CN208705506U - A kind of lens group for laser radar - Google Patents
A kind of lens group for laser radar Download PDFInfo
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- CN208705506U CN208705506U CN201821395639.4U CN201821395639U CN208705506U CN 208705506 U CN208705506 U CN 208705506U CN 201821395639 U CN201821395639 U CN 201821395639U CN 208705506 U CN208705506 U CN 208705506U
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Abstract
The utility model discloses a kind of lens group for laser radar, which includes: at least one lens, at least one described lens has the plane of incidence and an exit facet, and the plane of incidence and the exit facet are convex surface, concave surface or any one of aspherical；Fixed device, for fixing at least one described lens.Lens group provided by the utility model for laser radar, structure is simple, is easy to adjustment, can effectively reduce on axis and off-axis aberration, collimating effect it is good, it can be achieved that laser radar accurately detecting.
Description
Technical field
The utility model relates to lens technology, in particular to a kind of lens group for laser radar.
Background technique
Laser radar is the radar system to emit the characteristic quantities such as the position of detecting laser beam target, speed.It is former from work
It is said in reason, the not basic difference with microwave radar: to objective emission detectable signal (laser beam), the slave mesh that then will receive
It marks reflected signal (target echo) to be compared with transmitting signal, after making proper treatment, so that it may obtain the related of target
Information, such as target range, orientation, height, speed, posture, even shape parameter, to be carried out to targets such as aircraft, guided missiles
Detection, tracking and identification.
Transmitting and reception system are the important components of laser radar, and required laser beam will have under normal conditions
Bigger beam diameter and the small angle of departure, and laser issue lasing beam diameter generally between 0.1mm to 1.0mm,
And there is certain angle of divergence, cannot directly meet actual demand.
Existing laser radar generallys use simple lens and collimates to Laser Output Beam, though this light-beam forming unit
Right structure is simple, facilitates economy, but aberration is big, and collimation is lower, leverages the detection accuracy of laser radar.
Utility model content
The purpose of this utility model is in view of the drawbacks of the prior art, to provide a kind of lens group for laser radar.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of lens group for laser radar, comprising:
At least one lens, at least one described lens have the plane of incidence and exit facet, the plane of incidence and the outgoing
Face is convex surface, concave surface or any one of aspherical；
Fixed device, for fixing at least one described lens.
Further, the lens group include include the first lens, the second lens and the third lens,
First lens, have the first surface and second surface being oppositely arranged, and the first surface is towards object side
Convex surface, the second surface be it is aspherical；
Second lens, have the third surface and the 4th surface being oppositely arranged, and the third surface is equipped with first
Recessed portion, the 4th surface are equipped with the second recessed portion；
The third lens, have the 5th surface and the 6th surface being oppositely arranged, and the 5th surface is aspherical, institute
Stating the 6th surface is the convex surface far from object side；
First lens, second lens and the third lens are arranged successively along optical axis direction from object side.
Further, the fixed device is lens barrel, for fixing first lens, second lens and described the
Three lens.
Further, the size of first lens, second lens and the third lens is all the same；
The maximum gauge that second lens are parallel to optical axis direction is greater than the third lens and is parallel to optical axis direction
Maximum gauge, and the third lens be parallel to optical axis direction maximum gauge be greater than first lens be parallel to optical axis direction
Maximum gauge.
Further, the depth of first recessed portion is greater than the depth of second recessed portion.
Preferably, first lens are meniscus shaped lens, and second lens are double concave lens, the third lens
For meniscus shaped lens.
Further, the lens barrel has cylindrical canister portion, and cartridge has been formed centrally within through-hole；The lens barrel
Also there is side frame portion, the side frame portion is equipped with multiple steps.
Further, the side frame portion is equipped with first step, second step and third step, wherein the First
Rank, the First terrace including first step side and with the first step staggered sideways；The second step, including second
Step side and second step face with the second step staggered sideways；The third step, including third step side and
Third step surface staggered with the third step side.
Further, the width of the First terrace is greater than the width of the third step surface, and is less than described second
The width of step surface.
Further, first is respectively equipped on the First terrace, the second step face and the third step surface
Groove, the second groove and third groove；First groove, second groove and the third groove are annular, and institute
The depth for stating the first groove, second groove and the third groove is all the same.
Further, the outer rim of first lens is equipped with the first protrusion to match with first groove shapes；Institute
The outer rim for stating the second lens is equipped with the second protrusion to match with second groove shapes；The outer rim of the third lens is equipped with
The third protrusion to match with the third groove shapes.
Preferably, the first lens, the second lens and the third lens are all made of optical glass and are made.
Compared with prior art, the utility model has the following beneficial effects:
Lens group provided by the utility model for laser radar, structure is simple, is easy to adjustment, can effectively reduce axis
Upper and off-axis aberration, collimating effect it is good, it can be achieved that laser radar accurately detecting.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is some embodiments of the utility model, for those of ordinary skill in the art, in the premise not made the creative labor
Under, it can also be obtained according to these attached drawings other attached drawings.
Fig. 1 is the main view of the lens group provided by the embodiment of the utility model for laser radar；
Fig. 2 is the top view of the lens group provided by the embodiment of the utility model for laser radar；
Fig. 3 is the right view of the lens group provided by the embodiment of the utility model for laser radar；
Fig. 4 is the A-A sectional view of Fig. 2；
Fig. 5 is the B-B sectional view of Fig. 3；
Fig. 6 is the stereoscopic schematic diagram of an angle of the lens barrel that the utility model embodiment one provides；
Fig. 7 is the stereoscopic schematic diagram of another angle of the lens barrel that the utility model embodiment one provides；
Fig. 8 is the stereoscopic schematic diagram for the lens barrel that the utility model embodiment two provides；
In figure: the first lens of 1-, 11- first surface, 12- second surface, 13- second side, the second lens of 2-, 21-
Three surfaces, the first recessed portion of 211-, the 4th surface 22-, the second recessed portion of 221-, the 4th side 23-, 3- the third lens, 31-
Five surfaces, the 6th surface 32-, the 6th side 33-, 4- lens barrel, 41- canister portion, the first riveted holes of 411-, the second riveted holes of 412-,
413- third riveted holes, 42- side frame portion, 421- first step, 4211- first step side, 4212- First terrace, 4213-
First groove, 422- second step, 4221- second step side, 4222- second step face, the second groove of 4223-, 423-
Three steps, 4231- third step side, 4232- third step surface, 4233- third groove.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Usually here in attached drawing description and
The component of the utility model embodiment shown can be arranged and be designed with a variety of different configurations.
Therefore, requirement is not intended to limit to the detailed description of the embodiments of the present invention provided in the accompanying drawings below
The scope of the utility model of protection, but it is merely representative of the selected embodiment of the utility model.Based in the utility model
Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all
Belong to the range of the utility model protection.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
It should be noted that in the absence of conflict, the feature in the embodiments of the present invention and embodiment can
To be combined with each other.
Embodiment one
A kind of lens group for laser radar is present embodiments provided, which may be used as the hair in laser radar
It penetrates microscope group or receives microscope group.Lens group provided in this embodiment for laser radar includes at least one lens, it is preferable that such as
Shown in Fig. 1-Fig. 5, which includes the first lens 1 being arranged successively since object side along optical axis direction, the second lens 2 and
Three lens 3.First lens 1 are meniscus shaped lens, have the first surface 11 and second surface 12 being oppositely arranged, described
First surface 11 is the convex surface towards object side, and the second surface 12 is aspherical；Second lens 2 are double concave lens,
It has the third surface 21 and the 4th surface 22 being oppositely arranged, and the third surface 21 is equipped with the first recessed portion 211, described
4th surface 22 is equipped with the second recessed portion 221；The third lens 3 are meniscus shaped lens, have the 5th be oppositely arranged
Surface 31 and the 6th surface 32, the 5th surface 31 be it is aspherical, the 6th surface 32 be far from object side convex surface.It is described
The refractive index of first lens 1 is between 1.5-1.7, and preferably 1.7.The refraction coefficient of second lens 2 is arrived between 1.64
Between 1.87, preferably 1.64.The refractive index of the third lens 3 is between 1.5-1.7, and preferably 1.57.
Preferably, the size of second lens 2 and first lens 1 and the third lens 3 is all the same；Described
The maximum gauge that two lens 2 are parallel to optical axis direction is greater than the maximum gauge that the third lens 3 are parallel to optical axis direction, and institute
It states the third lens 3 and is parallel to the maximum gauge of optical axis direction and be greater than first lens 1 and be parallel to the maximum gauge of optical axis direction.
Preferably, the full-size of the maximum width of first recessed portion 211 and the second recessed portion 221 and second lens 2 it
Than in the range of 0.8 to 0.95；The depth of first recessed portion 211 is greater than the depth of second recessed portion 221.
Further, the first lens 1 also have first side and second side 13.The first side constitutes the first lens
1 benchmark shape is partial cylinder face.The partial cylinder face is accurately formed in a manner of with light shaft coaxle.Therefore, described
First side can be used for the radial positioning of the first lens 1.The second side 13 is the plane parallel with optical axis, and shape is
In order to avoid what is be arranged for the purpose ofs interference etc. occurs when assembling with other component.Second lens 2 also have third side
Face and the 4th side 23.The third side constitutes the benchmark shape of the second lens 2, is partial cylinder face.The partial cylinder face
It is accurately formed in a manner of with light shaft coaxle.Therefore, the third side can be used for the radial positioning of the second lens 2.
4th side 23 is the plane parallel with optical axis, and shape is in order to avoid interference etc. occurs when assembling with other component
For the purpose of and be arranged.The third lens 3 also have the 5th side and the 6th side 33.It is saturating that 5th side constitutes third
The benchmark shape of mirror 3 is partial cylinder face.The partial cylinder face is accurately formed in a manner of with light shaft coaxle.Therefore, institute
Stating the 5th side can be used for the radial positioning of the third lens 3.6th side 33 is the plane parallel with optical axis, shape
It is in order to avoid being arranged for the purpose ofs interference etc. occurs when assembling with other component.
Preferably, the material of first lens 1, second lens 2 and the third lens 3 can use appropriate
Optical glass, so that first lens 1, second lens 2 and the third lens 3 will not become due to hot riveting
Shape.The manufacturing method of first lens 1, second lens 2 and the third lens 3 can be using machining or glass
Mould process.
The lens group further includes fixed device, it is preferable that shown in as shown in Figure 1, Figure 2, Fig. 3, Fig. 4 and Fig. 6, which is
Lens barrel 4, the lens barrel 4 is C-shaped, and with canister portion 41, cartridge 41 is cylindrical, has been formed centrally within through-hole；And side
Frame portion 42, the side frame portion 42 are equipped with multiple steps, and in the present embodiment, the side frame portion 42 has first step 421, the
Two steps 422 and third step 423.It should be noted that the present embodiment is by way of example only, but not limited to this, actually answering
In, the quantity of step can be adjusted according to actual needs.Specifically, the first step 421 includes first step side
4211 and First terrace 4212 staggered with the first step side 4211；The second step 422 includes second step
Side 4221 and second step face 4222 staggered with the second step side 4221；Third step 423 includes third step
Side 4231 and third step surface 4232 staggered with the third step side 4231.Wherein, the First terrace 4212
Width be greater than the third step surface 4232 width, and be less than the second step face 4222 width.The First
The height of rank side 4211 is greater than the height of the second step side 4221, and is less than the height of the third step side 4231
Degree.It is recessed that first is respectively equipped on the First terrace 4212, the second step face 4222 and the third step surface 4232
Slot 4213, the second groove 4223 and third groove 4233.Preferably, first groove 4213,4223 and of the second groove
The third groove 4233 is annular, and first groove 4213, second groove 4223 and the third groove
4233 depth is all the same.It should be noted that first groove 4213, second groove 4223 and the third groove
4233 width can be arranged according to actual needs, it is preferable that the maximum width of first groove 4213 and described the
The ratio between maximum width of one step surface 4212 in the range of 1/4-1/3, the maximum width of second groove 4223 with it is described
The ratio between the maximum width in second step face 4222 is in the range of 1/5-1/3, the maximum width of the third groove 4233 and institute
The ratio between maximum width of third step surface 4232 is stated in the range of 1/3-1/2.
As shown in fig. 7, cartridge 41 is equipped with the first caulking part, the second caulking part and third caulking part.Described first
Caulking part includes three the first riveted holes 411, carries out hot riveting to first caulking part by rivet hot connection device and forms the
One riveting fixed part, the first riveting fixed part are formed in first groove 4213, and thus, it is possible to fixations described first
Lens 1.Second caulking part includes three the second riveted holes 412, is carried out by rivet hot connection device to second caulking part
Hot riveting and form the second riveting fixed part, it is described second riveting fixed part is formed in second groove 4223, thus, it is possible to
Enough fix second lens 2.The third caulking part includes three third riveted holes 413, by rivet hot connection device to described
Third caulking part carries out hot riveting and forms third riveting fixed part, and the third riveting fixed part is formed in the third groove
In 4233, thus, it is possible to the fixation the third lens 3.
Preferably, can by mold to thermoplastic resin appropriate such as polycarbonate resin, ABS resin etc. carry out at
Shape manufactures the lens barrel 4.
Lens group provided in this embodiment for laser radar, structure is simple, is easy to adjustment, can effectively reduce on axis
And off-axis aberration, collimating effect it is good, it can be achieved that laser radar accurately detecting.
Embodiment two
A kind of lens group for laser radar is present embodiments provided, which may be used as the hair in laser radar
It penetrates microscope group or receives microscope group.Lens group provided in this embodiment for laser radar includes at least one lens, it is preferable that such as
Shown in Fig. 1-Fig. 5, which includes the first lens 1 being arranged successively since object side along optical axis direction, the second lens 2 and
Three lens 3.First lens 1 are meniscus shaped lens, have the first surface 11 and second surface 12 being oppositely arranged, described
First surface 11 is the convex surface towards object side, and the second surface 12 is aspherical；Second lens 2 are double concave lens,
It has the third surface 21 and the 4th surface 22 being oppositely arranged, and the third surface 21 is equipped with the first recessed portion 211, described
4th surface 22 is equipped with the second recessed portion 221；The third lens 3 are meniscus shaped lens, have the 5th be oppositely arranged
Surface 31 and the 6th surface 32, the 5th surface 31 be it is aspherical, the 6th surface 32 be far from object side convex surface.It is described
The refractive index of first lens 1 is between 1.5-1.7, and preferably 1.7.The refraction coefficient of second lens 2 is arrived between 1.64
Between 1.87, preferably 1.64.The refractive index of the third lens 3 is between 1.5-1.7, and preferably 1.57.
Preferably, the size of second lens 2 and first lens 1 and the third lens 3 is all the same；Described
The maximum gauge that two lens 2 are parallel to optical axis direction is greater than the maximum gauge that the third lens 3 are parallel to optical axis direction, and institute
It states the third lens 3 and is parallel to the maximum gauge of optical axis direction and be greater than first lens 1 and be parallel to the maximum gauge of optical axis direction.
Preferably, the full-size of the maximum width of first recessed portion 211 and the second recessed portion 221 and second lens 2 it
Than in the range of 0.8 to 0.95；The depth of first recessed portion 211 is greater than the depth of second recessed portion 221.
Further, the first lens 1 also have first side and second side 13.The first side constitutes the first lens
1 benchmark shape is partial cylinder face.The partial cylinder face is accurately formed in a manner of with light shaft coaxle.Therefore, described
First side can be used for the radial positioning of the first lens 1.The second side 13 is the plane parallel with optical axis, and shape is
In order to avoid what is be arranged for the purpose ofs interference etc. occurs when assembling with other component.Second lens 2 also have third side
Face and the 4th side 23.The third side constitutes the benchmark shape of the second lens 2, is partial cylinder face.The partial cylinder face
It is accurately formed in a manner of with light shaft coaxle.Therefore, the third side can be used for the radial positioning of the second lens 2.
4th side 23 is the plane parallel with optical axis, and shape is in order to avoid interference etc. occurs when assembling with other component
For the purpose of and be arranged.The third lens 3 also have the 5th side and the 6th side 33.It is saturating that 5th side constitutes third
The benchmark shape of mirror 3 is partial cylinder face.The partial cylinder face is accurately formed in a manner of with light shaft coaxle.Therefore, institute
Stating the 5th side can be used for the radial positioning of the third lens 3.6th side 33 is the plane parallel with optical axis, shape
It is in order to avoid being arranged for the purpose ofs interference etc. occurs when assembling with other component.
Preferably, the material of first lens 1, second lens 2 and the third lens 3 can use appropriate
Optical glass, so that first lens 1, second lens 2 and the third lens 3 will not become due to hot riveting
Shape.The manufacturing method of first lens 1, second lens 2 and the third lens 3 can be using machining or glass
Mould process.
The lens group further includes fixed device, it is preferable that shown in as shown in Figure 1, Figure 2, Fig. 3, Fig. 4 and Fig. 8, which is
Lens barrel 4, the lens barrel 4 is C-shaped, and with canister portion 41, cartridge 41 is cylindrical, has been formed centrally within through-hole；And side
Frame portion 42, the side frame portion 42 are equipped with multiple steps, and in the present embodiment, the side frame portion 42 has first step 421, the
Two steps 422 and third step 423.It should be noted that the present embodiment is by way of example only, but not limited to this, actually answering
In, the quantity of step can be adjusted according to actual needs.Specifically, the first step 421 includes first step side
4211 and First terrace 4212 staggered with the first step side 4211；The second step 422 includes second step
Side 4221 and second step face 4222 staggered with the second step side 4221；Third step 423 includes third step
Side 4231 and third step surface 4232 staggered with the third step side 4231.Wherein, the First terrace 4212
Width be greater than the third step surface 4232 width, and be less than the second step face 4222 width.The First
The height of rank side 4211 is greater than the height of the second step side 4221, and is less than the height of the third step side 4231
Degree.It is recessed that first is respectively equipped on the First terrace 4212, the second step face 4222 and the third step surface 4232
Slot 4213, the second groove 4223 and third groove 4233.Preferably, first groove 4213,4223 and of the second groove
The third groove 4233 is annular, and first groove 4213, second groove 4223 and the third groove
4233 depth is all the same.It should be noted that first groove 4213, second groove 4223 and the third groove
4233 width can be arranged according to actual needs, it is preferable that the maximum width of first groove 4213 and described the
The ratio between maximum width of one step surface 4212 in the range of 1/4-1/3, the maximum width of second groove 4223 with it is described
The ratio between the maximum width in second step face 4222 is in the range of 1/5-1/3, the maximum width of the third groove 4233 and institute
The ratio between maximum width of third step surface 4232 is stated in the range of 1/3-1/2.
Further, the outer rim of first lens 1 be equipped with match with 4213 shape of the first groove it is first convex
(not shown) is played, first lens 1 are caught in first groove 4213 by the first protrusion, make first lens
1 is assembled integrally with the lens barrel 4；The outer rim of second lens 2, which is equipped with, to match with 4223 shape of the second groove
Second raised (not shown), second lens 2 are caught in second groove 4223 by second protrusion, make institute
The second lens 2 are stated to be assembled integrally with the lens barrel 4；The outer rim of the third lens 3 is equipped with and 4233 shape of third groove
The third protrusion (not shown) that shape matches, the third lens 3 are caught in the third groove by the third protrusion
In 4233, it is assembled integrally the third lens 3 with the lens barrel 4.
Preferably, can by mold to thermoplastic resin appropriate such as polycarbonate resin, ABS resin etc. carry out at
Shape manufactures the lens barrel 4.
Lens group provided in this embodiment for laser radar, structure is simple, is easy to adjustment, can effectively reduce on axis
And off-axis aberration, collimating effect it is good, it can be achieved that laser radar accurately detecting.
It should be understood that the above-mentioned specific embodiment of the utility model is used only for exemplary illustration or explains that this is practical
Novel principle, without constituting limitations of the present invention.Therefore, in the feelings of the spirit and scope without departing from the utility model
Any modification, equivalent substitution, improvement and etc. done under condition, should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of lens group for laser radar characterized by comprising
At least one lens, at least one described lens have the plane of incidence and exit facet, and the plane of incidence and the exit facet are
Convex surface, concave surface or any one of aspherical；
Fixed device, for fixing at least one described lens.
2. the lens group according to claim 1 for laser radar, which is characterized in that including the first lens (1), second
Lens (2) and the third lens (3),
First lens (1) have the first surface (11) and second surface (12) being oppositely arranged, the first surface (11)
For towards the convex surface of object side, the second surface (12) is aspherical；
Second lens (2) have the third surface (21) and the 4th surface (22) being oppositely arranged, the third surface (21)
It is equipped with the first recessed portion (211), the 4th surface (22) is equipped with the second recessed portion (221)；
The third lens (3) have the 5th surface (31) and the 6th surface (32) being oppositely arranged, the 5th surface (31)
To be aspherical, the 6th surface (32) is the convex surface far from object side；
First lens (1), second lens (2) and the third lens (3) are successively arranged along optical axis direction from object side
Column.
3. the lens group according to claim 2 for laser radar, which is characterized in that the fixed device is lens barrel
(4), for fixing first lens (1), second lens (2) and the third lens (3).
4. the lens group according to claim 2 for laser radar, which is characterized in that first lens (1), described
The size of second lens (2) and the third lens (3) is all the same；
The maximum gauge that second lens (2) are parallel to optical axis direction is greater than the third lens (3) and is parallel to optical axis direction
Maximum gauge, and the third lens (3) be parallel to optical axis direction maximum gauge be greater than first lens (1) be parallel to
The maximum gauge of optical axis direction.
5. the lens group according to claim 2 for laser radar, which is characterized in that first lens (1) are curved
Moon-shaped lens, second lens (2) are double concave lens, and the third lens (3) are meniscus shaped lens.
6. the lens group according to claim 3 for laser radar, which is characterized in that the lens barrel (4) has in circle
The canister portion (41) of tubular, cartridge (41) have been formed centrally within through-hole；The lens barrel (4) also has side frame portion (42), described
Side frame portion (42) is equipped with multiple steps.
7. the lens group according to claim 6 for laser radar, which is characterized in that the side frame portion (42) is equipped with
First step (421), second step (422) and third step (423), wherein
The first step (421), including it is first step side (4211) and staggered with the first step side (4211)
First terrace (4212)；
The second step (422), including it is second step side (4221) and staggered with the second step side (4221)
Second step face (4222)；
The third step (423), including third step side (4231) and staggered with the third step side (4231)
Third step surface (4232).
8. the lens group according to claim 7 for laser radar, which is characterized in that the First terrace (4212)
Width be greater than the third step surface (4232) width, and be less than the second step face (4222) width.
9. the lens group according to claim 8 for laser radar, which is characterized in that the First terrace
(4212), the first groove (4213), are respectively equipped on the second step face (4222) and the third step surface (4232)
Two grooves (4223) and third groove (4233)；
First groove (4213), second groove (4223) and the third groove (4233) are annular, and described
The depth of first groove (4213), second groove (4223) and the third groove (4233) is all the same.
10. the lens group according to claim 9 for laser radar, which is characterized in that outside first lens (1)
Edge is equipped with the first protrusion to match with the first groove (4213) shape；
The outer rim of second lens (2) is equipped with the second protrusion to match with the second groove (4223) shape；
The outer rim of the third lens (3) is equipped with the third protrusion to match with third groove (4233) shape.
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| CN201821395639.4U CN208705506U (en) | 2018-08-28 | 2018-08-28 | A kind of lens group for laser radar |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821395639.4U CN208705506U (en) | 2018-08-28 | 2018-08-28 | A kind of lens group for laser radar |
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