CN207650489U - Laser beam focus device - Google Patents
Laser beam focus device Download PDFInfo
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- CN207650489U CN207650489U CN201721560131.0U CN201721560131U CN207650489U CN 207650489 U CN207650489 U CN 207650489U CN 201721560131 U CN201721560131 U CN 201721560131U CN 207650489 U CN207650489 U CN 207650489U
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- lens
- laser beam
- laser
- focus device
- meniscus
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- Optical Radar Systems And Details Thereof (AREA)
- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model discloses a kind of laser beam focus devices, including：Semiconductor laser, is sequentially arranged at intervals with the first positive lens, the second positive and negative lenses in the propagation path of laser beam, and laser beam forms point shaped laser spot after the first positive lens, the second positive lens, negative lens at negative lens rear；First positive lens is crescent lens, the concave surfaces of crescent lens towards laser direction, crescent lens convex surface facing the laser beam direction of propagation, and the convex radius of crescent lens is less than the concave curvature radius of crescent lens.The laser beam focus device can realize the measurement of object in short range.
Description
Technical field
The utility model is related to laser technology field more particularly to laser beam focus devices.
Background technology
Laser technology is grown rapidly in recent years, and since laser has, good directionality, brightness is high, monochromaticjty is good and energy is close
The features such as high is spent, thus laser technology is widely used in the fields such as industrial production, communication, information processing, is especially welding, is cutting
It cuts, measure etc. in industrial productions using more extensive.
Generally use is with semiconductor laser during measuring the non-cpntact measurement of object distance, detection object pattern
Laser beam detecting sensor measures, and since the laser-beam divergence angle of semiconductor laser is big, astigmatism is serious, thus is using band
It needs first to be focused collimation to laser beam when the laser beam detecting sensor of semiconductor laser measures, common at present swashs
Beam-focuser generally use non-spherical lens is focused collimation to laser beam, but the laser beam focus device of this kind of structure without
Method forms light pencil, thus the measurement that can not be applied in short range in short range.
Utility model content
The technical issues of solving needed for the utility model be：A kind of laser beam focus device that focussed collimated effect is good is provided,
The laser beam focus device can realize the measurement of object in short range.
To solve the above problems, the technical solution adopted in the utility model is：The laser beam focus device, including：Half
Conductor laser is sequentially arranged at intervals with the first positive lens, the second positive lens in the propagation path of laser beam and bears saturating
Mirror, laser beam form point shaped laser spot after the first positive lens, the second positive lens, negative lens at negative lens rear；Described first
Positive lens is crescent lens, the concave surfaces of crescent lens towards laser direction, crescent lens convex surface facing laser beam
The direction of propagation, and the convex radius of crescent lens is less than the concave curvature radius of crescent lens.
Further, laser beam focus device above-mentioned, wherein second positive lens is biconvex lens, and described is negative
Lens are meniscus, meniscus convex surface facing laser direction, the concave surface of meniscus is towards the laser beam direction of propagation.
Further, laser beam focus device above-mentioned, wherein towards the convex surface of laser beam direction of propagation song on biconvex lens
Rate radius is less than the convex radius towards semiconductor laser direction on biconvex lens.
Further, laser beam focus device above-mentioned, wherein the convex radius of meniscus is more than meniscus
Concave curvature radius.
Further, laser beam focus device above-mentioned, wherein the center of curvature on convex surface is to semiconductor laser in meniscus
The distance of device is less than the center of curvature of concave surface in meniscus to the distance of semiconductor laser.
Further, laser beam focus device above-mentioned, wherein be arranged in the propagation path positioned at negative lens rear
There is the diffused component that a shaped laser spot can be made to diffuse into linear hot spot.
Further, laser beam focus device above-mentioned, wherein be arranged in the propagation path positioned at negative lens rear
There is the diffused component that a shaped laser spot can be made to diffuse into cross shaped laser spot.
The utility model has the beneficial effects that：By being used cooperatively for the first positive lens, the second positive lens and negative lens, have
Effect improves laser beam astigmatism problem, to realize the survey in short range on the basis of shortening laser beam focus device length
It measures, the entire length size of laser beam focus device can accomplish within 20mm, and in measurement process within the scope of 100~300mm
The point shaped laser spot that diameter is not more than 0.3mm can be formed, for the measurement essence for improving using the sensing equipment of the laser beam focus device
Degree lays a good foundation.
Description of the drawings
Fig. 1 is the structural schematic diagram of laser beam focus device described in the utility model.
Specific implementation mode
Below in conjunction with the accompanying drawings and preferred embodiment is described in further detail technical solution described in the utility model.
Embodiment 1
Technical solution described in the utility model using first focus spread afterwards by the way of make in short range to realize
The laser beam focus of semiconductor laser collimates to form a shaped laser spot.As shown in Figure 1, the laser beam described in the present embodiment is poly-
Burnt device, including：Semiconductor laser 1, interval is set successively in the propagation path for the laser beam that semiconductor laser 1 emits
It is equipped with the first positive lens 2, the second positive lens 3 and negative lens 4, laser beam is through the first positive lens 2, the second positive lens 3, negative lens 4
Afterwards point shaped laser spot is formed at the rear of negative lens 4.Wherein first positive lens 2 is crescent lens, crescent lens
Concave surface towards semiconductor laser direction, crescent lens convex surface facing the laser beam direction of propagation, and crescent lens is convex
Curvature radius is less than the concave curvature radius of crescent lens.Second positive lens 3 is biconvex lens, and described is negative
Mirror 4 is meniscus, meniscus convex surface facing semiconductor laser direction, the concave surface of meniscus is propagated towards laser beam
Direction, and be less than on biconvex lens towards laser direction towards the convex radius of the laser beam direction of propagation on biconvex lens
Convex radius, the convex radius of meniscus is more than the concave curvature radius of meniscus, meniscus convexity
The distance of the center of curvature in face to laser is less than the center of curvature of concave surface in meniscus to the distance of laser.
Embodiment 2
The present embodiment difference from example 1 is that：It is arranged in the propagation path positioned at 4 rear of negative lens
There is the diffused component that a shaped laser spot can be made to diffuse into linear hot spot, remaining structure is same as Example 1, repeats no more.Wherein will
The diffused component that point shaped laser spot diffuses into linear hot spot is known to those skilled in the art, such as cylindrical mirror diffused component is all
A shaped laser spot can be diffused into linear hot spot.Here the structure of diffused component is not specifically limited, as long as diffused component has
There is the function that a shaped laser spot is diffused into linear hot spot.
Embodiment 3
The present embodiment difference from example 1 is that：It is arranged in the propagation path positioned at 4 rear of negative lens
There is the diffused component that a shaped laser spot can be made to diffuse into cross shaped laser spot.Remaining structure is same as Example 1, repeats no more.Wherein
The diffused component that shaped laser spot is diffused into cross shaped laser spot is known to those skilled in the art.Here to diffused component
Structure is not specifically limited, as long as diffused component has the function of that will put shaped laser spot diffuses into cross shaped laser spot.
The above is only the preferred embodiment of the utility model, is not to make any other form to the utility model
Limitation, and according to any modification or equivalent variations made by the technical essence of the utility model, still fall within the requires of the utility model
The range of protection.
The utility model has the advantages that：1. by being used cooperatively for the first positive lens 2, the second positive lens 3 and negative lens 4,
It is effectively improved laser beam astigmatism problem, to realize the survey in short range on the basis of shortening laser beam focus device length
It measures, the entire length size of laser beam focus device can accomplish within 20mm, and in measurement process within the scope of 100~300mm
The point shaped laser spot that diameter is not more than 0.3mm can be formed, for the measurement essence for improving using the sensing equipment of the laser beam focus device
Degree lays a good foundation；2. diameter is put the Line of light obtained after shaped laser spot is spread by diffused component no more than 0.3mm
Spot, the light line of cross shaped laser spot are thinner, substantially increase the accuracy of detection of the sensing equipment using the laser beam focus device.
Claims (7)
1. laser beam focus device, including：Semiconductor laser, it is characterised in that：In the propagation path of laser beam successively
The first positive lens, the second positive and negative lenses are arranged at intervals with, laser beam is through the first positive lens, the second positive lens, negative lens
Afterwards point shaped laser spot is formed at negative lens rear；First positive lens is crescent lens, the concave surface direction of crescent lens
Laser direction, crescent lens convex surface facing the laser beam direction of propagation, and the convex radius of crescent lens is less than
The concave curvature radius of crescent lens.
2. laser beam focus device described in accordance with the claim 1, it is characterised in that：Second positive lens is biconvex lens,
The negative lens is meniscus, meniscus convex surface facing laser direction, the concave surface of meniscus is towards laser beam
The direction of propagation.
3. laser beam focus device according to claim 2, it is characterised in that：Towards the laser beam direction of propagation on biconvex lens
Convex radius be less than biconvex lens on towards semiconductor laser direction convex radius.
4. according to laser beam focus device according to claim 2 or 3, it is characterised in that：The convex radius of meniscus is big
In the concave curvature radius of meniscus.
5. laser beam focus device according to claim 4, it is characterised in that：The center of curvature on convex surface is to partly in meniscus
The distance of conductor laser is less than the center of curvature of concave surface in meniscus to the distance of semiconductor laser.
6. laser beam focus device according to claim 5, it is characterised in that：On the beam propagation road positioned at negative lens rear
The diffused component that a shaped laser spot can be made to diffuse into linear hot spot is provided on diameter.
7. laser beam focus device according to claim 5, it is characterised in that：On the beam propagation road positioned at negative lens rear
The diffused component that a shaped laser spot can be made to diffuse into cross shaped laser spot is provided on diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721560131.0U CN207650489U (en) | 2017-11-21 | 2017-11-21 | Laser beam focus device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721560131.0U CN207650489U (en) | 2017-11-21 | 2017-11-21 | Laser beam focus device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207650489U true CN207650489U (en) | 2018-07-24 |
Family
ID=62889145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721560131.0U Active CN207650489U (en) | 2017-11-21 | 2017-11-21 | Laser beam focus device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207650489U (en) |
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2017
- 2017-11-21 CN CN201721560131.0U patent/CN207650489U/en active Active
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