CN104977725A - Optical system for photoelectric pod - Google Patents
Optical system for photoelectric pod Download PDFInfo
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- CN104977725A CN104977725A CN201510366902.1A CN201510366902A CN104977725A CN 104977725 A CN104977725 A CN 104977725A CN 201510366902 A CN201510366902 A CN 201510366902A CN 104977725 A CN104977725 A CN 104977725A
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/28—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising
- G02B27/283—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00 for polarising used for beam splitting or combining
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
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- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses an optical system for a photoelectric pod. The optical system comprises a laser common aperture system and a signal transmitting and receiving system, wherein the laser common aperture system transmits light which passes through a first polarization splitting prism to the signal transmitting and receiving system, and the signal transmitting and receiving system is used for performing passive detection on received visible light and infrared light and transmitting echo signals which are formed by light that has irradiated the surface of a target to the first polarization splitting prism; the optical system further comprises an echo receiving system which is arranged on a reflecting optical light of the echo signals which are reflected along the first polarization splitting prism; the echo receiving system includes a second half wave plate and a second polarizing beam splitting prism which are arranged sequentially; a laser ranging detector is arranged on the transmission optical axis of the second polarizing beam splitting prism; and a laser angle tracking detector is arranged on the reflection optical axis of the second polarizing beam splitting prism. With the optical system for the photoelectric pod of the invention adopted, the influence of the back-scattered noises of the optical system can be effectively eliminated, and the detection accuracy of the system can be improved.
Description
Technical field
The present invention relates to optical system noise and eliminate field, especially, relate to a kind of optical system for photoelectric nacelle.
Background technology
Along with the development of science and technology, photoelectric nacelle presents the development trend of miniaturization, lightweight and multifunction, this just requires that the optical system in gondola has high integration and high detection performance, and multispectral section of Shared aperture technology can be good at resolution system miniaturization and this contradiction of multifunction, become the technical way of advanced optics gondola.Multispectral section of Shared aperture, as visible light wave range, infrared band and laser share reception and transmitting that a bore realizes visible light signal, infrared signal and laser signal.Wherein, visible ray and infrared band subsystem are passive detection, and laser subsystem is active probe, and namely laser subsystem Emission Lasers illumination beam is to target, and receive the laser energy be reflected back by target, realize the function of range finding and angle tracking.Like this, the laser backscatter noise that optical element surface produces in Shared aperture optical system can produce the detection performance of laser subsystem and have a strong impact on, and even causes system not work.Therefore, in Shared aperture system, the technology of laser subsystem elimination back scattering noise becomes one of gordian technique realizing Shared aperture system.
At present, the laser subsystem in photoelectric nacelle mainly realizes laser and irradiates, finds range and angle tracking function.Therefore, three optical axises are comprised in laser subsystem: laser irradiation optical axis, laser ranging optical axis, laser angular follow the tracks of optical axis.Latter two optical axis is unified is echo signal reception optical axis.The light path form realizing three optical axis Shared aperture mainly comprises: the method for (1) applications distances gating, the time come and gone between system, target according to laser pulse is different from the laser instrument transponder pulse cycle, the echo-pulse that laser radiation pulses and target reflect is separated, makes laser radiation pulses and echo-pulse share same bore and be independent of each other; (2) method of aperture segmentation is applied, make laser radiation pulses through the center of system aperture, and echoed signal pulse is via the peripheral aperture of system, the echo-pulse that laser radiation pulses and target reflect is separated, makes laser radiation pulses and echo-pulse share same bore and be independent of each other.
Back scattering noise in laser subsystem can enter into detector together along with the echoed signal of target reflection, thus reduces the detection performance of system.But although the first form can back scattering noise in effectively suppression system, when adopting this form, system bulk is comparatively large and the bandwidth of system is less, can not meet photoelectric nacelle miniaturization and bandwidth requirement; Adopt the second form, when system is when vibrating in larger environment, laser irradiation optical axis and mirror center hole cannot keep coaxial the moment, reduce range finding and tracking accuracy.
Summary of the invention
The invention provides a kind of optical system for photoelectric nacelle, the technical matters that the detection accuracy being difficult to effectively suppress to cause with the back scattering noise solving existing Shared aperture system laser subsystem is low.
The technical solution used in the present invention is as follows:
For an optical system for photoelectric nacelle, optical system comprises: laser Shared aperture system, signal launching and receiving system;
Laser Shared aperture system comprises the laser instrument, the first half-wave plate, the polarizer, Glan-Taylor prism, beam expanding lens, the first polarization splitting prism that set gradually along laser irradiation axis, through the light of the first polarization splitting prism transmission to signal launching and receiving system
Signal launching and receiving system is used for the visible ray received and infrared light are carried out to passive detection and be emitted to the first polarization splitting prism by being irradiated to the echoed signal after target surface;
Optical system also comprises: be arranged on the echo reception system on reflected light path that echoed signal reflects along the first polarization splitting prism, echo reception system comprises the second half-wave plate, the second polarization splitting prism that set gradually, the transmission optical axis of the second polarization splitting prism is arranged laser ranging detector, the reflection optical axis of the second polarization splitting prism is arranged laser angular tracking detector.
Further, laser instrument generates linearly polarized laser bundle, and the first half-wave plate is used for the polarization direction of linearly polarized laser bundle to rotate the laser beam making it to become and be parallel to the vibration of laser irradiation axis.
Further, the extinction ratio of Glan-Taylor prism is greater than 10
5: 1.
Further, the extinction ratio of the first polarization splitting prism is greater than 10
4: 1.
Further, signal launching and receiving system comprises the Signal reception subsystem for carrying out passive detection to the visible ray received and infrared light, laser beam is passed to off-axis reflection telescopic system, pendulum mirror system successively through Signal reception subsystem, point to target surface by pendulum mirror system, and echoed signal is passed to the first polarization splitting prism through pendulum mirror system, off-axis reflection telescopic system, Signal reception subsystem successively.
Further, Signal reception subsystem comprises:
First spectroscope, is located on the transmitted light path of the first polarization splitting prism, for transmitted infrared light and reflect visible light and laser beam,
Second spectroscope, is located in first spectroscopical transmitting light path, for visible light transmissive and reflection lasering beam,
Catoptron, is located on the reflected light path of the second reflective mirror, for by laser beam reflection to off-axis reflection telescopic system.
Further, Signal reception subsystem also comprises:
Near infrared imaging detector, is located on first spectroscopical transmitted light path, for carrying out passive detection to infrared light;
Visual light imaging detector, is located on second spectroscopical transmitted light path, for carrying out passive detection to visible ray.
Further, the parallel flat surface in off-axis reflection telescopic system is coated with the anti-reflection film for improving laser beam transmission rate.
The present invention has following beneficial effect:
The present invention is used for the optical system of photoelectric nacelle, by arranging in the first polarization splitting prism and echo reception system in laser Shared aperture system, the second polarization splitting prism is set, utilize the principle of polarization spectro, polarization state according to laser radiation pulses is different from the echo-pulse polarization state that target reflects, the echo-pulse that laser radiation pulses and target reflect is separated, laser radiation pulses and echo-pulse is made to share same bore and be independent of each other, and compared with the method in range gating, adopt the present invention effectively can reduce system complexity, avoid introducing extra mechanical vibration error, system process noise velocity is fast, to the change strong adaptability of detection range, is with roomy, the impact of effective elimination system back scattering noise, improves the detection accuracy of system.
Except object described above, feature and advantage, the present invention also has other object, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the preferred embodiment of the present invention for the optical system of photoelectric nacelle;
Fig. 2 is the structural representation of preferred embodiment of the present invention laser Shared aperture system and echo reception system;
Fig. 3 is the structural representation of Signal reception subsystem in the preferred embodiment of the present invention;
Fig. 4 is that in the preferred embodiment of the present invention, back scattering noise eliminates principle schematic.
Description of reference numerals:
10, laser Shared aperture system;
11, laser instrument; 12, the first half-wave plate;
13, the polarizer; 14, Glan-Taylor prism; 15, beam expanding lens; 16, the first polarization splitting prism;
17, the second half-wave plate; 18, the second polarization splitting prism; 19, laser ranging detector;
20, laser angular tracking detector;
110, signal launching and receiving system;
30, Signal reception subsystem; 31, the first spectroscope;
32, the second spectroscope; 33, catoptron;
40, off-axis reflection telescopic system;
50, mirror system is put.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
The preferred embodiments of the present invention provide a kind of optical system for photoelectric nacelle, and this optical system need meet high integration and high detection performance requirement, thus meet the development trend of photoelectric nacelle miniaturization, lightweight and multifunction.With reference to Fig. 1 and Fig. 2, the present embodiment optical system comprises: laser Shared aperture system 10, signal launching and receiving system 110; Wherein, laser Shared aperture system 10 comprises laser instrument 11, first half-wave plate 12, the polarizer 13, Glan-Taylor prism 14, beam expanding lens 15, first polarization splitting prism 16 that set gradually along laser irradiation axis, through the light of the first polarization splitting prism 16 transmission to signal launching and receiving system 110; Signal launching and receiving system 110 is for carrying out passive detection to the visible ray received and infrared light and be emitted to the first polarization splitting prism 16 by being irradiated to the echoed signal after target surface; This optical system also comprises: be arranged on the echo reception system on reflected light path that echoed signal reflects along the first polarization splitting prism 16, echo reception system comprises the second half-wave plate 17, second polarization splitting prism 18 set gradually, the reflection optical axis transmission optical axis of the second polarization splitting prism 18 being arranged laser ranging detector 19, second polarization splitting prism 18 arranges laser angular tracking detector 20.
The course of work of the present embodiment optical system is as follows:
Laser Shared aperture system 10 part, laser instrument 11 produces the linear polarized beam of wavelength X, pulse repetition rate, and the polarization direction of laser pulse, through the first half-wave plate 12, is rotated to be the laser beam becoming and be parallel to the vibration of laser irradiation axis by laser beam.Postrotational linearly polarized light, through the polarizer 13 and Glan-Taylor prism 14, improves the linear polarization degree of laser beam.Linearly polarized light incides the first polarization splitting prism 16 after beam expanding lens 15 expands, and all transmissions, incide signal launching and receiving system 110 and point to target.The laser echo signal reflected incides the first polarization splitting prism 16, and incides the second half-wave plate 17 after reflection.Echoed signal polarization state is changed by the second half-wave plate 17, signal pulse is all transmitted to laser ranging detector 19 through the second polarization splitting prism 18 or all reflexes to laser angular tracking detector 20, also or simultaneously transmittance and reflectance part energy, then received by laser ranging detector 19 and laser angular tracking detector 20 respectively.
The present embodiment arranges the second polarization splitting prism 18 by arranging in the first polarization splitting prism 16 and echo reception system in laser Shared aperture system, utilize the principle of polarization spectro, polarization state according to laser radiation pulses is different from the echo-pulse polarization state that target reflects, the echo-pulse that laser radiation pulses and target reflect is separated, laser radiation pulses and echo-pulse is made to share same bore and be independent of each other, and compared with the method in range gating, adopt the present invention effectively can reduce system complexity, avoid introducing extra mechanical vibration error; System process noise velocity is fast, to the change strong adaptability of detection range, is with roomy; The impact of effective elimination system back scattering noise, improves the detection accuracy of system.
With reference to Fig. 1 and Fig. 3, alternatively, signal launching and receiving system 110 comprises the Signal reception subsystem 30 for carrying out passive detection to the visible ray received and infrared light, laser beam is passed to off-axis reflection telescopic system 40, pendulum mirror system 50 successively through Signal reception subsystem 30, point to target surface by pendulum mirror system 50, and echoed signal is passed to the first polarization splitting prism 16 through pendulum mirror system 50, off-axis reflection telescopic system 40, Signal reception subsystem 30 successively.Preferably, with reference to Fig. 3, Signal reception subsystem 30 comprises: the first spectroscope 31, is located on the transmitted light path of the first polarization splitting prism 16, for transmitted infrared light and reflect visible light and laser beam; Second spectroscope 32, is located in the transmitting light path of the first spectroscope 31, for visible light transmissive and reflection lasering beam; Catoptron 33, is located on the reflected light path of the second reflective mirror, for by laser beam reflection to off-axis reflection telescopic system 40.Signal reception subsystem 30 also comprises: near infrared imaging detector, is located on the transmitted light path of the first spectroscope 31, for carrying out passive detection to infrared light; Visual light imaging detector, is located on the transmitted light path of the second spectroscope 32, for carrying out passive detection to visible ray.
In a preferred embodiment, laser instrument 11 produces the linearly polarized laser bundle that wavelength is λ, pulse repetition rate 20HZ, pulsewidth 10ns, first the Laser Beam Polarization direction anglec of rotation is made it become the P light being parallel to plane of incidence vibration through the first half-wave plate 12, because in the linearly polarized light that laser instrument 11 sends, fevering sodium effect occurs for some, linearly polarized laser bundle, through the polarizer 13 and Glan-Taylor prism 14, improves the linear polarization degree of laser beam.The laser beam having a high-polarization after beam expanding lens 15 expands all in first polarization splitting prism 16 place's transmission, and the first spectroscope 31 incided in Signal reception subsystem 30, be irradiated to target surface through the second spectroscope 32, catoptron 33, off-axis reflection telescopic system 40 and pendulum mirror system 50 subsequently; Due to the impact by target surface roughness and air etc., all there is oscillating component in all directions in the echoed signal be reflected back by target.Therefore echoed signal is successively when overswing mirror system 50, off-axis reflection telescopic system 40, Signal reception subsystem 30 enter into laser Shared aperture system 10, at the first polarization splitting prism 16 place, S component in signal all reflects and enters echo signal reception system, and through the second half-wave plate 17 whirling vibration direction, by the second polarization splitting prism 18 transmittance and reflectance, received by range finding and angle tracking detector 19,20 respectively; When laser illumination beam incides in telescopic system 40, because the transmitance of optical element surface rete in telescopic system and reflectivity can not arrive 100%, therefore in element surface fraction of laser light energy generation back scattering, and incide laser Shared aperture system 10 along catoptron 33, second spectroscope 32 and the first spectroscope 31.As shown in Figure 4, occur in backward scattered pulsed laser energy, P component 22 is all then reflected by the first polarization splitting prism 16 through the first polarization splitting prism 16, S component 21 and enters into echo signal reception light path, has an impact to acquisition of signal.Because the polarization state of back scattering noise does not change, the degree of polarization of laser radiation pulses is very high, make the S component 21 in back scattering laser pulse very little, and P component 22 is in the first whole transmission in polarization splitting prism 16 place, thus the detection of laser echo signal is not had an impact.
Preferably, in order to meet, the illumination of remote target is detected, the linearly polarized laser pulse that laser instrument 11 produces wavelength, pulse repetition rate is 20HZ, pulsewidth is 10ns, monopulse peak energy is greater than 40mJ.
Preferably, in order to improve the utilization factor of laser energy, laser instrument is sent the linear polarization anglec of rotation of light beam by the first half-wave plate 12, makes it to become the P light being parallel to plane of incidence vibration, all transmitted through the first polarization splitting prism 16.
Preferably, in order to the back scattering noise in reduction system, the present embodiment off-axis reflection telescopic system 40 is selected from axle four anti-without burnt telescopic system, and parallel flat surface is wherein coated with anti-reflection film, to laser wavelength transmissivity.
Preferably, in order to ensure that back scattering noise has very high degree of polarization, the extinction ratio of Glan-Taylor prism 14 is greater than 10
5: 1; In order to ensure that back scattering noise has very high degree of polarization, the extinction ratio of the first polarization splitting prism 16 is greater than 10
4: 1.The degree of polarization of Emission Lasers bundle is improved by Glan-Taylor prism 14 and the first polarization splitting prism 16, thus improve the degree of polarization of back scattering noise, reduce vertical vibration S component 21 in back scattering noise, can eliminate lower than the minimum detection threshold of laser ranging detector 19 and some tracking detector 20 impact that back scattering noise detects echoed signal.
When the back scattering noise with high-polarization is through catoptron 33, second spectroscope 32 and the first spectroscope 31 and when inciding the first polarization splitting prism 16 along light path 23, as shown in Figure 4.Back scattering noise is made up of 21 and 22 two oscillating components, and the P component 22 vibrated in the horizontal direction enters into Laser emission light path 25 through the first polarization splitting prism 16; S component 21 perpendicular to horizontal direction vibration enters echo signal reception light path 24 by the first polarization splitting prism 16 reflection, and is received by detector.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. for an optical system for photoelectric nacelle, it is characterized in that, described optical system comprises: laser Shared aperture system (10), signal launching and receiving system (110);
Described laser Shared aperture system (10) comprises the laser instrument (11), the first half-wave plate (12), the polarizer (13), Glan-Taylor prism (14), beam expanding lens (15), the first polarization splitting prism (16) that set gradually along laser irradiation axis, through the light of described first polarization splitting prism (16) transmission to described signal launching and receiving system (110)
Described signal launching and receiving system (110) is for carrying out passive detection to the visible ray received and infrared light and be emitted to described first polarization splitting prism (16) by being irradiated to the echoed signal after target surface;
Described optical system also comprises: be arranged on the echo reception system on reflected light path that described echoed signal reflects along described first polarization splitting prism (16), described echo reception system comprises the second half-wave plate (17), the second polarization splitting prism (18) that set gradually, the transmission optical axis of described second polarization splitting prism (18) arranges laser ranging detector (19), the reflection optical axis of described second polarization splitting prism (18) arranges laser angular tracking detector (20).
2. the optical system for photoelectric nacelle according to claim 1, is characterized in that,
Described laser instrument (11) generates linearly polarized laser bundle, and described first half-wave plate (12) is for rotating the laser beam making it to become and be parallel to the vibration of laser irradiation axis by the polarization direction of described linearly polarized laser bundle.
3. the optical system for photoelectric nacelle according to claim 2, is characterized in that,
The extinction ratio of described Glan-Taylor prism (14) is greater than 10
5: 1.
4. the optical system for photoelectric nacelle according to claim 3, is characterized in that,
The extinction ratio of described first polarization splitting prism (16) is greater than 10
4: 1.
5. the optical system for photoelectric nacelle according to claim 1, is characterized in that,
Described signal launching and receiving system (110) comprises the Signal reception subsystem (30) for carrying out passive detection to the visible ray received and infrared light, laser beam is passed to off-axis reflection telescopic system (40), pendulum mirror system (50) successively through described Signal reception subsystem (30), point to target surface by described pendulum mirror system (50), and echoed signal is passed to described first polarization splitting prism (16) through described pendulum mirror system (50), described off-axis reflection telescopic system (40), described Signal reception subsystem (30) successively.
6. the optical system for photoelectric nacelle according to claim 5, is characterized in that,
Described Signal reception subsystem (30) comprising:
First spectroscope (31), is located on the transmitted light path of described first polarization splitting prism (16), for transmitted infrared light and reflect visible light and laser beam,
Second spectroscope (32), is located in the transmitting light path of described first spectroscope (31), for visible light transmissive and reflection lasering beam,
Catoptron (33), is located on the reflected light path of described second reflective mirror, for by laser beam reflection to described off-axis reflection telescopic system (40).
7. the optical system for photoelectric nacelle according to claim 6, is characterized in that,
Described Signal reception subsystem (30) also comprises:
Near infrared imaging detector, is located on the transmitted light path of described first spectroscope (31), for carrying out passive detection to infrared light;
Visual light imaging detector, is located on the transmitted light path of described second spectroscope (32), for carrying out passive detection to visible ray.
8. the optical system for photoelectric nacelle according to claim 5, is characterized in that,
Parallel flat surface in described off-axis reflection telescopic system (40) is coated with the anti-reflection film for improving laser beam transmission rate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510366902.1A CN104977725A (en) | 2015-06-29 | 2015-06-29 | Optical system for photoelectric pod |
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| CN201510366902.1A CN104977725A (en) | 2015-06-29 | 2015-06-29 | Optical system for photoelectric pod |
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| CN201510366902.1A Pending CN104977725A (en) | 2015-06-29 | 2015-06-29 | Optical system for photoelectric pod |
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| CN107367736A (en) * | 2017-08-14 | 2017-11-21 | 杭州欧镭激光技术有限公司 | A kind of high-rate laser range unit |
| CN107390225A (en) * | 2017-08-14 | 2017-11-24 | 杭州欧镭激光技术有限公司 | A kind of laser ranging system and its application method |
| CN108341067A (en) * | 2017-01-25 | 2018-07-31 | 福建福光股份有限公司 | It is fitted big visual field optics structure for pod and working method based on flat glass |
| CN108693634A (en) * | 2018-04-27 | 2018-10-23 | 中国科学院西安光学精密机械研究所 | Wide-spectrum common-aperture television, infrared zooming imaging and laser tracking guiding optical system |
| CN109709852A (en) * | 2018-12-27 | 2019-05-03 | 中国科学院长春光学精密机械与物理研究所 | A kind of airborne photoelectric gondola complex axes control system and method |
| CN109870804A (en) * | 2019-03-29 | 2019-06-11 | 中国科学院上海技术物理研究所 | The visible infrared imaging of the anti-Five-channel of one kind off-axis three and laser pick-off optical system |
| CN112912766A (en) * | 2021-02-02 | 2021-06-04 | 华为技术有限公司 | Detection device, control method, fusion detection system and terminal |
| CN114068752A (en) * | 2021-11-18 | 2022-02-18 | 中国科学院长春光学精密机械与物理研究所 | Photoelectric detector with light splitting structure |
| CN114296100A (en) * | 2021-12-01 | 2022-04-08 | 武汉华中天纬测控有限公司 | Common-aperture underwater optical system |
| CN115469323A (en) * | 2022-09-05 | 2022-12-13 | Oppo广东移动通信有限公司 | Depth information acquisition module and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108341067A (en) * | 2017-01-25 | 2018-07-31 | 福建福光股份有限公司 | It is fitted big visual field optics structure for pod and working method based on flat glass |
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| CN108693634A (en) * | 2018-04-27 | 2018-10-23 | 中国科学院西安光学精密机械研究所 | Wide-spectrum common-aperture television, infrared zooming imaging and laser tracking guiding optical system |
| CN109709852A (en) * | 2018-12-27 | 2019-05-03 | 中国科学院长春光学精密机械与物理研究所 | A kind of airborne photoelectric gondola complex axes control system and method |
| CN109870804A (en) * | 2019-03-29 | 2019-06-11 | 中国科学院上海技术物理研究所 | The visible infrared imaging of the anti-Five-channel of one kind off-axis three and laser pick-off optical system |
| CN112912766A (en) * | 2021-02-02 | 2021-06-04 | 华为技术有限公司 | Detection device, control method, fusion detection system and terminal |
| CN114068752B (en) * | 2021-11-18 | 2023-12-01 | 中国科学院长春光学精密机械与物理研究所 | Photoelectric detector with light splitting structure |
| CN114068752A (en) * | 2021-11-18 | 2022-02-18 | 中国科学院长春光学精密机械与物理研究所 | Photoelectric detector with light splitting structure |
| CN114296100A (en) * | 2021-12-01 | 2022-04-08 | 武汉华中天纬测控有限公司 | Common-aperture underwater optical system |
| CN115469323A (en) * | 2022-09-05 | 2022-12-13 | Oppo广东移动通信有限公司 | Depth information acquisition module and electronic equipment |
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