RU2510477C2 - Projector with lens light flux former - Google Patents

Abstract

FIELD: physics.

SUBSTANCE: projector with a lens light flux former comprises a reflector, a light source situated at the focal point of the reflector, a lens holder, a composite lens consisting of parts, one of which is a segment of a convergent lens and the other is a segment of a divergent lens, the match line of said segments enabling to obtain light flux of a given shape.

EFFECT: high efficiency of using light flux from a light source.

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Description

The present invention relates to lighting technology, in particular to a method of forming a light flux and a lighting device, and can be used to create headlights for front light of vehicles or other lighting devices with a given formation of light flux.

Currently known designs of floodlight type lighting devices, consisting of a light source, a reflector, a curtain that forms the border of the light flux, a lens holder and a collecting lens. The shutter can be fixed [JP Patent 2010160959, IPC F21S 8/12, F21W 101/10, F21Y 101/00, published July 22, 2010], [JP Patent 2010092747, IPC F21S 8/10, published April 22, 2010] or movable, allowing to generate light fluxes with different black and white borders in one spotlight [JP Patent 2011159560, IPC F21S 8/12, F21W 101/10, F21Y 101/00], [JP Patent 2011165541, IPC F21S 8/12, published on 08.25.2011].

The disadvantage of such designs is the presence of a curtain, which forms a luminous flux with a given cut-off border due to the cutoff of part of the luminous flux formed by the light source and reflected from the reflector, thereby reducing the efficiency of the searchlight.

The technical result of the invention is to increase the efficiency of use of the light flux of the light source.

The technical result achieved is achieved by the fact that a spotlight with lens formation of the light flux, comprising a reflector, a light source located at the focus of the reflector, a lens holder, a combined lens, consisting of parts, one of which is a segment of a collecting lens, and the second is a segment of a diffusing lens, segment alignment line allows you to get the luminous flux of a given shape.

In this case, the searchlight contains an additional collecting lens mounted between the light source and the combined lens, the front focus of which coincides with the focus of the reflector, to straighten part of the light flux from the light source, not reflected from the reflector.

In addition, the reflector is made parabolic or combined, with a smooth transition from a parabolic shape in the vertical plane to elliptical in the horizontal plane of the searchlight, which allows you to expand the light flux in the horizontal plane. In this case, one focus of the elliptical part of the reflector coincides with the focus of the parabolic part.

The light source is an incandescent or discharge lamp, the center of the emitting element of which is located in the focus of the reflector.

In addition, the light source is a LED mounted on the radiator or a group of LEDs, the emitting elements of which are located in the focal plane of the reflector.

A significant difference of the invention is a combined lens, consisting of a collecting and scattering segments with an alignment line, forming a luminous flux of a given shape without the use of shutter shutters. This increases the efficiency of using the luminous flux of the light source.

The invention is illustrated by drawings, where

figure 1 shows a section along the axis of the searchlight in a vertical plane with a light source in the form of an incandescent lamp or gas discharge lamp,

figure 2 shows a section along the axis of the searchlight in a vertical plane with a light source in the form of an LED mounted on a radiator.

figure 3 shows the path of the rays in the vertical plane of the searchlight with a parabolic reflector and an additional collecting lens from a point light source located in the focus of the reflector,

figure 4 shows the path of the rays in the horizontal plane of the searchlight with an elliptical reflector and an additional collecting lens from a point light source located in the focus of the reflector,

figure 5 shows a front view of a combined lens for a passing beam with an angular cut-off border,

Fig.6 shows a front view of a combination lens for a passing beam headlight with a stepped black-and-white border,

7 shows a front view of a combination lens for a high beam headlamp.

A searchlight with lens formation of the light flux contains a reflector 1 (Fig. 1), a light source 2, the emitting element of which is in the focus A of the reflector 1. The reflector 1 is connected to the lens holder 3, in which the combined lens 4 is mounted, the upper part of which is a collecting segment lenses, and the lower part - a segment of the scattering lens. Combined lens 4 is made as a single part or a team of two parts. An additional collecting lens 6 is installed between the light source 2 and the combined lens 4 on the mounts 5, the front focus of which coincides with the focus A of the reflector 1.

The light source 2 can be made in the form of a LED 7 (figure 2) mounted on the radiator 8. The center of the radiation element of the LED 7 is in the focus A of the reflector 1. The radiator 8 is equipped with a fan 9 for forced air blowing. The reflector 1 has eyes 10 (FIGS. 1 and 2) for mounting it in the vehicle headlight housing.

The work of the searchlight is as follows.

The rays from the light source 2, reflected from the reflector 1 and refracted in an additional lens 6, fall on the combined lens 4, refracted in which, are deflected in such a way that they form a luminous flux with a given boundary. When using a combined reflector, the angle of deviation of the rays horizontally increases and the luminous flux expands. 5, 6, 7, the dashed line 11 shows the shape of the light flux with a simple parabolic reflector and the dash-dot line 12 shows the shape of the light flux with the combined shape of the reflector.

To form a given border of the light flux, the alignment line 13 (Figs. 5, 6, 7) of the segments of the combined lens 4 is a broken line of various types and locations. In this case, to form the dipped headlights, one of the parts of the alignment line lies in the horizontal plane of the combined lens from the axis to the edge of the lens, opposite to the position of oncoming traffic. The opposite part of the alignment line is a simple straight line (Fig. 5) or a compound line (Fig. 6) lying below the horizontal plane of the searchlight, allowing the rays illuminating the roadside to deviate above the horizontal axis of the searchlight. To form the high beam of the headlights (Fig. 7), all parts of the alignment line 13 lie below the horizontal axis of the searchlight, raising the upper boundary of the light flux. At the same time, for the spotlights used in the high beam headlamps, the reflector is parabolic, providing a high density of the light flux.

Claims (4)

1. A searchlight with lens formation of the light flux, comprising a reflector, a light source located at the focus of the reflector, a lens holder, a lens, characterized in that the lens is a combined one, consisting of collecting and scattering segments with an alignment line forming a predetermined border of the light flux. 2. The searchlight according to claim 1, characterized in that between the light source and the composite lens an additional collecting lens is installed, the front focus of which coincides with the focus of the reflector. 3. The searchlight according to claim 1, characterized in that the reflector is made in a parabolic shape. 4. The searchlight according to claim 1, characterized in that the reflector is made of a combined shape: in the vertical plane - parabolic, in the horizontal - elliptical, with a smooth transition.

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