CN102313882A - Optical system structure of laser range finder - Google Patents
Optical system structure of laser range finder Download PDFInfo
- Publication number
- CN102313882A CN102313882A CN201110211264A CN201110211264A CN102313882A CN 102313882 A CN102313882 A CN 102313882A CN 201110211264 A CN201110211264 A CN 201110211264A CN 201110211264 A CN201110211264 A CN 201110211264A CN 102313882 A CN102313882 A CN 102313882A
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- Prior art keywords
- lens
- optical system
- system structure
- range finder
- optical
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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
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4816—Constructional features, e.g. arrangements of optical elements of receivers alone
-
- 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
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Electromagnetism (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Optical Radar Systems And Details Thereof (AREA)
- Lenses (AREA)
Abstract
The invention relates to an optical system structure of a laser range finder. The optical system structure comprises: a laser emission source; a collimating lens, which is arranged in front of the laser emission source; an optical receiver; a receiving objective lens, which gathers reflected light rays to the optical receiver. The receiving objective lens, which is a free curved-surface optical element, comprises an aspherical part and a hypertorus part. The reflected light rays with an infinite distance pass through the aspherical part of the receiving objective lens and focus on the optical receiver. The reflected light rays with a short distance pass through the hypertorus part of the receiving objective lens and cover on the surface of the optical receiver. By using the optical system structure of the invention, high precision measurement with the long distance and the short distance can be satisfied. A structure is simple. Measurement stability is good. Cost performance of the laser range finder with the optical system structure is better than common measurement devices. The optical system structure is beneficial to realization of miniaturization.
Description
Technical field
Patent of the present invention relates to a kind of laser range finder, particularly about a kind of optical system structure of laser range finder.
Background technology
Laser range finder is in engineering survey, and aspects such as construction account and house decoration all are widely used.Laser range finder commonly used is generally based on phase measurement principle and impulse phase measuring principle, and this type of measuring instrument measuring distance is from several millimeters to hundreds of meters, and measuring accuracy reaches more than the millimeter level.
As shown in Figure 1, a kind of optical system structure of typical laser range finder in the prior art comprises Laser emission light source 1; Collimator objective 2, measurement target 3, receiving objective 4; Optical receiver 5; The light receiving surface 6 of optical receiver 5, to the circuit 7 that light source is modulated, control computation unit 8 and The measured results show unit 9.
Survey when remote, reflected light incides on the receiving objective 4 with the mode of directional light, converges at receiving objective focus A place then, promptly on the light receiving surface 6 of optical receiver 5.When close-in measurement; Reflected light to receiving objective 4, has an angle with the optical axis of receiving objective 4 with the outer light oblique incidence of axle, thus imaging depart from the receiving objective primary optical axis and be positioned at focus A near; Thereby make light receiving surface 6 can't receive reflection measurement light, measurement can not be carried out.
There are a lot of technology all to be devoted to solve this problem of close-in measurement in the prior art.For example by the curved reflector shown in Fig. 2 10, or the compound lens and the special shape optical receiver of two kinds of focal lengths among the prism shown in Fig. 3 11 or Fig. 4 A, Fig. 4 B, the problem of close-in measurement can be solved to a great extent.
But these methods or can not carry out deviation to all in-plant reflected light have limitation, or complex structure, and cost is higher.
Summary of the invention
The object of the present invention is to provide a kind of laser ranging optical system, can measure far and near distance through simple and reliable structure, volume is little, and good cost performance is applicable to miniaturization structure.
Technical scheme of the present invention: a kind of optical system structure of laser range finder; Comprise the Laser emission light source; Place Laser emission light source collimator objective before; Optical receiver and the receiving objective that converges reflection ray to optical receiver, wherein said receiving objective are free form surface optical elements, and it partly is made up of aspheric surface part and toroid; Wherein the reflection ray of the infinity non-spherical surface that passes described free form surface receiving objective partly focuses on the said optical receiver, and the toroid that in-plant reflection ray passes described free form surface receiving objective partly covers the surface of said optical receiver.
Among the present invention, the complex objective lens that said free form surface receiving objective is partly combined by non-spherical surface part and toroid.
Among the present invention, described free form surface receiving objective comprises separate non-spherical surface lens and toroidal lens.
Among the present invention, the compound lens that described free form surface receiving objective is formed by non-spherical surface lens and toroidal lens gummed.
Among the present invention, the toroidal lens of described toroidal lens formula part.
The beneficial effect that the present invention has: laser ranging optical system of the present invention can satisfy remote and high-acruracy survey closely, and simple in structure, good measuring stability, and cost performance is all more superior than general measurement mechanism, helps the realization of miniaturization.
Description of drawings
Fig. 1 is a kind of typical optical system diagram in the prior art;
Fig. 2 makes closely the reflection measurement light deflection to the surperficial optical system diagram of optical receiver for using curved reflector in the prior art;
Fig. 3 makes closely the reflection measurement light deflection to the surperficial optical system diagram of optical receiver for using prism in the prior art;
Fig. 4 A, Fig. 4 B use bi-focal combined reception lens and special shape optical receiver in the prior art, solve the optical system diagram of close-in measurement;
Fig. 5 is the optical system diagram of the related a kind of free form surface receiving objective of patent of the present invention;
Fig. 6, Fig. 7 are the perspective view and the view of the related a kind of typical toroidal lens of patent of the present invention;
Fig. 8 is the optical system diagram of a kind of preferred implementation of the related optical system structure of patent of the present invention.
[figure number is to as directed]
1 Laser emission light source, 2 collimator objectives
3 measurement target, 4 receiving objectives
5 optical receivers, 6 light receiving surfaces
10 curved reflectors, 11 prisms
14 non-spherical surfaces add the free-form surface lens 15 toroid part lens that toroid is formed
16 non-spherical surface part lens
Wherein: xoy is lonely arrow face, and yoz is a meridian ellipse
Embodiment
For making architectural feature of the present invention and the effect reached there are further understanding and understanding, cooperate detailed explanation, explain as follows in order to preferred embodiment and accompanying drawing:
The optical system structure of laser range finder according to the invention; Comprise the Laser emission light source; Place Laser emission light source collimator objective before; Optical receiver and the receiving objective that converges opposition light to optical receiver, wherein said receiving objective is a free form surface optical element, it partly is made up of non-spherical surface part and toroid; Wherein the reflection ray of the infinity non-spherical surface that passes described free form surface receiving objective partly focuses on the said optical receiver, and the toroid that in-plant reflection ray passes described free form surface receiving objective partly covers the surface of said optical receiver.
Wherein, non-spherical surface part and toroid part can be combined the formation complex objective lens.
Wherein, non-spherical surface lens and toroidal lens also can be separate.
Wherein, non-spherical surface lens and toroidal lens can formation compound lenss glued together.
Wherein, toroidal lens is the toroidal lens of part.
At first consult Fig. 5; The optical system structure of laser range finder according to the invention comprises: non-spherical surface adds the free-form surface lens 14 of toroid combination, optical receiver 5, the light receiving surface 6 of optical receiver 5; Collimation lens 2, measurement target 3 and Laser emission light source 1.
The emission light that comes out from Laser emission light source 1 is transmitted on the measurement target 3 behind collimator objective 2 collimations; At this moment light beam produces diffuse reflection on measurement target 3; These light that reflect with various angles are received object lens and converge, and the receiving objective among Fig. 5 is the free-form surface lens 14 that the aspheric surface curved surface adds the toroid combination.
When measuring distant object, reflection measurement light incides free form surface compound lens 14 with directional light, and partly focuses on optical receiver 5 surfaces through non-spherical surface.When measuring closely, reflection measurement light incides free-form surface lens 14, and through toroid part they is become fan beam and cover on optical receiver 5 surfaces.
Consult Fig. 6, Fig. 7, be the perspective view and the view of the related a kind of canonical dissection toroidal lens of patent of the present invention.After light beam passes through toroidal lens, in the meridian ellipse (being the yoz face among Fig. 6) of these lens, exhale with fan-shaped form.Equally, in the sagittal surface (being the xoy face among Fig. 6) of these lens, also exhale with fan-shaped form.
Through adopting the parameter of different toroidal lenss, like effective focal length, deflection angle, the radius-of-curvature on the meridian ellipse, the radius-of-curvature on the sagittal surface, centre-height, materials etc. can obtain different segment angle light beams.Certainly, the size of fan shape angle and its locus also should be complementary with the non-spherical surface of free form surface.
Like Fig. 8, receiving objective is a typical free form surface optical element, the compound lens that it is formed by non-spherical surface part 16 and toroidal lens part 15 gummeds.When measuring distant object; Reflection measurement light incides receiving objective with directional light, through non-spherical surface lens 16, focuses on the light receiving surface 6 of optical receiver 5; Light through toroidal lens 15 can not cover on the light receiving surface 6 of optical receiver 5, can not produce interference like this.
When measuring closely, the light beam of the toroid part lens 15 through free-form surface lens forms fan beam at meridian ellipse and sagittal surface, covers on the light receiving surface 6 of optical receiver 5.Ratio of curvature on the meridian ellipse is less, and the ratio of curvature on the sagittal surface is bigger, and formed three-dimensional fan beam covers on light receiving surface 6.Measurement range just can be from the millimeter to the infinity like this, in theory.
Aspheric surface of the present invention is meant can not be with the face shape of sphere definition description, the face shape that promptly can not only confirm with a radius.Aspheric surface has been included various shapes; Rotational symmetric aspheric surface and non-rotational symmetric aspheric surface are wherein arranged,, arrange micro structure array clocklike relevant for bisymmetric shape; The optical surface that comprises diffraction structure is arranged, also comprise different free form surface etc.
Free form surface optics is according to the requirement of modern optical electric system for the reception of signal, conversion, storage, transmission etc., the optical surface and the method for designing of structure arbitrary shape.The optical element of arbitrary shape is called the free form surface optical element.Free form surface is the advanced stage of aspheric surface development.
In sum; Be merely preferred embodiment of the present invention; Be not to be used for limiting the scope that the present invention implements, all equalizations of doing according to the described shape of claim scope of the present invention, structure, characteristic and spirit change and modify, and all should be included in the claim scope of the present invention.
Claims (5)
1. the optical system structure of a laser range finder; It is characterized in that; Comprise the Laser emission light source, place Laser emission light source collimator objective before, optical receiver and the receiving objective that converges reflection ray to optical receiver; Wherein said receiving objective is a free form surface optical element; It partly is made up of aspheric surface part and toroid, and wherein the reflection ray of the infinity aspheric surface of passing described free form surface receiving objective partly focuses on the said optical receiver, and the toroid that in-plant reflection ray passes the free form surface object lens of said reception partly covers the surface of said optical receiver.
2. the optical system structure of laser range finder according to claim 1 is characterized in that, the complex objective lens that described free form surface receiving objective is partly combined by non-spherical surface part and toroid.
3. the optical system of laser range finder according to claim 1 is characterized in that, said free form surface receiving objective comprises separate non-spherical surface lens and toroidal lens.
4. the optical system structure of laser range finder according to claim 1 is characterized in that, the compound lens of said free form surface receiving objective for being formed by non-spherical surface lens and toroidal lens gummed.
5. according to the optical system structure of the described laser range finder of above-mentioned each claim, it is characterized in that said toroidal lens is the part toroidal lens.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110211264.8A CN102313882B (en) | 2011-07-22 | 2011-07-22 | The optical system structure of laser range finder |
| PCT/CN2011/001290 WO2013013349A1 (en) | 2011-07-22 | 2011-08-05 | Optical system structure of laser range finder |
| PCT/CN2012/000421 WO2013013488A1 (en) | 2011-07-22 | 2012-03-31 | Optical system structure of laser range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110211264.8A CN102313882B (en) | 2011-07-22 | 2011-07-22 | The optical system structure of laser range finder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102313882A true CN102313882A (en) | 2012-01-11 |
| CN102313882B CN102313882B (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110211264.8A Expired - Fee Related CN102313882B (en) | 2011-07-22 | 2011-07-22 | The optical system structure of laser range finder |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN102313882B (en) |
| WO (1) | WO2013013488A1 (en) |
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102645738A (en) * | 2012-04-23 | 2012-08-22 | 南京德朔实业有限公司 | Laser range finder and condensing mirror applicable for receiving light of laser range finder |
| WO2013013488A1 (en) * | 2011-07-22 | 2013-01-31 | 江苏徕兹光电科技有限公司 | Optical system structure of laser range finder |
| CN103293529A (en) * | 2012-06-04 | 2013-09-11 | 南京德朔实业有限公司 | Laser ranging device |
| JP2013197109A (en) * | 2012-03-15 | 2013-09-30 | Omron Corp | Reflection type photoelectric sensor |
| CN104035099A (en) * | 2013-03-08 | 2014-09-10 | 江苏徕兹光电科技有限公司 | Dual-transmitting dual-receiving phase measurement-based calibration method and range finding device |
| CN104457689A (en) * | 2013-09-25 | 2015-03-25 | 北京航天计量测试技术研究所 | An Optical Transceiver Structure for Short-range Laser Range Finder |
| CN104833966A (en) * | 2015-05-22 | 2015-08-12 | 南京爱立光电有限公司 | Laser-ranging optical system |
| EP3168642A1 (en) * | 2015-11-13 | 2017-05-17 | Sick Ag | Optoelectronic sensor and method for detecting an object |
| CN109196378A (en) * | 2016-06-29 | 2019-01-11 | 苹果公司 | Optical system for remote sensing receiver |
| CN111491444A (en) * | 2020-05-19 | 2020-08-04 | 常州纵慧芯光半导体科技有限公司 | A distance measuring sensor transmitter module and distance measuring sensor |
| CN112269161A (en) * | 2020-09-08 | 2021-01-26 | 上海大学 | Optical space positioning system and space positioning method thereof |
| CN112612014A (en) * | 2020-11-27 | 2021-04-06 | 西安知微传感技术有限公司 | High-performance MEMS laser radar receiving system |
| CN113030910A (en) * | 2019-12-09 | 2021-06-25 | 觉芯电子(无锡)有限公司 | Laser radar system |
| CN113406599A (en) * | 2021-07-08 | 2021-09-17 | 杭州森通电器配件有限公司 | Receiving objective lens and laser range finder |
| CN113655487A (en) * | 2021-09-16 | 2021-11-16 | 中国电子科技集团公司第四十四研究所 | Front-end device for continuous field-of-view laser short-range detection |
| CN113721250A (en) * | 2021-08-30 | 2021-11-30 | 中国电子科技集团公司第四十四研究所 | Discrete visual field laser short-range detection front-end device |
| DE102016208713B4 (en) | 2016-05-20 | 2022-12-22 | Ifm Electronic Gmbh | Photoelectric sensor |
| CN119471638A (en) * | 2025-01-16 | 2025-02-18 | 深圳市意普兴科技有限公司 | Diffuse reflection safety grating |
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| DE102013020572B4 (en) * | 2013-12-13 | 2016-11-17 | Balluff Gmbh | Optoelectronic sensor |
| JP7354716B2 (en) * | 2019-09-20 | 2023-10-03 | 株式会社デンソーウェーブ | Laser radar equipment and lenses for laser radar equipment |
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| JPH1184287A (en) * | 1997-09-08 | 1999-03-26 | Ricoh Co Ltd | Optical scanner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2013013488A1 (en) * | 2011-07-22 | 2013-01-31 | 江苏徕兹光电科技有限公司 | Optical system structure of laser range finder |
| EP2701209A4 (en) * | 2012-03-15 | 2015-12-23 | Omron Tateisi Electronics Co | REFLECTIVE PHOTOELECTRIC SENSOR |
| JP2013197109A (en) * | 2012-03-15 | 2013-09-30 | Omron Corp | Reflection type photoelectric sensor |
| CN102645738A (en) * | 2012-04-23 | 2012-08-22 | 南京德朔实业有限公司 | Laser range finder and condensing mirror applicable for receiving light of laser range finder |
| CN103293529A (en) * | 2012-06-04 | 2013-09-11 | 南京德朔实业有限公司 | Laser ranging device |
| CN104035099A (en) * | 2013-03-08 | 2014-09-10 | 江苏徕兹光电科技有限公司 | Dual-transmitting dual-receiving phase measurement-based calibration method and range finding device |
| CN104035099B (en) * | 2013-03-08 | 2017-02-01 | 江苏徕兹测控科技有限公司 | Dual-transmitting dual-receiving phase measurement-based calibration method and range finding device |
| CN104457689A (en) * | 2013-09-25 | 2015-03-25 | 北京航天计量测试技术研究所 | An Optical Transceiver Structure for Short-range Laser Range Finder |
| CN104457689B (en) * | 2013-09-25 | 2017-06-20 | 北京航天计量测试技术研究所 | A kind of optics receiving structure for closely laser range finder |
| CN104833966A (en) * | 2015-05-22 | 2015-08-12 | 南京爱立光电有限公司 | Laser-ranging optical system |
| EP3168642A1 (en) * | 2015-11-13 | 2017-05-17 | Sick Ag | Optoelectronic sensor and method for detecting an object |
| US10761193B2 (en) | 2015-11-13 | 2020-09-01 | Sick Ag | Optoelectronic sensor and method for detecting an object |
| DE102016208713B4 (en) | 2016-05-20 | 2022-12-22 | Ifm Electronic Gmbh | Photoelectric sensor |
| CN109196378A (en) * | 2016-06-29 | 2019-01-11 | 苹果公司 | Optical system for remote sensing receiver |
| CN109196378B (en) * | 2016-06-29 | 2022-12-06 | 苹果公司 | Optical systems for remote sensing receivers |
| CN113030910A (en) * | 2019-12-09 | 2021-06-25 | 觉芯电子(无锡)有限公司 | Laser radar system |
| CN111491444A (en) * | 2020-05-19 | 2020-08-04 | 常州纵慧芯光半导体科技有限公司 | A distance measuring sensor transmitter module and distance measuring sensor |
| CN111491444B (en) * | 2020-05-19 | 2021-07-27 | 常州纵慧芯光半导体科技有限公司 | Range finding sensor transmission module and range finding sensor |
| CN112269161A (en) * | 2020-09-08 | 2021-01-26 | 上海大学 | Optical space positioning system and space positioning method thereof |
| CN112269161B (en) * | 2020-09-08 | 2022-12-23 | 上海大学 | Optical spatial positioning system and its spatial positioning method |
| CN112612014A (en) * | 2020-11-27 | 2021-04-06 | 西安知微传感技术有限公司 | High-performance MEMS laser radar receiving system |
| CN113406599A (en) * | 2021-07-08 | 2021-09-17 | 杭州森通电器配件有限公司 | Receiving objective lens and laser range finder |
| CN113721250A (en) * | 2021-08-30 | 2021-11-30 | 中国电子科技集团公司第四十四研究所 | Discrete visual field laser short-range detection front-end device |
| CN113721250B (en) * | 2021-08-30 | 2024-11-15 | 中国电子科技集团公司第四十四研究所 | A discrete field of view laser short-range detection front-end device |
| CN113655487A (en) * | 2021-09-16 | 2021-11-16 | 中国电子科技集团公司第四十四研究所 | Front-end device for continuous field-of-view laser short-range detection |
| CN113655487B (en) * | 2021-09-16 | 2024-08-13 | 中国电子科技集团公司第四十四研究所 | Continuous field laser short-range detection front-end device |
| CN119471638A (en) * | 2025-01-16 | 2025-02-18 | 深圳市意普兴科技有限公司 | Diffuse reflection safety grating |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102313882B (en) | 2015-07-29 |
| WO2013013488A1 (en) | 2013-01-31 |
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