CN202649467U - Laser distance measurement device - Google Patents
Laser distance measurement device Download PDFInfo
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- CN202649467U CN202649467U CN2012202608662U CN201220260866U CN202649467U CN 202649467 U CN202649467 U CN 202649467U CN 2012202608662 U CN2012202608662 U CN 2012202608662U CN 201220260866 U CN201220260866 U CN 201220260866U CN 202649467 U CN202649467 U CN 202649467U
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- curved surface
- receiving objective
- ranging system
- laser ranging
- receiving
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Abstract
The utility model provides a laser distance measurement device. The laser distance measurement device comprises a laser module set which is used to generate collimated measurement light beams; a receiving objective lens which is provided with a first curved surface used for receiving reflective light beams from a measured object, wherein an optical axis of the receiving objective lens is parallel to an emergent light axis of the measurement light beams; and a photoelectric converter which is used for performing photoelectric conversion on an image on a focal plane of the receiving objective lens imaged by the reflective light beams, wherein a light-receiving surface of the photoelectric converter is arranged at the focal plane of the receiving objective lens. The receiving objective lens is also provided with a second curved surface of which the curvature is different from that of the first curved surface, wherein the second curved surface is used for partially focusing the reflective light beams that pass through the receiving objective lens on the focal plane to form a continuous light band. The laser distance measurement device of the utility model can effectively improve the measurement accuracy of a short-distance measurement object.
Description
Technical field
The utility model relates to a kind of laser ranging system, belongs to the optical device field.
Background technology
Laser range finder is to utilize laser the distance of target to be carried out the instrument of Accurate Determining.The basic structure of laser range finder is: contain a laser generator; Collimator objective or a collimating mirror group that is positioned at the laser generator transmitting terminal is used for the laser that laser generator sends being transformed into a branch of alignment measurement light beam and launching; A receiving objective is used for receiving reflection measurement light beam and the focal imaging that reflects from testee; A photoelectric commutator that is arranged on stadimeter inside is used for receiving the imaging of reflection measurement light beam and light signal is converted to corresponding electric signal, and the light-sensitive surface of photoelectric commutator is positioned on the focal plane of receiving objective, and this electric signal draws the range finding result after treatment.
In the larger situation of distance that determination object leaves, the measuring beam of incident is substantially parallel with the light path of reflection measurement light beam, thus the reflection measurement light beam through receiving objective post-concentration collection on the receiving area of optical signal receiver.But, leave nearer situation for determination object, as shown in Figure 1, the reflection measurement light beam of determined object diffusion has large inclination with respect to the optical axis of receiving objective, through the position of receiving objective post-concentration collection in the receiving area of departing from optical signal receiver, be difficult to imaging on the receiving area of optical signal receiver, so that the range finding difficult.
The existing means that address the above problem have: 1, adopt the optical pickup apparatus (APD) of elongated shape, the imaging after focusing in order to the reflection ray that receives close-in measurement adopts the needs of the method to make especially APD, and versatility is poor, and cost is higher; 2, at receiving objective two secondary lens nested or that separate are set, folded light beam can form 3 hot spots after focusing on through receiving objective during mensuration, and more in-plant measurement, above-mentioned 3 hot spots will join and conversion mutually, and the folded light beam through nearlyer measuring object can be received by optical signal receiver.Adopt the method, owing to need additionally at main receiving objective 2 secondary lens are set, manufacturing accuracy is required high, and accurately to join and change 3 hot spots are difficulties comparatively.
Summary of the invention
For solving the deficiencies in the prior art, the purpose of this utility model is to provide a kind of laser ranging system, folded light beam Receiver Problem in the time of can effectively solving the close-in measurement of integrated with distance measurement device, behind the first surface and second curved surface gathering of folded light beam through receiving objective of close-in measurement object diffusion, pool a continuous light belt that is positioned at the focal plane.
In order to realize above-mentioned target, the utility model provides a kind of laser ranging system, comprising:
One laser module is for generation of the measuring beam of collimation;
One receiving objective is formed with first surface and is used for reception from the folded light beam of determination object, and the optical axis of this receiving objective is parallel with the emergent light axis of described measuring beam;
One photoelectric commutator is used for described folded light beam imaging on the focal plane of described receiving objective is carried out opto-electronic conversion, and the sensitive surface of this photoelectric commutator is positioned on the focal plane of receiving objective;
It is characterized in that described receiving objective also is formed with the second curved surface of the curvature that is different from described first surface, this second curved surface is used for partly will gathering through the folded light beam of receiving objective continuous light belt of formation on the focal plane.
Aforesaid laser ranging system is characterized in that, the tangent slope of described the second curved surface is linear change.
Aforesaid laser ranging system is characterized in that, the tangent slope of described the second curved surface is quafric curve to be changed.
Aforesaid laser ranging system is characterized in that, described the second curved surface is a kind of in cylinder or the sphere.
Aforesaid laser ranging system is characterized in that, described receiving objective constitutes the straight lens of one side projection one side, and described the second curved surface is formed at straight one side highlightedly.
Aforesaid laser ranging system is characterized in that, described receiving objective constitutes the straight lens of one side projection one side, and described the second curved surface canyon topography is formed in straight one side.
Aforesaid laser ranging system is characterized in that, described photoelectric commutator receives the light beam that described the second curved surface is assembled.
Usefulness of the present utility model is: a kind of laser ranging system is provided, can effectively receive the sensitive surface that the outgoing measuring beam is beaten the scattered light that produces at closer object and converged to photoelectric commutator, simple in structure, realize easily, promote range capability, especially improve the measuring accuracy to the close-in measurement object.
Description of drawings
Fig. 1 is the principle schematic of existing laser ranging system when closely finding range;
Fig. 2 is the principle schematic of the utility model laser ranging system when closely finding range;
Fig. 3 is the light belt synoptic diagram of the utility model laser ranging system when closely finding range;
Fig. 4 a-4b is the synoptic diagram of the second curved surface of the utility model laser ranging system;
Fig. 5 is the synoptic diagram of the another embodiment of the second curved surface of the utility model laser ranging system.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is done concrete introduction.
With reference to Fig. 2, laser ranging system of the present utility model comprises: laser module 1, and for generation of the measuring beam 2 of collimation, and directive measuring object M; Receiving objective 3, it is formed with first surface 31 and is used for reception from the folded light beam 10 of determination object M, and the optical axis 7 of this receiving objective 3 is parallel with the emergent light axis 6 of described measuring beam 2; Photoelectric commutator 4 is used for described folded light beam 10 imaging on the focal plane 8 of described receiving objective is carried out opto-electronic conversion, and the sensitive surface 9 of this photoelectric commutator 4 is positioned on the focal plane of receiving objective 8; Wherein, described receiving objective 3 also is formed with the second curved surface 32 of the curvature that is not used in described first surface 31, and this second curved surface 43 is used for partly will gathering through the folded light beam of receiving objective 3 continuous light belt 11 of formation on the focal plane 8.Namely, inject first surface 31 refractions of receiving objective 3 through the folded light beam 10 of measuring object reflection after, partly through the second curved surface 32, and be gathered into the continuous light belt 11 of specific dimensions and light intensity.This continuous light belt 11 gathers the sensitive surface 9 of photoelectric commutator 4, as shown in Figure 3.
In certain embodiments, the tangent slope of the second curved surface 32 is linear change, such as on the arc surface continuous one section, shown in Fig. 4 a.In other embodiment, the tangent slope of the second curved surface 32 is the variation of quafric curve.Shown in Fig. 4 b, change the 32a of first and/or the second portion 32b of the second curved surface 32, can obtain the continuous light belt 11 of difformity, light intensity etc.
In certain embodiments, receiving objective 3 is configured to the straight lens 3 of one side projection one side, and first surface 31 is formed at the one side of its projection, and the second curved surface 32 is formed at its straight one side.In a preferred embodiment, the second curved surface 32 is formed at the straight one side of receiving objective 3 highlightedly, as shown in Figure 2; The second curved surface 32 also can be the straight one side that canyon topography is formed in receiving objective 3, as shown in Figure 5.
In certain embodiments, the second curved surface 32 is configured to a kind of cylinder, and in some other embodiment, the second curved surface 32 is configured to a kind of sphere.Apparently, according to instruction of the present invention, the second curved surface 32 of the present utility model can be any curved surface that can form continuous light belt 11 on focal plane 8 with linear change characteristic.
In certain embodiments, can also do coating film treatment to the surface of the second curved surface 32, in order to the impact of reduce disturbance light on range operation.
When laser ranging system of the present utility model carries out range operation to the telemeasurement object, measuring beam 2 and directive measuring object M that laser module 1 produces, after measuring object M diffusion, form the approximate folded light beam 10 that is parallel to the incident light axis 6 of measuring beam, folded light beam 10 is through being gathered in the sensitive surface 9(light signal receiving area of the photoelectric commutator 4 that is positioned at focal plane 8 after the focusing of receiving objective 3), this photoelectric commutator 4 light signal that receives is converted to electric signal and process by a processor (not shown) after draw the range finding result.This moment, photoelectric commutator 4 can receive the light beam of receiving objective 3 projection, and drew the range finding result based on the light beam imaging of this projection.
Laser ranging system of the present utility model is to closely or super close distance measuring object when carrying out range operation, measuring beam 2 and directive measuring object M that laser module 1 produces, because object M to be measured and receiving objective 3 distances are less, therefore the folded light beam after measuring object M diffusion 10 can with the optical axis 7 of receiving objective 3 at an angle, namely inject obliquely receiving objective 3, as shown in Figure 2, this folded light beam 10 is after first surface focuses on, partly inject the second curved surface 32, the reflection ray 10 that the second curved surface 32 is injected this part is assembled continuous light belt 11 of formation, express among Fig. 2 and Fig. 3 through the projecting beam 12 formed continuous light belts 11 after the gathering of the second curved surface the example row, this continuous light belt 11 still can cover the sensitive surface 9(light signal receiving area of photelectric receiver 4), therefore calculate the result of range finding.
Above-described embodiment does not limit the utility model in any form, and all employings are equal to replaces or technical scheme that the mode of equivalent transformation obtains, all drops in the protection domain of the utility model claims.
Claims (8)
1. laser ranging system comprises:
One laser module is for generation of the measuring beam of collimation;
One receiving objective is formed with first surface and is used for reception from the folded light beam of determination object, and the optical axis of this receiving objective is parallel with the emergent light axis of described measuring beam;
One photoelectric commutator is used for described folded light beam imaging on the focal plane of described receiving objective is carried out opto-electronic conversion, and the sensitive surface of this photoelectric commutator is positioned on the focal plane of receiving objective;
It is characterized in that described receiving objective also is formed with the second curved surface of the curvature that is different from described first surface, this second curved surface is used for partly will gathering through the folded light beam of receiving objective continuous light belt of formation on the focal plane.
2. laser ranging system as claimed in claim 1 is characterized in that, the tangent slope of described the second curved surface is linear change.
3. laser ranging system as claimed in claim 1 is characterized in that, the tangent slope of described the second curved surface is quafric curve to be changed.
4. laser ranging system as claimed in claim 1 is characterized in that, described the second curved surface is a kind of in cylinder or the sphere.
5. such as laser ranging system one of any among the claim 1-4, it is characterized in that described receiving objective constitutes the straight lens of one side projection one side, described the second curved surface is formed at straight one side highlightedly.
6. such as laser ranging system one of any among the claim 1-4, it is characterized in that described receiving objective constitutes the straight lens of one side projection one side, described the second curved surface canyon topography is formed in straight one side.
7. laser ranging system as claimed in claim 1 is characterized in that, described photoelectric commutator receives the light beam that described the second curved surface is assembled.
8. laser ranging system as claimed in claim 1 is characterized in that, described the second curved surface is through coating film treatment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202608662U CN202649467U (en) | 2012-06-04 | 2012-06-04 | Laser distance measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012202608662U CN202649467U (en) | 2012-06-04 | 2012-06-04 | Laser distance measurement device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202649467U true CN202649467U (en) | 2013-01-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012202608662U Expired - Fee Related CN202649467U (en) | 2012-06-04 | 2012-06-04 | Laser distance measurement device |
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| Country | Link |
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| CN (1) | CN202649467U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293529A (en) * | 2012-06-04 | 2013-09-11 | 南京德朔实业有限公司 | Laser ranging device |
| CN111060917A (en) * | 2019-12-27 | 2020-04-24 | 广东博智林机器人有限公司 | Laser ranging device and construction robot |
-
2012
- 2012-06-04 CN CN2012202608662U patent/CN202649467U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103293529A (en) * | 2012-06-04 | 2013-09-11 | 南京德朔实业有限公司 | Laser ranging device |
| CN111060917A (en) * | 2019-12-27 | 2020-04-24 | 广东博智林机器人有限公司 | Laser ranging device and construction robot |
| CN111060917B (en) * | 2019-12-27 | 2023-08-01 | 广东博智林机器人有限公司 | Laser ranging device and construction robot |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20150604 |
|
| EXPY | Termination of patent right or utility model |