WO2010066503A1 - Streuscheibe - Google Patents
Streuscheibe Download PDFInfo
- Publication number
- WO2010066503A1 WO2010066503A1 PCT/EP2009/064174 EP2009064174W WO2010066503A1 WO 2010066503 A1 WO2010066503 A1 WO 2010066503A1 EP 2009064174 W EP2009064174 W EP 2009064174W WO 2010066503 A1 WO2010066503 A1 WO 2010066503A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- facets
- lens
- facet
- center
- lenses
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0205—Diffusing elements; Afocal elements characterised by the diffusing properties
- G02B5/021—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures
- G02B5/0215—Diffusing elements; Afocal elements characterised by the diffusing properties the diffusion taking place at the element's surface, e.g. by means of surface roughening or microprismatic structures the surface having a regular structure
-
- 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
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/02—Diffusing elements; Afocal elements
- G02B5/0273—Diffusing elements; Afocal elements characterized by the use
- G02B5/0284—Diffusing elements; Afocal elements characterized by the use used in reflection
Definitions
- the invention is based on a lens according to the preamble of claim 1.
- Such scattering slides are used in particular as a cover glasses for reflectors, which are equipped with a light source.
- Light sources include incandescent lamps, discharge lamps or LEDs.
- the object of the present invention is to provide a lens that avoids inhomogeneous light intensity or illuminance as well as possible.
- Reflector lamps with high-pressure discharge lamps as a light source often have the problem that the Lichtell designated. Illuminance distribution is inhomogeneous in terms of light intensity and light color. The reason for this is found in the non-rotationally symmetrical uniform luminance distribution of the light source, for example by the arc curvature or the deposition of metal halide condensate in the discharge vessel.
- the lens has a multiplicity of convexly or concavely curved lenses whose lens radius determines the widening of the beam angle of the light intensity distribution curve (LVK).
- LVK light intensity distribution curve
- each individual lens generates its own LVK, which, in terms of its basic shape, should correspond to the final shape of the LD.
- the superimposition of the individual lens LVKs then causes the mixing of the different color values, so that a homogeneous distribution of the color values in the far field of the LDC arises.
- the lens facets have a uniform hexagonal shape.
- the uniformity of the lens shape is reflected in the luminous intensity distribution. This still reveals the hexagonal facet shape.
- the facet shape In order to achieve a rotationally symmetrical-and thus as uniform as possible-luminous intensity distribution, it is known that the facet shape must have a polygonal and non-uniform shape.
- the hexagonal outer contour of the facets results when the lens centers are arranged evenly distributed on hexagons, whereby the key widths of the hexagons increase by a constant amount, and the number of facets with each hexagon increases by 6.
- the area of the hexagonal facets is always the same size.
- the vertices of the hexagons each result in a series of facets that lie on a radially away line from the diffuser center.
- the patent DE-B4 10343630 also assumes a hexagonal facet structure, which results from the arrangement of the facets in a hexagon, as explained above.
- the basic approach here is that the "starting points" of the hexagons, which are located on a radial line in the prior art diffusing screen, are twisted according to a specific mathematical rule, for example, the angle of rotation can increase quadratically with increasing distance from the center this twisting of the hexagons superimposes the facets, so that now polygonal facets have emerged from originally hexagonal facets.
- the vertices of the facets are arranged along a spiral. The superimposition of the boundary surfaces of the initially circular facets leads to the formation of the polygonal facet geometry.
- the solution of the invention is characterized by a construction manual, with the help of which polygonal, irregular facet shapes of the lenses arise.
- the irregularity of the facet shapes causes the uniform rotationally symmetric light distribution.
- the lenses are arranged in a circle around the diffuser center. At least two circles, preferably at least four arrangement circles, are used.
- the lenses are thus arranged on circles so that immediately adjacent lenses of equal distance would overlap the lens center if they were regular hexagons.
- the concentric arrangement circles in particular have the same distance from each other. This means that the diameter of all circles increases to the outside by the same amount. In another embodiment, they have different distances.
- the diffuser preferably has at least 6 and at most 15 arrays.
- each array there is preferably at least one facet whose center coordinate xp, yp - meaning the vertex of the facet lens with the radius of curvature of the lens, which lens does not necessarily have to be curved, but can also be flat - on a common, radial line with the respective facets of the other arrangement circles lies.
- center coordinate particularly means the center of gravity of the polygon.
- the number of facets per array increases with increasing circle diameter. Preferably, it increases by a fixed amount. Regular and based on the concept of hexagonal facets according to the prior art, it increases by 6 facets per circle, with the exception of the transition from the central facet to the first circle. However, a better uniformity is achieved if, in at least one arrangement circle from the second circle, this rule is not adhered to, preferably towards higher values.
- a concept with eight circular rings where the number of facets increases according to the following specification: 1-6-12-18-25-31-37-43). For best results, provide a procedure in which the number of facets increases by 5 to 8. All lens surfaces, understood as regular hexagons, would overlap. There are no gaps between the facets.
- the spherical lenses are composed in a preferred embodiment of the intersection of balls.
- the sphere or lens radius is constant per array. Starting from the lens center, the lens radius per array can increase or decrease, so that at least three different lens radii per lens occur.
- Another embodiment in addition to the choice of different lens radii) in order to achieve differently sized facet surfaces and thus different polygonal facet shapes results from the axial arrangement of the ball centers. If the ball centers do not lie on a common plane or curve, the same effect results as with the choice of different lens radii.
- the distances of the centers of all facets of a circle according to a specific rule are given: the easiest way they are gleichabstopathy distributed over the circumference. Or they are distributed alternately with two predetermined distances, so that every second facet has a constant distance to the next but one facet.
- the facets are preferably at least quadrilaterals and highest heptagon.
- the individual polygons are preferably determined by the following rule: on the basis of circles as placeholders of the future polygons, which overlap across the entire area, the corners of the facets are placed in the middle of the intersections of at least three circles.
- the polygonal, irregular outer contour of the lenses results in a uniform, rotationally symmetric light distribution in the sum of all individual distribution curves.
- a hexagonal light distribution according to the prior art is thus avoided (see FIG. 1).
- the calculation rule for the determination of the center coordinates xp and yp is comparatively simple compared with the solutions according to the prior art. Connected with this, the production process of the press ram is easier.
- the different radii of the lenses can be adapted to the locally deviating beam expansion that the base reflector generates.
- the shape of the central facet is irrelevant to the present invention, that is, it does not come to be a regular hexagon.
- the polygons presented here can also be replaced by bodies with curved curves instead of straight connecting lines.
- the term polygon in this case is to be understood as the sole reference to the number of corners.
- facet essentially means the two-dimensional view, while the term lens additionally explicitly considers the spatial extent in the case of a curved lens.
- FIG 1 shows the light distribution according to the invention (Ia) and according to the prior art (Ib);
- Fig. 2 is a lens according to the prior art
- FIG. 3 is a schematic diagram of the radial radiation set
- Fig. 5 is a schematic diagram of the extension of the facets
- FIG. 6 shows a high-pressure discharge lamp with a lens according to the invention.
- FIG. 1a schematically shows the light distribution of a diffusion plate according to the invention. It is almost circular.
- Figure Ib shows the light distribution of a prior art lens. It reveals radial inhomogeneities, especially in the peripheral areas.
- FIG. 2 shows a conventional diffusing screen 1, which consists of regular hexagonal facets 2.
- the hexagonal symmetry of this arrangement remains basically in each Ring 3 obtained from facets and can ultimately be seen in the light distribution thus generated, see Figure Ib.
- Table 1 An example table (Table 1) for five rings arranged around a central facet (here the central facet is assumed in particular as a regular hexagon) is given below.
- a radial beam of facets with common coordinate xp is used.
- the size a is the distance of the circular rings from each other.
- the coordinates of the facets of this central ray are given below (coordinates refer to the center of gravity).
- FIG. 3 shows the principle of the initially circular arrangement of lenses, wherein the circle distances a have been selected to be equal in each case here.
- the center of gravity of the radial radiation set 10 is first defined on facets.
- the distances of the center points of the circular rings, here a, must be selected at least such that they result in an overlap of all the lenses that fill the entire lens area.
- the number of lenses per annulus is determined, preferably at least 5 and a maximum of 8 additional lenses per sequence circle should be selected in order to obtain a uniform illumination as possible.
- the distance rule of the lenses per circle is determined: in particular uniform distance or alternately uniform distance, etc.
- FIG. 4 shows, taking into account the radial radiation lens set 10 and its left, 11, and right neighbors 12, how the shape of the facets associated with the radial beam set 10 arises.
- the corners of the polygons are each placed in the center of gravity of overlapping lens surfaces, provided that at least three lenses overlap, ie have a common intersection. This should be at least punctiform.
- FIG. 5 now shows how this generation rule is extended to further facets that are outside of the radial beam set 10.
- the described rule leads to the generation of irregular, polygonal facets 20 and even permits the special consideration of local inhomogeneities, which arise due to special features of the light source or the reflector.
- Figure 6 shows a reflector lamp 25 with a PAR reflector 26 and a lens 1, which was created according to such a rule.
- An integral lamp 27 is arranged in the reflector.
- each facet is assigned a center, which can be determined in various ways.
- the center of gravity is the center of gravity of the facet formed by the facet. ten polygons. It may simply be the vertex of the lens at the radius of curvature of the lens.
- the design of the lens is chosen so that an ordinary PAR lamp is predetermined with a predetermined light source whose opening define the dimensions of the lens. Then, a relatively small number of circular rings is first selected (usually four to 12, preferably 6 to 12) and set a requirement for the homogeneity of the light emission. If this requirement can not be met with the selected number of circular rings, the number of circular rings is gradually increased.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Optical Elements Other Than Lenses (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011538918A JP5465254B2 (ja) | 2008-12-08 | 2009-10-28 | 拡散板 |
US13/133,153 US20110235336A1 (en) | 2008-12-08 | 2009-10-28 | Diffusing plate |
CN200980149272.5A CN102246066B (zh) | 2008-12-08 | 2009-10-28 | 漫射片 |
EP09749052A EP2356498A1 (de) | 2008-12-08 | 2009-10-28 | Streuscheibe |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008060969A DE102008060969A1 (de) | 2008-12-08 | 2008-12-08 | Streuscheibe |
DE102008060969.2 | 2008-12-08 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010066503A1 true WO2010066503A1 (de) | 2010-06-17 |
Family
ID=41478961
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2009/064174 WO2010066503A1 (de) | 2008-12-08 | 2009-10-28 | Streuscheibe |
Country Status (6)
Country | Link |
---|---|
US (1) | US20110235336A1 (de) |
EP (1) | EP2356498A1 (de) |
JP (1) | JP5465254B2 (de) |
CN (1) | CN102246066B (de) |
DE (1) | DE102008060969A1 (de) |
WO (1) | WO2010066503A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012173522A (ja) * | 2011-02-22 | 2012-09-10 | Panasonic Corp | 光学部材及び照明器具 |
JP5980534B2 (ja) * | 2012-03-26 | 2016-08-31 | 株式会社遠藤照明 | 照明ランプ用レンズ板および照明ランプ |
DE202015106994U1 (de) * | 2015-12-22 | 2017-03-23 | Rehau Ag + Co | Streuscheibe |
US10649130B2 (en) | 2016-04-22 | 2020-05-12 | Signify Holding B.V. | Pebble-plate like louvre with specific domain characteristics |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5442252A (en) * | 1992-11-16 | 1995-08-15 | General Electric Company | Lenticulated lens with improved light distribution |
US5580164A (en) * | 1995-03-07 | 1996-12-03 | High End Systems, Inc. | Power lens for an automated luminaire |
US5897201A (en) * | 1993-01-21 | 1999-04-27 | Simon; Jerome H. | Architectural lighting distributed from contained radially collimated light |
EP0961136A2 (de) * | 1998-05-28 | 1999-12-01 | CLAY PAKY S.p.A. | Optischer Diffusor und damit ausgerüstete Beleuchtungseinrichtung |
US6086227A (en) * | 1998-09-11 | 2000-07-11 | Osram Sylvania Inc. | Lamp with faceted reflector and spiral lens |
US6616305B1 (en) * | 1999-03-01 | 2003-09-09 | Jerome H. Simon | Illumination derived from luminaires comprised of radial collimators and refractive structures |
DE10343630A1 (de) * | 2003-09-20 | 2005-05-25 | Schott Ag | Streuscheibe |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2310600A (en) * | 1941-02-17 | 1943-02-09 | Ray J Robinson | Illuminated sign |
JPH0221316Y2 (de) * | 1985-02-26 | 1990-06-08 | ||
JPS63204201A (ja) * | 1987-02-20 | 1988-08-23 | Ichikoh Ind Ltd | 信号用灯具の前面レンズ |
US4991073A (en) * | 1989-03-08 | 1991-02-05 | Gte Products Corporation | Lighting lens |
CA2108959A1 (en) * | 1992-11-16 | 1994-05-17 | Thomas M. Golz | Lenticular lens |
-
2008
- 2008-12-08 DE DE102008060969A patent/DE102008060969A1/de not_active Ceased
-
2009
- 2009-10-28 US US13/133,153 patent/US20110235336A1/en not_active Abandoned
- 2009-10-28 WO PCT/EP2009/064174 patent/WO2010066503A1/de active Application Filing
- 2009-10-28 JP JP2011538918A patent/JP5465254B2/ja not_active Expired - Fee Related
- 2009-10-28 EP EP09749052A patent/EP2356498A1/de not_active Withdrawn
- 2009-10-28 CN CN200980149272.5A patent/CN102246066B/zh not_active Expired - Fee Related
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5442252A (en) * | 1992-11-16 | 1995-08-15 | General Electric Company | Lenticulated lens with improved light distribution |
US5897201A (en) * | 1993-01-21 | 1999-04-27 | Simon; Jerome H. | Architectural lighting distributed from contained radially collimated light |
US5580164A (en) * | 1995-03-07 | 1996-12-03 | High End Systems, Inc. | Power lens for an automated luminaire |
EP0961136A2 (de) * | 1998-05-28 | 1999-12-01 | CLAY PAKY S.p.A. | Optischer Diffusor und damit ausgerüstete Beleuchtungseinrichtung |
US6086227A (en) * | 1998-09-11 | 2000-07-11 | Osram Sylvania Inc. | Lamp with faceted reflector and spiral lens |
US6616305B1 (en) * | 1999-03-01 | 2003-09-09 | Jerome H. Simon | Illumination derived from luminaires comprised of radial collimators and refractive structures |
DE10343630A1 (de) * | 2003-09-20 | 2005-05-25 | Schott Ag | Streuscheibe |
Also Published As
Publication number | Publication date |
---|---|
EP2356498A1 (de) | 2011-08-17 |
CN102246066B (zh) | 2014-03-05 |
JP5465254B2 (ja) | 2014-04-09 |
JP2012511165A (ja) | 2012-05-17 |
US20110235336A1 (en) | 2011-09-29 |
DE102008060969A1 (de) | 2010-06-10 |
CN102246066A (zh) | 2011-11-16 |
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