CN105423235A - Plane lens and illuminating lens device based on plane lens - Google Patents
Plane lens and illuminating lens device based on plane lens Download PDFInfo
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- CN105423235A CN105423235A CN201510734658.XA CN201510734658A CN105423235A CN 105423235 A CN105423235 A CN 105423235A CN 201510734658 A CN201510734658 A CN 201510734658A CN 105423235 A CN105423235 A CN 105423235A
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- lens
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- total reflection
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- 230000007704 transition Effects 0.000 claims abstract description 9
- 238000005286 illumination Methods 0.000 claims description 11
- 239000011521 glass Substances 0.000 claims description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 235000017060 Arachis glabrata Nutrition 0.000 description 2
- 241001553178 Arachis glabrata Species 0.000 description 2
- 235000010777 Arachis hypogaea Nutrition 0.000 description 2
- 235000018262 Arachis monticola Nutrition 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 235000020232 peanut Nutrition 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 230000011514 reflex Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention discloses a plane lens and an illuminating lens device based on the plane lens. The plane lens comprises a transparent lens body. The transparent lens body is provided with a bottom face, a total-reflection face and an emergence face. The bottom face is provided with an incidence groove used for containing a light source and faces towards the interior of the transparent lens body. The side wall of the incidence groove serves as an incidence face. According to the improvement of the technical scheme, the incidence face comprises a small-angle incidence face body and a large-angle incidence face body; a transition curved face is arranged between the total-reflection face and the emergence face; the total-reflection face comprises a first total-reflection face body and a second total-reflection face body. The illuminating lens device comprises one or more plane lens. The plane lens and the illuminating lens device based on the plane lens have the advantages, which cannot be achieved by existing products, that the surface smoothness is good, cleaning is convenient, and the light-pervious efficiency is high.
Description
Technical Field
The invention relates to an optically treated component, in particular a planar lens and an illumination lens arrangement based on the planar lens.
Background
As is well known, in lighting fixtures such as street lamps and tunnel lamps, the structure thereof includes lenses for processing light distribution. The lens of the existing lamp is generally formed with an approximate structure similar to a peanut shell on the surface due to light distribution. These structures lead to lens surface unevenness, and easy dirty dirt of hiding and holding and be difficult to the clearance in the use also leads to lens surface wearing and tearing simultaneously, influences the grading quality of lens, in addition, the defect that current lens light utilization ratio is low.
In view of the above, the present invention provides a new technical solution to solve the existing technical problems.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a planar lens and a lighting lens device based on the planar lens, which solve the technical defects of uneven surface, difficulty in cleaning, easiness in abrasion, low light energy utilization rate and the like of the conventional lens.
The technical scheme adopted by the invention for solving the technical problems is as follows:
a plane lens comprises a transparent lens body, wherein the transparent lens body is provided with a bottom surface, a total reflection surface and an exit surface, an incident groove used for accommodating a light source is arranged on the bottom surface towards the inner direction of the transparent lens body, and the side wall of the incident groove is an incident surface.
As an improvement of the technical scheme, the incidence surface comprises a small-angle incidence surface and a large-angle incidence surface.
As a further improvement of the technical scheme, a transition curved surface is arranged between the total reflection surface and the emergent surface.
As a further improvement of the above technical solution, the total reflection surface includes a first total reflection surface and a second total reflection surface.
As a further improvement of the above technical solution, the bottom surface and the exit surface are planes, the incident surface and the total reflection surface are free curved surfaces, and the transition curved surface is an arc surface.
As a further improvement of the technical scheme, a free curve formed by intersecting the incident plane and the longitudinal central section of the transparent lens body is symmetrically arranged.
As a further improvement of the technical scheme, a free curve formed by the intersection of the incident plane and the transverse central section of the transparent mirror body is asymmetrically arranged.
As a further improvement of the above technical solution, the material of the transparent mirror body is polymethyl methacrylate, polycarbonate, or glass.
An illumination lens apparatus comprising one or more of the above-described planar lenses.
The invention has the beneficial effects that: a plane lens and illumination lens device based on the plane lens, the bottom surface and the emergent surface of the plane lens are planes, the incident surface is arranged in the incident groove, the whole transparent surface is a plane, the problem that the surface of the existing lens has a structure similar to a peanut shell is avoided, the lens is not easy to be dirtied and convenient to clean, and meanwhile, the transparent surface is not easy to wear; in addition, the structure of the plane transparent transmission small-angle incidence plane, the large-angle incidence plane and the total reflection plane can effectively improve the emergence rate of the light emitted by the light source and improve the utilization efficiency of light energy. The plane lens and the illuminating lens device based on the plane lens solve the technical defects that the surface of the existing lens is uneven, difficult to clean, easy to wear, low in light energy utilization rate and the like.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a cross-sectional view of a system in which a planar lens is fitted with an LED light source in embodiment 1 of the present invention;
FIG. 2 is a two-dimensional coordinate labeled view of a longitudinal section of a planar lens in example 1 of the present invention;
FIG. 3 is a two-dimensional coordinate labeled diagram of a transverse section of a planar lens in example 1 of the present invention;
FIG. 4 is an optical line diagram showing a positive half-section profile curve AB of a longitudinal section of a planar lens in example 1 of the present invention;
FIG. 5 is an optical line diagram showing positive half-section profile curves BC and DE of a longitudinal section of a planar lens in example 1 of the present invention;
FIG. 6 is an optical line diagram showing a positive half-section profile curve EF of a longitudinal section of a planar lens in example 1 of the present invention;
FIG. 7 is a schematic view of the longitudinal cross-sectional ray direction of a planar lens in example 1 of the present invention;
FIG. 8 is a schematic view of the transverse sectional ray direction of the planar lens in example 1 of the present invention;
FIG. 9 is a cross-sectional view of a system in which a planar lens is fitted with an LED light source in embodiment 2 of the present invention;
FIG. 10 is a two-dimensional coordinate labeled view of a longitudinal section of a planar lens in example 2 of the present invention;
FIG. 11 is a two-dimensional coordinate labeled graph of a transverse cross-section of a planar lens in example 2 of the present invention;
FIG. 12 is an optical line diagram showing a positive half-section profile curve ab of a longitudinal section of a planar lens in example 2 of the present invention;
FIG. 13 is an optical line diagram showing positive half-section profile curves bc, de of the longitudinal section of a planar lens in embodiment 2 of the present invention;
FIG. 14 is a schematic view of the longitudinal cross-sectional ray direction of a planar lens in example 2 of the present invention;
fig. 15 is a schematic view of the transverse cross-sectional ray direction of the planar lens in embodiment 2 of the present invention.
Detailed Description
The conception, the specific structure, and the technical effects produced by the present invention will be clearly and completely described below in conjunction with the embodiments and the accompanying drawings to fully understand the objects, the features, and the effects of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and those skilled in the art can obtain other embodiments without inventive effort based on the embodiments of the present invention, and all embodiments are within the protection scope of the present invention. In addition, all the connection/connection relations referred to in the patent do not mean that the components are directly connected, but mean that a better connection structure can be formed by adding or reducing connection auxiliary components according to specific implementation conditions. All technical characteristics in the invention can be interactively combined on the premise of not conflicting with each other. Reference is made to fig. 1-15.
Example 1, see fig. 1-8.
A plane lens comprises a transparent lens body, wherein the transparent lens body is provided with a bottom surface, a total reflection surface and an exit surface, an incident groove used for accommodating a light source is arranged on the bottom surface towards the inner direction of the transparent lens body, and the side wall of the incident groove is an incident surface.
As an improvement of the technical scheme, the incidence surface comprises a small-angle incidence surface and a large-angle incidence surface.
As a further improvement of the technical scheme, a transition curved surface is arranged between the total reflection surface and the emergent surface.
As a further improvement of the above technical solution, the total reflection surface includes a first total reflection surface and a second total reflection surface.
As a further improvement of the above technical solution, the bottom surface and the exit surface are planes, the incident surface and the total reflection surface are free curved surfaces, and the transition curved surface is an arc surface.
When the LED light source is applied, small-angle light rays emitted by the LED light source reach an emergent surface after being refracted by a small-angle incident surface, and then are refracted out of a lens from the emergent surface; and the high-angle light emitted by the LED light source is refracted by the high-angle incidence surface, reaches the first total reflection surface, is totally reflected by the first total reflection surface, reaches the exit surface and is refracted out of the optical system from the exit surface.
In addition, the LED street lamp lens has a larger irradiation angle required by the longitudinal direction, and the LED light source is a non-ideal point light source which has a certain size, and small-angle light rays are easily totally reflected on the emergent surface after being refracted, so that the optical efficiency of the system is reduced.
As a further improvement of the technical scheme, a free curve formed by intersecting the incident plane and the longitudinal central section of the transparent lens body is symmetrically arranged.
Referring to fig. 2, the line segment of the positive half section profile of the longitudinal section of the planar lens includes a small-angle incident surface profile curve AB, a large-angle incident surface profile curve BC, a bottom surface profile curve CD, a first total reflection surface profile curve DE, a second total reflection profile curve EF, a transition curved surface profile curve FG, and an exit surface profile curve GH, where the curves CD, FG, and GH are straight line segments, and the curves AB, BC, DE, and EF are free curves.
The construction method of the curve AB is as follows: the curves AB and GH form a two-dimensional lens, the light energy emitted by the light source within an angle from 0 degree to alpha degree is subjected to spatial grid division through the rotation of the Z axis by 360 degrees, meanwhile, the target illumination surface is subjected to corresponding grid division according to proper illumination distribution, and the one-to-one corresponding relation between the light source grid and the target surface grid is established; assuming that the light source is a point light source located at the origin of coordinates S, where P is a selected starting point on the curve AB, the light SP emitted from the light source is incident on the point P on the curve AB, refracted at the point P, incident on the point Q of the curve GH, refracted again, and then emitted out of the lens to the point M on the target surface, as shown in fig. 4. Because the exit surface is the plane, because some GH are a straightway.
Let the unit vector of the incident light at the point P be In, and the unit vector of the corresponding emergent light be Out, then the catadioptric law of the vector form can be expressed as:
[n1 2+n2 2-2n1n2(In·Out)]1/2·N＝n1·Out-n2·In(1)
therefore, the normal vector at any point of the free-form surface is as follows:
N＝(n1·Out-n2·In)/P(2)
wherein,n1and n2The refractive indices of air and lens material, respectively.
The normal vector of the curve AB at the point P can be calculated by the formulas (1) and (2), so that the tangential direction vector is obtained, according to the established light source style division rule, the intersection point of the next light ray and the tangent line at the point P can be approximately regarded as a next coordinate point on the curve AB, and the numerical solution of the curve AB can be obtained by solving through some loop iterations.
Assuming that the point coordinate on GH of a certain ray irradiated on a point (x, y) on the target surface is (x, z), the point where the ray passes through the curve AB from the light source to (x, z) is (x, z)0,z0) Then, according to the catadioptric law of vector form, the point can be obtained by solving(x0,z0) The coordinate values of (2). And then, according to the established corresponding relation and the established differential equation, iterative solution can be carried out to obtain a numerical solution of the curve AB.
The curves BC, DE and GH form a two-dimensional lens, and the two-dimensional lens rotates 360 degrees along the Z axis to perform spatial grid division on the light energy emitted by the light source within an angle from an alpha angle to 90 degrees, and performs corresponding grid division on the target illumination surface according to proper illumination distribution to establish a one-to-one correspondence relationship between the light source grid and the target surface grid; assuming that the light source is a point light source located at the origin of coordinates S, P is a selected starting point on the curve BC, and Q is a selected starting point on the curve DE, the light SP emitted from the light source is incident on the point P on the curve BC, refracted at the point, incident on the point Q of the curve DE, totally reflected at the point, incident on the point R of the curve GH, refracted again, and emitted out of the lens to the point M of the target surface, as shown in fig. 5.
Assuming that the point coordinates of a certain light ray on GH which irradiates a point (x, y) on the target surface is (x, z), the light ray from the light source to the point (x, z) passing through the curve BC and the point on the curve DE are (x, z), respectively0,z0)，(x1,z1) Then, the point (x) can be obtained by solving according to the reflex law of vector form0,z0)，(x1,z1) The coordinate values of (2). And then, according to the established corresponding relation and the established differential equation, iterative solution can be carried out to obtain a numerical solution of the curve BC and the curve DE.
The numerical solution of the curve BC and DE can be obtained by solving the above equations (1) and (2) and the solving method which is the same as the curve AB.
The curve EF is constructed by mainly processing part of light totally reflected by the emergent face, and then emitting the light out of the emergent face again after the light is totally reflected, wherein the part of light is caused by a certain size of the light source, and a large workload is required for directly calculating, so that the design adopts a trial and error method for design, and the curve is obtained by performing optical design simulation on a designed lens, analyzing the trend of the light and repeatedly correcting a spline curve.
The curve EF is constructed by mainly processing part of light totally reflected by the emergent face, and then emitting the light out of the emergent face again after the light is totally reflected, wherein the part of light is caused by a certain size of the light source, and a large workload is required for directly calculating, so that the design adopts a trial and error method for design, and the curve is obtained by performing optical design simulation on a designed lens, analyzing the trend of the light and repeatedly correcting a spline curve.
As a further improvement of the technical scheme, a free curve formed by the intersection of the incident plane and the transverse central section of the transparent mirror body is asymmetrically arranged.
As shown in fig. 3, the line segment of the positive half section profile of the transverse section includes an incident surface profile curve ab, a curve bc, a bottom surface profile curve cd, a total reflection surface profile curve de, a total reflection profile curve ef, a transition surface profile fg, and an exit surface profile curve gh, where the curves cd, fg, and gh are straight line segments and the curves ab, bc, de, and ef are free curves.
Due to the adoption of the asymmetric design, the positive half section outline and the negative section outline are asymmetric in the transverse direction, the solving design needs to be carried out respectively, and the process is the same as the solving method of the positive half section outline curve of the longitudinal section.
The light rays emitted by the light source comprise small-angle light rays and large-angle light rays, wherein the small-angle light rays are emitted from the light source, are refracted by an incident surface to reach an emergent surface, are refracted by the incident surface and are emitted from the emergent surface, and all light ray combinations of rectangular light spots are formed in a horizontal plane at a certain distance; the large-angle light rays are emitted from a light source, are refracted by an incident surface to reach a total reflection surface, are refracted by a total reflection surface to reach an exit surface, are refracted, are emitted from the exit surface, and form rectangular light spots or all light ray combinations for enhancing a central area in a horizontal plane at a certain distance.
As a further improvement of the above technical solution, the material of the transparent mirror body is polymethyl methacrylate, polycarbonate, or glass.
An illumination lens apparatus comprising one or more of the above-described planar lenses.
Example 2, see fig. 9-15.
This embodiment is substantially the same as embodiment 1, except that this embodiment does not have the second total reflection surface in embodiment 1.
While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (9)
1. A planar lens, characterized by: the light source device comprises a transparent mirror body, wherein the transparent mirror body is provided with a bottom surface, a total reflection surface and an exit surface, an incident groove for accommodating a light source is arranged on the bottom surface towards the inner direction of the transparent mirror body, and the side wall of the incident groove is an incident surface.
2. A planar lens according to claim 1, wherein: the incidence plane comprises a small-angle incidence plane and a large-angle incidence plane.
3. A planar lens according to claim 2, wherein: and a transition curved surface is arranged between the total reflection surface and the emergent surface.
4. A planar lens according to claim 3, wherein: the total reflection surface comprises a first total reflection surface and a second total reflection surface.
5. A planar lens according to claim 4, wherein: the bottom surface and the emergent surface are planes, the incident surface and the total reflection surface are free curved surfaces, and the transition curved surface is an arc surface.
6. A planar lens according to claim 5, wherein: the free curve formed by the intersection of the incident plane and the longitudinal central section of the transparent lens body is symmetrically arranged.
7. A planar lens according to claim 5, wherein: the free curve formed by the intersection of the incident plane and the transverse central section of the transparent mirror body is asymmetrically arranged.
8. A planar lens according to claim 1, wherein: the transparent mirror body is made of polymethyl methacrylate, polycarbonate or glass.
9. An illumination lens apparatus, characterized in that: the illumination lens arrangement comprises one or more planar lenses of any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510734658.XA CN105423235B (en) | 2015-10-30 | 2015-10-30 | A kind of planar lens and the illuminating lens device based on the planar lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510734658.XA CN105423235B (en) | 2015-10-30 | 2015-10-30 | A kind of planar lens and the illuminating lens device based on the planar lens |
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| Publication Number | Publication Date |
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| CN105423235A true CN105423235A (en) | 2016-03-23 |
| CN105423235B CN105423235B (en) | 2019-07-02 |
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| CN201510734658.XA Expired - Fee Related CN105423235B (en) | 2015-10-30 | 2015-10-30 | A kind of planar lens and the illuminating lens device based on the planar lens |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106764817A (en) * | 2017-03-16 | 2017-05-31 | 厦门佰明光电股份有限公司 | The lens arrangement and auto lamp of a kind of LED car lamp |
| CN111207365A (en) * | 2019-08-07 | 2020-05-29 | 友达光电股份有限公司 | Optical lens, light-emitting device and backlight module |
| CN113803693A (en) * | 2020-06-11 | 2021-12-17 | 西安新骊电子技术有限责任公司 | Plane lens based on total reflection principle and transmission principle |
| CN113885107A (en) * | 2020-06-16 | 2022-01-04 | 佛山市青松科技股份有限公司 | Optical lens capable of increasing horizontal angle |
| CN114963082A (en) * | 2021-09-16 | 2022-08-30 | 青岛易来智能科技股份有限公司 | Lens and lighting equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106764817A (en) * | 2017-03-16 | 2017-05-31 | 厦门佰明光电股份有限公司 | The lens arrangement and auto lamp of a kind of LED car lamp |
| CN111207365A (en) * | 2019-08-07 | 2020-05-29 | 友达光电股份有限公司 | Optical lens, light-emitting device and backlight module |
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| CN113803693A (en) * | 2020-06-11 | 2021-12-17 | 西安新骊电子技术有限责任公司 | Plane lens based on total reflection principle and transmission principle |
| CN113885107A (en) * | 2020-06-16 | 2022-01-04 | 佛山市青松科技股份有限公司 | Optical lens capable of increasing horizontal angle |
| CN114963082A (en) * | 2021-09-16 | 2022-08-30 | 青岛易来智能科技股份有限公司 | Lens and lighting equipment |
| CN114963082B (en) * | 2021-09-16 | 2024-02-06 | 青岛易来智能科技股份有限公司 | Lens and lighting device |
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| CN105423235B (en) | 2019-07-02 |
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