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CN-121995350-A - Calibration method and device of optical transceiver module and storage medium

CN121995350ACN 121995350 ACN121995350 ACN 121995350ACN-121995350-A

Abstract

The application discloses a calibration method and device of an optical transceiver module and a storage medium, and belongs to the technical field of radars. According to the technical scheme provided by the embodiment of the application, the first light beam and the second light beam which are parallel to each other are used for actively adjusting the reflecting mirror in the optical transceiver module, and the accuracy of the posture adjustment of the reflecting mirror is improved by utilizing the multi-information provided by the light spots of the first light beam and the second light beam in the collimator, so that the accuracy of the detection by using the optical transceiver module subsequently is improved.

Inventors

  • Peng Zhibai

Assignees

  • 深圳市速腾聚创科技有限公司

Dates

Publication Date
20260508
Application Date
20241101

Claims (14)

  1. 1. The calibration method of the reflector in the optical transceiver module is characterized in that the optical transceiver module comprises a receiving optical system, and the receiving optical system comprises a first lens, a reflector and a second lens which are sequentially arranged along a receiving light path; The calibration method is applied to a light modulation device, the light modulation device comprises a light source module and a first collimator, the light source module is used for providing a first light beam and a second light beam which are parallel to each other, the first collimator is used for receiving the first light beam and the second light beam which are emitted through the second lens, and the calibration method comprises the following steps: The optical transceiver module is arranged at a first preset position; The light source module is arranged on the light inlet side of the receiving optical system, so that the first light beam and the second light beam are symmetrical about a first optical axis on the upstream of a light path of the receiving optical system, wherein the first optical axis is the optical axis of the first lens; The first collimator is arranged on the light emitting side of the receiving optical system so that the light beam emitted by the first collimator through the second optical axis can be incident to the first collimator along the third optical axis, wherein the second optical axis is the optical axis of the second lens, the third optical axis is the optical axis of the first collimator, and And adjusting the reflecting mirror so that the symmetrical centers of the light spots of the first light beam and the second light beam in the first collimator are positioned in a preset distance range of the center of the imaging element of the collimator.
  2. 2. The method according to claim 1, wherein the optical transceiver module includes an emission optical system, a beam splitter and a receiving optical system, the beam splitter has a first side, a transceiver side and a second side, the beam splitter is configured to emit a light beam incident from the first side through the transceiver side, the light beam incident from the transceiver side emits through the second side, the emission optical system is disposed on the first side of the beam splitter, and the receiving optical system is disposed on the second side of the beam splitter; The mounting the light source module on the light incident side of the receiving optical system includes: and installing the light source module on the receiving and transmitting side of the beam splitter.
  3. 3. The calibration method according to claim 2, wherein the light source module comprises a first light source, a second light source and a first light splitting prism, and the light modulation device further comprises a second parallel light pipe; the mounting the light source module on the light incident side of the receiving optical system so that the first light beam and the second light beam are symmetrical about a first optical axis at an optical path upstream of the receiving optical system includes: the first light source is arranged on the receiving and transmitting side of the beam splitter, the second parallel light pipe is arranged on the light entering side of the emission optical system, so that the first light beam, the optical axis of the emission optical system and a fourth optical axis coincide, wherein the fourth optical axis is the optical axis of the second parallel light pipe; The first beam splitting prism is arranged between the first light source and the beam splitting mirror, and the propagation direction of the first light beam is maintained unchanged; Mounting the second light source on a third side of the first beam splitter prism to coincide the second light beam with the first light beam at the spot of the second collimator, and Adjusting the first light source and the second light source so that the first light beam and the second light beam are symmetrical about the first optical axis when they are incident on the receiving optical system; the first beam splitter prism is provided with a first side facing the first light source, a second side facing the beam splitter and a third side facing the second light source.
  4. 4. A calibration method according to claim 3, wherein the light modulation device further comprises a target plate; Before the step of adjusting the first light source and the second light source so that the first light beam and the second light beam are symmetrical about the first optical axis when they are incident on the receiving optical system, the step of mounting the light source module on the light incident side of the receiving optical system so that the first light beam and the second light beam are symmetrical about the first optical axis upstream of the optical path of the receiving optical system, further includes: Placing the target plate on a fourth side of the first beam splitter prism, wherein the fourth side and the third side are opposite sides; And adjusting the second light source and/or the first light splitting prism so as to enable the first light beam to coincide with a light spot formed by the target plate of the second light source.
  5. 5. A calibration method according to claim 3, wherein the adjusting the first and second light sources such that the first and second light beams are symmetrical about the first optical axis when they are incident on the receiving optical system comprises: controlling the first light source to move a first distance along a first direction, and Controlling the second light source to move the first distance along a second direction; The first direction is a direction perpendicular to the first plane, the first plane is a plane determined by an optical axis of the emission optical system and the first optical axis, and the second direction is opposite to the first direction.
  6. 6. A method of calibrating according to claim 3, wherein the light modulating device further comprises a light path deflecting element for changing the propagation direction of the light beam; the mounting the first collimator on the light-emitting side of the receiving optical system so that the first collimator is configured such that a light beam emitted via the second optical axis can be incident on the first collimator along the third optical axis, includes: taking down the optical transceiver module; The light path deflection element is arranged on a light path of the first light beam and the second light beam, which are shot to the first preset position, so that the light spots of the first light beam and the second light beam on the first collimator are overlapped; moving the second collimator to a position where the fourth optical axis coincides with the second optical axis, and And a second beam splitting prism is arranged between the light path deflection element and the first collimator, and the first light beam and the second light beam are overlapped at the light spot of the second collimator.
  7. 7. The method according to claim 6, wherein the step of mounting the second beam splitter prism between the optical path deflecting element and the first collimator so that the first light beam coincides with the second light beam at a spot of the first collimator and the first light beam coincides with the second light beam at a spot of the second collimator, the step of mounting the first collimator on an outgoing side of the receiving optical system so that the light beam emitted from the first collimator via the second optical axis is incident on the first collimator along a third optical axis, further comprises: removing the optical path deflecting element, and And installing the optical transceiver module at the first preset position.
  8. 8. The method of calibrating according to claim 1, wherein adjusting the mirror so that the center of symmetry of the first and second light beams in the spot of the first collimator is within a predetermined distance of the center of the imaging element of the collimator comprises: determining whether the center of symmetry is within a predetermined distance of the center of the imaging element, and If the symmetry center is not located in the preset distance range of the center of the imaging element, controlling the reflector to rotate around the first rotation axis and the second rotation axis so that the symmetry center is located in the preset distance range of the center of the imaging element of the collimator; Wherein the first rotation axis and the second rotation axis are parallel to the reflecting mirror before the reflecting mirror rotates, respectively, and the first rotation axis intersects with the second rotation axis.
  9. 9. The method of calibration according to claim 8, the calibration method is characterized by further comprising the following steps: if the symmetry center is located in the preset distance range of the center of the imaging element, determining whether the distance between the first light beam and the second light beam at the light spot of the first collimator is in the preset distance range or not, and If the distance is not within the preset distance range, moving the reflecting mirror along a preset translation direction so that the distance is within the preset distance range; Wherein the preset translation direction is perpendicular to the reflector before the reflector rotates.
  10. 10. The method of calibrating according to claim 9, wherein after the step of moving the mirror in a predetermined translational direction such that the pitch is within a predetermined distance interval, the method further comprises: Checking whether the center of symmetry is within a predetermined distance of the center of the imaging element, and And returning to the step of rotating the control mirror around the first rotation axis and the second rotation axis so that the symmetry center is located within the preset distance range of the center of the imaging element of the collimator if the symmetry center is not located within the preset distance range of the center of the imaging element.
  11. 11. The calibration method according to claim 1, characterized in that the calibration method further comprises: And if the symmetry center is within a preset distance range of the center of the imaging element, and the distance between the first light beam and the second light beam at the light spot of the first collimator is within a preset distance range, fixing the reflecting mirror on the shell of the optical transceiver module.
  12. 12. The calibrating device of the optical transceiver module is characterized by comprising a receiving optical system, wherein the receiving optical system comprises a first lens, a reflecting mirror and a second lens which are sequentially arranged along a receiving light path, the calibrating device belongs to an optical adjusting device, the optical adjusting device comprises a light source module and a first collimator, the light source module is used for providing a first light beam and a second light beam which are parallel to each other, the first collimator is used for receiving the first light beam and the second light beam which are emitted through the second lens, and the calibrating device comprises: the first installation module is used for installing the optical transceiver module at a first preset position; A second mounting module, configured to mount the light source module on an incident side of the receiving optical system, so that the first light beam and the second light beam are symmetrical about a first optical axis upstream of an optical path of the receiving optical system, where the first optical axis is an optical axis of the first lens; A third mounting module for mounting the first collimator on the light-emitting side of the receiving optical system so that the first collimator is configured such that a light beam emitted via a second optical axis, which is an optical axis of the second lens, can be incident on the first collimator along a third optical axis, which is an optical axis of the first collimator, and And the adjusting module is used for adjusting the reflecting mirror so that the symmetrical centers of the light spots of the first light beam and the second light beam in the first collimator are positioned in a preset distance range of the center of the imaging element of the collimator.
  13. 13. A light modulation device comprising one or more processors and one or more memories, wherein the one or more memories store at least one computer program, the computer program being loaded and executed by the one or more processors to implement the method of calibrating an optical transceiver module according to any of claims 1 to 11.
  14. 14. A computer readable storage medium, wherein at least one computer program is stored in the computer readable storage medium, and the computer program is loaded and executed by a processor to implement the method for calibrating an optical transceiver module according to any of claims 1 to 11.

Description

Calibration method and device of optical transceiver module and storage medium Technical Field The present application relates to the field of radar technologies, and in particular, to a method and an apparatus for calibrating an optical transceiver module, and a storage medium. Background With the demands of miniaturization and light weight design of intelligent sensors, the design scheme of a folding optical path system is generally one of important implementation modes for compressing the size of a product, and the effect of a reflecting mirror on the folding optical path system is important, so that the positioning of the reflecting mirror in the folding optical path system is very important. Disclosure of Invention The embodiment of the application provides a calibration method, a calibration device and a storage medium of an optical transceiver module, which can improve the positioning precision of a reflector in a receiving optical module, and has the following technical scheme: In one aspect, a calibration method of an optical transceiver module is provided, the optical transceiver module includes a receiving optical system, the receiving optical system includes a first lens, a reflecting mirror and a second lens sequentially arranged along a receiving optical path; The calibration method is applied to a light modulation device, the light modulation device comprises a light source module and a first collimator, the light source module is used for providing a first light beam and a second light beam which are parallel to each other, the first collimator is used for receiving the first light beam and the second light beam which are emitted through the second lens, and the calibration method comprises the following steps: The optical transceiver module is arranged at a first preset position; The light source module is arranged on the light inlet side of the receiving optical system, so that the first light beam and the second light beam are symmetrical about a first optical axis on the upstream of a light path of the receiving optical system, wherein the first optical axis is the optical axis of the first lens; The first collimator is arranged on the light emitting side of the receiving optical system so that the light beam emitted by the first collimator through the second optical axis can be incident to the first collimator along the third optical axis, wherein the second optical axis is the optical axis of the second lens, the third optical axis is the optical axis of the first collimator, and And adjusting the reflecting mirror so that the symmetrical centers of the light spots of the first light beam and the second light beam in the first collimator are positioned in a preset distance range of the center of the imaging element of the collimator. In one aspect, a calibration device of an optical transceiver module is provided, the optical transceiver module includes a receiving optical system, the receiving optical system includes a first lens, a reflecting mirror and a second lens sequentially arranged along a receiving optical path, the calibration device belongs to an optical adjustment device, the optical adjustment device includes a light source module and a first collimator, the light source module is used for providing a first light beam and a second light beam parallel to each other, the first collimator is used for receiving the first light beam and the second light beam emitted by the second lens, and the calibration device includes: the first installation module is used for installing the optical transceiver module at a first preset position; A second mounting module, configured to mount the light source module on an incident side of the receiving optical system, so that the first light beam and the second light beam are symmetrical about a first optical axis upstream of an optical path of the receiving optical system, where the first optical axis is an optical axis of the first lens; A third mounting module for mounting the first collimator on the light-emitting side of the receiving optical system so that the first collimator is configured such that a light beam emitted via a second optical axis, which is an optical axis of the second lens, can be incident on the first collimator along a third optical axis, which is an optical axis of the first collimator, and And the adjusting module is used for adjusting the reflecting mirror so that the symmetrical centers of the light spots of the first light beam and the second light beam in the first collimator are positioned in a preset distance range of the center of the imaging element of the collimator. In one possible implementation manner, the optical transceiver module includes an emission optical system, a beam splitter and a receiving optical system, the beam splitter has a first side, a receiving side and a second side, the beam splitter is configured to emit a light beam incident from the first side through the receiving side, the ligh