CN114924290B - Detection method of atmospheric ocean detection laser radar and relay optical system - Google Patents
Detection method of atmospheric ocean detection laser radar and relay optical system Download PDFInfo
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- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/95—Lidar systems specially adapted for specific applications for meteorological use
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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- G01S7/4802—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00 using analysis of echo signal for target characterisation; Target signature; Target cross-section
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Abstract
The invention provides a detection method and a relay optical system of an atmospheric ocean detection laser radar, which comprise field separation and multichannel echo signal detection, wherein a field separation mirror separates the field of the output light of a receiving telescope, a 532nm large field of the echo signal is reflected to the ocean detection channel relay optical system, a small field of the atmospheric echo signal passes through a central opening of the field separation mirror and then is emitted to an atmospheric detection channel collimating lens group, and then the multichannel optical relay is carried out after color separation and optical path turning. According to the invention, by adopting the view field separating mirror, a 532nm large view field echo signal of the detected sea floor is separated from 355nm, 532nm and 1064nm echo signals of the central view fields of the detected atmosphere and the sea surface, so that the composite detection of the atmospheric ocean space environment is realized; the echo signals are processed by adopting optical modules such as a collimating lens, a focusing lens, a dichroic mirror, a polarization spectroscope, an optical filter and the like, so that the three-wavelength five-channel detection function of the air and the sea is realized, and the atmosphere and the sea can be compositely detected.
Description
Technical Field
The invention relates to the technical field of measurement and test, in particular to a detection method of an atmospheric ocean detection laser radar and a relay optical system.
Background
Meteorological marine environmental conditions are important factors affecting the progress of military operations, and in special cases, the success or failure of the military operations can be determined. The first generation military atmospheric marine environment satellite cloud sea satellite loading push-broom CCD glimmer cloud image imager, full-polarization microwave radiometer, infrared scanning radiometer and other effective loads are utilized to acquire the global glimmer visible infrared cloud image, sea surface wind field and other information by means of glimmer and infrared imaging, and the like, so that the occurrence and evolution conditions of low cloud and large fog in the sea and a target area are monitored mainly in the morning and evening period, and meteorological hydrologic guarantee is provided for the navigation of the naval vessel on the water surface of the army, the take-off and landing of the carrier-borne aircraft, aviation flight, accurate guidance weapons and the application of optical reconnaissance satellites. The new generation of comprehensive observation satellite for military atmospheric and marine environments mainly realizes detection of land surfaces, sea surfaces, atmosphere, clouds, middle and high altitude wind fields, space environments and the like, produces and generates low cloud and large fog, sea surface wind fields, temperature and humidity profiles, middle and high altitude wind fields, space environments and other guarantee products, realizes the functions of detecting and forecasting the atmospheric and marine environments of target areas, and can provide atmospheric and marine environment information for naval vessels on water surfaces of our army navigation, carrier-borne take-off and landing, aviation flight, precise guidance weapon application and the like, thereby improving the meteorological and hydrologic guarantee capability of China.
The atmospheric ocean detection laser radar is mainly used for enhancing the cloud layer detection capability, in particular to the vertical structure and the category of the cloud layer, and aerosol and visibility detection. Therefore, a relay optical system suitable for comprehensive detection of air and sea is needed, so that the atmospheric and marine environment monitoring radar has high-precision cloud (cloud phase state and cloud droplet diameter), aerosol (atmospheric visibility) and sea surface wind field and sea wave detection capability in the global scope.
Disclosure of Invention
The invention provides a detection method and a relay optical system for an atmospheric ocean detection laser radar, which are used for solving the problem of composite detection of atmosphere and ocean, wherein a field separating mirror is adopted to separate a 532nm large field echo signal of a detection sea floor from center field 355nm, 532nm and 1064nm echo signals of the detection atmosphere and sea surface so as to realize composite detection of an atmospheric ocean space environment; the echo signals are processed by adopting optical modules such as a collimating lens, a focusing lens, a dichroic mirror, a polarization spectroscope, an optical filter and the like, so that the three-wavelength five-channel detection function of the air and the sea is realized, and the atmosphere and the sea can be compositely detected.
The invention provides a detection method of an atmospheric ocean detection laser radar, which comprises the following steps:
S1, field separation: the field separating lens performs field separation on output light of the receiving telescope, 532nm large field echo signals are reflected to the ocean detection channel relay optical system, small field atmospheric echo signals are emitted to the atmospheric detection channel collimating lens group after passing through the center opening of the field separating lens, and the field separating lens is placed at 45 degrees to turn an optical path;
S2, detecting a multichannel echo signal: the angle of collimation of the 532nm large-field echo signal into parallel light is designed according to the maximum light incidence angle acceptable by the optical filter, so that the 532nm large-field echo signal is firstly collimated into parallel light and then focused to the photosensitive surface of the photoelectric detector through the focusing mirror, and a 532nm large-field electric signal is obtained;
The small-view-field atmosphere echo signals are subjected to three-wavelength collimation through an atmosphere detection channel collimating lens group, then enter a 355nm atmosphere detection channel relay optical system, a 532nm polarization detection channel relay optical system and a 1064nm atmosphere detection channel relay optical system after color separation and optical path turning, and are subjected to parallel light filtering and focusing through a sub-channel and then are emitted to a photosensitive surface of a photoelectric detector to obtain 355nm atmosphere detection electric signals, 532nmP polarization atmosphere detection electric signals, 532nmS polarization atmosphere detection electric signals and 1064nm atmosphere detection electric signals;
the light path turning uses a 45-degree placed dichroic mirror or a turning reflecting mirror, and a focusing mirror is designed according to the incidence angle of the collimated parallel light.
The invention relates to a detection method of an atmospheric ocean detection laser radar, which is characterized in that, as a preferable mode, the step S2 comprises the following steps:
S21, detecting by a marine detection channel: the ocean detection channel relay optical system collimates 532nm large-field echo signals into parallel light and focuses the parallel light on a photosensitive surface of a photoelectric detector to obtain 532nm large-field electric signals; parameters of the ocean detection channel collimating lens group are designed according to the maximum light incident angle acceptable by the ocean detection channel filter;
S22, detecting by a 355nm atmosphere detection channel: the method comprises the steps that a small-view-field atmosphere echo signal is subjected to three-wavelength collimation through an atmosphere detection channel collimating lens group to obtain parallel light, then the parallel light is subjected to color separation through a first dichroic mirror, 355nm atmosphere detection echo signals are reflected to a 355nm atmosphere detection channel relay optical system, are filtered through a 355nm atmosphere detection channel optical filter and then focused on a photosensitive surface of a 355nm atmosphere detection channel photoelectric detector through a 355nm focusing lens group to obtain 355nm atmosphere detection electric signals, the first dichroic mirror is placed at 45 degrees to conduct optical path turning, and the 355nm focusing lens group is a plano-convex lens combination made of two SILICA materials;
s23, 532nm polarization detection channel detection: the method comprises the steps that a small-view-field atmospheric echo signal transmitted by a first dichroic mirror is output to a second dichroic mirror, the second dichroic mirror reflects a 532nm atmospheric detection echo signal to a 532nm polarized detection channel relay optical system, polarized light is split by a polarized light splitting prism, a P polarized channel filter is used for filtering light, a P polarized channel 532nm focusing mirror is used for focusing and then focusing on a P polarized channel photoelectric detector, 532nmP polarized atmospheric detection electric signals are obtained, reflected light of the polarized light splitting prism is transmitted to an S polarized channel filter after being subjected to optical path turning by a turning mirror, and focused on an S polarized channel photoelectric detector after being filtered by an S polarized channel 532nm focusing mirror, so that 532nmS polarized atmospheric detection electric signals are obtained;
The P polarization channel 532nm focusing lens and the S polarization channel 532nm focusing lens are respectively arranged into two plano-convex lens combinations made of SILICA materials according to the incidence angle after light filtering;
S24, detecting by a 1064nm atmosphere detection channel: the second dichroic mirror transmits the 1064nm atmospheric detection echo signal to a 1064nm atmospheric detection channel relay optical system, filters light through a 1064nm atmospheric detection channel filter, focuses light through a 1064nm focusing mirror, and focuses the light onto a 1064nm atmospheric detection channel photoelectric detector to obtain a 1064nm atmospheric detection electric signal;
The 1064nm focusing lens comprises three lenses made of H-ZF7LA and H-K9L, H-ZF7 LA.
The invention relates to a detection method of an atmospheric ocean detection laser radar, which is characterized in that, as a preferable mode, the step S2 comprises the following steps:
S25, polarization calibration: when the polarization calibration mode of the 532nm polarization detection channel relay optical system is performed, the depolarization plate is cut into the optical path.
The invention provides an atmospheric ocean detection laser radar relay optical system, which comprises a view field separating mirror, an ocean detection channel relay optical system, an atmospheric detection channel collimating lens group, a first dichroic mirror, a 355nm atmospheric detection channel relay optical system, a second dichroic mirror, a 532nm polarization detection channel relay optical system and a 1064nm atmospheric detection channel relay optical system, wherein the view field separating mirror is arranged on an output light path of a receiving telescope;
The field separating mirror is used for reflecting the 532nm large-field echo signal to the ocean detection channel relay optical system, and the incident light is collimated, filtered and focused to the photosensitive surface of the photoelectric detector to obtain a 532nm large-field electric signal, wherein the 532nm large-field echo signal is a submarine detection signal;
The field separating mirror is used for separating and turning the small field atmospheric echo signals after being perforated and outputting the small field atmospheric echo signals to the 355nm atmospheric detection channel relay optical system, the 532nm polarization detection channel relay optical system and the 1064nm atmospheric detection channel relay optical system respectively to obtain 355nm atmospheric detection electric signals, 532nmP polarization atmospheric detection electric signals, 532nmS polarization atmospheric detection electric signals and 1064nm atmospheric detection electric signals respectively, wherein the small field atmospheric echo signals are central field detection signals of the atmosphere and the sea surface.
The invention relates to an atmospheric ocean detection laser radar relay optical system, which is used as an optimal mode, and comprises an ocean detection channel collimating lens group, an ocean detection channel optical filter, an ocean detection channel focusing lens group and an ocean detection channel photoelectric detector which are sequentially arranged on a reflection optical path of a view field separating lens;
Plating 532nm high-reflection film on the view field separating mirror;
The ocean detection channel collimating lens group is a large-view-field 532nm wavelength collimating lens, the ocean detection channel collimating lens group is used for collimating 532nm large-view-field echo signals into parallel light, the F number of the ocean detection channel collimating lens group is matched with the F number of the receiving telescope, the ocean detection channel collimating lens group comprises 3 optical lenses which are made of H-ZF7LA and H-K9L, H-ZF7LA respectively, the ocean detection channel optical filter is a narrow-band optical filter, the ocean detection channel photoelectric detector is a PMT, and the focused light spot size of the ocean detection channel focusing lens group is matched with the photosensitive surface size of the ocean detection channel photoelectric detector.
According to the atmospheric ocean detection laser radar relay optical system, as a preferable mode, an atmospheric detection channel collimating lens group is a three-wavelength collimating lens with a central view field of 355nm, 532nm and 1064nm, the atmospheric detection channel collimating lens group is used for collimating a small view field atmospheric echo signal into parallel light, the atmospheric detection channel collimating lens group comprises two optical lenses which are made of SILICA, and the F number of the atmospheric detection channel collimating lens group is matched with the F number of a receiving telescope;
the surface of the first dichroic mirror is plated with a 355nm high-reflection film, and the first dichroic mirror is used for reflecting 355nm atmospheric detection echo signals;
The surface of the second dichroic mirror is plated with a 532nm high-reflection film, and the second dichroic mirror is used for reflecting 532nm atmosphere detection echo signals;
the first dichroic mirror and the second dichroic mirror are both placed 45 °.
The invention relates to an atmospheric ocean detection laser radar relay optical system, which is used as an optimal mode, and comprises a 355nm atmospheric detection channel filter, a 355nm focusing lens group and a 355nm atmospheric detection channel photoelectric detector which are sequentially arranged on a first dichroic mirror reflection light path;
The 355nm focusing lens group comprises two optical lenses made of SILICA; the 355nm atmosphere detection channel filter is a narrow-band filter, the 355nm atmosphere detection channel photoelectric detector is a PMT, and the size of a light spot focused by the 355nm focusing lens group is matched with the size of a photosensitive surface of the 355nm atmosphere detection channel photoelectric detector.
The invention relates to an atmospheric ocean detection laser radar relay optical system, which is used as a preferable mode, wherein a 532nm polarization detection channel relay optical system comprises a depolarization sheet, a polarization beam splitter prism, a turning mirror, a P polarization channel filter, a P polarization channel 532nm focusing mirror and a P polarization channel photoelectric detector, wherein the depolarization sheet and the polarization beam splitter prism are sequentially arranged on a reflection light path of a second dichroic mirror, the turning mirror is arranged on a reflection light path of the polarization beam splitter prism, the P polarization channel filter, the P polarization channel 532nm focusing mirror and the P polarization channel photoelectric detector are sequentially arranged on a transmission light path of the polarization beam splitter prism, and the S polarization channel filter, the S polarization channel 532nm focusing mirror and the S polarization channel photoelectric detector are sequentially arranged on a reflection light path of the polarization beam splitter prism and are placed at 45 degrees;
The depolarization sheet is used for cutting into the light path to perform polarization calibration when the relay optical system performs a polarization calibration mode, and cutting out the light path when the air-sea detection mode is performed; the polarization beam splitter prism is used for transmitting 532nmP polarized light and reflecting 532nmS polarized light, and the turning mirror is used for turning the light path of 532nmS polarized light by 90 degrees; the P polarization channel 532nm focusing lens and the S polarization channel 532nm focusing lens both comprise two plano-convex lenses made of SILICA; the P-polarized channel filter and the S-polarized channel filter are both narrow-band filters, the P-polarized channel photoelectric detector and the S-polarized channel photoelectric detector are PMT, the size of a light spot focused by a P-polarized channel 532nm focusing lens is matched with the size of a photosensitive surface of the P-polarized channel photoelectric detector, and the size of a light spot focused by an S-polarized channel 532nm focusing lens is matched with the size of a photosensitive surface of the S-polarized channel photoelectric detector.
The invention relates to an atmospheric ocean detection laser radar relay optical system, which is used as an optimal mode, and comprises a 1064nm atmospheric detection channel filter, a 1064nm focusing mirror and a 1064nm atmospheric detection channel photoelectric detector which are sequentially arranged on a transmission light path of a second dichroic mirror;
The 1064nm atmosphere detection channel filter is a narrow-band filter, the 1064nm focusing lens comprises 3 optical lenses made of H-ZF7LA and H-K9L, H-ZF7LA, the size of a light spot focused by the 1064nm focusing lens is matched with the size of a photosensitive surface of the 1064nm atmosphere detection channel photoelectric detector, and the 1064nm atmosphere detection channel photoelectric detector is an APD.
The technical solution of the invention is as follows: an atmospheric ocean exploration laser radar relay optical system is divided into five channels, which are respectively: detecting a 532nm channel on the sea floor; atmospheric detection 355nm channel; atmospheric detection 532nmP polarization detection channel; atmospheric detection 532nmS polarization detection channel; atmospheric detection 1064nm detection channel. The atmospheric ocean detection laser radar relay optical system consists of modules such as a view field separating mirror, a collimating mirror, a focusing mirror, a dichroic mirror, a turning reflecting mirror, a polarization spectroscope, a depolarization sheet, a light filter and the like, performs treatments such as view field separation, color separation, filtering and the like on echo signals, and finally focuses on a photosensitive surface of a detector.
An atmospheric ocean exploration laser radar relay optical system which is characterized in that: the device consists of a view field separating lens, a marine detection channel collimating lens group, a marine detection channel focusing lens group, an atmospheric detection channel collimating lens group, a dichroic mirror 1, a 355nm focusing lens group, a dichroic mirror 2, a depolarizing sheet, a polarization beam splitter prism, a turning reflecting mirror, a 532nm focusing lens, a 1064nm focusing lens and narrow-band optical filters of all channels, wherein the optical parameters of the device are matched with the parameters of a receiving telescope.
The view field separating mirror is placed at the focal plane of the receiving telescope at 45 degrees, is provided with a central opening and is plated with a 532nm high-reflection film, and the view field separating mirror is used for separating 532mm large view field echo signals from 355nm, 532nm and 1064nm central small view field echo signals.
The collimating lens comprises a 532nm large-view-field collimating lens and a three-wavelength central view-field collimating lens and is used for collimating echo signals into parallel light, and the F number of the collimating lens is required to be matched with that of the telescope.
The focusing mirror is used for focusing the collimated echo signals so as to facilitate the receiving of the photosensitive surface of the detector, and the size of the focused light spot is matched with the size of the photosensitive surface of the detector.
A dichroic mirror is placed 45 deg. for separating different wavelength light, wherein the dichroic mirror reflects 355nm wavelength light, transmits 532nm and 1064nm wavelength light, and the dichroic mirror reflects 532nm wavelength light, transmits 1064nm wavelength light. The folding reflector is placed at 45 degrees and is used for folding 532nm light path.
The polarization beam splitter was used for 532nm polarization path to separate 532nmP light from S light. 6. An atmospheric ocean sounding lidar relay optical system according to claim 1, wherein: the channel filters are used for filtering background stray light, improving the signal to noise ratio of the system, and the central wavelength of the channel filters is matched with the wavelength of the laser.
The collimating lens module comprises two collimating lenses, one is a large-view-field 532nm wavelength collimating lens, and comprises 3 optical lenses, wherein the materials are H-ZF7LA and H-K9L, H-ZF7LA respectively. A three-wavelength collimating lens with a central field of view of 355nm, 532nm and 1064nm comprises two optical lenses, and the materials are SILICA.
The focusing lens module comprises three focusing lenses, one is a large-view-field 532nm wavelength focusing lens, the size of a photosensitive surface of the focusing lens module is 8mm, the focusing lens module comprises 3 optical lenses, and the materials are H-ZF7LA and H-K9L, H-ZF7LA respectively; a focusing mirror with 355nm and 532nm has a photosensitive surface with a size of 8mm, and comprises two optical lenses, wherein the materials are SILICA; the last focusing lens is 1064nm focusing lens, the size of the photosensitive surface is 0.8mm, the focusing lens comprises 3 optical lenses, and the materials are H-ZF7LA and H-K9L, H-ZF7LA respectively.
A view field separating lens is placed at a 45-degree position of a focal plane of the receiving telescope, the center of the view field separating lens is provided with an opening, a 532nm high-reflection film is plated on the surface of the view field separating lens, 532nm large-view field echo signals are reflected to a marine detection channel collimating lens group to be collimated into parallel light, a 532nm optical filter is added into a parallel light path, and then the parallel light path is focused by a marine detection channel focusing lens group and then enters a photosensitive surface of a marine detection channel detector. The small-view-field atmospheric echo signal is collimated by the atmospheric detection channel collimating lens group after passing through the center opening of the view-field separating lens, and then is split by the dichroic mirror 1, wherein the 355nm wavelength echo signal is reflected, is focused by the 355nm optical filter and the 355nm focusing lens group, and then is incident to the photosensitive surface of the 355nm atmospheric detection channel detector. The transmitted 532nm and 1064nm echo signals are reflected by the dichroic mirror, 532nm echo signals are reflected by the polarization beam splitter prism, 532nmS polarized light is reflected, and the reflected light is incident to the photosensitive surface of the 532nmS channel detector through the refraction mirror, the 532nm optical filter and the 532nm focusing mirror. The polarization beam splitter prism transmits 532nmP polarized light, and the polarized light is incident to the photosensitive surface of the 532nmP channel detector after passing through the optical filter and the 532nm focusing mirror. The 1064nm echo signal light transmitted by the dichroic mirror passes through a 1064nm filter and a 1064nm focusing mirror and then enters the photosensitive surface of the 1064nm atmosphere detection channel detector.
The depolarization sheet is used for calibrating the polarization efficiency of 532nm polarization channels, and cuts into the light path for polarization calibration when the system is in a polarization calibration mode, and cuts out the light path when the system is in a sea-air detection mode, so that the system detects normally.
The invention has the following advantages:
(1) The existing laser radar technology basically separates atmospheric detection and ocean detection, is two detection systems, and the relay optical system designed by the invention can realize integrated and miniaturized detection of the atmosphere and the ocean and meet the meteorological hydrologic guarantee of diversified military tasks.
(2) The invention adopts the design of dividing the center opening of the 45-degree reflecting mirror into fields and wavelengths, can separate 532nm large-field ocean echo signals, and does not influence the processing of atmospheric small-field echo signals.
Drawings
FIG. 1 is a flow chart of a detection method of an atmospheric ocean detection lidar;
FIG. 2 is a flowchart of a detection method step S2 of the atmospheric ocean detection lidar;
FIG. 3 is a schematic diagram of an atmospheric ocean sounding lidar relay optics system;
FIG. 4 is an optical design of a marine detection channel of an atmospheric marine detection lidar relay optical system;
FIG. 5 is an optical design diagram of an atmospheric ocean sounding lidar relay optical system 355nm, 532nmP/S atmospheric sounding channel;
Fig. 6 is an optical design diagram of an atmospheric detection channel of the atmospheric ocean detection lidar relay optical system 1064 nm.
Reference numerals:
1. A field separating mirror; 2. a marine probe channel relay optical system; 21. ocean detection channel collimation lens group; 22. ocean exploration channel filters; 23. ocean exploration channel focusing lens group; 24. ocean detection channel photoelectric detector; 3. an atmosphere detection channel collimating lens group; 4. a first dichroic mirror; 5. 355nm atmosphere detection channel relay optical system; 51. 355nm atmospheric detection channel filter; 52. 355nm focusing lens group; 53. 355nm atmosphere detection channel photoelectric detector; 6. a second dichroic mirror; 7. 532nm polarization detection channel relay optics; 71. a depolarization tablet; 72. a polarization beam splitter prism; 73. a turning mirror; 74. a P-polarized channel filter; 75. p-polarized channel 532nm focusing mirror; 76. p-polarized channel photodetectors; 77. an S-polarized channel filter; 78. s polarization channel 532nm focusing mirror; 79. an S-polarized light channel photodetector; 8. 1064nm atmospheric detection channel relay optics; 81. 1064nm atmospheric detection channel filter; 82. 1064nm focusing mirror; 83. 1064nm atmosphere detection channel photodetector.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
As shown in fig. 1, a detection method of an atmospheric ocean detection laser radar comprises the following steps:
S1, field separation: the field separating mirror 1 performs field separation on the output light of the receiving telescope, 532nm large-field echo signals are reflected to the ocean detection channel relay optical system 2, small-field atmospheric echo signals are emitted to the atmosphere detection channel collimating mirror group 3 after passing through the center opening of the field separating mirror 1, and the field separating mirror is placed at 145 degrees to turn an optical path;
S2, detecting a multichannel echo signal: the angle of collimation of the 532nm large-field echo signal into parallel light is designed according to the maximum light incidence angle acceptable by the optical filter, so that the 532nm large-field echo signal is firstly collimated into parallel light and then focused to the photosensitive surface of the photoelectric detector through the focusing mirror, and a 532nm large-field electric signal is obtained;
The small-view-field atmosphere echo signal is subjected to three-wavelength collimation through an atmosphere detection channel collimating lens group 3, then subjected to color separation and light path turning, and then respectively enters a 355nm atmosphere detection channel relay optical system 5, a 532nm polarization detection channel relay optical system 7 and a 1064nm atmosphere detection channel relay optical system 8, and the collimated parallel light is filtered and focused through a sub-channel and then is emitted to a photosensitive surface of a photoelectric detector to obtain 355nm atmosphere detection electric signals, 532nmP polarization atmosphere detection electric signals, 532nmS polarization atmosphere detection electric signals and 1064nm atmosphere detection electric signals;
the light path turning uses a dichroic mirror or a turning reflecting mirror which is placed at 45 degrees, and a focusing mirror is designed according to the incidence angle of the collimated parallel light;
As shown in fig. 2, S21, ocean exploration channel exploration: the ocean detection channel relay optical system 2 collimates 532nm large-field echo signals into parallel light and focuses the parallel light on a photosensitive surface of a photoelectric detector to obtain 532nm large-field electric signals; parameters of the ocean detection channel collimating lens group 21 are designed according to the maximum light incident angle acceptable by the ocean detection channel optical filter 22;
S22, detecting by a 355nm atmosphere detection channel: the small-view-field atmosphere echo signal is subjected to three-wavelength collimation through an atmosphere detection channel collimation lens group 3 to obtain parallel light, then the parallel light is subjected to color separation through a first dichroic mirror 4, 355nm atmosphere detection echo signals are reflected to a 355nm atmosphere detection channel relay optical system 5, are filtered through a 355nm atmosphere detection channel optical filter 51 and then focused on a photosensitive surface of a 355nm atmosphere detection channel photoelectric detector 53 through a 355nm focusing lens group 52 to obtain 355nm atmosphere detection electric signals, the first dichroic mirror is placed at 445 degrees to turn an optical path, and the 355nm focusing lens group 52 is a plano-convex lens combination made of two SILICA materials;
S23, 532nm polarization detection channel detection: the small-view-field atmospheric echo signal transmitted by the first dichroic mirror 4 is output to the second dichroic mirror 6, the second dichroic mirror 6 reflects the 532nm atmospheric detection echo signal to the 532nm polarized detection channel relay optical system 7, polarized light is split by the polarized light splitting prism 72, filtered by the P polarized channel filter 74, focused by the P polarized channel 532nm focusing mirror 75 and then focused to the P polarized channel photoelectric detector 76, 532nmP polarized atmospheric detection electric signals are obtained, reflected light of the polarized light splitting prism 72 is deflected by the deflecting mirror 73 in an optical path and then is emitted to the S polarized channel filter 77, and focused by the S polarized channel 532nm focusing mirror 78 after being filtered and then focused to the S polarized channel photoelectric detector 79, so that 532nmS polarized atmospheric detection electric signals are obtained;
The P-polarization channel 532nm focusing lens 75 and the S-polarization channel 532nm focusing lens 78 are both arranged as a plano-convex lens combination of two SILICA materials according to the filtered incident angle;
s24, detecting by a 1064nm atmosphere detection channel: the second dichroic mirror 6 transmits the 1064nm atmospheric detection echo signal to the 1064nm atmospheric detection channel relay optical system 8, filters the signal through the 1064nm atmospheric detection channel filter 81, focuses the signal through the 1064nm focusing mirror 82, and focuses the signal on the 1064nm atmospheric detection channel photoelectric detector 83 to obtain a 1064nm atmospheric detection electric signal;
The 1064nm focusing lens 82 comprises three lenses made of H-ZF7LA and H-K9L, H-ZF7LA respectively;
s25, polarization calibration: when the polarization calibration mode of the 532nm polarization detection channel relay optical system 7 is performed, the depolarizing plate 71 is cut into the optical path.
Example 2
As shown in fig. 3, an atmospheric ocean detection laser radar relay optical system comprises a view field separating mirror 1 arranged on a central opening of an output light path of a receiving telescope, an ocean detection channel relay optical system 2 arranged on a reflection light path of the view field separating mirror 1, an atmospheric detection channel collimating lens group 3, a first dichroic mirror 4, an atmospheric detection channel relay optical system 5 arranged on a reflection light path of the first dichroic mirror 4, a second dichroic mirror 6 arranged on a transmission light path of the first dichroic mirror 4, a 532nm polarization detection channel relay optical system 7 arranged on a reflection light path of the second dichroic mirror 6, and an atmospheric detection channel relay optical system 8 arranged on a transmission light path of the second dichroic mirror 6, wherein the view field separating mirror 145 ° is arranged at a focal plane of the receiving telescope;
The field separating mirror 1 is used for reflecting a 532nm large field echo signal to the ocean detection channel relay optical system 2, and the incident light is collimated, filtered and focused to the photosensitive surface of the photoelectric detector to obtain a 532nm large field electric signal, wherein the 532nm large field echo signal is a submarine detection signal;
The view field separating mirror 1 is used for separating and turning and outputting small view field atmospheric echo signals to a 355nm atmospheric detection channel relay optical system 5, a 532nm polarization detection channel relay optical system 7 and a 1064nm atmospheric detection channel relay optical system 8 after opening holes to respectively obtain 355nm atmospheric detection electric signals, 532nmP polarization atmospheric detection electric signals, 532nmS polarization atmospheric detection electric signals and 1064nm atmospheric detection electric signals, wherein the small view field atmospheric echo signals are central view field detection signals of the atmosphere and the sea surface;
The ocean detection channel relay optical system 2 comprises an ocean detection channel collimating lens group 21, an ocean detection channel optical filter 22, an ocean detection channel focusing lens group 23 and an ocean detection channel photoelectric detector 24 which are sequentially arranged on a reflection light path of the view field separating lens 1;
plating 532nm high-reflection film on the view field separating mirror 1;
The ocean detection channel collimating lens group 21 is a large-view-field 532nm wavelength collimating lens, the ocean detection channel collimating lens group 21 is used for collimating 532nm large-view-field echo signals into parallel light, the F number of the ocean detection channel collimating lens group 21 is matched with the F number of a receiving telescope, the ocean detection channel collimating lens group 21 comprises 3 optical lenses which are made of H-ZF7LA and H-K9L, H-ZF7LA respectively, the ocean detection channel optical filter 22 is a narrow-band optical filter, the ocean detection channel photoelectric detector 24 is a PMT, and the focused light spot size of the ocean detection channel focusing lens group 23 is matched with the photosensitive surface size of the ocean detection channel photoelectric detector 24;
The atmosphere detection channel collimating lens group 3 is a three-wavelength collimating lens with center view fields of 355nm, 532nm and 1064nm, the atmosphere detection channel collimating lens group 3 is used for collimating the atmosphere echo signals with small view fields into parallel light, the atmosphere detection channel collimating lens group 3 comprises two optical lenses which are made of SILICA, and the F number of the atmosphere detection channel collimating lens group 3 is matched with the F number of the receiving telescope;
The surface of the first dichroic mirror 4 is plated with a 355nm high-reflection film, and the first dichroic mirror 4 is used for reflecting 355nm atmosphere detection echo signals;
The surface of the second dichroic mirror 6 is plated with a 532nm high-reflection film, and the second dichroic mirror 6 is used for reflecting 532nm atmosphere detection echo signals;
The first dichroic mirror 4 and the second dichroic mirror 6 are both placed at 45 °;
the 355nm atmosphere detection channel relay optical system 5 comprises a 355nm atmosphere detection channel filter 51, a 355nm focusing lens group 52 and a 355nm atmosphere detection channel photoelectric detector 53 which are sequentially arranged on the reflection light path of the first dichroic mirror 4;
The 355nm focusing lens group 52 comprises two optical lenses made of SILICA; the 355nm atmosphere detection channel filter 51 is a narrow-band filter, the 355nm atmosphere detection channel photodetector 53 is a PMT, and the size of a light spot focused by the 355nm focusing lens group 52 is matched with the size of a photosensitive surface of the 355nm atmosphere detection channel photodetector 53;
the 532nm polarization detection channel relay optical system 7 comprises a depolarization sheet 71, a polarization splitting prism 72, a turning mirror 73, a P polarization channel filter 74, a P polarization channel 532nm focusing mirror 75, a P polarization channel photoelectric detector 76, an S polarization channel filter 77, an S polarization channel 532nm focusing mirror 78 and an S polarization channel photoelectric detector 79, wherein the depolarization sheet 71, the polarization splitting prism 72, the turning mirror 73, the P polarization channel filter 74, the P polarization channel 532nm focusing mirror 75 and the P polarization channel photoelectric detector 76 are sequentially arranged on a reflection light path of the polarization splitting prism 72, and the turning mirror 7345 DEG is arranged;
the depolarization sheet 71 is used for cutting into the optical path to perform polarization calibration when the relay optical system performs polarization calibration mode, and cutting out the optical path when the air-sea detection mode is performed; the polarization splitting prism 72 is used for transmitting 532nmP polarized light and reflecting 532nmS polarized light, and the turning mirror 73 is used for turning the optical path of 532nmS polarized light by 90 degrees; the P-polarization channel 532nm focusing lens 75 and the S-polarization channel 532nm focusing lens 78 both comprise two plano-convex lenses made of SILICA; the P-polarized channel filter 74 and the S-polarized channel filter 77 are both narrow-band filters, the P-polarized channel photodetector 76 and the S-polarized channel photodetector 79 are PMTs, the size of the light spot focused by the P-polarized channel 532nm focusing mirror 75 is matched with the size of the photosurface of the P-polarized channel photodetector 76, and the size of the light spot focused by the S-polarized channel 532nm focusing mirror 78 is matched with the size of the photosurface of the S-polarized channel photodetector 79;
The 1064nm atmosphere detection channel relay optical system 8 includes a 1064nm atmosphere detection channel filter 81, a 1064nm focusing mirror 82, and a 1064nm atmosphere detection channel photodetector 83, which are sequentially disposed on the transmission light path of the second dichroic mirror 6;
The 1064nm atmosphere detection channel filter 81 is a narrow-band filter, the 1064nm focusing mirror 82 comprises 3 optical lenses made of H-ZF7LA and H-K9L, H-ZF7LA, the size of a light spot focused by the 1064nm focusing mirror 82 is matched with the size of a photosensitive surface of the 1064nm atmosphere detection channel photoelectric detector 83, and the 1064nm atmosphere detection channel photoelectric detector 83 is an APD.
Example 3
An atmospheric ocean detection laser radar relay optical system can realize the integrated detection of sea surface, seabed and atmosphere of a 3-wavelength 6-channel, and the schematic diagram of the optical system is shown in figure 3. A view field separating lens 1 is placed at a 45-degree position of a focal plane of a receiving telescope, the center of the view field separating lens is provided with an opening, the surface of the view field separating lens is plated with a 532nm high-reflection film, 532nm large-view field echo signals are reflected to a marine detection channel collimating lens group 2 to be collimated into parallel light, a 532nm optical filter is added into a parallel light path, and then the parallel light path is focused by a marine detection channel focusing lens group 3 and then enters a photosensitive surface of a marine detection channel detector. The small-view-field atmospheric echo signal is collimated by the atmospheric detection channel collimating lens group 4 and then split by the first dichroic mirror 5 after passing through the center opening of the view-field separating lens, wherein the 355nm wavelength echo signal is reflected and enters the photosensitive surface of the 355nm atmospheric detection channel detector after being focused by the 355nm optical filter and the 355nm focusing lens group 6. The transmitted 532nm and 1064nm echo signals are reflected by the dichroic mirror 7, 532nm echo signals are reflected by the polarization beam splitter prism 9, 532nmS polarized light is reflected, and the reflected light is incident to the photosensitive surface of the 532nmS channel detector through the refraction mirror 10, the 532nm optical filter and the 532nm focusing mirror 11. The polarization beam splitter prism transmits 532nmP polarized light, and the polarized light passes through the optical filter and the 532nm focusing mirror 11 and then enters the photosensitive surface of the 532nmP channel detector. The 1064nm echo signal light transmitted by the dichroic mirror 7 passes through a 1064nm filter and a 1064nm focusing mirror 12 and then enters the photosensitive surface of the 1064nm atmosphere detection channel detector. The depolarization sheet 8 cuts into the optical path when the system performs the polarization calibration mode, performs polarization calibration, and cuts out the optical path when the system performs the sea-gas detection mode.
In consideration of the problems that optical elements such as a light filter, a dichroic mirror, a polarization spectroscope and the like are required to be added in a relay light path, and the optical elements such as the light filter and the like have requirements on the incident angle of light, each designed channel optical system is equally divided into a collimating mirror module and a focusing mirror module, parallel light is arranged between the collimating mirror module and the focusing mirror module, the light angle of the parallel light is designed according to the maximum incident angle of the light which can be accepted by the optical elements such as the light filter and the like during design, and a photosensitive surface of a detector is placed at the focus of the focusing mirror.
The above design process will be described in detail below
General index parameter of relay optical system
The relay optical system design input parameters are as follows:
wavelengths of 355nm, 532nm and 1064nm;
The field of view: 532nm ocean exploration channel view field 10mrad
Atmospheric detection channel center view field 1mrad
355Nm and 532nm atmosphere detection channel detector photosurfaces: phi 8mm
532Nm ocean probe channel detector photosurface: phi 8mm
1064Nm atmosphere detection channel detector photosurface: phi 0.8mm;
532nm ocean exploration channel optical design
The ocean detection channel adopts a form of collimation and focusing of a collimating lens, and is divided into a collimating lens group and a focusing lens group, the design result is shown in figure 4, the collimating lens group comprises 3 optical lenses, the materials are H-ZF7LA and H-K9L, H-ZF7LA respectively, the nominal multiplying power of the collimating lens is 20 times, the nominal value of the divergence angle of outgoing parallel light of the collimating lens is 1.14 degrees, and the requirement of the incidence angle of an optical filter is met. The focusing lens group comprises 3 optical lenses, the materials are H-ZF7LA and H-K9L, H-ZF7LA respectively, and finally the size of an image surface after passing through the focusing lens is 5.2mm, so that the size of a photosensitive surface of the detector is met.
355/532Nm atmosphere detection channel optical design
The 355nm/532nm atmosphere detection channel optical design adopts a form of collimation and focusing of a collimating lens, and is divided into a collimating lens group and a focusing lens group, the design result is shown in figure 5, compared with the field of view of the ocean detection channel, the field of view of the atmosphere detection channel is much smaller, so that the collimating lens and the focusing lens are both in a form of combining two plano-convex lenses, the materials are SILICA, and the size of a light spot at a photosensitive surface of a detector is 4mm in a focusing lens defocusing mode.
1064Nm atmosphere detection channel optical design
The 1064nm atmosphere detection channel adopts a form of collimation and focusing of a collimating lens, and is divided into a collimating lens group and a focusing lens group, and the design result is shown in figure 6, wherein the collimating lens is shared by 355nm/532nm channels. Because the size of the photosensitive surface of the 1064nm channel detector is 0.8mm, three lenses are needed to be used for the designed focusing lens, and the materials are H-ZF7LA and H-K9L, H-ZF7LA respectively. The final photosurface spot size was 0.6mm.
The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (9)
1. A detection method of an atmospheric ocean detection laser radar is characterized in that: the method comprises the following steps:
S1, field separation: the field separating mirror (1) performs field separation on output light of the receiving telescope, 532nm large-field echo signals are reflected to the ocean detection channel relay optical system (2), small-field atmospheric echo signals pass through a central opening of the field separating mirror (1) and then are emitted to the atmosphere detection channel collimating lens group (3), and the field separating mirror (1) is placed at 45 degrees to turn an optical path;
S2, detecting a multichannel echo signal: the angle of collimation of the 532nm large-field echo signal into parallel light is designed according to the maximum light incident angle acceptable by the optical filter, so that the 532nm large-field echo signal is firstly collimated into parallel light and then focused to a photosensitive surface of the photoelectric detector through the focusing mirror, and a 532nm large-field electric signal is obtained;
The small-view-field atmosphere echo signal is subjected to three-wavelength collimation through an atmosphere detection channel collimation lens group (3), then subjected to color separation and light path turning, and then respectively enters a 355nm atmosphere detection channel relay optical system (5), a 532nm polarization detection channel relay optical system (7) and a 1064nm atmosphere detection channel relay optical system (8), and collimated parallel light is filtered and focused through a sub-channel and then is emitted to a photosensitive surface of a photoelectric detector to obtain 355nm atmosphere detection electric signals, 532nmP polarization atmosphere detection electric signals, 532nmS polarization atmosphere detection electric signals and 1064nm atmosphere detection electric signals;
the light path turning uses a 45-degree placed dichroic mirror or a turning reflecting mirror, and a focusing mirror is designed according to the incidence angle of the collimated parallel light.
2. The method for detecting the atmospheric ocean detection lidar according to claim 1, wherein the steps of: step S2 comprises the steps of:
S21, detecting by a marine detection channel: the ocean detection channel relay optical system (2) collimates the 532nm large-field echo signal into parallel light and focuses the parallel light on a photosensitive surface of a photoelectric detector to obtain the 532nm large-field electric signal; parameters of the ocean detection channel collimating lens group (21) are designed according to the maximum light incident angle acceptable by the ocean detection channel filter (22);
S22, detecting by a 355nm atmosphere detection channel: the small-view-field atmosphere echo signals are subjected to three-wavelength collimation through the atmosphere detection channel collimation lens group (3) to obtain parallel light, then the parallel light is subjected to color separation through the first dichroic mirror (4), 355nm atmosphere detection echo signals are reflected to the 355nm atmosphere detection channel relay optical system (5), are filtered through the 355nm atmosphere detection channel optical filter (51) and then focused on the photosensitive surface of the 355nm atmosphere detection channel photoelectric detector (53) through the 355nm focusing lens group (52), so that 355nm atmosphere detection electric signals are obtained, the first dichroic mirror (4) is placed at 45 degrees to conduct optical path turning, and the 355nm focusing lens group (52) is a plano-convex lens combination made of two SILICA materials;
S23, 532nm polarization detection channel detection: the small-view-field atmospheric echo signals transmitted through the first dichroic mirror (4) are output to the second dichroic mirror (6), the second dichroic mirror (6) reflects 532nm atmospheric detection echo signals to a 532nm polarization detection channel relay optical system (7), the 532nm atmospheric detection echo signals are polarized and split by a polarization splitting prism (72), filtered by a P polarization channel filter (74) and focused by a P polarization channel 532nm focusing mirror (75) to be focused to a P polarization channel photoelectric detector (76), 532nmP polarization atmospheric detection electric signals are obtained, reflected light of the polarization splitting prism (72) is reflected to an S polarization channel filter (77) after being subjected to optical path turning by a turning mirror (73), filtered and focused by an S polarization channel 532nm focusing mirror (78) to be focused to an S polarization channel photoelectric detector (79), and 532nmS polarization atmospheric detection electric signals are obtained;
the P polarization channel 532nm focusing lens (75) and the S polarization channel 532nm focusing lens (78) are respectively arranged into two plano-convex lens combinations made of SILICA materials according to the incidence angle after light filtering;
S24, detecting by a 1064nm atmosphere detection channel: the second dichroic mirror (6) transmits 1064nm atmospheric detection echo signals to a 1064nm atmospheric detection channel relay optical system (8), filters the signals through a 1064nm atmospheric detection channel filter (81), focuses the signals through a 1064nm focusing mirror (82) and focuses the signals on a 1064nm atmospheric detection channel photoelectric detector (83) to obtain 1064nm atmospheric detection electric signals;
the 1064nm focusing lens (82) comprises three lenses made of H-ZF7LA and H-K9L, H-ZF7LA respectively.
3. The method for detecting the atmospheric ocean detection lidar according to claim 2, wherein the steps of: step S2 comprises the steps of:
s25, polarization calibration: when the polarization calibration mode of the 532nm polarization detection channel relay optical system (7) is performed, a depolarization sheet (71) is cut into an optical path.
4. An atmospheric ocean exploration laser radar relay optical system which is characterized in that: the device comprises a view field separating mirror (1) which is arranged on a central opening of an output light path of a receiving telescope, an ocean detection channel relay optical system (2) which is arranged on a reflection light path of the view field separating mirror (1), an atmosphere detection channel collimating lens group (3) and a first dichroic mirror (4) which are sequentially arranged on the central light path of the view field separating mirror (1), a 355nm atmosphere detection channel relay optical system (5) which is arranged on the reflection light path of the first dichroic mirror (4), a second dichroic mirror (6) which is arranged on a transmission light path of the first dichroic mirror (4), a 532nm polarization detection channel relay optical system (7) which is arranged on the reflection light path of the second dichroic mirror (6) and a 1064nm atmosphere detection channel relay optical system (8) which is arranged on the transmission light path of the second dichroic mirror (6), wherein the view field separating mirror (1) is placed at a focal plane of the receiving telescope at 45 degrees;
The visual field separating mirror (1) is used for reflecting 532nm large visual field echo signals to the ocean detection channel relay optical system (2), and the incident light is collimated, filtered and focused to the photosensitive surface of the photoelectric detector to obtain 532nm large visual field electric signals, wherein the 532nm large visual field echo signals are submarine detection signals;
the field separating mirror (1) is used for separating and turning and respectively outputting small field atmospheric echo signals to the 355nm atmospheric detection channel relay optical system (5), the 532nm polarization detection channel relay optical system (7) and the 1064nm atmospheric detection channel relay optical system (8) after the small field atmospheric echo signals pass through the holes, so as to respectively obtain 355nm atmospheric detection electric signals, 532nmP polarization atmospheric detection electric signals, 532nmS polarization atmospheric detection electric signals and 1064nm atmospheric detection electric signals, wherein the small field atmospheric echo signals are central field detection signals of the atmosphere and sea surface.
5. An atmospheric ocean sounding lidar relay optical system according to claim 4, wherein: the ocean detection channel relay optical system (2) comprises an ocean detection channel collimating lens group (21), an ocean detection channel optical filter (22), an ocean detection channel focusing lens group (23) and an ocean detection channel photoelectric detector (24) which are sequentially arranged on a reflection light path of the view field separating lens (1);
the visual field separating mirror (1) is plated with a 532nm high-reflection film;
The marine detection channel collimating lens group (21) is a large-view-field 532nm wavelength collimating lens, the marine detection channel collimating lens group (21) is used for collimating the 532nm large-view-field echo signals into parallel light, the F number of the marine detection channel collimating lens group (21) is matched with the F number of the receiving telescope, the marine detection channel collimating lens group (21) comprises 3 optical lenses which are made of H-ZF7LA and H-K9L, H-ZF7LA respectively, the marine detection channel optical filter (22) is a narrow-band optical filter, the marine detection channel photoelectric detector (24) is a PMT, and the focused light spot size of the marine detection channel focusing lens group (23) is matched with the photosensitive surface size of the marine detection channel photoelectric detector (24).
6. An atmospheric ocean sounding lidar relay optical system according to claim 4, wherein: the atmosphere detection channel collimating lens group (3) is a three-wavelength collimating lens with center view fields of 355nm, 532nm and 1064nm, the atmosphere detection channel collimating lens group (3) is used for collimating the small view field atmosphere echo signals into parallel light, the atmosphere detection channel collimating lens group (3) comprises two optical lenses made of SILICA, and the F number of the atmosphere detection channel collimating lens group (3) is matched with the F number of the receiving telescope;
The surface of the first dichroic mirror (4) is plated with a 355nm high-reflection film, and the first dichroic mirror (4) is used for reflecting 355nm atmospheric detection echo signals;
The surface of the second dichroic mirror (6) is plated with a 532nm high-reflection film, and the second dichroic mirror (6) is used for reflecting 532nm atmospheric detection echo signals;
the first dichroic mirror (4) and the second dichroic mirror (6) are both placed at 45 °.
7. An atmospheric ocean sounding lidar relay optical system according to claim 4, wherein: the 355nm atmosphere detection channel relay optical system (5) comprises a 355nm atmosphere detection channel filter (51), a 355nm focusing lens group (52) and a 355nm atmosphere detection channel photoelectric detector (53) which are sequentially arranged on a reflection optical path of the first dichroic mirror (4);
the 355nm focusing lens group (52) comprises two optical lenses made of SILICA; the 355nm atmosphere detection channel optical filter (51) is a narrow-band optical filter, the 355nm atmosphere detection channel photoelectric detector (53) is a PMT, and the size of a light spot focused by the 355nm focusing lens group (52) is matched with the size of a photosensitive surface of the 355nm atmosphere detection channel photoelectric detector (53).
8. An atmospheric ocean sounding lidar relay optical system according to claim 4, wherein: the 532nm polarization detection channel relay optical system (7) comprises a depolarization sheet (71), a polarization splitting prism (72) which are sequentially arranged on a reflection light path of the second dichroic mirror (6), a refraction reflecting mirror (73) which is arranged on a reflection light path of the polarization splitting prism (72), a P polarization channel filter (74), a P polarization channel 532nm focusing mirror (75) and a P polarization channel photoelectric detector (76) which are sequentially arranged on a transmission light path of the polarization splitting prism (72), and an S polarization channel filter (77), an S polarization channel 532nm focusing mirror (78) and an S polarization channel photoelectric detector (79) which are sequentially arranged on a reflection light path of the polarization splitting prism (72), wherein the refraction reflecting mirror (73) is placed at 45 degrees;
The depolarization sheet (71) is used for cutting into an optical path to perform polarization calibration when the relay optical system performs a polarization calibration mode, and cutting out the optical path when the air-sea detection mode is performed; the polarization beam splitter prism (72) is used for transmitting 532nmP polarized light and reflecting 532nmS polarized light, and the turning mirror (73) is used for turning the optical path of 532nmS polarized light by 90 degrees; the P polarization channel 532nm focusing lens (75) and the S polarization channel 532nm focusing lens (78) comprise two plano-convex lenses made of SILICA; the P-polarized channel filter (74) and the S-polarized channel filter (77) are narrow-band filters, the P-polarized channel photoelectric detector (76) and the S-polarized channel photoelectric detector (79) are PMTs, the light spot size focused by the P-polarized channel 532nm focusing mirror (75) is matched with the light-sensitive surface size of the P-polarized channel photoelectric detector (76), and the light spot size focused by the S-polarized channel 532nm focusing mirror (78) is matched with the light-sensitive surface size of the S-polarized channel photoelectric detector (79).
9. An atmospheric ocean sounding lidar relay optical system according to claim 4, wherein: the 1064nm atmosphere detection channel relay optical system (8) comprises a 1064nm atmosphere detection channel filter (81), a 1064nm focusing mirror (82) and a 1064nm atmosphere detection channel photoelectric detector (83) which are sequentially arranged on a transmission light path of the second dichroic mirror (6);
The 1064nm atmosphere detection channel filter (81) is a narrow-band filter, the 1064nm focusing mirror (82) comprises 3 optical lenses made of H-ZF7LA and H-K9L, H-ZF7LA, the focused light spot size of the 1064nm focusing mirror (82) is matched with the photosensitive surface size of the 1064nm atmosphere detection channel photoelectric detector (83), and the 1064nm atmosphere detection channel photoelectric detector (83) is an APD.
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| 大视场高分辨力星载成像光谱仪光学系统设计;薛庆生;黄煜;林冠宇;;光学学报;20110810(08);248-253 * |
| 星载大气痕量气体差分吸收光谱仪前置光学系统设计;司福祺;江宇;江庆五;薛辉;周海金;刘文清;;光学学报;20130310(03);245-251 * |
| 机械斩波在大气探测激光雷达中的应用;林鑫;杨勇;程学武;关塞;王继红;李发泉;刘林美;宋沙磊;陈振威;李亚娟;;中国激光;20130810(08);222-227 * |
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