CN204314545U - A kind of parallel beam expand device improving laser self-adoptive compensation resolution - Google Patents
A kind of parallel beam expand device improving laser self-adoptive compensation resolution Download PDFInfo
- Publication number
- CN204314545U CN204314545U CN201420871834.5U CN201420871834U CN204314545U CN 204314545 U CN204314545 U CN 204314545U CN 201420871834 U CN201420871834 U CN 201420871834U CN 204314545 U CN204314545 U CN 204314545U
- Authority
- CN
- China
- Prior art keywords
- convex lens
- lens
- laser
- distorting
- adoptive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Lenses (AREA)
Abstract
The utility model discloses a kind of parallel beam expand device improving laser self-adoptive compensation resolution, belong to laser amplifier field, comprise convex lens one, convex lens two and distorting lens, described convex lens one, convex lens two, the direction that distorting lens advances along laser is arranged in order, the focal distance f 1 of described convex lens one is less than the focal distance f 2 of convex lens two, primary optical axis and the focus of described convex lens one and convex lens two all overlap, laser spot size can be expanded before inciding distorting lens f2/f1 doubly by this device, make use of the wavefront distortion of more distorting lens unit compensation, improve and compensate resolution, also reduce difficulty of processing and the cost of distorting lens simultaneously.
Description
Technical field
The utility model relates to laser amplifier field, improves in particular to a kind of the parallel beam expand device that laser self-adoptive compensates resolution.
Background technology
Laser, since being invented, has been used widely in science and industrial every field.It is exactly that brightness is high that laser is different from the maximum feature of ordinary light source.But the factors such as the uneven distribution of the disturbance of environment and the mismachining tolerance of laser medium and pump light all can cause laser wave front-distortion.Wavefront distortion can make the brightness of laser instrument reduce, and affects the effect of laser instrument.In order to improve brightness, scientific and technical personnel have invented the method for optics adaptive equalization, by the wavefront distortion adopting self-adaptation distorting lens to compensate laser.But the distorting lens cellar area of self-adapting compensation method is comparatively large, the unit size of common variation mirror is at more than 5mm, and for small-bore laser facula, the resolution of compensation is very limited.Although also reduce the method for distorting lens unit size in the world at present in research and development, current technology maturity is lower, and cost is high.
Utility model content
For above-mentioned problems of the prior art, the utility model provides a kind of and improves the parallel beam expand device that laser self-adoptive compensates resolution, the small-bore laser of this device process is adopted to be expanded before distorting lens, hot spot can be extended to whole distorting lens, substantially increase the adaptive equalization resolution of distorting lens, reduce difficulty of processing and the cost of distorting lens.
For achieving the above object, the utility model provides following technical scheme:
A kind of parallel beam expand device improving laser self-adoptive compensation resolution, comprise convex lens one, convex lens two and distorting lens, the direction that described convex lens one, convex lens two, distorting lens advance along laser is arranged in order, the focal distance f 1 of described convex lens one is less than the focal distance f 2 of convex lens two, and primary optical axis and the focus of described convex lens one and convex lens two all overlap.
Further, on the primary optical axis being centrally located at convex lens two of described distorting lens.
Further, the diameter of described convex lens two is greater than the diagonal line length of distorting lens.
Further, described convex lens one and convex lens two surface are all coated with the film to incident laser high permeability.
The beneficial effects of the utility model are as follows:
1, laser facula effectively can be amplified f2/f1 doubly by 2 convex lens, by the convex lens of different focal with the use of, the enlargement factor of laser can be changed;
2, expanding multiplying power is not definite value, can change according to the size of laser facula and self-adaptation distorting lens;
3, project again on distorting lens after laser beam expanding, make use of the wavefront distortion of more distorting lens unit compensation, improve and compensate resolution, reduce difficulty of processing and the cost of distorting lens.
Accompanying drawing explanation
Fig. 1 is one-piece construction schematic diagram of the present utility model;
Fig. 2 is the utility model laser facula and distorting lens graph of a relation;
Fig. 3 is for expanding front laser facula and distorting lens graph of a relation.
Embodiment
The technical solution of the utility model is understood better in order to make those skilled in the art; below in conjunction with accompanying drawing of the present utility model; clear, complete description is carried out to the technical solution of the utility model; based on the embodiment in the application; other roughly the same embodiment that those of ordinary skill in the art obtain under the prerequisite not making creative work, all should belong to the scope of the application's protection.
Embodiment one:
As shown in Figure 1, a kind of parallel beam expand device improving laser self-adoptive compensation resolution, comprise convex lens 1, convex lens 22 and distorting lens 3, the direction that described convex lens 1, convex lens 22, distorting lens 3 advance along laser is arranged in order, the focal distance f 1 of described convex lens 1 is less than the focal distance f 2 of convex lens 22, and primary optical axis 5 and the focus 4 of described convex lens 1 and convex lens 22 all overlap.On the primary optical axis 5 being centrally located at convex lens 1 and convex lens 22 of described distorting lens 3.The diameter of described convex lens 22 is greater than the diagonal line length of distorting lens 3, distorting lens 3 is connected to or in the projection inside of convex lens 22, can guarantees that incident laser is fully expanded and all projects on distorting lens 3 like this in projection that is vertical and paper direction should be.Described convex lens 1 and convex lens 22 surface are all coated with the film to incident laser high permeability.
During specific works, incident laser is incident by the side of convex lens 1 with directional light, laser spot center is positioned on the primary optical axis 5 of convex lens 1, 1: 4 is converted at the opposite side focus place of convex lens 1, this point is also the focus of convex lens 22, the laser divergent transport after overfocus 4 assembled, and it is incident by the side of convex lens 22, the diameter of convex lens 22 is greater than the diagonal line length of laser facula, at convex lens 22 opposite side with parallel light emergence, obtain hot spot and expand f2/f1 laser doubly, laser reenters and is mapped on distorting lens 3, outgoing after the rectification of distorting lens 3, the length of side of laser facula is less than or equal to the length of side of distorting lens, optimum for equaling, f1 and f2 can be changed change and expand multiplying power, make to expand the rear hot spot length of side and equal the distorting lens length of side, distorting lens can be utilized to greatest extent, utilize the wavefront distortion of more distorting lens unit compensation, improve and compensate resolution, also reduce difficulty of processing and the cost of distorting lens simultaneously.
Embodiment two:
As shown in Figure 2, choose incoming laser beam and be of a size of 1.6cm × 1.6cm, distorting lens 3 is of a size of 8cm × 8cm, the focal length of convex lens 1 is 3cm, the focal length of convex lens 22 is 15cm, expanding multiple is 5 times, the diameter of convex lens 22 is 14cm, above-mentioned convex lens and distorting lens are assembled into parallel beam expand device of the present utility model according to embodiment one expand, the colourless sub-box of black surround in figure represents the unit of distorting lens, gray translucent square frame is laser facula, the compensation resolution of self-adaptation distorting lens rises to 8 × 8, it is 0.2 λ/cm (λ is optical maser wavelength) that test obtains wavefront distortion gradient.
Embodiment three:
Choose incoming laser beam and be of a size of 1.6cm × 1.6cm, distorting lens 3 is of a size of 13cm × 13cm, the focal length of convex lens 1 is 2cm, the focal length of convex lens 22 is 16cm, expanding multiple is 8 times, and the diameter of convex lens 22 is 20cm, above-mentioned convex lens and distorting lens is assembled into parallel beam expand device of the present utility model according to embodiment one and expands, the compensation resolution of self-adaptation distorting lens rises to 13 × 13, and it is 0.125 λ/cm (λ is optical maser wavelength) that test obtains wavefront distortion gradient.
Embodiment four:
Choose incoming laser beam and be of a size of 1.6cm × 1.6cm, distorting lens 3 is of a size of 16cm × 16cm, the focal length of convex lens 1 is 2cm, the focal length of convex lens 22 is 20cm, expanding multiple is 10 times, and the diameter of convex lens 22 is 25cm, above-mentioned convex lens and distorting lens is assembled into parallel beam expand device of the present utility model according to embodiment one and expands, the compensation resolution of self-adaptation distorting lens rises to 16 × 16, and it is 0.1 λ/cm (λ is optical maser wavelength) that test obtains wavefront distortion gradient.
Contrast experiment one:
The laser beam selecting incident laser to be of a size of 1.6cm × 1.6cm is directly incident on distorting lens 3, as shown in Figure 3, now laser facula can only cover 2 × 2 grid, compensating resolution is 2 × 2, test wavefront distortion gradient, obtaining wavefront distortion gradient is 1 λ/cm (λ is optical maser wavelength).
Now in order to embodiment and contrast and experiment are contrasted, the results are shown in as in following table 1 to the utility model embodiment two, three, four and contrast experiment:
The Comparative result of table 1 contrast experiment and embodiment two, three, four
Contrast experiment | Embodiment two | Embodiment three | Embodiment four | |
Expand front laser size/cm | 1.6×1.6 | 1.6×1.6 | 1.6×1.6 | 1.6×1.6 |
Expand multiple | 1 | 5 | 8 | 10 |
Expand rear laser size/cm | 1.6×1.6 | 8×8 | 12.8×12.8 | 16×16 |
Distorting lens size/cm | 8×8 | 8×8 | 13×13 | 16×16 |
Compensate resolution | 2×2 | 8×8 | 13×13 | 16×16 |
Wavefront distortion gradient/λ/cm | 1 | 0.2 | 0.125 | 0.1 |
Above-mentioned experimental data is provided by laser fusion research centre, China Physics Institute new ideas Laser Technology Laboratory.
By table 1, contrast experiment one is contrasted with embodiment two, three, four, can according to the size selective excitation enlargement factor of distorting lens, laser is after expanding, and the compensation resolution of self-adaptation distorting lens significantly improves, and wavefront distortion gradient reduces greatly; Embodiment two, three, four is contrasted, can find that the utility model can choose the focal distance ratio f2/f1 of convex lens according to the size of distorting lens, be skillfully constructed, adjustable flexibly.
In addition, be to be understood that, although this instructions is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of instructions is only for clarity sake, those skilled in the art should by instructions integrally, and the technical scheme in each embodiment also through appropriately combined, can form other embodiments that it will be appreciated by those skilled in the art that.
Claims (4)
1. one kind is improved the parallel beam expand device that laser self-adoptive compensates resolution, comprise convex lens one, convex lens two and distorting lens, it is characterized in that, the direction that described convex lens one, convex lens two, distorting lens advance along laser is arranged in order, the focal distance f 1 of described convex lens one is less than the focal distance f 2 of convex lens two, and primary optical axis and the focus of described convex lens one and convex lens two all overlap.
2. a kind of parallel beam expand device improving laser self-adoptive compensation resolution according to claim 1, is characterized in that, on the primary optical axis being centrally located at convex lens two of described distorting lens.
3. a kind of parallel beam expand device improving laser self-adoptive compensation resolution according to claim 1, it is characterized in that, the diameter of described convex lens two is greater than the diagonal line length of distorting lens.
4. a kind of parallel beam expand device improving laser self-adoptive compensation resolution according to claim 1, it is characterized in that, described convex lens one and convex lens two surface are all coated with the film to incident laser high permeability.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201420871834.5U CN204314545U (en) | 2014-12-31 | 2014-12-31 | A kind of parallel beam expand device improving laser self-adoptive compensation resolution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201420871834.5U CN204314545U (en) | 2014-12-31 | 2014-12-31 | A kind of parallel beam expand device improving laser self-adoptive compensation resolution |
Publications (1)
Publication Number | Publication Date |
---|---|
CN204314545U true CN204314545U (en) | 2015-05-06 |
Family
ID=53136850
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201420871834.5U Expired - Fee Related CN204314545U (en) | 2014-12-31 | 2014-12-31 | A kind of parallel beam expand device improving laser self-adoptive compensation resolution |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN204314545U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104678550A (en) * | 2014-12-31 | 2015-06-03 | 中国工程物理研究院激光聚变研究中心 | Beam expanding device for improving laser adaptive compensation resolution and beam expanding method |
-
2014
- 2014-12-31 CN CN201420871834.5U patent/CN204314545U/en not_active Expired - Fee Related
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104678550A (en) * | 2014-12-31 | 2015-06-03 | 中国工程物理研究院激光聚变研究中心 | Beam expanding device for improving laser adaptive compensation resolution and beam expanding method |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
Li et al. | BP artificial neural network based wave front correction for sensor-less free space optics communication | |
CN111007587B (en) | Full-medium broadband polarization and phase control super-surface and far-field super-resolution focusing device | |
CN106168713B (en) | Double-aspheric lens shaping lens for converting Gaussian beam into flat-topped beam | |
CN106526839B (en) | Synchronous wavefront-free self-adaptive optical system based on mode | |
Li et al. | Combinational-deformable-mirror adaptive optics system for atmospheric compensation in free space communication | |
CN204314545U (en) | A kind of parallel beam expand device improving laser self-adoptive compensation resolution | |
CN104020566A (en) | Two-dimensional large-scale laser beam array duty ratio adjusting device | |
CN206392520U (en) | A kind of laser cleaner of antisitic defect | |
CN204116721U (en) | A kind of optical system producing banded Beams | |
CN104678550A (en) | Beam expanding device for improving laser adaptive compensation resolution and beam expanding method | |
CN204065561U (en) | The dodging device of coupling fiber formula semiconductor laser | |
CN203894477U (en) | Hollow beam conversion apparatus based on multimode optical fiber | |
CN210803879U (en) | Flaky Bessel light beam generating device | |
Xue et al. | Actively compensation of low order aberrations by refractive shaping system for high power slab lasers | |
CN109633891B (en) | Wavefront control method | |
Li et al. | Beam shaping by using small-aperture SLM and DM in a high power laser | |
CN103885186A (en) | Astigmatism eliminating light beam shaping system based on prism pair and cylindrical mirror | |
CN202133821U (en) | Laser beam uniform irradiation optical system | |
CN112882224B (en) | Wavefront control method | |
CN104375264A (en) | Double-telecentric imaging system of dot matrix laser | |
CN204705761U (en) | A kind of flexible foldable line focus dodging device | |
CN105372816A (en) | Light uniforming method of optical fiber coupling type semiconductor laser | |
CN207502839U (en) | A kind of light path that small area light radiation field is converted into large area monochromatic radiation field | |
CN205720852U (en) | A kind of reflective combination minute surface array line focusing system | |
CN110082924B (en) | Circular polarized light generating device of vector light beam based on radial polarization change |
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: 20150506 Termination date: 20151231 |
|
EXPY | Termination of patent right or utility model |