CN202196168U - Optical system structure of laser range finder - Google Patents
Optical system structure of laser range finder Download PDFInfo
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- CN202196168U CN202196168U CN2011202669905U CN201120266990U CN202196168U CN 202196168 U CN202196168 U CN 202196168U CN 2011202669905 U CN2011202669905 U CN 2011202669905U CN 201120266990 U CN201120266990 U CN 201120266990U CN 202196168 U CN202196168 U CN 202196168U
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- range finder
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Abstract
The utility model relates to an optical system structure of a laser range finder, comprising a laser emitting light source, a collimating object lens arranged in front of the laser emitting light source, a light receiver, and a receiving object lens used for gathering reflected lights to the light receiver; wherein the receiving object lens is a free-form surface optical element consisting of an aspheric part and a hypertorus part; wherein the infinite reflected light passes through the aspheric part of the receiving object lens to focus on the light receiver; and the close-range reflected light passes through the hypertorus part of the receiving object lens to cover on a surface of the light receiver. The optical system structure of the utility model can satisfy high-accuracy requirements for a long-distance measurement and a close-range measurement; the optical system structure also has the advantages of simple structure, good measuring stability, and superior cost performance; and the optical system structure is beneficial to realize miniaturization.
Description
Technical field
The utility model patent 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.
Collimator objective 2 is parallel with receiving objective 4 optical axises.The light receiving surface 6 of optical receiver 5 is positioned on the focus A of receiving objective 4.In addition, in the receiving light path of emission light path, also has an interior light path, with the drift error that produces in the compensating circuit.
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.
The utility model content
The purpose of the utility model is to provide a kind of laser ranging optical system, can measure far and near distance through simple and reliable structure, and volume is little, and good cost performance is applicable to miniaturization structure.
The technical scheme of the utility model: 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.
In the utility model, the complex objective lens that said free form surface receiving objective is partly combined by non-spherical surface part and toroid.
In the utility model, described free form surface receiving objective comprises separate non-spherical surface lens and toroidal lens.
In the utility model, the compound lens that described free form surface receiving objective is formed by non-spherical surface lens and toroidal lens gummed.
In the utility model, the toroidal lens of described toroidal lens formula part.
The beneficial effect that the utlity model has: the utility model laser ranging optical system can satisfy remote and high-acruracy survey closely; And it is simple in structure; Good measuring stability, 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 the utility model patent;
Fig. 6, Fig. 7 are the perspective view and the view of the related a kind of typical toroidal lens of the utility model patent;
Fig. 8 is the optical system diagram of a kind of preferred implementation of the related optical system structure of the utility model patent.
[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 utility model and the effect of being 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 the said laser range finder of the utility model; 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 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 the said laser range finder of the utility model 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 the utility model patent.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.
The described aspheric surface of the utility model 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 the preferred embodiment of the utility model; Be not to be used for limiting the scope that the utility model is implemented; All equalizations of doing according to the described shape of the utility model claim scope, structure, characteristic and spirit change and modify, and all should be included in the claim scope of the utility model.
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 structure 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 (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202669905U CN202196168U (en) | 2011-07-22 | 2011-07-22 | 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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202669905U CN202196168U (en) | 2011-07-22 | 2011-07-22 | Optical system structure of laser range finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202196168U true CN202196168U (en) | 2012-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202669905U Withdrawn - After Issue CN202196168U (en) | 2011-07-22 | 2011-07-22 | Optical system structure of laser range finder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202196168U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313882A (en) * | 2011-07-22 | 2012-01-11 | 江苏徕兹光电科技有限公司 | Optical system structure of laser range finder |
| CN112034478A (en) * | 2019-06-03 | 2020-12-04 | 北醒（北京）光子科技有限公司 | Laser radar and ranging method thereof |
| CN113030910A (en) * | 2019-12-09 | 2021-06-25 | 觉芯电子(无锡)有限公司 | Laser radar system |
-
2011
- 2011-07-22 CN CN2011202669905U patent/CN202196168U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313882A (en) * | 2011-07-22 | 2012-01-11 | 江苏徕兹光电科技有限公司 | Optical system structure of laser range finder |
| CN102313882B (en) * | 2011-07-22 | 2015-07-29 | 江苏徕兹光电科技有限公司 | The optical system structure of laser range finder |
| CN112034478A (en) * | 2019-06-03 | 2020-12-04 | 北醒（北京）光子科技有限公司 | Laser radar and ranging method thereof |
| CN113030910A (en) * | 2019-12-09 | 2021-06-25 | 觉芯电子(无锡)有限公司 | Laser radar system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120418 Effective date of abandoning: 20150729 |
|
| RGAV | Abandon patent right to avoid regrant |