EA026835B1 - Rotational asymmetric para-ellipsoidal and biellipsoidal reflectors for lighting installations - Google Patents

Abstract

The object of the present invention is a procedure for construction of a rotational asymmetric assembled reflector (6, 12) for projectors for lighting installations, with an angle of asymmetry, α, between an axis corresponding to a light beam of maximum light intensity and an axis orthogonal to a light output plane, comprising construction of a rotationally symmetrical solid (5, 10) symmetrical with respect to an axis of rotation (X), formed by two rotationally symmetrical solids (65, 66, 125, 126) having a same tangent plane (69, 129) at common points (68, 128) along a conjunction line (67, 127) of said rotationally symmetrical solids (65, 66, 125, 126); cutting of said rotationally symmetrical solid (5, 10) according to a cutting plane (60) inclined to an axis (Y) orthogonal to said axis of rotation (X), by an angle corresponding to the said angle of asymmetry, α, aimed at obtaining two parts (51, 52, 111, 112); rotation of about 180° of one (52, 112) of the two parts obtained by means of said cutting around an axis orthogonal to a plane (X, Y) containing said axis of rotation (X) and its orthogonal axis (Y); assembling of the parts (51, 52, 111, 112) thanks to connecting means (61, 121); overlapping of a quantity (OL) of one part (52, 112) with respect to the other part (51, 111); adjustment of the inclination of the parts (51, 52, 111, 112) according to a optimum light performance; assembling (62, 122) of the parts (51, 52, 111, 112).

Description

(57) An object of the present invention is a method for manufacturing an axisymmetric reflector (6, 12) assembled for a searchlight for lighting installations with an asymmetry angle a between the axis corresponding to the light beam of the highest light intensity and the axis perpendicular to the output plane of light containing the manufacture of an axisymmetric body (5, 10), symmetric about the axis of rotation (X), formed by two axisymmetric bodies (65, 66, 125, 126), having the same tangent plane (69, 129) at common points (68, 128) along the line (67, 127) with of the connections of said axisymmetric body (65, 66, 125, 126); cutting said axisymmetric body (5.10) along a cutting plane (60) inclined relative to an axis (Υ) perpendicular to said axis of rotation (X) by an angle corresponding to said asymmetry angle a, aimed at obtaining two parts (51.52,111,112) ; about 180 ° rotation of one (52, 112) of two parts obtained by said cutting around an axis perpendicular to the plane (X, Υ) containing said axis of rotation (X) and an axis perpendicular to it (Υ); assembly of parts (51, 52, 111, 112) thanks to connecting means (61, 121); overlapping by a distance (O) of one part (52, 112) relative to the other part (51, 111); adjusting the inclination of the parts (51, 52, 111, 112) according to the optimal light characteristic; assembly (62, 122) of parts (51, 52, 111, 112).

The present invention relates to axisymmetric para-elliptical and bieleptic reflectors for lighting installations.

Symmetric floodlights are equipped with both trapezoidal and rotary reflectors and allow to obtain the highest light intensity (about 15,000 candelas) when tilted about 0 ° relative to the vertical perpendicular to the glass; the light intensity of the above-mentioned symmetrical floodlights decreases rapidly with a deviation from 0 °. Correspondingly symmetrical floodlights are especially useful in sports facilities shooting for color television, where high illumination is required and, therefore, high light intensity is required in a limited area of the sports field. The reflector must be tilted significantly if a high light intensity is required in an area far from the vertical.

However, the slope of the symmetrical reflector leads to light pollution (upward scattering of light), which makes symmetric reflectors not applicable in some cases due to restrictions established by international regulations. FIG. 25 shows the well-known symmetric reflector §E, inclined at an angle α, through the glass V of which the beam of the highest intensity ΜΙΕ emitted by the lamp b passes perpendicularly. The slope P of the reflector creates an upward diffused light flux (light pollution).

Asymmetric projectors, usually with a trapezoidal reflector, allow to obtain the highest light intensity far from 0 °, but it is much less (no more than 1000-1400 candelas with an asymmetry angle of 40-60 °).

Consequently, trapezoidal asymmetric floodlights solve the problem of light pollution, since they have glass parallel to the site, but they provide much lower light intensity (10 times less) than symmetrical floodlights. This creates significant problems when it is necessary to illuminate large spaces such as sports fields or the like. FIG. 26 shows a known asymmetric reflector AE with an angle of asymmetry α, through the horizontal glass V of which passes the beam of the highest intensity излуч emitted by the lamp b, inclined relative to the vertical in accordance with the said angle of asymmetry. Pay attention to the absence of upward diffused light flux (light pollution).

If asymmetric floodlights are used to limit light pollution, their number should be increased in order to compensate for the low light intensity of each reflector, thereby increasing installation costs and its complexity.

Moreover, asymmetric floodlights have a negligible light intensity in the direction of 0 ° (for example, about 250 candelas), which causes imperfect lighting on the site, for example on football fields.

There are international standards that determine the uniformity of illumination of I1 and I2, which manufacturers must comply with. In particular, if E is the illumination value, the following are determined:

u1 = E smallest / E mean; u2 = E smallest / E largest;

E least = lowest field illumination;

E highest = highest field illumination;

E average = average field illumination.

According to the rules, and 1 must be greater than or equal to 0.7, while I2 must be greater than or equal to 0.5.

If many asymmetric spotlights are mounted on one support, the total highest intensity increases in the direction of the asymmetry angle (for example, 40 °), but the light intensity increases even more under the support, that is, an increase in E of the average and E of the largest as a result reduces the values of I1 and I2 to values below the thresholds required by the rules.

This means that if it is necessary to illuminate an international football field, with the need for high values of light intensity, it is necessary to use tilted symmetrical floodlights, which as a result significantly increase light pollution. Only international exceptions to the rules allow the use of the aforementioned symmetrical floodlights with a high level of light pollution in sports fields with shooting for color television, due to the impossibility of having high light intensities and large angles without upward scattered radiation.

In order to illuminate smaller football fields where the mentioned exceptions do not apply, the manufacturer is forced to use asymmetric floodlights, increasing their number and increasing the height of the support in order to compensate for the insufficient uniformity of lighting. As a result, costs also increase by 60%.

Asymmetric circular reflector assemblies are known that reproduce the optical structure given by a composition of various curves. In particular, said curves overlap conical sections connected appropriately to optimally and continuously reflect

- 1,026,835 light energy emitted by lighting installations.

Asymmetric reflectors assembly of the prior art, both round and rectangular, are represented by various patents.

The document \ νϋ 0077445 describes an asymmetric reflector assembly formed by a plurality of hyperbolas that provide shading elimination, energy saving and pleasant lighting. The asymmetric reflector assembly is made of: a first section formed along the curve of the first hyperbola; a second section formed along a curve of the second hyperbola; third section forming an arc. The three sections mentioned are inclined accordingly in order to create continuous systems of reflected light on the illuminated surface.

EP 2093482 describes a reflector comprising a light source of a type made of three zones: the base of the reflector is occupied by a parabolic surface; ends with an elliptical surface; The transition zone is located between the two zones. The reflector assembled in this way allows you to control the amount of reflected lighting compared to direct lighting.

EP 2019 255 describes a reflector formed by a combination of parabolic and elliptical sections, which allows the combination of direct lighting and reflected lighting.

Document I8 4942507 describes a reflector having an elliptical shape in the plane Υ = 0 and a parabolic shape in the plane Ζ = 0, moreover, Υ and Ζ belong to the Cartesian space having the coordinates x, y and ζ, creating a rectangular light field and uniform radiation density. The shape of the reflector is achieved through a geometric formula based on the parameters of the hyperbola and parabola.

Document EP1126210 describes a car headlight reflector in which the first elliptical reflective surface has a focus that coincides with the focus of the second elliptical reflective surface, the optical axis of the first reflective surface being inclined at right angles to the optical axis of the second reflective surface. The parabolic reflective system has a focus that coincides with the second focus of said second elliptical reflective surface, the optical axis coinciding with the direction of illumination.

Document CB 1183481 describes a reflector whose surface consists of a parabola inclined so as to intersect the Υ axis of the hyperbola at a point of common focus, and thus rotated relative to its axis, in order to form a paraboloid. In particular, the solution is configured to be configured in various combinations with surfaces having a parabolic, hyperbolic, parabolocylindrical, hyperbolocylindrical or planar shape.

Document νθ 2011107901 describes an optical device containing a region formed by a first surface having a first Bezier curve and a second surface having a second Bezier curve, said Bezier curves being arranged so that the optical device is axisymmetric with respect to its central axis, ensuring uniform distribution of illumination in horizontal and vertical direction on a given area of lighting, pulled by a certain angle.

Document νθ 2010146494 describes a lighting device comprising a reflector made around a main axis, in which the rear part contains a portion rotated about an axis perpendicular to said main axis, providing an asymmetric light distribution at the output of said rear part. Alternatively, the back is conical or parabolic.

Therefore, prior art asymmetric reflectors are known for arranging surfaces formed by various conical curves to optimize light intensity and efficiency.

The problem based on the use of asymmetric reflectors is the difficulty of controlling the direction and distribution of light intensity in space, that is, the practical implementation of the angle of asymmetry in the structure.

This problem is mainly characteristic of axisymmetric reflectors, due to the presence of many reflections of the optical path occurring on most planes through which the main optical axis of the reflector passes. Therefore, asymmetric reflectors of the prior art are focused on the development of rectangular floodlights equipped with a light path that is easier to control, leaving the efficiency problem of axisymmetric floodlights virtually unresolved.

According to the prior art, the structure of an axisymmetric reflector is based on: creating a combined curve by means of various conical sections; rotation of the combined curve a full revolution relative to the optical axis of the reflector; creating a spatial figure; connecting the edges of the spatial figure. From a structural point of view, an axisymmetric reflector requires a three-dimensional body casting machine configured to reproduce the contour of a spatial figure; three-dimensional connecting and cutting tools. The finish of the device is based on the choice of materials having strong reflective properties, and on the application of metal coatings on reflective surfaces.

- 2 026835

An object of the present invention is to determine a method of manufacturing a searchlight with an axisymmetric reflector, by which the asymmetry angle is easily controlled, that is, manufacturing a reflector with an asymmetry angle is simple.

A second object of the present invention is to provide a floodlight with an axisymmetric reflector that has the highest values of light intensity, similar to symmetrical floodlights, and at least with the same efficiency.

An additional objective of the present invention is to provide illumination of important sports facilities and filming for color television with distributed lighting only using asymmetric reflectors without the formation of light pollution, where distributed lighting refers to the distributed arrangement of spotlights above or below the roof of the stands of the stadium.

Another additional objective of the present invention is to provide a floodlight with an axisymmetric reflector with uniform illumination values corresponding to the rules for small and medium-sized football fields without increasing the height of the supports and without the formation of light pollution.

According to the invention, such a task is achieved by a method of manufacturing an axisymmetric reflector assembly for floodlights for lighting installations according to claim 1.

According to the invention, such additional tasks are achieved by a method for manufacturing an axisymmetric reflector assembly for a searchlight for lighting installations according to claim 4.

The present invention will be described by means of a number of preferred embodiments thereof, given by way of non-limiting example, with reference to the accompanying drawings, in which FIG. 1 shows a geometric figure in the X, Υ plane, in a Cartesian space bounded by three X, Υ, Ζ axes, consisting of an ellipse symmetrical about the Cartesian axes, and two identical parabolas symmetric about the ри axis and tangent to the ellipse related to the present invention ;

FIG. 2 shows the geometric figure of FIG. 1 without half lying in the positive part of the 0-X axis;

FIG. 3 shows a section obtained from the geometric figure of FIG. 2 without half lying in the negative part of the 0-оси axis, provided with a sheet thickness of the material used to form the reflector according to the present invention;

FIG. 4 and 5 show axonometric views of an axisymmetric body obtained by rotating the section of FIG. 3 around the X axis according to the present invention;

FIG. 6 and 7 show a view in projection onto the X, Υ plane and an axonometric view of the body of FIG. 4 and 5, respectively, divided into two parts in accordance with a plane parallel to the Ζ axis, tilted by an angle α relative to the Υ axis and transferred to a height of Υ = Υ 0, according to the present invention;

FIG. 8 shows a view in projection on the plane X, Υ of two parts of the body of FIG. 6 and FIG. 7, the second part of the said body being rotated through an angle of 180 ° relative to the axis parallel to the оси axis, and with the transfer Υ = Υ0, according to the present invention;

FIG. 9 shows a view in projection on the plane X, Υ of two parts of the body of FIG. 8, wherein the second part of said body is moved along a plane parallel to the Ζ axis, and is inclined at an angle α, according to the present invention;

FIG. 10-12 respectively show a view in projection onto the X, Υ plane and two axonometric views of the body of FIG. 9 assembled with articulated locking elements;

FIG. 13 shows a geometric figure in the X, Υ 'plane, consisting of a first ellipse symmetrical with respect to the Cartesian axes tangent to a second ellipse inscribed in a first ellipse related to the present invention;

FIG. 14 shows the geometric figure of FIG. 13 without a half lying in the positive part of the axis 0-X;

FIG. 15 shows a section obtained from the geometric figure of FIG. 14 without a half lying in the negative part of the 0-Υ axis, provided with a sheet thickness of the material used to form the reflector according to the present invention;

FIG. 16 and 17 show axonometric views of an axisymmetric body obtained by rotating the section of FIG. 15 around the X axis according to the present invention;

FIG. 18 and 19 show a view in projection onto the X, Υ plane and an axonometric view of the body of FIG. 16 and 17, respectively, divided into two parts in accordance with a plane parallel to the Ζ axis, tilted by an angle α relative to the оси axis and transferred to a height of Υ = Υ 0, according to the present invention;

FIG. 20 shows a view in projection on the plane X, Υ of two parts of the body of FIG. 18 and 19, the second part of the said body being rotated through an angle of 180 ° relative to the axis parallel to the оси axis, and with the transfer Υ = Υ 0, according to the present invention;

- 3,026,835 FIG. 21 shows a view in projection on the plane X, Υ of two parts of the body of FIG. 20, the second part of the said body being moved along a plane parallel to the Ζ axis and inclined at an angle α, according to the present invention;

FIG. 22-24 respectively show a view in projection onto the X, Υ plane and two axonometric views of the body of FIG. 21 assembled with articulated locking elements;

FIG. 25 shows a known symmetrical reflector; FIG. 26 shows a known asymmetric reflector.

With reference to FIG. 1, the shape of an axisymmetric reflector for a searchlight for lighting systems according to the present invention comes from a geometric figure in the X, плоскости plane, consisting of an ellipse E symmetrical with respect to the Cartesian axes, and a pair of identical parabolas P symmetrical with respect to the Υ axis and tangent to the ellipse E at points PE1 , PE2, PE3 and PE4.

The closed curve 1 is formed by the contours of the parabola P and the contours of the ellipse E touching at points PE1, PE2, PE3 and PE4.

We call the external profile of a flat geometric figure formed in this way, Paraellips.

Unclosed curve 2 is formed by curve 1 without half lying in the positive part of the 0-X axis. Note that the said open curve 2 (Fig. 2) consists of a parabola P with a known focus suitable for the type of light source tangent to the ellipse E at points PE2 and PE3. Mathematically, there is only one such ellipse E, tangent at these points, if its focus P1E was given. The setting of the points PE2 and PE3 and the focus P1E of the ellipse is determined by the value of the highest light intensity to be obtained, and by ensuring the direct exit of all light reflected by the parabola P from the final reflector in one reflection.

Curve 3 is obtained from open curve 2 after the latter has been devoid of half lying in the negative part of the 0-axis, provided with a thickness of 1b of the sheet of malleable material used to form the reflector according to the present invention.

An axisymmetric or rotationally symmetric body 5 is obtained by rotating curve 3 about the X axis (FIGS. 4 and 5).

Plane curve 1 is simply the intersection of the X, Υ plane (or any other plane containing the rotation axis X of the axisymmetric body 5) with the axisymmetric body 5.

In practice, the axisymmetric body 5 mentioned is obtained by bending the sheet using specially designed bending forms.

The axisymmetric body 5, obtained as mentioned by bending the sheet, is divided into two parts, 51 and 52, by three-dimensional laser cutting along the cutting plane 60, which is parallel to the оси axis and inclined by an angle α relative to the оси axis (Figs. 6 and 7).

The mentioned angle α corresponds to the asymmetry angle of the highest light intensity of the spotlight, which usually lies in the range between 40 and 60 °.

In FIG. 6 it can be seen that the cutting plane 60 does not contain the Ζ axis, but is offset in the positive direction of the Υ axis by a distance Υ0 of several millimeters, used to overlap parts 51 and 52, as will be clear below (Figs. 8-10).

Then, part 52 is rotated through an angle of about 180 ° and assembled with part 51 by means of connecting inserts 61, 62, such as rivets inserted around the center of the three Cartesian axes and near the upper overlapping zone, thereby obtaining a rotary asymmetric para-elliptical reflector 6 assembly, which then called paraellipsoid 6 for simplicity.

Part 52 overlaps part 51 by a distance of a few millimeters (Fig. 10), so that the second reflective part 52 lies off-axis relative to the first reflective part 51. The inserts 61, 62 also allow you to change the inclination of part 52 relative to part 51 approximately within the + range / -20 ° relative to the theoretical angle α. Moreover, the connecting inserts 61, 62 constitute a holder for the reflector body to the reflector support member (not shown).

The ability to change the slope of part 52 allows you to determine the photometric characteristics of the reflector depending on the equation of the ellipse E tangent to parabola P. For example, the relative rotation of part 52 relative to part 51 eliminates multiple reflections inside the geometrical profile of paraellipsoid 6, optimizing the light output of paraellipsoid 6, that is, it prevents multiple reflections between the first reflective part 51 and the second reflective part 52.

The focus position P1E of the ellipse is set so that the rays exit directly from the finished reflector, the largest in a single reflection on the concave reflective surface of the paraellipsoid 6.

Said cutting plane 60 is cut so that the beam reflected on the reflecting surface of the second reflecting part 52 does not intersect the reflecting surface of the first reflecting part 51, that is, the cutting plane 60 starts from the point contained between the tangent point PE2 between the parabola P and the ellipse E, and the vertex of parabola V, and said cutting ends at the point contained between points PE3 and PE1, as shown in FIG. 1-6.

- 4,026,835

The second reflecting part 52 preferably lies off-axis with respect to the first reflecting part 51, so that the rays of the light beam exit directly from the finished reflector at the most in one reflection on the concave reflective surface of the paraellipsoid 6, and the rays of the light beam are reflected down without creating light pollution.

The same conclusions can be attributed to the bellipsoid described below.

A paraellipsoid 6 can also be considered as a body obtained: by a combination of a paraboloid 65 and an ellipsoid 66 connected along a line 67 formed by points 68 through which the common tangent planes 69 (Fig. 4) pass without corresponding symmetrical halves; separation into two parts, 51 and 52, of the remaining body by a cutting plane inclined by an angle α equal to the asymmetry angle of the highest light intensity (Figs. 6 and 7); rotating accordingly the two parts 51 and 52 (Fig. 8); assembly by means of connecting means 61, 62 attached along the overlapping zone of the corresponding edge of the two parts 51 and 52 (Figs. 9 and 10).

Paraellipsoid 6 is used in the present invention in order to obtain an axisymmetric floodlight for lighting installations.

Experimental studies, with a cutting plane inclined by about 60 °, corresponding to the asymmetry angle of the highest light intensity of the spotlight, proved that the reflector 6 assembly, both in the case of illumination with a short arc and a long arc, has a photometric curve with the highest light intensity at about 60 ° (asymmetry angle) of about 15,000 candelas, i.e. corresponding to the highest light intensity of symmetric reflectors and far exceeding the highest light intensity of known asymmetric reflectors (1000- 1400 candelas).

Preferably, said paraellipsoid 6 at about 0 ° has a light intensity much lower than traditional asymmetric reflectors, i.e. 150 candelas instead of the usual 250 candelas. This allows you to get very small values of the light intensity under the support, with the ensuing advantages in terms of uniformity of lighting.

The efficiency of paraellipsoid 6 is essentially the same as that of the best known asymmetric and symmetric reflectors, i.e. between 70 and 80.

If the designer wants to reduce the magnitude of the greatest intensity, for example, leading it to 4500-5000 candelas from the nominal 15000 candelas without compromising efficiency, he can make a certain number of faces 81 on the paraboloid. The larger the number of said faces 81, the smaller the decrease in light intensity.

Therefore, the paraellipsoid 6 according to the invention makes it possible to illuminate very large areas, such as football fields, with high illumination intensities, without light pollution and with high uniformity of illumination.

Preferably, the cutting angle α corresponds to the angle of asymmetry α between the axis corresponding to the projected beam of the highest light intensity of the searchlight and the angle between the vertical straight line 71, that is, the axis perpendicular to the horizontal plane 70 of light emission made with the possibility of having a glass of the searchlight and the beam 72 of the highest intensity the light emitted by the reflector (Fig. 10), thus providing a reduction in production defects and the subsequent simplicity of mass production of reflectors.

The above-described manufacturing method is preferably used to obtain asymmetric reflectors assembly, starting with geometric curves of various equations.

As an example, the following is an implementation process related to the combination of a larger ellipsoid and a smaller ellipsoid connected along tangent planes not containing the corresponding symmetric halves relative to the plane of symmetry of the smaller ellipsoid.

With reference to FIG. 13, the second embodiment of the axisymmetric floodlight according to the present invention comes from a geometric figure in the X, плоскости plane, consisting of an ellipse E1 symmetrical with respect to the Cartesian axes, and an ellipse E2 tangent to the ellipse E1 at points E1E2 ', E1E2.

The closed curve 7 is formed by the contours of the ellipse E1 and the contours of the ellipse E2 connected at points E1E2 ', E1E2.

Let us call the external profile of a flat figure formed in this way, “Bi-ellipse”, highlighted in bold.

The figures, consisting of an open curve 8, sections 9, an axisymmetric or rotationally symmetrical body 10, and an axisymmetric body 11, allow one to obtain a reflector 12 of an axisymmetric bellipsoid (with two ellipses) in a collection (which will be called a bellipsoid hereafter, for simplicity) as well as for the manufacture of reflector 6 axisymmetric paraellipsoid assembly.

Note that the axis Υ (Fig. 14-21) does not correspond to the axis Υ 'of the figure, but to the small axis of the ellipse E2.

Note that said open curve 8 (Fig. 14) consists of a first ellipse E1 with focus suitable for the type of light source tangent at points E1E2 'and E1E2 to the second ellipse E2. Mathematically, there is only one such ellipse E2, tangent at these points, if its focus P1E2 was given. The setting of the points E1E2 'and E1E2 and the focus P1E2 of the ellipse is determined by the value of the highest intensity, which must be ensured, and allowing all the light reflected by the first ellipse E1 to go directly from the final reflector in one reflection.

In particular, the bellipsoid 12 is made of parts 111 and 112, first separated by three-dimensional laser cutting with a cutting angle α corresponding to the asymmetry angle of the axis of the highest light intensity of the reflector, and then assembled by means of connecting inserts 121, 122 after the part 112 is rotated about 180 °.

Connecting inserts 121, 122, such as rivets or screws, are inserted around the center of the three Cartesian axes, also allowing you to change the inclination of part 112 relative to part 111 approximately in the range +/- 20 ° relative to the theoretical angle a, and overlap of several millimeters occurs between the two parts as in the above case of the paraellipsoid 6. Just like the connecting inserts 61, the inserts 121, 122 constitute a holder for the reflector body to the reflector support element (not shown).

The bi-ellipsoid reflector 12 has the same advantages as the para-ellipsoid reflector 6, with an increase in efficiency due to the fact that the light beams narrow towards the focus of the first ellipse E1 with the limited phenomenon of multiple reflection on the second ellipse E2.

A bellipsoid 12 can also be considered as a body obtained: by a combination of two ellipsoids 125, 126 connected along a line 127 formed by points 128 through which the common tangent planes 129 (Fig. 16) pass, not containing the corresponding symmetrical halves; the division of the remaining body into two parts, 111 and 112, by a cutting plane inclined by an angle α equal to the asymmetry angle of the highest light intensity (Figs. 18, 19); rotating accordingly the two parts 111 and 112 (Fig. 20); assembly by means of connecting means 121, 122 attached along the overlapping zone of the corresponding edge of the two parts 111 and 112 (FIGS. 21 and 22).

Once the geometrical parameters that provide the greatest light intensity and light output value have been set, the asymmetric reflector assembly according to the present invention is preferably manufactured on an industrial scale by: casting machines for three-dimensional bodies configured to reproduce the contour of spatial figures; three-dimensional connecting and cutting tools; finishing and coating processes of reflective surfaces.

The formation of axisymmetric or rotationally symmetrical bodies 5, 10 is preferably performed by bending the sheet. The bend of the sheet deforms a metal disk (of steel, iron, brass, copper, aluminum, and so on) that rotates on a pin having an axisymmetric shape of a concave reflective surface of an axisymmetric body 5, 10. The equipment that provides this type of simulation is turning a machine that rotates a metal disk, on which the tool acts, which deforms the original disk to make it the desired shape relative to the axisymmetric body 5, 10.

The axisymmetric body 5, 10 is cut through the technology of three-dimensional laser cutting.

Improving the lighting efficiency is achieved by resorting to metallization, anodizing and polishing technologies of reflective metal surfaces that make up parts 51, 52 and 111, 112.

The axisymmetric reflector assembly of the lighting units according to the present invention relates to any type of lamp and device, in particular having a power of 20 to 2000 W, with a long arc and a short arc.

The paraellipsoid 6 and variants, for example, related to the bellipsoid 12, provide high illumination intensities and high efficiencies by referring to asymmetry angles, preferably close to 60 ° relative to the vertical.

A similar conceptual analysis was proposed for the implementation of the planar figure of the Bellipsoid and after that the finished three-dimensional reflector Bellipsoid.

Claims (8)

CLAIM 1. A method of manufacturing an axisymmetric reflector (6, 12) assembly for floodlights for lighting installations with an asymmetry angle α between the axis corresponding to the light beam of the highest light intensity and the axis perpendicular to the output plane of the light, characterized in that it comprises the following steps: the manufacture of an axisymmetric body (5, 10), symmetrical with respect to the axis of rotation (X), formed by two axisymmetric bodies (65, 66, 125, 126), having the same tangent plane (69, 129) at common points (68, 128 ) along the line (67, 127) of the connection of the mentioned axisymmetric bodies (65, 66, 125, 126); cutting said axisymmetric body (5, 10) according to a cutting plane (60) inclined to an axis (Υ) perpendicular to said axis of rotation (X) by an angle corresponding to said angle of asymmetry α, aimed at obtaining two parts (51, 52, 111, 112); 180 ° rotation of one (52, 112) of two parts obtained by said cutting, around an axis perpendicular to a plane (X, Υ) containing said axis of rotation (X) and an axis perpendicular to it (Υ); assembly of parts (51, 52, 111, 112) by means of connecting means (61, 121); overlapping by the amount (OB) of one part (52, 112) relative to the other part (51, 111); adjusting the inclination of the parts (51, 52, 111, 112) according to the optimal light characteristic; assembly (62, 122) of parts (51, 52, 111, 112). 2. The method according to claim 1, characterized in that said axisymmetric body (5) is formed by a paraboloid (65) and an ellipsoid (66). 3. The method according to claim 1 or 2, characterized in that said axisymmetric body (10) is formed by two ellipsoids (125, 126). 4. Axisymmetric reflector (6, 12) assembly for a searchlight for lighting installations with an asymmetry angle α between the axis corresponding to the light beam of the highest light intensity and the axis perpendicular to the output plane of the light, containing reflecting parts of various shapes, including the first reflecting part (51, 111) into which the lamp is mounted, and a second reflecting part (52, 112), assembled with the first reflecting part (51, 111), so as to define a horizontal plane (70) capable of containing a searchlight glass, and A straight line (71) perpendicular to the said horizontal plane (70) is inclined by the said angle α relative to the beam of light of the highest intensity (72) emitted by the reflector, characterized in that the first (51, 111) and second reflective parts (52, 112) are obtained from an axisymmetric body (5, 10) symmetrical with respect to the axis of rotation (X) formed from two axisymmetric bodies (5, 10) having the same tangent plane (69, 129) at common points (68, 128 ) along the line (67, 127) of the connection of the mentioned axisymmetric bodies (5, 10), and T The reflective part (52, 112) was obtained by cutting the axisymmetric body (5, 10) along the cutting plane (60), inclined to the axis (Υ), perpendicular to the axis of rotation (X) of the axisymmetric body (5, 10), by the asymmetry angle α, wherein the first reflecting part (51, 111) is formed by the remaining portion of said axisymmetric body (5, 10), wherein said first (51, 111) and second reflecting parts (52, 112) in the assembly are obtained as a result of said cutting and previous rotation said second reflective part (52, 112) at approximately It is only 180 ° relative to the aforementioned first reflective part (51, 111). 5. A reflector according to claim 4, characterized in that said second reflective part (52, 112) is located above said first reflective part (51, 111). 6. Reflector according to claim 4 or 5, characterized in that said axisymmetric body (5) is formed by a paraboloid (65) and an ellipsoid (66). 7. The reflector according to claim 6, characterized in that the paraboloid (65) contains many faces (81). 8. Reflector according to claim 4 or 5, characterized in that said axisymmetric body (10) is formed by two ellipsoids (125, 126).