those skilled in the art better understand the scheme of the utility model, below in conjunction with the utility model reality
The attached drawing in example is applied, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that described
Embodiment is only the embodiment of the utility model a part, instead of all the embodiments.Based on the reality in the utility model
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is all answered
When the range for belonging to the utility model protection.
The specification and claims of the utility model and term " first ", " second ", " third " in above-mentioned attached drawing
" 4th " etc. is not use to describe a particular order for distinguishing different objects.In addition, term " includes " and " having " with
And their any deformations, it is intended that cover and non-exclusive include.Such as contain the process of a series of steps or units, side
Method, system, product or equipment are not limited to listed step or unit, but optionally further comprising the step of not listing
Or unit, or optionally further comprising other step or units intrinsic for these process, methods, product or equipment.
As shown in FIG. 1, FIG. 1 is the structures of one embodiment of photoelectric conversion module provided by the embodiment of the utility model to show
It is intended to.Photoelectric conversion module 10 includes photoelectric conversion unit 11 and the light transmission medium 12 being arranged on photoelectric conversion unit 11.
Wherein, optical detection face 111 is provided on the photoelectric conversion unit 11, photoelectric conversion unit 11 will be for that will be incident to the optical detection face
Optical signal on 111 is converted into electric signal.Light transmission medium 12 be arranged on optical detection face 111, and with the seamless company in optical detection face 111
It connects.The refractive index of the light transmission medium 12 is greater than 1, and at least partially curved surface on the surface of the light transmission medium 12.Optionally, light transmission
The refractive index of medium 12 is not less than 1.3.Optionally, the light transmittance of light transmission medium 12 is greater than 85%.
Since the etendue of the receivable light beam in optical detection face 111 is E=A*n2*sin(θ)2, wherein A is light spy
The area in survey face 111, n are the refractive index of 111 surrounding medium of optical detection face.In the case where incident light beam is constant, optical detection
The receivable etendue in face 111 is bigger, it is meant that the receivable light energy in optical detection face 111 is more, and signal strength is also
It is bigger.In the utility model, it is greater than 1 and surface at least partially curved surface by the way that refractive index is arranged on 111 surface of optical detection face
Light transmission medium 12, the received etendue of the institute of optical detection face 111 can be improved.Area in optical detection face 111 is kept not
In the case where change, light energy received in 111 unit area of optical detection face can be improved, and then improve photoelectric conversion module
To the detectivity of light beam.In the distance-measuring equipment using the photoelectric conversion module, surveying for the distance-measuring equipment can also be expanded
Away from range.
In some implementations, light transmission medium 12 may include silica gel, epoxy resin, organic plastics, glass or other
Refractive index is greater than 1 translucent material.
The concrete shape structure of light transmission medium 12 can there are many, citing description is carried out to some of which below.
In some implementations, as shown in Figure 1, light transmission medium 12 is specific hemispherical.In some practical applications, light
It is additionally provided with plus lens in the light incident direction of electric conversion module 10, for converging incident light beam (such as collimated light beam)
To optical detection face 111.In this way, when being incident to optical detection face 111 by light transmission medium 12 through plus lens converging beam, the light beam
Optical path do not changed by light transmission medium 12, or the degree changed by light transmission medium 12 is smaller.Optionally, the hemispheroidal ball
The ratio of radius and the bore in optical detection face 111 is not less than 1.5.Optionally, the hemispheroidal radius of a ball and optical detection face 111
The ratio of bore is not more than 50.Wherein, the bore in the optical detection face 111 can refer to the maximum caliber in the optical detection face 111, or
Person's lowest calibre perhaps average value of the average calibre on the direction of part or all bores, herein with no restrictions.
As shown in Fig. 2, Fig. 2 is the structure of another embodiment of photoelectric conversion module provided by the embodiment of the utility model
Schematic diagram.In the present embodiment, light transmission medium 22 is specifically in remaining knot behind the parallel plane interception two sides of one and half ball warp two
The surface of structure body namely light transmission medium 22 packet is located at the spherical zone shape curved surface 221 right above optical detection face, and is located at the curved surface two
Side, two planes 222 and 223 being approximately perpendicular to 21 surface of photoelectric conversion unit.Optionally, where the light transmission medium 22
The ratio of the hemispheroidal radius of a ball and the bore in optical detection face 211 is not less than 1.5.Optionally, half where the light transmission medium 22
The ratio of the radius of a ball of sphere and the bore in optical detection face 211 is not more than 50.Wherein, the bore in the optical detection face 211 can be
Refer to the maximum caliber in the optical detection face 211 perhaps lowest calibre perhaps average calibre or all bores on the direction of part
Average value, herein with no restrictions.
In some implementations, light transmission medium 22 can be converged incident light beam.
For example, in the case where being additionally provided with plus lens in the light incident direction of photoelectric conversion module, through plus lens
The light beam converged is converged again through the light transmission medium and is incident on optical detection face after being incident to light transmission medium.Such as Fig. 3
Shown, Fig. 3 is the structural schematic diagram of another embodiment of photoelectric conversion module provided by the embodiment of the utility model.Light transmission is situated between
The surface of matter 32 includes the first surface 321 positioned at 311 top of optical detection face, and the first surface 321 is used for will be incident
Converging beam converged again, and be incident to the optical detection face 311.The beam angle converged through first surface 321 is big
Beam angle (shown in dotted line) before the convergence of this curved surface.In this way it is less than the spot size converged through first surface 321 to converge
Convergence hot spot before poly- increases the optical power density of convergence hot spot.In one example, the surface of the light transmission medium 32 can be with
It is spherical surface.In one example, the surface of the light transmission medium 32 is bigger than the curvature on the surface of convex lens, alternatively, the light transmission is situated between
The surface of matter 32 is also possible to free form surface, herein with no restrictions.
Optionally, the surface of the light transmission medium 32 i.e. first surface 321, first surface extends always similar to ellipsoid
To the surface of photoelectric conversion unit 11.
Optionally, as shown in figure 4, the surface of light transmission medium 32 further include surround first surface 321 the conical surface 322 (or
Cylinder), which extends to the surface of photoelectric conversion unit 31.
In some practical applications, it can also be not provided in the light incident direction of photoelectric conversion module for by incident light
Beam convergence to photoelectric conversion module plus lens, but pass through to be located at optical detection face above light transmission medium surface carry out
Design, so that light transmission medium converges to incident light beam on optical detection face.
As shown in figure 5, Fig. 5 is the structure of another embodiment of photoelectric conversion module provided by the embodiment of the utility model
Schematic diagram.The surface of light transmission medium 52 includes the first surface 521 positioned at 511 top of optical detection face, which is used for
Incident light beam is converged into optical detection face 511.For example, when incident light beam is directional light (or close to directional light), optical detection
Face 511 is located on the focal plane on the surface of light transmission medium 52, and light transmission medium 52 is used for incident directional light (or close to parallel
Light) it converges on optical detection face 511.Wherein, the surface of the light transmission medium 52 can be spherical surface, alternatively, the light transmission medium 52
Surface is also possible to free form surface, herein with no restrictions.
Optionally, the surface of light transmission medium 52 further includes the conical surface 522 (or cylinder) for surrounding first surface 521, the cone
Face 522 (or cylinder) extends to the surface of photoelectric conversion unit 51.
Optionally, as shown in fig. 6, Fig. 6 is another implementation of photoelectric conversion module provided by the embodiment of the utility model
The structural schematic diagram of example.The surface of light transmission medium 62 further includes the first positioned at 521 periphery of first surface, annular in shape plane
622, and the toroidal reflective surface 623 positioned at 622 lower section of the first plane.Specifically, the toroidal reflective surface 623 is from the first plane
Periphery extend to the surface of photoelectric conversion unit 61.The overall direction along the optical detection face that is parallel to of first plane 622 extends, or
The angle in person and optical detection face is less than 5 degree.First plane 622 is used to incident beam being transmitted through toroidal reflective surface 623, should
Toroidal reflective surface 623 is used to incident light beam reflexing to optical detection face 611.
Optionally, when the incident light of light transmission medium 62 is directional light (or close to directional light), the first plane 622 does not change
The direction of propagation of incident light, or it is smaller to the change degree of the direction of propagation of incident light.Across the incident light of the first plane 622
It is directly transmitted in toroidal reflective surface 623, optical detection face 611 is then reflexed to by toroidal reflective surface 623.Optionally, the annular
Reflecting surface 623 can be the conical surface extended downwardly, be also possible to the convex surface extended downwardly, herein with no restrictions.
In some implementations, light transmission medium can only include a kind of medium of refractive index.
In some implementations, light transmission medium also may include the medium of at least two refractive index.As shown in fig. 7, Fig. 7 is
The structural schematic diagram of another embodiment of photoelectric conversion module provided by the embodiment of the utility model.Light transmission medium 72 includes the
A part 721, and be filled between first part 721 and optical detection face 711, for connecting first part 721 and optical detection
The second part 722 in face 711.Wherein, the refractive index of second part 722 is greater than the refractive index of first part 721.It can keep away in this way
Exempt from light beam in the interface experiences total internal reflection of second part 722 and first part 721.
Optionally, the refractive index of first part 721 is in the refractive index close of second part 722.For example, second part 722
Refractive index and first part 721 refractive index ratio be not more than 1.4.Optionally, it is position that first part 721, which includes refractive index,
Polymethyl methacrylate (Poly (methyl methacrylate), PMMA) between 1.3 to 1.5, second part 722
Silica gel including refractive index between 1.4 to 1.6.For example, first part 721 is the PMMA that refractive index is 1.49.For example, the
Two parts 722 are the silica gel that refractive index is 1.54.
Optionally, the thickness of second part 722 is less than 0.2 millimeter.Wherein, the thickness of the second part 722 can be to
The maximum gauge of second part 722 perhaps put down by the minimum thickness of second part 722 or at least part of of second part 722
Equal thickness, herein with no restrictions.
As shown in figure 8, the structure that Fig. 8 is one embodiment of optical ranging mould group provided by the embodiment of the utility model is shown
It is intended to.Optical ranging mould group 80 includes optical transmitting set 81, beam shaping 82 and optical receiver 83.Optical transmitting set 81 is for being emitted
Light pulse sequence through ovennodulation.Each light pulse that beam shaping 72 is used to be emitted optical transmitting set 81 carries out shaping.
Optionally, which is used for so that the angle of divergence of the light pulse being emitted in a first direction is greater than in a second direction
N times of the angle of divergence.
It is reflected or diffusing reflection when the pulsed light in the light pulse sequence encounters object by the object.The pulsed light is through the object
At least partly return light after body reflection or diffusing reflection returns to optical ranging mould group 80 along original optical path, by optical ranging mould
Optical receiver 83 in group 80 is received.Optical receiver 83 is used for according to the phase between the pulsed light and the return light received
Difference, to determine the orientation of the distance between object and optical ranging mould group 80 and object opposing optical ranging mould group 80.
Specifically, optical receiver 83 includes photoelectric conversion module and computing module, wherein the photoelectric conversion module be can be
Any one photoelectric conversion module described above.The photoelectric conversion module is used to incident light beam changing into electric signal,
The computing module is used to obtain the phase of the return light from the electric signal, and the pulse of outgoing is obtained from optical transmitting set 81
The phase of light, and object and optics are calculated based on the phase difference between the phase of the return light and the phase of the pulsed light of outgoing
The distance between ranging mould group 80.In some implementations, convergence is additionally provided with above the optical detection face of optical receiver 82 thoroughly
Mirror 84, for converging the light beam of return, the light beam of the convergence is incident on optical detection face after passing through light transmission medium.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
The above, above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；Although ginseng
The utility model is described in detail according to previous embodiment, those skilled in the art should understand that: it is still
It is possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is equally replaced
It changes；And these are modified or replaceed, various embodiments of the utility model technical solution that it does not separate the essence of the corresponding technical solution
Spirit and scope.
Claims (12)
1. a kind of photoelectric conversion module characterized by comprising
The photoelectric conversion unit in the optical detection face of being provided with, for the optical signal being incident on the optical detection face to be converted into telecommunications
Number；
It is covered on the light transmission medium on the optical detection face and with the seamless contact in the optical detection face；
Wherein, the refractive index of the light transmission medium is greater than 1, and the surface of the light transmission medium includes curved surface.
2. photoelectric conversion module according to claim 1, which is characterized in that the refractive index of the light transmission medium is not less than
1.3。
3. photoelectric conversion module according to claim 1, which is characterized in that the light transmission medium is hemispherical, alternatively, institute
The surface for stating light transmission medium includes the spherical zone shape curved surface being located at right above the optical detection face.
4. photoelectric conversion module according to claim 3, which is characterized in that the radius of a ball of the light transmission medium and the light
The ratio of the bore of test surface is not less than 1.5；
And/or
The ratio of the radius of a ball of light transmission medium and the bore in the optical detection face is not more than 50.
5. photoelectric conversion module according to claim 1, which is characterized in that the surface of the light transmission medium includes being located at institute
First surface above the optical detection face of stating, the first surface are used to incident light beam converging to the optical detection face.
6. photoelectric conversion module according to claim 5, which is characterized in that the surface of the light transmission medium further includes being located at
First plane of the first surface periphery, and the toroidal reflective surface below first plane；
First plane is used to for incident beam being transmitted through the toroidal reflective surface, and the toroidal reflective surface is used for will be incident
Light beam reflex on the optical detection face.
7. photoelectric conversion module according to claim 1, which is characterized in that the light transmission medium includes first part, with
And the second part for connecting the first part and the optical detection face.
8. photoelectric conversion module according to claim 7, which is characterized in that the refractive index of the second part is greater than described
The refractive index of first part.
9. photoelectric conversion module according to claim 7, which is characterized in that in the direction for being parallel to the optical detection face
On, the second part covers the optical detection face；
And/or
The ratio of the refractive index of the second part and the refractive index of the first part is not more than 1.4.
10. photoelectric conversion module according to claim 7, which is characterized in that the first part includes that refractive index is position
Polymetylmethacrylate between 1.3 to 1.5, the second part include refractive index between 1.4 to 1.6
Silica gel.
11. photoelectric conversion module according to claim 7, which is characterized in that the thickness of the second part is not more than 0.2
Millimeter.
12. a kind of optical ranging mould group characterized by comprising
Optical transmitting set, for being emitted the light pulse sequence through ovennodulation；
Beam shaping, for being emitted after carrying out shaping to the light pulse sequence；
Optical receiver, including photoelectric conversion module as described in any one of claim 1 to 10, for receiving the light pulse sequence
At least partly return light being reflected back through object is arranged, according to the phase difference of the light pulse sequence and at least partly return light
Determine the distance between the optical ranging mould group and the object.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821499505.7U CN209417294U (en) | 2018-09-13 | 2018-09-13 | A kind of photoelectric conversion module and optical ranging mould group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821499505.7U CN209417294U (en) | 2018-09-13 | 2018-09-13 | A kind of photoelectric conversion module and optical ranging mould group |
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| Publication Number | Publication Date |
|---|---|
| CN209417294U true CN209417294U (en) | 2019-09-20 |
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|---|---|---|---|
| CN201821499505.7U Expired - Fee Related CN209417294U (en) | 2018-09-13 | 2018-09-13 | A kind of photoelectric conversion module and optical ranging mould group |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413944A (en) * | 2022-03-29 | 2022-04-29 | 安徽省国盛量子科技有限公司 | Distributed optical fiber sensor based on quantum dots |
-
2018
- 2018-09-13 CN CN201821499505.7U patent/CN209417294U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114413944A (en) * | 2022-03-29 | 2022-04-29 | 安徽省国盛量子科技有限公司 | Distributed optical fiber sensor based on quantum dots |
| CN114413944B (en) * | 2022-03-29 | 2022-06-21 | 安徽省国盛量子科技有限公司 | Distributed optical fiber sensor based on quantum dots |
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