CN215573687U - A light detection assembly and laser device - Google Patents
A light detection assembly and laser device Download PDFInfo
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- CN215573687U CN215573687U CN202121195205.1U CN202121195205U CN215573687U CN 215573687 U CN215573687 U CN 215573687U CN 202121195205 U CN202121195205 U CN 202121195205U CN 215573687 U CN215573687 U CN 215573687U
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Abstract
The utility model provides a light detection assembly and a laser device. The light detection assembly includes: the laser device comprises a light splitting assembly and a light source, wherein the light splitting assembly comprises a light splitting surface and a light splitting emergent surface, and a partial reflection film is arranged on the light splitting surface so that when target laser is emitted to the light splitting surface, partial light beams in the target laser are reflected on the light splitting surface to be emitted from the light splitting emergent surface; and the focusing component is arranged on the light emitting side of the light splitting and emitting surface of the light splitting component and is used for focusing and emitting partial light beams emitted by the light splitting and emitting surface. The utility model can effectively improve the accuracy of judging the emitting state of the laser emitter for emitting the target laser.
Description
Technical Field
The utility model relates to the technical field of laser, in particular to a light detection assembly and a laser device.
Background
In the optical transmitter module, it is generally required to separate a part of light emitted from the laser chip to the optical detector, and the optical detector detects the part of light in real time, so as to implement real-time feedback of the optical power of the laser chip and monitor the working performance of the laser chip in real time. Generally, a light splitting operation is performed by using a light splitting glass slide which is obliquely assembled, but the operation cannot focus split light, so that the split light cannot completely reach a light detector, and the distribution of the light spot intensity in a light beam is unstable, so that the light intensity received by the light detector is also unstable, and erroneous judgment is easily caused to cause unstable work of a laser chip.
SUMMERY OF THE UTILITY MODEL
The utility model provides a light detection assembly and a laser device aiming at the defects of the prior art, and aims to solve the technical problem that an optical detector cannot receive all light beams reflected by a light splitting surface.
The technical scheme adopted by the utility model for solving the technical problems is as follows: provided is a light detection assembly comprising: the laser device comprises a light splitting assembly and a light splitting and emitting assembly, wherein the light splitting surface is provided with a partial reflection film, so that when target laser is emitted to the light splitting surface, partial light beams in the target laser are reflected on the light splitting surface to be emitted from the light splitting and emitting surface; and the focusing assembly is arranged on the light outgoing side of the light outgoing splitting surface of the light splitting assembly and used for focusing and then emitting the partial light beams emitted by the light outgoing splitting surface.
Wherein, spectral subassembly includes the spectral prism, the spectral bottom surface of spectral prism is provided with partial reflecting film, as spectral subassembly the light splitting face, in the spectral prism with one in two spectral rectangle side faces that the spectral bottom surface is connected is regarded as the light splitting face of spectral subassembly, the light splitting face perpendicular to the incident direction setting of target laser.
Wherein the other of the two light splitting rectangular side surfaces connected with the light splitting bottom surface in the light splitting triple prism is used as the light splitting and emitting surface of the light splitting component.
The light splitting component further comprises a light path steering component, the light path steering component comprises a reflecting surface, and the reflecting surface is located on the light emitting side of the other light splitting rectangular side surface of the light splitting triangular prism and used for changing the transmission direction of the partial light beams.
Wherein, the light path turns to the subassembly and includes turning to the prism, turn to the prism the bottom surface be greater than the prism another beam splitting rectangle side is located another beam splitting rectangle side of beam splitting rectangle side, turn to the bottom surface with the prism the region that another beam splitting rectangle side corresponds is used for receiving focus subassembly is emitted partial beam after focusing, turn to the remaining region of bottom surface as beam splitting subassembly divide the light emitting face, two that turn to the prism turn to the rectangle side and be provided with the total reflection rete, be used for the reflection follow turn to the bottom surface and incite to partial beam after focusing, so that partial beam after focusing follow turn to the bottom surface the remaining region is emitted.
The light splitting component further comprises a supporting prism, and the supporting prism is located below the light splitting triple prism and used for supporting the light splitting triple prism.
The support prism comprises a support surface, the support surface is attached to the light splitting bottom surface, and the partial reflection film is arranged on the support surface.
The light detection assembly further comprises a collimating lens, which is arranged on the light incident side of the light splitting incidence surface of the light splitting assembly and used for enabling the target laser to be injected into the incidence surface after collimation correction.
The light detection assembly further comprises a light detector, wherein the light detector is positioned on the light emitting side of the focusing assembly and used for receiving the focused partial light beam emitted by the focusing assembly so as to detect the power of the focused partial light beam.
The other technical scheme adopted by the utility model for solving the technical problem is as follows: a laser device comprising a laser emitter and a light detection assembly as described above.
The utility model has the advantages that compared with the prior art, the utility model focuses and emits partial light beams reflected by the light splitting surface, so that the light beams are received by the light detector after being focused, the area of the formed light spot is small, the light detector can receive all light rays of the reflected partial light beams, the emission power of the laser emitter for emitting target laser is accurately judged, and the loss caused by misjudgment is avoided.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic structural view of a first embodiment of a light detection assembly provided by the present invention;
FIG. 2 is a schematic structural view of a second embodiment of a light detection assembly provided by the present invention;
FIG. 3 is a schematic structural view of a third embodiment of a light detection assembly provided by the present invention;
FIG. 4 is a schematic structural diagram of a fourth embodiment of a light detection assembly provided by the present invention;
FIG. 5 is a schematic structural view of a fifth embodiment of a light detection assembly provided by the present invention;
FIG. 6 is a schematic structural diagram of a sixth embodiment of a light detection assembly provided by the present invention;
fig. 7 is a schematic structural diagram of an embodiment of a laser device provided by the present invention.
Detailed Description
The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a photodetection assembly according to a first embodiment of the present invention. The optical detection assembly 10 includes a light splitting assembly 11 and a focusing assembly 12, the light splitting assembly 11 is configured to split the target laser into at least two light beams emitted in different directions, and the focusing assembly 12 is configured to focus one of the light beams split by the light splitting assembly. In this embodiment, the spectroscopic assembly 11 includes a spectroscopic surface 111, and the spectroscopic surface 111 is provided with a partially reflective film so that when the target laser beam is incident on the spectroscopic surface 111, a part of the beam is reflected by the spectroscopic surface 111, and the rest of the beam is emitted through the spectroscopic surface 111. Focusing assembly 12 focuses on the partial light beam that divides light plane 111 reflection, and the light beam facula area after the focus that jets out is little, is more received by light detector is whole to can effectively promote the accuracy that light detector detected.
In this implementation scenario, the light splitting assembly 11 further includes a light splitting and emitting surface 112, a part of the light beam in the target laser is reflected by the light splitting surface 111 and then emitted from the light splitting and emitting surface 112, and the focusing assembly 12 is disposed on the light emitting side of the light splitting and emitting surface 112 of the light splitting assembly 11, and focuses the part of the light beam emitted from the light splitting and emitting surface 112.
In other implementation scenarios, the light detection assembly 10 further includes a light detector 13, and a light-sensitive surface of the light detector 13 is located on the light-emitting side of the focusing assembly 12 and is used for receiving the light beam emitted from the focusing assembly 12. The focused light beam emitted by the focusing assembly 12 has a small spot area and is more easily received by the optical detector 13. In this implementation scenario, the optical detector 13 determines the working stability of the laser emitter emitting the target laser according to the received spot intensity distribution, and since the area of the focused beam spot is small and the optical detector 13 can receive all the focused beams, the stability of the spot intensity can be accurately obtained, so as to accurately determine the working stability of the laser emitter emitting the target laser.
In the present implementation scenario, the splitting plane 111 and the horizontal plane form an included angle of 45 degrees, so that a part of the light beam reflected by the splitting plane 111 is emitted perpendicular to the horizontal plane, and in other implementation scenarios, the included angle between the splitting plane 111 and the horizontal plane is set according to actual requirements. The specific orientation of the splitting plane 111 can also be set according to the actual use requirement, for example, the orientation is determined according to the installation position of the photodetector 13. For example, when the photodetector 13 is mounted directly below the spectroscopic unit 11, the spectroscopic surface 111 is inclined downward by 45 °. When the photodetector 13 is mounted directly above the spectroscopic unit 11, the spectroscopic surface 111 is inclined upward by 45 °.
As can be seen from the above description, in this embodiment, the light detection assembly focuses on a part of the light beam reflected by the light splitting surface and then emits the focused light beam, so that the light beam received by the light detector is focused, the area of the formed light spot is small, and the light detector can receive all the light beams of the reflected part of the light beam, thereby accurately judging the emission power of the laser emitter emitting the target laser and avoiding the loss caused by misjudgment.
Referring to fig. 2, fig. 2 is a schematic structural diagram of an optical inspection assembly according to a second embodiment of the present invention. The light detection assembly 20 comprises a light splitting assembly 22 and a focusing assembly 21. The beam splitting element 22 includes a beam splitting prism 221, and the beam splitting prism 221 includes a beam splitting bottom surface 2211, a first beam splitting rectangular side surface 2212, and a second beam splitting rectangular side surface 2213. The first light splitting rectangular side surface 2212 and the second light splitting rectangular side surface 2213 are respectively connected to two ends of the light splitting bottom surface 2211. The light splitting bottom surface 2211 is provided with a partial reflection film as a light splitting surface of the light splitting assembly 21, the first light splitting rectangular side surface 2212 is used as a light splitting incidence surface of the light splitting assembly 21 and is used for incidence of the target laser light, and the first light splitting rectangular side surface 2212 is arranged perpendicular to the incidence direction of the target laser light. In this implementation scenario, the target laser is emitted in the horizontal direction, and the first split rectangular side 2212 is disposed in the vertical direction. The second light splitting rectangular side 2213 serves as a light splitting exit face of the light splitting assembly 21. In this embodiment, when the target laser beam enters the spectroscopic triangular prism 221 from the first spectroscopic rectangular side surface 2212 and reaches the spectroscopic bottom surface 2211, a part of the beam is reflected by the spectroscopic bottom surface 2211 and exits through the second spectroscopic rectangular side surface 2213, and the rest of the beam exits through the spectroscopic bottom surface 2211.
The focusing element 21 is disposed on the light exit side of the second light splitting rectangular side 2213, in this implementation scenario, the incident surface of the focusing element 21 is seamlessly bonded to the second light splitting rectangular side 2213, and the focused partial light beam exits from the second light splitting rectangular side 2213 and is focused by the focusing element 21.
It can be known from the above description that, utilize the beam splitting prism to carry out the beam splitting operation to target laser in this embodiment, some light beams are jetted out from beam splitting rectangle side of beam splitting prism after the beam splitting bottom surface reflection of beam splitting prism, focusing assembly jets out after focusing to some light beams that jet out, thereby what the photo detector received is through the light beam after focusing, the facula area that forms is little, the photo detector can receive the whole light of the partial light beam of reflection, thereby carry out accurate judgement to the transmitting power of the laser emitter who launches target laser, avoid because the loss that the erroneous judgement leads to.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a light inspection assembly according to a third embodiment of the present invention. The light detection assembly 30 comprises a light splitting assembly 32 and a focusing assembly 31. The light splitting component 32 includes a light splitting prism 321 and a light path turning component 322, and the light splitting prism 321 is basically the same as the light splitting prism 221 in the second embodiment of the light detection component provided by the present invention in structure and function, and is not described here again. The light path turning component 322 is located on the light emitting side of the second light splitting rectangular side surface 3213 of the light splitting prism 321, and is configured to change the transmission direction of the light beam emitted from the second light splitting rectangular side surface 3213.
In this implementation scenario, the light beam is emitted from the second light splitting rectangular side surface 3213 and then enters the reflective surface 3221 of the optical path turning component 322, and the reflective surface 3221 reflects all the light beam, thereby changing the transmission direction of the light beam. The incident surface of the focusing unit 31 is located in the emitting direction of the reflective surface 3221, and receives and focuses the light beam reflected by the reflective surface 3221 to emit the focused light beam.
It can be known from the above description that in this embodiment, the light-emitting side of another beam splitting rectangular side of beam splitting prism sets up the light path and turns to the subassembly, can change the transmission direction of the partial light beam that the beam splitting bottom surface reflects, and the position of photo-detector can be set up in a flexible way as required to can be suitable for more application scenarios.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a photodetecting assembly according to a fourth embodiment of the present invention. The light detection assembly 40 comprises a light splitting assembly 42 and a focusing assembly 41. The light splitting component 42 includes a light splitting prism 421 and a light path turning component 422, and the light splitting prism 421 is substantially identical to the light splitting prism 221 in the second embodiment of the light detection component provided by the present invention in structure and function, and is not described here again. The optical path turning assembly 422 includes an turning prism 4221. The turning bottom surface 42211 of the turning triple prism 4221 is larger than the second prismatic side surface 4213 of the prismatic prism 421, and the turning bottom surface 42211 is positioned on the light exit side of the second prismatic side surface 4213. 42212 and 42213 arranged on two rectangular sides of the turning prism 4221 and provided with total reflection film layers
The region 42211a of the deflecting bottom surface 42211 corresponding to the second diverging rectangular side surface 4213 is configured to receive the light beam emitted from the second diverging rectangular side surface 4213, and the light beam enters from the region 42211a, then enters the deflecting rectangular side surface 42212, is reflected by the deflecting rectangular side surface 42212, enters the deflecting rectangular side surface 42213, is reflected by the deflecting rectangular side surface 42213, and exits from the remaining region 42211b of the deflecting bottom surface 42211. In this embodiment, the residual region 42211b serves as an exit surface of the light splitting element 42. The light incident surface of the focusing element 41 is positioned on the light exit side of the extra region 42211b, and receives and focuses the light beam emitted from the extra region 42211b, and then emits the light beam.
It can be known from the above description that, in this embodiment, the area that turns to the bottom surface of turning to the prism and another beam splitting rectangle side of beam splitting prism corresponds is used for receiving the partial light beam after the focus that the focusing subassembly jetted out, two that turn to the prism turn to the rectangle side and are provided with the total reflection rete, be used for reflecting the partial light beam after the focus that kicks in from turning to the bottom surface, so that the partial light beam after the focus jets out from the remaining region that turns to the bottom surface, can change the transmission direction of the partial light beam that the beam splitting bottom surface reflects, the position of photo detector can be set up in a flexible way as required, thereby can be suitable for more application scenes.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a light inspection assembly according to a fifth embodiment of the present invention. The light detection assembly 50 comprises a light splitting assembly 52 and a focusing assembly 51. The splitting assembly 52 includes a splitting prism 521, a turning prism 522, and a support prism 523, and the support prism 523 is located below the splitting prism 521 to support the splitting prism 521 such that the first splitting rectangular side 5212 of the splitting prism 521 is in a state perpendicular to the emission direction of the target laser light.
In this implementation scenario, the supporting prism 523 is a trapezoidal prism, and the supporting rectangular inclined surface 5231 of the supporting prism 523 is attached to the bottom surface 5211 of the beam splitter prism 521, and has the same inclination angle, so that the supporting of the beam splitter prism 521 is already realized. In other implementation scenarios, since the supporting rectangular inclined surface 5231 is attached to the bottom surface 5211 of the beam splitter prism 521, a partially reflective film is disposed on the supporting rectangular inclined surface 5231, so that the function of reflecting a part of the light beam on the bottom surface 5211 and transmitting the rest of the light beam can be realized. In other embodiments, the support prism 523 may be a triangular prism or other prism, and only needs to have a rectangular inclined surface 5231 matching the light splitting bottom surface 5211.
The structure, position and function of the focusing assembly 51 are substantially the same as the focusing assembly 41 in the fourth embodiment of the optical detection assembly provided by the present invention, and will not be described herein again.
It can be known from the above description that in this embodiment, set up the support prism, be located the spectral prism below for support the spectral prism, can strengthen spectral assembly's stability, improve optical detection assembly's life.
Referring to fig. 6, fig. 6 is a schematic structural diagram of a photodetecting assembly according to a sixth embodiment of the present invention. The light detection assembly 60 includes a light splitting assembly 62, a focusing assembly 61, a collimating lens 63, and a light detector 64. The collimating lens 63 is disposed on the light incident side of the light splitting incident surface of the light splitting element 62, and is configured to collimate and correct the target laser light and then inject the collimated and corrected laser light into the incident surface. Light-splitting assembly 62 includes a light-splitting prism 621, a turning prism 622, and a support prism 623. In this embodiment, the beam splitting prism 621, the turning prism 622, the support prism 623 and the focusing assembly 61 are bonded together seamlessly, but in other embodiments, they may be bonded together seamlessly as needed
It can be known through the above-mentioned description that set up collimating lens in this embodiment and can effectively promote the collimation degree of the target laser who jets into beam splitting subassembly to the collimation nature of the light beam that beam splitting subassembly jetted out promotes, and the reliability of the facula that light detector received is higher, thereby promotes the accuracy of judging.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a laser device according to an embodiment of the present invention. The laser device 70 comprises a laser emitter 71 and a light detection assembly 72, wherein the light detection assembly 72 is the light detection assembly shown in any one of fig. 1-6. In the present implementation scenario, laser device 70 further includes a temperature controller 73 for controlling the internal temperature of laser device 70 to stabilize the operating state of laser transmitter 71.
As can be seen from the above description, the light detection assembly in the laser device in this embodiment focuses and emits a part of the light beam reflected by the light splitting surface, so that the light beam is received by the light detector after being focused, the area of the formed light spot is small, and the light detector can receive all the light rays of the reflected part of the light beam, thereby accurately determining the emission power of the laser emitter emitting the target laser and avoiding the loss caused by erroneous determination.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, but rather as embodying the utility model in all equivalent variations and modifications within the scope of the appended claims.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121195205.1U CN215573687U (en) | 2021-05-31 | 2021-05-31 | A light detection assembly and laser device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121195205.1U CN215573687U (en) | 2021-05-31 | 2021-05-31 | A light detection assembly and laser device |
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| CN215573687U true CN215573687U (en) | 2022-01-18 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690341A (en) * | 2022-03-18 | 2022-07-01 | 武汉光迅科技股份有限公司 | TO packaging structure with light incoming detection function and manufacturing method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114690341A (en) * | 2022-03-18 | 2022-07-01 | 武汉光迅科技股份有限公司 | TO packaging structure with light incoming detection function and manufacturing method thereof |
| CN114690341B (en) * | 2022-03-18 | 2023-04-14 | 武汉光迅科技股份有限公司 | A TO packaging structure with incoming light detection function and its manufacturing method |
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Address after: 518000 No. 35, Cuijing Road, Pingshan New District, Shenzhen, Guangdong Patentee after: Ona Technology (Shenzhen) Group Co.,Ltd. Address before: No.35 Cuijing Road, Pingshan District, Shenzhen City, Guangdong Province Patentee before: O-NET COMMUNICATIONS (SHENZHEN) Ltd. |