CN210894692U - Anti-ambient light interference structure, light receiving device and laser radar system - Google Patents
Anti-ambient light interference structure, light receiving device and laser radar system Download PDFInfo
- Publication number
- CN210894692U CN210894692U CN201921520536.0U CN201921520536U CN210894692U CN 210894692 U CN210894692 U CN 210894692U CN 201921520536 U CN201921520536 U CN 201921520536U CN 210894692 U CN210894692 U CN 210894692U
- Authority
- CN
- China
- Prior art keywords
- light
- shield
- interference
- ambient light
- pass filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The embodiment of the utility model discloses anti ambient light interference structure, light receiving device and laser radar system. The structure for resisting the ambient light interference comprises a light shield, wherein the light shield is provided with at least two light through holes; and the all-pass filter is arranged on one side of the lens hood and is used for transmitting the light of the signal light wave band and blocking the light outside the signal light wave band. The embodiment of the utility model provides an anti environment light interference structure can be arranged in laser radar system, and the light-sensitive surface that leads to the unthreaded hole that sets up on the light shield is relative with photoelectric detector, and the light that reflects back from the target object is received by photoelectric detector after passing through light filter and leading to the unthreaded hole entirely, leads to the part outside the unthreaded hole and can not the printing opacity, realizes possessing simple structure, advantage with low costs to the blockking of environment interference light.
Description
Technical Field
The embodiment of the utility model provides an embodiment relates to the laser radar technique, especially relates to an anti ambient light interference structure, light receiving arrangement and laser radar system.
Background
The ambient light interference resisting structure is an optical structure for filtering out ambient light and other interference light and selecting signal light of a required radiation waveband, and is widely applied to some devices for acquiring information by light, such as a camera device and a laser radar system.
The existing structure for resisting ambient light interference applied to the laser radar system needs to let signal light pass through at the position corresponding to the photoelectric detector, but the position not corresponding to the photoelectric detector is generally some stray light such as ambient light. In the prior art, two films are generally plated on the optical filter, one is an antireflection film, and the other is a cut-off film, so that some special treatment is required on the manufacturing process, and the process of the structure for resisting the ambient light interference is complex and the cost is relatively high.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides an anti ambient light interference structure, light receiving device and laser radar system are provided, this anti ambient light interference structure possesses higher interference killing feature, and possesses simple structure, advantage with low costs.
In a first aspect, an embodiment of the present invention provides an anti-ambient light interference structure, including:
the light shield is provided with at least two light through holes;
and the all-pass filter is arranged on one side of the lens hood and is used for transmitting light rays of the signal light wave band and blocking light rays outside the signal light wave band.
Optionally, the all-pass filter is disposed on the light incident side or the light emergent side of the light-passing hole.
Optionally, the all-pass filter and the light shield are fixedly bonded by an optical cement.
Optionally, the light shield is a metal shield.
Optionally, the metal shielding can includes a copper shielding can or a copper alloy shielding can.
Optionally, the copper alloy shielding case is a zinc-copper-nickel shielding case, a nickel-copper-nickel shielding case or a zinc-nickel-copper-nickel shielding case.
Optionally, the light shield is an all-optical cut-off filter.
Optionally, one side of the all-pass filter is plated with an antireflection film.
In a second aspect, the embodiment of the present invention further provides a light receiving device, which is used in a laser radar system, including any one of the above-mentioned anti-ambient light interference structures, and further includes:
and the light sensing surface of the photoelectric detector is opposite to the light through hole of the light shield.
The embodiment of the utility model provides a still provide a laser radar system, including above-mentioned light receiving arrangement.
The utility model provides an anti ambient light interference structure, including the lens hood, the lens hood is provided with at least two clear apertures; and the all-pass filter is arranged on one side of the lens hood and is used for transmitting the light of the signal light wave band and blocking the light outside the signal light wave band. The anti environment light interference structure that this embodiment provided can be arranged in laser radar system, and the logical unthreaded hole that sets up on the light shield is relative with photoelectric detector's photosurface, is received by photoelectric detector after passing through light filter and logical unthreaded hole completely from the signal light that the target object reflects, and the part outside the logical unthreaded hole can not the printing opacity, realizes blockking of environment interference light, possesses simple structure, advantage with low costs.
Drawings
Fig. 1 is a schematic top view of an ambient light interference resisting structure according to an embodiment of the present invention;
FIG. 2 is a schematic cross-sectional view taken along line A-A' of FIG. 1;
fig. 3 is a schematic top view of another structure for resisting ambient light interference according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view taken along line B-B' of FIG. 3;
FIG. 5 is a schematic view of another cross-sectional structure taken along the line A-A' in FIG. 1;
FIG. 6 is a schematic view of a further cross-sectional configuration taken along line A-A' of FIG. 1;
fig. 7 is a schematic structural diagram of a light receiving device according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. It should be noted that the terms "upper", "lower", "left", "right", and the like used in the embodiments of the present invention are described in terms of the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element. The terms "first," "second," and the like, are used for descriptive purposes only and not for purposes of limitation, and do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Fig. 1 is a schematic top view of an ambient light interference resisting structure according to an embodiment of the present invention, and fig. 2 is a schematic cross-sectional view along a sectional line a-a' of fig. 1. Referring to fig. 1 and fig. 2, an embodiment of the present invention provides an anti-ambient light interference structure, including: the light shield 10, the light shield 10 has at least two light through holes 11; and an all-pass filter 20 disposed on one side of the light shield 10 for transmitting light in the signal light band and blocking light outside the signal light band.
It is understood that the structure for resisting ambient light interference provided by this embodiment may be used in a receiving apparatus of a laser radar system, and signal light is transmitted through the light-passing hole 11 provided on the light shield 10, and ambient light interference is blocked by other parts. An all-pass filter means that the entire filter area can transmit signal light (for example, 905nm infrared light) and block ambient light outside the wavelength of the signal light. Optionally, the all-pass filter 20 is disposed on the light incident side or the light emergent side of the light-passing hole 11.
It should be noted that, the position of the all-pass filter 20 on the light incident side (right side in fig. 2) of the light-passing hole 11 in the ambient light interference resisting structure shown in fig. 2 is only schematic, in other embodiments, the positions of the light-shielding cover 10 and the all-pass filter 20 may be interchanged, for example, fig. 3 is a schematic top view structure diagram of another ambient light interference resisting structure provided by an embodiment of the present invention, and fig. 4 is a schematic cross-sectional structure diagram along a cross-sectional line B-B' in fig. 3. Referring to fig. 3 and 4, the all pass filter 20 is located the light-emitting side that leads to unthreaded hole 11, and when being arranged in laser radar system, the light that the target object reflected back passes through lens hood 10 earlier and passes through all pass filter 20 again, can set up according to actual demand during concrete implementation, the embodiment of the utility model provides a do not do the restriction to this.
The arrangement of the light holes 11 in a row shown in fig. 1 to 4 is only illustrative, and in other embodiments, the light holes 11 may be arranged in other arrangements, which is not limited by the embodiment of the present invention.
The anti ambient light interference structure that this embodiment provided can be arranged in laser radar system, and the logical unthreaded hole that sets up on the light shield is relative with photoelectric detector's photosurface, is received by photoelectric detector after passing through light filter and logical unthreaded hole completely from the signal light that the target object reflects, and the part outside the logical unthreaded hole can not the printing opacity, realizes the suppression to ambient light, possesses simple structure, advantage with low costs.
On the basis of the above embodiment, fig. 5 is another schematic cross-sectional structure along the cross-sectional line a-a' in fig. 1. Referring to fig. 5, optionally, the all-pass filter 20 is fixedly bonded to the light shield 10 by an optical adhesive 30.
It can be understood that the stability of the structure against the interference of the ambient light can be improved by fixedly bonding the all-pass filter 20 and the light shield 10 by the optical glue 30. In a specific implementation, the optical cement 30 may be made of a transparent material, and further, referring to fig. 5, the optical cement 30 at the position of the light-passing hole 11 may be removed in the implementation, so as to prevent the optical cement 30 from absorbing light to cause signal attenuation.
Alternatively, the light shield 10 may be a metal shield.
It can be understood that the embodiment of the present invention provides an anti-ambient light interference structure, when using, can be connected with some circuit devices, for example, when being applied to a laser radar system, the laser radar system can include circuit structures such as a circuit board and various driving circuits, these circuit structures can also result in some electromagnetic fields causing interference, and the light shield 10 can also play a certain anti-electromagnetic interference effect by adopting a metal shielding cover.
Alternatively, the metal shield can may be a copper shield or a copper alloy shield. Optionally, the copper alloy shielding can may be a zinc-copper-nickel shielding can, a nickel-copper-nickel shielding can, or a zinc-nickel-copper shielding can. The zinc white copper, the nickel white copper or the zinc-nickel white copper have good electromagnetic interference resistance, and can be flexibly selected according to actual requirements during specific implementation.
Alternatively, the light shield 10 may be a full light cut filter. The all-optical cut-off filter can shield all-band light from ultraviolet light to infrared light, and has good environment light interference resistance.
Fig. 6 is a schematic cross-sectional view taken along line a-a' of fig. 1. Optionally, one side of the all-pass filter 20 is coated with an antireflection film 40. The anti-reflection film 40 can increase the light transmittance of the light carrying the signal to be measured, for example, when the emission device adopts a 1550nm light source, one side of the all-pass filter 20 can be plated with the anti-reflection film 40 with a 1550nm waveband, so that the transmittance of the light carrying the signal to be measured is improved, and the performance of the anti-ambient light interference structure is improved.
Fig. 7 is a schematic structural diagram of a light receiving device according to an embodiment of the present invention. Referring to fig. 7, the embodiment of the present invention provides a light receiving device for use in a laser radar system, including any one of the structures 1 for resisting ambient light interference provided by the above embodiments, further including: the light sensing surface of the photoelectric detector 2 is arranged opposite to the light through hole 11 of the light shield 10.
Wherein, the photodetector 2 can be an avalanche photodiode APD, and the embodiment of the present invention is not limited.
The embodiment of the utility model provides a provide light receiving device can be arranged in laser radar system, can effectively realize anti ambient light interference, and has simple structure, advantage with low costs.
The embodiment of the utility model provides a still provide a laser radar system, including the light receiving arrangement that above-mentioned embodiment provided. The laser radar has good capability of resisting ambient light interference, and has the advantages of simple structure and low cost.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. An ambient light interference resistant structure, comprising:
the light shield is provided with at least two light through holes;
and the all-pass filter is arranged on one side of the lens hood and is used for transmitting light rays of the signal light wave band and blocking light rays outside the signal light wave band.
2. The structure of claim 1, wherein the all-pass filter is disposed on the light incident side or the light emergent side of the light-passing hole.
3. The structure of claim 1, wherein the all-pass filter is fixedly bonded to the light shield by an optical adhesive.
4. The ambient light interference resistant structure of claim 1 wherein the light shield is a metal shield.
5. The ambient light interference resistant structure according to claim 4, wherein the metal shield is a copper shield or a copper alloy shield.
6. The ambient light interference resistant structure of claim 5, wherein the copper alloy shield is a zinc white copper shield, a nickel white copper shield or a zinc nickel white copper shield.
7. The structure of claim 1, wherein the light shield is a full light cut-off filter.
8. The structure of claim 1, wherein one side of the all-pass filter is coated with an antireflection film.
9. A light receiving device, for use in a lidar system, comprising the structure for resisting ambient light interference according to any one of claims 1 to 8, and further comprising:
and the light sensing surface of the photoelectric detector is opposite to the light through hole of the light shield.
10. A lidar system characterized by comprising the light-receiving device according to claim 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921520536.0U CN210894692U (en) | 2019-09-12 | 2019-09-12 | Anti-ambient light interference structure, light receiving device and laser radar system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921520536.0U CN210894692U (en) | 2019-09-12 | 2019-09-12 | Anti-ambient light interference structure, light receiving device and laser radar system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210894692U true CN210894692U (en) | 2020-06-30 |
Family
ID=71339809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921520536.0U Active CN210894692U (en) | 2019-09-12 | 2019-09-12 | Anti-ambient light interference structure, light receiving device and laser radar system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210894692U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731419A (en) * | 2020-12-23 | 2021-04-30 | 河南中原光电测控技术有限公司 | Distance measuring instrument, distance measuring equipment for measuring plate cutting length, filtering method and application |
-
2019
- 2019-09-12 CN CN201921520536.0U patent/CN210894692U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112731419A (en) * | 2020-12-23 | 2021-04-30 | 河南中原光电测控技术有限公司 | Distance measuring instrument, distance measuring equipment for measuring plate cutting length, filtering method and application |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110088768A (en) | Shield lower fingerprint identification device and electronic equipment | |
| IL265562B2 (en) | Optical system for collecting distance information within a field | |
| KR101013826B1 (en) | Imaging filter | |
| KR100255908B1 (en) | Photographing optical system | |
| US11598909B2 (en) | LiDAR window integrated optical filter | |
| DE102014002788A1 (en) | Multifunctional optical micro-sensor system | |
| CN209496385U (en) | Shield lower fingerprint identification device and electronic equipment | |
| EP2288943A2 (en) | Light barrier and method for detecting objects | |
| CN210894692U (en) | Anti-ambient light interference structure, light receiving device and laser radar system | |
| EP1921677A1 (en) | Light shield for a back illuminated light-detecting element and corresponding device | |
| US9720132B2 (en) | Illumination for the detection of raindrops on a window by means of a camera | |
| WO2021126058A1 (en) | Biometric imaging device and electronic device | |
| US20150289424A1 (en) | Grid Topography For Patterned Semiconductor Coating That Minimizes Optical Scatter And Obscuration | |
| AU2017330180B2 (en) | Optical system for collecting distance information within a field | |
| CN216774842U (en) | Prism, camera module and electronic equipment | |
| DE202014005479U1 (en) | optics carrier | |
| CN210776001U (en) | Optical imaging system, image capturing device and electronic equipment | |
| CN114008688A (en) | Biometric imaging apparatus and electronic apparatus | |
| CN219800879U (en) | Narrow-band-pass avalanche photodiode | |
| RU59848U1 (en) | MONITORING SYSTEM | |
| CN211905841U (en) | Camera lens | |
| US20230280514A1 (en) | Retroreflection defeat filter | |
| JP3907542B2 (en) | Optical communication module | |
| CN211787124U (en) | Biometric imaging apparatus and electronic apparatus | |
| CN217544628U (en) | Infrared photoelectric detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |