CN104330843A - Laser ceilometer optical system and light-splitting reflector thereof - Google Patents
Laser ceilometer optical system and light-splitting reflector thereof Download PDFInfo
- Publication number
- CN104330843A CN104330843A CN201410350450.3A CN201410350450A CN104330843A CN 104330843 A CN104330843 A CN 104330843A CN 201410350450 A CN201410350450 A CN 201410350450A CN 104330843 A CN104330843 A CN 104330843A
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- light
- laser
- photic zone
- reflector
- dichroic reflector
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/08—Mirrors
- G02B5/0808—Mirrors having a single reflecting layer
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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
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
The invention discloses a laser ceilometer optical system and a light-splitting reflector thereof. The light-splitting reflector comprises a reflector body. The reflector body comprises a light-permeable area at the center place and a light-reflecting area beyond the light-permeable area. The reflector body has an upper surface and a lower surface, wherein the light-permeable areas of the upper and lower surfaces are respectively plated with an antireflection film; the light-reflecting area of the upper surface is plated with a full-reflection film; and the light-reflecting area of the lower surface is plated with a deglossing paint. The light-splitting reflector in the laser ceilometer optical system can realize a light-splitting function by plating different films at different areas of the two surfaces respectively, and can enable emission light to pass effectively and reception light to be reflected effectively, thereby not only guaranteeing the majority of laser to be transmitted to the lens and the minority of laser to be reflected to an energy detection device, and meanwhile, enabling reception signals to be reflected to a receiver, but also improving light utilization rate, and reducing interference of stray light; the laser ceilometer optical system and the light-splitting reflector thereof are simple in structure, convenient to install and debug, and good in performance, and have very high practical value and profound economic significance.
Description
Technical field
The present invention relates to a kind of optical system of laser ceilometer and dichroic reflector thereof.
Background technology
Laser ceilometer is according to laser distance measuring principle, and the pulse of transmitter Emission Lasers is in air, and receiver receives the backscatter signal of cloud layer and air, judges cloud layer and calculate height of cloud base value through complementary operation.Laser ceilometer can the Measurement accuracy height of cloud base, penetration thickness etc.
The rationality of optical system of laser ceilometer design directly determines measurement capability and the performance of cloud metre, is one of core component of cloud metre.In laser ceilometer list path optical system, dichroic reflector is between transmitter and lens, dichroic reflector be centrally located on the optical axis of lens, be 45 degree with lens axis to place, utilizing emitted light first by dichroic reflector again through lens outgoing, receive light be split after lens entrance catoptron reflection and be received by the receiver.For ensureing that the measurement performance of equipment needs to make the utilizing emitted light of scioptics outgoing farthest launch and makes reception light farthest be received by the receiver.
China Patent No. 200910304950.2 discloses a kind of optical system of laser ceilometer, comprise generating laser, laser pickoff, optical transmitting system and receiving optics, optical transmitting system and receiving optics share a set of optical lens, tilting between focal plane below this optical lens and its have dichroic reflector, and this dichroic reflector is positioned on the optical axis of optical lens.Here dichroic reflector is half-reflecting half mirror, there is the reflectivity of 38%, this half-reflection and half-transmission dichroic reflector easily cause utilizing emitted light be split catoptron reflection after, very strong reflected light directly enters receiver again thus brings very strong interference of stray light to system after inwall multiple reflections.
China Patent No. 200810246212.2 discloses optical-mechanical system of semiconductor laser cloud height automatic measuring instrument, the plane mirror parallel with beam splitter is provided with before beam splitter, there are illuminating source exit pupil in these plane mirror central authorities, namely beam splitter coordinate again one with holes be all-trans level crossing to realize light splitting function, due to these beam splitter needs and one with holes be all-trans level crossing with the use of, its system architecture is complicated, and cost is high; Require higher to the installation accuracy of total reflective mirror and dichroic reflector.
Summary of the invention
The object of this invention is to provide a kind of dichroic reflector, easily to bring interference of stray light or complex structure, problem that installation accuracy is high when existing laser ceilometer dichroic reflector uses to solve, a kind of optical system of laser ceilometer using this dichroic reflector is provided simultaneously.
In order to realize above object, the technical solution adopted in the present invention is: a kind of dichroic reflector, comprise mirror body, described mirror body comprises the reflective areas outside the photic zone of center and photic zone, described photic zone is the region that laser beam passes through from dichroic reflector, and described reflective areas is receive light by the region reflected; This mirror body has upper and lower two surfaces, and the photic zone on upper and lower surface is all coated with anti-reflection film, and the reflective areas of upper surface is coated with the film that is all-trans, and the reflective areas of lower surface scribbles delustring paint.
Described photic zone is region that is trapezoidal or ellipsoidal structure.
The technical scheme that optical system of laser ceilometer of the present invention adopts is: a kind of optical system of laser ceilometer, comprise generating laser, laser pickoff, optical transmitting system and receiving optics, optical transmitting system and receiving optics share a set of lens, dichroic reflector is placed with between these lens and its generating laser, this dichroic reflector be centrally located on the optical axis of lens, be 45 degree with lens axis to place, described dichroic reflector comprises mirror body, described mirror body comprises the reflective areas outside the photic zone of center and photic zone, and on this mirror body has, lower two surfaces, upper surface is towards lens, lower surface is towards generating laser, the photic zone on upper and lower surface is all coated with anti-reflection film, and the reflective areas of upper surface is coated with the film that is all-trans, and the reflective areas of lower surface scribbles delustring paint.
Described photic zone is region that is trapezoidal or ellipsoidal structure.
Optical system of laser ceilometer of the present invention and dichroic reflector thereof realize the function of light splitting by the method for plating different film in the zones of different on dichroic reflector two surface respectively, utilizing emitted light can be made effectively to pass through, receive light usable reflection, both ensured that Received signal strength was reflexed to receiver to lens fraction laser reflection to energy measuring by most of Laser emission simultaneously, and effectively can improve the utilization factor of light, reduce interference of stray light, and structure is simple, be convenient to Installation and Debugging and functional, there is very high practical value and deep economic implications.
Accompanying drawing explanation
Fig. 1 is the structure principle chart of optical system of laser ceilometer of the present invention;
Fig. 2 is the structure principle chart of dichroic reflector of the present invention.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
Be illustrated in figure 1 the structure principle chart of optical system of laser ceilometer embodiment of the present invention, as seen from the figure, this system comprises generating laser 1, laser pickoff 4, optical transmitting system and receiving optics, optical transmitting system and receiving optics share a set of optical lens 3, tilting between this optical lens and the generating laser below it have the dichroic reflector 2 becoming 45 degree with lens axis, and being centrally located on the optical axis of optical lens of this dichroic reflector.This dichroic reflector comprises the reflective areas outside the photic zone of center and photic zone, and utilizing emitted light is launched by photic zone, receives light and is received by the receiver by reflective areas reflection.
In addition, this system also comprises the energy testing apparatus 5 that dichroic reflector is arranged towards generating laser side, by dichroic reflector, the fraction light level of light source is separated the monitoring realizing LASER Light Source energy.
As shown in Figure 2, dichroic reflector of the present invention comprises mirror body, mirror body comprises the reflective areas 22 outside the photic zone 21 of center and photic zone, and this mirror body has upper and lower two surfaces, the photic zone on upper and lower surface is all coated with anti-reflection film, the reflective areas of upper surface is coated with the film that is all-trans, and the reflective areas of lower surface scribbles delustring paint.The centre wavelength of anti-reflection film and the film that is all-trans is 905nm herein; The preferred black delustring paint of delustring paint.
According to the difference of LASER Light Source, effectively utilize the xsect of laser beam for rectangle or circle, its transmission laser light beam then corresponds to trapezium structure or ellipsoidal structure by the cross section in region on 45 degree of dichroic reflectors placed, for reaching optimum transmission and reflecting effect, on dichroic reflector, the photic zone of corresponding transmission laser beam area is set to trapezium structure corresponding with it or ellipsoidal structure; If trapezium structure, then trapezoidal in use go to the bottom (the long end) places upward, as shown in Figure 1.
Present invention also offers a kind of dichroic reflector, concrete structure is described above.
Principle of work of the present invention is as follows: this dichroic reflector adopts the zones of different on upper and lower surface to plate the method for different film respectively to realize the function of effective light splitting, one side wherein towards generating laser is lower surface (A face), and the one side towards lens is upper surface (B face).The laser beam of the present embodiment is rectangle, 45 degree place spectroscopes on be projected as shadow region---photic zone 21, this region is that the utilizing emitted light of effectively utilization is by spectroscopical region, A face, this region, the anti-reflection film of 905nm is all plated in B face, utilizing emitted light is at utmost passed through, the interference of stray light that the A face blacking delustring paint of the region beyond shade---reflective areas causes to reduce radiative reflection, simultaneously the sub-fraction light that reflected by A face of utilizing emitted light has been received by laser energy the function that laser energy detects, the film that is all-trans of the B face plating 905nm of reflective areas makes reception light be received device effectively to receive.
Above embodiment only understands core concept of the present invention for helping; the present invention can not be limited with this; for those skilled in the art; every according to thought of the present invention; the present invention is modified or equivalent replacement; any change done in specific embodiments and applications, all should be included within protection scope of the present invention.
Claims (4)
1. a dichroic reflector, it is characterized in that: comprise mirror body, described mirror body comprises the reflective areas outside the photic zone of center and photic zone, and described photic zone is the region that laser beam passes through from dichroic reflector, and described reflective areas is receive light by the region reflected; This mirror body has upper and lower two surfaces, and the photic zone on upper and lower surface is all coated with anti-reflection film, and the reflective areas of upper surface is coated with the film that is all-trans, and the reflective areas of lower surface scribbles delustring paint.
2. dichroic reflector according to claim 1, is characterized in that: described photic zone is region that is trapezoidal or ellipsoidal structure.
3. an optical system of laser ceilometer, comprise generating laser, laser pickoff, optical transmitting system and receiving optics, optical transmitting system and receiving optics share a set of lens, dichroic reflector is placed with between these lens and its generating laser, this dichroic reflector be centrally located on the optical axis of lens, be 45 degree with lens axis to place, it is characterized in that: described dichroic reflector comprises mirror body, described mirror body comprises the reflective areas outside the photic zone of center and photic zone, and on this mirror body has, lower two surfaces, upper surface is towards lens, lower surface is towards generating laser, the photic zone on upper and lower surface is all coated with anti-reflection film, and the reflective areas of upper surface is coated with the film that is all-trans, and the reflective areas of lower surface scribbles delustring paint.
4. optical system of laser ceilometer according to claim 3, is characterized in that: described photic zone is region that is trapezoidal or ellipsoidal structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350450.3A CN104330843A (en) | 2014-07-22 | 2014-07-22 | Laser ceilometer optical system and light-splitting reflector thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410350450.3A CN104330843A (en) | 2014-07-22 | 2014-07-22 | Laser ceilometer optical system and light-splitting reflector thereof |
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| CN104330843A true CN104330843A (en) | 2015-02-04 |
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| CN201410350450.3A Pending CN104330843A (en) | 2014-07-22 | 2014-07-22 | Laser ceilometer optical system and light-splitting reflector thereof |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105108330A (en) * | 2015-08-20 | 2015-12-02 | 京东方科技集团股份有限公司 | Beam splitter, laser generator and excimer laser annealing device |
| CN105652261A (en) * | 2015-12-29 | 2016-06-08 | 华勤通讯技术有限公司 | Laser radar optical system and laser radar |
| CN106199991A (en) * | 2015-09-18 | 2016-12-07 | 王治霞 | Light splitting piece and the coaxial diastimeter of laser thereof and application |
| CN109696688A (en) * | 2017-10-20 | 2019-04-30 | 西克股份公司 | The method of send-receive module and test object for photoelectric sensor |
| CN111670375A (en) * | 2019-01-09 | 2020-09-15 | 深圳市大疆创新科技有限公司 | Distance measuring device and mobile platform |
| CN112689786A (en) * | 2019-04-01 | 2021-04-20 | 深圳市速腾聚创科技有限公司 | Optical scanning device and laser radar |
| CN114853356A (en) * | 2022-04-29 | 2022-08-05 | 福建福特科光电股份有限公司 | Laser radar reflector machining method |
| JP2023508459A (en) * | 2019-12-27 | 2023-03-02 | 華為技術有限公司 | Ranging system and mobile platform |
| WO2023116919A3 (en) * | 2021-12-24 | 2023-08-10 | 武汉万集光电技术有限公司 | Laser radar coaxial transceiving system, and laser radar |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10133081B2 (en) | 2015-08-20 | 2018-11-20 | Boe Technology Group Co., Ltd. | Beam splitter, laser generator and excimer laser annealing apparatus |
| CN105108330A (en) * | 2015-08-20 | 2015-12-02 | 京东方科技集团股份有限公司 | Beam splitter, laser generator and excimer laser annealing device |
| CN106199991B (en) * | 2015-09-18 | 2020-04-21 | 王治霞 | Laser coaxial distance measuring instrument |
| WO2017045641A1 (en) * | 2015-09-18 | 2017-03-23 | 王治霞 | Beam splitter and laser coaxial rangefinder and application thereof |
| CN106199991A (en) * | 2015-09-18 | 2016-12-07 | 王治霞 | Light splitting piece and the coaxial diastimeter of laser thereof and application |
| CN105652261A (en) * | 2015-12-29 | 2016-06-08 | 华勤通讯技术有限公司 | Laser radar optical system and laser radar |
| CN109696688A (en) * | 2017-10-20 | 2019-04-30 | 西克股份公司 | The method of send-receive module and test object for photoelectric sensor |
| CN111670375A (en) * | 2019-01-09 | 2020-09-15 | 深圳市大疆创新科技有限公司 | Distance measuring device and mobile platform |
| CN112689786A (en) * | 2019-04-01 | 2021-04-20 | 深圳市速腾聚创科技有限公司 | Optical scanning device and laser radar |
| US11662438B2 (en) | 2019-04-01 | 2023-05-30 | Suteng Innovation Technology Co., Ltd. | Optical scanning apparatus and lidar with extinction component |
| CN112689786B (en) * | 2019-04-01 | 2023-08-25 | 深圳市速腾聚创科技有限公司 | Optical scanning device and laser radar |
| JP2023508459A (en) * | 2019-12-27 | 2023-03-02 | 華為技術有限公司 | Ranging system and mobile platform |
| WO2023116919A3 (en) * | 2021-12-24 | 2023-08-10 | 武汉万集光电技术有限公司 | Laser radar coaxial transceiving system, and laser radar |
| CN114853356A (en) * | 2022-04-29 | 2022-08-05 | 福建福特科光电股份有限公司 | Laser radar reflector machining method |
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Application publication date: 20150204 |
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