CN2824067Y - Laser beam converting lens - Google Patents
Laser beam converting lens Download PDFInfo
- Publication number
- CN2824067Y CN2824067Y CN 200520100832 CN200520100832U CN2824067Y CN 2824067 Y CN2824067 Y CN 2824067Y CN 200520100832 CN200520100832 CN 200520100832 CN 200520100832 U CN200520100832 U CN 200520100832U CN 2824067 Y CN2824067 Y CN 2824067Y
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- function
- laser beam
- curved surface
- lens
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Abstract
The utility model relates to a laser beam conversion lens, which is made of an optical lens material. The lens comprises at least one section of column-shaped curved surface, wherein the column-shaped curved surface comprises an incidence curved surface and an emergent surface, and the contour of the cross section in the height direction is a noncircular curve. An incidence laser beam is in parallel with a y shaft, the contour line of the cross section of an incidence part comprises a section of curve formed by a function y=f (x) in an interval [-x< n >, x< n >], the function y=f (x) in the interval [-x< n >, x< n >] satisfies the requirements as follows: (0.02m< 2 >+1.02) < 0.5 >[1.01 (m< 2 >+1) < 0.5 >x< n >-(1.02 (m< 2 >+1) x< n >< 2 >-m< 2 >x< 2 >) < 0.5 >/m<=f (x) <=2.4m [2.6x< n >-(2.6x< n >< 2 >-x< 2 >) < 0.5 >]; the first derivative f'(x) of the function y=f (x) in the interval [-x< n >, x< n >] to x is a function of monotone increase, and the function y=f'(x) is a smooth and continuous curve in the interval [-x< n >, x< n >].
Description
Technical field:
The utility model relates to a kind of lens of laser beam conversion usefulness.
Background technology:
The laser projection device that can form the visible laser datum line at present on the construction surface has begun to have obtained utilization widely in building and decoration field.As shown in Figure 1: the columned lens 1 of general employing are converted to the flat laser that is the fan shooting propagation with the collimated laser beam 2 of line focus by refraction in the existing laser projection device, when this laser projections can form a visible continuous laser line to target surface.
The cross section profile of existing cylindrical lens 1 is the full circle of a standard, because the geometric properties of being justified and the restriction of the index of refraction in lens, the laser intensity of the fan-shaped flat laser beam that its refraction produces distributes very inhomogeneous.Concentrate owing to laser distributes at middle part in fan-shaped flat laser beam, so the laser intensity height, and the laser rays that forms on target surface is bright.And the distribution of the laser of fan-shaped both sides is rare, so laser intensity is low, and the laser rays that forms on target surface is dark.
In practice, because the laser intensity of fan-shaped both sides is weak fast, therefore under the influence of the laser rays that forms on the target surface, with the naked eye be difficult to identification at surround lighting, this part laser rays there is no practical meaning.In other words, since the above-mentioned characteristic limitations of cylindrical lens the effectively visible dispersion angle of fan-shaped laser rays.According to actual measurement, when laser power during less than 5mw, by refractive index is that the effective segment angle of the formed reality of cylindrical lens that 1.7 optical glass material constitutes is about 130 degree, and be that the actual effectively segment angle that cylindrical lens that 1.5 optical resin material constitutes can form has only about 90 degree by refractive index, so just limited the length that is incident upon formed laser rays on the target surface greatly.And often need large-scale work standard line in building and the decoration construction operation, so use the needs that the laser aid of existing cylindrical lens can not satisfy construction operation fully.
Because existing cylindrical lens is owing to exist above-mentioned defective, thus be necessary its structure is improved, longer to improve the segment angle of fan-shaped flat laser beam, to make the laser rays that is incident upon on the target surface.
Summary of the invention;
The purpose of this utility model is: provide a kind of and can enlarge the fan-shaped dispersion angle of described fan-shaped flat laser beam and can make the laser rays Luminance Distribution be similar to uniform convertible lens.The utility model is achieved through the following technical solutions:
A kind of laser beam convertible lens, make by optical lens material, lens comprise one section column-shape curved surface at least, this column-shape curved surface can be converted to the incoming laser beam of horizontal infection and be the flat shoot laser that fan shooting is propagated by refraction, this column-shape curved surface comprises incident curved surface and exit facet, and its cross section profile on short transverse is a non-circular curve;
Described incoming laser beam is parallel to the y axle, comprise in the cross section contour of the curved surface of its incident portion one section by function y=f (x) at interval [x
n, x
n] the interior curve that constitutes, and described function y=f (x) is at interval [x
n, x
n] in satisfy condition:
①(0.02m
2+1.02)
0.5[1.01(m
2+1)
0.5x
n-(1.02(m
2+1)x
n 2-m
2x
2)
0.5]/m≤f(x)≤2.4m[2.6x
n-(2.6x
n 2-x
2)
0.5]；
Wherein, i is the refractive index of lens material, m=tg α
n, x
n∈ [1,10], α
n∈ [45 °, 90 °].
2. function y=f (x) is at interval [x
n, x
n] in, its first order derivative f ' to x is a monotonically increasing function (x), and function y=f ' is (x) at interval [x
n, x
n] in be a smooth and continuous curve.
The incident curvature portion that is made of described curve can be converted to fan-shaped flat laser beam by refraction with the laser beam of horizontal infection, and since y=f (x) at interval [x
n, x
n] in to the first order derivative f ' of x (x) dull, continuously, change mild, so the incident angle α of incident laser is at interval [x
n, x
n] in also dull, continuously, change mild, so the incident curved surface of the cylindrical lens laser intensity that can effectively improve fan-shaped laser beam distributes relatively.Because weak the slowing down of laser intensity of fan-shaped laser beam both sides, therefore can effectively improve the visible dispersion angle of fan-shaped laser rays, thereby increased the length that is incident upon formed laser rays on the target surface, laser projection device can have been adapted in building and the decoration operation make the needs of datum line on a large scale.
In the utility model, described function y=f (x) is a function: y=Ln[(i-1)/(icos kx-1)]/k.K=π * [α n-arcsin (sin α n/i)]/(180*x wherein
n)
The incident curvature portion that is made of described curve can be converted to fan-shaped laser beam by refraction with the laser beam of horizontal infection, and since y=f (x) at interval [x
n, x
n] in to the first order derivative f ' of x (x) dull, continuously, change mild, and (value of sin α/i) is a non-vanishing arithmetic progression to satisfy α-arcsin, so fan-shaped laser beam is evenly distributed at the laser intensity of each position, the angle that is the refracted ray that produces of equally spaced incoming laser beam is identical, therefore can significantly improve the visible dispersion angle of fan-shaped laser rays, make laser projection device can adapt to the needs of making wider datum line in building and the decoration operation.
In the utility model, the cross section contour of the exit facet of described lens is center of circle circular arcs on the y axle, and the center of circle is positioned at exit facet one side.The exit facet part that is made of this circular arc can further enlarge the segment angle of above-mentioned fan-shaped laser beam, and the exit facet of cylindrical lens can improve intensity of laser beam and distributes relatively.
Description of drawings:
Fig. 1 is the refractive light paths figure of cylindrical lens
Fig. 2 is the sectional view of the utility model one embodiment
Fig. 3 is the refractive light paths figure of the utility model embodiment
Embodiment:
Embodiment below in conjunction with shown in the accompanying drawing 2,3 is further described.Get refractive index i=1.49, the x of lens 3 in the present embodiment
n=2, α
n=82.8 °.As shown in Figure 2, the cross section contour of the incident curved surface 4 of present embodiment is by function y=Ln[0.49/ (1.49cos 0.35825x-1)]/0.35825 curve that in interval [2.1,2.1], constitutes.
The exit facet 5 of present embodiment is that the cross section contour of the exit facet of described lens is circular arcs of center of circle radius R=34 on the y axle, and the center of circle is positioned at exit facet one side.When the parallel y axle of incident laser, the new refractive light paths figure of this practicality as shown in Figure 3.If the angle of the refractive light paths of incident laser and y axle is θ, the angle of shoot laser and y axle is δ, and then the correlation computations data are as shown in the table:
| x | θ | Δθ | δ | Δδ |
| 0 | 0 | 0 | 0 | 0 |
| 0.1 | 2.053 | 2.053 | 3.186 | 3.186 |
| 0.2 | 4.105 | 2.053 | 6.377 | 3.191 |
| 0.3 | 6.158 | 2.053 | 9.582 | 3.205 |
| 0.4 | 8.211 | 2.053 | 12.806 | 3.224 |
| 0.5 | 10.263 | 2.052 | 16.054 | 3.248 |
| 0.6 | 12.316 | 2.053 | 19.338 | 3.284 |
| 0.7 | 14.368 | 2.052 | 22.663 | 3.325 |
| 0.8 | 16.421 | 2.053 | 26.041 | 3.378 |
| 0.9 | 18.474 | 2.053 | 29.482 | 3.441 |
| 1.0 | 20.526 | 2.053 | 32.997 | 3.515 |
| 1.1 | 22.579 | 2.053 | 36.605 | 3.608 |
| 1.2 | 24.632 | 2.053 | 40.321 | 3.716 |
| 1.3 | 26.684 | 2.052 | 44.165 | 3.844 |
| 1.4 | 28.737 | 2.053 | 48.164 | 3.999 |
| 1.5 | 30.789 | 2.052 | 52.342 | 4.178 |
| 1.6 | 32.842 | 2.053 | 56.733 | 4.391 |
| 1.7 | 34.895 | 2.053 | 61.355 | 4.622 |
| 1.8 | 36.947 | 2.052 | 66.187 | 4.832 |
| 1.9 | 39 | 2.053 | 71.082 | 4.895 |
| 2.0 | 41.053 | 2.053 | 75.429 | 4.347 |
As can be known from the above table, the angle Δ θ of the laser beam of the horizontal infection refracted ray that its equidistant incoming laser beam produces after the refraction first time of described lens is identical.This refraction laser is after the refraction once more of lens exit facet, and its segment angle further enlarges, and laser intensity begins slowly to weaken gradually from fan-shaped middle part, and it is comparatively even to distribute.
Claims (3)
1, a kind of laser beam convertible lens, make by optical lens material, lens comprise one section column-shape curved surface at least, and this column-shape curved surface can be converted to the incoming laser beam of horizontal infection and be the flat shoot laser that fan shooting is propagated by refraction, and column-shape curved surface comprises incident curved surface and exit facet; It is characterized in that: the cross section profile of described column-shape curved surface on short transverse is non-circular curve;
Described incoming laser beam is parallel to the y axle, comprise in the cross section contour of the curved surface of its incident portion one section by function y=f (x) at interval [x
n, x
n] the interior curve that constitutes, and described function y=f (x) is at interval [x
n, x
n] in satisfy condition:
①(0.02m
2+1.02)
0.5[1.01(m
2+1)
0.5x
n-(1.02(m
2+1)x
n 2-m
2x
2)
0.5]/m≤f(x)≤2.4m[2.6x
n-(2.6x
n 2-x
2)
0.5]；
Wherein, i represents the refractive index of lens, m=tg α
n, x
n∈ [1,10], α
n∈ [45 °, 90 °],
2. function y=f (x) is at interval [x
n, x
n] interior its first order derivative f ' to x is a monotonically increasing function (x), and function y=f ' is (x) at interval [x
n, x
n] in be a smooth and continuous curve.
2. a kind of laser beam convertible lens according to claim 1; It is characterized in that: described function y=f (x) is a function: y=Ln[(i-1)/(icoskx-1)]/k
K=π * [α n-arcsin (sin α n/i)]/(180*xn) wherein
3. a kind of laser beam convertible lens according to claim 1; It is characterized in that: the cross section contour of the exit facet of described lens is center of circle circular arcs on the y axle, and the center of circle is positioned at exit facet one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520100832 CN2824067Y (en) | 2005-03-05 | 2005-03-05 | Laser beam converting lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520100832 CN2824067Y (en) | 2005-03-05 | 2005-03-05 | Laser beam converting lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2824067Y true CN2824067Y (en) | 2006-10-04 |
Family
ID=37033182
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520100832 Expired - Fee Related CN2824067Y (en) | 2005-03-05 | 2005-03-05 | Laser beam converting lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2824067Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230310A (en) * | 2020-10-23 | 2021-01-15 | 青岛镭创光电技术有限公司 | Optical element and laser |
-
2005
- 2005-03-05 CN CN 200520100832 patent/CN2824067Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112230310A (en) * | 2020-10-23 | 2021-01-15 | 青岛镭创光电技术有限公司 | Optical element and laser |
| CN112230310B (en) * | 2020-10-23 | 2022-07-19 | 青岛镭创光电技术有限公司 | Optical element and laser |
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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: 20061004 |