CN208737107U - A kind of annular beam converting means - Google Patents
A kind of annular beam converting means Download PDFInfo
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- CN208737107U CN208737107U CN201821585097.7U CN201821585097U CN208737107U CN 208737107 U CN208737107 U CN 208737107U CN 201821585097 U CN201821585097 U CN 201821585097U CN 208737107 U CN208737107 U CN 208737107U
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- annular beam
- lens
- tubular reflector
- reflector
- optical path
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Abstract
The utility model relates to a kind of annular beam converting means, belong to laser beam control technology field, described device includes condenser lens, tubular reflector and collimation lens, condenser lens is for being focused annular beam, annular beam after focusing is incident to the inner wall of tubular reflector from one end of tubular reflector, annular beam after inner wall reflects is exported from the other end of tubular reflector, collimation lens is for collimating the annular beam exported through tubular reflector, the utility model structure novel and simple, it is at low cost, it is reflected using the inner wall of tubular reflector mirror, condenser lens and collimation lens is cooperated to realize any transformation of annular beam internal diameter and outer diameter, it is practical.
Description
Technical field
The utility model belongs to laser beam control technology field, relates in particular to a kind of annular beam converting means.
Background technique
Annular beam is a kind of beam pattern common in superpower laser and high-energy laser.Ring is applied certain
Under border, the internal diameter to annular beam, outer diameter is needed to carry out any transformation, to reach the coupling with other optical systems, realized special
Determine the purpose of function, such as laser parameter measurement, wavefront correction.Currently, the method for realizing annular beam transformation is broadly divided into two
Kind: one is optical beam transformation is realized using lens group, as shown in Figure 1, this method is merely able to realize annular beam internal diameter, outer diameter
It is converted Deng ratio, there are relationships for the light beam before and after converting:Internal diameter, outer diameter size can not arbitrarily be adjusted.Another kind is
Reflective annular beam transform method converts front and back as shown in Fig. 2, the same variation of inner and outer ring may be implemented in this method
There are relationships for light beam, and: R1-R2=R1 '-R2 ' can not change the size of light beam annulus.
Utility model content
For various deficiencies of the prior art, to solve the above-mentioned problems, it is proposed that one kind can arbitrarily adjust internal diameter and
The annular beam converting means of outer diameter.
To achieve the above object, the utility model provides the following technical solutions:
A kind of annular beam converting means, comprising:
Condenser lens is located in the transmission optical path of annular beam, for being focused to annular beam；
Tubular reflector is arranged along the transmission optical path of annular beam, and annular beam after focusing is from tubular reflector
One end be incident to the inner wall of tubular reflector, the other end of annular beam from tubular reflector after inner wall reflects 1 time is defeated
Out, the transmission optical path of the central axis of the tubular reflector, the optical axis of condenser lens and annular beam is overlapped, and tubulose is anti-
Emitter and the minimum spacing of condenser lens are greater than the focal length of condenser lens；
And collimation lens, it is located in the transmission optical path of annular beam, for the ring light exported through tubular reflector
Shu Jinhang collimation.
Further, the optical axis of the collimation lens is overlapped with the transmission optical path of annular beam, and the light passing of collimation lens half
Diameter is greater than the outer diameter of the annular beam exported through tubular reflector.
Further, the collimation lens is rotated by the subregion being located on ordinary lens around the transmission optical path of annular beam
360 ° of formation, the subregion are the light passing radius of collimation lens.
Further, the optical axis of the ordinary lens is parallel with the transmission optical path of annular beam, and the tubular reflector is along it
Circumferentially it is divided into several reflector sub-blocks, is in the ring after the reflection of the reflector sub-block in same vertical plane with the optical axis of ordinary lens
The extending line intersection point of shaped light beam is located on the optical axis of ordinary lens.
Further, the outer diameter of the annular beam is R1, internal diameter R2, the ring light exported after collimated collimated
The outer diameter of beam is R1', and internal diameter R2', the focal length of condenser lens is f, and the internal diameter of tubular reflector is R, the coke of condenser lens
The distance of point to collimation lens is L, then
In addition, the utility model also provides a kind of transform method of annular beam converting means, include the following steps:
S1: annular beam gathers as incident beam, outer diameter R1, internal diameter R2, incident beam by condenser lens
Burnt and diverging is transmitted to tubular reflector, and the focal length of condenser lens is f, and the internal diameter of tubular reflector is R；
S2: incident beam, which is reflected 1 time and exported on the inner wall of tubular reflector, forms outgoing beam, and outgoing beam is through standard
Straight collimated forms output beam at directional light and output, and the distance of focus to the collimation lens of condenser lens is L, described defeated
Light beam is transformed annular beam, outer diameter R1', internal diameter R2' out；
S3: by adjusting f, R and L, any adjusting of output beam internal diameter and outer diameter is realized.
Further,
Further, the optical axis of the collimation lens is overlapped with the transmission optical path of annular beam, and the light passing of collimation lens half
Diameter is greater than the outer diameter of outgoing beam.
Further, the collimation lens is rotated by the subregion being located on ordinary lens around the transmission optical path of annular beam
360 ° of formation, the subregion are the light passing radius of collimation lens.
Further, the optical axis of the ordinary lens is parallel with the transmission optical path of annular beam, and the tubular reflector is along it
Circumferentially it is divided into several reflector sub-blocks, is in the ring after the reflection of the reflector sub-block in same vertical plane with the optical axis of ordinary lens
The extending line intersection point of shaped light beam is located on the optical axis of ordinary lens.
The beneficial effects of the utility model are:
Structure novel and simple, it is at low cost, it is reflected using the inner wall of tubular reflector mirror, cooperates condenser lens and collimation lens
Realize any transformation of annular beam internal diameter and outer diameter, it is practical.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that optical beam transformation is realized using lens group；
Fig. 2 is the structural schematic diagram of reflective annular beam transform method；
Fig. 3 is the overall structure diagram of the utility model；
Fig. 4 is the light path schematic diagram of the utility model；
Fig. 5 is the wavefront distribution map of annular beam in embodiment two；
Fig. 6 is the wavefront distribution map of annular beam in embodiment three.
In attached drawing: 1- condenser lens, 2- tubular reflector, 3- ordinary lens, 4- annular beam, the transformed ring light of 5-
Beam, 6- collimation lens.
Wherein, in Fig. 1, Fig. 2 and Fig. 4, R1 indicates that the outer diameter of the annular beam before transformation, R2 indicate the ring light before transformation
The internal diameter of beam, R1' indicate that the outer diameter of transformed annular beam, R2' indicate the internal diameter of transformed annular beam.
Specific embodiment
In order to make those skilled in the art more fully understand the technical solution of the utility model, below with reference to the utility model
Attached drawing carries out clear, complete description to the technical solution of the utility model, and based on the embodiment in the application, this field is general
Logical technical staff other similar embodiments obtained without making creative work, all should belong to the application
The range of protection.In addition, the direction word mentioned in following embodiment, such as "upper" "lower" " left side " " right side " etc. are only with reference to attached drawing
Direction, therefore, the direction word used be for illustrative and not limiting the utility model create.
Embodiment one:
With reference to Fig. 4, a kind of annular beam converting means, including condenser lens 1, tubular reflector 2 and collimation lens 6.Its
In, condenser lens 1 is located in the transmission optical path of annular beam 4, plays focussing force to annular beam 4.Tubular reflector 2 along
The transmission optical path of annular beam 4 is arranged, and one end of annular beam 4 from tubular reflector 2 after focusing is incident to tubular reflector 2
Inner wall, annular beam 4 after inner wall reflects exports from the other end of tubular reflector 2, meanwhile, the tubular reflector 2
Central axis, the optical axis of condenser lens 1 and the transmission optical path of annular beam 4 be overlapped, and tubular reflector 2 and condenser lens
1 minimum spacing is greater than the focal length of condenser lens 1, that is to say, that after 4 line focus lens 1 of annular beam focus and dissipates.Collimation
Lens 6 are located in the transmission optical path of annular beam 4, for being collimated to the annular beam 4 exported through tubular reflector 2, and
The light passing radius of collimation lens 6 is greater than the outer diameter of the annular beam 4 exported through tubular reflector 2.
With reference to Fig. 4, the outer diameter of the annular beam 4 (annular beam before converting) is R1, internal diameter R2, collimated
The outer diameter for the annular beam (i.e. transformed annular beam) that lens 6 export after collimating is R1', internal diameter R2', condenser lens
1 focal length is f, and the internal diameter of tubular reflector 2 is R, and the distance of focus to the collimation lens 6 of condenser lens 1 is L, then
With reference to Fig. 3, the collimation lens 6 is by the subregion (i.e. arrow straight line P) on ordinary lens 3 around annular beam
Transmission optical path be rotated by 360 ° to be formed, the subregion be collimation lens 6 light passing radius.The biography of dotted line A expression annular beam 4
Road is lost, dotted line B indicates the optical axis of ordinary lens 3, the transmission of optical axis (i.e. the dotted line B) and annular beam 4 of the ordinary lens 3
In parallel, the tubular reflector 2 is divided into several reflector sub-blocks along its circumferential direction to optical path (i.e. dotted line A), the optical axis with ordinary lens 3
The extending line intersection point of the annular beam after the reflection of reflector sub-block in same vertical plane is located at the optical axis of ordinary lens 3
On.
Specifically, using the specific conversion process of the annular beam converting means are as follows:
Firstly, annular beam 4 is used as incident beam, incident beam, which is focused and dissipated by condenser lens 1, is transmitted to tubulose
Reflector 2.
Then, incident beam reflects on the inner wall of tubular reflector 2 and exports to form outgoing beam, and outgoing beam is through standard
Straight lens 6, which are collimated into directional light and export, forms output beam, and the output beam is transformed annular beam 5.
In above-mentioned conversion process, by adjusting f, R and L, output beam (i.e. transformed annular beam 5) internal diameter is realized
With any adjusting of outer diameter.
Embodiment two:
The part that the present embodiment is the same as example 1 repeats no more, unlike:
In the present embodiment by converting means in conjunction with distorting lens, to realize wavefront correction.
The internal diameter of annular beam before transformation is 20mm, and outer diameter 25mm, annulus width is 5mm, wavefront distribution such as Fig. 5
(a) shown in, PV value is 2.7 μm.Since the annulus width of the annular beam before transformation is smaller, common distorting lens cannot achieve wave
Therefore preceding correction is broadened annulus by converting means.Design parameterR=70mm, transformed annular beam it is interior
Diameter is 20mm, and outer diameter 60mm, annulus width is 40mm, and as shown in Fig. 5 (b), PV value is 2.7 μm for wavefront distribution.Using normal
The distorting lens of rule carries out wavefront correction to light beam, and for the wavefront distribution after correction as shown in Fig. 5 (c), residual error PV value is 0.35 μm.
That is, increasing the annulus area of annular beam by the adjusting of converting means, guarantee distorting lens and light beam
There are enough drivers in the region of effect, improves the effect of wavefront correction.
Embodiment three:
The part that the present embodiment is the same as example 1 repeats no more, unlike:
In the present embodiment by converting means in conjunction with measuring device, to realize light velocity measurement.
The internal diameter of annular beam before transformation is 20mm, and outer diameter 25mm, annulus width is 5mm.According to traditional side
Method carries out shrink beam, annulus width also can scaled down, be such as 5mm, internal diameter 4mm by reduced diameter, annulus width will become
1mm, relatively narrow annulus width will lead to wavefront measurement precision deficiency, shown in measurement result such as Fig. 6 (a).Therefore, it is filled by transformation
Set carry out optical beam transformation, design parameterThe internal diameter of R=7.5mm, transformed annular beam are 1mm, and outer diameter is
5mm, annulus width are 4mm, are measured using common Wavefront sensor, since annulus width is enough, can be obtained higher
Measurement accuracy, shown in measurement result such as Fig. 6 (b).
That is, guaranteeing that light beam enters in detecting devices according to design requirement by the adjusting of converting means, improving and survey
Accuracy of measurement, the detecting devices can be near field CCD, be also possible to Wavefront sensor.
The utility model is described in detail above, it is described above, only the preferred embodiment of the utility model and
, when the utility model practical range cannot be limited, i.e., all according to the made equivalent changes and modifications of the application range, it should still belong to this
In utility model covering scope.
Claims (5)
1. a kind of annular beam converting means characterized by comprising
Condenser lens is located in the transmission optical path of annular beam, for being focused to annular beam；
Tubular reflector is arranged along the transmission optical path of annular beam, and annular beam after focusing is from the one of tubular reflector
End is incident to the inner wall of tubular reflector, and the annular beam after inner wall reflects 1 time is exported from the other end of tubular reflector, institute
The transmission optical path for stating the central axis of tubular reflector, the optical axis of condenser lens and annular beam is overlapped, and tubular reflector
It is greater than the focal length of condenser lens with the minimum spacing of condenser lens；
And collimation lens, be located at annular beam transmission optical path on, for the annular beam exported through tubular reflector into
Row collimation.
2. a kind of annular beam converting means according to claim 1, which is characterized in that the optical axis of the collimation lens with
The transmission optical path of annular beam is overlapped, and the light passing radius of collimation lens is greater than the outer of the annular beam exported through tubular reflector
Diameter.
3. a kind of annular beam converting means according to claim 2, which is characterized in that the collimation lens is general by being located at
Subregion on penetrating mirror is rotated by 360 ° to be formed around the transmission optical path of annular beam, and the subregion is the light passing half of collimation lens
Diameter.
4. a kind of annular beam converting means according to claim 3, which is characterized in that the optical axis of the ordinary lens with
The transmission optical path of annular beam is parallel, and the tubular reflector is divided into several reflector sub-blocks along its circumferential direction, with ordinary lens
The extending line intersection point of annular beam after the reflector sub-block reflection that optical axis is in same vertical plane is located at the light of ordinary lens
On axis.
5. a kind of annular beam converting means according to claim 3 or 4, which is characterized in that outside the annular beam
Diameter is R1, internal diameter R2, and the outer diameter of the annular beam exported after collimated collimated is R1', internal diameter R2', focusing
The focal length of lens is f, and the internal diameter of tubular reflector is R, and the distance of focus to the collimation lens of condenser lens is L, then
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821585097.7U CN208737107U (en) | 2018-09-27 | 2018-09-27 | A kind of annular beam converting means |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821585097.7U CN208737107U (en) | 2018-09-27 | 2018-09-27 | A kind of annular beam converting means |
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| CN208737107U true CN208737107U (en) | 2019-04-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303244A (en) * | 2019-07-25 | 2019-10-08 | 中国工程物理研究院激光聚变研究中心 | It is a kind of quickly to prepare surface period structural approach |
-
2018
- 2018-09-27 CN CN201821585097.7U patent/CN208737107U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110303244A (en) * | 2019-07-25 | 2019-10-08 | 中国工程物理研究院激光聚变研究中心 | It is a kind of quickly to prepare surface period structural approach |
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