CN201589894U - Device for generating approximate non-diffracting beams - Google Patents
Device for generating approximate non-diffracting beams Download PDFInfo
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- CN201589894U CN201589894U CN 200920295714 CN200920295714U CN201589894U CN 201589894 U CN201589894 U CN 201589894U CN 200920295714 CN200920295714 CN 200920295714 CN 200920295714 U CN200920295714 U CN 200920295714U CN 201589894 U CN201589894 U CN 201589894U
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Abstract
The utility model discloses a device for generating approximate non-diffracting beams, which comprises a laser, a short focal length lens, a long focal length lens, a diaphragm and a lens axis pyramid that are sequentially arranged, wherein the distance between the short focal length lens and the long focal length lens is the sum of focus lengths of the two, and the centers of the short focal length lens, the long focal length lens, the diaphragm and the lens axis pyramid are all arranged on an optical axis. The device has low manufacturing cost and simple structure and can obtain the approximate non-diffracting beams conveniently, fast and clearly.
Description
Technical field
The utility model relates to a kind of device that produces approximate diffraction light-free bundle, is specially adapted to gauss laser beam is transformed to approximate diffraction light-free bundle.
Background technology
The diffraction light-free bundle is a focus of Recent study, and it is little that it has center spot, keeps light distribution constant in the transmission, light intensity high concentration, characteristic such as reconstruction certainly.It is attended by the most momentous results to fields such as, light tweezer, atom guiding high-precision fixed.Desirable diffraction light-free bundle is non-existent, can only obtain approximate diffraction light-free bundle in the reality.At present, being used for producing the optical element that is similar to the diffraction light-free bundle has a lot, such as circumferential weld-lens, and computer hologram, axle pyramid or the like.
Circumferential weld-lens method produces approximate diffraction light-free bundle, and capacity usage ratio is low, is about 15%, and the Conical Lenses method produces approximate diffraction light-free bundle, good beam quality, and capacity usage ratio height, but axle pyramid difficulty of processing is big, the cost height.
The utility model content
The purpose of this utility model provides a kind of handling ease, generation with low cost is similar to the device of diffraction light-free bundle.
The technical solution of the utility model is such: the device that produces approximate diffraction light-free bundle, comprise the laser instrument, short focal length lens, long-focus lens, diaphragm and the axis of lens pyramid that set gradually, wherein, spacing between short focal length lens and the long-focus lens is both focal length sums, and the center of short focal length lens, long-focus lens, diaphragm and axis of lens pyramid is all on optical axis.
Described diaphragm is the adjustable circular iris of a radius.
Described axis of lens pyramid is by a convergent lens and the two-lens system that the divergent lens gummed forms.
The radius-of-curvature of first sphere of described convergent lens is that the radius-of-curvature of 189 ± 1mm, second sphere is-7 ± 1mm; The radius-of-curvature of first sphere of described divergent lens is that the radius-of-curvature of-7 ± 1mm, second sphere is-27 ± 1mm; Second sphere of described convergent lens and first sphere of described divergent lens are glued together.
The glass material of described convergent lens is BK7, and center thickness is 3mm, and the glass material of described divergent lens is SF2, and center thickness is 2mm.
After adopting such scheme, open laser instrument, light modulation, collimation expands bundle, and the limit bundle makes light beam normal incidence can produce approximate diffraction light-free bundle on axis of lens pyramid.Compared with prior art, the utility model cost is low, simple in structure, can obtain approximate diffraction light-free bundle easily and quickly.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the structure enlarged diagram of axis of lens pyramid in the utility model;
Fig. 3 is the structure enlarged diagram of diaphragm in the utility model.
Embodiment
The device of the approximate diffraction light-free bundle of generation of the present utility model, as shown in Figure 1, comprise the laser instrument 1, short focal length lens 2, long-focus lens 3, diaphragm 4, axis of lens pyramid 5, optical table 6 and the support 7 that set gradually, wherein, spacing between short focal length lens 2 and the long-focus lens 3 is both focal length sums, and the center of short focal length lens 2, long-focus lens 3, diaphragm 4 and axis of lens pyramid 5 is all on optical axis.
Short focal length lens 2 is the short convergent lens of a focal length; Long-focus lens 3 is the long convergent lens of a focal length; Short focal length lens 2 and long-focus lens 3 are used to constitute down telescopic system and the laser beam of laser instrument 1 output is collimated expand bundle.
As shown in Figure 2, axis of lens pyramid 5 is the two-lens systems that formed by convex lens 51 and concavees lens 52 gummeds.The radius-of-curvature r of first sphere of convex lens 51
1The radius-of-curvature r of=189 ± 1mm, second sphere
2=-7 ± 1mm; The radius-of-curvature r of first sphere of concavees lens 52
2The radius-of-curvature r of=-7 ± 1mm, second sphere
3=-27 ± 1mm; Second sphere of convex lens 51 and first sphere of concavees lens 52 are closely glued together, and the two is spaced apart 0.The glass material of convex lens 51 is BK7, and center thickness is 3mm; The glass material of concavees lens 52 is SF2, and center thickness is 2mm.
During work, on optical table 6, place laser instrument 1, place short focal length lens 2, long-focus lens 3, diaphragm 4 and axis of lens pyramid 5 successively along laser optical path, laser instrument 1, short focal length lens 2, long-focus lens 3, diaphragm 4 and axis of lens pyramid 5 are located on the optical table 6 by 7 on support respectively; Next, open laser instrument 1, treat laser instrument 1 operate as normal, adjusting short focal length lens 2, long-focus lens 3 make the distance between them equal both focal length sums, laser alignment is expanded bundle, the interior circular diameter of adjusting diaphragm 4 makes the radius that is slightly less than axis of lens pyramid 5 by the beam diameter behind the diaphragm 4, and the center of light beam is overlapped with the center of axis of lens pyramid 5.Laser beam normal incidence behind the collimator and extender will obtain approximate diffraction light-free bundle in one the segment distance thereafter behind the axis of lens pyramid 5.
Claims (5)
1. produce the device of approximate diffraction light-free bundle, it is characterized in that: comprise the laser instrument, short focal length lens, long-focus lens, diaphragm and the axis of lens pyramid that set gradually, wherein, spacing between short focal length lens and the long-focus lens is both focal length sums, and the center of short focal length lens, long-focus lens, diaphragm and axis of lens pyramid is all on optical axis.
2. the device of the approximate diffraction light-free bundle of generation according to claim 1, it is characterized in that: described diaphragm is the adjustable circular iris of a radius.
3. the device of the approximate diffraction light-free bundle of generation according to claim 1 is characterized in that: described axis of lens pyramid is the two-lens system that the gummed by a convergent lens and a divergent lens forms.
4. the device of the approximate diffraction light-free bundle of generation according to claim 3 is characterized in that: the radius-of-curvature of first sphere of described convergent lens is that the radius-of-curvature of 189 ± 1mm, second sphere is-7 ± 1mm; The radius-of-curvature of first sphere of described divergent lens is that the radius-of-curvature of-7 ± 1mm, second sphere is-27 ± 1mm; Second sphere of described convergent lens and first sphere of described divergent lens are glued together.
5. according to the device of claim 3 or the approximate diffraction light-free bundle of 4 described generations, it is characterized in that: the glass material of described convergent lens is BK7, and center thickness is 3mm, and the glass material of described divergent lens is SF2, and center thickness is 2mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920295714 CN201589894U (en) | 2009-12-23 | 2009-12-23 | Device for generating approximate non-diffracting beams |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200920295714 CN201589894U (en) | 2009-12-23 | 2009-12-23 | Device for generating approximate non-diffracting beams |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201589894U true CN201589894U (en) | 2010-09-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200920295714 Expired - Fee Related CN201589894U (en) | 2009-12-23 | 2009-12-23 | Device for generating approximate non-diffracting beams |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201589894U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819111A (en) * | 2012-08-03 | 2012-12-12 | 华侨大学 | Optical system for generating approximate non-diffracting Bessel beam by LED (Light-Emitting Diode) |
| CN102902066A (en) * | 2012-09-26 | 2013-01-30 | 华侨大学 | Optical system for achieving Bessel light beam self reconstruction by utilizing light-emitting diode (LED) light source |
| CN103760673A (en) * | 2014-01-06 | 2014-04-30 | 华侨大学 | Optical system for generating approximate diffraction-free zero-order Mathieu beam |
| CN104199189A (en) * | 2014-09-12 | 2014-12-10 | 华侨大学 | Optical system capable of generating banding diffraction-free light beams |
| CN109623172A (en) * | 2019-01-31 | 2019-04-16 | 大族激光科技产业集团股份有限公司 | A kind of laser cutting method and device of optical filter |
-
2009
- 2009-12-23 CN CN 200920295714 patent/CN201589894U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102819111A (en) * | 2012-08-03 | 2012-12-12 | 华侨大学 | Optical system for generating approximate non-diffracting Bessel beam by LED (Light-Emitting Diode) |
| CN102902066A (en) * | 2012-09-26 | 2013-01-30 | 华侨大学 | Optical system for achieving Bessel light beam self reconstruction by utilizing light-emitting diode (LED) light source |
| CN103760673A (en) * | 2014-01-06 | 2014-04-30 | 华侨大学 | Optical system for generating approximate diffraction-free zero-order Mathieu beam |
| CN104199189A (en) * | 2014-09-12 | 2014-12-10 | 华侨大学 | Optical system capable of generating banding diffraction-free light beams |
| CN109623172A (en) * | 2019-01-31 | 2019-04-16 | 大族激光科技产业集团股份有限公司 | A kind of laser cutting method and device of optical filter |
| CN109623172B (en) * | 2019-01-31 | 2020-10-23 | 大族激光科技产业集团股份有限公司 | Laser cutting method and device for optical filter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100922 Termination date: 20111223 |