CN102537832B - Fresnel lens and lamp with same - Google Patents
Fresnel lens and lamp with same Download PDFInfo
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- CN102537832B CN102537832B CN201010610610.5A CN201010610610A CN102537832B CN 102537832 B CN102537832 B CN 102537832B CN 201010610610 A CN201010610610 A CN 201010610610A CN 102537832 B CN102537832 B CN 102537832B
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- lateral wall
- ring groove
- lens
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Abstract
The invention relates to a Fresnel lens and a lamp with the same. The Fresnel lens comprises an incident surface and a concave refracting surface opposite to the incident surface, and is characterized in that: the concave refracting surface is formed by dividing a plurality of concentrically-formed annular grooves; each annular groove comprises an inner side wall close to an optical axis of the lens and an outer side wall far away from the optical axis of the lens; the inner side wall of each annular groove is vertical to the incident surface; and the outer side wall of each annular groove is inclined to the optical axis of the lens. The concave refracting surface is formed by dividing the concentrically-formed annular grooves and is not a single concave refracting surface, so that the thickness, volume and occupied space of the lens are greatly reduced, the volume of the lamp with the lens is also greatly reduced, installation and design difficulty is reduced, manufacturing materials are saved, and waste and cost are reduced; and meanwhile, after parallel light is emitted by the Fresnel lens, a floodlight illumination beam with a half-intensity angle of about 40 degrees is generated for floodlight illumination.
Description
[technical field]
The present invention relates to a kind of optical lens, relate in particular to a kind of Fresnel Lenses and use the light fixture of this Fresnel Lenses.
[background technology]
At present, when light fixture carries out floodlighting, need to use Fresnel Lenses light beam of light source is become to flood beam.
Tradition Fresnel Lenses, has the plane of incidence and single refractive, concave surface (being generally concave surface).But, single refractive, concave surface can cause the thickness of lens excessive (being generally greater than 10mm), thereby the space that lens are taken is larger, increased the difficulty of mounting design, cause using the light fixture volume of flood lens excessive, expend too much manufactured materials, cause waste, cost is increased.
[summary of the invention]
In view of this, be necessary the Fresnel Lenses that provides a kind of thickness little.
In addition, provide a kind of light fixture that uses above-mentioned Fresnel Lenses.
A kind of Fresnel Lenses, comprise the plane of incidence and the refractive, concave surface relative with the described plane of incidence, described refractive, concave surface is split to form by the ring groove of multiple concentric settings, described ring groove comprises a madial wall near described lens axis and a lateral wall away from described lens axis, the madial wall of described ring groove is perpendicular to the plane of incidence, and the lateral wall of described ring groove tilts towards lens axis.
Preferably, the described plane of incidence is plane, and the madial wall of described multiple ring grooves be arranged in parallel, and the lateral wall radius-of-curvature of described ring groove increases progressively successively with fixed value.
Preferably, described refractive, concave surface is split to form by three ring grooves that arrange with one heart, respectively outwards is: the first ring groove, the second ring groove and ring groove by lens axis.
Preferably, described the first ring groove comprises the first madial wall and the first lateral wall, described the first ring groove also comprises a center disc, the second madial wall that described the second ring groove comprises and the second lateral wall, and the 3rd ring groove comprises the 3rd madial wall and the 3rd lateral wall;
The radius-of-curvature of described center disc, the first lateral wall, the second lateral wall and the 3rd lateral wall increases progressively successively with fixed value.
Preferably, the radius-of-curvature of described center disc is 13 to 15mm, and the radius-of-curvature of described the first lateral wall is 15 to 17mm, and the radius-of-curvature of described the second lateral wall is 17 to 19mm, and the radius-of-curvature of described the 3rd lateral wall is 19 to 21mm.
Preferably, the radius-of-curvature of described center disc is 14mm, and the radius-of-curvature of described the first lateral wall is 16mm, and the radius-of-curvature of described the second lateral wall is 18mm, and the radius-of-curvature of described the 3rd lateral wall is 20mm.
Preferably, described center disc is 1mm along minimum thickness between lens axis and the described plane of incidence; Described the first lateral wall is 0.5mm along minimum thickness between lens axis and the described plane of incidence; Described the second lateral wall is 0.5mm along minimum thickness between lens axis and the described plane of incidence; Described the 3rd lateral wall is 0.5mm along minimum thickness between lens axis and the described plane of incidence.
Preferably, described Fresnel Lenses external diameter is 31.5 to 34mm, and thickness is vertically 4 to 5.5mm.
Preferably, described Fresnel Lenses external diameter is 32.5mm, and thickness is vertically 4.5mm.
A kind of light fixture, comprises Fresnel Lenses, and described Fresnel Lenses is above-mentioned Fresnel Lenses.
Above-mentioned luxuriant and rich with fragrance Neil lens and use the light fixture of this Fresnel Lenses, refractive, concave surface is split to form by the ring groove of multiple concentric settings, but not single refractive, concave surface, thereby greatly reduce the thickness of lens, greatly reduce lens volume and take up room, make to use the light fixture volume of these lens also to greatly reduce, reduced the difficulty of mounting design, saved manufactured materials, cut the waste, made cost.
Meanwhile, directional light produces the floodlighting light beam of 40 degree left and right, half light intensity angle after this Fresnel Lenses outgoing, carries out floodlighting.
[accompanying drawing explanation]
Fig. 1 is a Fresnel lens structure axial section in embodiment;
Fig. 2 is a Fresnel lens structure rear view in embodiment;
Fig. 3 is a Fresnel lens structure side view in embodiment;
Fig. 4 is Fresnel lens luminous intensity distribution figure in an embodiment.
[embodiment]
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Fresnel Lenses comprises the plane of incidence and the refractive, concave surface relative with the plane of incidence, this refractive, concave surface is split to form by the ring groove of multiple concentric settings, ring groove comprises that one near the madial wall of lens axis and away from the lateral wall of lens axis, the madial wall of ring groove is perpendicular to the plane of incidence, and the lateral wall of ring groove tilts towards lens axis.The lateral wall radius-of-curvature of ring groove increases progressively successively with fixed value.
Fig. 1 is a Fresnel lens structure axial section in embodiment.Fig. 2 is a Fresnel lens structure rear view in embodiment.Fig. 3 is a Fresnel lens structure side view in embodiment.
In conjunction with Fig. 1 to Fig. 3, this Fresnel Lenses comprises the plane of incidence 100 and refractive, concave surface 200.Refractive, concave surface 200 is split to form by the ring groove 300 of multiple concentric settings, ring groove 300 comprises that one near the madial wall of lens axis 400 and away from the lateral wall of lens axis 400, the madial wall of ring groove 300 is perpendicular to the plane of incidence 100, and the lateral wall of ring groove 300 tilts towards lens axis 400.The lateral wall of multiple ring grooves 300 is radius-of-curvature difference each other.
In this embodiment, the plane of incidence 100 is plane.
Refractive, concave surface 200 is split to form by three ring grooves 300 that arrange with one heart, respectively outwards is: the first ring groove 310, the second ring groove 320 and the 3rd ring groove 330 by lens axis 400.
The first ring groove 310 comprises that one near the first madial wall 311 of lens axis 400 and away from the first lateral wall 312 of lens axis 400.The first ring groove 310 also comprises a center disc 313.The second sub-ring groove 320 comprises that one near the second madial wall 321 of lens axis 400 and away from the second lateral wall 322 of lens axis 400.The 3rd ring groove 330 comprises that one near the 3rd madial wall 331 of lens axis 400 and away from the 3rd lateral wall 332 of lens axis 400.
The first madial wall 311, the second madial wall 321 and the 3rd madial wall 331 are set parallel to each other.
The radius-of-curvature of center disc 313, the first lateral wall 312, the second lateral wall 322 and the 3rd lateral wall 332 increases progressively successively with fixed value.
The radius of curvature R 1 of center disc 313 is 13 to 15mm, is preferably 14mm, along minimum thickness D1 between lens axis 400 and the plane of incidence 100, is 1mm;
The radius of curvature R 2 of the first lateral wall 312 is 15 to 17mm, is preferably 16mm, along minimum thickness D2 between lens axis 400 and the plane of incidence 100, is 0.5mm;
The radius of curvature R 3 of the second lateral wall 322 is 17 to 19mm, is preferably 18mm, along minimum thickness D3 between lens axis 400 and the plane of incidence 100, is 0.5mm;
The radius of curvature R 4 of the 3rd lateral wall 332 is 19 to 21mm, is preferably 20mm, along minimum thickness D4 between lens axis 400 and the plane of incidence 100, is 0.5mm.
In this embodiment, Fresnel Lenses material adopts PMMA (poly-methyl-propyl acid methyl esters, i.e. organic glass), one-body molded.External diameter is 31.5 to 34mm, is preferably 32.5mm, and thickness is vertically 3.5 to 5mm, is preferably 4.5mm.
Fig. 4 is Fresnel lens luminous intensity distribution figure in an embodiment.This Fresnel Lenses, directional light incides refractive, concave surface 200 by the plane of incidence 100, and refractive, concave surface 200 is separated by three ring grooves 300, the lateral wall radius-of-curvature difference of ring groove 300, directional light is reflected, directional light is become to flood beam, realize floodlighting.After measured, directional light, through this Fresnel Lenses outgoing, produces the floodlighting light beam of 40 degree left and right, half light intensity angle, meets the floodlighting requirement of most of light fixtures.It is not single curved surface that refractive, concave surface 200 is split to form by ring groove 300, thereby has greatly reduced the thickness of lens, takes up room and greatly diminishes.
In other embodiments, lens also can adopt glass material.
In addition, also provide a kind of light fixture that uses above-mentioned Fresnel Lenses.
Above-mentioned luxuriant and rich with fragrance Neil lens and use the light fixture of this Fresnel Lenses, refractive, concave surface is split to form by the ring groove of multiple concentric settings, but not single refractive, concave surface, thereby greatly reduce the thickness of lens, greatly reduce lens volume and take up room, make to use the light fixture volume of these lens also to greatly reduce, reduced the difficulty of mounting design, saved manufactured materials, cut the waste, made cost.
Meanwhile, directional light produces the floodlighting light beam of 40 degree left and right, half light intensity angle after this Fresnel Lenses outgoing, carries out floodlighting.
The above embodiment has only expressed several embodiment of the present invention, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection domain of patent of the present invention should be as the criterion with claims.
Claims (4)
1. a Fresnel Lenses, comprise the plane of incidence and the refractive, concave surface relative with the described plane of incidence, described refractive, concave surface is split to form by the ring groove of multiple concentric settings, described ring groove comprises a madial wall near described lens axis and a lateral wall away from described lens axis, the madial wall of described ring groove is perpendicular to the plane of incidence, the lateral wall of described ring groove tilts towards lens axis, it is characterized in that, the described plane of incidence is plane, and the madial wall of described multiple ring grooves be arranged in parallel;
Described refractive, concave surface is split to form by three ring grooves that arrange with one heart, respectively outwards is: the first ring groove, the second ring groove and ring groove by lens axis;
Described the first ring groove comprises the first madial wall and the first lateral wall, described the first ring groove also comprises a center disc, the second madial wall that described the second ring groove comprises and the second lateral wall, the 3rd ring groove comprises the 3rd madial wall and the 3rd lateral wall;
The radius-of-curvature of described center disc, the first lateral wall, the second lateral wall and the 3rd lateral wall increases progressively successively with fixed value;
The radius-of-curvature of described center disc is 13 to 15mm, and the radius-of-curvature of described the first lateral wall is 15 to 17mm, and the radius-of-curvature of described the second lateral wall is 17 to 19mm, and the radius-of-curvature of described the 3rd lateral wall is 19 to 21mm;
Described center disc is 1mm along minimum thickness between lens axis and the described plane of incidence; Described the first lateral wall is 0.5mm along minimum thickness between lens axis and the described plane of incidence; Described the second lateral wall is 0.5mm along minimum thickness between lens axis and the described plane of incidence; Described the 3rd lateral wall is 0.5mm along minimum thickness between lens axis and the described plane of incidence;
Described Fresnel Lenses external diameter is 31.5 to 34mm, and thickness is vertically 4 to 5.5mm.
2. Fresnel Lenses according to claim 1, it is characterized in that, the radius-of-curvature of described center disc is 14mm, and the radius-of-curvature of described the first lateral wall is 16mm, the radius-of-curvature of described the second lateral wall is 18mm, and the radius-of-curvature of described the 3rd lateral wall is 20mm.
3. according to the Fresnel Lenses of claim 1, it is characterized in that, described Fresnel Lenses external diameter is 32.5mm, and thickness is vertically 4.5mm.
4. a light fixture, comprises Fresnel Lenses, it is characterized in that, described Fresnel Lenses is the arbitrary described Fresnel Lenses of the claims 1 to 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010610610.5A CN102537832B (en) | 2010-12-29 | 2010-12-29 | Fresnel lens and lamp with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010610610.5A CN102537832B (en) | 2010-12-29 | 2010-12-29 | Fresnel lens and lamp with same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102537832A CN102537832A (en) | 2012-07-04 |
| CN102537832B true CN102537832B (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010610610.5A Expired - Fee Related CN102537832B (en) | 2010-12-29 | 2010-12-29 | Fresnel lens and lamp with same |
Country Status (1)
| Country | Link |
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| CN (1) | CN102537832B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103851374A (en) * | 2012-12-05 | 2014-06-11 | 鸿富锦精密工业（深圳）有限公司 | Light-emitting diode group and lens thereof |
| CN103900022A (en) * | 2012-12-27 | 2014-07-02 | 鸿富锦精密工业（深圳）有限公司 | Lens and backlight module with lens |
| TWI551892B (en) * | 2015-09-02 | 2016-10-01 | 原相科技股份有限公司 | Multi-segment Optical Component and Related Optical Detecting Device Capable of Increasing SNR |
| CN114966918A (en) * | 2022-07-25 | 2022-08-30 | 允沃能源科学研究(江苏)有限公司 | Fresnel lens and imaging system with same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59205774A (en) * | 1983-05-09 | 1984-11-21 | Nec Corp | Semiconductor light-emitting element |
| JPS63165802A (en) * | 1986-12-27 | 1988-07-09 | Masao Kanazawa | Sheet lens and video recording and reproducing method using same |
| JP3445420B2 (en) * | 1995-09-01 | 2003-09-08 | 株式会社村上開明堂 | Rear view device for vehicles |
| JP5181703B2 (en) * | 2008-02-06 | 2013-04-10 | 株式会社ジェイテクト | Processing method of concave Fresnel lens shaped member and concave Fresnel lens shaped member |
| KR101054157B1 (en) * | 2009-05-01 | 2011-08-03 | 희성전자 주식회사 | LED package to improve optical directivity |
-
2010
- 2010-12-29 CN CN201010610610.5A patent/CN102537832B/en not_active Expired - Fee Related
Non-Patent Citations (4)
| Title |
|---|
| JP昭59-205774A 1984.11.21 |
| JP昭63-165802A 1988.07.09 |
| JP特开2009-184066A 2009.08.20 |
| JP特开平9-66772A 1997.03.11 |
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| CN102537832A (en) | 2012-07-04 |
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Granted publication date: 20140507 Termination date: 20181229 |